Daikin Rooftop System MPS 050F

Ensure the motor is warm but not running.

Grease Plug Removal and Cleaning

Clean the upper and lower grease plugs.

Insert a grease fitting into the upper hole.

Add a small amount of clean grease with a low pressure gun.

Gain access to the energy recovery wheel

Remove segments from the energy recovery wheel

Brush foreign material from the face of the wheel

Prepare a 5% solution of non-acid based coil cleaner or alkaline detergent with warm water

Soak segments in the cleaning solution until grease and tar deposits are loosened

Rapidly run finger across surface of segment to separate polymer strips for better cleaning action

Rinse dirty solution from segment

Obtain access to the pulley side bearing access plate and remove two retaining screws.

Using a hexagonal wrench, loosen the screw in the bearing lock collar.

Using a light hammer and drift, tap collar in the direction of wheel rotation to unlock collar. Remove collar.

Using a socket wrench with extension, remove two nuts which secure bearing housing to the bearing support beam.

Using a wrench, remove the diameter seal retaining screws. Remove diameter seals from bearing beam.

Measure continuity through all fuses

Check that all electrical connections are tight

Check the resistance to ground for each circuit

Check the resistance phase to phase for each circuit

Confirm no further lubrication is necessary for the wheel drive motor bearings

Inspect the drive belt for proper tracking and tension

Check for visible slippage during start-up