Daikin Air Handler OAH055GBAC

Warning: Moving belt and fan can cause severe personal injury or death. Always ensure safety measures are in place.

General Rules of Tensioning: The ideal tension is the lowest tension at which the belt does not slip under peak load conditions. Check tension frequently during the first 24 to 48 hours of operation. Over tensioning shortens belt and bearing life. Keep belts free from foreign material that can cause slippage. Inspect V-drive on a periodic basis. Adjust tension if the belt is slipping. Do not apply belt dressing. This can damage the belt and cause early failure.

Force applied to the belt tension checker

Does the measured force match the ideal values?

Is the belt free from foreign material that can cause slippage?

Are the belt and fan guards on plenum fan units always in place?

Is the fan locked and tagged out to prevent accidental start up?

Is the floor surface dry and free of oil or grease?

Remove and Replace Components of Coils

Fan shaft, motor, and any drive components removed?

Side panels and any intermediate supports removed?

Warning: This maintenance check requires trained personnel with PPE!

Drain pans in any air conditioning unit may have some moisture.

Algae, etc., can grow due to airborne spores and bacteria.

Periodic cleaning is necessary to prevent this buildup from plugging the drain and causing the drain pan to overflow.

Also, keep the drain pans clean to prevent the spread of disease.

Cleaning should be performed by qualified personnel.

Dirt and lint can clog the condensate drain, especially with dirty filters.

Inspect twice a year to help avoid overflow.

Sign off on the coil maintenance

WARNING: Personal Injury Hazard. Power supply can cause electrical shock. Always disconnect all power to unit before servicing

WARNING: UV-C exposure is harmful to the skin and eyes. Looking at an illuminated UV-C bulb can cause permanent blindness. UV-C skin exposure can cause cancer

WARNING: Fluorescent bulbs contain mercury, which can cause personal injury if breathed or ingested. Use appropriate protective gear to clean up broken bulbs

Verify the UV lights are off by using the view window

Disconnect power to the power receptacle before servicing

Verify the power is disconnected

Before opening the access panels, use the viewing window to make sure the UV lights are off

Before handling, allow bulbs to cool for 5 minutes

Grasp body of bulb firmly at each end

Check all moving parts for wear

Check bearing collar, sheave, and wheel hub setscrews, sheave capscrews, and bearing hold-down bolts for tightness

Annually check and snug all electrical connections

Inspect for signs of water damage such as corrosion and repair if necessary

Check ground conductor and connection integrity. Service if needed