TH7000 Series
5
69-2668—03
Shaded areas below apply only to
TH7220
.
Wiring guide—heat pump systems
Wiring
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]
Heat pump reset (powered continuously when thermostat is set to Em. Heat; system monitor when
set to Heat, Cool, or Off).
[8]
Install field jumper between
Aux
and
E
terminals if there is no emergency heat relay.
1H/1C Heat Pump (no auxiliary heat)
Rc
Power
[1]
R
[R+Rc joined by jumper]
O/B
Changeover valve
[5]
Y
Compressor relay
G
Fan relay
C
24VAC common
[3]
S1
Optional outdoor/remote sensor
S2
Optional outdoor/remote sensor
2H/1C Heat Pump (with auxiliary heat)
L
Equipment monitor
[6, 7]
E
Emergency heat relay
[8]
Aux
Auxiliary heat relay (Heat 2)
[8]
Rc
Power
[1]
R
[R+Rc joined by jumper]
O/B
Changeover valve
[5]
Y
Compressor relay
G
Fan relay
C
24VAC common
[3]
S1
Optional outdoor/remote sensor
S2
Optional outdoor/remote sensor
M27518
M27519
Remove tab.
Align pins on back of thermostat with
slots in wallplate, then push gently until
thermostat snaps into place.
Remove tab and mount thermostat
