Aaon Packaged Rooftop Unit RN-008

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.

Ensure the bearing is at normal operating temperature but not running

Select the recommended grease used

Inspect all flue product carrying areas of the furnace and main burners for continued safe operation.

Check gas pipe for leaks before operation and startup.

Ensure all gas supply lines have been purged of air before turning on the electrical power switch.

Turn the gas valve to the on position.

Turn the main electrical power on and set the controls to the heating mode of operation.

Did the combustion ventilation motor enable?

Did the control automatically supply energy to the igniter and the gas valve after the heating call was made?

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

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

Ensure temperature is below 25°C (77°F)

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?