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14. Reconnect power.
NOTE: On power up, the LCD readout will display oP
momentarily, then the room temperature.
2
3
4
5
6
3.30"
(83.8 rnm)
Fan button on Thermostat
The PTAC/PTHP fan will automatically cycle with the heating and
cooling operation and will remain off when the PTAC/PTHP is off.
Press the FAN button on the thermostat until "FAN" is displayed
to cause the fan to run continuously, even when the heating and
cooling operations are off.
Fan Speed switch on PTAC/PTHP control panel
The Fan Speed switch on PTAC/PTHP control panel selects
between low and high fan speed and is independent of the wall
thermostat.
(20.3 mrn)
4.55"
(115.6 mrn)
!. Heat display 4. Set display
2. Cool display 5. Mode button
3. Fan display 6. Fan button
Fan Operation
1. To start fan operation, press FAN button on thermostat until
"FAN" is displayed.
2. To stop fan operation, press FAN button on thermostat until
"FAN" is no longer displayed,
Heating Operation
1. Press and release MODE button on thermostat until HEAT is
displayed.
2. Press • button until LCD readout reads 10 degrees above
displayed room temperature. Heating system should begin to
operate within 5 minutes.
Cooling Operation
1. Press and release MODE button on thermostat until COOL is
displayed.
2. Press • button until LCD readout reads 10 degrees below
displayed room temperature. Cooling system should begin to
operate within 5 minutes.
Temperature Display
The thermostat will display room temperature until the • or •
buttons are pressed. The word SET appears when these buttons
are pressed, and the current set point is displayed. If no buttons
are pressed for 5 seconds, the display will change back to show
room temperature.
Mode button on Thermostat
Press the MODE button on the thermostat to turn the PTAC/
PTHP off or to select heating or cooling operation.
Delay Timer
A 5-minute time delay is built into the thermostat immediately
upon power up, and any time the compressor turns off. The
compressor will not turn on until the delay timer has expired.
Pressing • and FAN buttons simultaneously will override the
delay timer for 1 cycle,
Cycle Timer
In normal heating and cooling operation, the thermostat will not
allow more than 4 cycles per hour (or 1 cycle every 15 minutes).
Both the Y and W outputs have a 15-minute timer that starts
counting down when the output is turned on, (e.g,, if Y output is
turned on for 9 minutes and then satisfies, it cannot turn back on
for another 6 minutes regardless of demand). Pressing • and
FAN buttons simultaneously or changing the set point will
override the timer for 1 cycle,
Minimum on Timer
Once the PTAC/PTHP has turned on, it will remain on for a
minimum of 3 minutes regardless of demand, The PTAC/PTHP
can turn off in less than 3 minutes if mode or set point change.
Error Messages
E4 Internal memory failure. Replace
thermostat.
- - (two dashes) Cannot read room temperature. Replace
thermostat.
26
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