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General
Check all fasteners and set screws for tightness. This is
especially important for bearings and fan wheels. Also,
if dampers are not motorized, check that they open and
close without binding.
Check Voltage
Before starting the unit compare the supplied voltage
with the unit's nameplate voltage and the motor voltage.
Check Blower Wheel Rotation
Forward Curved
First, hand rotate the
blower to ensure that
Airflow
the wheel is not rubbing
against the scroll. If the
blower is rotating in the
wrong direction, the unit
will move some air but not
perform properly.
Forward Curved
To check the rotation, open the blower access
panel, and run the blower momentarily to determine
the rotation.
Air Volume Check and Measurement
Along with the building balance, the unit's airflow (cfm)
should be measured and compared with its rated air
volume. The unit is directly driven, therefore balancing
dampers or speed controls are required for airflow
balancing. Air volume measurement must be conducted
with access doors on the unit.
The most accurate way to measure the air volume is
by using the pitot traverse method in the ductwork
away from the blower. Other methods can be used, but
should be proven and accurate.
To adjust the air volume, change the fan rpm or the
system static pressure.
With all access panels on the unit, compare measured
amps to the motor nameplate full load amps and correct
if overamping.
Measure Motor Voltage, Amperage and
Fan RPM
With all access panels installed, run the measurement
leads through the electrical access hole in the bottom
access panel of the MiniCore. Measure and record the
input voltage and motor amperage(s).
Compare measured amps to the motor nameplate full
load amps and correct if overamping.
11
Energy Core Ventilator
®
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