Braeburn 1220NC - Manual (Page 4)

3
Terminal Function Description
Rc Input 24 Volt AC Cooling Transformer
(Dual Transformer Systems Only)
Rh Input Power Connection (24 Volt AC Heating
Transformer or Millivolt Power Source)
O Output Reversing Valve (Cool Active)
B Output Reversing Valve (Heat Active)
Y1 Output 1st Stage Compressor
G Output Fan Control
W1 Output 1st Stage Conventional Heat
C Input 24 Volt AC Transformer Common
Connect Your Wires 3
Wiring Terminations
Terminal Function Description
W1/E Output (W1) 1st Stage Conventional Heat
(E) Emergency Heat Relay
W2 Output 2nd Stage Heat / Auxiliary Heat
Additional Terminations (1220NC only)
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]
Typical Wiring Configurations
NOTE: The “Installer Switch” option will be configured in the next step.
Conventional Systems
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]