Return Air Temperature Sensor (Optional); Leaving Air Temperature Sensor (Optional) - Aprilaire Home Comfort Control 8910 Safety & Installation Instructions

InsTallaTIon

ReTuRn aIR TeMPeRaTuRe sensoR (oPTIonal)

Return air temperature can be measured by attaching an 8052 sensor to the RAT terminals . The return sensor must
be enabled in the installer set-up menu . The return air temperature sensor provides protection in the event that the
equipment control module loses connection with the thermostat. In the event that the thermostat connection is lost,
the equipment control module will use the return air temperature sensor to maintain a temperature greater than 40°F
and less than 100°F .
1 . Locate the Aprilaire Model 8052 sensor
in the return trunk .
2 . Mount the sensor according to the
installation instructions provided with
the sensor .
3 . Wire the sensor to the equipment
control module RAT terminals .

leaVIng aIR TeMPeRaTuRe sensoR (oPTIonal)

Leaving air temperature can be measured by attaching an 8052 sensor to the LAT terminals . The leaving air
temperature sensor measurement is displayed during the installer test for diagnostic purposes .
IMPoRTanT
Do not mount the sensor in direct line-of-sight of the heat exchanger, cooling coils, or UV lights as this may cause
the sensor to report false temperature readings .
1. L ocate the Aprilaire Model 8052 sensor in the supply trunk, after the heat exchanger and cooling coils. (See
shaded areas in figure below .)
2 . Mount the sensor according to the installation instructions provided with the sensor .
3 . Wire the sensor to the equipment control module LAT terminals .
LOCATE
SENSOR
IN SHADED
AREA .
6
HVaC WIRIng DIagRaMs
ConVenTIonal HeaT/Cool sIngle TRansfoRMeR (use JuMPeR)
1
THERMOSTAT
2
3
ConVenTIonal HeaT/Cool TWo TRansfoRMeR (ReMoVe JuMPeR)
1
THERMOSTAT
2
3
1 R and C can be
powered from the
HVAC equipment
transformer or any
other constantly
powered 24VAC
source.
C
TRANSFORMER
R
RC
RH
HC HP
W W 1 HEATING
st
W2 W2 2 HEATING
nd
W3 B 3 HEATING
rd
Y Y 1 COMPRESSOR
st
Y2 Y2 2 COMPRESSOR
nd
Y3 O
3 COMPRESSOR
nd
G G FAN
L
C
EQ
1
TRANSFORMER
C
R
COOLING TRANSFORMER
RC
RH
HEATING TRANSFORMER
HC HP
W W 1 HEATING
st
W2 W2 2 HEATING
nd
W3 B
Y Y
1 COMPRESSOR
st
Y2 Y2
2 COMPRESSOR
nd
Y3 O
3 COMPRESSOR
rd
G G FAN
L
C
EQ
7