Download Carrier AQUAZONE 50PEC09-18 Product data
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Product Data Aquazone™ 50PEC09-18 Water Source Heat Pumps Console Unit with Puron® Refrigerant (R-410A) 3/ 4 to 11/2 Nominal Tons TM Single-package console water source heat pump with self-contained line voltage thermostats. • Suitable for either geothermal or boiler/tower applications with operating temperature range from 25 F to 110 F • Flexible and reliable multiple protocol WSHP Open controller can use BACnet*, Modbus†, N2, and LonWorks** protocols for integrating energy efficiency and precise unit control • Thermostatic expansion valve (TXV) • Rubber grommet mounted compressors for quiet operation • Sloped top cabinet • Right or left hand piping connection • Multiple unit-mounted and remote thermostat options • Adaptable cabinet and subbase configurations • Non-ozone depleting Puron refrigerant (R-410A) Features/Benefits Carrier’s Aquazone console water source heat pumps are a flexible, attractive alternative for all finished interior space, under-window style installations. Operating efficiency Aquazone water source heat pump (WSHP) units are designed for quality and performance excellence over their lifetime. Units offer standard cooling EERs (energy efficiency ratios) up to 13.3 for boiler/tower systems and as high as 22.3 for geothermal applications. Heating COPs (coefficients of performance) are as high as 4.6, among the highest in the industry. © Carrier Corporation 2015 Form 50PEC-10PD Features/Benefits (cont) Quiet operation The Carrier console WSHP provides exceptionally quiet operation for maximum comfort. Design flexibility Aquazone™ console WSHP units are offered in 4 capacity sizes to meet individual zone needs efficiently and effectively. Extended operating range units are standard to suit a variety of application requirements. Safe, reliable operation Standard safety features include: high and low pressure monitoring and field selectable water and air coil freeze protection sensing. All safety controls may be reset at the thermostat. Each unit is tested and run at the factory to ensure proper operation of all components and safety switches. All components are carefully designed and selected for endurance, durability, and carefree day-to-day operation. The water-to-refrigerant heat exchanger has copper inner and steel outer tubing which is painted on the outside to provide corrosion resistance protection. Cupronickel heat exchangers are available and should be used on all open loop applications. Units are rated and certified in accordance with AHRI (Air-Conditioning, Heating, and Refrigeration Institute)/ ISO (International Organization for Standardization)/ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) 13256-1 performance standard, and are CSA (Canadian Standards Association)/ NRTL (Nationally Recognized Testing Lab) listed. Installation ease The unit is packaged for simple, low cost handling, with minimal time required for installation. The console unit arrives at the jobsite fully assembled to minimize installation time and reduce installation cost. All units are pre-wired and factory charged with Puron® refrigerant (R-410A). Water connections are available in a variety of configurations direct from the factory. The standard configuration is 5/8 in. OD sweat connections for maximum flexibility in the field. The standard electrical connections are made quickly and directly to a power distribution terminal block. To further improve installation efficiency, a fused or unfused disconnect switch, as well as a 20 amp plug and cord, are available as factory-installed options. A 3/4 in. ID vinyl condensate connection is provided for connection to the field-installed condensate line. Compact cabinet design dimensions are 12 in. deep, 48 in. wide and 24 in. tall. For flexibility, the controls can be mounted on the top right or left side. Additionally, the sloped top design discourages the use of the unit as a shelf, preventing air blockage and any spills from damaging the unit. No-fuss maintenance and serviceability Large service access panels enable quick inspection for problem solving and the control box swings down for easy access to the controls. Table of contents Page Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 AHRI/ISO Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-11 Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-20 Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-25 Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-28 2 Fan motor sleeve bearings are permanently lubricated. If the unit requires service, an easily removable cabinet and slide-out fan section make access simple. Units are equipped with easily accessible service access ports on both the suction and the discharge refrigerant lines for on-site testing and refrigerant recovery. Filter racks provide easy filter access for cleaning. Maximum control flexibility Aquazone water source heat pumps provide reliable control operation using a standard microprocessor board with flexible alternatives for many direct digital controls (DDC) applications including open protocol systems. Carrier’s Aquazone unit solid-state control system, the Complete C, provides control of the unit compressor, reversing valve, fan, safety features, and troubleshooting fault indication features. The Complete C control system is a user friendly, low cost, advanced WSHP control board. Many features are field selectable to maximize flexibility in field installation. The overall features of this control system include: 40-va transformer — Assists in accommodating accessory loads. Anti-short cycle timer — The timer provides a minimum off time to prevent the unit from short cycling. The 5-minute timer energizes when the compressor is de-energized, resulting in a 5-minute delay before the unit can be restarted. Thus, it prevents short cycling of the compressor. Random start relay — The random start relay provides a random delay in energizing each different WSHP unit. This option minimizes peak electrical demand during start-up from different operating modes or after building power outages. The control features a 5 to 80 second random start upon start-up. High and low pressure refrigerant protection — Safeguards against unreliable unit operation and prevents refrigerant from leaking. Condensate overflow sensor — Electronic sensor mounted to the drain pan. When condensate pan liquid reaches an unacceptable level, the unit is automatically deactivated and placed in a lockout condition. The sensor recognizes 30 continuous seconds of overflow as a fault condition. High and low voltage protection — Safety protection for excessive or low voltage conditions. Automatic intelligent reset — Unit shall automatically restart 5 minutes after shutdown if the fault has cleared. Should a fault occur 3 times sequentially, lockout will occur. Accessory output — In applications such as variable speed pumping, a 24-v output cycles a motorized water valve or damper actuator with compressor. Performance monitor (PM) — This feature monitors water temperatures to warn when the heat pump is operating inefficiently or beyond typical operating range. A field selectable switch initiates a warning code on the unit display. Water coil freeze protection (selectable for water or antifreeze) — Field selectable switch for water and water/glycol solution systems initiates a fault when temperatures exceed the selected limit for 30 continuous seconds. Air coil freeze protection (check filter operation) — Field selectable switch for assessing excessive filter pressure drop initiates a fault when temperatures exceed the selected limit for 30 continuous seconds. Alarm relay setting — Selectable 24-v or pilot duty dry contact provides remote alarm activation. Service Test mode with diagnostic LED (light-emitting diode) — Test mode allows service personnel to check the operation of the WSHP and control system efficiently. Upon entering Test mode, time delays speed up, and the Status LED flashes a code indicating the last fault. This mode provides an easy fault diagnosis, based on the fault code that the status LED flashes. Carrier-provided troubleshooting tables provide an easy reference to typical problems. LED visual output — An LED panel indicates high pressure, low pressure, low voltage, high voltage, air/water freeze protection, condensate overflow, and control status. Puron® refrigerant (R-410A) Puron refrigerant (R-410A) is a nonchlorine based enviromentally balanced, non-ozone depleting refrigerant. Puron refrigerant characteristics, compared to R-22, have: • Binary and near azeotropic mixture of 50% R-32 and 50% R-125. • Higher efficiencies (50 to 60% higher operating pressures). • Virtually no glide. Unlike other alternative refrigerants, the two components in Puron refrigerant have virtually the same leak rates. * Sponsored by ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers. † Registered trademark of Schneider Electric. ** Registered trademark of Echelon Corporation. 3 Model number nomenclature 50PEC 12 X A U E 3 A 1 A 1 Factory Installed Options 50PEC – Aquazone™ High Efficiency Water Source Heat Pump Console Unit with Puron® Refrigerant (R-410A) 09 12 15 18 – 3/4 – 1 – 11/4 – 11/2 Water Circuit Options A – 5/8 in. Sweat, Right H – 1/2 in. FPT Fitting, Right T – 1/2 in. FPT Fitting, Left X – 5/8 in. Sweat, Left Cabinet and Subbase Options A – Standard 63 in. Cabinet and Subbase T – No Cabinet and Standard Subbase X – Standard 48 in. Cabinet and Subbase W – No Cabinet and No Subbase L – R – U – W– Standard C Microprocessor Control Package with Remote Thermostat Deluxe D Microprocessor Control Package with Remote Thermostat Unit Mounted Controller WSHP Open with C Microprocessor Control LEGEND Cu — Copper CuNi — Cupronickel OA — Outdoor Air 4 Option Standard Cleanable Mesh Filter Std (No OA Damper) OA Damper 1 A Operating Range/Sound Option A – Extended Range Packaging 1 – Domestic A Voltage 0 – 115-1-60 3 – 208/230-1-60 4 – 265-1-60 B – 115-1-60 with Disconnect C – 208/230-1-60 with Disconnect D – 265-1-60 with Disconnect Refrigerant Circuit Options E – Cu, Coated Evap J – CuNi, Coated Evap AHRI/ISO capacity ratings 50PEC UNIT SIZE FLUID FLOW RATE gpm 09 12 15 18 COP db EER wb — — — — 2.0 2.5 4.0 5.0 WATER LOOP HEAT PUMP Cooling 86 F Capacity Btuh 8,200 10,500 14,400 16,400 EER 12.9 12.0 13.3 12.3 GROUND WATER HEAT PUMP Heating 68 F Capacity Btuh 9,400 12,400 15,000 17,500 COP 4.6 4.3 4.3 4.2 Cooling 59 F Capacity Btuh 10,200 13,000 16,400 18,300 LEGEND Coefficient of Performance Dry Bulb Temperature Energy Efficiency Ratio Wet Bulb Temperature EER 22.3 19.4 19.8 17.6 Heating 50 F Capacity Btuh 7,400 10,900 11,800 14,600 COP 3.8 3.8 3.6 3.4 GROUND LOOP HEAT PUMP Cooling 77 F Capacity Btuh 9,000 11,500 14,700 17,000 EER 16.0 14.2 14.5 14.0 Heating 32 F Capacity Btuh 5,400 8,400 9,800 12,000 COP 3.3 3.3 3.3 3.1 NOTES: 1. Ratings are in accordance with and certified to AHRI/ISO Standard 13256-1. 