37
6.0 MAINTENANCE
For continuing high performance, and to minimize possible equipment failures, it is
essential that periodic maintenance be performance on this equipment. This section
provides general guidelines on what items require periodic maintenance and the recom-
mended frequency for maintenance.
6.1 AIR-FILTERS
Check the system filter every 30-90 days or as often as found to be necessary depend-
ing on the application. Clean or replace filters if found to be obstructed. New filters are
available from a local distributor or industrial supply store.
A qualified installer, service agency or HVAC professional should change the filters or
instruct the building owner’s maintenance personnel on how to access and change/
clean the filters and how often this maintenance must should be performed.
IMPORTANT:
Do not operate the system without a filter in place as this will result in lint
and contaminants accumulating on the coil resulting in reduced performance and possi-
ble icing of the coil.
6.2 COIL, DRAIN PAN, DRAIN LINE
Inspect the indoor coil, drain pan, and drain line once each year for cleanliness and
clean as necessary. Remove the filters and check the return side of the coil for lint and
contaminants and flashlight.
IMPORTANT:
Do not use caustic household drain cleaners with bleach in the conden-
sate pan or near the indoor coil. Drain cleaners will quickly damage the indoor coil and
condensate pan.
6.3 BLOWER LUBRICATION & CLEANING
The ball bearing motor is pre-lubricated and does not require the addition of grease
at time of installation. However, periodic cleaning out and renewing the grease in ball
bearings may be necessary. Please note that extreme care must be exercised to pre-
vent foreign matter from entering the bearing.
Over time, dust and contaminants may collect on the motor, especially if the air-filters
have not been replaced or cleaned on a regular basis. The motor should be inspected
annually and the exterior surface should be cleaned as needed and the air vents vacu-
umed out to remove any obstruction.
6.4 BLOWER SHAFT BEARINGS, BEARING COLLAR SET SCREWS,
BLOWER WHEEL, SHEAVES, & BLOWER DRIVE BELT(S)
Inspection of the blower shaft bearings, bearing collar set screws, blower wheel, and the
blower drive belt(s) is recommended every 6 months. Check bearing-collar set screws
on the blower shaft to make sure they are still tight. Check the blower shaft bearings
for smooth operation and lubricate or replace bearings if necessary. Inspect the blower
wheel for accumulation of lint and contaminants or damage. Remove blower wheel and
clean or replace if necessary. Inspect the motor and blower sheaves for excessive wear
or damage and check set-screws or D bushing bolts for tightness. Replace sheaves
and tighten screws and bolts as necessary. Check alignment of sheaves and adjust if
necessary. Inspect the blower drive belt(s) for wear and proper tension. Replace the
belt(s) and re-adjust the tension if necessary.
6.5 MOTOR REPLACEMENT
Only replace the blower motor with one with the equivalent voltage, horsepower rating,
amp rating, and NEMA frame size to maintain factory performance and reliability.
6.6 REPLACEMENT PARTS
Any replacement part used to replace parts originally supplied on equipment must be
the same as or an approved alternate to the original part supplied. The manufacturer will
not be responsible for replacement parts not designed to physically fit or operate within
the design parameters the original parts were selected for.
These parts include but are not limited to: Heater controls, heater limit controls, heater
elements, motor, motor capacitor, blower contactor, blower wheel, indoor coil, sheaves,
blower shaft, bearings, and sheet metal parts.
When ordering replacement parts, it is necessary to order by part number and include
with the order the complete model number and serial number from the unit data plate.
(See Parts List for unit component part numbers).
