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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER
7 95-7520—02
Fig. 11. Typical Pneumatic Transducer to W7753A.
Fig. 12. Typical 4 to 20 mA Humidity and Enthalpy Sensor
to W7753A. (For note 2, refer to Fig. 8.)
24 VAC
24 (H)
24 (N)
24 (H)
24 (N)
INCREASE
DECREASE
24 VAC
W7753A UNIT
VENTILATOR
CONTROLLER
MMC325 PNEUMATIC
TRANSDUCER
1
2
3
MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN;
REVERSING TERMINATIONS RESULTS IN EQUIPMENT
MALFUNCTION.
OPTIONAL 24 VAC WIRING TO NEXT CONTROLLER.
USE 1/4 IN (6 MM) PNEUMATIC TUBING. MINIMUM BRANCH LINE
MUST BE 6 FT. (1.8M) OR LONGER.
31 30 29 28 27 26 25 24 23 22 21 20
24 VAC COM
19 18 17 16
+
-
3
2
1
OUT 7
OUT 6
OUT 5
OUT 4
OUT 8
OUT 1
OUT 3
OUT 2
DI-2
DI-4
DI-1
DI-3
GROUND
PNEUMATIC
VALVE
M12693
GROUND
M
B
M
12345678
E-BUS
24 VAC
W7753A
UNIT
VENTILATOR
CONTROLLER
1
2
E-BUS
E GND
GND
SNSR
SETPT
LED
BYPASS
GND
GND
9101112 14 J315
31 30 29 28 27 26 25 24 23 22 21 20
24 VAC COM
E-BUS
JACK
22 VDC OUT
19 18 17 16
AI-1 OHM
AI-2 OHM
AI-4 V/mA
OUT 7
OUT 6
OUT 5
OUT 4
OUT 8
OUT 1
OUT 3
OUT 2
AI-3 V/mA
13
DI-2
DI-4
DI-1
DI-3
M12695
GND
GND
TRIAC EQUIVALENT CIRCUIT
C7600C
1
2
EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM. USE
THE HEAVIEST GAUGE WIRE AVAILABLE, UP TO 14 AWG (2.O MM
2
) WITH
A MINIMUM OF 18 AWG (1.O MM
2
), FOR EARTH GROUND WIRE.
TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED
TOGETHER BEFORE INSERTIONINTO THE TERMINAL BLOCK.
+
S
C7600C
+
S
ENTHALPY
(4 TO 20mA)
HUMIDITY
(4 TO 20mA)