User Manual

9
UNIT MAINTENANCE
WARNING:
Never perform maintenance on energized or rotating
equipment. Always disconnect electrical power and
allow all rotating equipment to stop before servicing
the unit. Failure to do so may result in personal
injury, loss of limb, or death from electrical shock
or entanglement in moving parts.
The maintenance information listed below should be
performed in accordance with the Maintenance Schedule
shown in Figure 9 (page 16).
Filters - To clean permanent filters, remove the filters and
wash gently with mild soap and water. Rinse in clean, hot
water and allow to drain & dry thoroughly before reinstalling.
Drain Pan - The drain pan and the drain lines should be
cleaned to allow condensate to drain properly. Remove
any accumulation of residue or sludge from the drain
pan. Inspect in and around the drain pan for rust, holes,
and leaks.
V-Belts - Inspect for cracks, tears, and excessive or
abnormal wear. V-belts tend to elongate over time with
normal application and use. Ensure the belt always
maintains adequate tension without over tightening. Belts
which have been over tightened will wear out rapidly and
may cause motor and blower bearings to receive undue
strain and wear. As a result the unit could experience
excessive vibration and noise problems.
Blower Bearings - The blower assembly incorporates
sealed bearings. Under normal operating conditions, no
maintenance is necessary for the life of the equipment.
Blower Fan Wheel - Inspect the blower wheel blades
for accumulations of dirt and clean if necessary. Inspect
mounting nut for tightness when done.
Blower Motor & Assembly - Inspect the blower assembly
and motor mounting brackets for tightness and corrosion.
Correct deficiencies if neccessary. The blower motor
contains sealed bearings and under normal operating
conditions, no maintenance is necessary for the life of
the equipment.
Center Distance
Figure 3. Pulley Alignment
Span Length, t
Deflection (def)
Force
Figure 4. Tensioning V-Belts
Figure 2. V-Belt Alignment