Daikin Daikin Air Handler CAH019GVDM CAH019GVDM

Loosen setscrews B and C in moving parts of sheave and pull out external key E

Adjust sheave pitch diameter for desired speed, open moving parts by half or full turns from closed position

Replace external key E and securely tighten setscrews B over key and setscrews C into keyway in fixed half of the sheave

Put on belts and adjust tension

Make future adjustments by loosening the belt tension and increasing or decreasing the pitch diameter of the sheave by half or full turns as required

Adjust both halves of the two-groove sheaves by the same number of turns from closed position to provide the same pitch diameter

Verify that all keys are in place and that all se screws are tight before starting drive

Check setscrews and belt tension after 24 hours service

Sign off on the Pitch Key Sheave Maintenance

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

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

Motor bearings and ball bearings lubricated

Select the type of lubricant used

Amount of lubricant used (in oz)

Upper and lower grease plugs removed and cleaned

Clean grease added with a low pressure gun

Motor run for five minutes before replacing the plugs

Sign off on the motor bearings lubrication

Belt tension slacked off if belts have been installed

Capscrews E loosened but not removed

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

Setscrews D and capscrews E tightened

Belt tension readjusted if belts have been installed, or belts installed and tension adjusted if not previously installed

All keys are in place and all setscrews and all capscrews are tight before starting the drive

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.