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Excel 10 W7753A Unit Ventilator Controller INSTALLATION INSTRUCTIONS PRODUCT DESCRIPTION The W7753A Controller communicates via the 78 kilobaud Echelon® LonWorks® E-Bus Network. The W7753A Unit Ventilator Controller is a Free Topology Transceiver (FTT) LONMARK® Compliant Unit Vent controller in the Excel 10 family product line. Allowable input/output connections consist of wall module points plus two additional resistive sensor inputs, two voltage/ current inputs, four digital inputs and eight digital Triac outputs. This controller can be used to monitor/control HVAC equipment, lighting, and other miscellaneous loads in a distributed network. The controller is field-mounted to the equipment that it controls, and the controller wiring is attached to the screw terminals located on the controller (see Fig. 1). 31 30 29 28 27 26 For the W7753A, any hardware driven by the Triac outputs must have a minimum current draw, when energized, of 25 mA and a maximum current draw of 500 mA. 25 24 23 22 21 20 19 24 DI-4 GND 18 17 DI-3 DI-2 GN 16 2 D DI-1 24 VAC 1 3 4 VAC COM OU 5 6 T OUT OUT 7 8 OUT OUT OU T OUT OUT E LED BY PASS SNSR GN GND D SET PT AI-1 1 2 3 4 5 OHM 6 7 GND A1-2 AI-3 GND AI4 22VDC OHM V/mA V/mA OUT 8 9 10 E-BUS 11 12 13 14 15 E-BUS JACK J3 M12688 Fig. 1. Excel 10 W7753A Unit Ventilator Controller. Put Bar Code Here 95-7520—02 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER INSTALLATION The controller enclosure on the W7753A is constructed of a sheet metal housing and a plastic factory snap-on cover. The controller mounts using two screws inserted through the plastic cover. Use the screws appropriate for the mounting surface. The W7753A can be mounted in any orientation. Ventilation openings were designed into the cover to allow proper heat dissipation regardless of the mounting orientation. Mount the W7753A in a position that allows clearance for wiring, servicing and controller removal. Avoid mounting the W7753A in areas where acid fumes or other deteriorating vapors can attack the metal parts of the controller, or in areas where escaping gas or other explosive vapors are present. See Fig. 2 for mounting dimensions. The W7753A can also be mounted using DIN rail (obtain locally). If using DIN rail also purchase from Augat Inc. part number 2TK2D DIN rail (adapter) two each (See Fig. 3). 2-1/8 (54) 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 24 3 2 4 6 5 7 8 24 VAC 1 DI-4 GND DI-3 DI-2 GND DI-1 VAC COM OUT OUT OUT OUT OUT OUT OUT OUT E LED BYPASS SNSR GND SET PT AI-1 GND AI-2 AI-3 GND AI-4 22VDC E-BUS E-BUS GND OHM OHM V/mA V/mA OUT JACK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 J3 5-5/8 (143) 3-1/16 (77) 5-3/16 (132) 6 (152) M12689 Fig. 2. W7753A mounting dimensions in in. (mm). 95-7520—02 2 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER Power The 24 Vac power from an energy-limited Class II Power Source must be provided to each W7753A Controller. To conform to Class II restrictions (U.S. only), transformers must not be larger than 100 VA. 2 3 A transformer that meets CE mark requirements and that meets the Low Voltage Directive (LVD) requirements must be used in Europe for all installations of this product. More than one W7753A Controller can be powered by a single transformer. Fig. 4 shows power wiring details for a single controller and Fig. 5 depicts multiple controllers using one transformer. IMPORTANT Use the heaviest gauge wire available, up to 14 AWG (2.0 mm2) with a minimum of 18 AWG (1.0 mm2), for all power and earth ground wiring. Screw type terminal blocks are designed to accept up to two 14 AWG (2.0 mm2) conductors, one on each side of the terminal screw. More than two wires that are 14 AWG (2.0 mm2) can be connected with a wire nut. Include a pigtail with this wire group and attach the pigtail to one side of the terminal block. 