Aaon Packaged Rooftop Unit RN-070

Aluminum Wheel Drive Components Inspection

Inspect the drive belt for the following conditions

Does the belt show signs of mechanical damage?

Is the belt passing freely without encountering obstacles inside the housing?

Unclip the belt using pliers and remove the necessary segments to increase tension.

Connect the shortened belt ends by inserting the protruding tongue through the hole of the other half of the belt.

Use pliers to drag the segment tongue easier and twist it back to the starting position.

Inspect the Air Seals and Wheel Drive Components

Select the Class of Air for Cleaning Frequency

Clean the energy transfer media to maintain optimal performance

Verify the cleanliness of the Energy Recovery Wheel

Is the Energy Recovery Wheel operating at optimal performance?

Obtain access to the pulley side bearing access plate if bearing access plates are provided.

Remove two bearing access plate retaining screws and the access plate.

Using hexagonal wrench, loosen set screw in bearing locking collar.

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

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

Shut down operation of the unit

Close both shut-off valves to isolate the suction filter

Reclaim the refrigerant from the suction filter section

Remove the bolts from the suction filter end plate

Remove the pleated filter assembly

Replace the suction filter end plate and bolts

Ensure a trained, qualified service technician checks the unit.

Clean condenser coil at least once a year.

Is there debris or dirt/grease build-up requiring more frequent cleaning?

Follow proper cleaning procedure to avoid coil damage.

Document routine cleaning of microchannel coils with factory provided e-coating.

Aluminum Wheel Air Seals Inspection

Check condition and tightness of non-contact and brush seals.