12
Blower Maintenance
Greenheck recommends these procedures to insure trouble free operation of this unit. See the furnace portion of
this manual and the furnace manual for maintenance of the furnace section.
A record of maintenance performed on this unit should be kept. This information will provide essential information
if problems are encountered. A section at the back of this manual is provided for recording the units maintenance
history.
CAUTION: When performing any maintenance on this unit, be sure that the power is disconnected and
cannot be accidentally turned on. The control center disconnect can be locked in the off position .
2 weeks after startup
Check belt tension
- Belts tend to stretch after a period of time.
They should be periodically checked for wear and tightness.
Approximately
3
/
8
" of deflection per ft. of span between
sheaves is standard for belt tightness.
When replacing belts,
use the same type as supplied with the unit. Matched belts should
always be used on units with multi groove pulleys.
Replacement of belts
- should be accomplished by loosening the
tensioning device to the point where the belts can be removed by
hand. Do not force belts on or off as this may cause breakage of
cords leading to premature belt failure. Belts should be adjusted as
above.
Every 3 Months
The filter in the unit should be inspected at least every 3 months.
Depending on the environment filters could require changing or
cleaning more or less often. The filters can be slid out of either side
of the unit.
If
washable filters
are installed, they can be washed in warm soapy water. An adhesive spray can be applied to
increase filter efficiency.
If
disposable filters
are installed, check by holding up to a light source. If light cannot pass through the filter, it
should be replaced. Replacement filters should be of the same manufacturer and size.
When reinstalling filters be sure to install with the airflow in the correct direction indicated on the filter and with
any factory spacers that came with the unit.
Yearly
All
bearings
are factory lubricated and require no further lubrication under normal use. Normal use being
considered -20°F to 180°F and in a relatively clean environment.
Motor
maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited
to the exterior surfaces only. Removing dust and grease buildup on motor housing assures proper motor cooling.
Greasing of motors is intended only when grease fittings are provided. Many fractional motors are permanently
lubricated and require no further lubrication. Motors supplied with grease fittings should be greased in
accordance with manufacturer's recommendations. When motor temperature does not exceed 104°F (40°C), the
grease should be replaced after 2000 hours of running time as a general rule.
Wheels
require very little attention when moving clean air. Occasionally oil and dust may accumulate on the
wheel causing imbalance. When this occurs the wheel and housing should be cleaned to assure smooth and safe
operation.
Routinely check all
fasteners
for tightness.
Belt Tension
Adjustment
Screw
Blower
Housing
Motor
R
o
ta
tio
n
Too Loose
Too Tight