1 M6857 Fig. 3. W7753A DIN rail mounting. OUTPUT DEVICE POWER Wiring All wiring must comply with applicable electrical codes and ordinances or as specified on installation wiring diagrams. Controller wiring on the W7753A is terminated to the screw terminal blocks located on the top and the bottom of the controller. NOTES: — — — — TRANSFORMER TRIAC LINES TO ACTUATORS AND CONTACTORS W7753A CONNECT POWER TO TERMINALS 24 AND 25 For multiple controllers operating from a single transformer, the same side of the transformer secondary must be connected to the same power input terminal in each controller. The ground terminal (1 on the W7753A) must be connected to a verified earth ground for each controller in the group (see Fig. 5). (Controller configurations are not necessarily limited to three controllers, but the total power draw including accessories cannot exceed 100 VA when powered by the same transformer (U.S. only). See System Engineering form 74-2964 for power wiring recommendations.) All loads on an Excel 10 W7753A Controller must be powered by the same transformer that powers the Excel 10 W7753A Controller. A W7753A Controller can use separate transformers for controller power and load power. Keep the earth ground connection (terminal 1) wire run as short as possible. Refer to Fig. 9 through 14. Do not connect the analog or digital ground terminals (5, 8, 11, 27 and 30) to earth ground. Refer to Fig. 9 through 14. 25 24 22 20 1 EARTH GROUND M12681 Fig. 4. Power wiring details; one Excel 10 per transformer. NOTES: — — Unswitched 24 Vac power wiring can be run in the same conduit as the E-Bus cable. Maintain at least three-inch (76 mm) separation between Triac outputs and E-Bus wiring throughout the installation. See the following IMPORTANT on Heating and Cooling Equipment (UL 1995, U.S. only). IMPORTANT If the W7753A Controller is used on Heating and Cooling Equipment (UL 1995, U.S. only) and the transformer primary power is more than 150 volts, connect the transformer secondary to earth ground (see Fig. 6). For these applications, only one W7753A Excel 10 controller can be powered by each transformer. 3 95-7520—02 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER 24 VAC 120/240 VAC TRANSFORMER W7753A 25 24 1 W7753A W7753A 25 24 1 EARTH GROUND 25 24 1 EARTH GROUND EARTH GROUND M12682 Fig. 5. Power wiring details for two or more Excel 10s per transformer. 24 VAC LINE VOLTAGE GREATER THAN 150 VAC TRANSFORMER 1 W7753A EARTH GROUND 1 EARTH GROUND 1 IF THE W7750 CONTROLLER IS USED IN UL 1995 EQUIPMENT AND THE PRIMARY POWER IS MORE THAN 150 VOLTS, GROUND ONE SIDE OF M12680 TRANSFORMER SECONDARY. Fig. 6. Transformer power wiring details for one Excel 10 used in UL 1995 equipment (U.S. only). Communications Refer to E-Bus Wiring Guidelines, form 74-2865, for a complete description of E-Bus network topology rules. Approved cable types for E-Bus communications wiring are Level IV 22 AWG (0.34 mm2) plenum and non-plenum rated unshielded, twisted pair, solid conductor wire. For nonplenum areas, U.S. part AK3781 (one pair) or U.S. part AK3782 (two pair) can be used. In plenum areas, U.S. part AK3791 (one pair) or U.S. part AK3792 (two pair) can be used. Communications wiring can be run in a conduit, if needed, with non-switched 24 Vac or sensor wiring. If a longer E-Bus network is required, a Q7740A 2-way or Q7740B 4-way repeater can be added to extend the length of the E-Bus. Also a Q7751A Router can be added to partition the system into two segments and effectively double the length of the E-Bus. Only one router is allowed with each Excel 10 Zone Manager, and each network segment can have a maximum of one repeater. Pull the cable to each device on the E-Bus and connect to communication terminals 14 and 15 (W7753A). 