Aaon Packaged Rooftop Unit RN-010

Suction Filter Removal Instructions

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

Suction Filter Replacement and Reassembly

Replace the suction filter end plate and bolts

Evacuate the suction filter assembly to 300 microns

Gain access to 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

Wash the segments or small wheels in the prepared solution

Ensure solution temperature does not exceed 76.7°C (170°F)

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

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?

Ensure the bearing is at normal operating temperature but not running

Add grease to purge the seals (do not over-lubricate)

Select the grease used for re-lubrication

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 and their adherence to the wheel matrix surface

Do the brushes require replacement or repositioning?

Adjust the position of the brushes if necessary

Aluminum Wheel Purge Sector Inspection

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