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Technical Reference Manual Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée. 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422-3992 Toronto, Ontario M1V 4Z9 Design and Application Guide for Honeywell Economizer Controls customer.honeywell.com ® U.S. Registered Trademark © 2007 Honeywell International Inc. 63-8594 Rev. 08-07 BLD509-10 Econ Guide Cover.indd 1 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. 7/16/07 3:47:13 PM 63-8594 Honeywell Economizers 0 Table of Contents Table of Contents Section 1 - Ventilation .................................................................................... Healthy Air ........................................................................................................................................................... Symptoms of Inadequate Ventilation ................................................................................................................... Indoor Air Ventilation Standards .......................................................................................................................... CO2 Based Demand Control Ventilation ........................................................................................................... Ventilation Requirements .................................................................................................................................... Air Handler Control Loops ................................................................................................................................... Basic Economizer Control ................................................................................................................................... Mixed Air Formulas .............................................................................................................................................. Outside Air Percentage Chart .............................................................................................................................. Example 1: Using the Outside Air Percentage Chart ........................................................................................ Example 2: Use of Outside Air Chart on a Warm Day ....................................................................................... Extra Outside Air Percentage Chart .................................................................................................................. Example 3: Minimum Ventilation Adjustment .................................................................................................... Example 4: Ventilation Review Questions ......................................................................................................... Economizer Cycle Definition ................................................................................................................................ Single and Two Stage Cooling With Economizer .............................................................................................. Section 2 - Enthalpy Theory And Controllers .............................................. The Psychrometric Chart ..................................................................................................................................... Relative Humidity and Saturation ........................................................................................................................ Enthalpy ............................................................................................................................................................... Psychrometric Chart of Enthalpy Economizer Control ...................................................................................... Single Sensor Enthalpy Control ........................................................................................................................... Two Sensor or Differential Enthalpy .................................................................................................................... Enthalpy Control with Carbon Dioxide Sensor .................................................................................................... Section 3 - Types of Economizers ................................................................ Section 3—H705 ................................................................................................................................................. Section 4—W7459 ............................................................................................................................................... Section 5—W6210 and W7210 ........................................................................................................................... Section 6—W6215, W7215 and W7460 .............................................................................................................. Section 7—W7212, W7213 and W7214 .............................................................................................................. Section 8—W7340 and W7345 ........................................................................................................................... Table Listing of Economizer Modules without DCV ........................................................................................... Table Listing of Economizer Modules with DCV ................................................................................................ Enhanced Economizer Features ......................................................................................................................... Transformer Wiring Requirements for Economizers ............................................................................................ Section 4 - H705 Economizer Module ........................................................... H705 Economizer Module ................................................................................................................................... H705 Components ............................................................................................................................................... H705 Enthalpy Setpoint ....................................................................................................................................... H705 Wiring Diagram .......................................................................................................................................... i 1 3 4 5 5 6 8 9 10 11 12 13 14 15 17 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 36 37 38 41 42 43 44 45 Honeywell Economizers 63-8594 Table of Contents Section 5 - W7459 Economizer Module ........................................................ W7459 Enthalpy Module Components ................................................................................................................. W7459A, B, C and D ............................................................................................................................................ M7215, M7415, M7405 and M8405 Actuators ..................................................................................................... W7459 Enthalpy Setpoint Chart ........................................................................................................................... High Limit Switching ............................................................................................................................................. W7459A Wiring Diagram ...................................................................................................................................... Section 6 - W6210 And W7210 Economizer Modules .................................. W7210 Economizer System Components ............................................................................................................ W6210 and W7210 Components ......................................................................................................................... High Limit Function ............................................................................................................................................ W6210 and W7210 Actuator Connections ........................................................................................................... W7210 Wiring Diagrams ...................................................................................................................................... 49 50 52 53 55 56 57 67 68 69 69 70 72 Section 7 - W6215, W7215 And W7460 Economizer Modules ...................................................................................... 87 W7215 System Components ................................................................................................................................ W6215, W7215 and W7460 Components ............................................................................................................ W7215B and W7460B Components .................................................................................................................... W6215, W7215, W7460 Inputs and Outputs ........................................................................................................ Input and Output Applications .............................................................................................................................. Free Cool Contacts ............................................................................................................................................ Exhaust Fan Setpoint ......................................................................................................................................... Purge Contacts .................................................................................................................................................. Shutdown Contacts ............................................................................................................................................ Air Change Contacts .......................................................................................................................................... Alarm Contacts ................................................................................................................................................... Minimum and Maximum Settings ......................................................................................................................... Outdoor Air Content Sensor ................................................................................................................................. W6215, W7215 and W7460 Actuator Usage ....................................................................................................... W6215, W7215 and W7460 Wiring Diagram ....................................................................................................... Indoor Air Content Sensor Settings ...................................................................................................................... Carbon Dioxide Sensor Setup .............................................................................................................................. 88 89 90 91 92 92 92 92 93 93 93 94 95 96 97 117 118 Section 8 - W7212, W7213 and W7214 Economizer Modules ...................................................................................... 119 W7212 Economizer System Components ............................................................................................................ W7212, W7213, and W7214 Components ........................................................................................................... DCV Maximum Position Adjustment .................................................................................................................. Minimum Position Adjustment ............................................................................................................................ W7212, W7213, and W7214 Wiring Diagram ...................................................................................................... 120 121 122 123 125 Section 9 - W7340 and W7345 Economizer Module..................................... 133 W7340 Economizer System Components ............................................................................................................ W7340 and W7345 Components ......................................................................................................................... W7340 only ........................................................................................................................................................ Demand Control Ventilation (DCV) Sensor Input (W7340 only) ........................................................................ Settings and Adjustment .................................................................................................................................... Wiring for W7340 and W7345 .............................................................................................................................. 63-8594 Honeywell Economizers ii 134 136 138 138 139 142 Table of Contents Section 10 - Sensors for Economizer Modules............................................ 143 Sensor Features .................................................................................................................................................. Type of Sensors for Economizer ......................................................................................................................... C7650 Temperature Sensor ................................................................................................................................ C7150 and C7046 Mixed and Supply Air Sensors .............................................................................................. Mixed or Supply Air Sensor Control Sequence ................................................................................................... Carbon Dioxide Sensor ....................................................................................................................................... 144 145 146 147 148 149 Section 11 - Checkout .................................................................................... 151 Standard Checkout Procedure ............................................................................................................................ 152 Checkout W7212 ................................................................................................................................................. 152 Check out C7400 with W7459, W7210 and W7212: .......................................................................................... 153 Section 12 - Simulator for W7212.................................................................. 155 Section 13 – Economizer Savings Estimator .............................................. 157 Section 14 - Retrofit and Upgrades............................................................... 159 How replace an H205 or Barber Colman TH2 Electromechanical Enthalpy control with an H705 ...................... 170 Economizer Systems Quick Selection Guide ...................................................................................................... 171 Cross Reference .................................................................................................................................................. 172 Appendix ......................................................................................................... 179 Glossary .............................................................................................................................................................. 179 Accessories for the M74XX Series Actuators ...................................................................................................... 182 iii Honeywell Economizers 63-8594 Table of Contents 63-8594 Honeywell Economizers iv Section 1 - Ventilation Section 1 - Ventilation DAMPER EX. AIR DAMPER O.A. DAMPER MIXED AIR SECTION 1 FILTERS M23621 Honeywell Economizers 63-8594 Section 1 - Ventilation Indoor Air Quality The characteristics of the indoor climate of a building, including the gaseous composition, temperature, relative humidity, and airborne contaminants. The Arab oil embargo of 1974 caused many building designers to begin implementing utility cost reduction measures. One of these measures was to seal up the building shell to reducing exfiltration of indoor air and the resultant heat loss. Utility costs were reduced but there was a significant negative side effect that was not detected until 1988: Indoor Air Quality. Many buildings constructed prior to 1974 had sufficient leakage through poorly sealed windows and doors to adequately ventilate the building. Construction methods 63-8594 Honeywell Economizers 2 used between 1974 and 1988 substantially reduced this leakage. As a result many buildings constructed between 1974 and 1988 are not adequately ventilated. As the energy costs continue to rise into the beginning of the 21st century, building managers are seeking ways to reduce the energy usage in new and existing buildings and continue to provide a healthy environment for the building occupants. Section 1 - Ventilation Healthy Air Building-Related Illness A diagnosable illness with identifiable symptoms whose cause can be directly attributed to airborne pollutants within a building such as Legionnaires disease or hypersensitivity pnuemonitis. The American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) are engineers in the HVAC industry who establish standards for the mechanical equipment used to heat, cool and ventilate buildings. The local, state, national and international buildings codes are based on these standards. ASHRAE Standard 62.1 is the ventilation standard. It states “indoor air quality is acceptable when there are no known 3 contaminants at concentrations determined to be harmful to building occupants, as determined by cognizant authorities, and when a substantial majority (80% or more) of those persons exposed to the indoor air do not express dissatisfaction with its quality.” This standard establishes minimum outdoor air ventilation required to provide a healthy environment for the building occupants. Honeywell Economizers 63-8594 Section 1 - Ventilation Symptoms of Inadequate Ventilation Headaches Dizziness Drowsiness Fatigue Nausea Eye Irritation Respiratory Irritation Causes of poor indoor air quality are not always caused by the design of the building. Poor or improper maintenance such as outdoor air dampers that are blocked open or completely closed, defective damper actuators or incorrectly set or malfunctioning controls may also cause inadequate ventilation. Many maintenance people respond to occupant complaints with only temperature in mind. If the room is within the acceptable temperature 63-8594 Honeywell Economizers 4 range of 68 to 78°F. (20 to 26°C) it is perceived that no adjustments are necessary. The occupants may have many of the symptoms listed above but do not have the knowledge to request “open the outside air damper” or “increase the volume of supply air to this room.” It is incumbent on the knowledgeable HVAC service person to recognize inadequate ventilation when it is encountered. Section 1 - Ventilation Indoor Air Ventilation Standards ASHRAE is continually updating the ventilation standard (ASHRAE 62.1) to provide guidelines for design and maintenance of buildings. These standards are recommended guidelines only and are not legal requirements. However many state and local codes use the ASHRAE standards as the basis for building codes for new construction and building occupancy. They also form a basis for litigation in indoor air quality lawsuits. Some measurements and chemicals referred to in the standards may not be familiar to the average person in the HVAC industry. However the majority of the information contained in these standards is very clearly stated. Everyone in the HVAC industry should be knowledgeable about the contents of these standards. The ventilation standard states a minimum outdoor air ventilation rate required per person per type of environment in Cubic Feet per Minute (cfm). The ventilation requirement varies between occupied and unoccupied periods. Outdoor air dampers are set to a minimum position based on the maximum occupancy level for the space. To save energy costs the ASHRAE 62.1 standard also allows ventilation to be based on sensor input that determines occupancy. This is commonly referred to as demand control ventilation (DCV). CO2 Based Demand Control Ventilation outdoor air intake when the space is not occupied to the maximum design occupancy level. DCV is an energy conservation measure; its purpose is to reduce outdoor air intake rates and the energy required to condition the outdoor air when spaces are not occupied at maximum design densities. For those who do not want to read an engineering standard, the ASHRAE 62.1 committee has written a user manual that: • offers information on the intent and application of Standard 62.1 • provides sample calculations and examples. • provides useful reference materials. • gives guidance to building operation and maintenance personnel. Standard 62.1 Ventilation for Acceptable Indoor Air Quality (ANSI Approved) Order from ASHRAE Publications Sales 1791 Tullie Circle, N.E. Atlanta, GA 30329 or CO2 is a fairly dependable indicator of the concentration of the odorous bioeffluents exhaled by human beings. Therefore we can use CO2 concentration levels in a space to determine the human occupancy and reduce www.ashrae.org 5 Honeywell Economizers 63-8594 Section 1 - Ventilation Ventilation Requirements Ventilation is defined as the process of bringing outside air into a building. The four major reasons for ventilation are: 1. To ensure a healthy atmosphere. Ventilation is used to dilute indoor contaminants and provide fresh air for breathing. system. Section 6 of ASHRAE 62.1 offers two procedures designers can use to determine ventilation rates, Ventilation Rate Procedure (VRP) and the Indoor Air Quality Procedure (IAQP). 2. To pressurize the building. Positive pressure inside a building prevents infiltration of unconditioned and unfiltered outside air through openings. 3. To provide atmospheric cooling. Bringing in cool outside air is more energy efficient and less costly than using mechanical cooling equipment. 4. To replace air that is being exhausted. The term for this is make-up air. Whenever air is exhausted, replacement air must be provided. The VRP method is based on typical spaces and usage, the rates are intended to dilute and exhaust bioeffluents from occupants and building contaminants to satisfy the 80% of the occupants of the space. There are two sources of contaminants in a space that ventilation is intended to reduce: Occupants and their activities (e.g., use of office equipment) and Off-gassing from building materials. The ventilation rate in the breathing zone (Vbz) required for both people related sources (Vp) and building related sources (Va) is: Vbz = Vp + Va Vp and Va both have two components; Vp is the number of people in the space (Pz) times the occupant comfort factor Rp (minimum ventilation rate determined by extensive studies for occupant comfort based on activity level in the space) and Va is the area of the space (Az) times the building component factor Ra (minimum ventilation rate determined by extensive studies for occupant comfort based on type of space). Therefore ventilation required in the breathing zone becomes: DAMPER EX. AIR DAMPER O.A. Vbz = RpPz + RaAz DAMPER MIXED AIR SECTION FILTERS M23621 The mixed air controls are used to maintain a minimum ventilation volume at all times. This is in addition to controlling the dampers for atmospheric cooling. Determining the amount of ventilation required for a space is probably one of the hardest an engineer faces in the design of the ventilation 63-8594 Honeywell Economizers 6 Rp and Ra values are found in ASHRAE 62.1 User’s manual (Table 6-A) and ASHRAE 62.1 Standard. The outdoor air or recirculated air may be cleaned using a filter or air cleaner but the outdoor air ventilation rates cannot be reduced below the rate determined by the above formula. Section 1 - Ventilation For a single zone system VOT (outdoor ventilation) is the same as Vbz. For multiple zone systems a zone air distribution system effectiveness (E) factor needs to be used in the calculation of the VOT. See ASHRAE Standard 62.1 for method. The IAQP method is used for spaces where the designers target a specific contaminant and control the level of the contaminant concentration. This method has two requirements: Maintain concentration of specific contaminant(s) below target concentration limits and achieve a design target of perceived indoor air quality acceptability. The IAQP method allows ventilation rates to be lower than the rates required by the VRP method if it can be demonstrated the resulting air quality can meet the required criteria. The IAQP procedure has 4 steps: • Identify the contaminants of concern. • Determine acceptable concentration of contaminant(s). • Specify the perceived indoor air quality criteria. • Apply an acceptable design approach to achieve the performance criteria. Additional information on ventilation and the two methods used to determine the ventilation rates can be found in ANSI/ASHRAE Standard 62.1 and in the User’s manual for ANSI/ ASHRAE Standard 62.1. Both documents are available on the ASHRAE website at http://resourcecenter.ashrae.org/store/ashrae/ Example using the VRP method: Office space of 6600 sq. feet with maximum occupancy of 7 persons per 1000 ft2. Vbz = RpPz + RaAz where Rp = 5 cfm per person (Table 6-A ASHRAE 62.1 User’s Manual) Pz = 7 person per 1000 ft2 x Az Ra = 0.06 cfm per ft2 (Table 6-A ASHRAE 62.1 User’s Manual) Az = 6600 ft2. Vbz = 5 ft3 / min/person x 7 persons/1000 ft2 x 6600 ft2 + 0.06 ft3/ min/ft2 x 6600 ft2 = 231 cfm + 396 cfm =627 cfm 7 In our example during maximum occupancy the ventilation is 627 cfm. When the occupancy rate is less than the maximum occupancy, the ventilation rate can be adjusted to a lower occupancy and the ventilation increased as the CO2 level in the space increases. This can be done following these steps: • Calculate the VOT. • Use Vbz = RpPz + RaAz, where Pz = 0. This is the new ventilation rate Vat (the area building based component). • Add a CO2 sensor to the space. • Adjust the CO2 maximum to the Vbz (for maximum occupancy). • Adjust the minimum position for occupancy for Va. In our example the Vbz ventilation is 627 cfm and the minimum position (Va) is 396 cfm. Using a CO2 sensor for Demand Control Ventilation, the new minimum position is set for 396 cfm and the maximum damper position for occupancy ventilation is 627 cfm. When one person enters the space or the commercial thermostat goes into occupancy mode, the outdoor air dampers will open to bring in 396 cfm of outdoor air. As space occupancy increases, the CO2 level will increase and the outdoor air dampers will modulate open to the maximum of 627 cfm of outdoor air. NOTE: When the commercial thermostat calls for free cooling using an economizer, the dampers are still allowed to override the DCV maximum position for ventilation and open the damper 100% open for free cooling. Honeywell Economizers 63-8594 Section 1 - Ventilation Air Handler Control Loops DAMPER RETURN AIR FROM ROOM EX. AIR HEATING COIL DAMPER MIXED AIR O.A. SUPPLY AIR TO BUILDING FILTERS DAMPER COOLING COIL CONDITIONING SECTION MIXED AIR SECTION FAN FAN SECTION TERMINAL SECTION M23889 There are typically four sections of an air handler. The Mixed Air Section is where return air and outside air are combined (mixed). Some fans may be 100% return air or 100% outside air and will not have a mixed air section. The Conditioning Section commonly contains filtration, heating, cooling and humidification. The filters and heating and cooling coils are located in the conditioning section of the air handler. 63-8594 Honeywell Economizers In the Fan Section on the air handler shown there is a supply fan. On other air handlers there may be a return or exhaust fan. The supply fan on this unit is referred to as a pullthrough because it is located on the outlet of the coils. If it were located in front of the coils then it would be a push-through fan. The Terminal Section is composed of all the components between the central fan and the zones. 