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Supply Fans
WV Series units are equipped with direct
drive forward curved or backward curved
plenum supply fan assemblies that deliver the
air volume specified according to unit size
and job requirements.
Figure 9 - WSHP Series Supply Fan
Fan Air Flow Adjustment
A specific air volume is delivered by the PSC
fans. Field airflow adjustment may be
required at startup.
WV024-060
Standard PSC motors have limited RPM
Adjustment to adjust airflow. Each motor
type has three speed taps to select from: High,
Medium, and Low. Adjustment for the PSC
speed must be made by altering the motor
power connected to the motor.
Adjustment for the A and B cabinet units is
made by adjusting the DC voltage signal to
the motor from the Pioneer Expansion board
or the Pioneer Gold board. Low fan speed is
achieved by connecting the compressor Y
call from the thermostat to Y1 on the control
board. The higher fan speed is achieved by
connecting Y from the thermostat to Y2 on
the control board.
26
Motor Tap RPMs
Fan
RPM
Speed
High
1200
Med
950
Low
800
Note: RPMs are approximate, and will vary
slightly depending on TSP across the blower
assembly
For unit operation at ISO 13256-1 rating
conditions, PSC blower motors must use
"High" Speed. Please consult factory for
details.
Filters
Do not operate the unit without filters in
place. Check the unit for correct filter
placement during startup. Operation of the
equipment without filters will result in a
clogged air coil.
CAUTION
Before completing startup and leaving
the unit a complete operating cycle
must be observed to verify that all
components are functioning properly.
PSC Tap
Black
Blue
Red
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