Spencer GasCube Natural Gas Booster Skid Package - Manual (Page 6)

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center.
VI. Operation and
Adjustments
Startup Precautions
IMPORTANT NOTE: Before operating a new GasCube
package for the first time, review the installation and
setup procedures to be sure that no steps have been
overlooked.
1. Installation Check List
• Is there any damage from transportation or installation?
• Is the package level?
• Have all packing, shipping materials and tools been
removed?
• Have inlet and outlet pie-plate covers been removed?
• Are isolation pads in place?
• Is the piping connected and supported?
• Are flexible connectors in place between the gas boost-
er and piping?
• Is the check valve properly installed?
2. Operational Checks
• Is the isolation valve open or properly positioned?
• Is the system ready for gas delivery?
• Has motor rotation been checked?
• Is the control panel properly wired?
• Is the control panel energized?
• Have maintenance and operations personnel been noti-
fied?
Caution: The GasCube package must have adequate
system resistance at all times to avoid operation at
or near free delivery (wide open). Overloading the
GasCube booster motor will damage it. The facili-
ty gas equipment should impose proper resistance
(See Section VIII. Troubleshooting Guide). The Control
Panel has been programmed to shut down the GasCube
package on overload.
GasCube Startup
Caution: Upon energizing the Control Panel, please
allow approximately one minute before starting the gas
booster. The time will allow proper loading of the PLC
software that has been programmed specifically for the
intended GasCube package.
Once the GasCube package has been properly connected
to the natural gas line with the control panel sufficiently
energized and the plug valves wide open, the GasCube
package can now be started. After starting, quickly assess
the current draw of the motor. If necessary, adjust the sys-
tem load or throttling valve (plug valve) until the desired
flow is reached, being careful not to operate in surge or to
exceed the full rated motor capacity. Initially, gas boost-
ers will temporarily develop more differential pressure
and take more power. Check final settings after operat-
ing temperature is achieved, typically after one-half hour.
If the throttling valve (plug valve) was used in adjust-
ing the system load, it should be fixed at this point to
prevent further opening and possible overloading of motor.
Surge (Low Flow)
CAUTION: Do not operate the GasCube package in
surge (unstable low flow range). Spencer’s warranty
does not cover damage to the gas booster caused by
operating in surge.
Surge is destructive because it is accompanied by
excessive temperatures and aerodynamic forces that will
ultimately cause mechanical failure. A gas booster in surge
produces a rush or pulsating rhythmic air sound caused
when airflow into or out of the gas booster is restricted. In
addition to its characteristic noise, surge may be detected
by power or pressure fluctuations. A surge condition can be
eliminated by increasing the gas flow through the system or
to the supplied recirculation loop. Surge control devices are
supplied with every GasCube package and factory preset
and should not need modification. See pages 8-14
for spe-
cific details of your model.
If surge is detected after startup in a GasCube package
equipped with a manual recirculation loop system, the surge
control system can be modified by opening the recirculation
loop valve in 5 degree increments until the surge condition
is eliminated.
If surge is detected after startup in a GasCube package
equipped with a motor actuated valve and heat exchanger
in the recirculation loop system, the recirculation loop valve
will automatically open until the surge condition is elimi-
nated.
If an overload is detected after startup in a GasCube pack-
age, the recirculation loop valve will automatically close until
the overload condition is eliminated.
VII. Maintenance
WARNING: FOR SAFETY, DISCONNECT AND LOCK
OUT ELECTRICAL POWER BEFORE PERFORMING ANY
MAINTENANCE.
Replacement Parts
Refer to the appropriate GasCube package diagram in this
manual for replacement part names and numbers. When
ordering parts, it is necessary to provide full information about
your Spencer equipment. When reading nameplates, be sure
that you obtain the correct information and record it on the
cover of this manual. This will serve as your reference for
facilitating replacement-part orders.
Remember, the more complete your information, the quicker
your order will be processed. Incomplete information will result