8 Section 1 - Ventilation Basic Economizer Control DAMPER EXHAUST AIR RETURN AIR FROM ROOM DAMPER TR B TR1 C SO A + D SR DAMPER MOTOR + 5 1 3 2 4 X 6 D H705 ENTHALPY CONTROL DAMPER LINKAGE OUTSIDE AIR SUPPLY AIR TO BUILDING F 110 120 130 100 F 140 90 130 140 15 80 170 60 120 90 16 70 110 100 15 80 100 80 16 70 180 170 60 180 120 60 40 °F 140 PROPORTIONAL MINIMUM POSITION CONTROL FOR ECONOMIZER TWO-POSITION OUTSIDE AIR HIGH LIMIT. CLOSES OUTSIDE DAMPERS AIR DAMPERS TO MINIMUM WHEN OUTSIDE AIR TEMPERATURE IS HIGHER THAN 70˚F (21 C) Shown is the most basic temperature based electric economizer control configuration. The averaging element mixed air controller with the sensing element is located in the duct before the cooling or heating coils and maintains the mixed air at 55°F (13°C). A two position limit controller with sensing element in outdoor air is used to close the outside air dampers to a minimum position if the outdoor air temperature is too warm to use for cooling. There is a minimum position control on most air handlers. The function of this control is to ensure proper ventilation. The control provides adjustable damper positioning between 0 and 100%. The outdoor damper position must be set for minimum ventilation requirements based on building occupancy as defined by state or local code. 9 PROPORTIONAL MIXED AIR CONTROLLER. SETPOINT 55˚F (13 C) M23916 NOTE: A setting of 25% does not produce 25% airflow because the flow through dampers is nonlinear. It is important to know how much outside air is being brought into a building through the outdoor dampers on the air handlers. When the return and mixed air temperatures can be measured there is a formula used to calculate the settings that will provide the desired quantity of outside air. A second formula is used to calculate the mixed air temperature when the outside air temperature, the return air temperature and the required percentage of outside air are known. Using the formula Vbz = Vp we know the total ventilation and volume required. Honeywell Economizers 63-8594 Section 1 - Ventilation Mixed Air Formulas “OA” “MA” MIXED AIR SENSOR + S “RA” CONTROLLER TB8220 COMMERCIAL PRO M23917 Return Air Temperature Return Air Temperature _ _ Mixed Air Temperature Outdoor Air Temperature x 100% = Volume (%) of Outside Air Formula for Measuring the Percentage of Outside Air in an Air Handler. This formula is used to determine the percentage of outside air by volume that is being brought into a building from the outside. The OA dampers can be adjusted by measuring the MA, OA and RA to balance the Return Air Temperature X % of Return Air + correct Vbz. It is a test that should be conducted during routine maintenance to ensure that the correct percentage of ventilation is being provided. Outside Air Temperature X % of Outside Air = Temperature of Mixed Air Formula for Adjusting the Minimum Position Control. This formula is used to make adjustments to the mixed air controls. In ASHRAE 62.1 there are two components of the percent of outdoor air ventilation required, the human component and the buildings effluent component. The rates in the standard are based on the type of human activity normally performed in the building. For example: the base rate for office buildings is 5 cfm per person and the building 63-8594 Honeywell Economizers 10 effluent rate is 0.06 cfm per square foot of space. Initially only two temperatures are measured, return and outside air. The minimum position control is then adjusted until the mixed air temperature is equal to the result of the formula. For design requirements for CFM per person for all building types, refer to ASHRAE standard 62.1 section 6 and/or local or state building codes. Section 1 - Ventilation Outside Air Percentage Chart MIXED and RETURN AIR TEMPERATURES -29 C -20 F % O U T S I D E -23 -10 -18 0 -12 10 -7 20 -1 30 4 40 10 50 16 60 21 70 27 80 32 90 38 100 43 49 C 110 120 F 0% 0% 10% 10% 20% 20% 30% 30% O U T 40% S I 50% D E 60% 40% 50% 60% A 70% I R 80% 70% 90% 90% A I 80% R 100% -20 F -29 C % 100% -10 -23 0 -18 10 -12 20 -7 30 -1 40 4 50 10 60 16 70 21 80 27 90 32 100 38 110 120 F 43 49 C OUTSIDE AIR TEMPERATURE M25274 This chart can also be used for measuring the percentage of outside air on an air handler. The same three temperatures are measured per the formulas on the preceding page. Lines are drawn on the chart using a ruler. As with the formulas this chart is most effective if there is at least a 10 degree F difference between the return and outside air. This will typically require either a warm or cold day rather than moderate weather. It is more accurate to measure outside air percentage on a day 11 when the outside temperature is 10°F (-12°C) rather than on a day when it is 70°F (21°C). If the temperature difference between the return and outside air is only a few degrees, a small error in measurements can alter the results by as much as 50% using this method. If the temperature difference is 40 or 50°F (22 or 28°C) small errors in measurement do not substantially affect the results of the calculations. Honeywell Economizers 63-8594 Section 1 - Ventilation Example 1: Using the Outside Air Percentage Chart OUTSIDE AIR CHART MIXED AIR TEMP 59 F (15 C) OUTSIDE AIR TEMP 25 F (-4 C) RETURN AIR TEMP 70 F (21 C) MIXED and RETURN AIR TEMPERATURES -29 C -20 F -23 -10 -18 0 -12 10 -7 20 -1 30 4 40 10 50 16 60 21 70 27 80 0% % 10% 20% O U T S I D E 1 Measure the mixed air temperature. This should be done in 4 or more locations and averaged. 40% 50% 60% 6 A 70% I R 80% Measure the return air temperature. 3 2 Draw a line straight down from the mixed air temperature till it intersects the line that was just drawn. Draw a line from the return air on top to the outside air on the bottom. 0% 10% % O U T 40% S I 50% D E 60% 30% A I 80% R 70% Measure the outside air temperature. 90% 100% 100% -20 F -29 C 43 49 C 110 120 F 20% 5 90% 38 100 4 30% At the point of intersection draw a line to the left till the percentage of outside air is indicated. 32 90 -10 -23 0 -18 10 -12 20 -7 30 -1 40 4 50 10 60 16 70 21 80 27 90 32 100 38 110 120 F 43 49 C OUTSIDE AIR TEMPERATURE 1. Measure the return air temperature. According to the results from this chart this air handler is supplied with 26% outside air. If the total supply volume is 20,000 cubic feet per minute (cfm) (566 m3/min) then: M25275 2. Measure the outside air temperature. 3. Draw a line from the return air temperature to the outside air temperature. 0.26 X 20,000 cfm of total supply air equals 5,200 cfm of outside air (147 m3/min). 4. Measure the mixed air temperature in multiple locations and determine the average. This indicates that when the measurements were done on this air handler the total volume of outside air in the mixed air was 5,200 cfm of outside air (147 m3/min). 5. Draw a line down from the mixed air temperature to the point where it intersects the first line. 6. Draw a line from the point of intersection to the outside air percentage on the left side of the chart. 63-8594 Honeywell Economizers 12 Section 1 - Ventilation Example 2: Use of Outside Air Chart on a Warm Day OUTSIDE AIR CHART MIXED AIR TEMP 75 F (24 C) OUTSIDE AIR TEMP 84 F (29 C) RETURN AIR TEMP 71 F (22 C) MIXED and RETURN AIR TEMPERATURES -29 C -20 F -23 -10 -18 0 0% % -7 20 -1 30 4 40 10 50 16 60 21 70 27 80 30% A 70% I R 80% 90% 10% 5 6 Measure the mixed air temperature. This should be done in 4 or more locations and averaged. 20% Measure the outside air temperature. 70% 3 At the point of intersection draw a line to the left till the percentage of outside air is indicated. Draw a line from the return air on top to the outside air on the bottom. 2 % O U T 40% S I 50% D E 60% 30% A I 80% R 90% 100% 100% -20 F -29 C 43 49 C 110 120 F 4 40% 60% 38 100 0% Draw a line straight down from the mixed air temperature till it intersects the line that was just drawn. 50% 32 90 1 Measure the return air temperature. 10% 20% O U T S I D E -12 10 -10 -23 0 -18 10 -12 20 -7 30 -1 40 4 50 10 60 16 70 21 80 27 90 32 100 38 110 120 F 43 49 C OUTSIDE AIR TEMPERATURE M25276 The chart can also be used on a warm day when the outside air temperature exceeds both the return and the mixed air temperatures. The first line drawn will slant in 13 a different direction. Once again it is best to do this test when there is a minimum of 10 degrees F difference between the outside and return air. Honeywell Economizers 63-8594 Section 1 - Ventilation Extra Outside Air Percentage Chart MIXED AIR TEMP OUTSIDE AIR TEMP RETURN AIR TEMP OUTSIDE AIR CHART % -29 C -20 F 0% -23 -10 -18 0 -7 20 -1 30 4 40 50 10 10 50 60 16 16 60 70 21 21 70 80 27 27 80 90 32 32 90 100 38 38 100 MIXED and RETURN AIR TEMPERATURES -12 10 40 4 30% 40% 0% 43 49 C 110 120 F 60% 80% 60% 50% A 70% I R 80% 90% 110 120 F 43 49 C % 70% A I R 90% 100% O 30% U T 40% S I 50% D E 10% 30 -1 10% 20 -7 20% 10 -12 20% 0 -18 14 63-8594 Honeywell Economizers O U T S I D E -10 -23 100% -20 F -29 C OUTSIDE AIR TEMPERATURE M25277 Section 1 - Ventilation Example 3: Minimum Ventilation Adjustment EXHAUST AIR DAMPER RETURN AIR 73˚F (23 C) DAMPER OUTSIDE AIR 30˚F (-1 C) M23910 1. Specifications: Office space - 100,000 ft2 Air handler capacity 20,000 cfm (566 m3/min.) People in area - 250 3. Ventilation percentage: 7250 cfm (205.3 m3/min)/20,000 cfm (570 m3/min) VOT maximum position= 36% 6000 cfm (169.9 m3/min)/20,000 cfm (570 m3/min) VOT Minimum position= 30% 2. Ventilation (VOT) required: = 250 x 5 cfm + 0.06 cfm/ft2 x 100,000 ft2 = 1250 cfm + 6000 cfm = 7250 cfm Where Vat = 0.06 cfm/ft2 x 100,000 ft2. Therefore Vat = 6000 cfm 4. Measure the return air temperature: 73°F (23°C). 5. Measure the outside air temperature: 30°F (-1°C). This example shows a procedure for adjusting the DCV maximum and minimum positions. 15 Honeywell Economizers 63-8594 Section 1 - Ventilation RETURN AIR 73˚F (23 C) FILTERS OUTSIDE AIR 30˚F (-1 C) SUPPLY AIR + S SUPPLY OR MIXED AIR SENSOR COILS FAN ADJUST THIS SETTING UNTIL THE MIXED AIR IS 62.5˚F (17 C) COMMERCIAL THERMOSTAT M23918 Return Air Temperature % of Return Air X + Outside Air Temperature % of Outside Air X = Temperature of Mixed Air 6. Use the mixed air temperature formula or the graph to determine the Demand Control Ventilation maximum MAT: 73°F (23°C) X 64% 46.7°F (8.2°C) + 30°F (-1°C) + X 36% = 10.8°F (-11.8°C) Temperature of Mixed Air 57.5°F (14.2°C) 7. Use the mixed air temperature formula or the graph to determine the minimum position MAT: 73°F (23°C) X 60% 43.8°F (8.2°C) + 30°F (-1°C) + 12°F (-11°C) 8. Close the outside air dampers. The method used for this depends upon the controller being used. 30% = Temperature of Mixed Air 55.8°F (13.2°C) 11. Close the outside air dampers. Turn the minimum position control (pot) until the measured mixed air temp is 55.8 °F (13.2°C). 9. Turn the DCV maximum position control (pot) until the measured mixed air temperature is 57.5°F (14.2°C). 12. Mark this setting on the control as being 30% outdoor air. 10. Mark this setting on the control as being 36% outdoor air. 63-8594 Honeywell Economizers X 16 Section 1 - Ventilation Example 4: Ventilation Review Questions EXHAUST AIR DAMPER RETURN AIR 68˚F (20 C) 30,000 CFM (849 M3 MIN.) OUTSIDE AIR 21˚F (-6 C) M23920 4. Measure the return air temperature: 68°F (20°C) 1. Specifications: Office space - 200,000 ft2. Air handler capacity - 30,000 cfm (849 m3/min) People in area - 350 5. Measure the outside air temperature: 21°F (-6°C) 2. Ventilation required: =350 x 5 cfm per person + 0.06 cfm/ft2 x 200,000 ft2 =1750 cfm + 12,000 cfm =13750 cfm This is the air handler for an office building with 350 people maximum occupancy. Complete the required steps in the procedure to adjust the controls for the correct volume of ventilation. 3. Ventilation percentage: 13750 cfm (389.4 m3/min)/30,000 cfm (849 m3/min) 17 Honeywell Economizers 63-8594 Section 1 - Ventilation RETURN AIR 68˚F (20 C) FILTERS OUTSIDE AIR 21˚F (-6 C) SUPPLY AIR + S SUPPLY OR MIXED AIR SENSOR ADJUST THIS SETTING UNTIL THE MIXED AIR IS ___˚F (___ C) CONTROLLER COMMERCIAL THERMOSTAT M23919 Return Air Temperature X % of Return Air Outside Air X % of + Temperature Outside Air = Temperature of Mixed Air 6. Use the mixed air temperature formula or the graph: 68°F (20°C) X ____% _____°F (____°C) + 21°F (-6°C) + ____% _____°F (_____C) = Temperature of Mixed Air _____°F (____°C) 9. Mark this setting on the control as being _____% outdoor air. NOTE: Note use this formula to determine DCV maximum MAT and Minimum position MAT. 10. Turn the minimum position until the measured mixed air temperature is _____°F (_____°C). 7. Close the outside air dampers to the minimum position. The method used for this depends upon the controller being used. 11. Mark this setting on the control as being _____% outdoor air. 12. Restore all settings and setpoints. 8. Turn the DCV maximum control (potentiometer) until the measured mixed air temperature is _____°F (_____ °C). 63-8594 Honeywell Economizers X 18 Section 1 - Ventilation Economizer Cycle Definition ECONOMIZER PANEL YES SINGLE STAGE COOLING OUTSIDE AIR COOL? OPEN OUTSIDE AIR DAMPER NO Y1 Y2 FIRST STAGE COOL MECHANICAL COOL 1 SECOND STAGE COOL COMPRESSOR CONTROLLER/ COMMERCIAL THERMOSTAT On a First Call for Cooling From Commercial Thermostat (Y1) M13816 When the mixed or supply air goes below 50°F (10°C) the damper is modulated towards closed. Controller signal is routed to the economizer logic module. When the mixed or supply air goes above 56°F (13°C) the damper is modulated towards open. IF THE OUTDOOR AIR IS SUITABLE FOR FREE COOLING: Actuator modulates the outdoor damper open until the room temperature is cool enough to satisfy the call for cooling and maintain the mixed or discharge air between 50 and 55°F (10 and 13°C). When the mixed or discharge air is between 50 and 55 °F (10 and 13°C) the actuator will hold damper position. 19 IF THE OUTDOOR AIR IS NOT SUITABLE FOR FREE COOLING: The first stage of the cooling compressor is turned on and the dampers are set to minimum for occupancy requirements (Vat if using DCV, VOT if no DCV). Honeywell Economizers 63-8594 Section 1 - Ventilation Single and Two Stage Cooling With Economizer ECONOMIZER PANEL YES TWO STAGE COOLING OUTSIDE AIR COOL? NO Y1 OPEN OUTSIDE AIR DAMPER FIRST STAGE COOL MECHANICAL COOL 1 Y2 SECOND STAGE COOL MECHANICAL COOL 2 COMPRESSORS CONTROLLER/ COMMERCIAL THERMOSTAT On a Call for Second Stage Cooling IF THE OUTDOOR AIR IS NOT SUITABLE FOR FREE COOLING: Controller signal is routed to the economizer logic module. The first stage cooling compressor is on, and the logic module turns on the second stage of mechanical cooling. IF THE OUTDOOR AIR IS SUITABLE FOR FREE COOLING AND THE OUTSIDE AIR DAMPERS ARE OPEN: The economizer logic turns on the first stage of mechanical cooling for the second stage of cooling required by the commercial thermostat. 63-8594 Honeywell Economizers M13817 20 NOTE: A commercial thermostat with a minimum of two stages of cooling is required. The first stage must be available for economizing if outside air is suitable. Section 2 - Enthalpy Theory And Controllers Section 2 - Enthalpy Theory And Controllers 50 BTU/LB 116 k-J/kg 90 % % 25 BTU/LB RH 58 k-J/kg 5 20 BTU/LB 60 15 55 BTU/LB 34.8 kJ/kg 50 45 35 40 F( 27 60 % 69.7 k-J/kg 46.4 k-J/kg F( 13 C F( 10 C) F( 7C ) F( 16 )W ET WE 4 C) WE BU TB F( WE UL 4C TB B F( ) WE UL 2C ) W B TB ET UL BU B LB ) WE % 80 RH 30 BTU/LB F( 29 C 70 SA T 81.4 k-J/kg F( 32 C) WE T RH UR 35 BTU/LB 85 80 AT IO 92.8 k-J/kg RH N- 40 BTU/LB 90 10 0% 104.5 k-J/kg RH RH 45 BTU/LB TB UL B 0% 0% 30 75 24 RH 70 RH % 65 RH 20% LB F( C) C) F( 21 C F( 18 WE TB U ) W ET WE H 10% R LB TB UL TB U WE C) BU BU TB U B LB LB LB LB 40 F 50 F 60 F 70 F 80 F 90 F 100 F 110 F 120 F 4 C 10 C 16 C 21 C 27 C 32 C 38 C 43 C 49 C 35 F 45 F 55 F 65 F 75 F 85 F 95 F 105 F 115 F 2 C 7 C 13 C 18 C 24 C 29 C 35 C 41 C 46 C DRY BULB TEMPERATURES M25280 21 Honeywell Economizers 63-8594 Section 2 - Enthalpy Theory And Controllers The Psychrometric Chart This is a psychrometric chart. To use the chart effectively the thermodynamic properties of air must be known. Some common terms are: (274 meters per minute). The evaporation of the water causes the temperature to drop, this may also be referred to as the “evaporation effect.” When the temperature stops falling that is the wet bulb temperature. The sling psychrometer is a common instrument used to determine the wet bulb temperature although there are other methods now available. Dry Bulb Temperature The temperature read directly on an ordinary thermometer. Dry bulb and wet bulb are the two most readily measurable variables on the chart and when known can be used to determine all other properties on the psychrometric chart. Wet Bulb Temperature 90 RH RH RH % 50 F( 13 F( 10 C C) C) WE TB UL B TB UL ) W F( B 7C ET 40 )W B F UL 35 (4 E T C) B F( BU WE 2C LB ) W TB ET UL BU B LB 45 RH % % 40 WE C) TB UL WE % 80 F( 27 60 55 F( 16 WE TB U 70 SA T 50 60 ) % F( 29 RH UR 80 AT F( 32 C 90 85 % IO N- 10 0% RH The temperature read on a thermometer whose bulb is encased in a wet wick and with air blown across the wick at 900 ft. per minute 75 F( 24 RH 70 RH % 30 65 RH 20% F( 21 C) WE C) WE F( 18 C) TB UL B TB UL WE H 10% R LB TB UL B WE C) B B TB UL B 40 F 50 F 60 F 70 F 80 F 90 F 100 F 110 F 4 C 10 C 16 C 21 C 27 C 32 C 38 C 43 C 120 F 49 C 35 F 45 F 55 F 65 F 75 F 85 F 95 F 105 F 115 F 2 C 7 C 13 C 18 C 24 C 29 C 35 C 41 C 46 C DRY BULB TEMPERATURES M25278 63-8594 Honeywell Economizers 22 Section 2 - Enthalpy Theory And Controllers Relative Humidity and Saturation Relative Humidity Saturation Relative Humidity is the ratio of the measured amount of moisture in the air to the maximum amount of moisture the air can hold at the same temperature and pressure. Relative humidity is expressed in percent of saturation. Air with a relative humidity of 35%, for example, is holding 35 percent of the moisture that it is capable of holding at that temperature and pressure. The point at which the relative humidity reaches 100% and no more moisture can be contained in the air is the saturation point. The relative humidity and saturation lines are the only curved lines on this psychrometric chart. RH % 90 RH 85 F( 32 C) WE T F( 29 % RH 80 F( 27 60 55 50 F( 13 F( 10 C) F( 16 C) C) WE TB UL B TB UL F( W B 7C ET 40 )W B F UL 35 (4 E T C) B F( BU WE 2C LB ) W TB ET UL BU B LB 45 RH 0% % 40 WE WE 70 SA T 5 60 C) % RH UR 80 AT % IO N- 10 0% RH 90 30 75 F( 24 RH 70 RH % 65 RH 20% F( 21 F( 18 C) WE C) WE C) TB U 50 F 60 F 70 F 80 F 90 F 100 F 110 F 4 C 10 C 16 C 21 C 27 C 32 C 38 C 43 C 45 F 55 F 2 C 7 C 13 C LB B TB UL B 40 F 35 F B LB TB UL WE H 10% R LB TB UL TB U WE C) BU 120 F 49 C 65 F 75 F 85 F 95 F 105 F 115 F 18 C 24 C 29 C 35 C 41 C 46 C DRY BULB TEMPERATURES M25279 23 Honeywell Economizers 63-8594 Section 2 - Enthalpy Theory And Controllers Enthalpy Latent Heat The measure of heat used in the United States today is the British Thermal Unit or BTU. This is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. A metric unit is the joule. There are 1055 joules per BTU. Heat required to change water to vapor (steam) without change in temperature or pressure is latent heat. It is also called heat of vaporization. When water is vaporized the latent heat passes into the air, and when vapor condenses, latent heat is removed. Sensible Heat Total Heat (Enthalpy) Heat that changes the temperature of the air without changing its moisture content or dew point temperature is sensible heat. Heat added by a heating coil is sensible heat. Heat removed by a cooling coil that remains dry is also sensible heat. The sum of sensible and latent heat and is commonly referred to as enthalpy. Enthalpy is often referred to as the total heat content of the air. 50 BTU/LB 116 k-J/kg 90 % 80 AT 25 BTU/LB RH 58 k-J/kg 5 20 BTU/LB 60 15 55 BTU/LB 34.8 kJ/kg F( 27 60 % 69.7 k-J/kg 46.4 k-J/kg 50 F( 13 F( 10 C) F( 16 C) C) 4 WE WE TB UL B TB UL F( W B 7C ET 40 ) B F( WE UL 35 4C T B F( )W BU 2C LB ET ) W BU ET LB BU LB 45 C) WE % 80 RH 30 BTU/LB F( 29 70 SA T 81.4 k-J/kg F( 32 C) WE T RH UR 35 BTU/LB 85 % IO 92.8 k-J/kg RH N- 40 BTU/LB 90 10 0% 104.5 k-J/kg RH RH 45 BTU/LB 0% 0% 30 75 F( 24 RH 70 RH % 65 RH 20% F( 21 F( 18 C) WE C) WE C) TB U 50 F 60 F 70 F 80 F 90 F 100 F 110 F 4 C 10 C 16 C 21 C 27 C 32 C 38 C 43 C 45 F 55 F 2 C 7 C 13 C LB B TB UL B 40 F 35 F B LB TB UL WE H 10% R LB TB UL TB U WE C) BU 120 F 49 C 65 F 75 F 85 F 95 F 105 F 115 F 18 C 24 C 29 C 35 C 41 C 46 C DRY BULB TEMPERATURES M25280 63-8594 Honeywell Economizers 24 Section 2 - Enthalpy Theory And Controllers Psychrometric Chart of Enthalpy Economizer Control outside air will be brought in and extra cooling capacity will be required to dehumidify it. Enthalpy economizers take temperature and humidity into account. With enthalpy control, humid air below a conventional dry bulb temperature setpoint is locked out. Cooling costs are lowered in most climates when using enthalpy instead of dry bulb temperature with the economizer. A standard dry bulb economizer discussed earlier causes the air handler to switch over from outside air to return air at the setpoint of the outside air high limit. This will typically be 75 or 76°F. (24°C). Dry bulb economizers only control the outside air dampers based on temperature. If it is a cool but rainy day, the TEMPERATURE HIGH LIMIT AND ENTHALPY SELECTION OF RETURN AIR 50 BTU/LB ENTHALPY ONLY CONTROL SELECTION OF RETURN AIR 116 k-J/kg 90 RH % 25 BTU/LB RH 58 k-J/kg 50 20 BTU/LB 60 15 55 BTU/LB 34.8 kJ/kg F( 27 C 60 % 69.7 k-J/kg 46.4 k-J/kg 50 45 F( 10 F( 13 F( 16 C) C) WE C) % % 40 WE C) TB U LB TB UL B 3 75 24 RH 70 RH 0% 65 RH 20% F( WE 7C 40 TB )W F UL 35 (4 E T C B F( )W BU 2C LB ET ) W BU ET LB BU LB F( F( 21 ) H 10% R WE C) WE LB TB UL B TB UL B WE C) F( 18 C TB U WE % 80 RH 30 BTU/LB WE 70 SA T 81.4 k-J/kg F( 29 RH UR 35 BTU/LB 85 80 AT IO 92.8 k-J/kg ) % N- 40 BTU/LB F( 32 C 90 10 0% 104.5 k-J/kg RH RH 45 BTU/LB TB UL B TB U ) W ET BU LB LB 40 F 50 F 60 F 70 F 80 F 90 F 100 F 110 F 120 F 4 C 10 C 16 C 21 C 27 C 32 C 38 C 43 C 49 C 35 F 45 F 55 F 65 F 75 F 85 F 95 F 105 F 115 F 2 C 7 C 13 C 18 C 24 C 29 C 35 C 41 C 46 C DRY BULB TEMPERATURES TEMPERATURE AND ENTHALPY SELECTION OF OUTSIDE AIR FOR FREE COOLING TEMPERATURE ONLY HIGH LIMIT SELECTION OF RETURN AIR M25281 25 Honeywell Economizers 63-8594 Section 2 - Enthalpy Theory And Controllers Single Sensor Enthalpy Control There are two enthalpy control strategies available: single and differential enthalpy control. The single enthalpy control uses one enthalpy sensor located in the outdoor air in any orientation that exposes it to freely circulating air and protects it from rain, snow and direct sunlight. The enthalpy sensor replaces the dry bulb high limit used in a standard economizer. Instead of switching the mixed air control loop from outdoor to return air at a preset outdoor air dry bulb temperature, on a call for cooling from the controller or commercial thermostat the economizer logic module compares the outdoor enthalpy to a preselected setpoint. The value of the setpoint is illustrated on the psychrometric chart on page 55 with curves labeled as A, B, C or D. The setpoint selected will vary based on climate, activities in the controlled area and the type of mechanical equipment used to provide cooling. An installer can choose a more aggressive setpoint A for more free cooling or a conservative setpoint D for less free cooling. The mixed air sensor, located in the area where the return and outdoor air mix, maintains the mixed air temperature between 50 and 56°F (10.0 and 12.8°C). SINGLE SENSOR OR HIGH LIMIT ENTHALPY OUTSIDE AIR SENSOR SUPPLY AIR TO BUILDING + S MIXED OR SUPPLY AIR SENSOR COILS FAN W7212 ECONOMIZER CONTROLLER WITH DEMAND CONTROL VENTILATION TB8220 COMMERCIAL PRO C7400 SOLID STATE ENTHALPY SENSOR + S COOLING AND HEATING CONTROLLED FROM COMMERCIAL THERMOSTAT. ENTHALPY ECONOMIZER CONTROLLER FUNCTIONS AS FIRST STAGE OF COOLING. THE C7400 ENTHALPY SENSOR IS WIDELY USED WITH HONEYWELL CONTROLLERS. IT COMBINES BOTH TEMPERATURE AND HUMIDITY MEASUREMENTS INTO ONE DEVICE. TWO C7400’S ARE NEEDED TO PROVIDE DIFFERENTIAL ENTHALPY. M23906 63-8594 Honeywell Economizers 26 Section 2 - Enthalpy Theory And Controllers Two Sensor or Differential Enthalpy A dual sensor enthalpy control is equipped with the same outdoor air enthalpy sensor and an additional second enthalpy sensor in the return air. This is also referred to as differential enthalpy. On a call for cooling or when the mixed air temperature goes above 56°F, or there is a call for additional cooling from the commercial thermostat, the air with the lower enthalpy, outdoor or return, is selected to be brought into the conditioning section of the air handler. The setpoint on the logic module is turned to D whenever differential enthalpy is used. This is a very efficient method of controlling outdoor air usage since the return and outside air comparison is continuous and automatic year-round. It eliminates operator error by eliminating seasonal changeover which is frequently overlooked. Though it may appear wasteful to cool outdoor air at a higher dry bulb temperature than return air, the savings are verifiable through psychrometric calculations. The amount of mechanical cooling required to dehumidify air often exceeds the amount required to lower the dry bulb temperature. In buildings where there is a substantial amount of cooking, laundry or other moisture generating activity this type of control sequence can result in substantial savings in cooling costs. DUAL SENSOR OR DIFFERENTIAL ENTHALPY DAMPER EXHAUST AIR + S RETURN AIR SENSOR RETURN AIR FROM ROOM OUTSIDE AIR SENSOR SUPPLY AIR TO BUILDING + S MIXED OR SUPPLY AIR SENSOR COILS FAN W7212 ECONOMIZER CONTROLLER WITH DEMAND CONTROL VENTILATION TB8220 COMMERCIAL PRO M23904 27 Honeywell Economizers 63-8594 Section 2 - Enthalpy Theory And Controllers Enthalpy Control with Carbon Dioxide Sensor Most building codes allow for the option of carbon dioxide sensor-based demand control ventilation (DCV) to determine the human occupancy level of the space. Honeywell supplies controllers that combine this function with the economizer function. They are the W7212, W7340, W7460, and the W7215 economizer logic modules. All of these logic modules have inputs for a room indoor air content sensor. Additionally the W7215B is available with outdoor air content sensor inputs. The W7215 and W7212 are designed to be used with series 72 actuators and the W7460 with the M7415 actuator. The W7340 is designed to be used with an OEM system because it requires external relays to switch to compressor and communicates with the OEM system controller via a modified modbus protocol. In addition to the indoor sensor based demand control ventilation option, these logic modules have additional features including: • Maximum damper position adjustment (DCV max). • Exhaust fan setpoint. • Occupied and Unoccupied operation. • W7213 and W7214 are heat pump models. DIFFERENTIAL ENTHALPY WITH DCV DAMPER + EXHAUST AIR S RETURN AIR SENSOR RETURN AIR FROM ROOM DAMPER OUTSIDE AIR SENSOR SUPPLY AIR TO BUILDING + S MIXED OR SUPPLY AIR SENSOR COILS FAN W7212 ECONOMIZER CONTROLLER WITH DEMAND CONTROL VENTILATION C7632 ROOM CARBON DIOXIDE SENSOR TB8220 COMMERCIAL PRO 63-8594 Honeywell Economizers M23905 28 Section 3 - Types of Economizers Section 3 - Types of Economizers There are six types of Honeywell enthalpy economizer modules. All can be single or differential enthalpy. Some can be used for differential temperature with C7650 dry bulb sensors. They vary based on the actuator control series, mixed air circuitry and enthalpy sensor configuration. 