Daikin Air Handling Unit OAH015GHAM

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.

Add one half of the recommended amount shown in Table 43

Start bearing, and run for a few minutes

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.

If the coil is dirty, proceed with the following steps

Use a chemical coil cleaner on multiple row coils

Read and followed the chemical cleaner’s instructions

Warning: Some cleaners may contain harsh chemicals

Ensure fins are not damaged while cleaning

All electrical connections checked and snug

Signs of water damage such as corrosion inspected

Ground conductor and connection integrity checked

Sign off on the electrical system check

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.

Motor Bearings: Supply and return fans—Supply and return fan motors should have grease added after every 2000 hours of operation.

Using the following procedure, re-lubricate the bearings while the motor is warm, but not running.

NOTE: Direct Drive Class II 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 re-greaseable. Larger frame size TECO motors are re-greaseable and follow the same lubrication recommendations as all other motors.

NOTE: Specific greasing instructions are located on a tag attached to the motor. If special lubrication instructions are on the motor, they supersede all other instructions.

Table 43: Recommended Lubricants and Amounts for Fan Motor Bearings

NEMA Size 56 to 140: Amount to Add (oz.)

NEMA Size 140: Amount to Add (oz.)

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