Daikin Air Handler OAH034GDGM

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?

Measure the force applied to the belt tension checker

Does the measured force match the required values?

Is the belt free from foreign material that can cause slippage?

Is the V-drive inspected and adjusted if necessary?

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?

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

CAUTION: For safety, stop rotating equipment before lubrication

Equipment stopped for lubrication?

Enter the temperature after lubrication

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

Type of grease used for lubrication

Compatibility of grease checked?

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 after air balance

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

Coil is clean for maximum performance

Coil checked once a year under normal operating conditions

If coil is dirty, it has been brushed or vacuum cleaned

Chemical coil cleaner used on multiple row coils

Instructions of the chemical cleaner have been read and followed

Fins are not damaged while cleaning

Sign off on the coil maintenance