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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.
Filters
Do not operate the unit without filters in
place. Operation of the equipment without
filters in place can result in clogged coils.
Units are shipped with the selected filters
installed. If filters have been removed during
installation, open the filter access door and
re-install the correct filters with the airflow
indicator arrows pointing in the direction of
airflow.
Check filters after a few days of operation
after the unit has been started up as dust and
debris from construction may cause
premature filter loading. Replace the filters
if necessary.
Supply Fans
V3 Series units are equipped with direct drive
backward curved plenum supply fan
assemblies that deliver the air volume
specified according to unit size and job
requirements.
Fan Air Flow Adjustment
On some V3 Series units, a specific air
volume is delivered by the fans with
Electronically Commutated Motors (ECM).
Field air flow adjustment may be required at
startup.
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.
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