2. Cooling capacities based upon 80.6 F db, 66.2 F wb entering air temperature. 3. Heating capacities based upon 68 F db, 59 F wb entering air temperature. Physical data BASE UNIT 50PEC COMPRESSOR (1 each) Maximum Water Working Pressure (psig/kPa) 09 Rotary 12 Rotary 15 Rotary 18 Rotary 400/3100 400/3100 400/3100 400/3100 PSC/2 PSC/2 PSC/2 PSC/2 1/10 1/10 1/4 PSC Fan Motor and Blower Fan Motor Type/Speeds Fan Motor (hp) Blower Wheel Size (Dia x W) (in.) (qty) 5.5 x 8.0 (X 2) WATER CONNECTION SIZE (in.) 0.15 Coaxial Coil Volume (gal.) Condensate Connection in. FPT 5.5 x 8.0 (X 2) 5.5 x 8.0 (X 2) 5/8 in. Sweat (Optional 1/2 in. FPT) 3/ 4 ID (1 OD) 0.15 3/ 4 ID (1 OD) 1/4 5.5 x 8.0 (X 2) 0.31 3/ 4 ID (1 OD) 0.31 3/ 4 ID (1 OD) VERTICAL CABINET Refrigeration Charge (oz) Air Coil Dimensions (H x L) (in.) 19 22 23 23 10 x 27 10 x 27 10 x 27 10 x 27 7 x 311/4 x 3/8 7 x 311/4 x 3/8 7 x 311/4 x 3/8 7 x 311/4 x 3/8 Weight - Operating (lb) 131 138 144 144 Weight - Shipping (lb) 151 158 164 164 Std. Filter - Washable Aluminum (H x L x W) (in.) LEGEND FPT — Female Pipe Thread PSC — Permanent Split Capacitor 5 Options and accessories ITEM Unit Mounted Controller Cupronickel Heat Exchangers Thermostat Options Piping Connections Deluxe D Microprocessor Control Board WSHP Open Multi-Protocol Controller WSHP Open Equipment Touch™ Device WSHP Open System Touch™ Device WSHP Open ZS Sensor Supply and Return Water Hose Kits Edge Pro® 7-Day Programmable Thermostat FACTORYINSTALLED OPTION X X X X FIELDINSTALLED ACCESSORY UNIT MOUNTED CONTROL X X X X X X X Factory-installed options Unit mounted controller is a factory-wired option. The standard unit mounted controller provides a tactile touchpad for temperature, fan and mode adjustment as shown. Temperature is read in a digital display, with an LED display indicating unit operating mode, as well as fan speed and fault indication for high or low pressure lockout. Temperature set points are adjustable from 60 F to 80 F, with an adjustable temperature differential between 1° F and 6° F. Selectable options include manual or automatic changeover, high or low fan speed as well as constant fan operation or fan operation to cycle with the compressor. Additional features include a 5-minute anti short cycling delay, random start, 90-second low pressure bypass timer and intelligent reset to allow the unit to automatically restart after 5 minutes if a fault is no longer active. Cupronickel heat exchangers are available for higher corrosion protection for applications such as open tower, geothermal, etc. Consult the water quality guidelines for proper application and selection of this option. Thermostat options include auto changeover (ACO) thermostat. The thermostat sends the appropriate signal to the controller for cooling or heating mode of operation. Options R and L allow connection to a remote wallmounted thermostat. The controller requires a heat pump thermostat. The controller can be configured for heat pump or heat/cool thermostat. Piping connections can be provided on either the right or left hand side of the unit, for easy installation. Orientation is determined by facing the unit from the front side. Deluxe D microprocessor control board provides all of the options on the standard Complete C control board in addition to the following: • Phase Monitor - Prevent motors from running at temperatures above approved ratings, and provides protection against phase loss, phase reversal, and phase unbalance. • Energy Management Switch - Enables a 24 vac external signal to control the operation of the WSHP. • Pump-Valve Relay - provides a signal between an isolation valve and a secondary pump. COMPLETE C AND DELUXE D BOARD CAPABILITIES CAPABILITY 6 COMPLETE C BOARD DELUXE D BOARD High and Low Refrigerant Pressure Switches X X Fluid Temperature (Freeze) Protection X X Condensate Overflow Protection Sensor X X Air Temperature (Freeze) Protection X X Anti-short Cycle Timer X X Random Start Relay X X Low Pressure Bypass Timer X X Surge Protection X X Intelligent Reset X X Lockout Reset X X Malfunction (Alarm) Output X X Test Service Mode with LED Fault Indication X X WSHP Open Compatibility X X Energy Management Switch X Pump-Valve Relay X WSHP Open multi-protocol controller is an integrated component of a Carrier water source heat pump. The WSHP Open controller continuously monitors and regulates water source heat pump operation with reliability and precision. This advanced controller features a sophisticated, factory-engineered control program that provides optimum performance and energy efficiency. The WSHP Open controller is factory installed and programmed to control all factory-installed standard options. The WSHP Open controller is programmed to communicate with different protocols including BACnet, N2, Modus and LonWorks. While the controller is programmed to operate on Carrier's i-Vu® building automation system (BAS), the WSHP Open controller can easily be integrated into a third party BAS. Independent fan speed control provides the most efficient WSHP operation. All WSHP Open controllers come programmed from the factory with independent fan speed control. Using the space temperature input, the WSHP Open controller will automatically operate the fan at the lowest of the available fan speeds to maintain space temperature while providing increased latent heat removal, reduced sound and the lowest fan energy consumption. Intuitive fault detection allows prolonged operation of the WSHP. The pre-programmed WSHP Open controller logic monitors and pre-emptively shuts down a WSHP as an alarming condition approaches instead of causing a hard lock out of the WSHP. This way, the WSHP can automatically restart if the fault condition clears within a set amount of time and a local reset of the WSHP is not required. Learning Adaptive Optimal Start transitions the WSHP from unoccupied set points to occupied set points in the most efficient means possible. Over time, the WSHP will learn and determine the best adjustment rates of the set points to provide the most efficient means of shifting the WSHP to an occupied mode. Field-installed accessories WSHP Open Equipment Touch™ and System Touch™ touchscreen devices have a color LCD display that allows easy connection to the controllers to view or change the controller's property values including set points, schedule equipment, view trends and alarms and more. The Equipment Touch device provides easy connection to one controller while the System Touch device can access up to 60 controllers when wired together as a network. For more details about the Equipment Touch and System Touch devices, see either the Equipment Touch or System Touch Installation and Setup Guide. WSHP Open - ZS sensors are the preferred method of monitoring space temperature, humidity and CO2 levels when using the WSHP Open controller. NOTE: The ZS sensor is required for space temperature with all WSHP Open controllers. Only a ZS sensor can provide the necessary space temperature input for the WSHP Open controller. Supply and return water hose kits are available as accessories. Hose kits are recommended for connection between the unit and the water loop piping. Hose kits are 24 inches in length, flexible stainless steel and have options for manual isolation valves with and without auto flow regulators and Y-strainers. Edge® Pro 7-day programmable thermostat is available for connecting a unit directly to a wall mounted thermostat. The Edge Pro thermostat offers 2-stage heat, 2-stage cool, remote sensor capability, pre-occupancy purge, soft start, manual/auto changeover, 4 settings per day, 24 vac, backlit LCD, keypad lockout, no batteries required, 5-minute compressor protection, never lost memory, 3 security levels, and temperature display in degrees F or C. EDGE PRO® THERMOSTAT 7 Options and accessories (cont) ZS SENSOR FEATURES F F i i FEATURES ZS STANDARD ZS PLUS ZS PRO Temp, CO2, Humidity Neutral Color X X X X ZS PRO-F X X X X Addressable/Supports Daisy-Chaining X X X X Hidden Communication Port X X X X Mounts on a Standard 2-in. X 4-in. Electrical Box X X X X Occupancy Status Indicator X X X Push-Button Occupancy Override X X X Set Point Adjust X X X Large, Easy-to-Read LCD X X Alarm Indicator X X Fan Speed Control X Cooling/Heating/Fan Only - Mode Control X F to C Conversion Button X ZS SENSOR OPTIONS ZS STANDARD OPTIONS Temperature Only Temperature with CO2 Temperature with Humidity Temperature with Humidity and CO2 8 ZS-CAR ZS-C-CAR ZS PLUS ZS PRO PART NUMBER ZSPL-CAR ZSP-CAR ZSPL-C-CAR ZSP-C-CAR ZS PRO-F ZSPF-CAR ZSPF-C-CAR ZS-H-CAR ZSPL-H-CAR ZSP-H-CAR ZSPF-H-CAR ZS-HC-CAR ZSPL-HC-CAR ZSP-HC-CAR ZSPF-HC-CAR 415 Dimensions 50PEC09-18 UNIT CONSOLE (48 in. Cabinet Option) 2.875 LEFT HAND WATER CONNECTIONS RIGHT HAND WATER CONNECTIONS 6.00 45.00 45.00 6.00 6.125 23.875 12.875 30.75 3.375 48.00 15.875 48.00 30.75 11.00 12.00 NOTES: 1. All dimensions within ± 0.125 inches. 2. Specifications subject to change without notice. 50PEC09-18 UNIT CONSOLE (63 in. Cabinet Option) Left Hand Water Connections Right Hand Water Connections NOTES: 1. All dimensions are in inches. All dimensions are within ± 0.125 inch. 2. Specifications subject to change without notice. 3. Fresh air opening in subbase rear. 4. When installing units in cold climates, an outside air damper must be provided to prevent possible condenser freeze-up. 9 Dimensions (cont) 50PEC09-18 UNIT CHASSIS (48 in. Cabinet Option) LEFT HAND WATER 42.75 11.00 8.00 1.38 12.00 0.75 Water Out 1.00 2.75 2.00 Water In 19.56 Condensate Water 15.63 13.75 13.50 5.00 1.75 3.38 1.63 RIGHT HAND WATER Disconnect Switch 0.75 42.75 11.00 4.88 8.00 2.75 Disconnect Switch 0.75 2.00 Water In 15.63 1.00 Water Out 15.00 13.75 8.69 Condensate Water 4.00 7.31 NOTES: 1. All dimensions are within ± 0.125 inch. 2. Console units must be installed with a cabinet and subbase. 3. Unit controller shown, other control options may have a different control panel configuration. 4. Specifications subject to change without notice. 10 50PEC09-18 UNIT CHASSIS (63 in. Cabinet Option) Water Out 2.00 1.00 Water In 12.00 Left Hand Water Connections Condensate Water 13.75 13.50 5 1.75 1.63 2.00 Water In 1.00 Water Out 15.00 Right Hand Water Connections 13.75 8.69 4.00 Condensate Water 7.31 NOTES: 1. All dimensions are in inches. All dimensions are within ± 0.125 inch. 2. Specifications subject to change without notice. 