Aprilaire 8840 - Connect Thermostat to Home Wi-Fi

8 9
HVAC WIRING DIAGRAMS
CONVENTIONAL HEAT/COOL SINGLE TRANSFORMER (USE JUMPER)
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 COOLING
2nd COOLING
2
1
3rd HEATING
3nd COOLING
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 COOLING
1st COOLING
FAN
1
st
HEATING
2nd HEATING
3rd HEATING
3rd COOLING
1
R and C can be
powered from the
HVAC equipment
transformer or any
other constantly
powered 24VAC
source.
1
HVAC WIRING DIAGRAMS
HEAT PUMP SINGLE TRANSFORMER (USE JUMPER WIRE)
C
R
W
W2
B
Y
Y2
O
G
L
RH
RC
C
3
EQ
HPHC
G
Y3
Y2
Y
W3
W2
W
FAULT DETECT
REVERSING VALVE
THERMOSTAT
REVERSING VALVE
1
2
2nd COMPRESSOR
1st COMPRESSOR
FAN
1st HEATING
2nd HEATING
HEAT PUMP TRANSFORMER
HEAT PUMP TWO TRANSFORMER (REMOVE JUMPER WIRE)
THERMOSTAT
TRANSFORMER
W
W2
W3
Y
Y2
Y3
G
HC HP
EQ
3
C
RC
RH
L
G
O
Y2
Y
B
W2
W
R
C
HEAT PUMP TRANSFORMER
HEATING TRANSFORMER
1
FAULT DETECT
REVERSING VALVE
REVERSING VALVE
2nd HEATING
1st HEATING
FAN
1
st COMPRESSOR
2nd COMPRESSOR
2
1
1
R and C can be
powered from the
HVAC equipment
transformer or any
other constantly
powered 24VAC
source.