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24
°F vs. °C Display
The unit is factory configured to display all temperatures in degrees
Fahrenheit (° F). To switch to degrees Celsius press the ‘Low fan’ and
‘Temp. Down’ buttons simultaneously for three seconds. The display will show
a ‘C’ as acknowledgment of the change. To revert back to ° F press the ‘Fan
Only’ and ‘Low Fan’ buttons simultaneously for three seconds. The
display will show an ‘F’ as acknowledgment of the change.
Cooling Mode
Pressing the ‘Cool’ button while the unit is in any mode, including off, will
put the unit into cooling mode. Adjust the temperature readout to the
desired room temperature and the unit will cycle the compressor on and off
to maintain a comfortable room. The compressor will come on anytime that
the room temperature is 1.8° F above the desired temperature. The fan
operation is dependent on the fan mode selected, either continuous or
cycling. See Constant Fan Mode.
Heating Mode
Pressing the ‘Heat’ button while the unit is in any mode, including off, will put
the unit into heating mode.
Heat Pump Models (PDH)
When the ‘Heat’ button is pressed initially the unit will energize the electric
resistance heat to quickly bring the room to the set temperature. When the
desired room temperature falls 1.8° F below the desired set temperature the unit
will cycle the compressor on and operate as a heat pump to maintain the
room temperature while running more efficiently than resistance heat only
models. If the room temperature should fall more than 5° F from the set
temperature the unit will run the resistance heater. The fan operation is
dependent on the fan mode selected, either continuous or cycling. Dip
switch 3 controls the fan mode, see page 23 for setting.
When the outdoor coil temperature falls below 30° F for more than 2 min-utes
the unit will operate the resistance heaters and not the compressor. When
the outdoor coil temperature reaches 45° F the compressor will be allowed to
operate again.
Heat/Cool Models (PDE)
After pressing the ‘Heat’ button, adjust the temperature readout to the
desired room temperature and the unit will cycle the resistance heat on
and off to maintain a comfortable room. The heater will come on anytime
that the room temperature is 1.8° F below the desired temperature. The
fan operation is dependent on the fan mode selected, either continuous
or cycling. Dip switch 3 controls the fan mode, see page 23 for setting.
Emergency Heat Operation
In the event of a compressor failure in heat pump mode the compressor may
be locked out to provide heat through the resistance heater. This feature
ensures that even in the unlikely event of a compressor failure the room
temperature can be maintained until the compressor can be serviced. Dip
switch 1 controls the emergency heat setting, see page 23.
Constant Fan Mode
Pressing the Constant fan mode button will provide constant fan operation
in cooling or heating modes. The fan speed selection is made by pressing
either "High" or "Low" fan speed button.
Cycle/Continuous (Factory Default)
The owner may choose between fan cycling or fan continuous mode
based on property preference (Note: Even heat monitoring and quiet
start/stop fan delay only operate in heat mode + cycle mode). Cycle fan
will conserve energy by only operating the fan when the call for cooling
or heating is required.
Digital Control Operation
Figure 32
Digital Control Panel
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