– 21 –
Heat Mode Operation
Note:
• Minimum compressor/fans off time is 3 minutes +/- 10 seconds.
• Heat pump will not operate if outdoor thermistor sees 25°F or less.
• Heat pump and resistance heater(s) do not operate at the same time.
• Indoor and outdoor fans operate at the same time, with the following exception: Should the indoor coil
temperature reach 131°F, the outdoor fan will stop until the indoor coil temperature lowers to 126°F.
Heat pump model
currently heating with
an outdoor temperature
above 25 ˚F.
Indoor fan, outdoor
fan, compressor
energized.
Thermostat
satisfied.
Indoor fan, outdoor
fan, compressor
off.
Thermostat not
satisfied.
Indoor fan, outdoor
fan on.
Compressor on. 3 SECOND DELAY
Heat pump model
currently off with an
outdoor temperature
above 25 ˚F.
Set thermostat to
heat mode. Adjust
thermostat to
setting above
room temperature.
Indoor fan, outdoor
fan, resistance
heaters energized.
Thermostat
satisfied.
Indoor fan, outdoor
fan, resistance
heaters off.
Nonheat pump model
currently heating
or
heat pump model
currently heating with
an outdoor temperature
below 25 ˚F.
Indoor fan, outdoor
fan, resistance
heaters energized.
Thermostat
satisfied.
Indoor fan, outdoor
fan, resistance
heaters off.
Thermostat not
satisfied.
Indoor fan, outdoor
fan, resistance
heaters energized.
Thermostat
satisfied.
Nonheat pump model
currently off
or
heat pump model
currently off with an
outdoor temperature
below 25 ˚F.
Set thermostat to
heat mode. Adjust
thermostat to
setting above
room temperature.
(Continued next page)
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