29 Honeywell Economizers 63-8594 Section 3 - Types of Economizers Section 3—H705 Commercial thermostat Separate Series 70 or 90 mixed air controller Mod IV actuator The H705 is the base controller since the mixed air circuitry is not included. Its function is to provide SPDT high limit switching in a separate mixed air control circuit, typically series 90. It replaces the H205 without 63-8594 Honeywell Economizers 30 Optional second enthalpy sensor H705 on plate, one enthalpy sensor on back substantial wiring modifications. It can also be used in control circuits with other company’s devices if a SPDT economizer high limit is applicable. Section 3 - Types of Economizers Section 4—W7459 Commercial thermostat M7405, M7415 or M8405 actuators only One enthalpy or dry bulb and one mixed/supply air sensor required. Second enthalpy sensor optional. The W7459 is similar to the H705 in that only the enthalpy high limit function is provided and the mixed air control circuit is in the actuator. This restricts W7459 use to the M7415, M7405 and M8405 actuators and it installs directly onto them. Unlike the H705 there is not a sensor built into the W7459 so wiring 31 W7459 install on actuator connections are required for one or two enthalpy sensors. It is available for use with direct digital (W7459B), SPDT mixed air controllers (W7459C) or as a stand-alone mixed air controller with a mixed air sensor (W7459A or D). Honeywell Economizers 63-8594 Section 3 - Types of Economizers Section 5—W6210 and W7210 Commercial thermostat Series 62 or 72 Actuator One enthalpy or dry bulb and one mixed/supply air sensor required. Second enthalpy sensor optional. The W6210 and W7210 are for use with Honeywell series 62 or 72 actuators. The W6210 is no longer available for new installations, replacement modules may still be available. The mixed air control circuitry that was either separate or included in the actuator in the H705 or W7459 modules is included in these economizers. The options for enthalpy 63-8594 Honeywell Economizers 32 W6210, W7210 install on flat surface and mixed air sensors are the same as the W7459. The difference between the W7459 and the W7210 is the W7210 has the addition of the 2-10 Vdc out for controlling a series 70 DCA or foot-mounted motor, 24 Vac power and ground for the motor and the mixed air circuitry in the control. W6210 is used with floating series 62 motors. Section 3 - Types of Economizers Section 6—W6215, W7215 and W7460 Commercial thermostat One enthalpy or dry bulb and one mixed/supply air sensor required. Second enthalpy sensor optional. Optional room CO2 sensor on A models, additional optional outdoor CO2 sensors on B models. Series 62 or 72 or M7415 Actuator The W6215A, W7215A and W7460A economizer modules are similar to the W6210 and W7210 with the addition of inputs from a room indoor air content sensor for Demand Control Ventilation and contact inputs and outputs to monitor and control various devices. The indoor air content sensor typically will be a carbon dioxide (CO2) sensor. The B models include inputs from an outdoor 33 W6215, W7215, W7460 install on flat surface air content sensor for the function of limiting outdoor air usage when the air is not suitable for ventilation. The actuators used with these controllers are: • W6215 - Series 62 (no longer available for new installations). • W7215 - Series 72. • W7460 - M7415. Honeywell Economizers 63-8594 Section 3 - Types of Economizers Section 7—W7212, W7213 and W7214 Commercial thermostat One enthalpy or dry bulb and one mixed/supply air sensor required. Second enthalpy sensor optional. Optional room CO2 sensor on A models, additional optional outdoor CO2 sensors on B models. Series 62 or 72 Direct Coupled Actuators or M7215 Actuator The W7212 DCV economizer logic module is the simplest Demand Control Ventilation economizer model. It combines all of the benefits of the W7459 and W7210 with the added features of the W7215. It does not include shutdown, air change and purge but does have a “N” terminal for night setback. On W7213 and W7214 models N terminal is either B or O terminal for use with heat pumps. There are three models: • W7212A- Used with series 70 actuators including DCA’s, M7215, and Modutrol Motors 63-8594 Honeywell Economizers 34 W7212, W7213 and W7214 install on flat surface or mount on M7215 motor. • W7213A - Used with heat pumps or conventional rooftop units. B terminal energized in heating and unenergized in cooling • W7214A - Used with heat pumps or conventional rooftop units. O terminal unenergized in heating and energized in cooling. All models can be panel mounted or directly mounted to M7215 motor. Section 3 - Types of Economizers Section 8—W7340 and W7345 One enthalpy or dry bulb and one mixed/supply air sensor required. Second enthalpy sensor optional. W7340 Optional room CO2 sensor on W7340 models The W7340 is a full enthalpy economizer used in an OEM unit to provide a totally integrated control system. The W7345 provides temperature (OAT) control only; it does not have an option for a return air sensor, DCV sensor or exhaust control. The W7340A and B modules do not have the ability to set the outdoor air damper to a maximum position for DCV, it incorporates a minimum position setting that defaults to 20% but can be overridden using the on-board pot or Modbus communication link to a maximum of 50% open. 35 W7345 W7340 and W7345 mount on flat surface or on a M7215 motor The maximum position sets the damper position to a position that the damper goes to if the CO2 sensor fails. If the minimum position set point is higher than the DCV maximum position, on sensor failure, the damper goes to the higher of the two of DCV maximum and minimum position setting. There is no limit on the damper position on a call from the CO2 sensor (DCV). It can go 100% open, not complying with ASHRAE 62.1. Honeywell Economizers 63-8594 Section 3 - Types of Economizers Table Listing of Economizer Modules without DCV Motor Type Foot Mount 25 lb-in. Torque Motor M7415 M9175 DCA 44 lb-in. Torque Foot Mount 60 lb-in. Torque MS7505 M7285, M7286 M9185, M9186 MS7510 MS7250 DCA 88 lb-in. Torque DCA 175 lb-in. Torque a b Logic Module W7459A,D H705 or W7210b W7210 W7210 Sensors Enthalpy: C7400a with C7150/ C7046 Temperature: C7650 with C7150/ C7046 H705, W7210b W7210 W7210 Enthalpy sensor, use two for differential enthalpy and one for single enthalpy. For Dry Bulb only, use C7650 instead. To operate a series 90 motor, the W7210, W7212, W7213, W7214 and W7215 require a Q7230 interface module or the proper resistor combination (included in the 4074EJM resistor kit), see form 63-2544 for details. NOTE: Series 90 Modutrol Motors can be retrofit using W7210, W7212 and W7215 Economizer Logic modules and a Q7230 or the proper resistor combination. Refer to for 63-2544 for details on using Economizer Logic Modules with Series 90 motors. Table Listing of Economizer Modules with DCV Motor Type Foot Mount 25 lb-in. Torque DCA 44 lb-in. Torque Foot Mount 60 lb-in. Torque DCA 88 lb-in. Torque DCA 175 lb-in. Torque a b Motor M7415 M7215 M9175 MS7505 M7285, M7286 M9185, M9186 MS7510 MS7250 Logic Module W7460 W7212/13/14 Sensors Enthalpy: C7400a with C7150/ C7046 W7215b, W7212b, W7213/ Temperature: C7650 with C7150/ C7046 14b W7215, W7212, W7213/14 CO2: C7232 or C7632 W7215, W7212, W7213/14 W7215b, W7212b, W7213/ 14b W7215, W7212, W7213/14 W7215, W7212, W7213/14 Enthalpy sensor, use two for differential enthalpy and one for single enthalpy. For Dry Bulb only, use C7650 instead. To operate a series 90 motor, the W7210, W7212, W7213, W7214 and W7215 require a Q7230 interface module or the proper resistor combination (included in the 4074EJM resistor kit), see form 63-2544 for details. NOTE: Series 90 Modutrol Motors can be retrofit using W7210, W7212 and W7215 Economizer Logic modules and a Q7230 or the proper resistor combination. Refer to for 63-2544 for details on using Economizer Logic Modules with Series 90 motors. 63-8594 Honeywell Economizers 36 Section 3 - Types of Economizers Enhanced Economizer Features Economizer DCV OAQ Module Enthalpy Sensor Sensor Series High Limit (Indoor) (Outdoor) H705 W7459 YES W6210 YES W7210 YES W6215 W7215 W7460 W7212 W7340 W7345 YES YES YES YES YES YES YES YES YES YES Exhaust Shutdown Fan and Air Motors Setpoint Change Purge Controlled Series 90 Series 90 Series 90 M7405 M8405 M7415 M7415 Series 62 Series 62 Series 72 Series 72 Adjustable YES YES Series 62 Adjustable YES YES Series 72 Fixed YES Series 72 Adjustable YES YES M7415 Fixed YES M7415 Adjustable Series 72 Modbus Series 72 Series 72 37 Specific Product Number H705A1003 H705A2001 H705D1001 W7459B1009 W7459C1007 M7459A1001 W7459D1005 W6210A1003 W6210D1007 W7210A1001 W7210D1005 W6215A 008 W7215A1006 W7215B1004 W7460A1008 W7460B1006 W7212A1009 W7340C1000 W7345B1001 Honeywell Economizers 63-8594 Section 3 - Types of Economizers Transformer Wiring Requirements for Economizers PRIMARY VOLTAGE ECONOMIZER LOGIC PANEL W7459, W6210, W6215, W7210, W7215, W7460 TR TR1 CONTACT FOR COOLING IN COMMERCIAL THERMOSTAT 1S SWITCHES WHEN POWERED BY 24 VOLTS 1S 2 1 RELAY COIL FOR FIRST STAGE OF COOLING 1K 1S1 THIS SWITCH ENERGIZES THE MIXED AIR CIRCUIT M13822 Economizer Panel Supplied With Same Transformer As Cooling Commercial Thermostat. One of the most common misapplications of economizers is related to the field wiring. When the problem is the economizer will not open the dampers and it is really cool outside, check the wiring with the transformers. Relay coil 1S is used to open the outside air dampers as the first stage of free cooling. To function properly 1S must be wired to both sides of the same transformer. When the same transformer is used for supplying the commercial thermostat, cooling relay and the economizer logic module the switching occurs correctly. PRIMARY VOLTAGE ECONOMIZER LOGIC PANEL W7459, W6210, W6215, W7210, W7215, W7460 PRIMARY VOLTAGE TR TR1 CONTACT FOR COOLING IN COMMERCIAL THERMOSTAT 1S SWITCHES WHEN POWERED BY 24 VOLTS 1S 2 1 1K THIS SWITCH ENERGIZES THE MIXED AIR CIRCUIT RELAY COIL FOR FIRST STAGE OF COOLING 1S1 M13823 Economizer Panel Supplied With Separate Transformer From Cooling Commercial Thermostat. 24 Vac is supplied to the relay coil 1S in this application from two separate transformers. Though the first stage of cooling will switch correctly through the economizer module circuit, the relay coil 1S may not. Honeywell 63-8594 Honeywell Economizers recommends use of a single, larger transformer for both the economizer logic module and the cooling commercial thermostat circuit. 38 Section 3 - Types of Economizers When wiring any economizer it is very important that you read the notes on the correct wiring diagram. The wiring diagrams normally show the internal connections of the logic module to help guide you if you are concerned with the common side of the transformers. 39 A rule of thumb to follow any Honeywell electronic economizer logic module will have all terminals ending with a 1 as ground. With power supply provide a disconnect means and overload protection. Ensure the equipment transformer is sized to handle the extra load of the economizer, actuator and sensors. Honeywell Economizers 63-8594 Section 3 - Types of Economizers 63-8594 Honeywell Economizers 40 Section 4 - H705 Economizer Module Section 4 - H705 Economizer Module 41 Honeywell Economizers 63-8594 Section 4 - H705 Economizer Module H705 Economizer Module H705 ENTHALPY CONTROL DAMPER EXHAUST AIR RETURN AIR FROM ROOM DAMPER OUTSIDE AIR SENSOR TR B A SUPPLY AIR TO BUILDING TR1 C SO + SR + D 5 1 2 3 4 6 D X FAN COILS DAMPER ACTUATOR SUPPLY OR MIXED AIR SENSOR 2 HEAT 1 3 HEAT 2 100 80 3 COOL 1 HEAT 120 60 40 °F 140 WH MINIMUM POSITION CONTROL. PREVENTS FULL CLOSURE OF OUTSIDE AIR DAMPERS MOD-COOL MOD-HEAT BH SENSOR ROOM SENSOR T T1 3 4 RC RH STAT C +20 H 2 5 24 VAC BC WC ECONO H 1 TR TR W B Y R SINGLEZONE CONTROL COOL SETPOINT 76˚F (24 C) M23914 The H705 was the first Honeywell series of electronic economizer controllers. Prior to the development of the H705, an electromechanical device with a nylon humidity element, the H205, was the state-ofthe-art controller. The H705 is a direct replacement for the H205. The output is the same SPDT switch which is typically wired into the mixed air circuit. The H705 can be installed in the same location in the air handler 63-8594 Honeywell Economizers 42 as the H205 and includes all the sensors required for single sensor enthalpy. It can be converted to differential enthalpy with the addition of a C7400 sensor in the return air. The H705 can be used for single or differential enthalpy in any economizer control circuit that is equipped with separate mixed air controls and is adaptable to a SPDT limit. This includes many economizer control devices made by companies other than Honeywell. Section 4 - H705 Economizer Module H705 Components WIRES TO C7400 ENTHALPY SENSOR ON THE BACK OF PLATE ENTHALPY SETPOINT C7400 ENTHALPY SENSOR ON BACK OF PLATE TR B TR1 C SO ENTHALPY CONTROLLER ON FRONT OF PLATE A D SR 3 2 ENTHALPY CONTROLLER The H705A Enthalpy Controller provides solid state enthalpy changeover. The base configuration is single sensor enthalpy controller but it can be used for differential enthalpy. It is constructed of two devices: there is a solid state C7400 enthalpy sensor on one side of a metal plate and an enthalpy control on the other side. The device must be located in the outside air stream with a recommended minimum velocity of 500 feet per minute (152 meters per minute). The setpoint scale is A, B, C and D. Each setting corresponds to an enthalpy curve with A 43 1 RESISTOR THAT IS REMOVED IF SECOND ENTHALPY SENSOR IS INSTALLED M23915 equalling the highest enthalpy changeover and D being the lowest enthalpy changeover. The output of this control is a SPDT relay output which can be used to switch the mixed air dampers from return to outside air and back as required for maximum efficiency. There is a connection for an additional return air enthalpy sensor for differential enthalpy control. If this option is not used a 620 ohm resistor is installed across the SR and + terminals. Honeywell Economizers 63-8594 Section 4 - H705 Economizer Module H705 Enthalpy Setpoint 50 BTU/LB 116 k-J/kg 90 RH 80 AT 25 BTU/LB RH 58 k-J/kg 50 20 BTU/LB 46.4 k-J/kg A B 15 C D F( 27 C 60 % 69.7 k-J/kg BTU/LB 34.8 kJ/kg F( 29 C) 50 45 55 F( 10 60 F( 16 C F( 13 C) WE C) 4 ) WE TB UL B TB UL F( WE 7C TB )W F UL 35 (4 ET C) B F( BU WE 2C L ) W B TB ET UL BU B LB 40 % 0% 3 75 70 RH 0% 65 RH 20% B F( 24 RH F( 21 F( 18 TB U WE % 80 RH 30 BTU/LB WE 70 SA T 81.4 k-J/kg RH UR 35 BTU/LB 85 % IO 92.8 k-J/kg C) % N- 40 BTU/LB F( 32 90 10 0% 104.5 k-J/kg RH RH 45 BTU/LB ) WE C) WE C) TB UL B TB UL B WE H 10% R TB UL B TB UL B WE C) LB TB UL B 40 F 50 F 60 F 70 F 80 F 90 F 100 F 110 F 120 F 4 C 10 C 16 C 21 C 27 C 32 C 38 C 43 C 49 C 35 F 45 F 55 F 65 F 75 F 85 F 95 F 105 F 115 F 2 C 7 C 13 C 18 C 24 C 29 C 35 C 41 C 46 C DRY BULB TEMPERATURES M25282 This psychrometric chart shows effects of the various economizer logic setpoints listed. This only applies to single enthalpy controllers not differential enthalpy. Air with conditions to the left of the curve is brought in from outdoors to be used for cooling. When the outdoor air conditions are to the right of the curve, the dampers will be set at minimum position and the mechanical cooling will be energized. For differential enthalpy the setpoint knob is turned to the D setting and the lower of return or outside air is brought into the building. Example: With A, B, C, D potentiometer logic module set at “C”. Dry bulb temperature at 63-8594 Honeywell Economizers 44 65°F (18.3°C) and Relative Humidity (RH) at 50% RH the logic module would free cool on first call for cooling for commercial thermostat. Control Curve A B C D Knob turned to D Control Point (Approximate Temperature at 50% Humidity) 73°F (23°C) 70°F (21°C) 67°F (19°C) 63°F (17°C) For Differential Enthalpy (2 Sensor) Section 4 - H705 Economizer Module H705 Wiring Diagram TRANSFORMER L1 (HOT) MIXED AIR DAMPER MOTOR T1 L2 T2 W R B H705 ENTHALPY CONTROL TR B W TR1 TR C SO A D 100 80 SR 120 TR1 W 40 °F 3 2 R 60 140 F SR 620 OHM RESISTOR 1 R 120 130 140 15 80 16 70 170 60 MINIMUM POSITION CONTROL 180 B 2 ENTHALPY DECREASE 110 100 90 + 1 T991 MIXED AIR CONTROL 3 NC C NO RELAY RC NC Y1 C NO Y2 COOLING COMMERCIAL THERMOSTAT T1 L1 COOLING CONTACTOR T2 L2 M13818 The H705 enthalpy control is being used in this application in place of a dry bulb temperature economizer high limit. The H705 includes a single enthalpy sensor and is installed in the outside air. An optional second C7400 installed in the return air is used for differential enthalpy. If the second C7400 sensor is not used a 620 ohm resistor is installed across the SR and + terminals and 45 the H705 compares the outdoor enthalpy to a setpoint (A, B, C or D). The economizer modulates the outdoor dampers for free cooling provided the outside air enthalpy is below the setpoint on the H705. If the outdoor enthalpy is above the setpoint the outside air dampers are closed to a minimum position and the mechanical cooling is energized. Honeywell Economizers 63-8594 Section 4 - H705 Economizer Module L1 (HOT) L2 1 TR W936 OR W945 ELECTRONIC PANEL TR E1 T1 M745 ECONOMIZER MOTOR 1 3 L1 (HOT) L2 1 TR 2 TR 3 R E3 E2 OPTIONAL MORNING WARMUP COMMERCIAL THERMOSTAT W H705A OPTIONAL C7400A TR 2 620 TR1 OHMS SR S 3 W 4 R B 2 1 S963A OR Q209 MINIMUM POSITION POTENTIOMETER 1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400A SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. M15037A H705A used in electronic system W1 2 BLACK/YELLOW BLACK/RED BLACK/BLUE VIOLET BROWN YELLOW VIOLET WHITE/RED B1 RED BLUE YELLOW W859D ECONOMIZER CONTROL PACKAGE 3 3 R1 T872 SPACE THERMOSTAT (COOLING CIRCUIT) MODUTROL® MOTOR OPTIONAL C7400A H705A TR Y1 TR1 3 2ND STAGE COOLING CONTACTOR Y2 RC 5 SR S 620 OHMS 2 3 1 3 2 Y 1 G C 2 R 4 6 L1 (HOT) L2 COOLING TRANSFORMER 1ST STAGE COOLING CONTACTOR 1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 4 ROOFTOP TERMINAL STRIP IS PART OF AIR CONDITIONING UNIT. 5 FACTORY-INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400A SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 6 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. M12162 2 FIELD CONTROL WIRING REQUIRED TO INTEGRATE ECONOMIZER INTO UNIT. 3 FIELD WIRING REQUIRED TO PROVIDE ECONOMIZER AND MECHANICAL COOLING OPERATION IN EXISTING INSTALLATION. H705A used in electromechanical system 63-8594 Honeywell Economizers 46 Section 4 - H705 Economizer Module T7300 THERMOSTAT T7300 SUBBASE T7400/W7000 SYSTEM OPTIONAL C7400A RH TR1 TR 2 SR 620 OHMS S L1 L2 (HOT) HVAC EQUIPMENT TERMINAL STRIP H705A 6 RC EXISTING HVAC EQUIPMENT 9 SYSTEM TRANSFORMER R 3 1 2 3 3K 4 X Y1 C2 Y2 Y2 C1 W1 HEAT 1 W2 HEAT 2 Y1 H2 W2 H1 FAN G W1 4 5 FAN COOL1 COM 8 LED 1 BLACK/ YELLOW BLACK/RED G COOL 2 W LED 2 TYPICAL W859D ECONOMIZER CONTROL PACKAGE BLUE W AUX 7 R B RISE W1 OUTDOOR AIR CHANGEOVER SWITCH BROWN B1 A1 BLACK MIXED AIR TEMPERATURE CONTROLLER MODUTROL® MOTOR 1K1 1K2 R1 T1 A2 B 2K2 T675 LOW AMBIENT COMPRESSOR LOCKOUT 2K YELLOW MINIMUM POSITION POTENTIOMETER YELLOW W R B OPEN 1K RED T2 R 2K1 VIOLET VIOLET 4K1 4K1 1 L2 4 L1 (HOT) 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY-INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400A SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 3 ENTHALPY CONTROL MAKES TERMINALS 2-1 ON ENTHALPY RISE, AND 2-3 ON ENTHALPY FALL. 4 RELAY REQUIRED (R8222 OR SIMILAR). 5 ECONIMIZER MOTOR SPRING RETURNS CLOSED ANY TIME FAN IS NOT RUNNING. 6 FIELD INSTALLED JUMPER. 7 IMPORTANT: MIXED AIR SENSOR MUST BE LOCATED DOWNSTREAM OF THE EVAPORATOR COIL IN THE DISCHARGE AIR DUCT TO PROVIDE ECONOMIZER LOW LIMIT FUNCTION. 8 24 VAC ONLY. 9 MUST BE ABLE TO CARRY ADDITIONAL 6 VA LOAD OF COMMERCIAL THERMOSTAT AND SUBBASE. M12167A T7300/Q7300 using W859D Economizer Package with H705A in two-stage heating/two-stage cooling system, defeating economizer minimum position during unoccupied periods 47 Honeywell Economizers 63-8594 Section 4 - H705 Economizer Module T7400/W7000 SYSTEM L1 L2 1 (HOT) OPTIONAL C7400A T7400 THERMOSTAT 2 R 620 OHMS 3 L1 L2 (HOT) 1 SYSTEM TRANSFORMER R 1 2 WALLPLATE OR Q7400 SUBBASE 3 TR1 TR S 1 HVAC EQUIPMENT TERMINAL STRIP H705A 2 SR 4 EXISTING HVACEQUIPMENT 4 5 3K 1 W7400 CONTROL MODULE GND TR TR RH RC T7400B ONLY: T7047C1025 OR T7022A1010 REMOTE SENSOR RC 24 VAC RH Y2 W1 W1 RC 6 TD RELAY Y3 W2 W3 4 3 2 Y1 Y1 Y2 Y3 HEAT 1 HEAT 2 W2 G G FAN 1 TDR COM B COOL1 8 ECONO AUX. ENTHALPY 6 RELAY SWITCH 5 BLACK/RED A RED TDR 6 T7400 3K1 BLACK/BLUE COOL 2 W TYPICAL W859D ECONOMIZER CONTROL PACKAGE BLACK/ YELLOW BLACK MIXED AIR TEMPERATURE CONTROLLER MODUTROL® MOTOR BLUE W B1 7 R 2K1 OUTDOOR AIR CHANGEOVER SWITCH B 2K2 B 1K1 T675 LOW AMBIENT COMPRESSOR LOCKOUT 1K2 RISE W1 R R1 MINIMUM POSITION POTENTIOMETER T2 W R B YELLOW YELLOW 1K RED RED OPEN BROWN 2K T1 VIOLET 3 VIOLET FOR REMOTE MINIMUM POTENTIOMETER 1 L1 L2 (HOT) 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 5 PILOT DUTY RELAY REQUIRED (R8222N OR SIMILAR). 6 THIS CONTROL IS AN EXISTING DEVICE, WHICH MAY BE A TIME DELAY RELAY (TDR) OR L4604 (OR SIMILAR FAN CONTROL) IN SOME SYSTEMS. 7 IMPORTANT: MIXED AIR SENSOR MUST BE LOCATED DOWNSTREAM OF THE EVAPORATOR COIL IN THE DISCHARGE AIR DUCT TO PROVIDE ECONOMIZER LOW LIMIT FUNCTION. 8 JUMPER TERMINALS 5 AND 6. FACTORY-INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400A SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 3 YELLOW AND BROWN LEADS ARE SHORTED TOGETHER WHEN SHIPPED. LEAVE SHORTED IF OPTIONAL FUNCTIONS ARE NOT USED. 4 ENTHALPY CONTROL MAKES TERMINALS 2-1 ON ENTHALPY RISE, AND 2-3 ON ENTHALPY FALL. M12166 H705A used with T7400C and W7400C with separate transformer in two-stage heating/ three-stage cooling system with first stage dedicated to economizer setpoint, and either electromechanical economizer or mechanical cooling first stage 63-8594 Honeywell Economizers 48 Section 5 - W7459 Economizer Module Section 5 - W7459 Economizer Module FOR USE WITH M74XX SERIES ACTUATORS 49 Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module W7459 Enthalpy Module Components W7459 ENTHALPY CONTROL DAMPER EXHAUST AIR + S RETURN AIR SENSOR RETURN AIR FROM ROOM DAMPER OUTSIDE AIR SENSOR SUPPLY AIR TO BUILDING + S COILS DAMPER LINKAGE TR B A FAN MIXED AIR SENSOR TR1 C SO + SR + D 5 1 2 3 4 T T1 P P1 TB8220 COMMERCIAL PRO MINIMUM POSITION OPEN M7415 DAMPER ACTUATOR WITH W7459 ENTHALPY CONTROLLER M23907 The W7459 is used in conjunction with a Honeywell actuator (M7415) and sensors to control outdoor and return air dampers free cooling using outside air. It is designed to be installed directly on the actuator. The W7459 is used with Honeywell C7400 enthalpy or C7650 dry bulb temperature sensors and the M7415, M7405, and M8405 actuators. It should be in free flowing air yet out of direct rain or sunlight. It can be used as a single or differential enthalpy control. A minimum position potentiometer is built into all W7459 modules except for the W7459C since the M8405 actuator, that it is used with, has the setting built-in. All W7459 modules can be used with remote minimum position potentiometers. See Table 1 for model capability with motors. M7415, M7405 OR M8405 ACTUATOR W7459 ENTHALPY CONTROL MODULE TR TR1 T T1 P1 P MOTOR TERMINALS M13837 63-8594 Honeywell Economizers 50 Section 5 - W7459 Economizer Module Table 1. Economizer Usage Model W7459A W7459B W7459C For use with Discharge Air Actuator Temperature Input M7415 C7510B or C7046A Sensor M7405A Direct digital control W7401/W7411 Logic Panel M8405 SPST control W7459Da M7415 a C7150B or C7046A Sensor Minimum Position Potentiometer Yes Terminals for Remote Minimum Output Damper Position Relays Yes 2 SPDT Yes Yes 1 SPDT No. Minimum position No adjustment is built into M8405 Actuator. Yes Yes 2 SPDT 2 SPDT W7459D has a high enthalpy limit and defaults to mechanical cooling when the outdoor enthalpy reaches the preset limit. Do not use a dry bulb sensor for a high temperature limit. 51 Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module W7459A, B, C and D ENTHALPY CHANGEOVER SETPOINT DIAL TR B SO A TR1 TRANSFORMER (POWER) TERMINALS + OUTSIDE AIR SENSOR TERMINALS + RETURN AIR SENSOR TERMINALS C B D SR A TR TR1 SO + SR + M3 3 2 1 M2 M1 P P1 C D 5 MININUM POSITION DIAL (W7459A AND D ONLY) LIGHT IS ILLUMINATED IF OUTDOOR AIR IS USEABLE FOR FREE COOLING 2 3 4 T T1 MIXED OR SUPPLY AIR SENSOR P P1 REMOTE MINIMUM POSITION POTENTIOMETER MINIMUM POSITION OPEN COOLING SWITCHING CONTROLLED FROM COOLING STAT 1 MINIMUM POSITION OPEN NOTE: USE SMALL SCREWDRIVERS ON THE POTENTIOMETERS. DO NOT USE EXCESSIVE FORCE! M23894 NOTE: USE SMALL SCREWDRIVERS ON THE POTENTIOMETERS. DO NOT USE EXCESSIVE FORCE! W7459A M23895 W7459A or D - Uses inputs from mixed or discharge air temperature sensors, C7150 or C7046; enthalpy sensor C7400; and optional remote minimum position potentiometer Q709A or S963B. The W7459D is identical to the W7459A except for the addition of a builtin enthalpy high limit. Refer to page 56 for more information on the high limit function. Use both modules with M7415 motors. W7459B W7459B - Used with Honeywell W7401 Logic Panel, enthalpy sensor C7400 or minimum position potentiometer Q709A or S963B. Use with M7405. B There are four separate W7459 enthalpy logic modules for use with various M74XX series actuators. All provide enthalpy control of mixed air. The W7459B is designed for use with a legacy Honeywell direct digital controller. The W7459C uses a SPST input for the mixed air sensor. A TR TR1 SO + SR + C D 5 1 2 3 4 X 6 D X TERMINAL IS USED WITH A ST6008 TIMER FOR OCCUPIED/ UNOCCUPIED MIXED AIR CONTROL (T675/T6031) CONNECTED TO TERMINALS 6 AND D NOTE: USE SMALL SCREWDRIVERS ON THE POTENTIOMETERS. DO NOT USE EXCESSIVE FORCE! M23896 W7459C W7459C - Uses input from SPST mixed or discharge air control and enthalpy sensor C7400. Used with M8405. 63-8594 Honeywell Economizers 52 Section 5 - W7459 Economizer Module M7215, M7415, M7405 and M8405 Actuators W7210, W7212, W7215 and W7340 economizer modules. They are widely used to modulate the mixed air dampers on smaller rooftop air handlers since the operating temperature rating is -25 to 125°F (-32 to 52°C). TR 24 VAC SENSOR M7215 modulating motor, with 2-10 Vdc input required. TR1 T T1 MIN POS P1 P M13856 M7415 W7459A M7215 modulating motor. Used with W7212, W7213 or W7214 only TR TR1 T T1 P1 P TR 24 VAC TR1 SENSOR T M23890 The M7415 line of spring return actuators are: • Low torque 25 lb-in. (2.8 N-m) • 90 second timing • Rotation of 90 degrees • Quick connect terminals for wiring connections There are more actuators available in this series than listed on this page. Only actuators shown on this page are used with the W7459, 53 T1 P1 MIN POSN P M23891 M7415 modulating motor, sensor input or controller required. Used with W7459A or D only. Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module T TR 24 VAC SW SET TR1 M3 W7401 MAX MIN M2 M1 MIN POS X D P1 P M23893 M23892 M7405 modulating motor. Used with W7459B and W7400/T7400 only. 63-8594 Honeywell Economizers 3 position actuator. Used with W7459C only. 54 Section 5 - W7459 Economizer Module W7459 Enthalpy Setpoint Chart 50 BTU/LB 116 k-J/kg 90 % 80 AT 25 BTU/LB RH 58 k-J/kg 5 20 BTU/LB A B 55 15 BTU/LB 34.8 kJ/kg C D 50 45 35 40 F( 27 60 % 69.7 k-J/kg 46.4 k-J/kg F( 16 F( 13 C F( 10 C) F( 7C ) 60 )W ET WE 4 C) WE BU TB F( WE UL 4C TB B F( ) WE UL 2C ) W B TB ET UL BU B LB ) WE % 80 RH 30 BTU/LB F( 29 C 70 SA T 81.4 k-J/kg F( 32 C) WE T RH UR 35 BTU/LB 85 % IO 92.8 k-J/kg RH N- 40 BTU/LB 90 10 0% 104.5 k-J/kg RH RH 45 BTU/LB HIGH LIMIT CURVE FOR W7459D, W6210D AND W7210D TB UL B 0% 0% 30 75 24 RH 70 RH % 65 RH 20% LB F( C) C) F( 21 C F( 18 WE TB U ) W ET WE H 10% R LB TB UL TB U WE C) BU BU TB U B LB LB LB LB 40 F 50 F 60 F 70 F 80 F 90 F 100 F 110 F 120 F 4 C 10 C 16 C 21 C 27 C 32 C 38 C 43 C 49 C 35 F 45 F 55 F 65 F 75 F 85 F 95 F 105 F 115 F 2 C 7 C 13 C 18 C 24 C 29 C 35 C 41 C 46 C DRY BULB TEMPERATURES M25283 This is the psychrometric chart for the setpoint on the W7459 enthalpy modules. It is similar to the charts for the H705 except for the enthalpy high limit line to the right of the A curve. This is a specialized limit used only in the W7459D, W6210D, W7210D and W7212 controllers. When the enthalpy of both the return and outside air is to the right of the limit line the outside air dampers are closed to the minimum position and the mechanical cooling is energized. 55 Control Point (Approximate Temperature Control Curve at 50% Humidity) A 73°F (23°C) B 70°F (21°C) C 67°F (19°C) D 63°F (17°C) Knob turned For Differential Enthalpy to D (2 Sensor) Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module High Limit Switching Table 2. W7459D, W7210D and W7212 High Limit Switching. Percent RH 25 50 60 75 Free Cooling Light on Enthalpy Decreasing 83°F ±0.5°F (28°C ±0.3°C) 78°F ±0.5°F (26°C ±0.3°C) 76°F ±0.5°F (24°C ±0.3°C) 73°F ±0.5°F (23°C ±0.3°C) The W7459D, W6210D, W7210D, and W7212 include the high limit function that is not used on any other economizer modules. It is a high enthalpy limit that applies to both return and outside air. It only applies to differential, not single enthalpy. When the return and outside enthalpy both exceed the high limit curve, (refer to the psychrometric chart on the previous page) the outside air dampers are closed to the minimum position and the mechanical cooling is energized. In a standard differential enthalpy control sequence the lower of the outside and return is selected regardless of the amount of enthalpy in either. 63-8594 Honeywell Economizers 56 Free Cooling Light Off Enthalpy Increasing 85°F ±0.5°F (29°C ±0.3°C) 80°F ±0.5°F (27°C ±0.3°C) 78°F ±0.5°F (26°C ±0.3°C) 75°F ±0.5°F (24°C ±0.3°C) A typical application of this limit function is a building located in a warm, humid climate with a high internal heat gain such as a laundry or kitchen. A standard differential enthalpy control circuit may have extremely warm, humid outside air being cooled just because the indoor air is temporarily higher in enthalpy. The mechanical cooling equipment might be undersized and the indoor enthalpy then remains higher than outside. The high limit function (only available on some economizer modules) prevents this from occurring by automatically switching to return air and turning on the mechanical cooling during very high outdoor air enthalpy conditions. Section 5 - W7459 Economizer Module W7459A Wiring Diagram W7459A ECONOMIZER MODULE C7400 OURDOOR AIR ENTHALPY SENSOR M7415 ACTUATOR TR TR TR1 24 VAC 1 + S SO + TR1 SR + S RELAYS 1K AND 2K ENERGIZE IF OUTDOOR ENTHALPY EXCEEDS RETURN AIR ENTHALPY C7400 RETURN AIR ENTHALPY SENSOR 1S 1 + 5 T 2 MIXED AIR SENSOR 1K 1S SWITCHES WHEN POWERED BY 24 VOLTS 2K 1S1 3 4 T T1 T1 P1 MINIMUM POSITION P P P1 MINIMUM POSITION ADJUSTMENT C7150 OR C7046 MIXED OR SUPPLY AIR SENSOR LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) HVAC EQUIPMENT TERMINAL STRIP TRANSFORMER 1 R F 110 120 100 Y1 W 130 140 90 15 80 16 70 C 170 60 180 Y2 W2 Y1 COOL1 Y2 COOL2 W2 HEAT 2 W1 HEAT 1 W1 G FAN DELAY G RH FAN FDR R RC COMMERCIAL THERMOSTAT 1 HONEYWELL RECOMMENDS USE OF A SINGLE LARGE TRANSFORMER FOR BOTH THE ECONOMIZER LOGIC MODULE AND THE COOLING COMMERCIAL THERMOSTAT CIRCUIT. 57 M13819 Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module W7459C ECONOMIZER PACKAGE M8405 ACTUATOR M8405 T APPLY 24VAC T-X FOR MIN POSN T-D FOR MAX POSN T MAX SW SET MIN + C7400 OUTDOOR SENSOR TR TR1 SO + SR + S X D C7400 RETURN SENSOR 5 S 5 + 1K UNOCCUPIED 1 2 3 4 4 2K ST6008 TIMER OCCUPIED T675/T6031 MIXED AIR CONTROL 55¡ F SETPOINT R 6 X X D D W C Y1 COOL 1 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 Y1 W Y2 R T6031 AMBIENT LOCKOUT CONTROL 50¡ F SETPOINT FAN DELAY RELAY X 6 FDR G G RH FAN FDR 2 R RC 1 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP T7300 OR T874 THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 MOTOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 5 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 6 FOR T7300 ONLY. M8405A Damper Actuator used in two-stage cooling system with differential enthalpy changeover and W7459C Economizer 63-8594 Honeywell Economizers 58 M3865B Section 5 - W7459 Economizer Module W7459A ECONOMIZER PACKAGE M7415 ACTUATOR TR C7400 OUTDOOR + AIR ENTHALPY S SENSOR 620 OHM RESISTOR TR TR1 SO + SR + TR1 24 VAC 6 5 1K 1 2 3 4 5 1S 2K 4 T C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR UNOCCUPIED 8 ST6008 TIMER T T1 P P1 T1 1S1 P1 MINIMUM POSITION ADJUSTMENT OCCUPIED MIXED AIR SENSOR P MINIMUM POSITION C Y1 W Y2 R M7415 TR COOL 1 Y1 T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT 24 VAC COOL 2 Y2 SENSOR TR1 T T1 W2 W2 HEAT 2 W1 W1 HEAT 1 P1 MIN POS P FAN DELAY RELAY G 7 X FDR G FAN 1 3 RH FDR L2 2 R RC L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP T7300 OR T874 THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 MOTOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 WITH T7300, USE CONTACTS A1 AND A2 INSTEAD OF S7005 TIMER. M10115A W7459A/C7400 used in two-stage cooling system with single enthalpy changeover and with M7415 Actuator 59 Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module W7459A ECONOMIZER PACKAGE M7415 ACTUATOR TR + C7400 ENTHALPY SENSOR S 620 OHM RESISTOR TR TR1 SO + SR + TR1 24 VAC 5 6 1K C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1 2 3 4 1S 2K T T1 P P1 T1 1S1 MIXED AIR SENSOR P1 MINIMUM POSITION ADJUSTMENT ST6008 TIMER Y1 4 T UNOCCUPIED 8 OCCUPIED 5 P MINIMUM POSITION C M7415 TR COOL 1 Y1 24 VAC SENSOR TR1 T T1 W2 W2 HEAT 2 W1 W1 HEAT 1 MIN POS P1 P FAN DELAY RELAY G FDR 7 X G FAN FDR RC T7300 OR T874 THERMOSTAT 2 R 1 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 MOTOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE STAGE COOLING THERMOSTAT. 