Daikin Air Handling Unit OAH003GHAM

Before servicing lock out and tag out all power to the unit

Fans or belts cause severe personal injury or death

Do not open the hinged access door and screw-fastened 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

A matching fixed sheave provides longer belt and bearing life and minimizes vibration

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.

Fan Shaft Bearings CAUTION: For safety, stop rotating equipment.

Did you add one half of the recommended amount shown in Table 43?

Start bearing, and run for a few minutes.

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

A temperature rise, sometimes 30°F (1°C), after re-lubrication is normal. Bearing should operate at temperature less than 200°F (94°C). Bearing should not exceed 225°F (107°C) for intermittent operation.

For a re-lubrication schedule, see Table 44. For applications that are not in the range of the table, contact Daikin Applied.

CAUTION: The tables state general lubrication recommendations and are intended as suggested or starting points only. 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 may be used for re-lubrication. Grease must conform to NLGI grade 2 consistency. Oil viscosity must be 455-1135 SUS at 100°F (100-200 cSt at 40°C). Compatibility of grease is critical.

All electrical connections checked and snug

Signs of water damage such as corrosion inspected

Was there any need for repair due to water damage?

Ground conductor and connection integrity checked

Was there any need for service?

Sign off on the electrical system check

Warning: Disconnect and lock electrical power source before starting the procedure.

Check tightness of all bearing, wheel, and sheave setscrews (or capscrews). Refer to Table 28 on page 42.

Recheck belt tension and adjust if necessary. Belts that are tensioned sufficiently to slip one to two seconds at startup perform satisfactorily, extending life and reducing vibration.

If re-tensioning is necessary, be certain to retain sheave alignment.

Sign off on the 48 Hours Air Handling Unit Check

Removing and Replacing Components

Before removing component, lock out and tag out all power to the unit

Fans and belts can cause severe personal injury or death

See page 12 for instructions on removing panels and opening fan access doors to remove or replace components

The fan shaft, motor, and any drive components can be removed and replaced through the access door opening

If required, the side panel can be removed for additional access

If fan replacement is required, the entire fan assembly can be pulled out the side of the cabinet for housed fan assemblies