Daikin Air Handler CAH040GDCC

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

CAUTION: Bearing overheating potential. Can damage the equipment. Do not over lubricate bearings. Use only a high grade mineral grease with a 200°F safe operating temperature.

NOTE: Direct-Drive Class Il fans that are supplied with TECO motors have double shielded bearings on frame sizes 140T-280T. These bearings are pre-packed with a long life grease and are not regreaseable. Larger frame size TECO motors are regreaseable and follow the same lubrication recommendations as all other motors

Upper and lower grease plugs removed and cleaned

Grease fitting inserted into the upper hole

Clean grease added with a low pressure gun

Motor run for five minutes before replacing the plugs

Did you clean the drain pan regularly to prevent mold development?

Did you fill each coil independently with an antifreeze solution using a small circulating pump and again thoroughly drain?

Did you check the freezing point of antifreeze before proceeding to the next coil?

Remove and Replace Components of Coils

Did you remove the flat head fasteners located along the sides of the panel?

Did you remove the frame channels that run the length of the unit along the top?

Did you remove the fan section?

Did you remove the fan assembly?

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 and correct if needed

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