7 FOR T7300 ONLY. 8 WITH T7300, USE CONTACTS A1 AND A2 INSTEAD OF A TIMER. M10114A W7459A/C7400 or W7459D/C7400 used in one-stage cooling system with single enthalpy changeover, M7415 Actuator, and one-stage cooling thermostat 63-8594 Honeywell Economizers 60 Section 5 - W7459 Economizer Module W7459A ECONOMIZER PACKAGE M7415 ACTUATOR TR C7400 + OUTDOOR AIR ENTHALPY S SENSOR 620 OHM RESISTOR TR TR1 SO + SR + TR1 24 VAC 6 5 1K 1 2 3 4 T T1 P P1 5 1S 2K 4 T C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR UNOCCUPIED ST6008 TIMER 1S1 P1 MINIMUM POSITION ADJUSTMENT OCCUPIED R T775 CONTROLLER T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT MINIMUM POSITION P C W MIXED AIR SENSOR T1 M7415 Y1 COOL 1 Y2 COOL 2 TR 24 VAC SENSOR TR1 T T1 P1 MIN POS P 7 NC COM NO NC COM NO 2 G NO COM NC FAN 3 L2 1 L1 (HOT) R HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 MOTOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH, WHICH CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. A MAXIMUM OF ONE STAGE OF HEATING IS POSSIBLE WHEN THE SYSTEM IS WIRED IN THIS FASHION. M11680A W7459A/C7400 or W7459D/C7400 used in two-stage cooling system with single enthalpy changeover, M7415 Actuator, and T775 Series 1000 Controller 61 Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module W7459A ECONOMIZER PACKAGE M7415 ACTUATOR TR C7400 OUTDOOR AIR ENTHALPY SENSOR TR TR1 SO + SR + TR1 24 VAC + S 620 OHM RESISTOR 6 5 1K 1 2 3 4 T T1 P P1 5 1S 2K 4 T C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR UNOCCUPIED ST6008 TIMER T1 1S1 P1 MINIMUM POSITION ADJUSTMENT OCCUPIED Y1 W R T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT Y2 M7415 COOL 1 COOL 2 TR 24 VAC SENSOR T P1 MIN POS + P 2 NC C NO NC C NO TR1 T1 7 C MINIMUM POSITION P C T775 CONTROLLER MIXED AIR SENSOR G FAN 3 L2 NO C NC NO C NC R 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 MOTOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH, WHICH CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. M13843 W7459A/C7400 or W7459D/C7400 used in two-stage cooling system with single enthalpy changeover, M7415 Actuator, and T775 Series 2000 Controller 63-8594 Honeywell Economizers 62 Section 5 - W7459 Economizer Module W7459A ECONOMIZER PACKAGE M7415 ACTUATOR TR C7400 OUTDOOR + AIR ENTHALPY S SENSOR 6 C7400 + RETURN AIR ENTHALPY S SENSOR TR TR1 SO + SR + 24 VAC TR1 5 1K 1 2 3 4 5 1S 2K 4 T C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR T T1 P P1 T1 1S1 P1 MINIMUM POSITION ADJUSTMENT UNOCCUPIED 8 MIXED AIR SENSOR P MINIMUM POSITION ST6008 TIMER OCCUPIED C Y1 W Y2 R COOL 1 Y1 T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT Y2 W2 W2 HEAT 2 W1 W1 HEAT 1 7 FAN DELAY RELAY X G FDR G RH FAN FDR 2 R RC T7300 OR T874 THERMOSTAT 1 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 MOTOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE OUTDOOR AIR ENTHALPY IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 M3864B WITH T7300, USE CONTACTS A1 AND A2 INSTEAD OF A TIMER. W7459A/C7400 or W7459D/C7400 used in one-stage cooling system with differential enthalpy changeover and M7415 Actuator 63 Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module W7459A ECONOMIZER PACKAGE M7415 ACTUATOR TR + C7400 ENTHALPY SENSOR S 620 OHM RESISTOR TR TR1 SO + SR + 24 VAC TR1 7 5 3K RELAY 1K 6 1 2 3 4 5 1S 2K 4 T C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR T T1 P P1 MIXED AIR SENSOR T1 1S1 P1 MINIMUM POSITION ADJUSTMENT P MINIMUM POSITION T7400/W7400 SYSTEM T7400 THERMOSTAT WALLPLATE OR Q7400 SUBBASE C T6031 LOCKOUT 50 F SETPOINT 6 W7400 CONTROL MODULE 4 1 3 2 R 1 3K1 Y1 COOL 1 Y2 COOL 2 W1 HEAT 2 W2 HEAT 1 W RC GND T7400B ONLY; T7047C1025 OR T7022A1010 REMOTE SENSOR TR Y1 Y2 TR R 24 VAC RH RH RC W1 W2 FAN DELAY RELAY 4 RC 3 2 G T7400 FDR 2 A COM B FAN G 1 ECONO. AUX RELAY 3K2 ENTHALPY SWITCH R 6 HVAC EQUIPMENT TERMINAL STRIP 5 6 L1 L2 (HOT) 1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 MOTOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 USE R8222N WITH PILOT DUTY CONTACTS FOR 3K. CONTACTS 3K1, 3K2 MAKE WHEN ENTHALPY IS BELOW SETPOINT AND ECONOMIZER IS USED FOR FIRST STAGE OF COOLING. 7 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 3 M10117A W7459A/C7400 or W7459D/C7400 used in T7400/W7400 System with M7415 Actuator 63-8594 Honeywell Economizers 64 Section 5 - W7459 Economizer Module W7459B ECONOMIZER PACKAGE M7405 ACTUATOR TR M7405 TR 24 VAC TR1 M3 W7401 M2 M1 MIN POS TR TR1 SO + SR + M3 3 2 1 TR1 24 VAC + C7400 ENTHALPY SENSOR S P1 P 2 620 OHM RESISTOR M3 3 1K M2 M2 M1 P P1 M1 P1 MINIMUM POSITION ADJUSTMENT P MINIMUM POSITION 24 VAC TR T7400 PROGRAMABLE THERMOSTAT 1 2 RH 1 RC L1 (HOT) L2 1 TR C G G FDR 2 3 3 4 4 C7046A DISCHARGE AIR LOW LIMIT SENSOR R T FAN FDR FAN DELAY RELAY W1 W1 HEAT 1 W2 W2 HEAT 2 Y1 Y1 COOL 1 Y2 Y2 COOL 2 T1 5 6 M3 M2 M1 W7401 LOGIC HVAC EQUIPMENT PANEL TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 3 RELAY 1K ACTUATES WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. M3863 W7459B/C7400 used in two-stage cooling system with single enthalpy changeover, and M7405 Actuator 65 Honeywell Economizers 63-8594 Section 5 - W7459 Economizer Module 63-8594 Honeywell Economizers 66 Section 6 - W6210 And W7210 Economizer Modules Section 6 - W6210 And W7210 Economizer Modules 67 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W7210 Economizer System Components DAMPER EXHAUST AIR + S RETURN AIR SENSOR RETURN AIR FROM ROOM OUTSIDE AIR SENSOR SUPPLY AIR TO BUILDING + S FAN DISHCHARGE AIR SENSOR COILS 24 VAC HOT W7210 A 1001 24 VAC COM W7210 SOLID STATE ECONOMIZER LOGIC MODULE + 2-10V OUT – T7350 PROGRAMMABLE THERMOSTAT 63-8594 Honeywell Economizers M23902 68 Section 6 - W6210 And W7210 Economizer Modules W6210 and W7210 Components SINGLE ENTHALPY SETPOINT 24 VAC HOT 24 VAC TR HOT B C 24 VAC COM W7210 A 1001 ACTUATOR POWER SUPPLY TERMINALS A + ACTUATOR TERMINALS TR COM1 24 VAC POWER TERMINALS SO + OUTSIDE AIR ENTALPY SENSOR D SR + RETURN AIR ENTHALPY SENSOR 5 COOLING SWITCHING CONTROLLED FROM COOLING STAT MINIMUM POSITION 2-10V OUT 1 2 3 4 T T1 P P1 OPEN – MINIMUM DAMPER POSITION SETPOINT MIXED AIR SENSOR REMOTE MINIMUM POSITION POTENTIOMETER FREE COOLING FREE COOLING MODE LIGHT M23897 The W7210 logic modules have the identical functions as the W7459 modules with the addition of a 2-10 Vdc output for use with M7215 foot-mounted actuators or DCA’s and Modutrol Motors with 2-10 Vdc control. The mixed air control circuit is in the logic module and no longer in the actuator. The actuator can also be powered with the same 24 Vac power as the logic modules provided the internal grounding of the actuator is compatible. Note some of the Siemens actuators are not compatible with the M7210. Older models that are no longer available are the W6210A and D models. These models were used in the mid 1990’s with floating actuators. Since the floating actuators do not provide as accurate control as the modulating actuators, these logic modules have been discontinued. High Limit Function There are high limit versions of these economizer logic modules, W6210D and W7210D. When in the differential enthalpy 69 mode and both the return and outside air enthalpy are above a preset level, the outside air dampers are returned to minimum position and the mechanical cooling is energized. The curve for this limit function is illustrated on the psychrometric chart as the line to the right of the A curve. Refer to page 55 of this guide for more information. Wiring Connections There are many possible wiring diagrams and combinations of controllers and actuators that can be used with the logic modules. Once you understand the input and output of the modules, you can usually determine how a system should be wired. NOTE: Many user systems are wired to bypass operations and to “trick” the module into operating in a mode that it was not designed to do, these are the applications which may confuse you. When is doubt, call the unit supplier or refer to the product instructions for wiring diagrams. Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W6210 and W7210 Actuator Connections PARALLEL ML7275, ML7285 ACTUATORS 90 60 30 30 500 0 60 90 60 60 30 24 VAC HOT 90 30 30 500 60 30 500 0 500 60 W7210 OR W7215 ECONOMIZER MODULE 0 W7210 OR W7215 ECONOMIZER MODULE 24 VAC HOT 500 SINGLE ML7275, ML7285 ACTUATOR 24 VAC COM 500 24 VAC COM RED BLACK WHITE + + 2-10V OUT RED 2-10V OUT RED BLACK BLACK WHITE _ _ WHITE M13824 SINGLE 90 ACTUATOR 60 90 W7210 OR W7215 ECONOMIZER MODULE 60 30 30 500 24 VAC HOT 0 500 24 VAC COM RESISTORS ARE 1/2 WATT, 1% AND ARE INCLUDED IN THE KIT PART NO. 4074EJM. MULTIPLE SERIES 90 ACTUATORS CANNOT BE PARALLELED WITH THESE RESISTORS. FOR MODUTROL IV SERIES 90 ACTUATORS USE THE Q7230 INTERFACE MODULE. 536 OHM 3480 OHM BLACK + YELLOW 2-10V OUT RED 665 OHM _ BLUE M13826 W7210 OR W7215 ECONOMIZER MODULE M7415 ACTUATOR L2 L1 TR 24 VAC TR1 24 VAC HOT 24 VAC COM SENSOR T 1 T1 P1 MIN POSN P < + _ Q769C MINIMUM POSITION POTENTIOMETER 1 + 2-10V OUT _ WHEN USING THE W7210 OR W7215 WITH A M7415 ACTUATOR, THE MIXED OR DISCHARGE AIR SENSOR MUST BE CONNECTED TO THE LOGIC MODULE AND NOT THE ACTUATOR. M13827 63-8594 Honeywell Economizers 70 Section 6 - W6210 And W7210 Economizer Modules SINGLE ML6285 ACTUATOR 60 30 90 W6210 ECONOMIZER MODULE BLACK 24 VAC HOT 30 500 BLACK BLACK 60 0 60 60 90 500 ORANGE TAN 0 RED 24 VAC COM CLOSE OUT YELLOW CLOSE OUT OPEN OUT BLUE OPEN OUT OPEN ORANGE 500 BLUE 24 VAC HOT 30 0 500 YELLOW 60 30 500 24 VAC COM 90 60 30 30 500 RED W6210 ECONOMIZER MODULE PARALLEL ML6285 ACTUATORS OPEN TAN WIPER WIPER RED GREEN YELLOW CLOSED GREEN CLOSED BLUE M13825 W7210 OR W7215 ECONOMIZER MODULE SINGLE ML7295H ACTUATOR W7210 OR W7215 ECONOMIZER MODULE PARALLEL ML7925H ACTUATORS 24 VAC HOT 24 VAC HOT 24 VAC COM 24 VAC COM RED BLACK GRAY + + 2-10V OUT 2-10V OUT RED BLACK _ RED _ BLACK GRAY GRAY ML7295H setting for closed at 2 Vdc and open at 10 Vdc Startpoint—Labeled U0 2 Vdc Actuator fully closed Range—Labelled ΔU 8 Vdc Actuator fully open M13828 ML7295H These are settings for a ML7295H used with a W7210 or W7215. The ML7295H is equipped with an input signal span and startpoint adjustment. The startpoint, labeled U0, determines which voltage the control signal begins to reposition the actuator. The span, labelled ΔU, determines which voltage the actuator is at full position. 71 SPAN, Δ U 5 10 2 15 20 CONTROL SIGNAL VOLTAGE SPAN DIAL (ADJUSTABLE FROM 2 TO 30 VDC) OFFSET, U0 1 0 2 3 5 4 VOLTAGE STARTING DIAL (ADJUSTABLE FROM 0 TO 5 VDC) 30 25 M13829 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W7210 Wiring Diagrams W7210 ECONOMIZER MODULE Q7230 V+ 1+ COM F T2 T1 SERIES 90 MODUTROL IV MOTORS 24 VAC HOT 1 2 3 4 5 6 7 8 + SR RELAYS 1K AND 2K ENERGIZE IF OUTDOOR ENTHALPY EXCEEDS RETURN AIR ENTHALPY + 5 1S 1 2 3 4 T T1 P P1 S + 2-10V OUT 1 2 3 4 5 6 7 8 COM F T2 T1 SO C7400 OUTDOOR AIR ENTHALPY SENSOR + _ 1+ TR1 24 VAC COM Q7230 V+ TR 620 OHM RESISTOR 1K 1S SWITCHES WHEN POWERED BY 24 VOLTS 2K MIXED AIR 1S1 CIRCUITRY C7150 OR C7046 MIXED OR SUPPLY AIR SENSOR MINIMUM POSITION ADJUSTMENT LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) HVAC EQUIPMENT TERMINAL STRIP TRANSFORMER R F 110 120 Y1 W 130 100 1 140 90 15 80 16 70 170 60 180 Y2 C W2 Y1 COOL1 Y2 COOL2 W2 HEAT 2 W1 HEAT 1 W1 G FAN DELAY RH G FAN FDR RC R COMMERCIAL THERMOSTAT 1 63-8594 Honeywell Economizers HONEYWELL RECOMMENDS USE OF A SINGLE LARGE TRANSFORMER FOR BOTH THE ECONOMIZER LOGIC MODULE AND THE COOLING COMMERCIAL THERMOSTAT CIRCUIT. M13820 72 Section 6 - W6210 And W7210 Economizer Modules W6210A,D 24 VAC HOT + C7400 ENTHALPY SENSOR S TR TR1 SO + CLOSE OPEN SR 620 OHM RESISTOR HONEYWELL SERIES 62 ACTUATOR (ML6275, ML6285, M6275, M6285) 24 VAC COM + 5 6 1K 1 2 3 4 T T1 5 OPEN 1S WIPER C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR P 2K 4 CLOSED 9 1S1 P1 UNOCCUPIED MINIMUM POSITION ADJUSTMENT ST6008 TIMER OCCUPIED 500 OHM 8 C Y1 Y1 COOL 1 W2 W2 HEAT 2 W1 W1 HEAT 1 FAN DELAY RELAY G FDR 7 X G FAN FDR RC T7300 OR T874 THERMOSTAT 2 R 1 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE STAGE COOLING THERMOSTAT. 7 8 FOR T7300 ONLY. FOR T7300, USE CONTACTS A 1AND A 2INSTEAD OF THE TIMER. 9 THE COMMON FOR THE W6210A,D IS DIFFERENT FROM THE COMMON (WIPER) FOR THE SERIES 62 ACTUATORS. BE SURE TO CONNECT EACH ONE TO A DIFFERENT CIRCUIT. M11151B W6210A,D used in single-stage cooling system with single enthalpy changeover and Honeywell Series 62 Actuator 73 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W7210A,D 24 VAC HOT + C7400 ENTHALPY SENSOR S 620 OHM RESISTOR TR TR1 SO + SR + HONEYWELL SERIES 72 ACTUATOR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) 9 5 6 1K C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR UNOCCUPIED 1 2 3 4 T T1 P P1 5 1S 2K 2-10V OUT 1S1 8 – MINIMUM POSITION ADJUSTMENT ST6008 TIMER OCCUPIED + + 4 C Y1 Y1 COOL 1 W2 W2 HEAT 2 W1 W1 HEAT 1 FAN DELAY RELAY G FDR 7 X G FAN FDR RC T7300 OR T874 THERMOSTAT 2 R 1 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE STAGE COOLING THERMOSTAT. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A 1AND A 2INSTEAD OF THE TIMER. 9 FOR THE ML7295A,C USE THE 4-20 MA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE, WHICH ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. M11152A W7210A,D used in single-stage cooling system with single enthalpy changeover and Honeywell Series 72 Actuator 63-8594 Honeywell Economizers 74 Section 6 - W6210 And W7210 Economizer Modules W6210A,D 24 VAC HOT C7400 OUTDOOR AIR ENTHALPY SENSOR + C7400 RETURN AIR ENTHALPY SENSOR + TR TR1 24 VAC COM SO + CLOSE S HONEYWELL SERIES 62 ACTUATOR OPEN SR 6 + 5 1K S 1 2 3 4 T T1 P P1 5 OPEN 1S WIPER C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR UNOCCUPIED 2K 4 CLOSED 1S1 8 MINIMUM POSITION ADJUSTMENT ST6008 TIMER OCCUPIED 9 C Y1 W Y2 R COOL 1 Y1 T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT Y2 W2 W2 HEAT 2 W1 W1 HEAT 1 FAN DELAY RELAY G 7 X FDR G RH FAN FDR 2 R RC T7300 OR T874 THERMOSTAT 500 OHM 1 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE OUTDOOR AIR ENTHALPY IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A 1AND A 2INSTEAD OF THE TIMER. 9 THE COMMON FOR THE W6210A,D IS DIFFERENT FROM THE COMMON (WIPER) FOR THE SERIES 62 ACTUATORS. BE SURE TO CONNECT EACH ONE TO A DIFFERENT CIRCUIT. M11157C W6210A,D used in single-stage cooling system with differential enthalpy changeover and Honeywell Series 62 Actuator 75 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W7210A,D 24 VAC HOT + C7400 ENTHALPY SENSOR TR TR1 SO + SR + HONEYWELL SERIES 72 ACTUATOR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) 8 S 620 OHM RESISTOR 7 5 3K RELAY 1K 6 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1 2 3 4 T T1 P P1 5 1S 2K + + 4 2-10V OUT 1S1 – MINIMUM POSITION ADJUSTMENT T7400/W7400 SYSTEM T7400 THERMOSTAT WALLPLATE OR Q7400 SUBBASE 4 1 3 2 R C T6031 LOCKOUT 6 50°F SETPOINT W7400 CONTROL MODULE 1 3K1 Y1 COOL 1 Y2 COOL 2 W1 HEAT 2 W2 HEAT 1 W RC GND T7400B ONLY; T7047C1025 OR T7022A1010 REMOTE SENSOR Y1 TR R Y2 TR 24 VAC RH RH W1 RC W2 4 FAN DELAY RELAY G RC 3 2 T7400 FDR G 1 A COM B FAN 2 ECONO. AUX ENTHALPY RELAY SWITCH 3K2 R 6 5 6 HVAC EQUIPMENT TERMINAL STRIP L1 L2 (HOT) 1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 USE R8222N WITH PILOT DUTY CONTACTS FOR 3K. CONTACTS 3K1, 3K2 MAKE WHEN ENTHALPY IS BELOW SETPOINT AND ECONOMIZER IS USED FOR FIRST STAGE OF COOLING. 7 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 3 M11156A W7210A,D used with T7400/W7400 System and Honeywell Series 72 Actuator 63-8594 Honeywell Economizers 76 Section 6 - W6210 And W7210 Economizer Modules W6210A,D 24 VAC HOT C7400 OUTDOOR AIR ENTHALPY SENSOR TR TR1 SO + HONEYWELL SERIES 62 ACTUATOR 24 VAC COM + S OPEN SR 620 OHM RESISTOR (ML6275, ML6285, M6275, M6285) CLOSE + 6 5 1K 1 2 3 4 T T1 5 1S 2K 4 OPEN C7150B MIXED AIR OR C7046A UNOCCUPIED DISCHARGE ST6008 AIR SENSOR TIMER P WIPER 1S1 CLOSED P1 8 MINIMUM POSITION ADJUSTMENT OCCUPIED 500 OHM 9 C Y1 COOL 1 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 Y1 Y2 W R T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT FAN DELAY RELAY G 7 X FDR G FAN RH FDR 2 R RC 1 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP T7300 OR T874 THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. 9 THE COMMON FOR THE W6210A,D IS DIFFERENT FROM THE COMMON (WIPER) FOR THE SERIES 62 ACTUATORS. BE SURE TO CONNECT EACH ONE TO A DIFFERENT CIRCUIT. M11153C W6210A,D used in two-stage cooling system with single enthalpy changeover and Honeywell Series 62 Actuator 77 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W7210A,D 24 VAC HOT C7400 OUTDOOR AIR ENTHALPY SENSOR TR TR1 SO + SR + HONEYWELL SERIES 72 ACTUATOR 24 VAC COM + (ML7275, ML7285, ML7295A,C M7275, M7285) S 620 OHM RESISTOR 9 6 5 1K C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 8 UNOCCUPIED ST6008 TIMER 1 2 3 4 T T1 P P1 5 1S 2K + + 4 2-10V OUT 1S1 – MINIMUM POSITION ADJUSTMENT OCCUPIED C Y1 COOL 1 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 Y1 W Y2 R T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT FAN DELAY RELAY G 7 X FDR G FAN 1 RH FDR 2 R RC T7300 OR T874 THERMOSTAT 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. 9 FOR THE ML7295A,C USE THE 4-20 MA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE, WHICH ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. W7210A,D used in two-stage cooling system with single enthalpy changeover and Honeywell Series 72 Actuator 63-8594 Honeywell Economizers 78 M11154B Section 6 - W6210 And W7210 Economizer Modules W7210A,D 24 VAC HOT C7400 OUTDOOR AIR ENTHALPY SENSOR + C7400 RETURN AIR ENTHALPY SENSOR + TR TR1 SO + SR + HONEYWELL SERIES 72 ACTUATOR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) 9 S 6 5 1K S C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR UNOCCUPIED 1 2 3 4 T T1 P P1 5 1S 2K 2-10V OUT 1S1 8 – MINIMUM POSITION ADJUSTMENT ST6008 TIMER OCCUPIED C Y1 W Y2 R COOL 1 Y1 T6031 AMBIENT LOCKOUT CONTROL 50°F SETPOINT Y2 W2 W2 HEAT 2 W1 W1 HEAT 1 FAN DELAY RELAY G 7 FDR X G RH FAN FDR 2 R RC T7300 OR T874 THERMOSTAT + + 4 1 3 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE OUTDOOR AIR ENTHALPY IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 9 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. FOR THE ML7295A,C USE THE 4-20 MA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE, WHICH ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. M11158A W7210A,D used in single-stage cooling system with differential enthalpy changeover and Honeywell Series 72 Actuator 79 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W6210A,D 24 VAC HOT TR TR1 SO + + C7400 ENTHALPY SENSOR HONEYWELL SERIES 62 ACTUATOR 24 VAC COM CLOSE (ML6275, ML6285, M6275, M6285) OPEN S 620 OHM RESISTOR + SR 7 5 3K RELAY 1K 6 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1 2 3 4 T T1 5 1S 2K 4 OPEN WIPER 1S1 P 500 OHM CLOSED P1 MINIMUM POSITION ADJUSTMENT 8 T7400/W7400 SYSTEM T7400 THERMOSTAT WALLPLATE OR Q7400 SUBBASE C T6031 LOCKOUT 6 50°F SETPOINT W7400 CONTROL MODULE 4 1 3 2 R 1 3K1 Y1 COOL 1 Y2 COOL 2 W1 HEAT 2 W2 HEAT 1 W RC GND T7400B ONLY; T7047C1025 OR T7022A1010 REMOTE SENSOR TR Y1 R Y2 TR 24 VAC RH RH RC W1 W2 4 RC FAN DELAY RELAY G 3 2 T7400 FDR G 1 A COM B FAN 2 ECONO. AUX ENTHALPY RELAY SWITCH 3K2 R 6 5 6 HVAC EQUIPMENT TERMINAL STRIP L1 L2 (HOT) 1 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 USE R8222N WITH PILOT DUTY CONTACTS FOR 3K. CONTACTS 3K1, 3K2 MAKE WHEN ENTHALPY IS BELOW SETPOINT AND ECONOMIZER IS USED FOR FIRST STAGE OF COOLING. 7 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 8 THE COMMON FOR THE W6210A,D IS DIFFERENT FROM THE COMMON (WIPER) FOR THE SERIES 62 ACTUATORS. BE SURE TO CONNECT EACH ONE TO A DIFFERENT CIRCUIT. 3 M11155C W6210A,D used with T7400/W7400 System and Honeywell Series 62 Actuator 63-8594 Honeywell Economizers 80 Section 6 - W6210 And W7210 Economizer Modules W7210A,D 24 VAC HOT C7400 + OUTDOOR AIR ENTHALPY S SENSOR 620 OHM RESISTOR TR TR1 SO + SR + HONEYWELL SERIES 72 ACTUATOR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285)8 6 5 1K C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR ST6008 TIMER UNOCCUPIED 1 2 3 4 T T1 P P1 5 1S 2K + 4 + 2-10V OUT 1S1 – MINIMUM POSITION ADJUSTMENT OCCUPIED C W R T775 CONTROLLER T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT Y1 COOL 1 Y2 COOL 2 G FAN 7 NC COM NO NC COM NO 2 NO COM NC 3 L2 R 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED FOR THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH, WHICH CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. A MAXIMUM OF ONE STAGE OF HEATING IS POSSIBLE WHEN THE SYSTEM IS WIRED IN THIS FASHION. 8 FOR THE ML7295A,C USE THE 4-20 MA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE, WHICH ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. M15298A W7210A,D used with T775 Series 1000 Controller and Honeywell Series 72 Actuator 81 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W7210A,D 24 VAC HOT C7400 OUTDOOR AIR ENTHALPY SENSOR TR TR1 SO + SR + HONEYWELL SERIES 72 ACTUATOR 24 VAC COM + (ML7275, ML7285, ML7295A,C M7275, M7285) S 620 OHM RESISTOR 8 6 5 1K UNOCCUPIED ST6008 TIMER C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1 2 3 4 T T1 P P1 1S 2K + 4 + 2-10V OUT 1S1 – MINIMUM POSITION ADJUSTMENT OCCUPIED C W T775 CONTROLLER R 7 C 5 T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT Y1 COOL 1 Y2 COOL 2 G FAN + 2 NC C NO NC C NO 3 L2 NO C NC NO C NC R 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED FOR THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH, WHICH CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY IF A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. 8 FOR THE ML7295A,C USE THE 4-20 MA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE, WHICH ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. M13844 W7210A,D used with T775 Series 2000 Controller and Honeywell Series 72 Actuator 63-8594 Honeywell Economizers 82 Section 6 - W6210 And W7210 Economizer Modules W7210A,D 24 VAC HOT + C7400 ENTHALPY SENSOR S 620 OHM RESISTOR TR TR1 SO + SR + 24 VAC COM SERIES 72 MODUTROL MOTOR 5 6 1K 1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR UNOCCUPIED 5 2 3 4 T T1 P P1 T1 1 T2 3 1S 2K + + 2-10V OUT – 4 1S1 8 SERIES 72 MODUTROL MOTOR – MINIMUM POSITION ADJUSTMENT ST6008 TIMER T1 T2 OCCUPIED C + Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 – G RH FDR G RC FAN FDR 7 2 R X T7300 OR T874 THERMOSTAT L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE LOAD OF ALL ACTUATORS. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE STAGE COOLING THERMOSTAT. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A 2 INSTEAD OF THE TIMER. M15300 W7210A,D controlling parallel wired Honeywell Series 72 Modutrol™ Motors 83 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules W7210A,D 24 VAC HOT TR + C7400 ENTHALPY SENSOR S 620 OHM RESISTOR TR1 SO + SR + 24 VAC COM 3 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR T T1 P P1 1S 2K 4 3 P1 P M7415 + TR1 + P1 – P M7415 2-10V OUT 1S1 8 – MINIMUM POSITION ADJUSTMENT ST6008 TIMER OCCUPIED TR1 – Q769C 5 2 4 1 TR 1K 1 TR + 5 6 UNOCCUPIED Q769C C Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 G RH FDR G RC FAN FDR 7 2 R X T7300 OR T874 THERMOSTAT L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE LOAD OF ALL ACTUATORS. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE STAGE COOLING THERMOSTAT. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. M15301 W7210A,D controlling parallel wired M7415 Economizer Motors 63-8594 Honeywell Economizers 84 Section 6 - W6210 And W7210 Economizer Modules 24 VAC HOT TR + C7400 ENTHALPY SENSOR S 620 OHM RESISTOR TR1 1 BLACK 3 WHITE SO + SR + BROWN ML7285 5 6 RED 1K 1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR UNOCCUPIED RED 24 VAC COM 5 BLACK 2 3 4 T T1 P P1 1S WHITE 2K 4 2-10V OUT 1S1 – 8 MINIMUM POSITION ADJUSTMENT ST6008 TIMER OCCUPIED BROWN + C Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 G RH FDR G RC FAN FDR 7 2 R X T7300 OR T874 THERMOSTAT L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE LOAD OF ALL ACTUATORS. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 RELAYS 1K AND 2K ACTUATE WHEN THE ENTHALPY SENSED BY THE C7400 IS HIGHER THAN THE ENTHALPY SETPOINT A-D. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE STAGE COOLING THERMOSTAT. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. M15299 W7210A,D controlling parallel wired Honeywell Series 72 Direct Coupled Actuators 85 Honeywell Economizers 63-8594 Section 6 - W6210 And W7210 Economizer Modules 63-8594 Honeywell Economizers 86 Section 7 - W6215, W7215 And W7460 Economizer Modules Section 7 - W6215, W7215 And W7460 Economizer Modules WITH AIR CONTENT SENSOR INPUTS 87 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215 System Components DAMPER EXHAUST AIR + S RETURN AIR SENSOR RETURN AIR FROM ROOM OUTSIDE AIR SENSOR SUPPLY AIR TO BUILDING + S FAN MIXED AIR COILS SENSOR W7215 ECONOMIZER LOGIC MODULE – T7350 PROGRAMMABLE THERMOSTAT W7215B + C7632 ROOM CARBON DIOXIDE SENSOR M23903 63-8594 Honeywell Economizers 88 Section 7 - W6215, W7215 And W7460 Economizer Modules W6215, W7215 and W7460 Components FREE COOLING MODE LIGHT MINIMUM DAMPER POSITION SETPOINT SINGLE ENTHALPY SETPOINT 24VAC TR Hot B C 24VAC Hot ACTUATOR POWER SUPPLY TERMINALS 24VAC Com A TR1 Com D So Sr + OUTSIDE AIR ENTHALPY SENSOR + RETURN AIR ENTHALPY SENSOR 5 1 + 2-10V OUT – CONTACT OUTPUTS 2 Mininum Position 3 4 T T1 P P1 Open W7215A ACTUATOR CONTROL TERMINALS Free Cool Maximum Position Free Cool Q Closed 6V AQ + Exhaust Fan Q1 AQ1 – 10V ISI Set Pt SD SD1 AC AC1 50% PG PG1 2V Unit Control TRANSFORMER TERMINALS COOLING SWITCHING CONTROLLED FROM COOLING STAT TO COMPRESSOR (TERMINALS 1-5) MIXED AIR SENSOR REMOTE MINIMUM POSITION POTENTIOMETER MAXIMUM DAMPER POSITION SETPOINT FOR DCV REMOTE MAXIMUM DAMPER POSITION POTENTIOMETER CO2 SENSOR INPUT DCV SENSOR SETPOINT CONTACT INPUTS TO INITIATE CONTROL SEQUENCES ISI Indoor Fan Q 0% 100% Exhaust Set Pt Exhaust DCV MODE LIGHT EXHAUST FAN ENERGIZED SETPOINT EXHAUST FAN ENERGIZED LIGHT NOTE: ALL INPUT AND OUTPUT WIRING MUST BE 24 VAC CLASS 2. The W7215A is an economizer module for use with series 72 actuators. The W7215B is similar except for an outside air content sensor input and slightly different contact inputs and outputs. The W6215A is for use with series 62 89 M23898 actuators but otherwise identical to the W7215A. The W7460A is for use with the M7415 actuator. The W7460B is similar to the A except for an outside air content sensor input and slightly different contacts. Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215B and W7460B Components FREE COOLING MODE LIGHT MINIMUM DAMPER POSITION SETPOINT SINGLE ENTHALPY SETPOINT 24VAC TR Hot B C 24VAC Hot ACTUATOR POWER SUPPLY TERMINALS 24VAC Com A TR1 Com D So Sr OUTSIDE AIR ENTHALPY SENSOR + RETURN AIR ENTHALPY SENSOR 5 1 + 2-10V OUT – CONTACT OUTPUTS 2 Mininum Position 3 4 T T1 P P1 Open W7215B ACTUATOR CONTROL TERMINALS Free Cooling Maximum Position Free Cool Alarm Q Q1 Close 6V AQ + AQ1 10V ISI Set Pt SD SD1 AC AC1 2V Unit Control Exhaust Fan TRANSFORMER TERMINALS + – COOLING SWITCHING CONTROLLED FROM COOLING STAT TO COMPRESSOR (TERMINALS 1-5) MIXED AIR SENSOR REMOTE MINIMUM POSITION POTENTIOMETER MAXIMUM DAMPER POSITION SETPOINT FOR DCV REMOTE MAXIMUM POSITION POTENTIOMETER DCV SENSOR INPUT DCV SENSOR SETPOINT CONTACT INPUTS TO INITIATE CONTROL SEQUENCES ISI Indoor Fan 6V 0A OUTDOOR AIR CONTENT SENSOR INPUT 0A1 Q 2V 100% OSI Set Pt OSI DCV MODE LIGHT OUTDOOR AIR CONTENT SENSOR SETPOINT OUTDOOR AIR CONTENT MODE LIGHT NOTE: ALL INPUT AND OUTPUT WIRING MUST BE 24 VAC CLASS 2. The W7215B and W7460B are equipped with outdoor air content sensor inputs. There are slight variations to the input and output terminals: • The purge function is eliminated. 63-8594 Honeywell Economizers 90 M23899 • An alarm contact output is added for when the indoor DCV and outdoor air content setpoints are simultaneously exceeded. Refer to page 91. • The exhaust fan setpoint and exhaust indication light are eliminated. • An outdoor air content sensor setpoint and indication light are added. Section 7 - W6215, W7215 And W7460 Economizer Modules W6215, W7215, W7460 Inputs and Outputs Contact Outputs Contact Inputs CONTACTS CLOSED WHEN OUTDOOR ENTHALPY IS LOW. FREE COOL LIGHT IS ILLUMINATED SIMULTANEOUSLY Free Cool AIR HANDLER CONDITIONING SECTION CIRCUIT EXHAUST FAN STOP/START CIRCUIT W6215A W7215A W7460A ECONOMIZER MODULES 4 Unit Control Exhaust Fan Indoor Fan SD1 3 AC 2 AC1 AIR CHANGE PG1 PURGE ISI 1 SHUTDOWN 6 AIR HANDLER SUPPLY FAN START/STOP CIRCUIT M23921 Indoor Fan Contacts Contacts are made when the Air Change contacts are made (AC and AC1) Exhaust Fan Contacts The Contacts are made when: The Purge Contacts (PG and PG1) are made or The Air Change Contacts are made (AC and AC1) Unit Control Contacts The Contacts are made when the panel is powered except during shutdown Air change or Purge 1 2 3 Free Cooling Contacts Contacts are made with the unit is in the Economizer mode 4 Alarm Contacts Contacts are made when both indoor and outdoor Air content setpoints are exceeded 5 CONTACTS CLOSED WHEN OUTDOOR ENTHALPY IS LOW. FREE COOL LIGHT IS ILLUMINATED SIMULTANEOUSLY AIR CONTENT SENSOR ALARM AIR HANDLER CONDITIONING SECTION CIRCUIT EXHAUST FAN STOP/START CIRCUIT Free Cool Alarm Exhaust Fan Indoor Fan 6 W7215B, W7460B ECONOMIZER MODULES 4 Unit Control Input Contacts Can be made with time based controls or manually using a relay or jumper 5 3 AC 2 ISI SD1 SHUTDOWN AC1 AIR CHANGE 6 1 AIR HANDLER SUPPLY FAN START/STOP CIRCUIT M23922 This series of economizer modules includes input and output contacts for use in controlling the fans and conditioning equipment on the air 91 handler. Some of these contacts are not available on all modules. Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules Input and Output Applications HOUR COUNTER HEATING COIL COOLING COIL EXHAUST AIR FAN EXHAUST FAN SETPOINT FREE COOL UNIT CONTROL EXHAUST FAN W6215A W7215A W7460A ECONOMIZER MODULES INDOOR FAN Exhaust Fan SD AC PG Indoor Fan SD1 AC1 PG1 OCCUPANCY TIMER AC1 PG1 ISI 0% 100% Exhaust Set Pt Exhaust SMOKE, FIRE DETECTION CIRCUIT M13841 NOT TO BE USED AS A LIFE SAFETY DEVICE Free Cool Contacts Free Cool Contacts are made when the unit is in the economizer mode. This allows connection of a timer to the logic modules to track the hours available for free cooling NOT the number of actual cooling hours. Actual hours of cooling can be logged using the contact closure from the commercial thermostat. Exhaust Fan Setpoint Exhaust Fan Setpoint is the option to set the actual outside air damper position when the Exhaust Fan is powered through a set of contacts. The unit has an approximate 45 63-8594 Honeywell Economizers AC 50% PG 92 second delay from the time the indoor air sensor calls for the fan and when the fan is energized to allow the outside air damper to reach the position. This prevents placing an extra load on the fan by running it when the outside dampers are closed. Purge Contacts When the Purge Contacts are connected with a jumper or relay closure the outside air dampers close, the exhaust fan contacts are made and the contacts to the indoor fans and unit control are opened. This allows the building manager to exhaust smoke from the building but not add outside air. Section 7 - W6215, W7215 And W7460 Economizer Modules 6V AQ + 10V 2V HOUR COUNTER TO AIR CLEANER OR AIR CONTENT ALARM FREE COOL ALARM EXHAUST AIR FAN UNIT CONTROL EXHAUST FAN – ISI Set Pt SD SD1 AC AC1 ISI HEATING COIL COOLING COIL AQ1 W7215B W7460B ECONOMIZER MODULES INDOOR FAN 6V 0A 2V 100% OSI Set Pt SD SD1 AC AC1 OCCUPANCY TIMER OSI DCV SENSOR SETPOINT DCV MODE LIGHT 0A1 OUTDOOR AIR CONTENT SENSOR SETPOINT OUTDOOR AIR CONTENT MODE LIGHT M13842 NOT TO BE USED AS A LIFE SAFETY DEVICE Shutdown Contacts When the Shutdown Contacts are connected with a jumper or relay closure, the outside dampers close, and the contacts to the exhaust and indoor fans and unit control are opened turning all systems off. This allows the building manager to shut down all systems from one contact closure. Air Change Contacts When the Air Change Contacts are connected with a jumper or relay closure, the outside dampers open, and the contacts to the 93 exhaust and indoor fans are made. This option allows the building manager to change the air in the building before occupancy or before an event when the space will be full, as in a theater before the movie begins. Alarm Contacts Alarm Contacts only available on B models with outdoor air content sensors. Contacts are made when both indoor (DCV) and outdoor content sensor values exceed their respective setpoints. These contacts can be used to initiate visual or audible annunciation of an air content alarm or to turn on an air cleaner. Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules Minimum and Maximum Settings Mininum Position 3 Open DAMPER POSITION 4 T T1 P P1 100 80 120 60 Free Cool Maximum Position Q 40 °F 2V 140 REMOTE MINIMUM POSITION CONTROL DCV MIN POSITION CODE VENTILATION RATE 100 80 Q1 120 60 40 Closed 6V AQ 100% OPEN C7150 OR C7046 MIXED OR SUPPLY AIR SENSOR °F 140 REMOTE MINIMUM POSITION CONTROL MIN POS AQ1 10V AN1 C7232 OR C7632 DCV CO2 SENSOR GND 0% OPEN 450 PPM ppm M23923 800 PPM 2000 PPM CO2 LEVEL This series of economizer modules includes both minimum and maximum damper position settings. Previous economizer controls are equipped with only a minimum setting to maintain a volume of outside air for ventilation. The minimum setting on these modules is to ventilate for the building components when using DCV or to ventilate for cfm per person for maximum occupancy when not using DCV. The maximum setting is used to limit the amount of outside air brought into the air handler. NORMAL OPERATION WITHOUT DCV CO2 SENSOR ONLY DCV ECONOMIZER FULL OCCUPANCY DCV ECONOMIZER M23972 When using DCV, this is the sum of the ventilation for the building components and the maximum design human occupancy. See above for control of dampers using DCV and minimum and maximum damper positions. When DCV is not used this setting can be used to limit the amount of outside air brought into the system. If the dampers are being modulated from the mixed air sensor as the first stage of cooling from the commercial thermostat, the DCV maximum setting is not in the circuit and the dampers can be opened fully as needed. If the dampers are being modulated from both the mixed air sensor and the DCV sensor, the dampers will be opened to whichever is a higher signal. If the mixed air temperature decreases below 40°F (4°C) the signal from the DCV sensor is ignored and the dampers are modulated toward closed to prevent freezing of coils and other equipment in the air handler. 63-8594 Honeywell Economizers 94 Section 7 - W6215, W7215 And W7460 Economizer Modules Outdoor Air Content Sensor THESE CONTACTS CLOSE IF BOTH THE OUTDOOR AND INDOOR SETPOINTS ARE EXCEEDED Free Cool W7215B, W7460B ECONOMIZER MODULES AN1 AQ AQ1 Unit Control SD SD1 Exhaust Fan AC AC1 0A 0A1 Alarm GND C7232 OR C7632 DCV CO2 SENSOR ISI Indoor Fan OUTDOOR AIR CONTENT SENSOR M23924 Outdoor Air Content Sensor DCV Below Below Setpoint Setpoint Above Setpoint Above Setpoint Below Setpoint Above Setpoint Mixed Air Damper Actuator Modulation based on signal from mixed air temperature sensor. Modulation between minimum and maximum positions based on signal from either mixed air or indoor air content sensors, whichever signal is higher. Closed fully. Modulation based on signal from mixed air temperature sensor. Terminals labeled Alarm made to energize warning light, audio alarm or air cleaner. The purpose of the DCV sensor is different from that of the outdoor air content sensor. On the economizer modules equipped with outdoor air content sensors the purpose of the sensor is to keep the outside air dampers at a 95 Outdoor Air Content Sensor Alarm Light Contacts Off Open Off Open On Open On Made minimum position if the outdoor air is above its setpoint threshold. Alarm contacts on the economizer module will close if both the outdoor and indoor air (DCV) signals are above their respective setpoint thresholds. Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W6215, W7215 and W7460 Actuator Usage ML7275, ML7285 ACTUATOR 90 60 60 30 30 500 W7210 OR W7215 ECONOMIZER MODULE W7210 OR W7215 ECONOMIZER MODULE 0 M7415 ACTUATOR 24 VAC HOT 500 24 VAC 24 VAC COM 24 VAC HOT L2 L1 TR TR1 24 VAC COM SENSOR T T1 P1 MIN POSN P RED < BLACK WHITE + + _ + 2-10V OUT 2-10V OUT Q769C MINIMUM POSITION POTENTIOMETER _ _ M13827 M13830 W6215 ECONOMIZER MODULE ML6285A ACTUATOR 60 30 90 60 BLACK 30 500 0 W7460 ECONOMIZER MODULE 24 VAC HOT RED 24 VAC COM YELLOW CLOSE M7415 ACTUATOR 500 24 VAC BLUE TR L2 TR1 L1 OPEN SENSOR T ORANGE TAN GREEN T1 OPEN P1 MIN POSN P 500 OHM POT OUTPUT FOR M7415 _ (P) CLOSED M13832 M13831 The W7460 can only be used with the M7415 actuator. The W7215 can be used with series 72 actuators (Direct Coupled Actuators, M7215 and Modutrol motors) and the M7415, when a Q769C potentiometer is used to adapt 63-8594 Honeywell Economizers +(P1) 96 to the 2 to 10 Vdc signal to the M7415. The W6215 is only usable with series 62 actuators. Refer to Section 5 on W6210 and W7210 economizer modules for more information on parallel and ML7295H actuator connections. Section 7 - W6215, W7215 And W7460 Economizer Modules W6215, W7215 and W7460 Wiring Diagram ML7275, ML7285 MIXED AIR ACTUATOR 60 30 90 W7215 ECONOMIZER MODULE RED 24 VAC HOT 60 24 VAC TR HOT 30 500 BLACK 0 24 VAC COM 500 WHITE TR1 COM C7400 OUTDOOR ENTHALPY SENSOR + SO + SR RELAYS 1K AND 2K ENERGIZE IF OUTDOOR ENTHALPY EXCEEDS RETURN AIR ENTHALPY + S + _ 1S 5 1 2 3 4 1K 1S SWITCHES WHEN POWERED BY 24 VOLTS 2K MIXED AIR 1S1 CIRCUITRY MINIMUM POSITION ADJUSTMENT CONTACTS CLOSED WHEN OUTDOOR ENTHALPY IS LOW MAXIMUM POSITION ADJUSTMENT FREE COOL FREE COOL LIGHT IS ILLUMINATED SIMULTANEOUSLY C7400 RETURN ENTHALPY SENSOR + S C7150 OR C7046 MIXED OR DISCHARGE AIR SENSOR T T1 P P1 Q Q1 CO2 SENSOR AN1 AQ AQ1 GND ppm AIR HANDLER CONDITIONING SECTION CIRCUIT UNIT CONTROL SD SD1 SHUTDOWN EXHAUST FAN STOP/START CIRCUIT EXHAUST FAN AC AC1 AIR CHANGE INDOOR FAN PG PG1 PURGE AIR HANDLER SUPPLY FAN START/STOP CIRCUIT LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) TRANSFORMER 1 R F 110 120 W 130 100 Y1 HVAC EQUIPMENT TERMINAL STRIP 140 90 15 80 16 70 C 170 60 180 Y2 W2 Y1 COOL1 Y2 COOL2 W2 HEAT 2 W1 HEAT 1 W1 G FAN DELAY G RH FAN FDR R RC COMMERCIAL THERMOSTAT 1 HONEYWELL RECOMMENDS USE OF A SINGLE LARGE TRANSFORMER FOR BOTH THE ECONOMIZER LOGIC MODULE AND THE COOLING COMMERCIAL THERMOSTAT CIRCUIT. 97 M13821 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W6215A 24 VAC HOT HONEYWELL SERIES 62 ACTUATOR (ML6275, ML6285, M6275, M6285) 24 VAC COM TR CLOSE SO TR1 + + S OPEN SR + 620 OHM RESISTOR 6 5 1S 1K 1 2 2K 3 4 4 9 5 T1 WIPER T 1S1 CLOSED MINIMUM POSITION ADJUSTMENT P P1 Q Q1 AQ AQ1 MAXIMUM POSITION ADJUSTMENT FREE COOL 9 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR OPEN 500 OHM – 2-10 VDC + INDOOR AIR SENSOR UNIT CONTROL SD EXHAUST FAN AC AC1 AIR CHANGE INDOOR FAN PG PG1 PURGE SD1 C7400 OUTDOOR AIR ENTHALPY SENSOR 8 SHUT DOWN UNOCCUPIED ST6008 TIMER OCCUPIED C Y1 COOL 1 W2 W2 HEAT 2 W1 W1 HEAT 1 Y1 W Y2 R T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT FAN DELAY RELAY G RH FDR FAN G RC FDR 7 3 L2 2 1 L1 (HOT) R X T7300 OR T874 THERMOSTAT HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. 9 FOR TWO-STAGE COMMERCIAL THERMOSTATS ONLY. 5 THE COMMON FOR THE W6215A IS DIFFERENT THAN THE COMMON (WIPER) FOR THE SERIES 62 ACTUATORS. BE SURE TO CONNECT EACH TO A DIFFERENT CIRCUIT. M11803A W6215A used in single-stage cooling system with single enthalpy changeover and Honeywell Series 62 Actuator 63-8594 Honeywell Economizers 98 Section 7 - W6215, W7215 And W7460 Economizer Modules W6215A 24 VAC HOT HONEYWELL SERIES 62 ACTUATOR 24 VAC COM CLOSE (ML6275, ML6285, M6275, M6285) TR TR1 SO + SR + + S OPEN 620 OHM RESISTOR 6 5 1K 1S 2K 4 1 2 3 4 T T1 P P1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR OPEN WIPER 500 OHM 5 1S1 CLOSED MINIMUM POSITION ADJUSTMENT FREE COOL MAXIMUM POSITION ADJUSTMENT Q Q1 AQ AQ1 C7400 OUTDOOR AIR ENTHALPY SENSOR T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT – W R 2-10 VDC INDOOR AIR + SENSOR UNIT CONTROL SD SD1 SHUT DOWN EXHAUST FAN AC AC1 AIR CHANGE INDOOR FAN PG PG1 PURGE 8 UNOCCUPIED ST6008 TIMER C Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 OCCUPIED FAN DELAY RELAY G RH FDR G RC FAN FDR 7 R X 2 3 L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP T7300 OR T874 THERMOSTAT 5 THE COMMON FOR THE W6215A IS DIFFERENT THAN THE COMMON (WIPER) FOR THE SERIES 62 ACTUATORS. BE SURE TO CONNECT EACH TO A DIFFERENT CIRCUIT. 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. M11800A W6215A used in two-stage cooling system with a Honeywell Series 62 Actuator 99 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules MASTER ML6275, ML6285 W6215A 24 VAC HOT 1 BLACK 3 RED 24 VAC COM YELLOW CLOSE BLUE TR TR1 SO + SR + S + OPEN 620 OHM RESISTOR 6 5 1K 1S 4 2 3 4 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 2K OPEN 8 500 OHM 1 WIPER 1S1 CLOSED MINIMUM POSITION ADJUSTMENT T T1 P P1 Q Q1 C7400 OUTDOOR AIR ENTHALPY SENSOR 9 SLAVE ML6275, ML6285 FREE COOL MAXIMUM POSITION ADJUSTMENT AQ – AQ1 + BLACK RED UNIT CONTROL SD EXHAUST FAN AC INDOOR FAN PG SD1 2-10 VDC INDOOR AIR SENSOR SHUT DOWN YELLOW BLUE AC1 AIR CHANGE PG1 PURGE C Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 FAN DELAY RELAY G RH FDR FAN G RC FDR 7 X R T7300 OR T874 THERMOSTAT ST6008 TIMER OCCUPIED 1 L2 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE LOAD OF ALL ACTUATORS. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 2 5 UNOCCUPIED 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 CONNECT ONLY THE MASTER ACTUATOR TO THE W6215 FEEDBACK OUTPUT. 9 THE COMMON FOR THE W6215A IS DIFFERENT THAN THE COMMON (WIPER) FOR THE SERIES 62 ACTUATORS. BE SURE TO CONNECT EACH TO A DIFFERENT CIRCUIT. M16060A FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. W6215 controlling parallel-wired Honeywell Series 62 Direct Coupled Actuators 63-8594 Honeywell Economizers 100 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215A 24 VAC HOT HONEYWELL SERIES 72 ACTUATOR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) TR TR1 SO + SR + 620 OHM RESISTOR 6 5 1S 1K 1 2 3 4 T T1 P P1 Q Q1 AQ AQ1 C7400 + OUTDOOR AIR S ENTHALPY SENSOR 9 9 4 2K + + 2-10 VDC OUT – C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1S1 – MINIMUM POSITION ADJUSTMENT 5 FREE COOL MAXIMUM POSITION ADJUSTMENT – + UNIT CONTROL SD EXHAUST FAN AC INDOOR FAN PG 2-10 VDC INDOOR AIR SENSOR SD1 SHUT DOWN AC1 AIR CHANGE PG1 PURGE C 8 Y1 COOL 1 W2 W2 HEAT 2 W1 W1 HEAT 1 Y1 W Y2 R T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT UNOCCUPIED ST6008 TIMER OCCUPIED FAN DELAY RELAY G RH FDR G RC FAN FDR 7 3 L2 2 1 L1 (HOT) R X T7300 OR T874 THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 FOR THE ML7295A,C, USE THE 4-20mA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. HVAC EQUIPMENT TERMINAL STRIP 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. 9 FOR TWO-STAGE COMMERCIAL THERMOSTATS ONLY. M11804A W7215A used in single-stage cooling system with single enthalpy changeover and Honeywell Series 72 Actuator 101 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules ML7285 W7215A 24 VAC HOT 1 RED 3 BLACK 24 VAC COM WHITE TR TR1 SO + SR + C7400 OUTDOOR AIR ENTHALPY SENSOR S + BROWN 620 OHM RESISTOR ML7285 6 5 RED 1K 1S 1 2 3 4 T T1 P P1 Q Q1 BLACK 4 WHITE + BROWN C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 2K 2-10V OUT 1S1 Ð MINIMUM POSITION ADJUSTMENT FREE COOL 1 2 MAXIMUM POSITION ADJUSTMENT AQ UNIT CONTROL SD EXHAUST FAN AC INDOOR FAN PG POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 7 AQ1 Ð + SD1 2-10 VDC INDOOR AIR SENSOR SHUT DOWN AC1 AIR CHANGE PG1 PURGE C Y1 Y1 COOL 1 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE LOAD OF ALL ACTUATORS. Y2 Y2 COOL 2 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. W2 W2 HEAT 2 5 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF T HE TIMER. W1 W1 HEAT 1 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. FAN DELAY RELAY G RH 5 UNOCCUPIED ST6008 TIMER FDR G FAN OCCUPIED RC X T7300 OR T874 THERMOSTAT FDR R HVAC EQUIPMENT TERMINAL STRIP 2 L2 1 L1 (HOT) M11793A W7215A controlling parallel-wired Honeywell Series 72 Direct Coupled Actuators 63-8594 Honeywell Economizers 102 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215A 24 VAC HOT HONEYWELL SERIES 72 ACTUATOR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) TR TR1 SO + SR + C7400 OUTDOOR AIR ENTHALPY SENSOR + S 620 OHM RESISTOR 6 5 1S 1K 4 2-10V OUT – 3 4 T T1 P P1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1S1 – 5 2 2K + + 1 MINIMUM POSITION ADJUSTMENT FREE COOL MAXIMUM POSITION ADJUSTMENT T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT Q Q1 AQ AQ1 SD SD1 SHUT DOWN AC1 AIR CHANGE PG1 PURGE – + UNIT CONTROL EXHAUST FAN INDOOR FAN AC PG W R 2-10 VDC INDOOR AIR SENSOR UNOCCUPIED ST6008 TIMER C Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 OCCUPIED 8 FAN DELAY RELAY G FDR RH FAN G RC FDR 7 R X T7300 OR T874 THERMOSTAT 2 3 L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 5 FOR THE ML7295A,C, USE THE 4-20 mA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. M11801A W7215A used in two-stage cooling system with Honeywell Series 72 Actuator 103 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215A 24 VAC HOT 24 VAC COM TR TR1 SO + SR + S + C7400 OUTDOOR AIR ENTHALPY SENSOR 620 OHM RESISTOR T2 + 4 2-10V OUT 2 3 4 T T1 MOD MOTOR SERIES 72 P P1 T1 Q Q1 AQ AQ1 MINIMUM POSITION ADJUSTMENT FREE COOL MAXIMUM POSITION ADJUSTMENT T2 + Ð C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1S1 Ð 2 1 2K + Ð 1 1K 1S T1 1 Ð 2-10 VDC INDOOR AIR SENSOR + UNIT CONTROL SD EXHAUST FAN AC INDOOR FAN PG POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. SD1 SHUT DOWN AC1 AIR CHANGE PG1 PURGE C ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. Y1 Y1 COOL 1 3 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. Y2 Y2 COOL 2 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. W2 W2 HEAT 2 5 FOR T7300 ONLY. W1 W1 HEAT 1 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 3 UNOCCUPIED ST6008 TIMER G OCCUPIED RH FDR G FAN RC 5 X M11794A 6 5 MOD MOTOR SERIES 72 T7300 OR T874 THERMOSTAT R FDR 2 L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP W7215A controlling parallel-wired Honeywell Series 72 Modutrol Motors 63-8594 Honeywell Economizers 104 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215A 24 VAC HOT 24 VAC COM TR TR1 SO + SR + S + 620 OHM RESISTOR 5 1 TR1 P1 P Q769C + Ð 4 + 2-10V OUT P1 P 2 3 4 5 6 7 Q769C FREE COOL MAXIMUM POSITION ADJUSTMENT + Ð 2 3 4 T T1 P P1 Q Q1 AQ AQ1 1S1 MINIMUM POSITION ADJUSTMENT TR 1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 2K M7415 TR1 1K 1S Ð 1 Ð + UNIT CONTROL SD EXHAUST FAN AC INDOOR FAN PG POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M7415 MOTOR MUST USE ANINDEPENDENT TRANSFORMER. ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. SD1 AC1 PG1 2-10 VDC INDOOR AIR SENSOR SHUT DOWN AIR CHANGE PURGE 7 C Y1 Y1 COOL 1 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. Y2 Y2 COOL 2 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. W2 W2 HEAT 2 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE T HE LOAD OF ALL ACTUATORS. W1 W1 HEAT 1 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. FOR T7300 ONLY. 3 UNOCCUPIED ST6008 TIMER G RH OCCUPIED FDR G FAN RC X M11795A 6 M7415 TR 5 C7400 OUTDOOR AIR ENTHALPY SENSOR R FDR 2 L2 1 L1 (HOT) T7300 OR T874 HVAC EQUIPMENT THERMOSTAT TERMINAL STRIP W7215A controlling parallel-wired M7415 Motors 105 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215A 24 VAC HOT HONEYWELL SERIES 72 ACTUATOR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) 1K + 1 2 3 4 T T1 MINIMUM POSITION ADJUSTMENT P P1 Q Q1 6 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1S1 Ð 7 C7400 OUTDOOR AIR ENTHALPY SENSOR 620 OHM RESISTOR 2K + 2-10V OUT Ð SR S 5 4 T775 CONTROLLER TR1 + + 1S + TR SO 5 FREE COOL NC COM NO NC COM NO NO COM NC 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 FOR THE ML7295A,C, USE THE 4-20 MA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. AQ UNIT CONTROL SD EXHAUST FAN AC INDOOR FAN PG W ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 MAXIMUM POSITION ADJUSTMENT R T6031 AMBIENT LOCKOUT CONTROL 50¡ F SETPOINT AQ1 Ð 2-10 VDC INDOOR + AIR SENSOR SD1 SHUT DOWN AC1 AIR CHANGE PG1 PURGE C Y1 COOL 1 Y2 COOL 2 UNOCCUPIED 6 7 ST6008 TIMER OCCUPIED 2 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. G FAN 3 L2 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. A MAXIMUM ONE STAGE OF HEATING IS POSSIBLE WHEN THE SYSTEM IS WIRED IN THIS FASHION. R HVAC EQUIPMENT TERMINAL STRIP 1 L1 (HOT) M11792B W7215A used with T775 Series 1000 Controller and Honeywell Series 72 Actuator 63-8594 Honeywell Economizers 106 Section 7 - W6215, W7215 And W7460 Economizer Modules HONEYWELL SERIES 72 ACTUATOR 24 VAC HOT W7215A 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) TR TR1 SO + SR + S + 620 OHM RESISTOR 5 1S 1K 4 + 2 3 4 T T1 P P1 Q Q1 2K + 2-10V OUT Ð 1 MINIMUM POSITION ADJUSTMENT 6 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1S1 Ð C7400 OUTDOOR AIR ENTHALPY SENSOR 5 FREE COOL T775 CONTROLLER 7 C + NO C NC NO C NC SD EXHAUST FAN AC INDOOR FAN PG 2-10 VDC INDOOR AIR SENSOR SD1 SHUT DOWN AC1 AIR CHANGE PG1 PURGE W T6031 AMBIENT LOCKOUT CONTROL 50¡ F SETPOINT C Y1 COOL 1 Y2 COOL 2 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. UNOCCUPIED ST6008 TIMER OCCUPIED 2 G FAN 3 L2 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 5 Ð AQ1 + UNIT CONTROL R 4 AQ NC C NO NC C NO 1 MAXIMUM POSITION ADJUSTMENT R FOR THE ML7295A,C, USE THE 4-20 MA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. M13845 W7215A used with T775 Series 2000 Controller and Honeywell Series 72 Actuator 107 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215B 24 VAC HOT HONEYWELL SERIES 72 ACTUATOR TR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) SO SR TR1 C7400 + OUTDOOR AIR S ENTHALPY SENSOR + + 620 OHM RESISTOR 6 5 1K 1S 4 2-10 VDC OUT Ð MINIMUM POSITION ADJUSTMENT FREE COOL T T1 P P1 AQ AQ1 UNIT CONTROL SD SD1 EXHAUST FAN AC AC1 INDOOR FAN OA POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. FOR THE ML7295A,C, USE THE 4-20 mA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. 9 FOR TWO-STAGE COMMERCIAL THERMOSTATS ONLY. C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 9 Q1 1 6 4 Q MAXIMUM POSITION ADJUSTMENT ALARM 5 3 1S1 Ð 5 4 2 2K + + 1 9 Ð + 2-10 VDC INDOOR AIR SENSOR SHUT DOWN AIR CHANGE Ð OA1 + 7 2-10 VDC OUTDOOR AIR SENSOR C Y1 W Y2 R T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT COOL 1 Y1 ST6008 TIMER OCCUPIED W2 W2 HEAT 2 W1 W1 HEAT 1 FAN DELAY RELAY G RH FDR G RC FAN FDR 2 R X T7300 OR T874 THERMOSTAT HVAC EQUIPMENT TERMINAL STRIP W7215B used in single-stage cooling system with single enthalpy changeover and Honeywell Series 72 Actuator 63-8594 Honeywell Economizers 8 UNOCCUPIED 108 3 1 L2 L1 (HOT) M11812A Section 7 - W6215, W7215 And W7460 Economizer Modules HONEYWELL SERIES 72 ACTUATOR W7215B 24 VAC HOT 24 VAC COM TR1 TR (ML7275, ML7285, ML7295A,C M7275, M7285) SO + SR + 620 OHM RESISTOR 6 5 1K 1S 4 + 2 3 4 T T1 P P1 1S1 MINIMUM POSITION ADJUSTMENT Ð 5 FREE COOL MAXIMUM POSITION ADJUSTMENT ALARM T775 CONTROLLER NC COM NO 7 NC COM NO C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 2K + 2-10V OUT Ð 1 Q Q1 AQ AQ1 T6031 AMBIENT LOCKOUT CONTROL 50¡ F SETPOINT Ð + UNIT CONTROL SD SD1 EXHAUST FAN AC AC1 INDOOR FAN OA OA1 W R 2-10 VDC INDOOR AIR SENSOR SHUT DOWN AIR CHANGE Ð + NO COM NC C7400 + OUTDOOR AIR S ENTHALPY SENSOR 2-10 VDC OUTDOOR AIR SENSOR C 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. Y1 COOL 1 Y2 COOL 2 UNOCCUPIED ST6008 TIMER OCCUPIED 2 5 FOR THE ML7295A,C, USE THE 4-20 mA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. A MAXIMUM OF ONE STAGE HEATING IS POSSIBLE WHEN THE SYSTEM IS WIRED IN THIS FASHION. G FAN 3 L2 R 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP M11815B W7215B used with T775 Series 1000 Controller and Honeywell Series 72 Actuator 109 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules HONEYWELL SERIES 72 ACTUATOR W7215B 24 VAC HOT 24 VAC COM TR1 TR C7400 (ML7275, ML7285, ML7295A,C M7275, M7285) SO + SR + + OUTDOOR AIR ENTHALPY S SENSOR 620 OHM RESISTOR 6 5 1K 1S 4 + 2 3 4 2K + 2-10V OUT Ð 1 1S1 MINIMUM POSITION ADJUSTMENT Ð T T1 P P1 5 FREE COOL T775 CONTROLLER MAXIMUM POSITION ADJUSTMENT Q Q1 ALARM AQ AQ1 UNIT CONTROL SD SD1 EXHAUST FAN AC AC1 INDOOR FAN + T6031 AMBIENT LOCKOUT CONTROL 50¡ F SETPOINT Ð + 7 C C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR OA OA1 NO C NC 2-10 VDC INDOOR AIR SENSOR SHUT DOWN AIR CHANGE Ð + 2-10 VDC OUTDOOR AIR SENSOR C NO C NC Y1 COOL 1 Y2 COOL 2 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 G 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. FAN 3 L2 R 6 UNOCCUPIED ST6008 TIMER OCCUPIED 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 5 R NC C NO NC C NO 4 W 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP FOR THE ML7295A,C, USE THE 4-20 mA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. M13846 W7215B used with T775 Series 2000 Controller and Honeywell Series 72 Actuator 63-8594 Honeywell Economizers 110 Section 7 - W6215, W7215 And W7460 Economizer Modules W7215B 24 VAC HOT HONEYWELL SERIES 72 ACTUATOR 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) TR TR1 SO + SR + 620 OHM RESISTOR 6 5 1K 1S 2-10V OUT Ð 3 4 T T1 P P1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 2K + + 2 1 4 1S1 Ð MINIMUM POSITION ADJUSTMENT 5 FREE COOL Q Q1 MAXIMUM POSITION ADJUSTMENT AQ AQ1 UNIT CONTROL SD SD1 EXHAUST FAN AC AC1 INDOOR FAN OA ALARM C7400 + OUTDOOR AIR S ENTHALPY SENSOR _ + T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT W R 2-10 VDC INDOOR AIR SENSOR SHUT DOWN AIR CHANGE _ OA1 + 2-10 VDC OUTDOOR AIR SENSOR 8 UNOCCUPIED 7 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 4 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 5 FOR THE ML7295A,C, USE THE 4-20 mA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. FDR RH G RC X T7300 OR T874 THERMOSTAT OCCUPIED FAN DELAY RELAY G 7 FOR T7300 ONLY. 8 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. ST6008 TIMER C FAN FDR R HVAC EQUIPMENT TERMINAL STRIP 2 3 1 L2 L1 (HOT) M11810A W7215B used in two-stage cooling system with Honeywell Series 72 Actuator 111 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W7460A TR TR1 SO + SR + + S 620 OHM RESISTOR 5 1K 1S 3 P1 M7415 OUT P TR1 TR 1 L1 1 (HOT) 4 T T1 P P1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1S1 Ð MINIMUM POSITION ADJUSTMENT FREE COOL L2 3 2K + MAXIMUM POSITION ADJUSTMENT T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT Q Q1 AQ AQ1 _ + UNIT CONTROL SD SD1 SHUT DOWN EXHAUST FAN AC AC1 AIR CHANGE INDOOR FAN PG PG1 PURGE POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M7415 MOTOR MUST USE AN INDEPENDENT TRANSFORMER. R 4 6 C Y1 Y1 COOL 1 3 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. Y2 Y2 COOL 2 4 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. W2 W2 HEAT 2 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. W1 W1 HEAT 1 5 FDR RH G FAN RC T7300 OR T874 THERMOSTAT OCCUPIED FAN DELAY RELAY G X UNOCCUPIED ST6008 TIMER ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. FOR T7300 ONLY. W 2-10 VDC INDOOR AIR SENSOR 2 6 5 2 1 M7415 C7400 OUTDOOR AIR ENTHALPY SENSOR R FDR 2 HVAC EQUIPMENT TERMINAL STRIP 1 L2 L1 (HOT) M11802A W7460A used in two-stage cooling system with M7415 Motors 63-8594 Honeywell Economizers 112 Section 7 - W6215, W7215 And W7460 Economizer Modules W7460A TR TR1 SO + SR + 5 1K 1S M7415 4 P1 3 P TR 3 4 T T1 P P1 1S1 Ð MINIMUM POSITION ADJUSTMENT FREE COOL L2 L1 1 (HOT) 2 620 OHM RESISTOR MAXIMUM POSITION ADJUSTMENT Q Q1 AQ AQ1 4 7 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 2K + M7415 OUT TR1 1 C7400 + OUTDOOR AIR S ENTHALPY SENSOR T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT - UNIT CONTROL SD SD1 SHUT DOWN EXHAUST FAN AC AC1 AIR CHANGE INDOOR FAN PG PG1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M7415 MOTOR MUST USE ANINDEPENDENT TRANSFORMER. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 4 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. W R 2-10 VDC INDOOR AIR SENSOR + 1 7 PURGE 5 C Y1 6 UNOCCUPIED COOL 1 Y1 ST6008 TIMER Y2 5 FOR T7300 ONLY. 6 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. 7 FOR TWO-STAGE COMMERCIAL THERMOSTATS ONLY. OCCUPIED W2 W2 HEAT 2 W1 W1 HEAT 1 FAN DELAY RELAY G RH FDR G FAN RC X T7300 OR T874 THERMOSTAT R FDR 2 HVAC EQUIPMENT TERMINAL STRIP 1 L2 L1 (HOT) M11805A W7460A used in single-stage cooling system with single enthalpy changeover and M7415 Motors 113 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W7460B TR TR1 SO + SR + + S 620 OHM RESISTOR 5 1K 1S M7415 3 P1 M7415 OUT P TR1 TR 1 L1 (HOT) 2 3 4 T T1 MINIMUM POSITION ADJUSTMENT P P1 MAXIMUM POSITION ADJUSTMENT ALARM Q Q1 AQ1 + UNIT CONTROL SD SD1 EXHAUST FAN AC AC1 INDOOR FAN OA1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M7415 MOTOR MUST USE AN INDEPENDENT TRANSFORMER. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 4 5 W R 2-10 VDC INDOOR AIR SENSOR AIR CHANGE + 1 7 SHUT DOWN _ OA 7 T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT _ AQ 4 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1S1 Ð FREE COOL L2 1 2K + C7400 OUTDOOR AIR ENTHALPY SENSOR 2-10 VDC OUTDOOR AIR SENSOR 5 C Y1 COOL 1 Y1 ST6008 TIMER Y2 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. OCCUPIED W2 W2 HEAT 2 W1 W1 HEAT 1 FOR T7300 ONLY. FAN DELAY RELAY G 6 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. 7 FOR TWO-STAGE COMMERCIAL THERMOSTATS ONLY. FDR RH G FAN RC FDR X T7300 OR T874 THERMOSTAT 2 R HVAC EQUIPMENT TERMINAL STRIP W7460B used in single-stage cooling system with single enthalpy changeover and M7415 Motors 63-8594 Honeywell Economizers 6 UNOCCUPIED 114 1 L2 L1 (HOT) M11813A Section 7 - W6215, W7215 And W7460 Economizer Modules W7460B TR1 TR SO + SR + C7400 + OUTDOOR AIR S ENTHALPY SENSOR 620 OHM RESISTOR 5 1K 1S M7415 3 P1 + 3 4 T T1 P P1 1S1 Ð MINIMUM POSITION ADJUSTMENT FREE COOL L2 L1 (HOT) 1 2 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 2K M7415 OUT P TR1 TR 1 MAXIMUM POSITION ADJUSTMENT ALARM Q Q1 AQ AQ1 + SD SD1 EXHAUST FAN AC AC1 INDOOR FAN T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT _ UNIT CONTROL W R 2-10 VDC INDOOR AIR SENSOR SHUT DOWN AIR CHANGE _ OA 5 OA1 + 2-10 VDC OUTDOOR AIR SENSOR ST6008 TIMER 4 UNOCCUPIED 6 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. M7415 MOTOR MUST USE AN INDEPENDENT TRANSFORMER. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 4 FOR T7300, USE CONTACTS A1 AND A2 INSTEAD OF THE TIMER. 