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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
41 74-2958—1
Fig. 32. W7750B,C Controller PWM damper actuator
wiring diagram. (For more information on note 2, refer to
Fig. 25.)
Fig. 33. W7750B,C wiring diagram with 4 to 20 mA
enthalpy sensors and digital inputs. (For more
information on note 2, refer to Fig. 25.)
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24 VAC
W7750B CONSTANT
VOLUME AHU
CONTROLLER
1
2
2
1
2
3
4
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.
WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT
HIGH-SIDE POSITION.
FOR WIRING DETAILS FOR PWM DEVICES, REFER TO DOCUMENTATION
INCLUDED WITH PWM DEVICES.
EARTH
GROUND
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
24 VAC COM
WALL MODULE
SET PT
GROUND
SENSOR
BYPASS
LED
20 VDC OUT
19 18 17 16
AI-1 OHM
GROUND
GROUND
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
DI
GROUND
M10080C
DI
GROUND
TRIAC EQUIVALENT CIRCUIT
DISCHARGE
AIR TEMP
24 VAC
+
-
4
PWM ACTUATOR
24V COM 24V
ECONOMIZER
DAMPER
POWER
SIGNAL
SIG
LONWORKS
BUS
L
ON
JACK
L
ONWORKS-BUS
JACK FOR
L
ONWORKS-BUS
NETWORK
ACCESS
3
12345678
24 VAC
24 VAC
W7750B 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.
WIRING DIAGRAM SHOWS JUMPER (FOR J2) IN FACTORY DEFAULT
HIGH-SIDE POSITION.
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
24 VAC COM
WALL MODULE
SET PT
SENSOR
BYPASS
LED
20 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
OCCUPANCY SENSOR
(CONTACTS CLOSED
EQUALS OCCUPIED)
WINDOWS CONTACTS
(CONTACTS CLOSED
EQUALS WINDOW
CLOSED)
M10079C
TRIAC EQUIVALENT CIRCUIT
DISCHARGE
AIR TEMP
OUTDOOR
ENTHALPY RETURN
ENTHALPY
3
DI
GROUND
DI
GROUND
AI
GROUND
AI
GROUND
AI
GROUND
LON
JACK
L
ONWORKS
BUS