AAON RN-140 - Manual (Page 65)

65
Confirm that the wheel rotates freely. Apply
power to the unit and confirm rotation.
Airflow Balancing and Checking
High performance systems commonly have
complex air distribution and fan systems.
Unqualified personnel should not attempt to
adjust fan operation, or air circulation, as all
systems
have unique operations
characteristics. Professional air balance
specialists should be employed to establish
actual operating conditions, and to configure
the air delivery system for optimal
performance.
Controls
A variety of controls and electrical
accessories may be provided with the
equipment. Identify the controls on each unit
by consulting appropriate submittal, or order
documents, and operate according to the
control manufacturer’s instructions. If you
cannot locate installation, operation, or
maintenance information for the specific
controls,
then contact your sales
representative, or the control manufacturer
for assistance.
Routine Maintenance and Handling
Handle cassettes with care. All cassettes
should be lifted by the bearing support
beam. Holes are provided on both sides of
the bearing support beams to facilitate
rigging
as shown in the following
illustration.
Lifting Hole Locations
Routine
maintenance of the Energy
Recovery Cassettes includes periodic
cleaning of the Energy Recovery Wheel as
well as inspection of the Air Seals and
Wheel Drive Components as follows:
Cleaning
The need for periodic cleaning of the energy
recovery wheel will be a function of
operating
schedule, climate and
contaminants in the indoor air being
exhausted and the outdoor air being supplied
to the building.
The energy recovery wheel is “self-
cleaning” with respect to dry particles due to
its laminar flow characteristics. Smaller
particles pass through; larger particles land
on the surface and are blown clear as the
flow direction is reversed. Any material that
builds up on the face of the wheel can be
removed with a brush or vacuum. The
primary need for cleaning is to remove oil
based aerosols that have condensed on
energy transfer surfaces.
A characteristic of all dry desiccants, such
films can close off micron sized pores at the
surface of the desiccant material, reducing
the efficiency by which the desiccant can
Do not alter factory wiring. Deviation
from the supplied wiring diagram will
void all warranties, and may result in
equipment
damage or personal
injury. Contact the factory with wiring
discrepancies.
WARNING