5 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 6 OCCUPIED C Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 FAN DELAY RELAY G FDR RH FOR T7300 ONLY. G RC X T7300 OR T874 THERMOSTAT FAN FDR 1 L2 2 R L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP M11811A W7460B used in two-stage cooling system with M7415 Motors 115 Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules W6215/W7212/W7215/W7460 LOGIC MODULE HONEYWELL ACTUATOR 2 5 1S 1K 1 2 3 4 2K 1S1 W W973B LOGIC PANEL 2 T6031 R AMBIENT LOCKOUT CONTROL 50 F SETPOINT 1 HEAT 3 HEAT 1 L1 (HOT) 3 COOL COOL 1 2 1 COOL COOL 2 MOD-HEAT WH SENSOR BH MOD-COOL RH RC STAT 24 VAC C +20 H N BC COOL 3 WC 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR MODEL DEPENDENT ON LOGIC MODULE MODEL. M11991B T T1 3 4 2 5 1 TR TR W6215, W7215, or W7460 used with W973B Logic Panel 63-8594 Honeywell Economizers 116 L2 Section 7 - W6215, W7215 And W7460 Economizer Modules Indoor Air Content Sensor Settings 24VAC TR Hot B C 24VAC Hot 24VAC Com A ECONOMIZER MODULE WITH DCV SENSOR INPUT TR1 Com D So Sr C7242 INDOOR AIR CONTENT CO2 SENSOR + + 5 1 + – Free Cool Alarm 4 T T1 P P1 Open W7215B 2-10V OUT Exhaust Fan Indoor Fan DCV SENSOR INPUT ON TEMINALS AQ AND AQ1 Free Cooling Maximum Position Q Q1 Close 6V AQ + AQ1 10V 2V Unit Control 2 Mininum Position 3 – ISI Set Pt SD SD1 AC AC1 6V 0A 0A1 ISI 2V 100% OSI SENSOR OUTPUT IN VOLTS DC ROOM CONCENTRATION CARBON DIOXIDE IN PARTS PER MILLION 0 500 1 650 2 800 3 950 4 1100 5 1250 6 1400 7 1550 8 1700 9 1850 10 2000 Set Pt OSI 6V 10V DCV Set Pt 2V M23925 The DCV input can be any sensor with a 2 to 10 Vdc output such as the Honeywell C7242, C7232 or C7632 carbon dioxide (CO2)sensor. The sensor is supplied with preset configurations that can be used if they meet the application requirements. The output of the C7242 and C7232 sensors is reconfigurable using a desktop computer and a serial connection directly to the sensor or by switches inside the cover. The C7632 is not a configurable sensor and has a fixed 0-2000 Vdc output and no relay outputs. The output 117 chart illustrated on the right side of this page is the Analog 1 configuration of startpoint and throttling range for a linear output. The effect on the mixed air control module can be further adjusted with the DCV setpoint illustrated on the left. The typical setting for this adjustment is 2 Vdc. With this setting, the effect of the room DCV sensor begins when the sensor output is 2 Vdc. The installer sets the output range and the DCV setpoint on the economizer to adhere to local codes. Honeywell Economizers 63-8594 Section 7 - W6215, W7215 And W7460 Economizer Modules Carbon Dioxide Sensor Setup CO2 Sensors Wall Mount With Relay Display C7242A1030 No Display C7242A1048 Wall Mount Duct Mount Outside Air C7242A1014 C7242B1012 Not Available C7242A1022 C7242B1020 C7232E1007 A1 Output A2 Output 0 Vdc = 500 ppm Relay Output: (2 Vdc = 800 ppm) and 0 to 800 ppm = Open, 10 Vdc = 2,00 ppm More than 800 ppm = Closed, Reopens at less than 700 ppm Analog Sensor Mode: 0 Vdc = 500 ppm (2 Vdc = 800 ppm) and 10 Vdc = 2,000 ppm Time interval = 2 seconds For applications where factory configurations do not meet the application requirements the sensor may be re-configured by the installer to meet most configuration needs. To reconfigure the sensor connect the C7242 to a PC using the RS232 Cable and PC Configuration Software, number 32002183-001. The configuration software allows extensive configuration control via five Proportional plus Integral controls and a Delay Timer control. The Delay Timer (DT) function permits a digital input to be used to make a step change in the analog output from the sensor. A typical 63-8594 Honeywell Economizers 118 application is a manual push-button that after it is pushed the sensor output is boosted to 100% for five minutes to increase the volume of outside air for ventilation. For complete information about configuration of the sensor, refer to the programming manual in the RS232 Cable and PC Configuration Software package. Most installers prefer to use a C7632 CO2 sensor that does not need to be programed or adjusted when installed. Section 8 - W7212, W7213 and W7214 Economizer Modules Section 8 - W7212, W7213 and W7214 Economizer Modules 119 Honeywell Economizers 63-8594 Section 8 - W7212, W7213 and W7214 Economizer Modules W7212 Economizer System Components DAMPER EXHAUST AIR + S RETURN AIR SENSOR RETURN AIR FROM ROOM DAMPER OUTSIDE AIR SENSOR SUPPLY AIR TO BUILDING + S MIXED AIR SENSOR COILS FAN W7212 ECONOMIZER CONTROLLER WITH DEMAND CONTROL VENTILATION C7632 ROOM CARBON DIOXIDE SENSOR TB8220 COMMERCIAL PRO 63-8594 Honeywell Economizers M23900 120 Section 8 - W7212, W7213 and W7214 Economizer Modules W7212, W7213, and W7214 Components The W7212 DCV economizer logic module is the simplest and most popular economizer model. It combines all of the benefits of the W7459 and W7210 with the some features of the W7215. It does not include shutdown, air change and purge but does have a “N” terminal for night setback. On W7213 and W7214 models N terminal is either B or O terminal for use with heat pumps. All models can be panel mounted or directly mounted to M7215 motor. EXHAUST FAN SETPOINT LED LIGHTS WHEN EXHAUST CONTACT IS MADE MINIMUM DAMPER POSITION SETTING DEMAND CONTROL VENTILAION SETPOINT ENTHALPY SENSORS DCV 2V Max 10V AQ1 DCV AQ DCV Set 10V SO SR+ LED LIGHTS WHEN OUTDOOR AIR IS SUITABLE FOR FREE COOLING ENTHALPY CHANGEOVER SETPOINT Free Cool B C A D M20604 Potentiometer and LED locations (W7212 shown) P1 P EXH Set EXH Min Pos SO+ Min Pos Open T SR N AQ1 P 2V T Open IAQ Max CO2 SENSOR Set 10V EXH P1 SO+ N1 T1 2V T1 LED LIGHTS WHEN DEMAND CONTROL VENTILAION INPUT IS ABOVE SETPOINT NIGHT SET BACK MIXED AIR SENSOR N MAXIMUM DAMPER DEMAND CONTROL VENTILATION SETPOINT There are three models: • W7212A- Used with series 70 actuators including DCA’s and Modutrol Motors • W7213A - Used with heat pumps or conventional rooftop units. B terminal energized in heating and unenergized in cooling • W7214A - Used with heat pumps or conventional rooftop units. O terminal unenergized in heating and energized in cooling. REMOTE MINIMUM POT INPUT EXH N1 TR TR1 24 VAC HOT 24 VAC COM + – 1 2 IAQ AQ IAQ MIN SO Free Cool SR SR+ B C A D 5 3 4 EF EF1 M23970 Power at the N terminal determines the Occupied/Unoccupied setting: — If Call for cooling - dampers open to satisfy the mixed or discharge air sensor if outdoor air is good enthalpy • N terminal unpowered – Space Unoccupied: — If No call for cooling - damper drives closed if economizer is powered — If Call for cooling - dampers open to satisfy the mixed or discharge air sensor if outdoor air is good enthalpy For the W7212: • 24 Vac (Occupied) • No power (Unoccupied) • N terminal powered – Space Occupied: — If No Call for cooling or bad outdoor enthalpy - dampers drive to minimum position 121 Honeywell Economizers 63-8594 Section 8 - W7212, W7213 and W7214 Economizer Modules For the W7213 and W7214: • 24 Vac (Unoccupied) • No power (Occupied) All other inputs are same as other logic modules, for space consideration the enthalpy sensor terminals were moved to left side of control. The exhaust setpoint determines when the exhaust fan runs based on damper position. When the exhaust fan call is made, the module provides a 60 ±30 second delay before exhaust fan activation. This delay allows the damper to reach the appropriate position to avoid unnecessary fan overload. EF and EF1 are 24V dry contacts only. An external line voltage contactor is required to operate the exhaust fan. Same input for TR-TR1 for 24 Vac power to logic module and output to mechanical cooling. When the exhaust fan is deactivated the EF and EF1 relay opens immediately. Output for 2-10 Vdc and 24 Vac power to actuator is on the right side of the unit and exhaust fan output has been added. NIGHT SET BACK 24 VAC INPUT REMOTE N1 N MINIMUM DAMPER POSITION SETTING P1 P EXH Set EXH Min Pos T1 T Open MAXIMUM DCV SETPOINT LED LIGHTS WHEN DCV INPUT IS ABOVE SETPOINT IAQ Max AQ1 SO+ DCV SETPOINT IAQ MIN SO Free Cool SR B C A D ENTHALPY CHANGEOVER SETPOINT 24 VAC HOT 24 VAC COM + – 1 2 24 VAC TO ACTUATOR 2-10 VDC TO ACTUATOR OUT TO COOL 1 5 3 4 EF EF1 OUT TO COOL 1 EXHAUST FAN OUTPUT M23969 The exhaust setpoint determines when the exhaust fan runs based on damper position. Full CCW is fully closed damper position and Full CW is fully open damper position. When the EF and EF1 contacts are made after the 60 ±30 sec. delay, the EXH LED will illuminate. Damper minimum position and maximum position are the positions of the damper for ventilation for building contaminants and people occupancy. See section 1 for explanation of DCV and determination of damper settings. 63-8594 Honeywell Economizers TR1 IAQ AQ SR+ LED LIGHTS WHEN OUTDOOR AIR IS SUITABLE FOR FREE COOLING TR DCV Maximum Position Adjustment 1. Disconnect mixed air sensor from terminals T and T1 and short terminals T and T1. 2. Connect a jumper between terminals AQ and SO+. 3. Connect 24 Vac across terminals TR and TR1. 4. Adjust the potentiometer on the face of the device with a screwdriver for desired maximum position. 122 Section 8 - W7212, W7213 and W7214 Economizer Modules 5. If all minimum and maximum position adjustments are complete, remove the T-T1 jumper and reconnect the mixed air sensor. When the mixed air sensor takes control based on an increased requirement for cooling, it overrides the DCV maximum position potentiometer and can drive the damper full-open. NOTE: Make minimum position adjustments with at least a 10°F (-12°C) temperature difference between outdoor and return air. 1. Calculate the appropriate mixed air temperature, see the Equation below. 2. Disconnect mixed air sensor from terminals T and T1. If the mixed air temperature drops to 45°F, the mixed air sensor overrides the DCV and fully closes the damper to protect from freezing the hot or chilled water coils. Control returns to normal once the mixed air temperature rises to 48°F. DCV setpoint is the same as the W7215. The setpoint is based on the output of the CO2 sensor (e.g., 0-10 Vdc output for CO2 ppm of 500-1500 ppm where 0 Vdc = 500 ppm and 10 Vdc = 1500 ppm. If setpoint is 1000 ppm or 6 Vdc, then the OA damper will begin to module open when output from CO2 sensor is 6 Vdc). DCV LED light will illuminate when CO2 level is above setpoint. Free cool LED illuminates when outdoor air is suitable for free cooling whether Y1 from the commercial thermostat is calling for cooling or not. The W7212 uses the electronic A, B, C, D and high enthalpy curves on the psychrometric chart. 3. Place a jumper across terminals T and T1. 4. Ensure that either the factory-installed jumper is in place across terminals P and P1 or, if remote damper position is required, that it is wired according the image below, turned fully clockwise. S963B1128 REMOTE POTENTIOMETER CW CLOSE W R MINIMUM POSITION ADJUSTMENT P1 B P CW ECONOMIZER M20603A S963B1128 Remote Potentiometer used with logic module for remote damper control 5. Connect 24 Vac across terminals TR and TR1. Minimum Position Adjustment 6. Carefully adjust the potentiometer on the face of the device with a small screwdriver until the mixed air temperature reaches the calculated value. The following provides basic guidelines for minimum position selection and adjustment: NOTE: Ensure that the sensed air is well mixed. IMPORTANT Adjust the minimum position potentiometer to allow the minimum amount of outdoor air for building effluents, as required by local codes, to enter the building. This procedure requires use of a quality thermometer capable of reading to 0.5°F (0.25°C). 123 7. If all minimum and maximum position adjustments are complete, remove the T-T1 jumper and reconnect the mixed air sensor. Honeywell Economizers 63-8594 Section 8 - W7212, W7213 and W7214 Economizer Modules Formula to aid minimum position adjustment EXAMPLE: Assume local codes require 10% outdoor air during occupied conditions, outdoor air is 60°F and return air is 75°F. Under these conditions, what is the temperature of the mixed air? (TO × OA) + (TR × RA)= TM Where: TO = Outdoor air temperature OA = Percent of outdoor air TR = Return air temperature RA = Percent of return air TM = Resulting mixed air temperature (0.1 × 60°F) + (0.9 × 75°F) = 6.0°F + 67.5°F = 73.5°F NOTE: The following sample calculation uses only Fahrenheit temperature. 63-8594 Honeywell Economizers 124 Mixed air will be 73.5°F when OA is 60°F and RA is 75°F with 10% outdoor air. Section 8 - W7212, W7213 and W7214 Economizer Modules W7212, W7213, and W7214 Wiring Diagram TR TR1 24 Vac HOT 24 Vac COM N1 N 24 VAC HOT MINIMUM POSITION ADJUSTMENT P1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR P T1 + – T 2 AQ1 – 2-10 VDC CONTROL SIGNAL OUTPUT 1 0/2-10 VDC INDOOR AIR SENSOR 24 VAC COM 5 AQ + SO+ 3 4 EF EF1 SO SR+ M7215 SR C7400 OUTDOOR AIR ENTHALPY SENSOR + S W7212 3 5 620 OHM RESISTOR L1 (HOT) L2 EXHAUST FAN Y1 C Y2 Y1 COOL 1 W2 Y2 COOL 2 W2 HEAT 2 W1 HEAT 1 W1 A2 4 A1 A2 G A1 RH G FAN 2 L2 RC 1 L1 (HOT) R X HVAC EQUIPMENT TERMINAL STRIP T7300/Q7300 THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. USE THE SAME TRANSFORMER FOR T7300 AND ECONOMIZER. 3 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. 4 T7300 TERMINALS A1 AND A2 ARE CONNECTED WHEN COMMERCIAL THERMOSTAT IS IN THE OCCUPIED MODE. 5 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE. M20716E W7212 used with M7215 Damper Motor and T7300 Thermostat 125 Honeywell Economizers 63-8594 Section 8 - W7212, W7213 and W7214 Economizer Modules TR TR1 24 Vac HOT 24 Vac COM N1 N 24 VAC HOT MINIMUM POSITION ADJUSTMENT P1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR P T1 + – T 2 AQ1 – 2-10 VDC CONTROL SIGNAL OUTPUT 1 0/2-10 VDC INDOOR AIR SENSOR 24 VAC COM 5 AQ + SO+ 3 4 EF EF1 SO SR+ M7215 SR C7400 OUTDOOR + AIR ENTHALPY S SENSOR W7212 4 5 620 OHM RESISTOR L1 (HOT) L2 EXHAUST FAN Y1 C Y2 Y1 COOL 1 W2 Y2 COOL 2 W2 HEAT 2 W1 HEAT 1 W1 3 AUX A2 G RH G FAN RC R X T7350 THERMOSTAT 2 L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. THE SAME TRANSFORMER CAN BE USED FOR THE COMMERCIAL THERMOSTAT AND ACTUATOR. 3 IF SEPARATE HEATING AND COOLING TRANSFORMERS ARE USED, REMOVE JUMPER AT THERMOSTAT. T7350 - TERMINAL “AUX” IS POWERED BY THE HEATING TRANSFORMER (RH). IF POWERING THE ECONOMIZER TERMINAL “N” WITH THE THERMOSTAT TERMINAL “AUX”, BE SURE THE ECONOMIZER IS POWERED BY THE SAME TRANSFORMER AS TERMINAL “AUX”. IF NOT, USE AN ISOLATION RELAY TO POWER “N”. 4 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. 5 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE. M13657A W7212 used with M7215 Damper Motor and T7350 Thermostat 63-8594 Honeywell Economizers 126 Section 8 - W7212, W7213 and W7214 Economizer Modules TR TR1 24 Vac HOT 24 Vac COM N1 N 24 VAC HOT MINIMUM POSITION ADJUSTMENT P1 P C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR T1 + – T 2 AQ1 – 2-10 VDC CONTROL SIGNAL OUTPUT 1 0/2-10 VDC INDOOR AIR SENSOR 24 VAC COM 5 AQ + SO+ 3 4 EF EF1 SO SR+ M7215 SR C7400 OUTDOOR + AIR ENTHALPY S SENSOR W7212 4 5 620 OHM RESISTOR L1 (HOT) L2 EXHAUST FAN Y1 C Y2 Y1 COOL 1 W2 Y2 COOL 2 W2 HEAT 2 W1 HEAT 1 W1 A 3 A G R G FAN RC R X TB7220 OR TB8220 THERMOSTAT 2 L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. THE SAME TRANSFORMER CAN BE USED FOR THE COMMERCIAL THERMOSTAT AND ACTUATOR. 3 IF SEPARATE HEATING AND COOLING TRANSFORMERS ARE USED, REMOVE JUMPER AT THERMOSTAT. TB7220 - TERMINAL “A” IS POWERED BY THE COOLING TRANSFORMER (RC). TB8220 - TERMINAL “A” IS POWERED BY THE HEATING TRANSFORMER (R). IF POWERING THE ECONOMIZER TERMINAL “N” WITH THE THERMOSTAT TERMINAL “A”, BE SURE THE ECONOMIZER IS POWERED BY THE SAME TRANSFORMER AS TERMINAL “A”. IF NOT, USE AN ISOLATION RELAY TO POWER “N”. 4 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. M13658A 5 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE. W7212 used with M7215 Damper Motor and TB7220 or TB8220 Thermostats 127 Honeywell Economizers 63-8594 Section 8 - W7212, W7213 and W7214 Economizer Modules TR TR1 24 Vac HOT 24 Vac COM N1 ~ N 1 2 MINIMUM POSITION ADJUSTMENT P1 + 3 4 F 5 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR P T1 + 1 0/2-10 VDC INDOOR AIR SENSOR MS7XXX HONEYWELL ACTUATOR – T AQ1 – 2 5 AQ + SO+ 3 4 EF EF1 SO SR+ SR 4 W7212 C7400 OUTDOOR AIR ENTHALPY SENSOR 3 + 620 OHM RESISTOR S C L1 (HOT) L2 COOL 1 Y1 Y1 EXHAUST FAN Y2 5 W2 W2 HEAT 2 W1 W1 HEAT 1 UNOCCUPIED FAN DELAY RELAY G RH ST6008 TIMER 6 OCCUPIED FDR G RC FAN FDR R X 2 L2 1 L1 (HOT) HVAC EQUIPMENT TERMINAL STRIP COMMERCIAL THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 3 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD NOT BE REMOVED. DIFFERENTIAL ENTHALPY NOT RECOMMENDED FOR USE WITH SINGLE-STAGE COOLING SYSTEMS OR SINGLE-STAGE COOLING THERMOSTATS. 4 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE. 5 SEE WIRING DIAGRAMS FOR T7350 AND TB7220/TB8220. 6 TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE COMMERCIAL THERMOSTAT. M13659A W7212A used in single-stage cooling system with single enthalpy changeover and Honeywell actuator and time clock for occupancy 63-8594 Honeywell Economizers 128 Section 8 - W7212, W7213 and W7214 Economizer Modules TR TR1 24 Vac HOT 24 Vac COM N1 ~ N 1 2 + 3 4 F 5 MINIMUM POSITION ADJUSTMENT P1 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR P T1 + 1K 1S MS7XXX HONEYWELL ACTUATOR 0/2-10 VDC INDOOR AIR SENSOR – T 3 AQ1 – 1 2K 2 5 AQ + SO+ 3 4 EF EF1 1S1 SO SR+ SR W7212 C7400 OUTDOOR + AIR ENTHALPY S SENSOR 7 5 620 OHM RESISTOR C Y1 COOL 1 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 Y1 W Y2 R T6031 AMBIENT LOCKOUT CONTROL 50 F SETPOINT 8 L1 (HOT) L2 EXHAUST FAN 6 FAN DELAY RELAY G RH UNOCCUPIED ST6008 TIMER OCCUPIED 9 FDR G RC FAN 2 L2 FDR 4 1 L1 (HOT) R X HVAC EQUIPMENT TERMINAL STRIP T7300 OR T874 THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 3 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 4 FOR T7300 ONLY 5 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND SR+ FOR DIFFERENTIAL ENTHALPY. 6 USE THE FOLLOWING CONTACTS INSTEAD OF TIMER FOR T7300, USE A1 AND A2 TERMINALS. FOR T7350 USE AUX TERMINAL. FOR TB7220 OR TB8220 USE A TERMINAL THE TERMINALS ARE CONNECTED WHEN THERMOSTAT IS IN THE OCCUPIED MODE. 7 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE. 8 SEE WIRING DIAGRAMS FIGS 9 AND 10 FOR T7350 AND TB7220/TB8220. 9 TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE COMMERCIAL THERMOSTAT. M13660A W7212A used in two-stage cooling system with Honeywell Series 72 Actuator and time clock for occupancy 129 Honeywell Economizers 63-8594 Section 8 - W7212, W7213 and W7214 Economizer Modules 1 L2 2 L1 (HOT) ~ 1 2 + N1 3 TR TR1 24 Vac HOT 24 Vac COM N 4 F 5 ~ C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR T1 + 0/2-10 VDC INDOOR AIR SENSOR 3 – T 1 4 F P 1 2 + MINIMUM POSITION ADJUSTMENT P1 MS7XXX HONEYWELL ACTUATOR AQ1 – 2 5 AQ + SO+ 3 4 EF EF1 SO 5 SR+ MS7XXX HONEYWELL ACTUATOR SR W7212 4 UNOCCUPIED 3 ST6008 7 TIMER L1 (HOT) 1 C7400 OUTDOOR AIR ENTHALPY SENSOR + 620 OHM RESISTOR 5 S OCCUPIED L2 C 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ENSURE THAT TRANSFORMER IS SIZED TO HANDLE THE LOAD OF ALL ACTUATORS. 3 USE THE FOLLOWING CONTACTS INSTEAD OF TIMER FOR T7300, USE A1 AND A2 TERMINALS. FOR T7350 USE AUX TERMINAL. FOR TB7220 OR TB8220 USE A TERMINAL THE TERMINALS ARE CONNECTED WHEN COMMERCIAL THERMOSTAT IS IN THE OCCUPIED MODE. Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 L1 (HOT) L2 EXHAUST FAN FAN DELAY RELAY G RH FDR G FAN RC 4 5 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND SR+ FOR DIFFERENTIAL ENTHALPY. EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE. L2 FDR X R COMMERCIAL THERMOSTAT HVAC EQUIPMENT TERMINAL STRIP 6 SEE WIRING DIAGRAMS FIGS 9 AND 10 FOR T7350 AND TB7220/TB8220. 7 TIME CLOCK IS AN OPTION TO USING OCCUPIED CONTACTS ON THE COMMERCIAL THERMOSTAT. 6 M13661 W7212 controlling parallel-wired Honeywell Series 72 Actuators and time clock for occupancy 63-8594 Honeywell Economizers 1 L1 (HOT) 130 Section 8 - W7212, W7213 and W7214 Economizer Modules ~ 1 2 + 5 3 O TR TR1 24 Vac HOT 24 Vac COM N 4 F MINIMUM POSITION ADJUSTMENT P1 5 P MS7XXX HONEYWELL ACTUATOR T1 C7150B DISCHARGE AIR SENSOR + 1 0/2-10 VDC INDOOR AIR SENSOR – T AQ1 – 2 4 AQ + SO+ 3 5 EF EF1 SO SR+ SR W7214 3 C7400 OUTDOOR AIR ENTHALPY SENSOR 2 620 OHM RESISTOR + S A3 4 C A2 Y1 Y1 COOL 1 Y2 Y2 COOL 2 W2 W2 HEAT 2 W1 W1 HEAT 1 G G FAN RH L1 (HOT) L2 EXHAUST FAN L2 R RC 1 L1 (HOT) X 5 O O T7300 THERMOSTAT HVAC EQUIPMENT TERMINAL STRIP 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 EF AND EF1 ARE DRY CONTACTS IN THE LOGIC MODULE. 3 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND SR+ FOR DIFFERENTIAL ENTHALPY. 4 T7300 TERMINALS A2 AND A3 ARE CONNECTED WHEN THERMOSTAT IS IN THE UNOCCUPIED MODE. SEE T7350 AND TB7220/TB8220 WIRING. 5 W7213: B TERMINAL W7214: O TERMINAL M19618D W7213, W7214 controlling heat pump system 131 Honeywell Economizers 63-8594 Section 8 - W7212, W7213 and W7214 Economizer Modules COMMERCIAL THERMOSTAT DISCHARGE AIR SENSOR DIRECT EXPANSION COIL 2 C7046A C7232 W7212, W7213, W7214 C7150B DCV SENSOR 2 1 MIXED AIR SENSOR INDOOR FAN C7400 ENTHALPY SENSOR HONEYWELL ACTUATOR DISCHARGE AIR OUTDOOR AIR 1 C7400 1 2 ENTHALPY SENSOR FOR DIFFERENTIAL ENTHALPY, THE TWO C7400 ENTHALPY SENSORS ARE CONNECTED TO THE ECONOMIZER LOGIC MODULE—ONE IS MOUNTED IN RETURN AIR, AND THE OTHER IS MOUNTED IN OUTDOOR AIR. EXHAUST FAN USE EITHER MIXED AIR SENSOR OR DISCHARGE AIR SENSOR, NOT BOTH. RETURN AIR EXHAUST AIR M19547C Representative locations of connected economizer system devices 63-8594 Honeywell Economizers 132 Section 9 - W7340 and W7345 Economizer Module Section 9 - W7340 and W7345 Economizer Module 133 Honeywell Economizers 63-8594 Section 9 - W7340 and W7345 Economizer Module W7340 Economizer System Components DAMPER EXHAUST AIR + S RETURN AIR SENSOR RETURN AIR FROM ROOM OUTSIDE AIR SENSOR SUPPLY AIR TO BUILDING + S MIXED AIR SENSOR COILS FAN W7340 ECONOMIZER CONTROLLER WITH DEMAND CONTROL VENTILATION C7632 ROOM CARBON DIOXIDE SENSOR OEM MODBUS CONTROLLER M13836 63-8594 Honeywell Economizers 134 Section 9 - W7340 and W7345 Economizer Module 10K NTC DISCHARGE AIR SENSOR MODBUS C7232 2 DIRECT EXPANSION COIL MIXED AIR SENSOR 10K NTC C7400 2 INDOOR FAN INDOOR AIR CO2 SENSOR 1 3 ENTHALPY SENSOR DISCHARGE AIR OUTDOOR AIR M7215 MOTOR WITH W7340 ECONOMIZER LOGIC MODULE 1 C7400 1 3 FOR DIFFERENTIAL ENTHALPY, THE TWO C7400 ENTHALPY SENSORS ARE CONNECTED TO THE ECONOMIZER MODULE—ONE IS MOUNTED IN THE RETURN AIR DUCT, AND THE OTHER IS MOUNTED IN THE OUTDOOR AIR DUCT. DIFFERENTIAL ENTHALPY CONTROL PROVIDES GREATER ENERGY SAVINGS THAN SINGLE ENTHALPY CONTROL. ENTHALPY SENSOR EXHAUST FAN 2 USE EITHER MIXED AIR SENSOR OR DISCHARGE AIR SENSOR, NOT BOTH. 3 A C7600 HUMIDITY SENSOR, USED IN CONJUNCTION WITH A 10K NTC TEMPERATURE SENSOR CAN BE USED INSTEAD OF A C7400 ENTHALPY SENSOR. FOR DRY BULB CONTROL, USE ONLY A 10K NTC TEMPERATURE SENSOR. EXHAUST AIR RETURN AIR M22814 Representative Locations of Connected W7340 Economizer System Devices 10K NTC DISCHARGE AIR SENSOR 1 MODBUS DIRECT EXPANSION COIL 10K NTC INDOOR FAN DISCHARGE AIR MIXED AIR SENSOR 1 1 OUTDOOR AIR M7215 MOTOR WITH W7345 ECONOMIZER LOGIC MODULE EXHAUST FAN EXHAUST AIR 1 USE EITHER MIXED AIR SENSOR OR DISCHARGE AIR SENSOR, NOT BOTH. RETURN AIR M22822 Representative Locations of Connected W7345 Economizer System Devices 135 Honeywell Economizers 63-8594 Section 9 - W7340 and W7345 Economizer Module W7340 and W7345 Components The W7340 is a full enthalpy economizer used in an OEM unit to provide a totally integrated control system. bulb temperature and humidity, allowing use of outdoor air at higher temperatures for free cooling when humidity is low. The W7345 provides temperature (OAT) control only; it does not have an option for a RAT, DCV sensor or exhaust control. The logic module functions as a first stage of cooling and provides maximum energy savings during the cooling cycle. The logic module automatically locks out free cooling during heating and holds the outdoor air damper at the DCV minimum setting. The W7340, when wired as shown below responds to a signal from a modified Modbus command. This system uses C7400 Solid State Enthalpy Changeover Sensor(s). The C7400 Enthalpy Sensors respond to both dry Table 1 details the input/output (I/O) logic of the W7340. The logic module energizes the Unit Control and Indoor Fan contacts, and operates according to Table 1. Table 1. W7340 Economizer I/O Logic. Inputs Outputs Enthalpya DCV Below set Above set a b Outdoor High Return Low Low High High Low Low High Y1b On On On On On On On On Y2b On Off On Off On Off On Off Compressor Stage 1 Stage 2 On On On Off On Off Off Off On On On Off On Off Off Off Damper Minimum position Modulatingc Modulatingd Modulatinge For single enthalpy control, the module compares outdoor enthalpy to the ABCDE setpoint. If both stages of cooling are off, the system is off and the damper is: — At DCV minimum position if DCV is below setpoint. — Modulating if DCV is above setpoint. c Modulation based on mixed air sensor signal, modulating between DCV minimum position and 100% open. Modulation based on DCV signal, limited by minimum position. e Modulation based on the greater of the DCV and mixed air sensor signals. d 63-8594 Honeywell Economizers 136 Section 9 - W7340 and W7345 Economizer Module MOD BUS – MOD BUS + 2-10 Vdc FEEDBACK OUTPUT 2-10 Vdc CONTROL SIGNAL INPUT M7215 24 VAC TR1 TR W7340 MOD BUS POWER EXHAUST CONTACTOR – C7600C OUTDOOR AIR HUMIDITY 3 MIXED AIR TEMP SENSOR 10K NTC TR TR1 3 L2 1 + P DCV 3 RAH MAT EXF + L1 + + DCV SETPOINT E OAH A RAT MIN POS/ DCV MIN – – P1 + – 2-10 Vdc CONTROL SIGNAL OUTPUT C D B OAT + – 2-10 Vdc FEEDBACK INPUT 24 VAC – + RETURN AIR TEMP SENSOR 10K NTC – DCV SENSOR (0-10 Vdc) S963B 2 R OUTDOOR AIR TEMP SENSOR 10K NTC C7600C RETURN AIR HUMIDITY 3 CCW OPEN CW CLOSE B W 1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 OPTIONAL REMOTE MINIMUM POSITION POTENTIOMETER. 3 WHEN USING C7400 ENTHALPY SENSORS, CONNECT THE ENTHALPY SENSOR TO THE HUMIDITY SENSOR TERMINALS. LEAVE THE TEMPERATURE SENSOR TERMINALS EMPTY. M23875 W7340 Typical Wiring MOD BUS – MOD BUS + 24 VAC TR1 TR M7215 W7345 MOD BUS – L1 + L2 1 P1 TR + TR1 – 24 VAC D A E MAT B P C MINIMUM POSITION S963B 2 R MIXED AIR TEMP SENSOR 10K NTC CCW OPEN CW CLOSE B W 1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 OPTIONAL REMOTE MINIMUM POSITION POTENTIOMETER. M23876 W7345 Typical Wiring 137 Honeywell Economizers 63-8594 Section 9 - W7340 and W7345 Economizer Module W7340 only To measure enthalpy, the logic module accepts signals from either: • C7600C Humidity and 10K NTC temperature sensors. • or a C7400 Enthalpy Sensor. • OR from the OEM controller vis a modified Modbus communications link. When using C7400 Enthalpy Sensors; connect the enthalpy sensors to the humidity sensor terminals; leave the temperature sensor terminals empty. • Use C7400A sensor with W7340A or W7340B. • Use a C7400C sensor with W7340C. The local method (changing configuration from Modbus) of configuring the Economizer for enthalpy or humidity sensors is: • Short out the external minimum damper position terminals during the first three seconds after boot-up will cause the LED to go solid on within 5 seconds. • Maintain the short for another 5 seconds will cause LED to flash quick pulses, indicating the type of configuration. • 2 pulses between off periods indicates the Economizer is configured for Humidity sensors. 3 pulses means it is configured for Enthalpy sensors. The configuration can be toggled between Humidity and Enthalpy by releasing the short for approximately 5 seconds, until the LED goes solid again, and then reapplying the short for another 5 seconds. The toggling is indicated by the new LED flash sequence. This can be performed as many times as desired, and the most recent configuration will be saved when the short is removed for over 10 seconds. 63-8594 Honeywell Economizers 138 Demand Control Ventilation (DCV) Sensor Input (W7340 only) The DCV sensor can be any sensor that provides a 2-10 Vdc output over a range of 500 to 1500 ppm of CO2. The DCV signal modulates the outdoor damper to provide ventilation based on occupancy. The W7340A and B modules do not have the ability to set the outdoor air damper to a maximum position for DCV, they incorporate a minimum position setting that defaults to 20% but can be overridden using the on-board pot or the modified Modbus communication link to a maximum of 50% open. The maximum position sets the damper position to a position that the damper goes to if the CO2 sensor fails. If the minimum position set point is higher than the DCV maximum position, on sensor failure, the damper goes to the higher of the two of DCV maximum and minimum position setting. There is no limit on the damper position on a call from the CO2 sensor (DCV). It can go 100% open. The W7340C DCV economizer logic module has the ability to set DCV minimum damper and minimum position. The DCV minimum position is set to ventilate the building contaminants and the minimum position is set to ventilate for the building contaminants and the building occupants. The installer sets the damper DCV minimum position and the minimum position based on the design occupancy and cfm of outdoor air requirements for the space. The damper will modulate open between the DCV minimum damper position and the minimum position based on input from a CO2 sensor. The damper will not drive 100% open on a call for ventilation, but can drive 100% open on a call for cooling. If the CO2 sensor fails the damper Section 9 - W7340 and W7345 Economizer Module will drive to the minimum position ventilating for building contaminants and the building occupants. DAMPER POSITION 100% OPEN The W7340C does not have a separate potentiometer to select the new DCV minimum damper position. The following procedure allows the installer to set the new DCV minimum position. DCV MIN POSITION CODE VENTILATION RATE MIN POS DCV Minimum and Minimum Position Damper Set Up Set up instructions for W7340C DCV damper positions: 0% OPEN 450 PPM 800 PPM 2000 PPM CO2 LEVEL NORMAL OPERATION WITHOUT DCV CO2 SENSOR ONLY DCV ECONOMIZER FULL OCCUPANCY DCV ECONOMIZER 1. Remove RAT sensor from RAT terminals. M23972 2. Connect CO2 sensor to DCV terminals. 3. Apply power to economizer logic module. W7340 Demand Control Ventilation 4. Wait 10 to 15 seconds for the CO2 sensor to initialize. Short RAT terminals. The W7215 and W7212 have minimum position for the Building contaminants and DCV maximum for the total ventilation required by design. 5. Remove CO2 sensor from DCV terminals. 6. DCV LED will blink 2 times. If LED does not blink, cut power to economizer logic and repeat steps 1-5. 7. Set DCV minimum position using MIN POS/DCV MIN potentiometer. 8. Remove RAT short. The W7340C has different labels for the same functions. DCV minimum is the same as the W7212 minimum position and the minimum position for W7340C is the DCV maximum on the W7212. It is VERY IMPORTANT to know the difference between the various suppliers equipment as what they are referring to in their control language. 