Braeburn 3020 Installer Manual page 3

3
Connecting Your Wires
Wiring Terminations for model 3220
Terminal Function
Rc Input
Rh Input
G Output
W1 / E / W3 Output
W2 Output
O / B / V3 Output
Y1 Output
Y2 Output
L Input
C Input
S1
Input
S2
(continued)
Description
24 Volt AC Cooling Transformer
(Dual Transformer Systems Only)
Power Connection (24 Volt AC Heating
Transformer or Millivolt Power Source)
Fan Control
(W1) 1st Stage Conventional Heat,
(E) Emergency Heat,
(W3) 3rd Stage Auxiliary Heat
2nd Stage Conventional Heat
(O) Cool Active Reversing Valve
(B) Heat Active Reversing Valve
(V3) Zone Valve Power Close
1st Stage Compressor
2nd Stage Compressor
System Malfunction Indicator
24 Volt AC Transformer Common
Optional Remote Sensor (indoor or outdoor)
3 Installer Manual