3
person’s hand during grounding will be satisfactorily dis-
charged.
3. After touching the chassis, you may proceed to service the
control or connecting wires as long as you do nothing that
recharges your body with static electricity (for example; DO
NOT move or shuffle your feet, DO NOT touch ungroun-
ded objects, etc.).
4. If you touch ungrounded objects (recharge your body with
static electricity), firmly touch furnace again before touch-
ing control or wires.
5. Use this procedure for installed and uninstalled (ungroun-
ded) furnaces.
6. Before removing a new control from its container, discharge
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 con-
trol or yourself into contact with the furnace. Put all used
AND new controls into containers before touching un-
grounded 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.
Consult your local dealer for maintenance and maintenance
contract availability.
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 operating
instructions on the label attached to the furnace.
!
WARNING
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 an-
nually.
6. Check burners for cleanliness annually.
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, gloves, and safety glasses when
removing parts.
CAUTION
!
Step 1 — Cleaning and/or Replacing Air Filter
The air filter arrangement may vary depending on the application
or orientation. See Table 1 or 2 for filter size and type.
FILTER
FILTER
SUPPORT
FILTER
RETAINER
A08586
Fig. 3 -- Bottom Filter Arrangement
FILTER
RETAINER
FILTER
A08587
Fig. 4 -- Filter Installed for Side Inlet
FIRE, CARBON MONOXIDE POISONING
HAZARD
Failure to follow this warning could result in personal injury,
death or property damage.
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.
!
WARNING
NOTE
: If the filter has an airflow direction arrow, the arrow must
point toward the blower.
To clean or replace filters, proceed as follows:
If filter is installed in filter cabinet adjacent to furnace:
340AA
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