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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
39 74-2958—1
Fig. 29. W7750A Controller floating economizer damper
wiring diagram. (For more information on note 2, refer to
Fig. 25.)
NOTE: Di
g
ital outputs are confi
g
urable. The terminal
locations for each function are user-selectable. The
Network DO is confi
g
ured to be economizer float
close in this fi
g
ure and W2 is confi
g
ured to be
economizer float open. Ph
y
sical output terminal
features are done in E-Vision b
y
the custom wirin
g
function.
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W7750A
CONSTANT
VOLUME AHU
CONTROLLER
1
2
2
1
2
3
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, WIRES MUST BE TWISTED
TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK.
LOAD POWER WIRE CAN BE CONNECTED TO TERMINAL 22.
LONWORKS-BUS
EARTH
GROUND
JACK FOR
L
ONWORKS-BUS
NETWORK
ACCESS
7 69 8 54321
T7770C
WALL
MODULE
SET PT
GND
SENSOR
BYPASS
LED
E-BUS
E-BUS
9 101112 14 J315
31 30 29 28 27 26 25 24 23 22 21 20
WALL MODULE
SET PT
SENSOR
BYPASS
LED
NOT USED
19 18 17 16
AI-1 OHM
DI- 1
DI- 2
13
TIME CLOCK
M10083C
DISCHARGE
AIR TEMP
24 VAC
24 VAC COM
Rc
Rh
NETWORK
DO
W1
W2
Y1
Y2
G
24 VAC
+
-
3
LOAD AND
CONTROLLER
POWER
NOT USED
ML6161 FLOATING
ACTUATOR
CW COM CCW
HEAT 1
AI
GROUND
AI
GROUND
DI
GROUND
DI
GROUND
LON
JACK
L
ONWORKS
BUS