Daikin Air Handling Unit OAH090GHAM

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?

Did you start bearing, and run for a few minutes?

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

Enter the temperature rise after re-lubrication

Is bearing operating at temperature less than 200°F (94°C)?

Is bearing not exceeding 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.

All electrical connections checked and snug

Signs of water damage such as corrosion inspected

Water damage repaired if necessary

Sign off on the electrical system 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

If dirty, proceed with the following steps

Use a chemical coil cleaner on multiple row coils

Read and follow the chemical cleaner’s instructions

Warning: Some cleaners may contain harsh chemicals

Ensure fins are not damaged while cleaning

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 for more details

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