Heat Pump Systems - Braeburn 2020NC Detailed Installer Manual

Heat Pump Systems

Typical Wiring Configurations
NOTE: The "Installer Switch" option will be configured in the next step.
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 (2220NC 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]
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.
Set Installer Switches
4
The Installer switches are located on the back of the thermostat and must
be properly configured for this thermostat to operate properly.
Switch
CONV / HP
F / C
HE / HG
Factory Setting
Default Options Comments
CONV
CONV
HP
F
F
C
HG
HG
HE
Select for conventional systems
Select for heat pump systems
Select for fahrenheit temperature scale
Select for celsius temperature scale
Select for gas heat
Select for electric heat
5