Daikin Air Handler CAH010GBAM

Filters removed from inside the unit

Wire clips rotated to release filters

Clean filters fully seated in the frame

Pressure drop for installed filters

Typical filter pressure drop for clean filters at rated air flow

Final pressure drop for front loaded filters

Prefilters removed to check the pressure drop of the final filters

WARNING: Before servicing fans, lock out and tag out all power to the unit. Fans or belts can cause severe personal injury or death

WARNING: Do not open the hinged access door and screw-fastenerd access panels while the unit is operating. Moving parts and strong suction forces can cause severe personal injury or death

Replace the variable pitched motor sheave with a properly sized, fixed sheave

Replace the adjustable sheaves with fixed sheaves

Measure the diameter of the V-belt outer surface where it passes around the sheave (pitch diameter)

Calculate fan speed from the motor nameplate rpm

Sign off on the fan drive 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

Warning: This maintenance check requires trained personnel!

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

Is the belt tension at the lowest tension at which the belt does not slip under peak load conditions?

Enter the belt span measurement

Enter the force applied to the belt tension checker

Does the force applied match the required values?

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

Is the V-drive inspected and adjusted if necessary?

Warning: Do not apply belt dressing. This can damage the belt and cause early failure.

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