Aaon Packaged Rooftop Unit RNA-010-A-0-2-FAAA-00A

Inspection of Purge Sector Condition

Check the condition of the purge sector

Verify the rigidness of the purge sector

Measure the distance of the sector against the recovery wheel matrix

Is the distance within the acceptable range?

Use compressed air to clean the purge sector if required

Ensure availability of Simple Green (Part# T10701) from AAON Parts and Supply

Prepare a 4 to 1 solution of water and Simple Green

Rinse the coil completely with water using a hard spray

Ensure the spray is not too hard to avoid bending the fins

Application of Simple Green Solution

Fill a pump sprayer with the prepared Simple Green solution

Spray the air inlet face of the coil from the fan side

Select the areas applicable for this procedure

Inspect the energy recovery wheel for visible dirt and debris

Is the wheel free from any visible damage?

Inspect the belt for any visible wear or damage

Is the belt free from visible wear or damage?

Measure the current belt tension

Is the belt tension within the recommended range?

Does the belt require tension adjustment?

Adjust the belt tension if necessary

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.

Loosen set screw in bearing locking collar using hexagonal wrench.

Tap collar in the direction of wheel rotation to unlock collar using light hammer and drift.

Remove two nuts securing bearing housing to the bearing support beam using socket wrench with extension.

Was the bearing removable by hand?