Wiring Terminations for model 5020
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)
G Output Fan Control
W1 / E Output (W1) Conventional Heat Relay
(E) Auxiliary/Emergency Heat
O / B / V3 Output (O) Cool Active Reversing Valve
(B) Heat Active Reversing Valve
(V3) Zone Valve Power Close
Y1 Output Compressor Relay
C Input 24 Volt AC Transformer Common
S1
S2
Connect Your Wires
3
Input Optional Remote Sensor (indoor or outdoor)
Install your new Braeburn thermostat in 4 basic steps:
1 Install the sub-base 3 Connect your wires
2 Provide Power 4 Attach the thermostat to the sub-base
Install the Sub-Base:
• Remove the sub-base from the body
of the thermostat.
• Mount the sub-base as shown below:
UP
UP
Provide Power
Drill 3/16” pilot holes
in your desired location.
Use supplied anchors for
drywall or plaster.
2
Installation and Wiring
1
2
+
+
For battery power, insert the 2 supplied “AA” type alka-
line 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 cor-
rectly with the +/- symbols in the battery compartment.
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 tranformer
common must come from the cooling transformer.
Installer Manual 2