AAON RN SERIES Installation Operation & Maintenance page 59

Installation Considerations
Energy recovery cassettes are incorporated
within the design of packaged units,
packaged air handlers and energy recovery
ventilators. In each case, it is recommended
that the following
addressed:
Accessibility
The cassette and all its operative parts; i.e.:
motor, belt, pulley, bearings, seals and
energy transfer segments must be accessible
for service and maintenance. This design
requires that adequate clearance be provided
outside the enclosure. Where cassettes are
permanently installed in a cabinet, access to
both sides of the cassette must be provided.
Orientation & Support
The Energy Recovery Cassette may be
mounted in any orientation. However, Care
must be taken to make certain that the
cassette frame remains flat and the bearing
beams are not racked.
Frame
A
Wheel
Bearing
beams
(2)
Flat surface
B
Avoid Racking of Cassette Frame
To verify, make certain that the distance
between wheel rim and bearing beam is the
same at each end of the bearing beam, to
within 1/4 of an inch (dimension A & B).
considerations be
Bearing beams shown
racked
C
This amount of racking can be compensated
for by adjusting the diameter seals.
If greater than 1/4 inch (dimension C),
racking must be corrected to ensure that
drive belt will not disengage from wheel.
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