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SCHEDULED MAINTENANCE
MAINTENANCE
WARNING
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in
dangerous operation, 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.
WARNING
HIGH VOLTAGE!
Disconnect all power before servicing
or installing this unit. Multiple power
sources may be present. Failure to do so
may cause property damage, personal
injury or death.
WARNING
To prevent personal injury or death due to improper
installation, adjustment, alteration, service or
maintenance, refer to this manual. For additional
assistance or information, consult a qualified installer,
servicer agency or the gas supplier.
CAUTION
Sheet metal parts, screws, clips and similar items
inherently have sharp edges, and it is necessary that the
installer and service personnel exercise caution.
Preventive maintenance is the best way to avoid
unnecessary expense and inconvenience. Have this
system inspected at regular intervals by qualified service
personnel, at least twice a year. Routine maintenance
should cover the following items:
1. Tighten all set screws, and wire connections.
2. Clean evaporator and condenser coils mechanically
or with cold water, if necessary. Usually any fouling
is only matted on the entering air face of the coil and
can be removed by brushing.
3. Replace filters as needed (see below).
4. Check for blockage of condensate drain.
5. Check power and control voltages.
6. Check running amperage.
7. Check operating temperatures and pressures.
8. Check and adjust temperature and pressure controls.
9. Check and adjust damper linkages.
10. Check operation of all safety controls.
11. Examine gas furnaces (see below and the User’s
Information Manual).
12. Check condenser fans and tighten set screws.
Filters
CAUTION
To prevent property damage due to fire and loss of
equipment efficiency or equipment damage due to dust
and lint build up on internal parts, never operate unit
without an air filter installed in the return air system.
Every application may require a different frequency of
replacement of dirty filters. Filters must be replaced at
least every three (3) months during operating seasons.
Dirty filters are the most common cause of inadequate
heating or cooling performance. Filter inspection should be
made at least every two months; more often if necessary
because of local conditions and usage.
Dirty throwaway filters should be discarded and replaced
with a new, clean filter.
Disposable return air filters are supplied with this unit. See
the unit Specification Sheet or Technical Manual for the
correct size and part number. To remove the filters, remove
the filter access panel on return side of the unit.
Cabinet Finish Maintenance
Use a fine grade automotive wax on the cabinet finish to
maintain the finish’s original high luster. This is especially
important in installations with extended periods of direct
sunlight.
Clean Outside Coil (Qualified Servicer Only)
The coil with the outside air flowing over it should be
inspected annually and cleaned as frequently as necessary
to keep the finned areas free of lint, hair and debris.
Condenser And Induced Draft Motors
Bearings on the condenser fan motors and the combustion
fan motor are permanently lubricated. No additional oiling
is required.
Summary of Contents for DRG0361DL00001S
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