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4 Wire Heat Pump (heat/cool) without Auxiliary Heat
STEP 1 - Connect O wire to the O terminal or B wire to the B. This connects the change-over valve.
If you have both O and B - connect only the O wire to the O terminal and DO NOT connect B to B
terminal (see wire reference under Trane for B wire terminal).
STEP 2 - Connect the Y wire to Y terminal. This connects the compressor.
STEP 3 - Connect the R wire to RH. This connects the power.
STEP 4 - Connect the G wire to the G. This connects the fan.
STEP 5 - Set HVAC selection switch to HEAT PUMP and set the HEAT.
TYPE to ELEC.
Your HVAC system is now connected to the 3M-50.
Please Go To Page 6
STEP 1 - Connect O wire to the O terminal or B wire to the B. This connects the change-over valve.
If you have both O and B - connect only the O wire to the O terminal and DO NOT connect B to B
terminal (see wire reference under Trane for B wire terminal).
STEP 2 - Connect the W2 wire to W2 terminal. This connects the auxiliary heat.
STEP 3 - Connect the Y wire to Y terminal. This connects the compressor.
STEP 4 - Connect the R wire to RH terminal. This connects the power.
STEP 5 - Connect the G wire to G terminal. This connects the fan.
STEP 6 - Set HVAC selection switches to heat pump and:
If you have gas or oil auxiliary heat, set the HEAT TYPE to GAS.
If you have electric auxiliary heat, set the HEAT TYPE to ELEC.
Your HVAC system is now connected to the 3M-50.
Please Go To Page 6
5 Wire Heat Pump w/ Aux Heat
C
POWER
or
C B O W
W Y Y
2
Terminals
REMOTE POWER
or
C H B O W
W Y Y
2
Terminals
HEAT PUMP SYSTEM
O
B
Y
R G
or
RH RC G A
2
HEAT PUMP SYSTEM
C
O
B
Y
R G
W2
or
RH RC G A
2
15
PG
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