3. Fresh air opening in subbase rear. 4. When installing units in cold climates, an outside air damper must be provided to prevent possible condenser freeze-up. WIDTH DEPTH HEIGHT 63.00 12.00 23.88 CONTROL DISC. DOOR GRILLE WIDTH WIDTH 6.00 45.00 GRILLE EDGE CLEARANCE SUBTO TO UNIT BASE DOOR BOTTOM DEPTH LEFT HAND 6.12 3.37 11.00 GRILLE CABINET EDGE END TO RETURN TO RETURN AIR WIDTH DOOR, AIR LEFT RIGHT HAND HAND 30.87 30.75 2.87 CABINET END TO RETURN AIR, RIGHT HAND 12.87 CONDENSER CONDENSER RECOMMENEDED REPLACEMENT HEIGHT FROM WATER SUBBASE, CONNECTIONS NOMINAL FILTER SIZE LEFT HAND FPT 5.00 5/8 30.12 x 7 x 0.37 11 Performance data 50PEC09 — COOLING, NOMINAL AIRFLOW 350 CFM, 2.0 GPM ENTERING AIR TEMP (F) EWT (F) TOTAL CAPACITY (MBtuh) 50 60 70 85 100 50 60 70 85 100 50 60 70 85 100 50 60 70 85 100 70 db 61 wb 75 db 63 wb 80 db 67 wb 85 db 71 wb 9.35 8.72 8.10 7.16 6.22 10.01 9.34 8.67 7.66 6.65 10.97 10.24 9.50 8.40 7.29 11.94 11.14 10.34 9.14 7.93 SENSIBLE CAPACITY (MBtuh) SENSIBLE TO TOTAL RATIO 6.22 5.86 5.50 4.99 4.49 7.42 6.98 6.56 5.95 5.34 8.17 7.69 7.22 6.55 5.89 8.94 8.41 7.90 7.17 6.44 0.67 0.67 0.68 0.70 0.72 0.74 0.75 0.76 0.78 0.80 0.74 0.75 0.76 0.78 0.81 0.75 0.75 0.76 0.78 0.81 POWER INPUT (kW) HEAT OF REJECTION (MBtuh) EER 0.38 10.66 24.4 0.45 10.25 19.5 0.51 0.60 0.70 0.39 0.45 0.51 0.61 0.70 0.39 0.45 0.52 0.61 0.71 0.39 0.46 0.52 0.62 0.72 9.84 9.22 8.60 11.33 10.87 10.42 9.74 9.05 12.30 11.78 11.27 10.49 9.71 13.27 12.69 12.11 11.25 10.38 15.9 11.8 8.9 26.0 20.8 16.9 12.6 9.5 28.2 22.6 18.4 13.7 10.3 30.5 24.4 19.8 14.8 11.1 50PEC09 — HEATING, NOMINAL AIRFLOW 350 CFM, 2.0 GPM ENTERING AIR TEMP (F) 60 70 80 EWT (F) TOTAL CAPACITY (MBtuh) 50 60 70 80 50 60 70 80 50 60 70 80 7.74 8.90 10.06 11.22 7.31 8.41 9.50 10.60 6.81 7.83 8.85 9.87 POWER INPUT (kW) HEAT OF ABSORPTION (MBtuh) COP 0.53 5.92 4.3 0.57 6.96 4.6 0.60 0.64 0.54 0.58 0.61 0.65 0.56 0.59 0.63 0.67 8.00 9.04 5.46 6.43 7.41 8.38 4.91 5.81 6.71 7.60 4.9 5.2 3.9 4.3 4.5 4.8 3.6 3.9 4.1 4.3 50PEC09 — LOW TEMPERATURE HEATING*, NOMINAL AIRFLOW 350 CFM, 2.0 GPM ENTERING AIR TEMP (F) 60 70 80 COP db EER EWT MBtuh wb — — — — — — TOTAL CAPACITY (MBtuh) 25 30 40 25 30 40 25 30 40 4.74 5.31 6.45 4.48 5.01 6.09 4.17 4.67 5.67 LEGEND Coefficient of Performance Dry Bulb Temperature Energy Efficiency Ratio Entering Water Temperature Btuh in Thousands Wet Bulb Temperature * Antifreeze required. 12 EWT (F) POWER INPUT (kW) HEAT OF ABSORPTION (MBtuh) COP 0.44 3.22 3.1 0.46 3.73 3.4 0.50 0.45 0.47 0.51 0.46 0.48 0.52 4.75 2.93 3.41 4.36 2.59 3.02 3.90 3.8 2.9 3.1 3.5 2.6 2.8 3.2 50PEC12 — COOLING, NOMINAL AIRFLOW 450 CFM, 2.5 GPM ENTERING AIR TEMP (F) EWT (F) TOTAL CAPACITY (MBtuh) 50 11.90 11.12 10.33 9.16 7.98 12.74 11.90 11.06 9.80 8.54 13.97 13.05 12.13 10.75 9.37 15.19 14.19 13.19 11.69 10.19 60 70 70 db 61 wb 85 100 50 60 70 75 db 63 wb 85 100 50 60 70 80 db 67 wb 85 100 50 60 70 85 db 71 wb 85 100 SENSIBLE CAPACITY (MBtuh) SENSIBLE TO TOTAL RATIO 7.92 7.46 7.02 6.39 5.76 9.44 8.89 8.37 7.61 6.86 10.40 9.80 9.22 8.39 7.56 11.37 10.71 10.08 9.17 8.27 0.67 0.67 0.68 0.70 0.72 0.74 0.75 0.76 0.78 0.80 0.74 0.75 0.76 0.78 0.81 0.75 0.75 0.76 0.78 0.81 POWER INPUT (kW) HEAT OF REJECTION (MBtuh) EER 0.58 13.88 20.5 0.65 13.35 17.0 0.73 0.84 0.95 0.58 0.66 0.73 0.84 0.96 0.59 0.66 0.74 0.85 0.96 0.59 0.67 0.74 0.86 0.97 12.82 12.02 11.23 14.73 14.15 13.56 12.69 11.81 15.98 15.31 14.65 13.65 12.66 17.22 16.48 15.73 14.62 13.51 14.2 10.9 8.4 21.8 18.1 15.1 11.6 8.9 23.7 19.7 16.4 12.6 9.7 25.6 21.2 17.7 13.6 10.5 50PEC12 — HEATING, NOMINAL AIRFLOW 450 CFM, 2.5 GPM ENTERING AIR TEMP (F) EWT (F) TOTAL CAPACITY (MBtuh) 50 11.05 12.21 13.37 14.53 10.44 11.53 12.63 13.73 9.72 10.74 11.76 12.79 60 70 60 80 50 60 70 70 80 50 60 70 80 80 POWER INPUT (kW) HEAT OF ABSORPTION (MBtuh) COP 0.78 8.38 4.1 0.81 9.43 4.4 0.84 0.87 0.80 0.83 0.86 0.89 0.82 0.85 0.88 0.91 10.49 11.54 7.72 8.71 9.70 10.68 6.94 7.85 8.76 9.67 4.6 4.9 3.8 4.1 4.3 4.5 3.5 3.7 3.9 4.1 50PEC12 — LOW TEMPERATURE HEATING*, NOMINAL AIRFLOW 450 CFM, 2.5 GPM ENTERING AIR TEMP (F) 60 EWT (F) TOTAL CAPACITY (MBtuh) 25 7.98 8.55 9.69 7.54 8.08 9.16 7.02 7.52 8.53 30 40 25 70 30 40 25 80 COP db EER EWT MBtuh wb — — — — — — 30 40 POWER INPUT (kW) HEAT OF ABSORPTION (MBtuh) COP 0.70 5.58 3.3 0.72 6.10 3.5 0.75 0.72 0.73 0.77 0.73 0.75 0.78 7.13 5.09 5.58 6.54 4.52 4.96 5.85 3.8 3.1 3.2 3.5 2.8 2.9 3.2 LEGEND Coefficient of Performance Dry Bulb Temperature Energy Efficiency Ratio Entering Water Temperature Btuh in Thousands Wet Bulb Temperature * Antifreeze required. 13 Performance data (cont) 50PEC15 — COOLING, NOMINAL AIRFLOW 550 CFM, 4.0 GPM ENTERING AIR TEMP (F) EWT (F) TOTAL CAPACITY (MBtuh) 50 14.79 14.08 13.37 12.31 11.24 15.83 15.07 14.31 13.17 12.03 17.35 16.52 15.69 14.44 13.19 18.88 17.97 17.07 15.71 14.35 60 70 70 db 61 wb 85 100 50 60 70 75 db 63 wb 85 100 50 60 70 80 db 67 wb 85 100 50 60 70 85 db 71 wb 85 100 SENSIBLE CAPACITY (MBtuh) 9.84 9.45 9.09 8.58 8.11 11.73 11.26 10.82 10.22 9.66 12.92 12.41 11.93 11.27 10.65 14.13 13.57 13.04 12.32 11.65 SENSIBLE TO TOTAL RATIO 0.67 0.67 0.68 0.70 0.72 0.74 0.75 0.76 0.78 0.80 0.74 0.75 0.76 0.78 0.81 0.75 0.75 0.76 0.78 0.81 POWER INPUT (kW) HEAT OF REJECTION (MBtuh) EER 0.72 17.26 20.5 0.81 16.86 17.3 0.90 1.04 1.18 0.73 0.82 0.91 1.05 1.18 0.73 0.83 0.92 1.06 1.19 0.74 0.83 0.92 1.06 1.20 16.46 15.86 15.26 18.30 17.86 17.42 16.74 16.07 19.86 19.34 18.82 18.04 17.27 21.40 20.81 20.22 19.34 18.46 14.8 11.8 9.6 21.8 18.4 15.7 12.6 10.2 23.7 20.0 17.1 13.7 11.1 25.5 21.6 18.5 14.8 11.9 50PEC15 — HEATING, NOMINAL AIRFLOW 550 CFM, 4.0 GPM ENTERING AIR TEMP (F) EWT (F) TOTAL CAPACITY (MBtuh) 50 12.75 14.26 15.77 17.28 12.05 13.48 14.90 16.33 11.22 12.55 13.88 15.21 60 70 60 80 50 60 70 70 80 50 60 70 80 80 POWER INPUT (kW) HEAT OF ABSORPTION (MBtuh) COP 0.92 9.61 4.1 0.96 10.98 4.3 1.00 1.04 0.94 0.98 1.02 1.06 0.96 1.00 1.04 1.09 12.36 13.73 8.84 10.13 11.42 12.71 7.94 9.13 10.31 11.50 4.6 4.9 3.8 4.0 4.3 4.5 3.4 3.7 3.9 4.1 50PEC15 — LOW TEMPERATURE HEATING*, NOMINAL AIRFLOW 550 CFM, 4.0 GPM ENTERING AIR TEMP (F) 60 EWT (F) TOTAL CAPACITY (MBtuh) 25 8.80 9.54 11.02 8.32 9.02 10.41 7.75 8.40 9.70 30 40 25 70 30 40 25 80 COP db EER EWT MBtuh wb — — — — — — 30 40 LEGEND Coefficient of Performance Dry Bulb Temperature Energy Efficiency Ratio Entering Water Temperature Btuh in Thousands Wet Bulb Temperature * Antifreeze required. 14 POWER INPUT (kW) HEAT OF ABSORPTION (MBtuh) COP 0.82 6.00 3.1 0.84 6.67 3.3 0.88 0.84 0.86 0.90 0.86 0.88 0.92 8.01 5.46 6.09 7.35 4.82 5.40 6.56 3.7 2.9 3.1 3.4 2.6 2.8 3.1 50PEC18 — COOLING, NOMINAL AIRFLOW 600 CFM, 5.0 GPM ENTERING AIR TEMP (F) EWT (F) TOTAL CAPACITY (MBtuh) SENSIBLE CAPACITY (MBtuh) 16.26 15.65 15.05 14.14 13.23 17.40 16.76 16.11 15.13 14.16 19.08 18.37 17.66 16.59 15.52 20.76 19.98 19.21 18.04 16.88 10.82 10.51 10.23 9.86 9.54 12.89 12.52 12.18 11.74 11.37 14.21 13.79 13.42 12.94 12.53 15.54 15.08 14.68 14.15 13.70 50 60 70 70 db 61 wb 85 100 50 60 70 75 db 63 wb 85 100 50 60 70 80 db 67 wb 85 100 50 60 70 85 db 71 wb 85 100 SENSIBLE TO TOTAL RATIO 0.67 0.67 0.68 0.70 0.72 0.74 0.75 0.76 0.78 0.80 0.74 0.75 0.76 0.78 0.81 0.75 0.75 0.76 0.78 0.81 POWER INPUT (kW) HEAT OF REJECTION (MBtuh) EER 0.91 19.36 17.9 1.01 19.11 15.5 1.12 1.27 1.43 0.91 1.02 1.12 1.28 1.44 0.92 1.03 1.13 1.29 1.45 0.93 1.03 1.14 1.30 1.46 18.87 18.47 18.09 20.52 20.23 19.94 19.50 19.06 22.22 21.87 21.52 20.99 20.46 23.93 23.51 23.10 22.48 21.86 13.5 11.1 9.3 19.1 16.5 14.4 11.8 9.9 20.7 17.9 15.6 12.9 10.7 22.3 19.3 16.8 13.9 11.6 50PEC18 — HEATING, NOMINAL AIRFLOW 600 CFM, 5.0 GPM ENTERING AIR TEMP (F) EWT (F) TOTAL CAPACITY (MBtuh) 50 15.37 16.96 18.56 20.16 14.52 16.03 17.54 19.04 13.52 14.93 16.33 17.74 60 70 60 80 50 60 70 70 80 50 60 70 80 80 POWER INPUT (kW) HEAT OF ABSORPTION (MBtuh) COP 1.16 11.39 3.9 1.19 12.89 4.2 1.22 1.25 1.19 1.22 1.25 1.28 1.21 1.25 1.28 1.31 14.38 15.88 10.47 11.87 13.28 14.68 9.37 10.67 11.97 13.27 4.4 4.7 3.6 3.9 4.1 4.4 3.3 3.5 3.7 4.0 50PEC18 — LOW TEMPERATURE HEATING*, NOMINAL AIRFLOW 600 CFM, 5.0 GPM ENTERING AIR TEMP (F) 60 EWT (F) TOTAL CAPACITY (MBtuh) 25 11.15 11.93 13.50 10.54 11.27 12.75 9.81 10.50 11.88 30 40 25 70 30 40 25 80 COP db EER EWT MBtuh wb — — — — — — 30 40 POWER INPUT (kW) HEAT OF ABSORPTION (MBtuh) COP 1.09 7.43 3.0 1.11 8.16 3.2 1.13 1.11 1.13 1.16 1.14 1.15 1.18 9.63 6.74 7.43 8.81 5.93 6.57 7.84 3.5 2.8 2.9 3.2 2.5 2.7 2.9 LEGEND Coefficient of Performance Dry Bulb Temperature Energy Efficiency Ratio Entering Water Temperature Btuh in Thousands Wet Bulb Temperature * Antifreeze required. 15 Performance data (cont) SOUND DATA — SOUND POWER LEVEL, CASING RADIATED OCTAVE BAND SOUND POWER LEVELS db, RE 10-12 WATTS 50PEC UNIT 125 250 500 1000 2000 4000 8000 09 64.5 59.0 47.0 43.0 34.0 30.0 27.5 AHRI Sound Rating Bels 5.643 12 65.0 57.5 52.0 44.0 37.0 32.5 27.5 6.008 15 61.5 60.5 53.5 49.5 42.5 39.5 35.0 6.069 18 69.5 62.0 54.5 51.0 45.0 39.5 34.0 6.363 Electrical data 50PEC UNIT SIZE 09 12 15 18 FLA HACR LRA RLA 16 — — — — VOLTAGE v-ph-Hz 115-1-60 208/230-1-60 265-1-60 115-1-60 208/230-1-60 265-1-60 115-1-60 208/230-1-60 265-1-60 208/230-1-60 265-1-60 QTY 1 1 1 1 1 1 1 1 1 1 1 COMPRESSOR RLA 7.0 3.4 2.9 9.6 4.6 3.8 12.7 5.6 4.6 7.4 6.0 LEGEND Full Load Amps Heating, Air Conditioning and Refrigeration Locked Rotor Amps Rated Load Amps LRA 45.6 22.2 18.8 58.4 27.9 22.2 63.0 29.0 20.0 33.0 28.0 QTY 1 1 1 1 1 1 1 1 1 1 1 BLOWER FLA 2.1 0.7 1.0 2.1 0.7 1.0 1.3 0.8 0.8 0.8 0.8 HP 0.10 0.10 0.10 0.10 0.10 0.10 0.25 0.25 0.25 0.25 0.25 MIN CIRCUIT MAX FUSE/ AMPS HACR 10.9 5.0 4.6 14.1 6.5 5.8 17.2 7.8 6.6 10.1 8.3 15 15 15 20 15 15 25 15 15 15 15 Application data Aquazone™ water source heat pump products are available in a flexible, efficient array of models, which can be used in all types of water loop, ground water, and ground loop type systems. Use Aquazone products to provide optimal energy efficient solutions and adapt to the most challenging design requirements. AQUAZONE PRODUCT GUIDE 50 SERIES 50HQP,VQP TYPE SIZE (tons) Large Capacity 6-20 (HQP) 6-30 (VQP) 50PC Compact 1/ -6 2 50PS Premium Efficiency 1/ -6 2 High Efficiency Console 3/ -11/ 4 2 Premium Efficiency 2-6 50PEC 50PT 50PSW Water-to-Water 2-35 APPLICATION Environmentally balanced unit with Puron® refrigerant (R-410A) designed to handle large zoned areas for all geothermal and boiler/tower applications. Compact WSHP with Puron refrigerant (R-410A) for boiler/tower, ground water, or ground loop systems. Premium, ultra efficient unit with Puron refrigerant (R-410A) for new boiler/tower, ground water, or ground loop systems. Efficient console unit with Puron refrigerant (R-410A) and attractive design for finished interior, under-window installations. Premium, ultra efficient 2-stage unit with Puron refrigerant (R-410A) for new boiler/ tower, ground water, or ground loop systems. Efficient unit with Puron refrigerant (R-410A) serves as an alternative to preheat or cool air. Unit can be used as a stand-alone or supplemental boiler/chiller in most