Fan Maintenance
Greenheck recommends these procedures to ensure
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 unit’s maintenance history.
CAUTION
When performing any maintenance on this unit, be certain the power is disconnected and cannot be accidentally turned on. The control center disconnect can be locked in the off position.
Two Weeks after Start-Up
Belts - Belts tend to stretch after a period of |
| ||||
time. They should be |
|
|
|
| |
|
|
|
| ||
periodically checked |
|
|
|
| |
|
|
|
| ||
|
|
|
| ||
for wear and tightness. |
|
|
|
| |
Approximately 3/8 inch | Deflection = Belt Span | Belt Span | |||
of deflection per ft. | 64 |
|
| ||
|
|
|
| ||
of span between |
|
|
|
| |
sheaves is standard for |
|
|
|
| |
belt tightness. When |
|
|
|
| |
|
|
|
| ||
|
|
|
| ||
replacing belts, use the |
|
|
|
| |
same type as supplied | NOTE: For motors of 1 hp or less a | ||||
with the unit. Matched | smaller sliding base bracket | ||||
is used to attach to blower. | |||||
belts should always be | |||||
|
|
|
| ||
|
|
|
| ||
used on units with |
| ||||
If adjustments are made, it is very important to check the pulleys for proper alignment. Misaligned pulleys lead to excessive belt wear, vibration, noise and power loss.
CORRECT | WRONG | WRONG | WRONG |
Belt Alignment
Replacement of belts can be accomplished by loosening the motor 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 Three (3) Months
Filters - The filter in the unit should be inspected at least every three (3) months. Depending on the environment, filters could require changing or cleaning more or less often. The filters can be slid out of the coil connection 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.
Yearly
Bearings — Most bearings are permanently lubricated and require no further lubrication under normal use. Normal use being considered
Motors — 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 104ºF (40ºC), the grease should be replaced after 2000 hours of running time as a general rule.
Wheels — 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. Inspect fan impeller and housing for fatigue, corrosion or wear.
Routinely check all fasteners, set screws and locking collars on the fan, bearing, drive, motor base and accessories for tightness.
16 Model MSCF Modular Small Cabinet Fan
®