Daikin Air Handler CAH012GDAM

CAUTION: Sharp fin edges are a potential injury hazard. Avoid contact with them

To obtain maximum performance, the coil must be clean

Check once a year under normal operating conditions and, if dirty, brush or vacuum clean.

Use a chemical coil cleaner on multiple row coils

Read and follow the chemical cleaner's instructions as some cleaners may contain harsh chemicals

Take care not to damage fins while cleaning.

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: This procedure requires trained personnel with PPE!

Belt tension slacked off if belts have been installed

Capscrews E loosened but not removed

NOTE: This key projects a small amount providing a grip for removing

Pitch diameter adjusted by opening or closing the movable flanges by half or full turns

NOTE: Two-groove sheaves are supplied with both grooves set at the same pitch diameter. To provide the same pitch diameter for satisfactory operation, move both movable flanges the same number of turns. Do not open sheaves more than five turns for A belts or six turns for B belts

Replace front load filter option

Filters removed and replaced from inside the unit

Filters fully seated in the frame after installation

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

Sign off on the filter maintenance

Warning: This maintenance check requires trained personnel!

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

Presence of algae or other growths 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 clogging the condensate drain, especially with dirty filters?

Inspect twice a year to help avoid overflow.

Sign off on the coil maintenance