3
Typical Wiring Configurations
NOTE: The “Installer Switch” option will be configured in the next step.
Heat Pump Systems
1 HEAT / 1 COOL - No Auxiliary Heat
Set Installer Switch to HP
Rh 24 Volt AC Power
Rc Connected to Rh with supplied Jumper Wire
O or B
Changeover Valve [note 2]
Y1 Compressor Relay
G Fan Relay
C 24 Volt AC Transformer Common [note 1]
2 HEAT / 1 COOL - Including Auxiliary Heat
(
PRS3210 Only)
Set Installer Switch to HP
Rh 24 Volt AC Power
Rc Connected to Rh with supplied Jumper Wire
O or B
Changeover Valve [note 2]
Y1
Compressor Relay (1st stage heating/cooling)
W2 Auxiliary Heat Relay (2nd stage heating) [note 3]
W1/E Emergency Heat Relay [note 3]
G Fan Relay
C 24 Volt AC Transformer Common [note1]
NOTES - Heat Pump Systems
[1] If batteries are installed the 24 Volt AC common connection is optional.
[2] Select O for cool active or B for heat active.
[3] Install a field supplied jumper between the W2 and E terminals if
there is no separate emergency heat relay installed.
Provide disconnect and overload protection as required.
Factory Setting
Switch Default Options Comments
CONV / HP CONV
F / C F
HE / HG HG
Set Installer Switches
4
CONV Select for conventional systems
HP Select for heat pump systems
F Select for fahrenheit temperature scale
C Select for celsius temperature scale
HG Select for gas heat
HE Select for electric heat
NOTE: The reset button should be pressed after making any changes to the
installer switches.
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