9. DCV minimum position is saved to memory and DCV LED blinks 5 times. 10. Turn off power to economizer logic module. 11. Connect RAT sensor. Settings and Adjustment 12. Turn power on to economizer logic module. W7345 13. Set minimum position using MIN POS/ DCV MIN IMPORTANT Steps 3-8 must be completed within 3 minutes after power up otherwise the configuration process will be terminated, no changes will be saved and you will need to repeat steps 1-13. 139 Potentiometers located on the face of the W7345, provide adjustments for Minimum Damper Position parameters (see below). Honeywell Economizers 63-8594 Section 9 - W7340 and W7345 Economizer Module MINIMUM DAMPER POSITION - MAT MIN POS/DCV MIN DAMPER POSITION ExF DRY BULB CHANGEOVER SETPOINT 2-10 VDC DAMPER POSITION 2-10 VDC DAMPER POSITION OVERRIDE MAT + _ OAH OPEN - OAT MIN POS/ DCV MIN RAT C DEMAND CONTROL VENTILATION SETPOINT C B D A E B + _ RAH D A E DCV 500 MBUSP P1 ENTHALPY CHANGEOVER SETPOINT STATUS LED MIN POS/ DVC MAX RAT + OPEN STATUS LED OAT + MBUS+ P TR1 24V COM P1 DCV SETPOINT 1500 MBUSMBUS+ TR1 24V COM TR 24V AC TR 24V AC M23877 M23878 Location of W7345 potentiometers and LED Location of W7340 potentiometers and LED W7340 Using the DCV potentiometer, the setpoint can be adjusted until three minutes after powering the device. Through the Modbus, the DCV setpoint can be modified at any time. If the DCV potentiometer is changed after the three minute power-up time, no change to the DCV setpoint will occur unless power is removed from the device then reapplied. If the mixed air temperature drops to 45°F (7°C), the mixed air sensor overrides the DCV sensor and closes the damper to DCV minimum position to protect the hot or chilled water coils from freezing. When the mixed air temperature rises to 48°F (9°C), control reverts to normal operation. Exhaust Setpoint (W7340 only) The exhaust setpoint determines when the exhaust fan will run based on the damper position, this function is the same as the exhaust setpoint on the W7215 and W7212 except, as shipped from the factory, the W7340 uses an exhaust setpoint of 25%. When the damper position is greater than 25% open (from fully closed), the logic module calls for exhaust. When the damper position is below 22% open, the relay is de-energized. The W7340C has an E curve in addition to the A, B, C and D curves. See the chart below showing location of E curve on Psychrometric chart. 63-8594 Honeywell Economizers 140 Section 9 - W7340 and W7345 Economizer Module 46 85 90 95 100 105 110 (29) (32) (35) (38) (41) (43) 44 CONTROL CONTROL POINT APPROX. °F (°C) CURVE AT 50% RH 73 (23) A 70 (21) B 67 (19) C 63 (17) D 55 (13) E TY UM RE LA TIV EH 32 PE R U 30 70 (21) 22 60 70 80 10 0 90 HA 65 (18) 24 EN T 26 28 LP Y— BT IDI 36 75 (24) PO UN 34 D D RY AI 38 R (% ) 40 42 80 (27) 20 50 60 (16) 40 A 16 14 50 (10) 12 45 (7) 40 (4) 30 18 55 (13) B C 20 D E 10 35 (2) E 35 (2) 40 (4) 45 (7) 50 (10) B A D C 1 55 60 65 70 75 80 85 90 95 100 105 110 (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43) APPROXIMATE DRY BULB TEMPERATURE— °F (°C) 1 HIGH LIMIT CURVE FOR W7210D, W7212, W7213, W7214, W7340C. M23879A W7340 Performance Characteristics for Enthalpy Changeover Settings 141 Honeywell Economizers 63-8594 Section 9 - W7340 and W7345 Economizer Module Wiring for W7340 and W7345 MOD BUS – MOD BUS + 2-10 Vdc FEEDBACK OUTPUT 2-10 Vdc CONTROL SIGNAL INPUT M7215 24 VAC TR1 TR W7340 MOD BUS POWER EXHAUST CONTACTOR – C7600C OUTDOOR AIR HUMIDITY 3 MIXED AIR TEMP SENSOR 10K NTC TR TR1 3 L2 1 + P DCV 3 RAH MAT EXF + L1 + + DCV SETPOINT E OAH A RAT MIN POS/ DCV MIN – – P1 + – 2-10 Vdc CONTROL SIGNAL OUTPUT C B D OAT + – 2-10 Vdc FEEDBACK INPUT 24 VAC – + RETURN AIR TEMP SENSOR 10K NTC – DCV SENSOR (0-10 Vdc) 2 S963B R OUTDOOR AIR TEMP SENSOR 10K NTC C7600C RETURN AIR HUMIDITY 3 CCW OPEN CW CLOSE B W 1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 OPTIONAL REMOTE MINIMUM POSITION POTENTIOMETER. 3 WHEN USING C7400 ENTHALPY SENSORS, CONNECT THE ENTHALPY SENSOR TO THE HUMIDITY SENSOR TERMINALS. LEAVE THE TEMPERATURE SENSOR TERMINALS EMPTY. M23875 W7340 Typical Wiring MOD BUS – MOD BUS + 24 VAC TR1 TR M7215 W7345 MOD BUS – L1 + L2 1 P1 TR + TR1 – 24 VAC D A E MAT B P C MINIMUM POSITION S963B 2 R MIXED AIR TEMP SENSOR 10K NTC CCW OPEN CW CLOSE B W 1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 OPTIONAL REMOTE MINIMUM POSITION POTENTIOMETER. M23876 W7345 Typical Wiring. 63-8594 Honeywell Economizers 142 Section 10 - Sensors for Economizer Modules Section 10 - Sensors for Economizer Modules Temperature C7046 C7650 C7150 Carbon Dioxide Enthalpy C7242 C7632 C7400 C7232 143 Honeywell Economizers 63-8594 Section 10 - Sensors for Economizer Modules Sensor Features Sensor Series Type of Sensor Application C7046 Temperature Discharge Air C7150 Temperature Comments Mixed Air OEM OEM For Use with W957F C7400 Enthalpy Sensor Enthalpy Changeover OEM OEM OEM C7650 C7242 Temperature Carbon Dioxide C7232 Dry Bulb Changeover Indoor Wall Mount Indoor Wall Mount Indoor Wall Mount Indoor Wall Mount Duct Mount Duct Mount Portable Wall Mount Duct Mount Outside Air Indoor Wall Module Indoor Wall Module Indoor Wall Mount Indoor Wall Mount Duct Mount Duct Mount Duct Mount Duct Mount C7632 Wall Mount Duct Mount 63-8594 Honeywell Economizers 144 OEM Display, Relay Output No Display, Relay Output Display No Display Display No Display Display, Batteries Display Display Display, Relay Output No Display, Relay Output Display, No Honeywell Logo, Relay Output No Display, No Honeywell Logo, Relay Output Display No Display Display, No Honeywell Logo No Display, No Honeywell Logo No Display, No Adjustment Settings No Display, No Adjustment Settings Specific Product Number C7046A1004 C7046A1038 C7150B1004 C7150B1012 C7150B1020 C7150B1038 C7400A1004 C7400A1012 C7400A1038 C7400A1046 C7650A1001 C7650A1027 C7242A1030 C7242A1048 C7242A1014 C7242A1022 C7242B1012 C7242B1020 C7242C1002 C7242D1000 C7242D1018 C7242E1007 C7232A1008 C7232A1016 C7232A1024 C7232A1032 C7232B1006 C7232B1014 C7232B1022 C7232B1030 C7632A1004 C7632B1002 Section 10 - Sensors for Economizer Modules Type of Sensors for Economizer The C7400 enthalpy sensor combines temperature and humidity measurements into a single device. The output is 4 to 20 mA. All sensing elements are solid state electronics which have been determined to be durable over more than fifteen years of usage. There are no setpoints on the sensor since all adjustments are done on the control module. C7400 Enthalpy In some dry, arid climates it may be sufficient to use a dry bulb sensor in place of a C7400 enthalpy sensor to achieve significant savings. The output of the sensor has large dead bands and should only be used in climates where the RH never gets above 5%. The C7650 solid state temperature sensor is used in these applications. The output is 10 to 20 mA. It should not be used with the H705 or the W7459D, W6210D or W7210D advanced economizer modules. C7650 Temperature The W7459, W6210, W7210, W6215 and W7215 modules are all provided with sensor connections for either a mixed or supply air sensor to modulate the mixed air dampers. Either the C7046A or C7150B can be used for this function since the resistance curves for both are identical. The C7046A is 8 inches (20 cm) long which makes it a better selection for larger air handlers than the single point C7150B. When installing the C7150B use a simple smoke bomb to determine air flow and locate the sensor in a location where the OA and RA have the best mix. Do not use a smoke bomb in an occupied building. The DCV economizer modules W6215A, W7212, W7340B, W7215A and W7460A can be used with any indoor air content sensor with a 0 or 2 to 10 Vdc output. The W7460B and W7215B are equipped with provisions for indoor and outdoor air content sensors. For most indoor applications Honeywell C7232, C7632 or C7242 carbon dioxide sensors will be used. They are available in either wall or duct mount versions with or without display. 145 C7046 Temperature C7150 Temperature C7242 Carbon Dioxide C7632 Honeywell Economizers 63-8594 Section 10 - Sensors for Economizer Modules C7650 Temperature Sensor mA OUTPUT 19 LIGHT ON 18 D SETPOINT DEADBAND 17 LIGHT OFF 16 LIGHT ON C SETPOINT DEADBAND 15 LIGHT OFF 14 LIGHT ON B SETPOINT DEADBAND 13 LIGHT OFF 12 LIGHT ON A SETPOINT DEADBAND 11 LIGHT OFF 10 9 85 90 70 80 60 65 55 75 13 16 18 21 24 27 29 32 C7650 SETPOINT CHART THE SETPOINT LINES ON THE CHART ARE AN INDICATION OF OUTSIDE DRY BULB TEMPERATURES AT WHICH SWITCHING OF THE DAMPERS FROM RETURN AIR TO OUTSIDE AIR OCCURS. IT IS INDICATED ON THE W7459 MODULE BY THE FREE COOLING LIGHT. DEG. F DEG. C 40 4 45 7 50 10 95 35 100 38 M25284 The setpoint dial on the logic modules is labelled A, B, C and D to correspond to various levels on the psychrometric chart on page 52. If the C7650 temperature sensor is used in place of the C7400 enthalpy sensor, the setpoints change to the settings indicated on the chart above. Example: When the B setpoint is chosen, the module will open the 63-8594 Honeywell Economizers 146 outside air damper at approximately 72°F (22°C) when the temperature is decreasing and will close the damper to minimum position and turn on the compressor at 82°F (28°C) when the temperature is increasing. NOTE: The temperature has to drop below 72°F (22°C) before the economizer will open the damper for free cooling. Section 10 - Sensors for Economizer Modules C7150 and C7046 Mixed and Supply Air Sensors OHMS 6200 6000 5800 5600 5400 5200 5000 4800 4600 4400 4200 4000 3800 3600 3400 3200 3000 OHMS at 77 DEG. F (25 C) 3000 2800 2600 2400 2200 2000 1800 1600 1400 50 DEG. C 10 DEG. F 55 13 60 16 65 18 70 21 C7046A 3,000 OHM MIXED AIR OR SUPPLY AIR SENSOR 75 24 80 27 85 29 90 32 95 35 100 38 C7150B 3,000 OHM MIXED AIR OR SUPPLY AIR SENSOR M25285 This chart is for the C7046A or C7150B supply or mixed air sensors designed to be used with all of the economizer logic modules. These sensors have negative temperature 147 coefficients, as the ambient temperature at the sensor increases, the resistance of the sensor decreases. It changes 70 ohms in resistance for every 1°F (0.6°C) change in temperature. Honeywell Economizers 63-8594 Section 10 - Sensors for Economizer Modules Mixed or Supply Air Sensor Control Sequence W7459 MIXED AIR TEMPERATURE B A TR TR1 SO + SR + 60˚F (15.5 C) C 59˚F (15 C) 58˚F (14.4 C) D 57˚F (14 C) 56˚F (13.3 C) 5 55˚F (12.8 C) 1 2 3 4 T T1 54˚F (12.2 C) 53˚F (11.7 C) MINIMUM POSITION OPEN 52˚F (11.1 C) P P1 OUTSIDE AIR DAMPERS FULL OPEN UNLESS CLOSED TO MINIMUM WITH ENTHALPY CONTROLLER 51˚F (10.6 C) C7150 OR C7046 MIXED OR SUPPLY AIR SENSOR OUTSIDE AIR DAMPERS IN HOLD WHEN MIXED AIR TEMPERATURE IS BETWEEN 50.5˚FAND 55.5˚F (10 AND 13 C). 50˚F (10 C) OUTSIDE AIR DAMPERS AT MINIMUM POSITION M23926 The control sequence for the sensor connected to the mixed or supply (discharge) air temperature terminals on all of the economizer modules is basically the same. The dampers remain at the minimum position until there is a call for cooling from the commercial thermostat. If the mixed or supply air temperature is below the lower end of the setpoint range of 50°F (10°C) the outside air dampers will remain at minimum. If the 63-8594 Honeywell Economizers 148 measured temperature is within the range of 50 to 56°F (10 to 13.3 °C) the outside dampers will not be modulated open or closed. If the mixed air temperature is above 56°F (13.3°C) the outside air dampers will be modulated open until the temperature is within the range or the dampers are full open. If the enthalpy of the outside air is too high, the outside air dampers will be returned to minimum. Section 10 - Sensors for Economizer Modules Carbon Dioxide Sensor volume for a room increases when occupancy increases. When people leave the space, CO2 levels will decrease and the outside air dampers close to a more economical setting. Ventilation cost can be controlled by using CO2 sensing in addition to economizer functions. Honeywell C7632 Carbon Dioxide Sensor Carbon dioxide (CO2) is frequently used as the sensor for demand ventilation control. People exhale CO2 as they breathe. If there is a large number of people in a space the level of CO2 will increase. When a CO2 sensor is installed in the space, a signal is sent to the air handler mixed air control which modulates the outside air dampers. The required ventilation 149 An indoor air quality analysis should be done to evaluate the air quality in a building. Analysis of all compounds in addition to carbon dioxide is required to evaluate the overall healthiness of a building. Contaminants, such as volatile organic compounds, are not detected with a CO2 sensor. Complex electronic equipment is required to fully test for the presence of all the various compounds which may be in the air supply. CO2 sensor based ventilation control is a modern enhancement to economizer control circuits, not a substitute for a total professional air quality evaluation of a building. If you have a building with a high concentration of a gas other than CO2, consider using the IAQP ventilation method but always consult a professional trained in control of gases. Honeywell Economizers 63-8594 Section 10 - Sensors for Economizer Modules 63-8594 Honeywell Economizers 150 Section 11 - Checkout Section 11 - Checkout Honeywell has a checkout procedure for every economizer logic module. The checkout procedures are listed in the back of the product data sheet shipped with every economizer or can be found at customer.honeywell.com. 151 On the bottom right part of the home page (see figure shown at the left) you will find the Literature/Image Search box. Type in your Honeywell Order Specification number (W7212) and click on the red arrow. All the literature associated with the model will appear. For checkout procedures select a document with “Product Data” listed in the Type column (see image below). The checkout section is located at the back of the document. Honeywell Economizers 63-8594 Section 11 - Checkout Standard Checkout Procedure When the first line of a procedure states: “Execute step one. Checkout Preparation.” this directs you to reset the logic module to the initial checkout mode before proceeding. Checkout W7212 24 VAC POWER REMOVE JUMPER P-P1 JUMPER T-T1 N1 N P1 P EXH Set EXH Min Pos T1 T Open IAQ Max AQ1 SO+ 620 OHM 1/4W RESISTOR AQ SO SR+ TR1 24 VAC HOT 24 VAC COM + – 1 2 IAQ B C A D 0-10 VDC OUT TO ACTUATOR 24 VAC POWER (HOT) TO 1 5 IAQ MIN Free Cool SR TR 3 4 EF EF1 M23971 To checkout the operation of the W7212, W7213 or W7214: 1. Remove the MAT or DAT sensor from T-T1. 6. Provide 24 Vac to TR and TR1 7. Provide 24 Vac hot to terminal 1. 8. The motor will drive open. 2. Remove the jumper from P-P1 and place it on T-T1. 9. Remove the 24 Vac from TR and TR1 and the motor should drive close. 3. Remove the OAT and RAT sensors from SO and SO+ and SR and SR+. If using a Honeywell DCA, the + on the logic module will be connected to 3 and does not need to be connected to – since the actuators are internally connected to ground. 4. Place a 620 ohm resistor across SO and SO+ and a 620 ohm resistor across SR and SR+. 5. Connect the actuator to the + and -. 63-8594 Honeywell Economizers 152 If using two transformers make sure the transformers are tied to the same COM and are from the same power source. Section 11 - Checkout Check out C7400 with W7459, W7210 and W7212: You can check if the C7400 is within the RH and temperature range with the W7459, W7210 or W7212 logic modules by the following method. • Make sure the sensors are all connected to the logic module. • To check the return air C7400 sensor on Sr and Sr+: Measure the voltage across Sr and Ground. • To check the outdoor air C7400 sensor on So and So+: Measure the voltage across So and Ground. • You must have an accurate reading of the temperature and humidity. • Find the line on the chart on this slide for return air C7400 sensor that corresponds to the voltage you read across Sr and ground. It should intersect with the humidity and temperature of your conditions. • There is a ± 0.3 Vdc range for the sensor accuracy and above 90% RH the accuracy changes to ± 0.4Vdc. The lines and chart for the So C7400 sensor are slightly different. The reason is for a differential of the sensor inputs to the logic modules for a choice between the two sensors for differential enthalpy. To assure accuracy in reading these charts, which are small, a table is provided on the following page for ease of use. SO C7400 CHECK C7400 SO AND GND VDC 20 18 16 14 12 10 8 6 4 90 VDC 1.0 VDC 1.5 VDC 1.9 DC 2.4 V VDC 2.9 VDC 3.4 VDC 3.9 VDC 4.4 VDC 4.9 +/- .4VDC >90% RH 80 70 PERCENT 60 RELATIVE HUMIDITY 50 +/- .3VDC 40 <90% RH SR C7400 CHECK C7400 SR AND GND VDC 30 +/- .4VDC >90% RH 20 20 18 16 14 12 10 8 6 4 90 50 (10) 60 (16) 70 (21) 80 (27) TEMPERATURE ºF (ºC) 90 (32) 100 (38) 80 M23991 70 DC 1.0 V VDC 1.5 VDC 2.0 DC 2.6 V DC 3.1 V DC 3.6 V DC 4.1 V VDC 4.6 VDC 5.1 10 40 (4) PERCENT 60 RELATIVE HUMIDITY 50 +/- .3VDC <90% RH 40 30 20 10 40 (4) 50 (10) 60 (16) 70 (21) 80 (27) TEMPERATURE ºF (ºC) 153 90 (32) 100 (38) M23990 Honeywell Economizers 63-8594 Section 11 - Checkout SO <90% RH mA curve Low (-.3 Vdc) Nominal High (+.3 Vdc) > 90% RH mA curve Low (-.4 Vdc) Nominal High (+.4 Vdc) Vdc measured between SO and GND 4 0.672 0.972 1.272 6 1.158 1.458 1.758 8 1.644 1.944 2.244 10 2.13 2.43 2.73 12 2.616 2.916 3.216 14 3.102 3.402 3.702 16 3.588 3.888 4.188 18 4.074 4.374 4.674 20 4.56 4.86 5.16 4 0.572 0.972 1.372 6 1.058 1.458 1.858 8 1.544 1.944 2.344 10 2.03 2.43 2.83 12 2.516 2.916 3.316 14 3.002 3.402 3.802 16 3.488 3.888 4.288 18 3.974 4.374 4.774 20 4.46 4.86 5.26 SR <90% RH mA curve Low (-.3 Vdc) Nominal High (+.3 Vdc) > 90% RH mA curve Low (-.4 Vdc) Nominal High (+.4 Vdc) Vdc measured between Sr and GND 4 0.72 1.02 1.32 6 1.23 1.53 1.83 8 1.74 2.04 2.34 10 2.25 2.55 2.85 12 2.76 3.06 3.36 14 3.27 3.57 3.87 16 3.78 4.08 4.38 18 4.29 4.59 4.89 20 4.8 5.1 5.4 4 0.62 1.02 1.42 6 1.13 1.53 1.93 8 1.64 2.04 2.44 10 2.15 2.55 2.95 12 2.66 3.06 3.46 14 3.17 3.57 3.97 16 3.68 4.08 4.48 18 4.19 4.59 4.99 20 4.7 5.1 5.5 NOTE: The accuracy of the sensors used to measure the temperature and humidity of the environment needs to be considered. If you are close to the measurements your C7400 sensor is probably working. 63-8594 Honeywell Economizers 154 Section 12 - Simulator for W7212 Section 12 - Simulator for W7212 155 Honeywell Economizers 63-8594 Section 12 - Simulator for W7212 Honeywell created a simulator to help teach users how the product functions. The program is a 10.5 MB file that can be easily loaded onto your computer desk top. In addition there is a power point presentation that can also be downloaded from the same web page to guide you on how to use the simulator. On the picture shown below all of the white arrows are inputs to the economizer logic from sensors or a commercial thermostat. All of the red arrows denote changes (potentiometers) or settings that can be made by the user. And the black arrows are out puts of the logic module to the actuator to change the damper position or to the stages of mechanical cooling equipment and exhaust fan. M23992 To download the program: Go to http://customer.honeywell.com. From the home page, select Applications and Downloads from the drop down menu under the PRODUCTS tab. Or you can click on the PRODUCTS tab, and then click on APPLICATIONS and DOWNLOADS in the 63-8594 Honeywell Economizers 156 second row of tabs. Once you are on this page, scroll down to the Economizer logic module picture and heading. Click on the picture or “View Details” to go to the download page. Follow the instruction on the web page to download the desired file. Section 13 – Economizer Savings Estimator Section 13 – Economizer Savings Estimator 157 Honeywell Economizers 63-8594 Section 13 – Economizer Savings Estimator Honeywell has an easy to use savings estimation software that was designed by independent consulting Energy Engineers. The software allows the user to input information about the equipment on a building, type of control, occupancy schedule, cost of adding various economizer and DCV options and demand and electrical charges. With the simple click of the mouse, the software will print an estimation of the electrical and gas usage in the building and will estimate the savings and payback for the upgrade options the user has chosen. You can choose the default settings for a building type or set your own occupancy schedule and control set points for the buildings. To download the program: Go to http://customer.honeywell.com. From the home page, select Applications and Downloads from the drop down menu under the PRODUCTS tab. Or you can click on the PRODUCTS tab, and then click on APPLICATIONS and DOWNLOADS in the second row of tabs. Once you are on this page, scroll down to the Economizer logic module picture and heading. Click on the picture or “View Details” to go to the download page. Follow the instruction on the web page to download the desired file. You can choose to download all weather files for the US, Canada and California climate zones or just the files you need for your region. The savings is based on 100 years of weather data from 1900 to 2000. 63-8594 Honeywell Economizers 158 Make sure you update the cost of electricity and demand charges in your region. The current software and estimations are based on 2000 energy costs. The savings estimator evaluates the operating costs, cost savings, and payback period associated with alternate control strategies or a limited number of prototypical buildings. The program performs hourly calculations with fairly detail models of the building and equipment in order to determine the gas energy, electrical energy, and electrical demand costs. This program is not useful as an energy audit tool for a specific building. However, it does allow the user to study the impact of the following variables: • Climate • Building size • Occupancy schedule • Utility rates • Equipment type and efficiency • Cost of controls The actual costs form this program could differ significantly from those for a particular building due to differences in building specifications, equipment characterizes, specific yearly weather conditions, actual occupancy, etc. However, it is expected that the percentage cost savings associated with the alternative control strategies would be similar for similar building types. For more detailed description of the data used to calculate the cost savings, click on the “Tools” tab at the top of the first screen of the Estimator and choose “Help” Section 14 - Retrofit and Upgrades Section 14 - Retrofit and Upgrades From Honeywell T7100, T7300, T7350, T7400 or competitive commercial or residential thermostats Economizer control systems without integration of the first stage of cooling from the commercial thermostat. Economizer controls such as the W859 with temperature based remote bulb controllers as the changeover devices. Economizer control systems with an electromechanical enthalpy based control such as the H205 as the changeover device. Upgrade to Honeywell TB7220 or TB8220 commercial thermostats Solid State Economizer Controller H705, W7212 or W7215 Economizer Logic module Two C7400 enthalpy sensors. Choice of one C7150 mixed air or one C7046 supply air sensor New motor/actuator to provide modulating control if replacement is needed. Optional C7232 or C7632 carbon dioxide sensor for demand control ventilation to maximize heating and cooling season energy cost savings. Economizer control systems with single Add second C7400 enthalpy sensor for differential enthalpy sensor enthalpy such as H705 or W7459. control and increased energy cost savings. Economizer control systems without Enhances Economizer Controller demand control of ventilation (DCV) or indoor air content sensors such as H705, W7212 or W7215 economizers module W7459, or W6210 and W7210. Variable air Two C7400 enthalpy sensors. volume air handlers without occupancy Choice is one C7150 mixed air or one C7046 supply air based demand control ventilation. sensor. New motor/actuator to provide modulating control if replacement is needed. C7232 or C7632 carbon dioxide sensor for demand control ventilation to maximize heating and cooling season energy cost savings. 159 Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades TRANSFORMER L1 (HOT) MIXED AIR DAMPER MOTOR T1 L2 T2 W T675 DRY BULB HIGH LIMIT CONTROL F 110 120 W OAT 130 100 120 15 16 70 W 40 °F 170 60 R 60 140 90 B 100 80 80 R 140 F 110 120 130 100 140 180 90 R 15 80 16 70 170 60 MINIMUM POSITION CONTROL 180 B R T991 MIXED AIR CONTROL B NC C NO RELAY RC NC Y1 C NO Y2 COOLING COMMERCIAL THERMOSTAT T1 L1 COOLING CONTACTOR T2 L2 M13847 Before: Series 90 with Dry Bulb Changeover Series 90 was widely used for fifty years as the primary form of electronic temperature control. Due to the durability of these devices there are many of them still in use on rooftop air handlers throughout the world. This is a typical configuration for a dry bulb economizer. The high limit is typically set at 70 or 75°F (21 63-8594 Honeywell Economizers 160 or 24°C). A relay is used to switch the mixed air control circuit as the first stage of cooling to a minimum position when the outside air minimum position potentiometer provides ventilation by preventing full closure of the outside air dampers. Section 14 - Retrofit and Upgrades M945 DAMPER MOTOR TRANSFORMER L1 (HOT) FAN STARTER AUXILIARY CONTACT T1 L2 T2 COOLING W R FAN HIGH SPEED W 1K2 2K1 R H205 B SYSTEM SWITCH B 1K1 R COOL O AUTO MIXED AIR TEMPERATURE CONTROLLER W HEAT Y2 R B 2K 1 2 Y1 3 FAN SWITCH ON G AUTO 1K MINIMUM POSITION CONTROL RELAY COILS B 2ND STAGE HEAT W859D ECONOMIZER ASSEMBLY W2 1ST STAGE HEAT W1 T874/Q674 THERMOSTAT/SUBBASE M13848 Before: W859 Economizer With H205 The W859 is a combination of multiple control devices that is designed to be installed directly on top of a Mod III or IV Honeywell damper actuator. Included is a mixed air controller, transformer, relays for high limit switchover, minimum damper position and connections for a SPST outside air high limit. The mixed air controller capillary extends from the case of the W859 to the mixed air section. The setpoint for the mixed air temperature is on the case. 161 The outside air changeover control is added during installation and can be either dry bulb or enthalpy depending on the application. Many of these were installed on rooftop units with the schematic illustrated above using a H205 enthalpy control as the switchover device. The H205 is an electromechanical enthalpy control with a nylon humidity element. Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades M945 DAMPER MOTOR TRANSFORMER L1 (HOT) FAN STARTER AUXILIARY CONTACT T1 L2 T2 COOLING W R FAN HIGH SPEED W R B B 1K1 1K2 2K1 H705 ENTHALPY CONTROL TR TR B TR1 C SO A D SR MIXED AIR TEMPERATURE CONTROLLER TR1 R COOL 3 2 SYSTEM SWITCH 1 + O AUTO W R B 2K 1K MINIMUM POSITION CONTROL SR ENTHALPY DECREASE 1 2 3 RELAY COILS HEAT Y2 Y1 FAN SWITCH ON G AUTO W859D ECONOMIZER ASSEMBLY B 2ND STAGE HEAT W2 1ST STAGE HEAT W1 T874/Q674 THERMOSTAT/SUBBASE M13849 After: W859 with H705 If the actuator is still usable, an H705 control can be installed in place of the T675 or H205. It can be either single sensor or differential enthalpy. The actuator and other wiring can be retained. If the actuator is defective or in need of replacement then refer to the wiring 63-8594 Honeywell Economizers 162 diagrams in this manual for the W7212 or W7215. The selection of an actuator is dependent on the torque requirements. A M7415 motor can be used for low torque and a direct coupled or Mod IV damper actuator for medium or high torque applications. Section 14 - Retrofit and Upgrades W973 SINGLE ZONE PANEL 2 1 HEAT R F 110 120 140 90 15 80 16 70 170 60 3 HEAT COOL 3 COOL 1 COOL 2 1 COOL MOD-HEAT BH RH SENSOR 180 STAT C +20 H 3 4 2 COOLING STAGES MOD-COOL RC BC WC 24 VAC ECONO N SERIES 90 MIXED AIR DAMPER ACTUATOR T T1 LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) 3 COOL 2 WH W 130 100 5 1 TR TR W B Y R 24 VAC TRANSFORMER W T1 R T2 B 3 4 2 1 5 T7067 THERMOSTAT MINIMUM POSITION CONTROL H205 ENTHALPY CONTROL W 100 80 120 R 60 40 °F 1 2 140 3 M13850 Before: W973 With H205 Control The W973 is a sequencing panel for Single zone systems that can provide multiple modulating or two-position output stages of control plus a modulating economizer. A dry bulb high limit and a H205 enthalpy control were widely used in the economizer circuit. If 163 they are replaced with a solid state economizer controller, the actuator for the dampers can be retained or replaced. In the replacement illustration on the next page a direct coupled actuator is used. Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades W973 SINGLE ZONE PANEL 2 1 HEAT R F 110 120 130 100 140 90 15 80 16 70 170 60 3 HEAT W LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) 180 3 COOL 2 1 COOL COOL 3 COOL 1 COOL 2 WH MOD-HEAT BH RH SENSOR T T1 3 4 2 3 MOD-COOL RC BC WC STAT C +20 H N 4 1 2 5 24 VAC TR TR 24 VAC COOLING STAGES ECONO W B 24 VAC TRANSFORMER Y R 1 5 T7067 THERMOSTAT ML7275, ML7285 MIXED AIR ACTUATOR 60 30 90 W7215 ECONOMIZER MODULE RED 60 24 VAC HOT 24 VAC TR HOT 30 500 0 BLACK 500 WHITE 24 VAC COM TR1 COM + SO + SR RELAYS 1K AND 2K ENERGIZE IF OUTDOOR ENTHALPY EXCEEDS RETURN AIR ENTHALPY + 5 1S 1 2 3 4 S + _ + S C7400 OUTDOOR ENTHALPY SENSOR C7400 RETURN ENTHALPY SENSOR 1K 2K M13851 After: W973 with W7215 Economizer Module Another option used widely in the field was to add a signal transducer on the economizer output of the W973. A signal is sent to a W7212 or W7215 to open the outside dampers if the enthalpy is suitable. The stages of cooling are sequenced through the W973 panel. 