Aprilaire 8910 Thermostat User Manual


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4 5
INSTALLATION INSTALLATION
EQUIPMENT CONTROL MODULE WIRING
Wire specifications:
18-24 gauge thermostat wire
Installation notes:
 
 
and re-tighten.
 
channels.
1 – Connection to terminal 1 at thermostat
2 – Connection to terminal 2 at thermostat
3 – Connection to terminal 3 at thermostat
RAT – Return air temperature sensor (optional)
LAT – Leaving air temperature sensor (optional)
ODT – Outdoor temperature sensor (optional)
C – 24VAC common
R – 24VAC
RC – 24VAC Cooling
RH – 24VAC Heating
W
W2
pump)
W3/B – Third stage heat (conventional)/reversing valve
(heat pump)
Y – First stage cooling (conventional)/first stage compressor
(heat pump)
Y2 – Second stage cooling (conventional)/second stage
compressor (heat pump).
Y3/0 – Third stage cooling (conventional)/reversing valve
(heat pump)
G – Fan
L – System fault indicator (heat pump only) (optional)
C
EQ – 24VAC common from heat pump for system fault
indicator (optional)
HUM – Humidifier
DHno & DHcom
DHnc & DHcom
VENT – Ventilation
EAC – Electronic Air Cleaner
OUTDOOR TEMPERATURE SENSOR
OPTIONAL WIRELESS OUTDOOR TEMPERATURE SENSOR
Outdoor temperature can be measured by installing an 8052 sensor (included) to the ODT terminals and enabling the

In heat pump mode the outdoor temperature sensor can be used to efficiently utilize an air source heat pump:



only the heat pump will be used to provide heating.
Indoor Air Quality functions can use the outdoor temperature sensor to:




Outdoor temperature sensor should
be mounted:

(north side recommended).


condensing lines.





Instructions for detailed directions regarding installation.
Outdoor Sensor
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