48
7.0 MAINTENANCE
For continuing high performance, and to minimize possible equipment failure, it is
essential that periodic maintenance be performed on this equipment. Consult your local
dealer as to the proper frequency of maintenance and the availability of a maintenance
contract.
IMPORTANT:
Before performing any service or maintenance procedures, see the
“Safety Information” (Section 1.0) at the front of this manual.
7.1 AIR FILTER
Check the system filter every ninety days or as often as found to be necessary and if
obstructed, clean or replace at once.
A qualified installer, service agency or HVAC professional should instruct the homeown-
er on how to access filters for regular maintenance.
IMPORTANT:
Do not operate the system without a filter in place.
• New filters are available from a local distributor or home supply retailer.
7.2 INDOOR COIL, DRAIN PAN, DRAIN LINE
Inspect the indoor coil, drain pan, and drain line once each year for cleanliness and
clean as necessary. In some cases, it may be necessary to remove the filter and check
the return side of the coil with a mirror and flashlight.
IMPORTANT:
Do not use caustic household drain cleaners, such as bleach, in the con-
densate pan or near the indoor coil. Drain cleaners will quickly damage the indoor coil.
7.3 BLOWER MOTOR AND WHEEL
Inspect the blower motor and wheel for cleanliness. It should be several years before it
would become necessary to clean the blower motor and wheel.
• If it becomes necessary to remove the blower assembly from the unit, see instructions on
removal and replacement of motor, blower, and blower wheel in Sections 7.5-7.7 below.
• The blower motor and wheel may be cleaned by using a vacuum with a soft brush
attachment. Remove grease with a mild solvent such as hot water and detergent. Be
careful not to disturb the balance weights (clips) on the blower wheel blades. Do not
drop or bend wheel as balance will be affected.
7.4 MOTOR LUBRICATION
The blower motor sleeve bearings are pre-lubricated by the motor manufacturer and do
not have oiling ports. Motor should operate for an indefinite period of time without addi-
tional lubrication.
7.5 BLOWER ASSEMBLY REMOVAL & REPLACEMENT
Removing the blower assembly is not normally required for normal service and mainte-
nance. Removal is necessary for replacement of defective parts such as motor, blower
wheel. After extended use, removal of the blower assembly may become necessary for
a thorough cleaning of the blower motor and wheel.
• Mark field power supply wiring (for replacement) attached to terminal block or circuit
breaker(s) on blower assembly. Remove wiring from terminal block or circuit breaker(s).
• Mark low voltage control wiring (for replacement) where attached to unit control pig-
tails on right side of blower housing. Remove wire nuts attaching field control wiring to
unit control pigtails.
• Remove 4 screws holding blower assembly to front channel of cabinet and pull blower
assembly from cabinet.
• To replace blower assembly, slide blower assembly into blower deck. Make sure
blower assembly engages lances in deck properly. If assembly hangs up, check to
make sure top and bottom are lined up in proper locations.
!
WARNING
If removal of the blower assembly is required, all disconnect switches supply-
ing power to the equipment must be de-energized and locked (if not in sight of
unit) so the field power wires can be safely removed from the blower assembly.
Failure to do so can cause electrical shock resulting in personal injury or death.
!
WARNING
Units with circuit breaker(s) meet requirements as a service disconnect
switch, however, if access is required to the line side (covered) of the circuit
breaker, this side of the breaker(s) will be energized with the breaker(s) de-
energized. Contact with the line side can cause electrical shock resulting in
personal injury or death.