18
05
Installation
Manual 2008 Rev A p/n 2008
Oil Pressure Adjustment
The oil pressure on each unit has been preset at
the factory during the load testing. Generally the oil
pressure should not require adjustment once the
unit is installed and in operation.
To adjust the unit to the proper oil pressure,
remove the hex cap shown in
Figure 5-4
. Loosen
the lock nut and turn the set screw clockwise to
increase the pressure, or turn counterclockwise
to decrease the pressure. Tighten the lock
nut and replace the cap before reading the oil
pressure. Always allow the unit to reach operating
temperature before adjusting the oil pressure to the
proper range. Set the oil pressure to 15 psig
(103 kPa).
REMOVE
HEX CAP
TO ADJUST
OUT
IN
Figure 5-4 – Pressure Relief Valve
Oil Cooler
The supply line to the cooler can be connected
to either hole. The fluid flowing through the heat
exchanger should be sufficient to keep the oil
temperature to the optimum operating range of
150-180°F (65-80°C). This temperature will ensure
proper lubrication of the bearings and seals.
WARNING
!
If the unit is to be located outside or in a
building where ambient temperatures can fall
below freezing, then care must be taken to
ensure the water or liquid used for cooling
does not freeze and damage the blower. The
oil cooler must be drained of liquid during
downtime unless a re-circulating unit using a
glycol mixture has been installed.
PIPING CONNECTIONS
WARNING
!
Pipe loading on the blower should be
negligible as pipe loading can cause
distortion of the blower. Use proper supports
and pipe hangers to assure that there is no
loading.
Remove the protective covers from the inlet
and outlet ports and inspect for dirt and foreign
material.
Inlet and outlet connections on all blowers are
large enough to handle maximum volume with
minimum friction loss. Maintain same-diameter
piping. Do not support silencers by the blower.
Avoid stress loads and bending moments.
Be certain all piping is clean internally before
connecting to the blower. Place a 16-mesh wire
screen backed with hardware cloth at or near
the inlet connections for the first 50 hours of use
until the system is clean. Clean the screen after
3 hours of operation and completely discard it
once the system is clean, as it will eventually
deteriorate and small pieces going into the blower
can cause serious damage. A horizontal or vertical
airflow piping configuration is easily achieved by
rearranging the mounting feet position.
Summary of Contents for PD Plus 9000 Series
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