17
920-087-06
Digital Control User Input Con
fi
guration
The adjustable control dip switches are located at the lower left hand portion of the digital Smart Center. The inputs are only visible
and accessible with the front cover removed from the PTAC.
Dip Switch Setting
1) Electronic Temperature Limiting – Switches 1-4
The digital control is set from the factory to allow a tempera-
ture range between 60°F and 90°F in both heating and cooling
mode. Dip Switches 1-4 can be used to set high and low limits
for either heating or cooling or both.
From the factory all four switches are in the up
‘ON’
position. The
charts to the right show the available electronic limiting ranges.
2) Fan Cycle Control – Switch 5
All PTACs are shipped from the factory with Dip Switch 5 in the
‘
OFF
’ position to cycle the fan only when there is a demand for
the compressor or heater. As an option the fan may be set to
‘continuous’ mode by switching Dip Switch 5 to
‘ON’
position to
run the fan continuously while the unit is powered on.
To ensure that the room temperature is maintained evenly while
in fan cycle mode the
Even Temp Load Anticipation
feature is
enabled.
Quiet Fan Delay
is also enabled in fan cycle mode to
lessen the acoustical change between compressor start up and
shut off by running the fan for 5 seconds before each demand cycle,
and 30 seconds after cooling or 15 seconds after heating cycles.
3) Room Freeze Protection – Switch 6
Units are shipped from the factory with the room freeze protection
disabled. Room Freeze Protection can be switched on at the
owner’s preference by moving Dip Switch 6 to
‘ON’
. This feature
will monitor the indoor room conditions and in the event that the
room falls below 40°F the unit will cycle on high fan with the
electric heater. This occurs regardless of mode.
4) Emergency Heat Override – Switch 7
In the unlikely event of a compressor failure a heat pump unit
may be switched to operate in only the electric heat mode until
repairs can be made. Moving Dip Switch 7 to
‘ON’
.
PTAC must be disconnected from power supply
when making any con
fi
guration changes.
Temperature
Range
Dip
Switch
Low
High
3
4
60
90
On
On
63
90
On
Off
66
90
Off
Off
69
90
Off
On
Cooling Range Switches 3 & 4
Heating Range Switches 1 & 2
Temperature
Range
Dip
Switch
Low
High
1
2
60
90
On
On
60
87
Off
On
60
84
Off
Off
60
81
On
Off
Digital Control Operation
Temperature Display
The Friedrich digital PTAC is shipped from the factory to display
the desired room temperature on the LED readout.
The unit can be con
fi
gured to display the room temperature by
simultaneously pressing the ‘
Cool
’ and ‘
High Fan
’ buttons
for three seconds the display will show an ‘
R
’ for one seconds
to acknowledge the change. The unit will display the setpoint
whenever the ‘Temp’ or buttons are pressed and then
switch back to room temperature.
To revert back to displaying the setpoint only press the ‘
Cool
’ and
‘
Low Fan
’ buttons for three seconds simultaneously, the unit will
display an ‘
S
’ for one seconds to acknowledge the change.
˚
F vs.
˚
C Display
The unit is factory con
fi
gured to display all temperatures in
degrees Fahrenheit (
º
F
). To switch to degrees Celsius press
the ‘
Fan Only
’ and
‘Low Fan’
buttons simultaneously for three
seconds. The display will show a ‘
C
’ as acknowledgement of
the change.
To revert back to
º
F press the ‘
Fan Only
’ and
‘
Low Fan
’ buttons
simultaneously for three seconds. The display will show an ‘
F
’
as acknowledgement of the change.
Figure 11
Factory Dip Switch Con
fi
guration
1 2 3 4 5 6 7 8
O
N
IMPORTANT
