3
FURNACE OPERATION
Thermostat Control
There are many types and styles of thermostats. Yours may look
different from the one shown, depending on the type of
thermostat installed with the system. However, almost all
thermostats perform the same basic functions.
There are two switches located on the thermostat. One switch
controls the heating and cooling functions. The other switch is for
FAN operation, either continuous or automatic.
Also on the thermostat is the temperature range for the desired
heating and cooling temperatures.
Lighting the Furnace
1. Set the house thermostat control(s) to the lowest setting.
2. Disconnect power.
3. Remove the burner and control compartment access panel
(2 screws).
4. This appliance is equipped with an automatic ignition device.
Do not try to light the burners by hand.
Gas Control Valve
5. Turn the gas control knob to ON.
6. Replace the burner and control compartment access panel
(2 screws).
7. Reconnect power.
8. Set the thermostat to the desired setting.
NOTE: The outdoor fan and compressor will be off for
approximately 6 minutes following a previous operation or the
interruption of electrical power.
9. If the furnace will not operate, call a qualified person.
Shutting Down the Furnace
1. To shut down the furnace, set all the household thermostat
controls to OFF or to the lowest setting (see Thermostat
Control graphic).
2. Disconnect power.
3. Remove the burner and control compartment access panel
(2 screws).
4. Turn the gas control knob to OFF. See “Gas Control Valve.”
5. Replace the burner compartment access panel (2 screws).
Adjusting the Controls
To Turn the System On or Off
■ Move the selector switch to HEAT or COOL to turn the
system on.
■ Move the selector switch to OFF to turn the system off.
To Select the Temperature
Move the thermostat dial or lever to select the temperature you
would like the system to maintain.
To Operate the Fan
You may wish to increase your comfort by setting your system for
continuous circulation of the indoor air. You may do this by
moving the fan switch on the thermostat.
■ Move the fan switch to ON so the fan will operate
continuously.
■ Move the fan switch to AUTO for the fan to operate only
during heating and cooling periods.
1. Selector switch
2. Room temperature
3. Fan switch
4. Heating & cooling temperature setting
O
N
A
U
T
O
50
60
80
70
60
50
70
80
1
2
F
A
N
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
1. Regulator adjusting cap
2.
¹⁄₈
in. Inlet pressure tap
3.
¹⁄₈
in. Outlet pressure tap
4. Gas control knob
NPT Inlet
NPT Outlet
4
2
1
(20 pages)
(198 pages)
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