14
Supply Air Wheel
AAON units are equipped with a Backward Inclined
Blower Wheel that is set to deliver the air volume speci-
fied according to unit size and/or job requirements.
Air Adjustment
In the event that reduced air volume is required, an air
volume band can be installed within the blower wheel to
reduce the amount of air delivery. If the unit is factory
equipped with the air band but additional air delivery is
needed, the band can be removed from the wheel.
The air band is sized according to the air delivery speci-
fications and can be ordered from the factory for field
installation.
The related photos of the wheel are provided for practical
guidelines only in order to identify the air band location
in the wheel. Actual field installation of the air band into
the wheel will require access into and through the blower
wheel venturi.
The band is made of aluminum, sized and equipped with
easy bend tabs that are to be inserted into pre-punched
slots provided on the wheel. Once the band has been
inserted into the slots, it MUST BE secured by bending
the tabs over from the back side of the wheel and also
MUST BE secured from the inside by connecting the ends
together with a pop-rivet in the holes provided on the
ends of the band. If the band is to be field installed, a
hand held pop-rivet tool is recommended for connecting
the band ends together. Caution must be taken to assure
that the band is tightly installed and no damage, denting
or alteration to the wheel or blades occur during the
installation.
STARTUP continued
▲
Before attempting service or maintenance,
SHUT OFF all electrical power to the unit
to avoid injury from rotating parts.
!
WARNING
AIR VOLUME
BAND INSERTED
INTO SLOTS
INSTALLED FROM
THE INSIDE OF
THE WHEEL
ALL TABS
MUST BE
BENT OVER
AFTER INSERTED
FROM THE INSIDE
OF WHEEL
SECURE
ENDS WITH
POPRIVET
END HOLES
PROVIDED ON
THE BAND
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