18
920-087-06
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 de-
pendent on the fan mode selected, either continuous or cycling.
See page 16 for fan cycle control.
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 com-
pressor on and operate as a heat pump to maintain the room
temperature while running more ef
fi
ciently 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 5 controls the fan mode, see
page 17 for setting.
When the outdoor coil temperature falls below 30°F for more
than 2 minutes 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 re-
sistance 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
5 controls the fan mode, see page 16 for setting.
Emergency Heat Operation
In the event of a compressor failure in heat pump mode the com-
pressor 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 7 controls the
emergency heat setting, see page 16.
Fan Mode
Fan Only
Pressing the ‘
Fan Only
’ button will run the fan to allow for
air circulation in the room without operating the compressor
or heater regardless of the room or set temperature. The fan
speed selection is made by pressing either the ‘
High Fan
’ or
‘
Low Fan
’ button.
Figure 12
Digital Control Panel
Cycle/Continuous
The owner may choose between fan cycling or fan continu-
ous mode based on property preference (Note: Even heat
monitoring and quiet start/stop fan delay only operate in fan
cycle mode). Fan continuous mode is used to keep constant
air
fl
ow circulation in the room during all times the unit is ‘ON’.
Fan cycle will conserve energy by only operating the fan while
the compressor or electric heater is operating. Dip switch 5
controls the fan mode, see page 17 for setting.
Optional Hand Held Remote Control Operation
Friedrich PTAC units can be con
fi
gured to operate via an op-
tional hand held remote control for added convenience. The
PTAC control board comes shipped with all of the necessary
hardware to communicate to the PDXRC remote control. In
order to operate the unit with the remote control, the remote
control sensor must be enabled. Simply press and hold the
‘Temp’ and buttons simultaneously for three seconds, and
the LED window will display and “
E
” for con
fi
rmation when the
remote is enabled. To disable the feature press ‘Temp’ and
buttons at the same time for three seconds. LED will display
an “
O
” as acknowledgment for one second.
The remote control is now ready for use. The temperature, mode
and fan speed control from the remote control will operate the
unit the same as the unit mounted controls.
NOTE: The hand held remote control cannot be used in conjunc-
tion with a wall mounted thermostat.
Figure 13
Remote Control
Low
Temperature
Cool
Power
Cooler
Fan
Only
Warmer
Heat
Fan
High
Fan
