11
10
WIRING
Disconnect power to the HVAC system to prevent electrical shorts while wiring .
1.
Run a 2-conductor cable from the control to the outdoor temperature sensor (if installed) and
wire to the controller ODT terminals .
2.
Run an 8-conductor thermostat cable from the control to the HVAC equipment . Wire the
controller to the HVAC equipment in accordance with
FIGURE 1
or
FIGURE 2
diagram below .
Contact customer service if wiring assistance is needed for other equipment configurations .
3.
Run a 2-conductor cable from the control to either the damper in Model 8126X installations or
to the Model 8140NC Fresh Air Ventilator and wire according to
FIGURE 3
or
FIGURE 4
.
MODEL 8120X DIGITAL VENTILATION CONTROL
R
C
Y
W
G
R
C
Y
W
G
THERMOSTAT
WIRE NUT
(FIELD
SUPPLIED)
R
C
Y
W
O
GS
GH
FURNACE
R & C = 24 VAC
Y = COOLING
W = HEAT
GS = FAN INPUT
GH = FAN OUTPUT
VENT
ODT
OUTDOOR
TEMPERATURE
SENSOR
FIGURE 1
– WIRING TO FURNACE
MODEL 8120X DIGITAL VENTILATION CONTROL
R C Y W1
G
R C Y W
G
HEAT PUMP THERMOSTAT
WIRE NUT
(FIELD
SUPPLIED)
O
R & C = 24 VAC
Y = COMPRESSOR
W1 = 1st STAGE AUX. HEAT
O = REV. VALVE, COOLING
GS = FAN INPUT
GH = FAN OUTPUT
R
C
Y
W
O
GS
GH
VENT
ODT
HEAT PUMP
O
OUTDOOR
TEMPERATURE
SENSOR
MODEL 8140NC
VENTILATOR
VENT
VENT
FIGURE 2
– WIRING TO HEAT PUMP
FIGURE 3
– WIRING TO MODEL 8140NC FRESH AIR VENTILATOR