Greenheck Centrifugal Sidewall Exhaust Fan CW-085

Disconnect all electrical power to the fan and secure to the 'off' position.

Ensure the unit is made non-functional by removing fuses and locking off the disconnect.

Check for oil and dust accumulation on the wheel and housing.

Clean the wheel evenly to prevent imbalance and vibration.

Clean the housing to ensure smooth operation.

Is the wheel balanced after cleaning?

Inspection and Maintenance Record

Record inspection and maintenance performed

Check for moisture or dirt accumulations on parts

Describe the source of moisture or dirt if found

Rotate the wheel by hand (10 to 15 revolutions)

Disconnect and secure all electrical power to the fan to the 'off' position.

Fasteners and Setscrews Inspection

Check all fasteners and setscrews for tightness.

Does the wheel rotate freely and is it aligned as shown in Figure 5?

Is wheel position correct as preset from the factory?

Adjust wheel and inlet cone overlap by loosening the setscrews and moving the wheel to the desired position if necessary.

Loosen the setscrew holding the bushing and shaft key in place, if present.

Loosen and remove the socket head cap screws fastening the bushing to the hub.

Select the mounting type for socket head cap screws installation

Tighten the socket head cap screws an eighth of a turn at a time, alternating until the hub comes loose from the bushing.

Clean all surfaces of hub and bushing to remove any oil or residue.

Select the mounting style and perform the corresponding actions

Install the two bushing socket head cap screws into the aligned holes by hand until seated.

Lubrication Frequency Assessment

Select the type of service environment

Ensure the use of a good quality lithium base grease, NLGI Grade 2 consistency

Is the lubrication process completed successfully?

Check for any unusual conditions

Describe any unusual conditions observed