Aaon Packaged Rooftop Unit RNA-050-D-0-3-KAAT-00A

Rinse the coil completely with water.

Use a hard spray but be careful not to bend or damage the fins.

Spray from the fan side of the coil.

Spray and rinse the coil from the face.

Is the water pressure below 689.5 kpa (100 psi)?

Is the nozzle 15.25 centimeters (6 in.) and perpendicular to the coil face?

Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts

Inspect blower wheels and bands for excessive dust build up

Is cleaning required due to dust build up?

Clean blower wheels and bands if required

Is the fan free from excessive dust build up after cleaning?

Restore electrical power to the unit

Ensure the unit is turned off before starting

Shut off all electrical power to the unit to avoid shock hazard or injury from rotating parts

Select the appropriate chemical cleaner

Ensure water pressure does not exceed 689.5 kpa (100 psi)

Maintain a minimum distance of 15.25 centimeters (6 inches) from the coils while cleaning

Is the water aimed perpendicular to the coils?

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?

Gain access to the aluminum energy recovery wheel

Remove the energy recovery wheel from the unit

Remove small foreign materials using one of the following methods

Use compressed air at a distance of at least 0.08 m (2 ft) from the wheel

Ensure pressure is not too high to avoid damaging the aluminum media

Use water at a distance of at least 0.08 m (2 ft) from the wheel