Baltimore Aircoil Company Cooling Tower 3482C

Inspect general condition of the unit and check unit for unusual noise or vibration.

When operating in ambient temperatures below freezing, the unit should be inspected more frequently.

Ensure all controls for capacity and freeze protection are set properly and functioning normally.

Prevent excessively high water levels and possible overflow of the cold water basin due to over pumping, clogged strainers, or make-up valve malfunction.

Resolve any icing conditions that may damage the unit or the supports, impair the system performance, or create a safety hazard.

Inspect air intake louvers/Combined inlet shields

Check and adjust water level in cold water basin

Check operation of make-up valve

Inspect and clean as necessary:

· Inspect general condition of the unit and check unit for unusual noise or vibration

· Inspect cold and hot water basins

· Flush water distribution system/Inspect spray nozzles

· Inspect air intake louvers/Combined inlet shields

· Check and adjust water level in cold water basin

· Check operation of make-up valve

Inspect and clean as necessary:

– Check the drive alignment annually to ensure maximum belt life.

– Place a straight edge across the driver and the driven sheaves as shown in Figure 4a for standard drives and in Figure 4b for the BALTIGUARD™ Fan System or the BALTIGUARD PLUS™ Fan System.

– The straight edge should contact all four points as shown in Figure 4a indicating that the drives are properly aligned.

– There should be no more than 1/16” deviation from the four points of contact.

– In case of realignment, loosen the motor sheave, and align it with the fan sheave. Allow 1/4” for draw-up as the bushing screw is retightened.

Warning: Ensure that the fans and pumps are disconnected, locked out, and tagged out before performing any service.

Are the two pillow block ball bearings supporting the fan shaft present?

Is each bearing equipped with a lubrication fitting and a slinger/locking collar to keep out moisture?

Select the type of grease used for lubrication

Was the lubrication done with a manual grease gun or BAC’s optional Automatic Bearing Greaser?

Was high-pressure grease gun avoided to prevent rupturing the bearing seals?

Sign off on the fan shaft bearings lubrication

Inspect and clean as necessary:

· Inspect cold and hot water basins

· Flush water distribution system/Inspect spray nozzles

– Loosen the lock nut on the motor base adjusting screw.

– Turn the motor base adjusting screw clockwise to tension the belt or counterclockwise to relieve belt tension. During adjustment of the belt tension, rotate the drives several times by hand to evenly distribute the tension throughout the belt.

– When the belt is properly tensioned, retighten the locking nut on the motor base adjusting screw.

· Lubricate motor base adjusting screw

· Check motor voltage and current