AAON RZ Series, Installation Operation & Maintenance

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Soak in the solution until grease and tar
deposits are loosened (Note: some staining of
the desiccant may remain and is not harmful
to performance). Before removing, rapidly
run finger across surface of segment to
separate polymer strips for better cleaning
action. Rinse dirty solution from segment and
remove excess water before reinstalling in
wheel.
Energy Recovery Wheel Defrost Timer
Setting
Set Mode to D
T1 is the on time

Set T1 range to 10m (10
minutes)

The scale shows 0-6 on the
dial

Set T1 dial to 3 which equals
30 minutes of run time
T2 is the off time

Set T2 range to 1m (1 minute)

The scale shows 0-6 on the dial

Set T2 dial to 2 which equals 2
minutes of off time
Adjust temperature dial to set the point at
which any temperature below will activate
the defrost timer. Recommended setting is
35
°
F.
Once the OA Temperature goes below the
setpoint, the wheel timer will stop for 2
minutes and run for 30 minutes and will
continue to cycle at this rate as long as OA
Temperature is below setpoint. If more off
time is required to defrost the wheel, increase
the T2 Knob time to a greater off time than 2
minutes.
Figure 37 - Defrost Timer
Figure 38 - Temperature Dial