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Greenheck recommends these procedures to insure trouble free operation of this unit. It is especially important to
maintain heater units for clean and efficient operation. Most unit failures can be attributed to poor setup or poor
maintenance.
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
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.
3
Approximately
⁄
8
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 multigroove pulleys.
Replacement of belts - should 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 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.
Yearly
Most bearings are permanently lubricated and require no further lubrication under normal use. Normal use being
considered -20°F to 120°F and in a relatively clean environment. Some bearings are re-lubricatable and will need
to be regreased depending on fan use. Check you bearings for grease zert to find out what type of bearing you
have. If your fan is not being operated under normal use, bearings should be checked monthly for lubrication.
Motor maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited
to the exterior surfaces only. Removing dust and grease build-up 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. 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.
10
10
MAINTENANCE
in. of deflection per ft. of span between
Belt Span
Deflection =
64
NOTE: For motors of 1 hp or less a smaller sliding base
bracket is used to attach to blower.
Belt Span
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