AAON RQ NextGen Series, Installation Operation & Maintenance

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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.
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 .64 cm (1/4 of an inch) (dimension A
& B). This amount of racking can be
compensated for by adjusting the diameter
seals.
If greater than .64 cm (1/4 of an inch)
(dimension C), racking must be corrected to
ensure that drive belt will not disengage from
wheel.
Avoid Racking of Cassette Frame
Operation
Startup Procedure
1. By hand, turn wheel clockwise (as
viewed from the pulley side), to
verify wheel turns freely through 360º
rotation.
2. Before applying power to drive
motor, confirm wheel segments are
fully engaged in wheel frame and
segment retainers are completely
fastened. (See Segment Installation
Diagram).
3. With hands and objects away from
moving parts, activate unit and
confirm wheel rotation. Wheel rotates
clockwise (as viewed from the pulley
side).
4. If wheel has difficulty starting, turn
power off and inspect for excessive
interference between the wheel
surface and each of the four (4)
diameter seals. To correct, loosen
diameter seal adjusting screws and
back adjustable diameter seals away
from surface of wheel, apply power to
confirm wheel is free to rotate, then
re-adjust and tighten hub and
diameter seals, as shown in hub seal
adjustment diagram.
5. Start and stop wheel several times to
confirm seal adjustment and to
confirm belt is tracking properly on
wheel rim (approximately .64 cm [1/4
of an inch] from outer edge of rim).
B
C
A
Bearing beams shown
racked
Frame
Wheel
Bearing
beams
(2)
Flat surface
Keep hands away from rotating wheel!
Contact with rotating wheel can cause
physical injury.
CAUTION