Circulating Air Filters - Goodman GMN SERIES Installation & Operating Instructions Manual

Gas furnaces

Table of Contents

The purpose of this device is to disconnect all power to the furnace in event the blower door should become dislodged or

is not installed. Operation of this furnace with the blower door being out of position will allow toxic combustion fumes to be

transmitted into the living area via the circulating air blower. With the furnace in operation remove the blower door, the blower

and burners should stop. Replace blower door.

STACK OVERTEMP SWITCH

Mounted on the Vent blower housing, this switch is designed to shut down the burners if the main blower should fail to operate.

To test this switch disconnect the main blower, bypass the main limit, and place the furnace into operation. After a period

of time this switch should function and the burners extinguish. IT IS IMPORTANT TO REMOVE THE JUMPER FROM THE

MAIN LIMIT AND RECONNECT THE BLOWER prior to returning this furnace into operation.

This appliance is equipped with an integrated hot surface ignition module / fan control. The function of this device is to ignite

the burners and to control the blower and venter functions.

When a call for heat is generated by the room thermostat the control activates the vent blower relay. After a short pre-purge

the hot surface ignitor is energized. The main valve is opened after the ignitor has been glowing for about 17 seconds. If

main burner flame is detected by the flame sensor (see flame sensor section) the burners will continue operation.

Unlike the traditional thermal fan control this device activates the blower at a predetermined time (nominal 30 seconds) after

the main valve is energized, not after the bonnet has achieved a certain temperature. This control is located in the blower

compartment. The blower motor is deactivated approximately 2 1/2 minutes after the burners are extinguished.

CAUTION: DISCONNECT THE MAIN POWER TO THE UNIT BEFORE ATTEMPTING ANY MAINTENANCE.

1.) Keep the air filters clean.

2.) Inspect filters monthly and replace when necessary. A new home may require more frequent attention

to the filters until dust from construction is removed.

3.) Permanent filters may be cleaned by using a vacuum cleaner and washing with detergent and water.

Air dry thoroughly and reinstall. Disposable filters cannot be cleaned.

CAUTION :

DO NOT OPERATE YOUR SYSTEM FOR EXTENDED PERIODS WITHOUT FILTERS. DUST IN

THE AIR WILL RESTRICT THE AIR MOVEMENT OVER THE SECONDARY (CONDENSING) COIL

CAUSING NUISANCE CYCLING OF SAFETY CONTROL AND CAUSE A "NO HEAT" CONDITION.

Furnace Width

FAN CONTROL / IGNITION MODULE