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3rd 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. 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
– 12 –
ON
ON
ON
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