Braeburn 2020NC - Provide Power; Connect Your Wires

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 CompressorRelay
 G   Output FanControl
 W1   Output ConventionalHeatRelay
 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 (2220NC only)
Provide Power
•For 24 Volt AC power,youmustconnectthecommonsideofthetrans-
 formertotheCterminalonthethermostatsub-base.
•For primary or back-up 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.
24VAC Power
Terminal (C)
2
C