AAON H3 Series, Установка, эксплуатация и обслуживание

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Electrically Commutated Motor Airflow
Adjustment
Figure 18 - Typical wiring diagram with EC
motor
If the application is for the motor to run at a
constant speed, the potentiometer can be
utilized without any change. If the
application is to vary the motor speed for
changing conditions, remove the jumper
indicated on the terminal strip (red wire).
Figure 19 - Shows the jumper that is to be
removed (jumped between S1 and S2).
Note, the potentiometer is still active in the
electrical loop. Refer to Figure 18.
Figure 20 - Potentiometer
Set the potentiometer dial for the maximum
fan speed for a particular application.
Maximum fan speed is determined by the
ECat submittal. Typically, this max speed
will be the rpm set at the factory.
The fan speed can be modulated using the
0-10 VDC input signal.
To check fan output from the factory, the
potentiometer can be dialed to 100%. By
sending a 5V signal*, for instance, the rpm
can be measured and this reading can be
converted to cubic meters (cubic feet) of air
moved by the fan.
It is advised that a medium range signal* be
utilized for this procedure. The highest
signal sent by the controller can then be
determined by adjustment.
Before completing startup and leaving
the unit a complete operating cycle
must be observed to verify that all
components are functioning properly.
CAUTION