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MMC325 PNEUMATIC
TRANSDUCER
1
2
31
30
29
28
27
26
25
24
W7753A UNIT
VENTILATOR
CONTROLLER
1
MAKE SURE ALL TRANSFORMER/POWER WIRING IS AS SHOWN;
REVERSING TERMINATIONS RESULTS IN EQUIPMENT
MALFUNCTION.
2
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.
Fig. 11. Typical Pneumatic Transducer to W7753A.
M
M
3
B
PNEUMATIC
VALVE
+
24 VAC
-
23
22
21
20
19
18
17
16
M12693
EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER
31
30
29
28
27
W7753A
UNIT
VENTILATOR
CONTROLLER
1
2
3
4
5
1
C7600C
HUMIDITY
(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 MM
A MINIMUM OF 18 AWG (1.O MM
2
TO ASSURE PROPER ELECTRICAL CONTACT, WIRESMUST BE TWISTED
TOGETHER BEFORE INSERTIONINTO THE TERMINAL BLOCK.
Fig. 12. Typical 4 to 20 mA Humidity and Enthalpy Sensor
to W7753A. (For note 2, refer to Fig. 8.)
7
26
25
24
23
22
21
20
19
TRIAC EQUIVALENT CIRCUIT
6
7
8
9
10
11
12
13
+
S
+
C7600C
S
ENTHALPY
(4 TO 20mA)
2
), FOR EARTH GROUND WIRE.
18
17
16
E-BUS
14
15
J3
2
E-BUS
2
) WITH
M12695
95-7520—02
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