Daikin Air Handler CAH019GVDM

Adjust motor base forward to release belt tension

Remove the belts for easier adjustment

Loosen, but do not remove both of the locking setscrews A in the outer locking ring by using a hex key or torque wrench with a hex bit

Adjust sheave to desired pitch diameter by turning the outer locking ring, using a spanner wrench or drift inserted into the three holes that are located 120° apart on the ring

Tighten BOTH locking screws A in the outer locking ring before operating the drive. Use a torque wrench and tighten to the value

Replace belts and adjust the motor base to tension the belts properly

Do not loosen any screws other than the two locking screws A in the outer locking ring when adjusting the sheave pitch. Do not operate the drive until the locking screws have been set to the torque specifications

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 in good condition?

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

Is the fan locked and tagged out to prevent accidental start up?

CAUTION: For safety, stop rotating equipment before lubrication

Equipment stopped for lubrication?

Enter the temperature of the bearing after lubrication

CAUTION: For best results, monitor specific applications regularly and adjust lubrication intervals and amounts accordingly

Type of grease used for lubrication

Compatibility of grease checked?

Lubrication interval based on RPM and temperature

Recommended Lubricants for Fan Shaft Ball Bearings

Sign off on the fan shaft bearings lubrication

WARNING: Mold can cause personal injury. Clean drain pan regularly so mold does not develop

Coils can freeze due to air stratification or failure of outdoor air dampers and/or preheat controls. Drain all coils as thoroughly as possible and then treat in the following manner

Fill each coil independently with an antifreeze solution using a small circulating pump and again thoroughly drain

Check freezing point of antifreeze before proceeding to next coil. Due to a small amount of water always remaining in each coil, there is a diluting effect. The small amount of antifreeze solution remaining in the coil must always be sufficient enough to prevent freeze-up

Remove and Replace Components of Coils

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

Remove the flat head fasteners located along the sides of the panel

Once all fasteners are removed, lift off the panel

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