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INSTALLATION HVAC WIRING DIAGRAMS
LEAVING AIR TEMPERATURE SENSOR (OPTIONAL)
CONVENTIONAL HEAT/COOL SINGLE TRANSFORMER (USE JUMPER)
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
the sensor to report false temperature readings.
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.
W
W2
W3
Y
Y2
Y3
G
HC HP
EQ
3
C
RC
RH
L
G
O
Y2
Y
B
W2
W
R
C
TRANSFORMER
2nd HEATING
1st HEATING
THERMOSTAT
FAN
1
st COMPRESSOR
2nd COMPRESSOR
2
1
3rd HEATING
3nd COMPRESSOR
LOCATE
AREA.
CONVENTIONAL HEAT/COOL TWO TRANSFORMER (REMOVE JUMPER)
HEATING TRANSFORMER
COOLING TRANSFORMER
C
R
W
W2
B
Y
Y2
O
G
L
RH
RC
C
3
EQ
HPHC
G
Y3
Y2
Y
W3
W2
W
TRANSFORMER
THERMOSTAT
1
2
2nd COMPRESSOR
1st COMPRESSOR
FAN
1st HEATING
2nd HEATING
3rd COMPRESSOR
1
R and C can be
powered from the
HVAC equipment
transformer or any
other constantly
powered 24VAC
source.
1
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
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.