29
MAINTENANCE
WARNING:
ELECTRICAL SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury, death or property
damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical
power to furnace.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
• Proper maintenance is most important to achieve the best
performance from a furnace. Follow these instructions for
years of safe, trouble free operation.
• These maintenance instructions are primarily intended
to assist qualified technicians experienced in the proper
maintenance and operation of this appliance.
• Always reinstall the doors on the furnace after servicing.
Do not operate the furnace without all doors and
covers in place.
• Verify the thermostat is properly installed and will not be
affected by drafts or heat from lamps or other appliances.
• To achieve the best performance and minimize equipment
failure it is recommended that a yearly maintenance
checkup be performed. At a minimum, this check should
include the following items:
Air Filter(s) -
Air filter(s) are not supplied with the furnace as
shipped from the factory. The installer must provide a high
velocity filter that is appropriately sized to the return air duct
opening or external filter rack.
WARNING:
Never operate the furnace without a filter in place.
Dust and lint can build up on internal components,
resulting in loss of efficiency, equipment damage,
and possible fire.
It is recommended that filter(s) be 1” or 2” thick and be
cleaned or replaced monthly.
Filters designed to remove smaller particles such as pollen,
may require additional maintenance. Filters for side return
and bottom return applications are available from most local
distributors.
Blower Compartment -
Dirt and lint can create excessive
loads on the motor resulting in higher than normal operating
temperatures and shortened service life. It is recommended
that the blower compartment be cleaned of dirt or lint that
may have accumulated in the compartment or on the blower
and motor as part of the annual inspection.
Cleaning of Burners -
If the burners must be cleaned, follow
1. Shut off gas supply to the furnace at the meter or at a
manual valve in the supply piping.
2. Turn off all power to the furnace and set the thermostat
to it’s lowest setting.
3. Remove the burner door from the furnace.
4. Turn the gas control switch to the OFF position.
5. Disconnect the wires from the gas valve, igniter, flame
sensor, and flame rollout switch.
CAUTION:
To prevent damage to the unit or internal
components, it is recommended that two
wrenches be used when loosening or tightening
nuts. Do not over tighten!
6. Using two wrenches, separate the ground-joint union in
the gas supply piping at the furnace.
7. Remove the piping between the Gas Valve and the ground-
joint union. (If applicable).
8. Remove all screws securing the Manifold Assembly to the
Burner Box.
9. Carefully remove the burner assembly from the furnace.
DO NOT DAMAGE THE IGNITER WHILE REMOVING
THE BURNER ASSEMBLY.
10. Inspect the burners for accumulated dust or debris. If
necessary carefully clean them with a soft wire brush and
a vacuum cleaner.
DO NOT DAMAGE THE IGNITER
WHILE CLEANING THE BURNER.
11. Replace all the parts in reverse order from which they
were removed.
12. Follow the lighting instructions found on the furnace door
to return the furnace to operation. Verify proper operation
after servicing.
Vent System -
Check the inlet pipe (if applicable) and outlet
pipe to ensure they are not blocked by debris. Any damaged
section of vent pipe must be replaced, and any obstruction
or blockage must be removed prior to operating the furnace.
Heat Exchanger & Burner Maintenance -
The furnace
should operate for many years without soot buildup in the
flue passageways, however, the flue, vent system, and
burners should be inspected and cleaned (if required) by a
qualified service technician annually to ensure continued safe
operation. Pay attention to any deterioration from corrosion
or other sources.
WARNING:
Holes in the vent pipe or heat exchanger can
cause combustion products to enter the home.
Replace the vent pipe or heat exchanger if leaks
are found. Failure to prevent the circulation of
combustion products into the living space can
create potentially hazardous conditions including
carbon monoxide poisoning that could result in
personal injury or death.
Lubrication -
The bearings in the blower motor and inducer
blower used in these furnaces are pre-lubricated and sealed
by the manufacturer. No further oiling of the bearings is
required for the life of the motor.
