Aprilaire 8120 Series - WIRING TO HEAT PUMP; WIRING TO MODEL 8140 NC OR 8145 NC FRESH AIR VENTILATOR

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MODEL 8120X DIGITAL VENTILATION CONTROL
R
C
Y
W1
G
R
C
Y
W
G
HEAT PUMP THERMOSTAT
OR ZONE PANEL
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 OR
8145NC VENTILATOR
VENT
VENT
FIGURE 2 – WIRING TO HEAT PUMP
FIGURE 3 – WIRING TO MODEL 8140NC OR 8145NC FRESH AIR VENTILATOR
R
C
Y
W
O
Gs
Gh
VENT
O DT
MODEL 8120X DIGITAL VENTILATION CONTROLLER*
24 VAC
VENT
FIGURE 4 – WIRING TO MODEL 8142NC FRESH AIR VENTILATOR
* Outdoor Temperature is supplied
with the control and is required
for optimum ventilation control.
N
L
120 VAC
CON3
CON2
CON1
8144NC CIRCUIT BOARD
MODEL 8120X DIGITAL VENTILATION CONTROL
R
C
Y
W
O
Gs
Gh
VENT
ODT
FIGURE 5 – WIRING TO MODEL
8144NC FRESH AIR VENTILATOR