ROUTINE MAINTENANCE
CAUTION: See **WARNING** on Page 1 and 11
Once the unit has been put into operation, a periodic maintenance program should be set up to preserve the reliability and performance. Items to be included in this program are:
•BELTS
•MOTORS
•WHEEL AND FASTENERS
•VIBRATION
•FILTER MAINTENANCE
•COIL MAINTENANCE
•ENERGY WHEEL CASSETTE
FAN BELTS
Belts tend to stretch after a period of time. They should be periodically checked for tension and wear. When replacing belts, use the same type as supplied with the unit.
Replacement of belts should be accomplished by loosening the motor slide plate so the belts may be removed by hand. Do not force belts on or off as this may cause breakage of cords and lead to premature belt failure.
Belt tension should be adjusted to allow 1/64 in. of belt deflection per 1 in. of belt span. For example, a 16 in. belt span should have 16/64 in. or 1/4 in. of deflection with moderate thumb pressure at
Belt Span
Deflection = Belt Span 64
FIGURE 18
MOTORS
Motor maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited to exterior surfaces only. Removing dust and grease
Greasing of motors is intended only when fittings are provided. Many fractional horsepower motors are permanently lubricated for life and require no further lubrication. Motors supplied with grease fittings should be greased in accordance with the manufacturer’s recommendations.
WHEEL AND FASTENERS
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, bearings, drive, motor base and accessories for tightness. A proper maintenance program will help preserve the performance and reliability designed into the fan.
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