hydronic heating applications. Also conditions process fluids, lubricants, and refrigerants. Water loop system Water loop (or boiler/tower) system applications typically include a number of units plumbed to a common piping system. For optimal performance, design this system between 2.25 and 3 gpm per ton of cooling capacity. The system is comprised of highly efficient, packaged, reverse cycle heat pump units, interconnected by a water loop. The water circuit serves as both a sink and source for heat absorption and rejection and is designed for entering water temperatures between 60 F and 90 F. Within this temperature range, units can heat or cool from the same water source. Transferring heat from warm to cold spaces in the building, whenever they coexist, conserves energy rather than creating new heat. Refer to the Carrier Water Source Heat Pump System Design Guide for assistance designing water loop systems. The guide includes a practical approach for the latest and most current design recommendations including: • Horizontal, vertical, console, rooftop and water-towater product applications. • Ventilation methods and system design, including energy recovery. • Acoustical considerations for different product types. • Addressing IAQ issues such as condensate removal, humidity control. • Air distribution design, including diffuser selection/ layout and ductwork design. • Hydronic system design, including pipe sizing/layout and boiler/tower sizing. • Control configurations such as stand alone, DDC, DCV (demand controlled ventilation), and VVT® (variable volume and temperature). • WSHP efficiency/operational cost comparison chart. • System variations such as a system without a boiler, variable pumping, and VAV for interior use. Ground water systems To use Aquazone units in ground water applications, the extended range should be specified. This will provide factory-installed coaxial coil insulation to prevent condensate from dripping when entering water temperatures are below 50 F. In addition, the copper coaxial coil installed on the Aquazone units may not be suitable for all water conditions. Refer to the Water Conditioning section for proper coaxial coil material selection. Surface water system — This system is typically located near a lake or pond. In this application, the loop can be submerged in a series of coils beneath the water surface. The number of coils required depends on system load and design. This application requires minimum piping and excavation. Open loop system — Use this system where ground water is plentiful. In this application, ground water is pumped through supply piping from the well to the building. The water is then pumped back into the ground through a discharge well as it leaves the building. An additional heat exchanger is usually installed between the building water piping system and the ground water piping system. This design limits piping and excavation. Aquazone units are rated to extremely low temperatures to self-adjust the refrigeration circuit. Open loop systems may require water regulating valves. Ground loop systems There are many commonly specified designs for ground loop applications. Typical designs include vertical loops and horizontal loops. In some applications, water is piped from the ground or lake directly to the water source heat pump. This system only requires piping to get the water from the source to the unit. NOTE: When using Aquazone water source heat pumps in ground loop systems, refer to the design considerations in the ground water system section. Horizontal ground loop — Use this system when adequate space is available and trenching can be easily accomplished. A series of parallel pipes are laid out in trenches 3 to 6 feet below the ground surface, and then back-filled. Often, multiple pipes are used to maximize each trench’s heat transfer capability. Ground conditions, heating and cooling requirements, and system design determine piping requirements and ground loop field size. Vertical ground loop — Use this system in vertical borehole applications. This design is well suited for retrofit applications when space is limited or where landscaping is already complete and minimum site disruption is desired. The vertical ground loop system contains a single loop of pipe inserted into a hole. The hole is back-filled and grouted after the pipe is inserted. The completed loop is concealed below ground. The number of loops required depends on ground conditions, heating and cooling requirements, and the depth of each hole. Hybrid systems — In some applications, it may be beneficial to incorporate a cooling tower into the ground loop 17 Application data (cont) system to reduce the overall cost. A hybrid system discards excess heat into the air and increases the cooling performance of the ground loop. Condensate drainage Connect the console unit condensate drain to the building condensate drain with a flexible, non-pressure rated plastic hose. Be sure to avoid kinks in this hose to ensure an unobstructed flow of condensate from the unit to the drain. The condensate hose’s horizontal run is usually too short to pose any drainage problems; however, make sure this line is pitched at least 1 in. for every 10 ft of run (in the direction of the flow). Avoid low points and unpitched piping since dirt collects in these areas and may cause stoppage and overflow. Installing a trap or drain in the field is not required unless specified by local codes. The 50PEC units are designated in a blow-thru configuration. The condensate drain pan is located on the outlet side of the blower so that the pressure in the drain pan is higher than the atmospheric pressure. Water conditioning In some applications, maintaining proper water quality may require higher corrosion protection for the water-torefrigerant heat exchanger. Water quality varies from location to location and is unique for each job. Water characteristics such as pH value, alkalinity, hardness, and specific conductance are important when considering any WSHP application. Water typically includes impurities and hardness that must be removed. The required treatment depends on the water quality, as well as the system type. Water problems fall into three main categories: 1. Scale formation caused by hard water reduces the heat transfer rate and increases the water pressure drop through the heat exchanger. As water is heated, minerals and salts are precipitated from a solution and deposited on the inside surface of the pipe or tube. 2. Corrosion is caused by absorption of gases from the air coupled with water on exposed metal. Corrosion is also common in salt-water areas. 3. Organic growths, such as algae, can reduce the heat transfer rate by forming an insulating coating on the inside tube surface. Algae can also promote corrosion by pitting. NOTE: In most commercial water loop applications, Aquazone™ WSHP units use a copper, water-to-refrigerant heat exchanger. Units should also be equipped with a cupronickel heat exchanger for applications where water is outside the copper heat exchanger’s standard contaminant limits. 18 Acoustical design Sound power levels represent the sound that the source, the WSHP unit, produces with no regard to attenuation between the source and the space. Acoustical design goals are necessary to provide criteria for occupied spaces. These goals help ensure that people can be comfortable and communicate effectively over the background noise of the air-conditioning system and other background noise sources. Acoustical design goals are desirable sound pressure levels within a given conditioned space and are represented by noise criteria (NC) curves. Noise criteria (NC) curve levels represent a peak over a full frequency spectrum. A high value in a low frequency band has the same effect on NC level as a lower value in a high frequency band. It is important that sound levels be balanced over the entire spectrum relative to the NC curve. The lower the NC criteria curve, the more stringent the room acoustical design must be to meet the design goals. It is important to know how to convert the unit ratings from sound power (Lw) to sound pressure (Lp). This conversion depends on the specifics of the installation’s acoustical environment. Assessing an area’s acoustical design requires that you compare the sound pressure (Lp) with the NC curve for the selected area. The resulting calculations are compared to the NC curve selected for the area to assess the acoustical design. Some of the factors that affect conversion of sound power to sound pressure and consequent NC level include: • Type of acoustical ceiling • Use of metal or flex duct • Absorption in the occupied space • Location in the occupied space • Open or closed layout plan • Use of open or ducted returns • Orientation of unit to occupant • Use of lined or unlined duct OCTAVE BAND SOUND PRESSURE LEVEL (Lp) ASSOCIATED WITH NC CURVES NOISE CRITERIA CURVES NC-15 NC-20 NC-25 NC-30 NC-35 NC-40 NC-45 NC-50 NC-55 NC-60 NC-65 OCTAVE BAND SOUND PRESSURE LEVEL (Lp) Frequency (Hz) 63 125 250 500 1000 2000 4000 8000 49 36 26 17 17 14 12 11 52 41 33 27 22 19 17 16 54 45 38 31 27 24 22 21 58 49 41 36 31 29 28 27 61 53 45 40 36 34 33 32 64 57 50 45 41 39 38 37 67 61 54 49 46 44 43 42 71 64 58 54 51 49 48 47 74 68 63 58 56 54 53 52 77 71 67 63 61 59 58 57 80 75 71 68 66 64 63 62 WATER QUALITY GUIDELINES CONDITION HX MATERIAL* CLOSED RECIRCULATING† OPEN LOOP AND RECIRCULATING WELL** Scaling Potential — Primary Measurement Above the given limits, scaling is likely to occur. Scaling indexes should be calculated using the limits below. pH/Calcium All N/A pH < 7.5 and Ca Hardness, <100 ppm Hardness Method Index Limits for Probable Scaling Situations (Operation outside these limits is not recommended.) Scaling indexes should be calculated at 150 F for direct use and HWG applications, and at 90 F for indirect HX use. A monitoring plan should be implemented. Ryznar Stability Index 6.0 - 7.5 All N/A If >7.5 minimize steel pipe use. Langelier Saturation Index –0.5 to +0.5 All N/A If <–0.5 minimize steel pipe use. Based upon 150 F HWG and direct well, 85 F indirect well HX. Iron Fouling Iron Fe2+ (Ferrous) <0.2 ppm (Ferrous) All N/A (Bacterial Iron Potential) If Fe2+ (ferrous) >0.2 ppm with pH 6 - 8, O2<5 ppm check for iron bacteria. Iron Fouling <0.5 ppm of Oxygen All N/A Above this level deposition will occur. Corrosion Prevention†† pH 6 - 8.5 6 - 8.5 All Monitor/treat as needed. Minimize steel pipe below 7 and no open tanks with pH <8. <0.5 ppm Hydrogen Sulfide (H2S) At H2S>0.2 ppm, avoid use of copper and cupronickel piping or HXs. All N/A Rotten egg smell appears at 0.5 ppm level. Copper alloy (bronze or brass) cast components are okay to <0.5 ppm. Ammonia Ion as Hydroxide, <0.5 ppm Chloride, Nitrate and Sulfate All N/A Compounds Maximum Chloride Levels Maximum allowable at maximum water temperature. 