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Installation Instructions
Residential & Commercial Heat Pump with
‘O’ Reversing Valve
5 Wire, 1 Stage Cooling, 1 Stage Heat
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
Y1 1st Stage Compressor
(Cool or Heat)
G Fan
J1 = Heat Pump
J2 = O
J3 = Gas
Residential & Commercial Heat Pump with
‘O’ Reversing Valve.
8 Wire, 2 Stage Cooling, 4 Stage Heat
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
W2 3rd Stage Heat
W3 4th Stage Heat
Y1 1st Stage Compressor
(Cool or Heat)
Y2 2nd Stage Compressor
(Cool or Heat)
G Fan
J1 = Heat Pump
J2 = O
J3 = Electric
Setup Step 24 is set to 2
(Number of Compressor Stages)
Residential & Commercial Heat Pump with
‘O’ Reversing Valve
6 Wire, 1 Stage Cooling, 2 Stage Heat
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
Y1 1st Stage Compressor
(Cool or Heat)
W2 Aux Heat
G Fan
J1 = Heat Pump
J2 = O
J3 = Electric
Residential & Commercial Heat Pump with
‘O’ Reversing Valve.
7 Wire, 2 Stage Cooling, 3 Stage Heat
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
W2 3rd Stage Heat
Y1 1st Stage Compressor
(Cool or Heat)
Y2 2nd Stage Compressor
(Cool or Heat)
G Fan
J1 = Heat Pump
J2 = O
J3 = Electric
Setup Step 24 is set to 2
(Number of Compressor Stages)
Sample Wiring Diagrams
Heat Pump Systems
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