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Wiring
Shaded areas below apply only to TH7220.
1H/1C Heat Pump (no auxiliary heat)
Rc
Power
[1]
R
[R+Rc joined by jumper]
O/B
Changeover valve
Y
Compressor relay
G
Fan relay
C
24VAC common
S1
Optional outdoor/remote sensor
S2
Optional outdoor/remote sensor
See [notes] below
[1]
Power supply. Provide disconnect means and overload protection as required.
[3]
Optional 24VAC common connection.
[5]
O/B set to control as either O or B in installer setup.
[6]
If L terminal is used, 24VAC common (terminal C) must be connected.
[7]
Install field jumper between Aux and E terminals if there is no emergency heat relay.
Remove tab and mount thermostat
Remove tab.
Align pins on back of thermostat with
slots in wallplate, then push gently
until thermostat snaps into place.
Wiring guide—heat pump systems
[5]
[3]
M27518
2H/1C Heat Pump (with auxiliary heat)
L
System monitor
E
Emergency heat relay
Aux
Auxiliary heat relay (Heat 2)
Rc
Power
R
[R+Rc joined by jumper]
O/B
Changeover valve
Y
Compressor relay
G
Fan relay
C
24VAC common
S1
Optional outdoor/remote sensor
S2
Optional outdoor/remote sensor
5
TH7000 Series
[6]
[7]
[1]
[5]
[3]
69-2668ES—05
[7]
M27519
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