5. Use this procedure for installed and uninstalled (un-
grounded) furnaces.
6. Before removing a new control from its container, dis-
charge your body’s electrostatic charge to ground to protect
the control from damage. If the control is to be installed in
a furnace, follow items 1 through 5 before bringing the
control or yourself into contact with the furnace. Put all
used AND new controls into containers before touching
ungrounded objects.
7. An ESD service kit (available from commercial sources)
may also be used to prevent ESD damage.
CARE AND MAINTENANCE
For continuing high performance and to minimize possible furnace
failure, it is essential that maintenance be performed annually on
this equipment. Consult your local dealer about proper mainte-
nance and maintenance contract availability.
WARNING:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Turn off the gas and electrical supplies to the unit before
performing any maintenance or service. Follow the oper-
ating instructions on the label attached to the furnace.
The minimum maintenance that should be performed on this
equipment is as follows:
1. Check and clean or replace air filter each month as needed.
2. Check blower motor and wheel for cleanliness annually.
3. Check electrical connections for tightness and controls for
proper operation each heating season. Service as necessary.
4. Check for proper condensate drainage. Clean as necessary.
5. Check for blockages in combustion-air and vent pipes
annually.
6. Check burners for cleanliness annually.
CAUTION:
CUT HAZARD
Failure to follow this caution may result in personal
injury.
Be careful of sharp metal edges, etc. Use care and wear
protective clothing safety glasses, and gloves when re-
moving parts.
I.
CLEANING AND/OR REPLACING AIR FILTER
The air filter arrangement may vary depending on the application
or orientation.
WARNING:
FIRE, CARBON MONOXIDE AND
POISONING HAZARD
Failure to follow this warning could result in a fire,
personal injury, or death.
Never operate unit without a filter or with the blower
access panel removed. Operating a unit without a filter or
with the blower access door removed could cause damage
to the furnace blower motor. Dust and lint on internal
parts of furnace can cause a loss of efficiency
NOTE:
If the filter has cross-mesh binding, the binding must face
the blower. If the filter has an air direction arrow, the arrow must
point toward the blower.
To clean or replace the filters, proceed as follows:
1. Turn off electrical supply to furnace.
2. Remove main furnace door and blower access panel.
3. Release filter retainer wire. (See Fig. 3 or 4.)
4. Slide filter out of furnace.
5. Furnaces are equipped with permanent, washable filter(s).
Clean filter by spraying cold tap water through filter in
opposite direction of airflow.
6. Rinse filter and let dry. Oiling or coating of filter is not
recommended.
7. Slide filter into furnace.
8. Recapture filter retainer wire.
9. Replace blower access panel and main furnace door.
10. Turn on electrical supply to furnace.
WASHABLE
FILTER
FILTER
SUPPORT
FILTER
RETAINER
A93046
Fig. 3—Bottom Filter Arrangement
FILTER
RETAINER
WASHABLE
FILTER
A93045
Fig. 4—Filter Installed for Side Inlet
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