Mounting The Outdoor Temperature Sensor; Wiring - Aprilaire 8120 Series Installation And Operation Manual

MOUNTING THE OUTDOOR TEMPERATURE SENSOR

1. Drill a 3/8" diameter hole in the duct of the fresh air inlet hood .
2. Install the outdoor temperature sensor into the duct and use metal foil tap to secure it in place
and seal the opening . Run the wire toward the outside wall .
3. Secure ductwork to the inlet hood duct while allowing the wire of the sensor to extend outside
of the insulation . Tape and/or mastic the duct as needed and properly insulate .
1
3/8" DIA
HOLE
2
FRESH AIR
INLET HOOD
90-2265
8 English
USE METAL FOIL
TAPE TO SECURE
SENSOR TO DUCT 3
INSULATED
FLEX DUCT
OUTDOOR
TEMPERATURE
SENSOR
ENSURE PROPER
SEAL TO PREVENT
CONDENSATION

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 Fresh Air Ventilator and wire according to FIGURE 3 (Model 8140NC or Model 8145NC),
FIGURE 4 (Model 8142NC), FIGURE 5 (Model 8144NC) or FIGURE 6 (damper) .
FIGURE 1 – WIRING TO FURNACE
THERMOSTAT OR ZONE PANEL
R C Y W G
WIRE NUT
(FIELD
SUPPLIED)
R C Y W G
R & C = 24 VAC
FURNACE
Y = COOLING
W = HEAT
GS = FAN INPUT
GH = FAN OUTPUT
MODEL 8120X DIGITAL VENTILATION CONTROL
R
ODT
C
Y
W
O
GS
VENT
GH
OUTDOOR
TEMPERATURE
SENSOR
English 9