50 F (10 C) 75 F (24 C) 100 F (38 C) Copper N/A <20 ppm NR NR Cupronickel N/A <150 ppm NR NR 304 SS N/A <400 ppm <250 ppm <150 ppm 316 SS N/A <1000 ppm <550 ppm <375 ppm Titanium N/A >1000 ppm >550 ppm >375 ppm Erosion and Clogging Particulate Size and Erosion <10 ppm of particles and a maximum velocity of 6 fps. <10 ppm (<1 ppm “sandfree” for reinjection) of particles and a maximum All velocity of 6 fps. Filtered for maximum 800 micron size. Any particulate that Filtered for maximum is not removed can potentially clog components. 800 micron size. Brackish Use cupronickel heat exchanger when concentrations of calcium or All N/A sodium chloride are greater than 125 ppm are present. (Seawater is approximately 25,000 ppm.) LEGEND HWG — Hot Water Generator HX — Heat Exchanger N/A — Design Limits Not Applicable Considering Recirculating Potable Water NR — Application Not Recommended SS — Stainless Steel *Heat exchanger materials considered are copper, cupronickel, 304 SS (stainless steel), 316 SS, titanium. †Closed recirculating system is identified by a closed pressurized piping system. **Recirculating open wells should observe the open recirculating design considerations. ††If the concentration of these corrosives exceeds the maximum allowable level, then the potential for serious corrosion problems exists. Sulfides in the water quickly oxidize when exposed to air, requiring that no agitation occur as the sample is taken. Unless tested immediately at the site, the sample will require stabilization with a few drops of one Molar zinc acetate solution, allowing accurate sulfide determination up to 24 hours after sampling. A low pH and high alkalinity can cause system problems, even when both values are within ranges shown. The term pH refers to the acidity, basicity, or neutrality of the water supply. Below 7.0, the water is considered to be acidic. Above 7.0, water is considered to be basic. Neutral water registers a pH of 7.0. To convert ppm to grains per gallon, divide by 17. Hardness in mg/l is equivalent to ppm. 19 Application data (cont) WSHP sound control Analyzing the projected sound level in the conditioned space caused by a WSHP unit is quite involved. The key is to have good sound power ratings (Lw) in dB on the equipment to determine the ductwork, ceiling and room sound attenuation effect. Console units With console units, the fan and compressor are located within the space, and only the casing design attenuates the transmission of sound sources into the space. The designer should carefully review the manufacturer’s acoustical data when selecting console units and use lower fan speeds to minimize space noise. Operating limits Environment This equipment is designed for indoor installation ONLY. Power supply A voltage variation of ± 10% of nameplate utilization voltage is acceptable. AIR LIMITS AIR LIMITS COOLING Minimum ambient air temperature F Maximum ambient air temperature F Minimum evaporator entering air db/wb F Rated air coil entering air db/wb F Maximum evaporator entering air db/wb F Minimum water coil entering fluid temperature F Water loop typical coil entering fluid range temperature F Maximum water coil entering fluid temperature F HEATING Minimum ambient air temperature F Maximum ambient air temperature F Minimum evaporator entering air db F Rated air coil entering air F Maximum evaporator entering air db F Normal water coil entering fluid range F Minimum water coil entering fluid F EXTENDED RANGE OPTION 50 100 68/57 80/67 98/85 50 70/90 110 40 85 50 68 80 25-80* 20* LEGEND db — Dry Bulb wb — Wet Bulb *Antifreeze solution is required at these fluid temperatures. Starting conditions Freeze protection The 50PEC unit will start and operate in an ambient temperature of 50 F, with entering-air temperature at 50 F with both air and water at the flow rates used in the AHRI/ ISO Standard 13256-1 rating test, for initial start-up in winter. NOTE: These are not normal or continuous operating conditions. Such a start-up should be used to bring the building space up to occupancy temperature. Applications where systems are exposed to outdoor temperatures below freezing (32 F) must be protected from freezing. The most common method of protecting water systems from freezing is adding glycol concentrations into the water. Use design care when selecting both the type and concentrations of glycol due to the following: • Equipment and performance may suffer with high concentrations of glycol and other antifreeze solutions • Loss of piping pressure may increase greatly, resulting in higher pumping costs • Higher mixture viscosity may cause excess corrosion and wear on the entire system • The water’s acidity may be greatly increased, promoting corrosion Glycol promotes galvanic corrosion in systems of dissimilar metals. The result is corrosion of one metal by the other, causing leaks. 20 Controls — WSHP Open sequence of operation The WSHP Open multi-protocol controller will control mechanical cooling and heating outputs based on its own space temperature input and set points. An optional CO2 IAQ (indoor air quality) sensor mounted in the space can maximize the occupant comfort. The WSHP Open controller has its own hardware clock that is automatically set when the heat pump software is downloaded to the board. Occupancy types are described in the scheduling section below. The following sections describe the functionality of the WSHP Open multi-protocol controller. All point objects that are referred to in this sequence of operation will be referenced to the objects as viewed in the BACview6 handheld user interface. Scheduling Scheduling is used to start/stop the unit based upon a time period to control the space temperature to specified occupied heating and cooing set points. The controller is defaulted to control by occupied set points all the time, until either a Time Schedule is configured with the Equipment Touch™ interface, i-Vu® Open, or a third party control system Enables/Disables the BAS On/Off point. Your local time and date must be set for these functions to operate properly. The occupancy source can be changed to one of the following: Occupancy schedules — The controller will be occupied 24/7 until a Time schedule has been configured using either i-Vu Open, Equipment Touch or a third party control system Enables/Disables the BAS On/Off point. This can be disabled by going to Config>Unit>Occupancy Schedules and changing the point from Enable to Disable. NOTE: This point must be Enabled in order for i-Vu Open or Bacview6 to assign a Time schedule to the controller. Schedule_Schedule — The unit will operate according to the schedule configured and stored in the unit. The schedule is accessible via the Equipment Touch user interface, i-Vu Open, or Field Assistant. The daily schedule consists of a start/stop time (standard or 24 hour mode) and seven days of the week, starting with Monday and ending on Sunday. Occupancy input contact (option) — If configured for remote occupancy control (default), the WSHP Open controller has the capability to use an external dry contact closure to determine the occupancy status of the unit. You will need to disable the Occupancy Schedules in order to utilize the Occupancy Contact Input. The control will cause the unit to go into an occupied mode whenever the abnormal input is sensed. After the input returns to its normal state, the unit will stay in the occupied mode for the configured Occupancy Override Delay period (15 minutes default). NOTE: Scheduling can only be controlled from one source. BAS (building automation system) on/off — For use with a Building Automation System that supports network scheduling, you will need to disable the Occupancy Schedules so the BAS system can control the unit through a network communication and the BAS scheduling function. NOTE: Scheduling can only be controlled from one source. Global occupancy scheduling — The WSHP Open controller has the capability to read the occupancy status from another unit so that a group of WSHPs can be controlled from a single occupancy schedule. The local Occupancy Schedules must be disabled in order to utilize the global occupancy input. NOTE: Scheduling can only be controlled from one source. BACnet network occupancy input — The WSHP Open controller has the capability to accept an external BACnet Binary Network Input for occupancy control. This function is only compatible with units used in BACnet systems. You will need to configure the “System Occupancy” BACnet network input point to locate the device and point name where the external occupancy point information resides. Also Occupancy Schedules must be disabled in order to utilize this input. NOTE: Scheduling can only be controlled from one source. Fire/smoke detector (FSD) input (field optional) The WSHP Open controller has the capability to read the status of a normally closed FSD contact input to determine if a fire or smoke detector alarm is present. If the controller determines an alarm condition is present, all heating, cooling and the fan are disabled. The normal state of the switch is factory set to Normally Closed and cannot be changed. Shutdown input The WSHP Open controller has a shutdown input (software) which when set to its Active mode will cause the WSHP to safely shut down in a controlled fashion. Heating and cooling will be disabled after any minimum runtime conditions expire and the fan will be disabled after the fan off timer expires. All alarms are reset but any active alarm will remain active. After the shutdown input transitions from Active mode to Inactive mode, the WSHP Open controller will restart after the configured power fail restart delay expires. Indoor fan The indoor fan will operate in any one of three modes depending upon the user configuration selected. Fan mode can be defined/selected as Auto, Continuous, or Always On. In Auto mode the fan is in intermittent operation during both occupied and unoccupied periods. Continuous fan is intermittent during unoccupied periods and continuous during occupied periods. Always On operates the fan continuously during both occupied and unoccupied periods. In the default mode, Continuous, the fan will be turned on whenever any one of the following is true: • It is in occupied mode. Determined by its occupancy status. • Whenever there is a demand for cooling or heating in the unoccupied mode. • When there is a call for dehumidification (optional). When power is reapplied after a power outage, there will be a configured time delay of 5 to 600 seconds before starting the fan. There are also configured fan delays for Fan On and Fan Off. The fan on delay defines the delay time (0 to 30 seconds; default 10) before the fan begins to 