95-7520—02 4 NOTES: (For Communications Wiring) — All field wiring must conform to local codes and ordinances (or as specified on the installation drawings). — Approved cable types for E-Bus communications wiring is Level IV 22 AWG (0.34 mm2) plenum and non-plenum rated unshielded, twisted pair, solid conductor wires. For nonplenum areas, U.S. part AK3781 (one pair) or U.S. part AK3782 (two pair) can be used. In plenum areas, U.S. part AK3791 (one pair) or U.S. part AK3792 (two pair) can be used. — Unswitched 24 Vac power wiring can be run in the same conduit as the E-Bus cable. — Do not bundle output wires with sensor, digital input or communications E-Bus wires. — Do not use different wire types or gauges on the same E-Bus segment. The step change in line impedance characteristics would cause unpredictable reflections on the E-Bus. When using different types is unavoidable, use a Q7751A Router at the junction. — In noisy (high EMI) environments, avoid wire runs parallel to noisy power cables, motor control centers, or lines containing lighting dimmer switches, and keep at least 3 in. (76 mm) of separation between noisy lines and the E-Bus cable. — Each daisy-chained E-Bus segment that is on one side of a Q7751A,B Router (can contain up to 60 Excel 10s) and has a length greater than 1640 ft. (500m) must have two E-Bus 209541B Termination Modules, one at each end of the daisy-chain wiring run. — Make sure that neither of the E-Bus wires is grounded. NOTE: If a 209541B Termination Module is required at a the UV controller, connect two of the three termination module wires to the E-Bus terminals. Selecting the appropriate two wires depends on the E-Bus network topology. Refer to the E-Bus Wiring Guidelines, form 74-2865, and the Excel 10 FTT Termination Module Installation Instructions, form 95-7554. For example, using a doubly terminated daisy-chained bus topology, if controllers are on either end of an E-Bus wire run, mount the termination module on the appropriate terminals as shown in Fig. 7. EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER W7753A W7753A 1415 BROWN W7753A 1415 1415 ORANGE PART NO. 209541B TERMINATION MODULE PART NO. 209541B TERMINATION MODULE BROWN ORANGE M12690 Fig. 7. Termination modules (place a wire nut on each remaining wire that is not connected to a controller or device). NOTE: When two or more wires are to be attached to the same terminal, other than 14 AWG (2.0 mm2), be sure to twist them together. Deviation from this rule can result in improper electrical contact. See Fig. 8. Wire to the terminal blocks as follows: 1. Strip 3/8 in. (10 mm) insulation from the conductor. 2. Insert the wire in the required terminal location and tighten the screw to complete the termination. 3. If two or more wires are being inserted into one terminal location, strip 1/2 in. (13 mm) of insulation from the conductors then twist the wires together a minimum of three turns before inserting them. 4. Cut the twisted end of the wires to 3/16 in. (5 mm) before inserting them into the terminal and tightening the screw. 5. Pull on each wire in all terminals to check for good mechanical connection. Wiring Details The W7753A Controller has the terminal arrangements shown in Fig. 9 through 14. Connection for operator access to the E-Bus is provided by plugging the Serial LonTalk® Adapter (SLTA) connector into the E-Bus jack. NOTE: If an Excel 10 Controller or Zone Manager is not connected to a good earth ground, the controller internal transient protection circuitry is compromised and the function of protecting the controller from noise and power line spikes cannot be fulfilled. This can result in a damaged circuit board and require replacement of the controller. Refer to job drawings for specific installation wiring diagrams. TWO 14 AWG (2.0 MM2) WIRES 3/8 (10) 1. STRIP 3/8 IN. (10 MM) FROM WIRES TO BE ATTACHED AT ONE TERMINAL. 2. TWIST WIRES TOGETHER WITH PLIERS (A MINIMUM OF THREE TURNS). 3. CUT TWISTED END OF WIRES TO 3/16 IN. (5 MM) BEFORE INSERTING INTO TERMINAL AND TIGHTENING SCREW. THEN PULL ON EACH WIRE IN ALL TERMINALS TO CHECK FOR GOOD MECHANICAL CONNECTION. M10086 Fig. 8. Attaching two or more wires at terminal blocks. 5 95-7520—02 20 19 18 17 16 WINDOW CONTACT (CONTACT CLOSED = WINDOWCLOSED) 3 + - OCCUPANCY SENSOR (CONTACT CLOSED = OCCUPIED) 24 VAC 17 OUT 7 16 OUT 8 OUT 5 18 OUT 6 OUT 3 OUT 4 DI-1 19 OUT 2 GND OUT 1 DI-2 24 VAC DI-3 24 VAC COM GND 20 4 5 6 M29164 Fig. 9. Typical W7753A unit ventilator application wiring diagram with T7770F wall module. (For note 2, refer to Fig. 8.) 