80
Piping systems must not exceed 10 ft/sec
fluid velocity to ensure tube wall integrity
and reduce noise.
Energy Recovery Units
Some RN units have been equipped with an
energy recovery wheel. AAON provides
options for either an aluminum energy
recovery wheel or a polymer energy recovery
wheel. Follow the instructions for the
specific type of energy recovery wheel in
your installed equipment.
Initial Mechanical Check and Setup
Outdoor units equipped with outside air
intake will have an outside air hood. The
outside air hood must be opened prior to unit
operation.
Outdoor air intake adjustments must be made
according to building ventilation, or local
code requirements.
After the unit installation is complete, open
the cassette access door and determine that
the energy wheel rotates freely when turned
by hand. Apply power and observe that the
wheel rotates. If the wheel does not rotate
when power is applied, it may be necessary
to readjust the “diameter air seals”.
Airflow Balancing and Checking
High performance systems commonly have
complex air distribution and fan systems.
Unqualified personnel must not attempt to
adjust fan operation, or air circulation, as all
systems have unique operations
characteristics. Professional air balance
specialists must 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.
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