21 Controls — WSHP Open sequence of operation (cont) operate after heating or cooling is started while the fan off delay defines the delay time (0 to 180 seconds; default 45) the fan will continue to operate after heating or cooling is stopped. The fan will continue to run as long as the compressors, heating stages, or the dehumidification relays are on. If the SPT failure alarm or condensate overflow alarm is active; the fan will be shut down immediately regardless of occupancy state or demand. Automatic independent fan speed control — The WSHP Open controller is capable of controlling up to three fan speeds. The motor will operate at the lowest speed possible to provide quiet and efficient fan operation with the best latent capability. The motor will increase speed if additional cooling or heating is required to obtain the desired space temperature set point. The control increases the motor's speed as the space temperature rises above the cooling or below the heating set point. The amount of space temperature increase above or below the set point required to increase the fan speed is user configurable in the set point. Also, the control will increase the fan speed as the supply-air temperature approaches the configured minimum or maximum limits. Fan speed control - during heating — Whenever heat is required and active, the control continuously monitors the supply air temperature to verify it does not rise above the configured Maximum Heating SAT Limit (110 F default). As the SAT approaches this value, the control will increase the fan speed as required to ensure the SAT will remain 5° F below the limit. This feature provides the most quiet and efficient operation by operating the fan at the lowest speed possible. Fan speed control - during cooling — Whenever mechanical cooling is required and active, the control continuously monitors the supply-air temperature to verify it does not fall below the configured Minimum Cooling SAT Limit (50 F default). As the SAT approaches this value, the control will increase the fan speed as required to ensure the SAT will remain 5° F above the limit. Fan will operate at lowest speed to maximize latent capacity during cooling. Fan status (option) An optional input can be configured as either an occupancy input contact or a fan status input. If configured as fan status, the controller will compare the status of the fan to the desired commanded state. Whenever the fan is commanded to run (ON), the fan status will be checked and verified to match the commanded state. If the fan status is not on, then a fan status alarm will be generated after 1 minute and the equipment's compressor(s) and auxiliary heat will be disabled and the optional OA damper will close (if equipped). Cooling The WSHP Open controller will operate one or two stages of compression to maintain the desired cooling set point. The compressor outputs are controlled by the PI (proportional-integral) cooling loop and cooling stages capacity algorithm. They will be used to calculate the desired number of stages needed to satisfy the space by comparing the space temperature (SPT) to the appropriate cooling set point. The waterside economizer, if applicable, will be used for first stage cooling in addition to the compressor(s). The 22 following conditions must be true in order for the cooling algorithm to run: • Cooling is set to Enable • The Fire/Smoke Input and Shutdown modes are inactive • Heat mode is not active and the compressor time guard(s) have expired • Condensate Overflow input is Normal • Fan Status is true (if option is enabled) • If occupied, the SPT is greater than the occupied cooling set point • Space temperature reading is valid • If unoccupied, the SPT is greater than the unoccupied cooling set point. • If economizer cooling is available and active and the economizer alone is insufficient to provide enough cooling. • OAT is greater than the cooling lockout temperature if OAT is available • Condenser water pump is on (if condenser water linkage active) If all the above conditions are met, the compressors will be energized as required, otherwise they will be de-energized. If cooling is active and should the SAT approach the minimum SAT limit, the fan will be indexed to the next higher speed. Should this be insufficient and if the SAT falls further (equal to the minimum SAT limit), the fan will be indexed to the maximum speed. If the SAT still continues to fall 5° F below the minimum SAT limit, all cooling stages will be disabled. During Cooling, the reversing valve output will be held in the cooling position (either B or O type as configured) even after the compressor is stopped. The valve will not switch position until the heating mode is required. The configuration screens contain the Min SAT parameter as well as cooling lockout based on outdoor air temperature (OAT), both can be adjusted to meet various specifications. There is a 5-minute off time for the compressor as well as a 5-minute time delay when staging up to allow the SAT to achieve a stable temperature before energizing a second stage of capacity. Likewise, a 45-second delay is used when staging down. After a compressor is staged off, it may be restarted again after a normal time-guard period of 5 minutes and if the supply air temperature has increased above the minimum supply air temperature limit. The WSHP Open controller provides a status input to monitor the compressor operation. The status is monitored to determine if the compressor status matches the commanded state. This input is used to determine if a refrigerant safety switch or other safety device has tripped and caused the compressor to stop operating normally. If this should occur, an alarm will be generated to indicate the faulted compressor condition. Reverse cycle heating The WSHP Open controller will operate one or two stages of compression to maintain the desired heating set point. The compressor outputs are controlled by the heating PI (proportional-integral) loop and heating stages capacity algorithm. They will be used to calculate the desired number of stages needed to satisfy the space by comparing the space temperature (SPT) to the appropriate heating set point. The following conditions must be true in order for the heating algorithm to run: • Heating is set to Enable • The Fire/Smoke Input and Shutdown modes are inactive • Cool mode is not active and the compressor time guard has expired • Condensate Overflow input is Normal • Fan Status is true (if option is enabled) • If occupied, the SPT is less than the occupied heating set point • Space temperature reading is valid • If unoccupied, the SPT is less than the unoccupied heating set point • OAT is less than the heating lockout temperature if OAT is available. • Condenser water pump is on (if condenser water linkage active) If all the above conditions are met, the heating outputs will be energized as required, otherwise they will be deenergized. If the heating is active and should the SAT approach the maximum SAT limit, the fan will be indexed to the next higher speed. Should this be insufficient, then if the SAT rises further and reaches the maximum heating SAT limit, the fan will be indexed to the maximum speed. If the SAT still continues to rise 5° F above the maximum limit, all heating stages will be disabled. During heating, the reversing valve output will be held in the heating position (either B or O type as configured) even after the compressor is stopped. The valve will not switch position until the cooling mode is required. The configuration screens contain the Max SAT parameter as well as heating lockout based on outdoor air temperature (OAT), both can be adjusted to meet various specifications. There is a 5-minute off time for the compressor as well as a 5-minute time delay when staging up to allow the SAT to achieve a stable temperature before energizing a second stage of capacity. Likewise, a 45-second delay is used when staging down. After a compressor is staged off, it may be restarted again after a normal time-guard period of 5 minutes and if the supply air temperature has fallen below the maximum supply air temperature limit. The WSHP Open controller provides a status input to monitor the compressor operation. The status is monitored to determine if the compressor status matches the commanded state. This input is used to determine if a refrigerant safety switch or other safety device has tripped and caused the compressor to stop operating normally. If this should occur, an alarm will be generated to indicate the faulted compressor condition. Indoor air quality (IAQ) and demand controlled ventilation (DCV) If the optional indoor air quality sensor is installed or the network input point “System Space AQ” is utilized, the WSHP Open controller can maintain indoor air quality, with a field-installed modulating OA damper providing demand controlled ventilation. The control operates the modulating OA damper during occupied periods. The control monitors the CO2 level and compares it to the configured set points and adjusts the ventilation rate as required. The control provides proportional ventilation to meet the requirements of ASHRAE specifications by providing a base ventilation rate and then increasing the rate as the CO2 level increases. The control will begin to proportionally increase ventilation when the CO2 level rises above the start ventilation set point and will reach the full ventilation rate when the CO2 level is at or above the maximum set point. A user configurable minimum damper position ensures that proper base ventilation is delivered when occupants are not present. The IAQ configurations can be accessed through the configuration screen. The following conditions must be true in order for this algorithm to run: • Damper control is configured for DCV. • The Fire/Smoke Input and Shutdown modes are inactive. • Fan Status is true (if option is enabled). • The unit is in an occupied mode. • IAQ sensor reading is greater than the DCV Start Control set point. The control has four user adjustable set points: DCV start control set point, DCV Maximum Control set point, Minimum damper position and the DCV Maximum damper position. NOTE: In order for the damper to maintain proper base ventilation, the fan must be configured to operate in either the Continuous or Always On mode. Two-position OA damper — The control can be configured to operate as a ventilation damper in a 2-position ventilation mode to provide the minimum ventilation requirements during occupied periods. This control operation still utilizes the modulating damper actuator. Demand limit The WSHP Open controller has the ability to accept three levels of demand limit from the BACnet network. In response to a demand limit, the unit will decrease its heating set point and