1 AI-4 V/mA 3 22 VDC OUT 2 1 GND OUTSIDE AIR CO SENSOR E GND BYPASS FAN LED NET 1 NET 2 SET PT SENSOR GND TR23-F5 WALL MODULE 21 TRIAC EQUIVALENT CIRCUIT W7753A UNIT VENTILATOR CONTROLLER J3 E-BUS 1 2 3 4 5 6 7 8 9 10 22 AI-3 V/mA 15 23 AI-2 OHM 14 24 GND 13 25 AI-1 OHM 12 26 SETPT 11 27 GND 10 28 SNSR 9 29 BYPASS 8 30 LED 22 VDC OUT 7 E-BUS 31 E-BUS JACK AI-4 V/mA 6 GND SETPT 5 AI-3 V/mA GND 4 AI-2 OHM SNSR 3 GND BYPASS 2 1 AI-1 OHM LED E GND W7753A UNIT VENTILATOR CONTROLLER DI-4 3 TRIAC EQUIVALENT CIRCUIT 7 8 9 10 11 12 13 E-BUS 14 15 E-BUS JACK DI-1 21 OUT 7 GND 22 OUT 8 DI-2 23 OUT 6 DI-3 24 OUT 5 DI-4 25 OUT 3 26 OUT 4 27 OUT 2 28 OUT 1 29 24 VAC COM 30 24 VAC 31 GND EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER J3 2 E-BUS 1 EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2) WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE. 2 TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK. 3 CONTACTS MUST BE SUITABLE FOR DRY SWITCHING, 5V AT 10 mA. USE SEALED TYPE, GOLD FLASHED OR PIMPLED CONTACTS. M12692 Fig. 10. Typical window and occupancy sensor wiring diagram. (For note 2, refer to Fig. 8.) 95-7520—02 6 DECREASE 18 17 OUT 7 16 OUT 8 19 OUT 6 20 OUT 5 21 OUT 3 OUT 1 22 OUT 4 23 OUT 2 24 24 VAC COM DI-1 25 24 VAC DI-2 GND DI-3 26 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER. 3 USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE MUST BE 6 FT. (1.8M) OR LONGER. 6 C7600C 7 8 9 10 11 12 13 E-BUS 14 15 J3 2 + E-BUS S HUMIDITY (4 TO 20mA) E-BUS JACK 5 22 VDC OUT OUT 2 2 4 AI-4 V/mA OUT 1 MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN; REVERSING TERMINATIONS RESULTS IN EQUIPMENT MALFUNCTION. 3 1 W7753A UNIT VENTILATOR CONTROLLER 1 2 1 GND 16 AI-3 V/mA 17 AI-2 OHM 18 GND 19 SETPT 20 TRIAC EQUIVALENT CIRCUIT AI-1 OHM 21 GND 22 SNSR 23 BYPASS 24 E GND 25 24 VAC 26 24 VAC COM 27 DI-1 DI-2 28 GROUND DI-3 DI-4 GROUND 29 27 LED INCREASE 24 (N) 24 (H) 24 (N) 24 (H) + - 30 28 W7753A UNIT VENTILATOR CONTROLLER 24 VAC 31 29 3 B PNEUMATIC VALVE 2 30 M M 1 31 DI-4 MMC325 PNEUMATIC TRANSDUCER GND EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER C7600C + S ENTHALPY (4 TO 20mA) 1 EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2) WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE. 2 TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED TOGETHER BEFORE INSERTIONINTO THE TERMINAL BLOCK. M12695 Fig. 12. Typical 4 to 20 mA Humidity and Enthalpy Sensor to W7753A. (For note 2, refer to Fig. 8.) M12693 Fig. 11. Typical Pneumatic Transducer to W7753A. 7 95-7520—02 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER 21 20 19 18 17 16 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 PWM OUTPUT FROM CNTRL 22 PWM (H 24 VAC) 23 24 (N) 24 24 (H) 25 OUT 1 26 24 VAC 27 24 VAC COM 28 DI-1 29 DI-2 DI-4 PWM VALVE ACTUATOR GND 30 ML7984B DI-3 31 GND + 24 VAC - C B T6 T5 W R 2 PWM VALVE ACTUATOR 3 1 2 3 4 ON 22 VDC OUT 7 8 9 10 11 12 13 OFF 4 CONFIGURATION DIP SWITCHES (LOCATED ADJACENT TO THE INPUT TERMINAL BLOCK) E-BUS JACK AI-4 V/mA 6 GND SETPT 5 AI-3 V/mA GND 4 AI-2 OHM SNSR 3 GND BYPASS 2 1 TRIAC EQUIVALENT CIRCUIT AI-1 OHM LED E GND W7753A UNIT VENTILATOR CONTROLLER E-BUS 14 15 J3 2 1 E-BUS 1 EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2) WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE. 2 TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK. 3 MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN:REVERSING TERMINATIONS WILL RESULT IN EQUIPMENT MALFUNCTION. 4 TURN POWER OFF BEFORE SETTING THE DIP SWITCHES. M12694 Fig. 13. Typical PWM Valve Actuator to W7753A. (For note 2, refer to Fig. 8.) NOTE: Make sure to set the Configuration DIP Switch as shown in Fig. 13. Switches 1 through 3 set the timing of the ML7984B valve actuator to match the W7753A outputs (0.1 sec. Min. with a max. time of 25.6 sec.). Switch 4 determines the action of the actuator (Off = Direct Acting, On = Reverse Acting). NOTE: All wiring must comply with applicable electrical codes and ordinances or as specified on installation wiring diagrams. 