1 HEAT / 1 COOL - No Auxiliary Heat
Set System Type to 11HP
Rh 24 Volt AC Power
Rc Connected to Rh with supplied Jumper Wire
O/B
Changeover Valve [note 2]
Y1 Compressor Relay
G Fan Relay
C 24 Volt AC Transformer Common [note 1]
3 HEAT / 2 COOL – Including Auxiliary Heat
Set System Type to 32HP (3220 Only)
Rh 24 Volt AC Power
Rc
Connected to Rh with supplied Jumper Wire
O/B Changeover Valve [note 2]
Y1
Compressor 1 Relay (1st stage heating/cooling)
Y2
Compressor 2 Relay (2nd stage heating/cooling)
E/W3
Auxiliary Heat Relay (3rd stage heating) [note 5]
G Fan Relay
C 24 Volt AC Transformer Common [note 1]
L Optional System Fault Monitor [note 4]
2 HEAT / 1 COOL - Including Auxiliary Heat
Set System Type to 22HP (3220 Only)
Rh 24 Volt AC Power
Rc Connected to Rh with supplied Jumper Wire
O/B
Changeover Valve [note 2]
Y1 Compressor Relay (1st stage heating/cooling)
W2
Auxiliary Heat Relay (2nd stage heating) [note 3]
E Emergency Heat Relay [note 3]
G Fan Relay
C 24 Volt AC Transformer Common [note 1]
L Optional System Fault Monitor [note 4]
2 HEAT / 2 COOL - No Auxiliary Heat
Set System Type to 32HP (3220 Only)
Rh 24 Volt AC Power
Rc Connected to Rh with supplied Jumper Wire
O/B
Changeover Valve [note 2]
Y1
Compressor 1 Relay (1st stage heating/cooling)
Y2
Compressor 2 Relay (2nd stage heating/cooling)
G Fan Relay
C 24 Volt AC Transformer Common [note 1]
L Optional System Fault Monitor [note 4]
NOTES - Heat Pump Systems
[1] Optional 24 Volt AC common connection.
[2] O (cool active) or B (heat active) is selected in
the Installer Settings menu.
[3] Install a field supplied jumper between the
W2 and W1/E/W3 terminals if there is
no separate emergency heat relay installed.
[4] If the L terminal is used, the 24 Volt AC common
must be connected (C terminal).
[5] If a separate emergency heat relay is installed, the
W1/E/W3 terminal should have both the auxiliary
heat 1 relay and emergency heat relay connected.
[6] If a separate emergency heat relay is installed, the
W1/E terminal should have both the auxiliary
heat 1 relay and emergency heat relay connected.
NOTE: The “System Type” option is configured in the Installer Settings. Shaded areas do not apply to 3020.
Heat Pump Systems - Typical Wiring Configurations
5 Installer Manual
2 HEAT / 1 COOL - Including Auxiliary Heat
Set System Type to 21HP (3020 Only)
Rh 24 Volt AC Power
Rc Connected to Rh with supplied Jumper Wire
O/B
Changeover Valve [note 2]
Y1
Compressor Relay (1st stage heating/cooling)
E
Auxiliary/Emergency Heat Relay [note 6]
G Fan Relay
C 24 Volt AC Transformer Common [note 1]
Provide disconnect and overload protection as required.
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]
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