AAON V3-E - Manual (Page 32)

32
Hot Gas Reheat Guidelines
Maintain velocities below a maximum of
3,500 fpm. A general minimum velocity
guideline is 2,000 fpm.
Startup
(See back of the manual for startup form)
During startup, it is necessary to perform
routine checks on the performance of the
unit. This includes checking of the air flow,
the air filters and refrigerant charge.
Supply Fans
H3 and V3 Series units are equipped with
direct drive backward curved plenum supply
fan assemblies or belt driven backward
curved plenum supply fans that deliver the
air volume specified according to unit size
and job requirements.
Fan Air Flow Adjustment
A specific air volume is delivered by the
fans with air volume bands in the blower
wheels, Electronically Commutated Motors
(ECM), or Variable Frequency Drives
(VFD). Field air flow adjustment may be
required at startup.
Air volume bands for the wheels are sized
according to the unit’s air delivery
specifications and can also be ordered from
the factory for field installation.
Air Flow Adjustment
If reduced air volume is required an air
volume band or larger air volume band can
be installed within the blower wheel to
reduce the amount of air delivered by the
wheel.
If the unit is factory equipped with the air
volume band and additional air volume is
required, the band can be removed from the
wheel.
Use fan program in AAONEcat32 to
determine the new band size for the required
cfm and static pressure.
The following photos of a 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 venture,
which may require removal of the blower
motor and wheel.
Air volume bands are 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.
Improper installation, adjustment,
alteration, service or maintenance
can
cause property damage,
personal injury or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician.
A copy of this IOM should be kept
with the unit.
WARNING
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
WARNING