035-19047-002-A-1103
2
Unitary Products Group
SAFETY INFORMATION
FOR YOUR SAFETY
•
Make sure that the furnace area is clear and free of
combustible materials, gasoline and other flamma-
ble vapors and liquids.
•
Be sure the furnace is clear and free of insulating
material. Examine the furnace area after installa-
tion of the furnace or the installation of additional
insulation. Some types of insulation are combusti-
ble.
•
For proper operation of this furnace, air for com-
bustion and ventilation is required. Make sure that
these openings are not obstructed.
•
For lighting or shutting down this furnace, refer to
the lighting instructions provided adjacent to the
burners and also located in this manual.
•
A blocked vent roll-out switch is provided in the
burner compartment. This switch is a manual reset.
If the furnace fails to operate, contact a qualified
service technician.
•
Should the gas supply fail to shut off or if overheat-
ing occurs, shut off the gas valve to the furnace
before shutting off the electrical supply. Then call a
qualified service technician.
•
Do not use this furnace if any part has been under
water. A flood-damaged furnace is extremely dan-
gerous. Attempts to use the furnace can result in
fire or explosion. A qualified service technician
should be contacted to inspect the furnace and to
replace all gas controls, control system parts, elec-
trical parts that have been wet or the furnace if
deemed necessary.
•
Determine the integrity of the installation regarding
the flue gas vent, the return and supply air duct.
Confirm the equipment is well supported and there
are no signs of deterioration. The manufacturer
recommends that main burner, ignition device and
controls are inspected by a qualified service techni-
cian before each heating season.
SYSTEM OPERATION
THERMOSTATS
Set your thermostat for either heating or cooling then
set it for the desired temperature. DO NOT ADJUST
THE THERMOSTAT RAPIDLY ON AND OFF, OR
BACK AND FORTH FROM HEAT TO COOL. THIS
COULD DAMAGE YOUR EQUIPMENT.
Always allow at least 5 minutes between changes. Find
the temperature that is most comfortable to you and
then LEAVE YOUR THERMOSTAT ALONE. (Excep-
tion is for night or vacation “set back” to conserve
energy).
Manually moving the thermostat up or down will not
speed up temperature changes in your rooms. This
only causes the thermostat switch to function at your
command rather than responding to room temperature.
Heat generated by devices other than the furnace may
interfere with thermostat performance. Therefore,
lamps, radios, television sets, etc. should not be placed
near the thermostat.
INTERMITTENT IGNITION DEVICE
When the thermostat calls for heat, gas is supplied and
at the same time, sparking occurs to light the burner.
With the burner lit, the flame sensor rod closes a circuit
to the ignitor control which allows the burner to con-
tinue to fire.
When the room thermostat is satisfied, the electrical
circuit to the gas valve is opened, closing main burner
gas. If the burner should fail to light, contact your heat-
ing contractor or gas utility for service to insure that
proper operating conditions are restored.
FIGURE 1- TYPICAL THERMOSTAT
This furnace is equipped with an intermittent auto-
matic ignition system.
Do Not
attempt to manually
relight the burners. Personal injury could result.
