Greenheck Fan LBP, Series L Models LB manual Belt/Bearing Maintenance, Deflection= Belt Span

Deflection= Belt Span	Belt Span
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10.The adjustable motor pulley is factory set for the RPM specified. Speed can be increased by closing or decreased by opening the adjustable motor sheave.

11.Two groove variable pitch pulleys must be adjusted an equal number of turns open or closed.

12.Any increase in speed represents a substantial increase in the horsepower required by a unit.

13.Motor amperage should always be checked to avoid serious damage to the motor when speed is varied.

IMPORTANT

Adjust (tighten) belt tension after the first 24-48 hours of operation.

Maintenance

Motor maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited to exterior surfaces only. Removing dust buildup on motor housing ensures proper motor cooling.

Greasing of motors is only intended when fittings are provided. Many fractional hp motors are permanently lubricated and should not be lubricated further. Motors supplied with grease fittings should be greased in accordance with manufacturers’ recommendations. Where motor temperatures do not exceed 104ºF (40ºC), 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 causing imbalance. When this occurs, the wheel and housing should be cleaned to ensure smooth and safe operation.

All fasteners should be checked for tightness each time maintenance checks are performed prior to restarting unit.

A proper maintenance program will help these units deliver years of dependable service.

WARNING

Always disconnect, lock and tag power source before servicing. Failure to disconnect power source can result in fire, shock or serious injury.

WARNING

Uneven cleaning of the wheel will produce an out of balance condition that will cause vibration in the fan.

WARNING

This unit should be made non-functional when cleaning the wheel or housing (fuses removed, disconnect locked off).

Belt/Bearing Maintenance

1.Belts tend to stretch after a period of time. They should be checked periodically for wear and tightness. When replacing belts, use the same type as supplied with the unit.

2.Matched belts should always be used on units with multi-groove pulleys.

3.For belt replacement, loosen the tensioning device far enough to allow removal of the belt by hand. Do not force belts on or off. This may cause cords to break, leading to premature belt failure.

4.Once installed, adjust belts as shown in “Pre- Starting Checks.”

5.Shaft bearings can be classified in two groups: relubricating and non-relubricating. All bearings are factory lubricated and require no further lubrication under normal use (between -20ºF and 180ºF (-29° to 82°C) in a relatively clean environment).

6.Units installed in hot, humid or dirty locations should be equipped with special bearings. These bearings will require frequent lubrication. Caution should be employed to prevent overpacking or contamination.

7.Grease fittings should be wiped clean. The unit should be in operation while lubricating. Extreme care should be used around moving parts.

8.Grease should be pumped in very slowly until a slight bead forms around the seal. A high-grade lithium base grease is recommended.

9.Direct drive units require little maintenance except for cleaning, wheel alignment, and oiling according to motor label instructions.

Series L: Models LB, LBP, LD, and LDP

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