Daikin Air Handler CAH004GVAM

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

CAUTION: For safety, stop rotating equipment before lubrication

Did you add one half of the recommended amount of lubricant?

Start bearing, and run for a few minutes

Did you stop the bearing and add the second half of the recommended amount of lubricant?

A temperature rise, sometimes 30°F (1°C) after lubrication is normal

Bearing should operate at temperature less than 200°F (94°C) and should not exceed 225 (107°C) for intermittent operation

CAUTION: For best results, specific applications should be monitored regularly and lubrication intervals and amounts adjusted accordingly

Any good quality lithium or lithium complex base grease, using mineral oil, conforming to NLGI grade 2 consistency, and an oil viscosity of 455-1135 SUS at 100°F (100-200 cSt at 40°C) may be used for re-lubrication

Compatibility of grease is critical. Lubricatable bearings are supplied with grease fittings or zerks for ease of lubrication with hand or automatic grease guns. Always wipe the fitting and grease nozzle clean

Freezing point of antifreeze solution

Remove and Replace Components of Coils

Power to the unit locked out and tagged out?

Fan assembly removed and replaced?

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

Upon completion of the air balance, 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

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

Setscrews D and capscrews E tightened