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17 69-2091EFS—07
System-specific wiring guides
Heat pump systems
See [
notes
] below.
1H/1C Heat Pump
[
8
]
C
24VAC common
R
Power [
1
]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
O/B
Changeover valve [
7
]
Y
Compressor contactor
G
Fan relay
2H/1C Heat Pump
[
9
]
C
24VAC common
R
Power [
1
]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
O/B
Changeover valve [
7
]
Aux
Auxiliary heat relay
Y
Compressor contactor
G
Fan relay
L
Relay [
12
]
2H/2C Heat Pump
[
10
]
C
24VAC common
R
Power [
1
]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
O/B
Changeover valve [
7
]
Y
Compressor contactor (stage 1)
Y2
Compressor contactor (stage 2)
G
Fan relay
3H/2C Heat Pump
[
11
]
C
24VAC common
R
Power [
1
]
Rc
[R+Rc+Rh joined by jumper]
Rh
[R+Rc+Rh joined by jumper]
O/B
Changeover valve [
7
]
Aux
Auxiliary heat relay
Y
Compressor contactor (stage 1)
Y2
Compressor contactor (stage 2)
G
Fan relay
L
Relay [
12
]
[
1
]
Power supply. Provide disconnect means and overload protection as required.
[
2
]
Remove jumper (Rc to Rh) for systems with two transformers.
[
3
]
In Installer Setup, set system type to
Heat Only
.
[
4
]
In Installer Setup, set system type to
Heat Only with Fan
.
[
5
]
In Installer Setup, set system type to
Cool Only
.
[
6
]
In Installer Setup, set system type to 2 Heat/2 Cool Conventional.
[
7
]
In Installer Setup, set changeover valve to
O
or
B
.
[
8
]
In Installer Setup, set system type to
1 Heat/1 Cool Heat Pump
.
[
9
]
In Installer Setup, set system type to
2 Heat/1 Cool Heat Pump
.
[
10
]
In Installer Setup, set system type to
2 Heat/2 Cool Heat Pump
.
[
11
]
In Installer Setup, set system type to
3 Heat/2 Cool Heat Pump
.
[
12
]
“L” terminal sends a continuous output when thermostat is set to Em. Heat. Connect
to zoning panel and switch to Emergency Heat.
