Braeburn 1020NC Installation Manual page 4

3
Connect Your Wires
Wiring Terminations
Terminal
Rc Input
Rh Input
O Output
B Output
Y1 Output
G Output
W1 Output
C Input
Additional Terminations (1220NC only)
Terminal
W1/E Output
W2 Output
Conventional Systems
Typical Wiring Configurations
NOTE: The "Installer Switch" option will be configured in the next step.
Heat Only or Millivolt
Set Installer Switch to CONV
Rh Power Connection
W Heat Relay (appears as W1/E on 1220NC)
G Fan Relay [note 4]
C 24 Volt AC Transformer Common [note 1]
1 HEAT / 1 COOL Single or Dual Transformer
Set Installer Switch to CONV
Rh 24 Volt AC Power (heating transformer) [note 2]
Rc 24 Volt AC Power (cooling transformer) [note 2]
W1 Heat Relay (appears as W1/E on 1220NC)
Y1 Compressor Relay
G
Fan Relay
C 24 Volt AC Transformer Common [note 1, 3]
Function Description
24 Volt AC Cooling Transformer
(Dual Transformer Systems Only)
Power Connection (24 Volt AC Heating
Transformer or Millivolt Power Source)
Reversing Valve (Cool Active)
Reversing Valve (Heat Active)
1st Stage Compressor
Fan Control
1st Stage Conventional Heat
24 Volt AC Transformer Common
Function Description
(W1) 1st Stage Conventional Heat
(E) Emergency Heat Relay
2nd Stage Heat / Auxiliary Heat
3