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.