Twin City Fan Companies Centrifugal Fan BSI-120A

Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations and experienced with this type of equipment.

WARNING! Hazardous moving parts. Unit may contain protected fan motor, which may start automatically and cause injury. Allow time for reset. Disconnect power before servicing.

CAUTION! Sharp edges and screws are a potential injury hazard. Avoid them.

The standard pillow block bearings on belt driven fans are factory lubricated and are provided with external grease fittings.

Lubrication annually is recommended or more frequently if needed (see Greasing Intervals table).

It is recommended to add fresh grease at start-up. Use only 2 or 3 shots of a recommended lubricant with a hand gun in most cases (see Grease Manufacturers table).

Maximum hand gun rating 40 P.S.I. Rotate bearings during lubrication where good safety practice permits.

CAUTION! Greases of different soap bases (lithium, sodium, etc.) may not be compatible when mixed. Prevent such intermixing by completely purging the bearing of old greases.

The most frequent causes of bearing failure are not greasing often enough, using an excessive quantity of grease or using incompatible greases. Excessive vibration, especially if the bearing is not rotating, will also cause bearings to fail.

Warning: This procedure requires trained personnel with PPE!

Are the bearing set screws tight?

If screws are not tight, tighten them and report the issue to the maintenance team.

Is there any material build up on the impeller blades?

If material build up is found, clean the impeller blades and report the issue to the maintenance team.

Is there any sign of corrosion or erosion on the blade metal?

If corrosion or erosion is found, report the issue to the maintenance team.

Sign off on the bearing set screw check

Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations and experienced with this type of equipment.

WARNING! Hazardous moving parts. Unit may contain protected fan motor, which may start automatically and cause injury. Allow time for reset. Disconnect power before servicing.

CAUTION! Sharp edges and screws are a potential injury hazard. Avoid them.

Power is turned off and locked in the OFF position at the service entrance.

WARNING: Hazardous moving parts. Unit may contain protected fan motor, which may start automatically and cause injury. Allow time for reset. Disconnect power before servicing.

CAUTION: Sharp edges and screws are a potential injury hazard. Avoid them.

Routine maintenance should cover the following items:

All motors containing ball bearings are permanently lubricated from the factory. No additional maintenance is required.

Sign off on the fan maintenance

Warning: Hazardous moving parts. Unit may contain protected fan motor, which may start automatically and cause injury. Allow time for reset. Disconnect power before servicing.

Caution: Sharp edges and screws are a potential injury hazard. Avoid them.

Motor shaft spins freely and bearings run smoothly

Belt easily slipped over the sheave

Belt checked for glazing, cracks, ply separation or irregular wear

Sheaves checked for chipping, dents or rough surfaces

Correct belt tension maintained