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Heat Pump Equipment Wiring
3.6
NOTE: For Conventional Systems, see Section 3.5
Connect a single or multi-stage heat pump system to the zone panel as shown. A conventional thermostat may be
used with a heat pump system, however, emergency heat will be controlled by the panel emergency heat switch
or the optional remote emergency heat switch. For a single stage system, the auxiliary heat control is not used.
ALWAYS PROVIDE DISCONNECT AND OVERLOAD PROTECTION AS REQUIRED
1 HEAT / 1 COOL -
No Auxiliary Heat
Set Equipment Type to SSH
Rh
24 VAC Power (Heating Transformer)
Rc Connected to Rh with Jumper
O/B Changeover Valve [Note 4]
Y1 Compressor Call (1st Stage Heating/Cooling)
G Fan Call
C 24 VAC Transformer Common
2 HEAT / 2 COOL - No Auxiliary Heat
Set Equipment Type to MSH
Rh
24 VAC Power
(Heating Transformer)
Rc
Connected to Rh with Jumper
O/B Changeover Valve [Note 4]
L Optional System Fault Monitor
Y1 Compressor Call Stage 1 (1st Stage Heating/Cooling)
Y2
Compressor Call Stage 2 (2nd Stage Heating/Cooling)
G Fan Call
C 24 VAC Transformer Common
2 HEAT / 1 COOL - With Auxiliary Heat
Set Equipment Type to MSH
Rh
24 VAC Power
(Heating Transformer)
Rc
Connected to Rh with Jumper
O/B Changeover Valve [Note 4]
L Optional System Fault Monitor
AUX Auxiliary Heat Relay (2nd Stage Heating)
Y1 Compressor Call Stage 1 (1st Stage Heating/Cooling)
E Emergency Heat Call
G Fan Call
C 24 VAC Transformer Common
3 HEAT / 2 COOL - With Auxiliary Heat
Set Equipment Type to MSH
Rh
24 VAC Power
(Heating Transformer)
Rc
Connected to Rh with Jumper
O/B Changeover Valve [Note 4]
L Optional System Fault Monitor
AUX Auxiliary Heat Relay (3rd Stage Heating)
Y1 Compressor Call (1st Stage Heating/Cooling)
Y2 Compressor Call (2nd Stage Heating/Cooling)
E Emergency Heat Call
G Fan Call
C 24 VAC Transformer Common
9
NOTES
[4] O (cool active) or B (heat active) is selected in the
configuration menu (section 4).
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