Daikin Air Handling Unit OAH025GHAM

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: 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

Sign off on the lubrication procedure

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.

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.

Do not depend on routine draining of water cooling coils for winter shutdown as insurance against freeze-up. Severe coil damage can result.

Drain all coils as thoroughly as possible.

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 concentrated enough to prevent freeze-up.

NOTE: Carefully read instructions for mixing antifreeze solution used. Some products have a higher freezing point in their natural state when mixed with water.

Daikin Applied is not responsible for the freezing of coils.

Warning: Cleaning should be performed by qualified personnel

If the drain pan is overflowing, report the issue to the maintenance team and stop the procedure

Drain pan cleaned successfully?

Upload a photo of the cleaned drain pan

Sign off on the drain pan cleaning

Warning: Ensure the unit is turned off before starting the procedure

Filters removed from inside the unit

Prefilter and final filter released

Filters fully seated in the frame