Assessments - 2, GPA: 5
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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. TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK. CONTACTS MUST BE SUITABLE FOR DRY SWITCHING, 5V AT 10 mA. USE SEALED TYPE, GOLD FLASHED OR PIMPLED CONTACTS. E-BUS E GNDGNDSNSRSETPTLEDBYPASSGNDGND 9 10 11 12 14 J3 15 31 30 29 28 27 26 25 24 23 22 21 20 24 VAC COM E-BUSJACK22 VDC OUT 19 18 17 16 AI-1 OHMAI-2 OHMAI-4 V/mA OUT 7 OUT 6 OUT 5 OUT 4OUT 8 OUT 1OUT 3 OUT 2AI-3 V/mA 13 M12692 DI-2DI-4DI-1DI-3 OCCUPANCY SENSOR (CONTACT CLOSED = OCCUPIED) GNDGND TRIAC EQUIVALENT CIRCUIT 24 VAC + - Fig. 10. Typical window and occupancy sensor wiringdiagram. (For note 2, refer to Fig. 8.) 95-7520—02 6 TRANSDUCER OUT 1 OUT 2OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 MMC325 PNEUMATIC M 19 18 17 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER W7753A UNIT VENTILATOR CONTROLLER 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. 1 1 MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN; REVERSING TERMINATIONS RESULTS IN EQUIPMENT 2 TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED MALFUNCTION. M12695 TOGETHER BEFORE INSERTIONINTO THE TERMINAL BLOCK. 2 3 OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER. Fig. 12. Typical 4 to 20 mA Humidity and Enthalpy SensorUSE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE to W7753A. (For note 2, refer to Fig. 8.) MUST BE 6 FT. (1.8M) OR LONGER. M12693 Fig. 11. Typical Pneumatic Transducer to W7753A. 24 VAC 24 (H)24 (N)24 (H)24 (N)INCREASEDECREASE 24 VAC 31 30 29 28 27 26 25 24 23 22 21 20 24 VAC COM 19 18 17 16 + - 3 21 OUT 7 OUT 6 OUT 5 OUT 4OUT 8 OUT 1OUT 3 OUT 2 DI-2DI-4DI-1DI-3GROUND PNEUMATIC VALVE GROUND M B 1 2 E-BUS 13 C7600C + S C7600C + S ENTHALPY (4 TO 20mA) HUMIDITY (4 TO 20mA) DI-4 GND DI- 3 DI- 2 GND DI-1 AI-1 OHM TRIAC EQUIVALENT CIRCUIT AI-2 OHM AI-3 V/mA AI-4 V/mA 22 VDC OUT E-BUS OUT 8 JACK 7 95-7520—02 EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER 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). CHECKOUT 1 2 3 4 5 6 7 8 E-BUS 24 VAC 1 2 E-BUS E GNDGNDSNSRSETPTLEDBYPASSGNDGND 9 10 11 12 14 J3 15 31 30 29 28 27 26 25 24 23 22 21 20 24 VAC COM E-BUSJACK22 VDC OUT 19 18 17 16 AI-1 OHMAI-2 OHMAI-4 V/mA OUT 7 OUT 6 OUT 5 OUT 4OUT 8 OUT 1OUT 3 OUT 2AI-3 V/mA 13 DI-2DI-4DI-1DI-3 M12694 GNDGND TRIAC EQUIVALENT CIRCUIT 24 VAC + - 2 1 2 3 3 4 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. TO ASSURE PROPER ELECTRICAL CONTACT, WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK. MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN:REVERSING TERMINATIONS WILL RESULT IN EQUIPMENT MALFUNCTION. TURN POWER OFF BEFORE SETTING THE DIP SWITCHES. 12 34 4 24 (H)24 (N)PWM(H 24 VAC)PWM OUTPUTFROM CNTRL PWM VALVE ACTUATOR PWM VALVE ACTUATOR ML7984B T6 T5 C B W R ON OFF CONFIGURATION DIP SWITCHES (LOCATED ADJACENT TO THE INPUT TERMINAL BLOCK) W7753A UNIT VENTILATOR CONTROLLER W7753A Checkout Step 1. Check Installation and Wiring 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). NOTE: All wiring must comply with applicable electrical codes and ordinances or as specified on installation wiring diagrams. 1 2 3 4 5 6 7 8 E-BUS 24 VAC W7753A UNIT VENTILATOR CONTROLLER 1 E-BUS E GNDGND GNDOUT+V SNSRSETPTLEDBYPASSGNDGND 9 10 11 12 14 J3 15 31 30 29 28 27 26 25 24 23 22 21 20 24 VAC COM E-BUSJACK22 VDC OUT 19 18 17 16 AI-...
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