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Startup
(See back of the manual for startup form)
Operation Limits
Min. Entering Air
Max Entering Air
Min. Entering Water
Max Entering Water
Min. GPM/Ton
Max GPM/Ton
Min. CFM/Ton
WARNING
Improper
installation,
alteration, service or maintenance
can
cause
personal injury or loss of life. Startup
and service must be performed by a
Factory Trained Service Technician.
Keep a copy of this IOM with the unit.
WARNING
Electric shock hazard. Shut off all
electrical power to the unit to avoid
shock hazard or injury from rotating
parts.
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 water flow. Due to the
charge-critical
nature
refrigerant pressure gauges must only be
hooked up to the unit if there is suspicion of
an issue within the circuit.
Supply Fans
WSHP Series units are equipped with direct
drive forward curved or backward curved
plenum supply fan assemblies that deliver
34
Cooling
Heating
65°F
55°F
100°F
80°F
68°F
50°F
104°F
86°F
1.5
4
300
adjustment,
property
damage,
of
these
units,
the air volume specified according to unit
size and job requirements.
Figure 24 - WSHP Series Supply Fan
Fan Air Flow Adjustment
A specific air volume is delivered by the
PSC or Electronically Commutated Motor
(ECM) fans. Field airflow adjustment may
be required at startup.
Standard PSC and ECM motor options 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 ECM speed is
made by adjusting the call wire to the
corresponding 1/4" speed terminal directly
on the motor body (WH015 - 060).
Adjustment for the A cabinet units (WH006-
012) 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
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