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Wiring / Installation

Emerson Blue Easy Reader 1F95EZ-0671

Heat Pump / Dual Fuel Staging Detail

2nd Stage:

HP1Heat Mode

3rd Stage:

HP1Heat Mode

1st Stage: Emergency Mode 2nd Stage: Emergency Mode

3rd Stage: HP2 – Heat Mode 4th Stage: HP2 – Heat Mode

1st Stage: Emergency Mode 2nd Stage: Emergency Mode

W/E W2

Dual fuel option de-energizes any compressor stage when auxiliary heat is energized.

Terminal Designations (Wiring)

Terminal Description SS1 MS2 HP1 HP2O/B Reversing Valve x x

Y2 2nd Stage Compressor x x

Y1 1st Stage Compressor x x x x

G Fan Relay x x x x

RC Power for Cooling x x x x

RH Power for Heating x x x x

C Common Wire x x x x

W/E1st Stage Heat or Aux Heat for HP2 x x x x

W22nd Stage Heat MS2 or 4th Stage Heat HP2 x x

L Diagnostics (Optional)

Wiring for Conventional Systems(Non-Heat Pump)

*

*For two transformer systems remove the jumper Common connection optional – required for diagnostic indicator

Single Stage (SS) in YellowMulti-Stage (MS) add Blue

Y2Y W/E W2 G RH RC C

#6 Terminal is for a power closed 3 wire zone valve

Wiring for Heat Pump SystemsHeat Pump (HP1) in YellowHeat Pump (HP2) add Blue

Y2YO/B G*W/E C*W2

Common connection required for diagnostic or malfunction indication.

Dual Fuel option, if selected turns off compressor(s) when Auxiliary stages energizes.