Conventional Systems - Braeburn 3020 Installer's Manual

3
Connecting Your Wires
(continued)
Wiring Terminations for model 3220
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 / W3 Output (W1) 1st Stage Conventional Heat,
(E) Emergency Heat,
(W3) 3rd Stage Auxiliary Heat
W2 Output 2nd Stage Conventional Heat
O / B / V3 Output (O) Cool Active Reversing Valve
(B) Heat Active Reversing Valve
(V3) Zone Valve Power Close
Y1 Output 1st Stage Compressor
Y2 Output 2nd Stage Compressor
L Input System Malfunction Indicator
C Input 24 Volt AC Transformer Common
S1
Input Optional Remote Sensor (indoor or outdoor)
S2
Installer Guide 4

Conventional Systems

Typical Wiring Configurations
NOTE: The "System Type" option will be configured in the Installer Settings section. The 3020 is a single stage
thermostat and not intended for multi stage equipment.
Heat Only or Millivolt
Set System Type to 11CONV
Rh Power Connection
W1 Heat Relay
1 HEAT / 1 COOL Single or Dual Transformer
Set System Type to 11CONV
Rh 24 Volt AC Power (heating transformer) [note 2]
Rc 24 Volt AC Power (cooling transformer) [note 2]
W1 Heat Relay
Y1 Compressor Relay
G Fan Relay
C 24 Volt AC Transformer Common [note 1, 3]
2 HEAT / 2 COOL Single or Dual transformer
Set System Type to 22CONV
Rh 24 Volt AC Power (heating transformer) [note 2]
Rc 24 Volt AC Power (cooling transformer) [note 2]
W1 Heat Relay Stage 1
W2 Heat Relay Stage 2
Y1 Compressor Relay Stage 1
Y2 Compressor Relay Stage 2 [note 4]
G
Fan Relay
C 24 Volt AC Transformer Common [note 1, 3]
Additional Wiring Options
NOTE: Additional options are configured in the
Installer Settings section.
S1
Indoor or Outdoor Remote Sensor [note 1]
S2
Hydronic Heat Only
Set System Type to 1HD
Rh 24 Volt AC Power (heating transformer)
W1 Zone Valve Power Open
V3 Zone Valve Power Close
C 24 Volt AC Transformer Common [note 1]
Hydronic Heat / 1 Cool
Set System Type to 11HD
Rh 24 Volt AC Power (heating transformer) [note 2]
Rc 24 Volt AC Power (cooling transformer) [note 2]
W1 Zone Valve Power Open
V3 Zone Valve Power Close
Y1 Compressor Relay
G
Fan Relay (cooling fan only)
C 24 Volt AC Transformer Common [note 1, 3]
NOTES - Conventional Systems
[1] Optional 24 Volt AC common connection.
[2] Remove factory installed jumper for dual
transformer systems.
[3] In dual transformer systems, transformer
common must come from cooling transformer.
[4] Connect Y2 only if a second cooling compressor
is being used.
Provide disconnect and overload protection as required.
NOTES - Additional Wiring Options
[1] These terminals can be used to connect a
Braeburn indoor or outdoor remote sensor.
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5 Installer Guide