Operating instructions

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5. If the vehicle contains more than one ZONE, depress
the FAN and MODE push-buttons simultaneously to
select ZONE 2, and repeat procedures from Step 1.
Repeat entire procedure for each additional zone.
NOTE: If set point is too low, the inside coil could
freeze up.
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C. HEAT PUMP OPERATION
(To set heating temperatures for vehicles equipped with a
Duo-Therm rooftop or basement heat pump. To operate
cooling mode with a heat pump, see "B. Cooling Mode
Operation".)
1. Momentarily depress and release the MODE
pushbutton until the HEAT PUMP indicator on the LCD
is illuminated.
2. If you have not previously set your fan speed, you may
do so by depressing and releasing the FAN pushbutton
to select.
3. Depress and release the UP pushbutton to increase
the temperature or the DN pushbutton to decrease the
desired temperature. The final selected SETPOINT
will be displayed in the LCD area of the Comfort
Control Center.
4. After a delay of approximately 2 minutes the heat
pump's compressor will come on and the heating
process will begin. Once the room temperature reaches
the selected SETPOINT, the compressor will cycle off.
Once the Comfort Control Center senses the need for
heating, the compressor will restart in approximately
two minutes. At this point, the fan will either:
a. continue to operate in the single selected fan speed
or,
b. cycle OFF and ON with the compressor if the AUTO
fan speed has been selected.
5. If the vehicle contains more than one ZONE, depress
the FAN and MODE pushbuttons simultaneously to
select ZONE 2, and repeat procedures from Step 1
above. Repeat entire procedure for each additional
zone.
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D. FURNACE MODE OPERATION
(If the vehicle is equipped with a gas furnace connected to the
Comfort Control Center)
1. Momentarily depress and release the MODE
pushbutton until the FURNACE indicator on the LCD
is illuminated.
2. The A/C fan does not operate in the FURNACE mode.
3. Depress and release the UP pushbutton to increase
the temperature or the DN pushbutton to decrease the
desired temperature. The final selected SETPOINT
will be displayed in the LCD area of the Comfort
Control Center.
4. The Duo-Therm air conditioning system will not oper-
ate when the Comfort Control System is in the FUR-
NACE mode. For cooling, change the MODE to COOL.
5. If the vehicle contains more than one ZONE,
depress the FAN and MODE pushbuttons simulta-
neously to select ZONE 2, and repeat procedures
from Step 1 above. Repeat entire procedure for
each additional zone. NOTE: When furnace mode
is selected in any Zone, all air conditioner or
heat pump units will terminate operation.
NOTE: See
Sections K & L
for additional
Special Heat
Pump Features.
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