Braeburn 3020 Detailed Installer Manual page 3

2
Provide Power
C
24VAC Power Terminal (C)
• For 24 Volt AC power, you must connect the common side of the transformer to the C terminal on the thermostat sub-base. In
dual transformer installations, the transformer common must come from the cooling transformer.
• For battery power, insert the 2 supplied "AA" type alkaline batteries into the battery compartment located in the rear
housing of the thermostat. Make sure to position the Positive (+) and Negative (-) sides of the batteries correctly with
the +/- symbols in the battery compartment.
3
Connect Your Wires
Wiring Terminations for model 3020
Terminal Function
Rc Input
Rh Input
G Output
W1 Output
O / B / V3 Output
Y1 Output
C Input
S1
Input
S2
Description
24 Volt AC Cooling Transformer
(Dual Transformer Systems Only)
Power Connection (24 Volt AC Heating
Transformer or Millivolt Power Source)
Fan Control
Conventional Heat Relay
(O) Cool Active Reversing Valve
(B) Heat Active Reversing Valve
(V3) Zone Valve Power Close
Compressor Relay
24 Volt AC Transformer Common
Optional Remote Sensor (indoor or outdoor)
+
+
Batteries Installed as Shown
3 Installer Guide