GE AZ45E07EA Series Technical Service Manual page 12

• THIRD STAGE HEAT (HEATERS A AND B ONLY)
When the room temperature falls below 2.7°F from the temperature control set point, the heat pump
operation will stop. Stage 3 heating is activated (based on power cord) for all outdoor temperatures,
except for l2R lock out conditions. I2R lockout prohibits all resistance heating and will only allow heat
pump and boost heating. Stage 3 will continue to operate until the room temperature exceeds the
temperature control set point by 0.9°F, at which time the heaters will shut down.
Stage Heating Mode Logic for AZ6500 Series
Temp. Setting +0.9°F
Temp. Setting
Room
Temp.
Temp. Setting -1.8°F
Temp. Setting -2.7°F
COMPRESSOR
HEATER A
HEATER B
ON
ON
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ON
ON
ON