Digital Control User Input Configuration - Friedrich PTAC series Service Manual

DIGITAL CONTROL USER INPUT CONFIGURATION

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
temperature 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'.
Note: In order for the control to recognize "Dip" switch setting changes, the PTAC must be disconnected from
power supply when making any configuration changes.
14
Heating Range Switches 1 & 2
Temperature
Range
Low High
60 90
60 87
60 84
60 81
Cooling Range Switches 3 & 4
Temperature
Range
Low High
60 90
63 90
66 90
69 90
Factory Dip Switch Configuration
ON
1 2 3 4 5 6 7 8
Dip
Switch
2
1
On On
Off On
Off Off
On Off
Dip
Switch
3
4
On On
On Off
Off Off
Off On
DIP