95-7520—02 8 GND OUT +V 1 17 16 AI-2 OHM AI-3 V/mA GND AI-4 V/mA 22 VDC OUT TRIAC EQUIVALENT CIRCUIT GND 6 18 OUT 7 DI-1 SETPT 5 C7600B 19 AI-1 OHM GND 4 20 OUT 8 GND SNSR 3 21 7 8 9 10 11 12 13 HUMIDITY SENSOR (2 TO 10 VOLT) E-BUS JACK DI-2 BYPASS 2 1 22 OUT 6 DI-3 23 W7753A UNIT VENTILATOR CONTROLLER LED Inspect all wiring connections at the W7753A terminals and verify compliance with installation job drawings. If any wiring changes are required, first be sure to remove power from the controller before starting work. Pay particular attention to: — 24 Vac power connections. Verify that multiple controllers powered by the same transformer are wired with the transformer secondary connected to the same input terminal numbers on each W7753A. See Fig. 5. (Controller configurations are not necessarily limited to three controllers, but the total power draw including accessories cannot exceed 100 VA when powered by the same transformer (U.S. only). See System Engineering, form 74-2964, for power wiring recommendations. — Controller wiring. Be sure that each controller is wired (terminal 1) on the W7753A to a verified earth ground using a wire run as short as possible with the heaviest gauge wire available, up to 14 AWG (2.0 mm2) with a minimum of 18 AWG (1.0 mm2) for each controller in the group. See Fig. 4. — Verify Triac wiring to external controllers uses the proper load power/24 Vac hot terminal (terminal 25 on the W7753A). E GND Step 1. Check Installation and Wiring 24 OUT 5 GND W7753A Checkout 25 OUT 3 26 OUT 4 27 OUT 2 28 OUT 1 29 24 VAC 30 24 VAC COM 31 DI-4 CHECKOUT E-BUS 14 15 J3 2 E-BUS 1 EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM2) WITH A MINIMUM OF 18 AWG (1.O MM2), FOR EARTH GROUND WIRE. 2 TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED TOGETHER BEFORE INSERTIONINTO THE TERMINAL BLOCK. M12696 Fig. 14. Typical 2 to 10 Volt DC humidity sensor to W7753A. (For note 2, refer to Fig. 8.) EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER Verify Termination Module Placement The installation wiring diagrams should indicate the locations for placement of 209541B Termination Module(s). Refer to the E-Bus Wiring Guidelines, form 74-2865, and the Excel 10 FTT Termination Module Installation Instructions, form 95-7554. Correct placement of the termination module(s) is required for proper E-Bus communications. Step 2. Startup W7753A CONTROLLER STATUS LED The LED on the front and center of a W7753A Controller provides a visual indication of the status of the controller. See Fig. 15. When the W7753A receives power, the LED should appear in one of the following allowable states: 1. 2. 3. 4. Off—no power to the processor. Continuous On—processor is in initialized state. Slow Blink—controlling, normal state. Fast Blink—when the Excel 10 has an alarm condition. W7753A • Node Number: This is the Excel 10 node that has the alarm condition (see Network Statics). Alarm Type: The specific alarm being issued. An Excel 10 can provide the alarm types listed in Table 1. Broadcasting the Service Message The Service Message allows a device on the E-Bus to be positively identified. The Service Message contains the controller ID number and, therefore, can be used to confirm the physical location of a particular Excel 10 in a building. There is one method of broadcasting the Service Message from an Excel 10 W7753A Controller. This uses a hardware push button on the side of the controller (see Fig. 16). When an Assign ID command is issued from the commissioning tool, the node goes into the SERVICE_MESSAGE mode for five minutes. In the SERVICE_MESSAGE mode, pressing the service pin on the controller or the bypass button on a wall module causes the Service Message to be broadcast on the network. All other functions are normal in the SERVICE_MESSAGE mode. Step 3. I/O Tests 31 30 29 28 27 26 The controller must be configured using the Excel 10 E-Vision PC configuration tool. Once this is done, the W7753A can be commanded to MANUAL mode, and each output can be exercised/viewed to verify proper wiring connections and equipment operation. See the Excel 10 E-Vision Users Guide, form 74-2588 for details on configuring and testing W7753A Controllers. 