63-8594 Honeywell Economizers 164 Section 14 - Retrofit and Upgrades W973 SINGLE ZONE PANEL 2 1 HEAT R F 110 120 130 100 140 90 15 80 16 70 170 60 3 HEAT W LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) 180 3 COOL 2 1 COOL COOL 3 COOL 1 COOL 2 WH MOD-HEAT BH RH SENSOR T T1 3 MOD-COOL RC BC WC STAT C +20 H N 4 1 2 5 24 VAC 24 VAC COOLING STAGES ECONO TR TR W B Y R _ + TRANSDUCER 3 4 2 24 VAC 1 5 T7067 THERMOSTAT 24 VAC TRANSFORMER 24 VAC TRANSFORMER ML7275, ML7285 MIXED AIR ACTUATOR 60 30 90 W7215 ECONOMIZER MODULE RED 60 24 VAC HOT 24 VAC TR HOT 30 500 0 BLACK 500 WHITE 24 VAC COM TR1 COM + SO + SR RELAYS 1K AND 2K ENERGIZE IF OUTDOOR ENTHALPY EXCEEDS RETURN AIR ENTHALPY + 5 1S 1 2 3 4 S + _ + S C7400 OUTDOOR ENTHALPY SENSOR C7400 RETURN ENTHALPY SENSOR 1K 2K M13852 W7215 Module With W973 Panel and Signal Transducer 165 Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades M955 MIXED AIR DAMPER ACTUATOR LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) 24 VAC TRANSFORMER T1 F 110 120 130 100 R R1 170 60 B1 W 15 16 70 T2 W1 140 90 80 180 24 VAC TRANSFORMER 24 VAC TRANSFORMER H205 ENTHALPY CONTROL W7100 SUPPLY AIR CONTROLLER COOL 6 B GND TR C 24 VAC TR 1 2 3 W SETPOINT °F 90 40 85 R ECONO COOL B 50 C 80 55 75 Y 10 W 80 70 65 B 9 R 140 8 COOL # STAGES 20 7 MINIMUM POSITION CONTROL C RESET °F 60 °F STAGE RESISTOR 6 P P1 A HEAT 80 20 SENSOR 15 60 50 COOL 4 5 COOL 3 B 30 70 T T1 C7100 SUPPLY AIR SENSOR RESET COOL 5 4 CHANGEVOER 120 40 A 60 COOL COOL 6 5 45 B 100 A C 40 10 A COOL REMOTE SETPOINT COOL 3 2 B CONTROL BAND C °F 5 4 A 2 16 4 14 3 2 6 12 1 SATELLITE 10 8 COOL 1 COOL 2 B C A COOL 1 M13853 Before: W7100 with H205 Economizer Control The W7100 is a multiple stage supply air controller available as cooling only, heating only or heating and cooling. Modulating economizer and heat/cool outputs are also provided. The economizer output is sequenced at a setpoint slightly below the cooling stages for maximum efficiency. It is widely used for control of variable air volume air handlers. In this diagram a H205 63-8594 Honeywell Economizers 166 economizer control is used to return the outside air dampers to minimum when the outdoor enthalpy is high. If a H705 is used the output wiring is identical. On the next page the H205 is replaced with a W7215 enhanced economizer module. You can also replace it with a W7212 economizer module using the wiring shown in the diagram. Section 14 - Retrofit and Upgrades F 110 120 130 100 140 90 R 15 80 16 70 170 60 W 180 LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) 24 VAC TRANSFORMER W7100 SUPPLY AIR CONTROLLER COOL 6 B GND TR C 24 VAC TR W RESISTOR TO ELIMINATE ECONOMIZER DELAY SETPOINT °F 90 40 85 R ECONO COOL B 50 C 80 55 75 Y COOL 4 B CHANGEVOER 9 C RESET °F 8 COOL # STAGES 20 7 STAGE RESISTOR RESET 6 80 T T1 C7100 SUPPLY AIR SENSOR P P1 15 20 5 COOL B 50 C 40 10 COOL 3 A COOL REMOTE SETPOINT 2 B COOL 2 CONTROL BAND C °F 5 A 2 16 4 4 14 3 2 SATELLITE COOL 8 10 1 COOL 1 B C 6 12 1 24 VAC TRANSFORMER 3 30 60 COOL 4 A HEAT 70 SENSOR COOL 5 A 60 70 65 10 5 45 B COOL 6 A A W7215 ECONOMIZER MODULE RED 60 30 90 60 30 500 BLACK 0 24 VAC HOT 24 VAC TR HOT 24 VAC COM TR1 COM + SO + SR RELAYS 1K AND 2K ENERGIZE IF OUTDOOR ENTHALPY EXCEEDS RETURN AIR ENTHALPY + 5 1S 1 2 3 4 S 500 WHITE + _ + S C7400 OUTDOOR ENTHALPY SENSOR C7400 RETURN ENTHALPY SENSOR 1K ML7275, ML7285 MIXED AIR ACTUATOR 2K M13854 W7215 Economizer Module with W7100 Controller 167 Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades F 110 120 130 100 TO POWER SUPPLY 140 90 R 15 80 W 16 70 170 60 180 LOW O.A. AMBIENT COMPRESSOR LOCKOUT STAT (OPTIONAL) TO POWER SUPPLY 24 VAC TRANSFORMER W7100 SUPPLY AIR CONTROLLER COOL 6 B GND TR C 24 VAC TR W SETPOINT °F 90 40 85 R ECONO COOL B 50 C 80 55 75 Y COOL 4 B CHANGEVOER 9 C RESET °F 8 COOL # STAGES 20 7 STAGE RESISTOR RESET 6 80 T T1 C7100 SUPPLY AIR SENSOR P P1 15 20 5 COOL B 50 C 40 10 COOL REMOTE SETPOINT B C °F 4 14 2 SATELLITE COOL 8 10 1 B C 6 12 1 COOL 2 A 2 16 3 24 VAC 2 CONTROL BAND 4 + TRANSDUCER COOL 3 A 5 _ 3 30 60 COOL 4 A HEAT 70 SENSOR COOL 5 A 60 70 65 10 5 45 B COOL 6 A COOL 1 A W7215 ECONOMIZER MODULE RED 60 30 90 60 30 500 BLACK 0 24 VAC HOT 24 VAC TR HOT 24 VAC COM TR1 COM 24 VAC TRANSFORMER + SO + SR RELAYS 1K AND 2K ENERGIZE IF OUTDOOR ENTHALPY EXCEEDS RETURN AIR ENTHALPY + 5 1S 1 2 3 4 S 500 WHITE + _ + S C7400 OUTDOOR ENTHALPY SENSOR C7400 RETURN ENTHALPY SENSOR 1K ML7275, ML7285 MIXED AIR ACTUATOR 2K M13855 After: W7100 and Signal Transducer with W7215 Module 63-8594 Honeywell Economizers 168 Section 14 - Retrofit and Upgrades HONEYWELL SERIES 72 ACTUATOR 24 VAC HOT W7215A 24 VAC COM (ML7275, ML7285, ML7295A,C M7275, M7285) TR TR1 SO + SR + S + 620 OHM RESISTOR 5 1S 1K 4 + 2 3 4 T T1 P P1 Q Q1 2K + 2-10V OUT Ð 1 MINIMUM POSITION ADJUSTMENT 6 C7150B MIXED AIR OR C7046A DISCHARGE AIR SENSOR 1S1 Ð C7400 OUTDOOR AIR ENTHALPY SENSOR 5 FREE COOL T775 CONTROLLER 7 C + NO C NC SD EXHAUST FAN AC INDOOR FAN PG NO C NC 2-10 VDC INDOOR AIR SENSOR SD1 SHUT DOWN AC1 AIR CHANGE PG1 PURGE W T6031 AMBIENT LOCKOUT CONTROL 50¡ F SETPOINT C Y1 COOL 1 Y2 COOL 2 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 2 ACTUATOR SPRING-RETURNS CLOSED WHEN FAN IS NOT RUNNING. 3 ENSURE THAT EQUIPMENT TRANSFORMER IS SIZED TO HANDLE THE EXTRA LOAD OF THE ECONOMIZER AND ACTUATOR. 5 Ð AQ1 + UNIT CONTROL R 4 AQ NC C NO NC C NO 1 MAXIMUM POSITION ADJUSTMENT UNOCCUPIED ST6008 TIMER OCCUPIED 2 G 3 FAN L2 1S IS AN ELECTRONIC SWITCH THAT CLOSES WHEN POWERED BY A 24 VAC INPUT. 1 L1 (HOT) R FOR THE ML7295A,C, USE THE 4-20 MA MODEL ACTUATOR. THESE MODELS HAVE 500 OHM INPUT IMPEDENCE THAT ALLOWS THE ACTUATOR TO ACCEPT A 2-10 VDC SIGNAL. HVAC EQUIPMENT TERMINAL STRIP 6 FACTORY INSTALLED 620 OHM, 1 WATT, 5% RESISTOR SHOULD BE REMOVED ONLY WHEN A C7400 ENTHALPY SENSOR IS ADDED TO SR AND + FOR DIFFERENTIAL ENTHALPY. 7 T775 REQUIRES A MINIMUM OF THREE RELAY OUTPUTS: TWO FOR COOLING AND ONE FOR FAN CONTROL. M13845 After: T775 Series 2000 Controller with the W7212 Module The W7100 or W973 controllers may be replaced with a T775 series 2000 electronic controller directly. The series 2000 has from 1 to 12 output stages depending on the model. See the T775 product literature for details. 169 Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades How replace an H205 or Barber Colman TH2 Electromechanical Enthalpy control with an H705 Procedure 7. Install two wires from a 24 Vac power source to the TR and TR1 power terminals of the H705. The H705 draws only 5 VA, so a separate transformer should not be required. Use 1/4 in. female quick connects to attach the two power wires to the H705. In general, a contractor can replace an electromechanical enthalpy control with an H705 by following these steps: 1. Disconnect power from the HVAC equipment. To add differential enthalpy; 2. Remove access panel and locate the electromechanical control. 3. Remove the three wires from the control and label them: yellow is terminal 1 and normally open; red is terminal 2 and common; blue is terminal 3 and normally closed. 4. Remove the electromechanical control. 5. Connect the three wires to the SPDT switch of the H705. The H705 terminal designation matches the H205 and the THC-2. Use 1/4 in. female quick connects to attach the three wires to the H705. 6. Install the H705 in the same location as the removed H205 or THC-2 if they were case and cover models. If non-case and cover models are being replaced, use the mounting bracket provided with the H705. 63-8594 Honeywell Economizers 170 8. Locate a C7400 in the return air duct and attach to duct work with sheet metal screws. 9. Connect two wires from the C7400 terminals SR and + to the terminals SR and + of the H705. Use 1/4 in. female quick connect to attach the wires to the H705 and C7400. 10. Re-apply power to the HVAC unit. 11. Reset or re-check the minimum position and ventilation to make sure it meets code and the ventilation required for the space. Section 14 - Retrofit and Upgrades Economizer Systems Quick Selection Guide ECOMOMIZER SYSTEM SELECTION NO (Standard) INCLUDE Demand Control Ventilation (DCV)? YES (Advanced) Motor Type Foot Mount 25 lb-in. Torque DCA 44 lb-in. Torque Foot Mount 60 lb-in. Torque Motor M7415 M9175 MS7505 W7210 M7285 M7286 W7210 M9185 M9186 H705, W7210b DCA MS7510 88 lb-in. Torque DCA MS7520 175 lb-in. Torque a b Logic Module W7459A,D H705 or W7210b Sensors Enthalpy: C7400a with C7150 Temperature: C7650 with C7150 W7210 Motor Type Foot Mount 25 lb-in. Torque DCA 44 lb-in. Torque Foot Mount 60 lb-in. Torque M13300 Motor M7415 M7215 M9175 MS7505 M7285 M7286 M9185 M9186 DCA MS7510 88 lb-in. Torque DCA MS7520 175 lb-in. Torque W7210 Logic Module W7460 W7212/13/ 14 Sensors Enthalpy: C7400a with C7150 W7215b, W7212b, W7213/14 W7215 Temperature: C7650 with C7150 CO2: C7232 W7215, or C7632 W7212, W7213/14 W7215, W7212b, W7213/14b W7215, W7212, W7213/14 W7215, W7212, W7213/14 Enthalpy sensor. Use two for differential enthalpy and one for single enthalpy. For Dry Bulb only, use C7650 instead. To operate a Series 90 motor, the W7210 and W7215 require a Q7230 interface module or the proper resistor combination (included in the 4074EJM resistor kit), see form 63-2544 for details. NOTE: Series 90 Mod Motors™ can be retrofit using W7210, W7212 or W7215 Economizer Logic Modules and a Q7230 or the proper resistor combination. Refer to form 63-2544 for details on using Economizer Logic Modules with Series 90 motors. 171 Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades Logic Module Details Model Standard ISI OSI Enthalpy High Limit Exhaust Fan Setpoint Shutdown and Air Change Purge Motors Controlled OS Number H705a W749 No No None None No No Series 90 H705A1003 No No None No No M7415 W7210 No No No Yes No Yes None No W7459A1001 W7459D1005 W7210A1001 W7210D1005 Advanced W7212 Yes b Yes W7213/14 W7215 Yes W7460 Yes a b No No No Yes No Yes No No No No Series 72 Yes Yes Adjustable Yes Fixed Adjustable Yes Fixed No No Yes No Yes No Series 72 Series 72 Series 72 M7415 W7212A1009 W7213A1008b W7214A1007b W7215A1006 W7215B1004 W7460A1008 W7460B1006 The H705 includes a SPDT logic module and C7400 sensor (both affixed to the mounting plate). Terminals B-B1 (W7213) for heat pump applications, terminals 0-01 (W7214) for heat pump applications. Sensor Details Model C7150 Sensor of Temperature C7400 C7650 C7232 Enthalpy Dry Bulb Temperature CO2 C7632 CO2 Details Discharge or Mixed Air Changeover Wall Mount Duct Mount Wall Mount Duct Mount Comments Thermistor on board OS Number No Display Display C7150B1004 — — — C7400A1004 C7650A1001 — — Outputs: one relay, one 0/2-10 Vdc analog or 4-20 mA Outputs: one fixed 0-10 Vdc analog (fixed 0-2000 ppm) C7232A1016 C7232B1014 C7232A1008 C7232B1006 C7632A1004 C7632B1002 — — Cross Reference Any Honeywell economizer can be upgraded to use the latest economizer models with the added options of Demand Control Ventilation, exhaust fan set point, purge, air change, 63-8594 Honeywell Economizers 172 outdoor air quality, or system shutdown. See below for cross reference and upgrade options for the economizer modules and sensors. Section 14 - Retrofit and Upgrades Sensors Sensor C7046A1004 C7046A1012 C7046A1020 C7046A1038 C7046A1046 C7150B1004 C7150B1012 C7150B1020 C7150B1038 C7150B1046 C7232A1008 C7232A1016 C7232A1024 C7232A1032 C7232A1057 C7232B1006 C7232B1014 C7232B1022 C7232B1030 C7242A1006 C7242A1014 C7242A1022 C7242A1022 C7242A1030 C7242A1048 C7242B1004 C7242B1012 C7242B1020 C7242C1002 C7242D1000 C7242D1018 C7242E1007 C7400A1004 C7400A1012 C7400A1020 C7400A1038 Comments Standard with 8 in probe OEM Carrier OEM York C7046A1038 has 12 inch probe OEM Rheem with 24 inch leads Standard 3k ohm @ 70°F OEM Carrier 3750 @ 70°F Standard 3750 @ 70°F Standard 10k @ 70°F Wall with display, 1 relay out with Honeywell logo Wall no display, 1 relay out with Honeywell logo Wall with display, 1 relay out, no Honeywell logo Wall no display, 1 relay out, no Honeywell logo Wall with display, 1 relay out, Honeywell logo, 220 Vac, on-off Duct with display, 1 relay and 1 analog out with Honeywell logo Wall no display, 1 relay and 1 analog out Duct with display, 1 relay and 1 analog out, no Honeywell logo Duct no display, 1 relay and 1 analog out, no Honeywell logo Wall with display, 1 relay and 1 analog out Wall with display, 1 relay and 1 analog out Wall no display, 1 relay and 1 analog out Wall no display, 1 relay and 1 analog out Wall with display, 1 relay and 1 analog out Wall no display, 1 relay and 1 analog out Wall no display, 1 relay and 1 analog out Duct with display, 1 relay and 1 analog out Wall no display, 1 relay and 1 analog out Portable with display, 1 analog out Wall with display, Echelon model Duct with display, Echelon model Outdoor no display, 1 analog out Standard OEM York Use with H705 OEM Lennox 173 Can be replaced with C7046A1004 C7046A1004 C7046A1004 C7046A1004 C7150B1004 C7150B1004 C7150B1004 C7232A1016 C7232A1008 C7232A1008 C7232A1016 none C7232B1014 C7232A1008 C7232B1006 C7232B1014 C7232A1016 C7232A1016 C7232A1008 C7232A1008 C7232A1016 C7232A1008 C7232A1008 C7232B1006 C7232A1008 none C7242D1000 none C7400A1004 C7400A1004 C7400A1004 Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades Sensor C7400A1046 C7400A1053 C7632A1004 C7632B1002 C7650A1001 C7650A1027 Comments OEM Carrier OEM Bard Wall no display, with Honeywell logo, 1 analog out Duct no display, with Honeywell logo, 1 analog out Standard OEM Carrier Can be replaced with C7400A1004 C7400A1004 C7650A1001 Economizer Economizer H205A1004 H205A1012 H205A1053 H205A1061 H205A1087 H205A1095 H205A1103 H705A1003 H705A1011 H705A1029 W6210A1003 W6210D1007 W6215A1008 W7210A1001 W7210D1005 W7210D1013 W7212A1009 W7212A1017 W7212A1025 W7212A1033 W7215A1006 W7215A1014 W7215B1002 W7215B1004 W7299A1005 W7299A1013 Comments Standard With mounting plate, adjustment knob, and scale OEM Climate Control OEM Carrier #HH57AC076 OEM Trane #13540687-01 OEM Carrier #HH57AC075 OEM Trol-A-Temp with mounting plate, adjustment knob, and scale Standard OEM York #025-27491 OEM Carrier #HH57AC077 Standard High enthalpy limit model Standard Standard High enthalpy limit model OEM York #10165 Standard OEM Carrier #HH63AW001 OEM York #10208 Do not replace with W7212A1009 OEM Lennox #60M1001 Standard OEM Carrier OEM Trane #X13610221-01 With outdoor IAQ OEM York #65997 W7212A1025 + M7215A1024 + 4074EGR Do not replace with standard model. Standard W7212A1009 + M7215A1008 +4074EGR + 32001401-017 63-8594 Honeywell Economizers 174 Can be replaced with H705A1003 H705A1003 H705A1003 H705A1003 H705A1003 H705A1003 H705A1003 H705A1003 H705A1003 W7212A1009 W7212A1009 W7212A1009 W7212A1009 W7215A1006 M7415B1020 + Q709A1005 Section 14 - Retrofit and Upgrades Economizer W7340A1004 W7340A1012 W7340A1020 W7340B1002 W7340C1000 W7345A1009 W7345B1001 W7399A1004 W7399B1002 W7399C1010 W7415A1004 W7459A1001 W7459A1019 W7459A1027 W7459A1035 W7459A1050 W7459B1009 W7459C1007 W7459D1005 W7460A1008 W7460B1006 W7499A1003 W7499A1011 W7499A1029 W7499A1037 W7499B1001 W859A1000 W859A1034 Comments OEM Trane Standard With wire harness OEM Trane #X1365108202 OEM Trane Standard #X1365108203 OEM Trane OEM Trane Standard W7340A1004 + M7215A1016 Can be replaced with W7340C1000 W7340C1000 W7340C1000 W7340C1000 W7345B1001 W7399C1010 W7399C1010 OEM Standard W7340C1000 + M7215A1016 OEM Trane #X13610221-02 Standard OEM York #3597 Do not replace with W7459A1001 OEM Lennox #54G4301 OEM limits minimum position to 50% open and allows operation with temp activated switch OEM Bard #8602-053 Use with M7405 and W7401 Use with M8405 High enthalpy limit model Standard With outdoor IAQ Standard M7415A1006 + W7459A1001 OEM York M7415A1014 + W7459A1019 Do not replace with standard models. OEM Trane #1361023001 M7415A1006 + W7459A1035 OEM Trane #X12650879-01 M7415A1089 + W7459A1036 OEM Carrier #HF25CA003. M7415B1004 + W7459A1001 Check voltage, original economizer was 120 Vac. If required use 198162EA in Mod IV Motor. 203977A required for Mod IV application only. 203977A required for Mod IV application only. 175 M7415A1063 + Q709A1013 W7459A1001 W7459A1001 W7459A1001 W7212A1009 + Q769C1000 W859F1005 + 203977A W859F1005 + 203977A Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades Economizer W859A1042 W859B1017 W859C1040 W859C1057 W859D1015 W859D1023 W859D1031 W859D1049 W859D1064 W864D1007 W864D1023 W864D1031 W899A1006 W899A1030 Comments Check voltage, original economizer was 120/ 208/240 Vac. If required use 198162EA in Mod IV Motor. 203977A required for Mod IV application only. 203977A required for Mod IV application only. Check voltage, original economizer was 120/ 208/240 Vac. If required use 198162EA in Mod IV Motor. 203977A required for Mod IV application only. Check voltage, original economizer was 120/ 208/240 Vac. If required use 198162EA in Mod IV Motor. 203977A required for Mod IV application only. Check voltage, original economizer was 120/ 208/240 Vac. If required use 198162EA in Mod IV Motor. 203977A required for Mod IV application only. Check voltage, original economizer was 208/ 240 Vac. If required use 198162EA in Mod IV Motor. 203977A required for Mod IV application only. Original economizer had 76 inch averaging element Replacement has 144 inch averaging element. 203977A required for Mod IV applications only. Check voltage, original economizer was 120/ 208/240 Vac. If required use 198162EA in Mod IV Motor. 203977A required for Mod IV application only. 203977A required for Mod IV application only. 203977A required for Mod IV application only. 203977A required for Mod IV application only. Check voltage, original economizer was 208/ 240 Vac. If required use 198162EA in Mod IV Motor. 203977A required for Mod IV application only. M9164D1009 (with stroke set to 160) +198162EA may be substituted for M9164A1013. M9164D1009 (with stroke set to 160) may be substituted for M9164A1013. 63-8594 Honeywell Economizers 176 Can be replaced with W859F1005 + 203977A W859F1005 + 203977A W859F1005 + 203977A W859F1005 + 203977A W859F1013 + 203977A W859F1021 + 203977A W859F1013 + 203977A W859F1021 + 203977A W859F1013 + 203977A W859F1021 + 203977A W859F1021 + 203977A W859F1021 + 203977A W859F1005 + M9164A1013 + 203977A adaptor W859F1005 + M9164A1013 + 203977A adaptor Section 14 - Retrofit and Upgrades Economizer W899A1089 W899E1028 W899E1036 W899E1051 W899E1085 W899G1034 W899G1042 W899G1075 W957B1019 W957C1018 W957D1009 W957E1016 W957F1007 Y514A1090 Y514A1124 Y514A1132 Y514A1173 Comments Can be replaced with W859F1005 + M9164D1009 (with stroke set to 90) + 203977A adaptor M9164D1009 (with stroke set to 160) may be W859F1013 + M9164A1070 + substituted for M9164A1070. 203977A adaptor OEM Singer W859F1021 + M9164A1013 + M9164D1009 (with stroke set to 160) 203977A adaptor +198162EA may be substituted for M9164A1013. M9164D1009 (with stroke set to 160) may be W859F1021 + M9164A1070 substituted for M9164A1070. +198162AA transformer + 203977A adaptor M9164D1009 (with stroke set to 160) may be W859F1021 + M9164A1070 substituted for M9164A1070. +198162AA transformer + 203977A adaptor M9185D1004 (with stroke set to 160) may be W859F1013 + M9185A1018 + substituted for M9185A1018. 203977A adaptor M9185D1004 (with stroke set to 160) may be W859F1021 + M9185A1018 substituted for M9185A1018. +198162AA transformer + 203977A adaptor OEM Singer #050760 W859F1021 + M9185A1018 M9185D1004 (with stroke set to 160) may be +198162AA transformer + 203977A substituted for M9185A1018. adaptor OEM Trane #13610206-01 W859F1021 + M9185A1018 M9185D1004 (with stroke set to 160) may be +198162AA transformer + 203977A substituted for M9185A1018. adaptor M9185D1004 (with stroke set to 160) may be W859F1021 + M9185A1018 + substituted for M9185A1018. 203977A adaptor W859F1021 + M9185D1004 +198162AA transformer + 203977A adaptor W859F1021 + M9185D1004 +198162AA transformer + 203977A adaptor OEM Carrier #HF25CA002A W957G1006 W859F1021 + M9185A1018 +198162AA transformer + 203977A adaptor + H205A1004 + 138823 Knob OEM Trane W859F1021 + M9164A1070 M9185D1004 (with stroke set to 160) may be +198162AA transformer + 203977A substituted for M9185A1070 adaptor + H205A1004 + 7616BR Crank arm + 118349 Scale Plate + M9185D1004 (with stroke set to 160) may be W859F1021 + M9185A1018 + substituted for M9185A1018. 203977A adaptor + H205A1012 + 138823 Knob OEM Trane W859F1021 + M9185D1004 +198162AA transformer + 203977A adaptor + H205A1004 + 7616BR Crank Arm + 118349 Scale Plate + 138823 Knob 177 Honeywell Economizers 63-8594 Section 14 - Retrofit and Upgrades Commercial Thermostats Commercial Thermostats All T7300's with Q7300H Comments Communicating Modulating All T7300's with Q7300A2008 All T7300's with Q7300A and Q3700C All T7300's with non-Q7300H T7300 with Q7300A2016, Q7300A2008, Q7300C2004 and Q7300C2012 Conventional or Heat Pump Conventional or Heat Pump Can be replaced with T7350H1009 T7350H1017 T7350M1008 T7350A1004 T7350B1002 Conventional or Heat Pump Commercial VisionPRO 8000 T7350D1008 TB8220U1003 63-8594 Honeywell Economizers 178 Appendix Appendix Glossary Air Content Sensor—A sensor used to measure certain components of the air in a room or other supply source. It is used as an input to adjust control sequences or parameters. Carbon Dioxide (CO2) is frequently measured as one component of overall air quality to make adjustments to ventilation controllers. Air Quality Standard—A government mandated regulation which specifies the maximum contaminant concentration beyond which health risks are considered to be unacceptable. Automatic Control Loop—A set of devices that react to a change or imbalance in the controlled variable by adjusting other variables to restore the desired balance. Balance Point—The outside air temperature value at which the cooling equipment is turned on. It is used to calculate the savings from an economizer control application. Building-Related Illness—A diagnosable illness with identifiable symptoms whose cause can be directly attributed to airborne pollutants within a building such as Legionnaires disease or hypersensitivity pneumonitis. Controlled Medium—The medium in which the controlled variable exists. In a room temperature control loop, the controlled variable is the space temperature and the controlled medium is the air within the room. Controlled Variable—The quantity or condition that is measured and controlled. Differential Enthalpy—The selection of a supply air source for the mixed air based on the lower enthalpy value derived from two enthalpy sensors located in the outside and return air sources. Most Honeywell electronic enthalpy economizer modules are based on a similar setpoint configuration. The available settings A, B, C and D are for single sensor or high limit enthalpy control. For differential enthalpy the dial is turned to D. Dilution—The reduction of airborne concentration of contaminants through an increase in outdoor air supplied to the area. Discharge or Supply Air—Air which has been treated (heated or cooled) before being supplied to the conditioned area or room. Changeover Control—The control device used to switch over from outside to return air or visa versa to make optimum use of outside air for free cooling. 179 Honeywell Economizers 63-8594 Appendix Economizer—Economizer controls provide “free cooling” during the cooling season by measuring the temperature or enthalpy of outside air. Outside air is used for cooling if it is sufficiently cool and dry. This reduces the usage of the mechanical cooling equipment and reduces cooling costs. Electric Control—A control circuit that operates on line or low voltage and uses a mechanical device, such as a temperature-sensitive bellows, to perform control functions, such as actuating a switch or positioning a potentiometer. The controller signal typically operates or positions an electric actuator or may switch an electrical load directly or through a relay. Electronic Control—A control circuit that operates on low voltage and uses solidstate components to amplify input signals and perform control functions, such as operating a relay or providing an output signal to position an actuator. The controller typically furnishes fixed control algorithms based on the circuitry inside the solid-state components. Electromechanical Controller—A control device such as the H205 which is constructed of moving parts instead of solid state or electronic components. Typically more calibration and replacement is required of these devices than solid state controllers. Enthalpy—A measure of the total energy content of air based upon both temperature and moisture content. When selecting air for cooling it is a better measurement than solely temperature. Final Control Element—A device such as a valve or damper that is used to change the value of the manipulated variable. Positioned by an actuator. Indoor Air Quality (IAQ)—The characteristics of the indoor climate of a building, including the gaseous composition, temperature, relative humidity, and airborne contaminants. Integrated Economizer—An economizer control circuit that replaces the inefficient “wild” economizer by only enabling outside air for cooling when there is a call for cooling from the commercial thermostat. Manipulated Variable—The quantity or condition regulated by the automatic control equipment to cause the desired change in the controlled variable. Mixed Air—The combination of outdoor and return air prior to mechanical cooling or heating. Modulation—A control mode with minute increments and decrements. Proportional Band—In a modulating controller, the control point range through which the controller output varies through a predefined range (3 to 15 PSI - 21 to 103 kPa, 2 to 10 volts, 1 to 100%). Sometimes expressed in percent of primary sensor span. Commonly used equivalents are “throttling range” and “modulating range”, usually expressed in degrees of temperature. Sensing Element—A device or component that measures the value of a variable such as temperature or humidity. Setpoint—The value at which the controller is set such as the desired room temperature on a commercial thermostat. 63-8594 Honeywell Economizers 180 Appendix Throttling Range—In a modulation controller, the control point range through which the controlled variable must pass to move the final control element through its full operating range. Expressed in values of the controlled variable such as degrees, percent relative humidity, or pressure in pounds per square inch or kPa. Also referred to as “proportional band”. For a modulating commercial thermostat, the temperature change required to drive the manipulated variable from full off to full on. Total Heat—Same as enthalpy. Two-Position—A basic on-off control circuit in which the device being controlled is either full on or full off with no intermediate operating positions available. Also referred to as “on-off” control. 181 Volatile Organic Compound (VOC)—One of a class of chemical components that contain one or more carbon atoms and are volatile at room temperature and normal atmospheric pressure. In indoor air, VOCs are generated by such sources as tobacco smoke, building products, furnishings, cleaning materials, solvents, polishes, cosmetics, deodorizers and office supplies. 'Wild Economizer'—A mixed air control circuit in which outside air is used virtually on a continuous basis whether or not there is a call for cooling from the controlled area. This can be very inefficient in some applications and raise heating costs. Zoning—The practice of dividing a building into sections for heating and cooling control so that one controller is sufficient to control the heating and cooling requirements for the section. Honeywell Economizers 63-8594 Appendix Accessories for the M74XX Series Actuators 4074EHB Screw Terminal Adapter—converts quickconnect terminals to screw terminals. Adapter can be used with or without 7640QF M11523 4074 EHB 7640QF Terminal Enclosure—provides wiring enclosure for electrical terminal connections. Enclosure can be used with or without 4074EHB Screw Terminal Adapter. Bag assembly includes: terminal housing, cover plate M11519A 7640QF Q709A Actuator Mounted Minimum Position Potentiometer—permits adjustment of minimum damper position and provides quick-connect terminals for remote minimum position potentiometer P MIN P POS 1 N INCR Q709 63-8594 Honeywell Economizers 182 M11535 Appendix ECONOM IZER LOW LIMIT S963B1136 Minimum Position Potentiometer— permits remote adjustment of minimum damper position; can be used with or without Q709A Actuator Mounted Minimum Position HEAT/CO OL M11548A S963 C7150B1004 Mixed or Discharge Air Thermistor Sensor— use with M7415A proportioning M11533 C7150B C7046 Discharge Air Sensor—use in place of C7150B1004 if desired. C7046C 183 M11518 Honeywell Economizers 63-8594 Appendix 4074EGR Crank Arm Assembly M3856A Q298B Linkage Hardware—enables linking the actuator to an additional damper. Consists of two crank arm assemblies, two ball joint assemblies, and variable length push rods (in 10, 16, or 24 inch lengths) M11546 Q298 Q769A 6 to 9 volt Adapter for M7415A actuator—enables the actuator to be proportionately modulated with a 6 to 9 Vdc signal. The Q769A may also be used in lieu of a Q709A to control the minimum position of an M7415A with a 6 to 9 Vdc signal when a C7150B is used as a temperature sensor. Q769B 4 to 20 mA Adapter for M7415A actuator—enables the actuator to be proportionately modulated with a 4 to 20 mA signal. The Q769B may also be used in lieu of a Q709A to control the minimum position of an M7415A with a 4 to 20 mA signal when a C7150B is used as a temperature sensor MIN P1 POS N P 6V to 9V M3853A PUSH Q769 ONTO M7415 ACTUATOR 4074EKV Auxiliary Switch—provides switching capability for controlling auxiliary equipment. The switch acts as a function of the actuator shaft position M3852A Adapters and potentiometers are available to be installed directly on actuator or on W7459 controller. 63-8594 Honeywell Economizers 184 Appendix 185 Honeywell Economizers 63-8594 Technical Reference Manual Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée. 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422-3992 Toronto, Ontario M1V 4Z9 Design and Application Guide for Honeywell Economizer Controls customer.honeywell.com ® U.S. Registered Trademark © 2007 Honeywell International Inc. 63-8594 Rev. 08-07 BLD509-10 Econ Guide Cover.indd 1 Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. 7/16/07 3:47:13 PM