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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
5.11 Cleaning The Energy Recovery Wheel
Cleaning Instructions
1. Turn OFF electrical supply to the unit.
2. Open front service panels using key provided.
3. Disconnect the wire harness to the actuator located on the return air damper.
4. Remove the screws that is holding return air damper in place.
5. Remove the relief air filter.
6. Carefully pull on the energy recovery module up and out until you are able to
unplug the wire harness.
7. Place the module so you have easy access to the front and back.
8. If the core is wet allow them to dry before cleaning.
9. Using low psi compressed air blow dirt out of core, rotate wheel as required to
completely clean core (Fig. 9).
10. Reassemble in reverse order.
11. Once installed, close doors and turn electrical power back on.
12. Test unit for proper function.
Manufacturer's Recommended Cleaning
Wash the segments or small wheels with a non-acid based (evaporator) coil cleaner
or alkaline detergent solution. Non-acid based coil cleaner such as KMP Acti-Clean
AK-1 concentrate in a 5% solution has been demonstrated to provide excellent
results. Do not use acid based cleaners, aromatic solvents, temperatures in excess
of 170 OF or steam; damage to the wheel may result. Soak in the cleaning solution
until grease and tar deposits are loosened. An overnight soak may be required to
adequately loosen heavy deposits of tar and oil based contaminants.
Internal heat exchange surfaces may be examined by separating the polymer strips
by hand. After soaking, rinse the dirty solution from the wheel until the water runs
clear. Allow excess water to drain prior to replacing segments in the wheel or rein-
stalling the wheel in the cassette. A small amount of water remaining in the wheel
will be dried out by the airflow.
Compressed Air
Relief Air Filter
Energy Recovery Wheel
NOTE:
Some staining of the
desiccant may remain
and is not harmful to
performance.
Figure 9 | Cleaning Energy Recovery Wheel
Wear eye protection
when working with
compressed air.
General Preventative Maintenance
