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7.0 MAINTENANCE
For continuing high performance, and to minimize possible equipment failure, it is essen-
tial 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. Be sure to check the finned surface on the return side of the coil.
It may be necessary to remove the air-filter and use a mirror and flashlight to view the
return side of the coil.
NOTE: A proper filter is the best defense against a dirty coil.
choice, proper air flow and velocity also play a crucial role in how effective a filter will
be. Most filters will lose their effectiveness when face velocities exceed 300 - 400 feet
per minute. Excessive air velocity can allow particles to pass right through the media.
Additionally, loaded or restrictive filters may lose their shape in higher air velocity appli-
cations and allow unfiltered air to bypass the filter altogether around the sides.
IMPORTANT: Coil and Drainpan Cleaning Method
Clean the finned surface of the indoor coil by rinsing the coil from both sides with clean
warm water and/or with a vacuum with a soft brush attachment to remove accumulated
contaminants and lint. It is important not to allow the tool to damage or bend the fins.
Many chemical cleaners will attack the aluminum tubes which can cause refrigerant leaks.
Therefore, use only clean warm water for cleaning aluminum tube evaporator coils. Do
not use caustic household drain cleaners or bleach in the condensate pan or near the
indoor coil as they will damage the aluminum fins and tubes.
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, MOTOR, & BLOWER WHEEL
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.
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.
Regardless of the filter
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