Aaon Packaged Rooftop Unit RN-013

Ensure all necessary equipment and materials are available

Select the cleaning acid to use

Pump the cleaning liquid through the exchanger

Rinse the heat exchanger with clean water

Select the neutralizing solution to use before the last rinse

Set unit controls to cooling mode of operation with supply fans on

Is the fan operating in the correct direction?

Is the compressor operating correctly?

Is the compressor rotating correctly?

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.

Disconnect power to wheel drive motor

Remove belt from pulley and position temporarily around wheel rim

Loosen set screw in wheel drive pulley using a hex head wrench and remove pulley from motor drive shaft

While supporting weight of drive motor in one hand, loosen and remove (4) mounting bolts

Install replacement motor with hardware kit supplied

Install pulley to dimension as shown and secure set screw to drive shaft

Stretch belt over pulley and engage in groove

Verify that the motor is securely mounted

Aluminum Wheel Air Seals Inspection

Check the condition of the non-contact sealing on wheel peripheries and brush sealing middle beam

Are the non-contact seals free from being flipped, rolled, or pierced?

Aluminum Wheel Brush Plate Inspection

Inspect the condition of the brushes on both upper sides of the profiles

Do the brushes require replacement or repositioning?

Adjust the position of the brushes if necessary by unscrewing and placing them properly

Aluminum Wheel Purge Sector Inspection

Check the condition, rigidness, and cleanliness of the purge sectors