Connect your wires, Provide power – Braeburn 2220 User 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
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
Y2
Output
2nd Stage Conventional Cooling Compressor
W2
Output
2nd Stage Heat / Auxiliary Heat
Additional Terminations (2220 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