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6. Wait five (5) minutes to clear out any gas. Then smell for gas, including
near the floor. If you smell gas, STOP! Follow B in the safety information
on the Operating Instructions located on the back of the controls/access
panel. If you don't smell gas, go to the next step.
7. Move the gas control knob from "OFF" position to "ON" position. Operate
this appliance with the gas control knob in the "ON" position only. Do not
use the gas control knob as a means for throttling the burner input rate.
8. Replace the control door.
9. Turn on all electric power to the appliance.
10. Set the thermostat to the desired setting.
11. If the appliance will not operate, follow the instructions below on how to
shut down the furnace.
WARNING
THE SPARK IGNITOR AND IGNITION LEAD FROM THE IGNITION CONTROL
ARE HIGH VOLTAGE. KEEP HANDS OR TOOLS AWAY TO PREVENT ELEC-
TRICAL SHOCK. SHUT OFF ELECTRICAL POWER BEFORE SERVICING ANY
OF THE CONTROLS. FAILURE TO ADHERE TO THIS WARNING CAN RESULT
IN PERSONAL INJURY OR DEATH.
The initial start-up on a new installation may require the control system to
be energized for some time until air has bled through the system and fuel
gas is available at the burners.
TO SHUT DOWN FURNACE
1. Set the thermostat to the lowest setting.
2. Turn off all electric power to the appliance if service is to be performed.
3. Remove control door.
4. Move control knob to the "OFF" position.
5. Replace control door.
WARNING
SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF,
SHUT OFF THE MANUAL GAS VALVE TO THE APPLIANCE BEFORE SHUT-
TING OFF THE ELECTRICAL SUPPLY. FAILURE TO DO SO CAN RESULT IN
AN EXPLOSION OR FIRE CAUSING PROPERTY DAMAGE, SEVERE PERSON-
AL INJURY OR DEATH!
BURNERS
Burners for these units have been designed so that field adjustment is not required.
Burners are tray-mounted and accessible for easy cleaning when required.
MANUAL RESET OVERTEMPERATURE CONTROL
Four manual reset overtemperature controls are located on the burner shield. These
devices senses blockage in the heat exchanger or insufficient combustion air. This
shuts off the main burners if excessive temperatures occur in the burner compart-
ment.
Operation of this control indicates an abnormal condition. Therefore, the unit should
be examined by a qualified installer, service agency, or the gas supplier before being
placed back into operation.
WARNING
DO NOT JUMPER THIS DEVICE! DO NOT RESET THE OVERTEMPERATURE
CONTROL WITHOUT TAKING CORRECTIVE ACTION TO ASSURE THAT AN
ADEQUATE SUPPLY OF COMBUSTION AIR IS MAINTAINED UNDER ALL CON-
DITIONS OF OPERATION. FAILURE TO DO SO CAN RESULT IN CARBON
MONOXIDE POISONING OR DEATH. REPLACE THIS CONTROL ONLY WITH
THE IDENTICAL REPLACEMENT PART.
PRESSURE SWITCH
This furnace has two sets of pressure switches for sensing a blocked exhaust or a
failed induced draft blower. They are normally open and close when the induced draft
blower starts, indicating air flow through the combustion chamber.
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Table of Contents
Troubleshooting