increase its cooling set point to widen the range in order to immediately lower the electrical demand. The amount of temperature adjustment in response is user adjustable for both heating and cooling and for each demand level. The response to a particular demand level may also be set to zero. Power failure restart delay The control provides a user configurable delay when recovering from a power failure or SHUTDOWN mode or when transitioning from unoccupied to occupied mode in order to prevent excessive demand when many units start simultaneously. Each unit can be user configured for a unique 23 Controls — WSHP Open sequence of operation (cont) delay between 5 and 600 seconds. The factory programmed default delay is 180 seconds. Fire/smoke detector alarm The control monitors the voltage input to J1-9 to detect if a smoke detector or fire detector Normally Closed contact has opened, indicating an alarm condition. The control will verify the presence of 24 vac on this input. If the input should open at any time, an alarm will be generated after 3 seconds and the equipment (fan, compressor, auxiliary heat and damper) will immediately return to an OFF or closed state. Space temperature alarms The control provides the ability to generate an alarm whenever the space temperature exceeds the alarm set point. A separate occupied hysteresis and fixed unoccupied high and low alarm set points are provided. The control provides a 5minute alarm delay during unoccupied periods. During occupied periods, the control uses the occupied temperature set points and applies the hysteresis value to determine the alarm set points. Whenever an occupancy transition from unoccupied to occupied occurs or the occupied temperature set points are changed causing an alarm condition to occur, the control will automatically calculate an alarm delay (equivalent to the configured delay time in minutes per degree F times the temperature error that occurred plus 15 minutes). This will prevent nuisance alarms whenever an occupancy change occurs and allows time for the unit to correct an alarming temperature condition. Condenser water temperature alarm The control has 4 configurable alarm limits for condenser water temperature. The control will verify that the water temperature is within operating range (between high and low limits) for the specific operating mode (heating or cooling) before energizing the compressor. Once the compressor is started, the condenser water temperature is further monitored to verify that it is within limits to ensure sufficient water is flowing through the coil. Should the leaving water temperature rise above or fall below the appropriate limits, an alarm is generated and the compressor will be shut down if the condition occurs for more than 15 seconds. Supply air temperature alarm The control has 2 configurable alarm limits for supply air temperature. The control will verify that the supply air temperature is within operating range (between high and low limits) whenever the compressor or auxiliary heat is operating. Should the air temperature rise above or fall below the appropriate limit, an alarm is generated if the condition occurs for more than 1 minute. High condensate/overflow alarm The control will monitor a discrete input to determine the state of a condensate level switch. The input can be configured to alarm on either an open or closed switch condition. Should this input be in an alarm state, the control will start a timer and after the timer exceeds a configurable Condensate Overflow Alarm Delay limit (10-second default), the control will generate an alarm and the unit will disable the compressor and fan outputs. 24 Fan status alarm (optional) The control generates a fan status alarm should the fan status input detect the fan is OFF after any fan speed output has been enabled. A 30-second alarm delay is used to allow the fan sufficient time to start operating before an alarm condition is detected. The control monitors the fan output and if the fan is operating at any speed, the fan status must detect the fan is operating. Compressor status alarm The control generates a compressor failure alarm should the compressor status input detect the compressor is OFF after the compressor output has been energized. A 6-minute alarm delay is used to allow the compressor to start (prevents alarms due to time guard operation) before an alarm condition is detected. The control monitors the compressor output and if the compressor output is energized, the compressor status input must detect the compressor operation. Filter status alarm The control provides the ability to generate a dirty filter alarm after the number of fan run hours exceeds a configurable filter alarm timer limit. The control monitors the fan output and if the fan is operating at any speed, it accumulates run time. Should the fan run time hours exceed the configurable limit, an alarm is generated. To reset the alarm timer after the alarm has been generated, a Reset Filter Alarm input is provided. The filter alarm can be disabled by setting the Filter Alarm Timer Delay to zero (factory default). Indoor air quality alarm The control provides the ability to generate a high CO2 level alarm during occupied periods whenever the CO2 sensor value exceeds the user adjustable limit. Whenever an occupancy transition from unoccupied to occupied occurs, or the occupied alarm limit is changed to a value that causes an alarm condition to occur, the control will automatically calculate an alarm delay: the configured delay time in minutes ppm times the error that occurred + 15 minutes This prevents nuisance alarms from occurring when occupancy changes or the set point is changed. The IAQ alarm can be disabled by setting Occupied High IAQ Alarm Limit to zero. Relative humidity alarm The control provides the ability to generate an alarm whenever the space relative humidity exceeds the alarm set point. Separate occupied and unoccupied high humidity alarm set points are provided. The control provides a 5-minute alarm delay during unoccupied periods. During occupied periods, the controller uses the occupied high RH alarm limit. Whenever an occupancy transition from unoccupied to occupied occurs, or the occupied high alarm limit is lowered causing an alarm condition to occur, the control will automatically calculate an alarm delay: the configured delay time in minutes % RH times the humidity error condition that occurred + 15 minutes This will prevent nuisance alarms whenever an occupancy change occurs and allows time for the unit to correct an alarming humidity condition. Condenser water linkage failure alarm (if condenser water linkage was active) The control generates a condenser water linkage failure alarm should linkage fail after once being active. The linkage status is monitored and should it fail to be updated from the loop controller, then a Condenser Water Linkage alarm is generated. A 6-minute alarm delay is provided to prevent false alarms from occurring. NOTE: This alarm can only be reset by re-establishing linkage and correcting the condition that caused the linkage failure to occur or by setting the SHUTDOWN point to Active momentarily. Airside linkage failure alarm (if airside linkage was active) The control generates an airside linkage failure alarm should linkage fail after once being active. The linkage status is monitored and should it fail to be updated from the Master Zone Controller, then an airside linkage alarm is generated. A 6-minute alarm delay is provided to prevent false alarms from occurring. NOTE: This alarm can only be reset by re-establishing linkage and correcting the condition that caused the linkage failure to occur or by setting the SHUTDOWN point to Active momentarily. OAT sensor alarm (if network OA temperature was active) The control generates an OAT sensor failure alarm should the value of OAT fail to be updated through the network after once being active. The update status is monitored and should it fail to be updated, then an OAT sensor alarm is generated. An alarm delay (approximately 1 hour) is provided to prevent false alarms from occurring while minimizing the required update rate for OAT. NOTE: This alarm can be reset by setting the SHUTDOWN point to Active momentarily. ZS sensor alarm (if ZS sensor was active) The control generates a ZS sensor failure alarm should the ZS sensor fail to communicate with the control. The update status is monitored and should it fail to be updated, then the alarm is generated. 25 Guide specifications Console Water Source Heat Pumps HVAC Guide Specifications Size Range: 6,220 to 20,760 Btuh Cooling Capacity 6,810 to 20,160 Btuh Heating Capacity Carrier Model Number: 50PEC Part 1 — General 1.01 SYSTEM DESCRIPTION A. Install water source heat pumps, as indicated on the plans with capacities and characteristics as listed in the schedule and the specifications that follow. B. Units shall be individually packaged with wooden skid covered with protective corner posts and plastic stretch wrapping for maximum protection. 1.02 QUALITY ASSURANCE A. All equipment shall be rated and certified in accordance with ANSI/AHRI/ASHRAE/ISO (American National Standards Institute/Air-Conditioning, Heating and Refrigeration Institute/American Society of Heating, Refrigerating, and Air-Conditioning Engineers/International Organization for Standardization) 13256-1, latest edition, and safety listed in accordance with NRTL (Nationally Recognized Testing Lab) or CSA (Canadian Standards Association). All units shall have AHRI/ISO and NRTL or CSA labels. B. All units shall be factory tested under normal operating conditions at nominal water flow rates. Units which are tested without water flow are not acceptable. Part 2 — Product 2.01 EQUIPMENT A. Heat Pump Assembly: Units shall be designed to operate throughout the range of entering fluid temperature of 50 F to 110 F in the cooling mode and 30 F to 80 F in the heating mode (extended range allows for 20 F to 80 F in the heating mode). The units shall be manufactured in an ISO 9001 certified facility. B. Unit Cabinet: 1. Cabinet work shall include two separate integral assemblies: cabinet and subbase. Cabinet shall be factory fabricated from heavy gage galvanized steel, finished with powder coat paint. Cabinet dimensions are in accordance with drawings and are manufactured for left or right water discharge piping. Cabinet shall be singlepiece construction. Removal of the cabinet shall give complete side and front access to unit for routine servicing. The cabinet is mounted onto the subbase and secured with two screws for security. A wall mounting bracket secured to the subbase shall be provided. Air flow is bottom intake-top discharge. Cabinets will be factory fabricated specifically for left hand or right hand connections as specified. Cabinet shall be 26 slope top style, flat top cabinet is not acceptable. 