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1. Set the room thermostat to lowest setting.
2. Remove burner access door.
3. Move the gas control knob to the “ON” position. Use
only your hand to turn the gas control knob; never use
tools. If the knob will not turn by hand, don’t try
to repair it; call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
4. Replace the burner access door.
5. Turn on the electrical power to the furnace.
6. Set the room thermostat to a point above room tempera-
ture to light the main burners. After the burners have
ignited, set the room thermostat to desired temperature.
To Shut Down Furnace:
1. Set the room thermostat to the lowest setting.
2. Turn off all electric power to the furnace.
3. Remove burner access door.
4. Shut off the gas by moving the gas control knob to the
“OFF” position.
5. Replace the burner access door.
Continuous Blower Operation
If continuous blower operation on low speed is desired,
connect the lowest speed motor tap to the “CONT” terminal
on the blower control board (refer to the furnace wiring
diagram.) The blower will operate on low speed whenever
main power is connected to the furnace, except when it
operates on heating or cooling speed during thermostat
call for heat or cooling. This constant air terminal is
intended for low speed only. If a motor is wired for a
higher speed, the increased amp draw could cause the
board control to fail and void the warranty.
Humidifier
Terminals are provided on the blower control board for
connection to a 120-volt humidifier. The “HUM” terminal is
energized whenever the thermostat calls for heat. Refer to
furnace wiring diagram for specific connection information.
Electronic Air Cleaner
Terminals are provided on the blower control board for
connection of a 120-volt electronic air cleaner. The “EAC”
terminal is energized whenever the thermostat calls for
heat, cooling, or continuous blower. Refer to the furnace
wiring diagram for specific connection information.
Twinning
The blower control board is designed to permit “twinning” of
furnaces (two furnaces connected to a common supply
and return air system, and controlled by one thermostat).
An accessory kit must be ordered from the manufacturer.
Specific wiring and operating instructions are included
with the kit.
Each furnace must have its own dedicated vent system.
START-UP
Lighting Instructions
For Your Safety, Read Before Operating
These furnaces are equipped with an ignition device which
automatically lights the burner. Do not try to light the
burner by hand.
Before operating, smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas
is heavier than air and will settle on the floor.
What to do if you smell gas:
• Do not try to light any appliances.
• Extinguish any open flame.
• Do not touch any electric switch; do not use any phone
in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire
department.
Do not use this furnace if any part has been under water.
Immediately call a qualified service technician to inspect
the furnace and to replace any part of the control system
and gas control which has been under water.
IMPORTANT: Refer to the Lighting Instruction label on
the furnace for instructions on operating the specific
controls used on your unit.
To Start Furnace:
Be sure the manual gas control has been in
the “OFF” position for at least 5 minutes
before starting the unit. Do not attempt to
manually light the burners.
CAUTION
If you do not follow these instructions exactly,
a fire or explosion may result causing prop-
erty damage, personal injury, or loss of life.
WARNING
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