25 24 23 22 21 20 19 24 DI-4 GND 18 17 DI-3 DI-2 GN 16 2 D DI-1 24 VAC 1 3 4 VAC COM OU 5 6 T OUT OUT 7 8 OUT OUT OU T OUT OUT SERVICE PIN BUTTON E LED BYP ASS SNSR GND GND SET PT AI-1 1 2 3 4 5 OHM 6 7 GND A1-2 AI-3 GND AI-4 22VDC OHM V/mA V/mA OUT 8 9 10 E-BUS 11 12 13 14 15 E-BUS JACK J3 STATUS LED M12697 Fig. 15. LED location on W7753A. ALARMS When an Excel 10 has an alarm condition, it reports it to the central node on the E-Bus (typically, the Excel 10 Zone Manager, or Small Building Controller). See Table 1. The information contained in an alarm message follows: • Subnet Number: This is the E-Bus subnet that contains the Excel 10 node that has the alarm condition. Subnet 1 is on the Zone Manager side of the router; Subnet 2 is on the other side of the router. 9 M10094 Fig. 16. Location of the service pin button. Step 4. Verify Sequences of Operation For the detailed descriptions of the sequences of operation, see the Excel 10 Unit Ventilator System Engineering, form 74-2964 Appendix B. 95-7520—02 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER Table 1. Excel 10 Alarms. Name of alarm or error bit Alarm type number NO_ALARM 0 No alarms presently detected. INPUT_NV_FAILURE 1 One or more NV inputs have failed while receiving an update within their specified FAILURE_DETECT_TIME. NODE_DISABLED 2 The control algorithm stopped because the controller is in DISABLED_MODE, or FACTORY_TEST mode. The control is shut down and disabled until power is cycled or the node is reset. See NOTE 1 below. SENSOR_FAILURE 3 One or more sensors have failed. FROST_PROTECTION_ALARM 4 The space temperature is below the frost alarm limit 42.8°F (6°C) when the mode is FREEZE_PROTECT. The alarm condition remains until the temperature exceeds the alarm limit plus hysteresis. INVALID_SET_POINT 5 One of the Setpoints is not in the valid range. LOSS_OF_AIR_FLOW 6 The Fan Status DI indicates that there is no air flow when the node is commanding the fan to run. The control is shut down and disabled until power is cycled or the node is reset. The alarm is not issued until FanFailTime seconds have elapsed since the loss-of-flow condition was first reported. DIRTY_FILTER 7 The pressure drop across the filter exceeds the limit and the filter requires maintenance. The control runs normally. SMOKE_ALARM 8 The smoke detector has detected smoke and the node has entered an emergency state. IAQ_OVERRIDE 9 The indoor air quality sensor has detected that the indoor air quality is poorer than the desired standard and additional outdoor air is being brought into the conditioned space. LOW_LIM_ECON_CLOSE 10 The economizer has to close beyond the minimum position to prevent the discharge air temperature from going below the discharge temperature low limit. DRIP_PAN_FULL 11 Drip pan maintenance is required. Cooling control is disabled. Fan continues to run. FREEZE_STAT 12 Very Cold Temperature detected inside the Unit Ventilator Cabinet. Control closes OA Damper, and open heat valve. OAQ_ALARM 13 The configured outdoor air quality sensor has detected CO or CO2 levels that exceeds OaQStPt (plus 30 ppm hysteresis). When there is an OAQ_ALARM, the economizer damper is closed. RETURN_TO_NORMAL 128 Return to no alarm after being in an alarm condition. This code is added numerically to another alarm code to indicate that the alarm condition has returned to normal. ALARM_NOTIFY_DISABLED 255 The alarm reporting was turned off by the nviManualMode. No more alarms are reported until nviManualMode turns on alarm reporting or upon application restart. NOTE: The node can be reset by switching the node to MANUAL and then switching to the normal operating mode (using DestManMode). Also, the Excel 10 network variables, AlarmLogX, where X is 1 through 5, that store the last five alarms to occur in the controller, are available. These points can be viewed through XBS, XI584 or E-Vision. 95-7520—02 10 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER 11 95-7520—02 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9 Honeywell GmbH Böblinger Straße 17 D-71101 Schönaich customer.honeywell.com ® U.S. Registered Trademark © 2009 Honeywell International Inc. 95-7520—02 K.K. Rev. 03-09