2. An access door shall be provided to cover the swing down control section. 3. Factory mounted 33/8 in. subbase is constructed of heavy gage painted steel. Cutouts are provided for floor connections and outside air. Includes integral filter mounts to support a bottom mount permanent, washable, aluminum mesh filter. Subbase has a bracket that may be secured to the wall to provide stability. C. Chassis: Chassis is of compact design and of the same dimensions for all model sizes. Dimensions must match details on drawings. Chassis mounts directly on support structures provided by the subbase and shall be removable from the subbase without dismantling the subbase. Both compressors and coil compartments shall be thermally and acoustically insulated, and have removable steel cover plates giving double acoustical protection between the two compartments. Compressor is mounted to the bottom of chassis with a 2-piece basepan to reduce noise transmission and vibration. The compressor access panel shall have a closed cell foam insulation for extra quiet operation. Fiberglass insulation is not acceptable on compressor access panel. The stainless steel condensate drain pan shall be IAQ with positive double slope and be removable without disturbing the evaporator assembly for cleaning as needed. D. Fan and Motor Assembly: Unit blower is three-speed high efficiency PSC type. Motor is direct connected to two double width, double inlet forward curved oversized centrifugal blower wheels that are selected for quiet operation, and balanced to minimize vibration. Blower wheel access is through removable blower inlet rings. Motor and blower assembly shall be removable without removing the chassis. E. Refrigerant Components: 1. Units shall have a sealed refrigerant circuit including a rotary compressor, a refrigerant metering device, a finned tube refrigerant-to-air heat exchanger, a reversing valve, a coaxial (tube-intube) refrigerant-to-water heat exchanger, and safety controls including a high-pressure sensor, a loss-of-charge sensor to protect against loss of refrigerant, and low water temperature (freezestat) sensor. 2. Rotary compressors shall have thermal overload protection and shall be located in an insulated compartment to minimize sound transmission. Units shall have the compressor mounted on isolators to reduce noise and vibration transmission. 3. Coils shall be coated using an electro coating process for protection against most airbourne chemicals. 4. Refrigerant-to-water heat exchangers shall be of copper inner water tube and steel refrigerant outer tube design rated to withstand 600 psig working refrigerant pressure. 5. Drain pan shall be constructed of stainless steel and have powder coated application to inhibit corrosion. 6. Reversing valve shall be four-way solenoidactivated refrigerant valves which shall fail to heating operation. If the unit fails to cooling a low-temperature thermostat must be provided to prevent over-cooling of the room. 7. Optional coaxial water-to-refrigerant heat exchangers shall be cupronickel. 8. Standard extended range for units operating with entering water temperatures below dew point. For use in operating range with entering water temperatures from 20 to 110 F. F. Controls and Safeties: 1. Electrical: A control box shall be located within the unit and shall contain controls for compressor, reversing valve and fan motor operation. 2. Piping: a. Copper tubes with a 5/8-in. OD dimension shall be provided on the supply and return water connections for the purpose of forming a sweat connection to field-supplied distribution piping. b. Optional threaded connections: A 1/2-in. female pipe threaded fitting shall be factory mounted on the supply and return water connections. 3. Unit Controls: Safety devices on all units shall include lowpressure sensor or loss-of-charge switch, highpressure switch, low water temperature sensor, and condensate overflow switch. 4. The standard unit mounted controller shall provide a tactile touchpad for temperature, fan and mode adjustment and provide a digital display of temperature in either degrees Fahrenheit or Celsius. The unit mounted controller shall provide an LED display for indication of unit operating mode as well as fan speed and fault indication for high or low pressure lockout. Options and features shall include: a. Adjustable temperature set point from 60 F through 80 F (15.5 C through 26.7 C). b. Adjustable temperature differential between 1 F and 6° F (0.6 C and 3.3° C). c. Manual or automatic changeover. d. High and low fan speed control. e. Constant fan speed or fan speed cycling with compressor. f. A 5-minute anti-short cycling delay. g. Random start. h. A 90-second low pressure bypass timer. i. Intelligent reset to allow unit to automatically restart after 5 minutes if a fault is no longer active. 5. The optional Complete C electronic control system shall interface with the remote heat pump (Y,O) wall thermostat (mechanical or electronic). The control system shall have the following features: a. Anti-short cycle time delay on compressor operation; time delay shall be 5 minutes minimum. b. Random start on power-up. c. Low voltage protection. d. High voltage protection. e. Condensate overflow shutdown. f. Unit shutdown on low refrigerant pressures. g. Unit shutdown on high or low water temperature (selectable for antifreeze solutions). h. Option to reset unit at thermostat or disconnect. Fault type shall be retained in memory if reset at thermostat. i. Automatic intelligent reset. Unit shall automatically restart 5 minutes after shutdown if the fault has cleared. Should a fault occur 3 times sequentially, then lockout will occur. j. Ability to defeat time delays for servicing. k. Light-emitting diode (LED) to indicate high pressure, low pressure, improper voltage, water coil freeze protection, air coil freeze protection, condensate overflow, and control status. l. Remote fault type indication at thermostat. m. Single harness connection for all safety devices. n. Selectable 24-v or pilot duty dry contact alarm output. o. 24-v output to cycle a motorized water valve with compressor contactor. p. The control box components shall be easily accessible with a swing out control compartment. 6. The optional Deluxe D electronic control shall have all the features of the Complete C control, with the following additional features: a. Pump-valve relay. b. Energy Management Switch to enable remote operation of WSHP. c. Phase Monitor 7. WSHP Open Multiple Protocol Control: a. Units shall have all the features above (Complete C board) and the state of the art WSHP Open multiple protocol interface board will have the ability to be viewed in the 27 Guide specifications (cont) crystal diode) display, alarm indicator and fan speed control. d. ZS Pro-F sensor with communication port, occupancy status indicator, local occupancy override, set point adjustment, LCD display, alarm indicator, fan speed control, cooling/heating/fan only mode control and F to C conversion. 9. Optional Controls: a. Console units capable of remote mounted controllers shall be field supplied with a 24 volt anticipating type wall thermostat. The thermostat shall be a manual changeover type with an OFF, HEAT, COOL selectors switch and a FAN, AUTO selector switch. The thermostat shall be an auto changeover type with an OFF, AUTO selector switch and a FAN, AUTO selector switch. The Hi/Lo fan switch shall be unit mounted for fan speed control. b. Outdoor air dampers shall be motorized with a spring return. The damper shall open when Cooling or Heating mode selection is made from the unit-mounted switches. With a remote thermostat, the damper shall open any time the fan is in operation. G. Electrical Requirements: 1. A control box shall be located within the unit compressor compartment and shall contain a 40 va transformer, 24-volt activated, 3-pole compressor contactor, terminal block for thermostat wiring and solid-state controller for complete unit operation. Electro-mechanical operation WILL NOT be accepted. 2. Units shall be nameplated for use with timedelay fuses or HACR circuit breakers. 3. Unit controls shall be 24-volt and provide heating or cooling as required by the remote thermostat. 4. Units shall be provided with a factory mounted 2 x 4 junction box with removable cover on the same side as the water connections (left or right) for direct wire connection. This cover may be supplied with a non-fused power disconnect switch for servicing the unit. The unit shall operate with specified voltages 115 volt, 208/ 230 volt or 265 volt, single phase, 60 Hz supply current. Supply power ampacity and maximum fuse size are per electrical specifications marked on each unit’s data plate. Equipment Touch™, System Touch™, or field assistant user interface. All point objects will have the ability to be viewed in the Equipment Touch user interface. The following points must be available at a central or remote computer location: 1) Space temperature. 2) Leaving water temperature. 3) Discharge air temperature. 4) Command of space temperature set point. 5) Cooling status. 6) Heating status. 7) Low temperature sensor alarm. 8) High pressure switch alarm. 9) Fan on/off position of space thermostat. 10) Unoccupied/occupied command. 11) Cooling demand. 12) Heating demand. 13) Fan “ON/AUTO” command. 14) Fault prevention with auto reset. 15) Itemized fault code viewed with Equipment Touch interface. b. Additional WSHP Open multiple protocol control features shall include: 1) Independent fan speed control. Controller shall automatically, based upon space temperature input, operate the fan at the lowest of 2 fan speeds to achieve space temperature set point. 2) Two-position OA (outdoor air) damper 3) Modulating OA damper with DCV (demand controlled ventilation). 4) Power fail restart delay. 8. Multiple-protocol WSHP Open controller remote ZS sensors for DDC (direct digital controls) control options. Only Carrier ZS sensors can be used with the WSHP Open controller. Sensors are available as follows, and all sensors below offer monitoring of space temperature only, or space temperature and CO2, or space temperature and humidity, or space temperature and CO2 and humidity. a. ZS Standard sensor with a communication port. b. ZS Plus sensor with communication port, occupancy status indicator, local occupancy override and set point adjustment. c. ZS Pro sensor with communication port, occupancy status indicator, local occupancy override, set point adjustment, LCD (liquid Carrier Corporation • Syracuse, New York 13221 415 2-15 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Pg 28 Catalog No. 04-52500105-01 Printed in U.S.A. Form 50PEC-10PD Replaces: 50PEC-1APD