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INDUSTRIAL GENERATOR SETS — APPLICATION & INSTALLATION MANUAL — REV. #4 (09/07/07) — PAGE 15
Overview
These installation recommendations apply to typical
installations with standard model gensets. Whenever
possible, these recommendations also cover factory
designed options or modifications. However, because of
the large amount of variables involved with any installation,
it is not possible to provide specific recommendations for
every possible situation.
This manual
does not
provide complete application
information for selecting a genset or designing the complete
installation.
This manual is a reference tool only
. If there
are any questions not answered by this manual, contact
your nearest MQ Power dealer or distributor for assistance.
Application and Installation
A standby power system must be carefully planned and
correctly installed for proper operation. This involves two
essential elements of application and installation.
Application
Application as it applies to genset installations refers to the
design of the complete standby power system. Such an
effort usually considers power distribution equipment, transfer
switches, ventilation equipment, and mounting pads.
Consideration is also given to cooling, exhaust, and fuel
systems.
Each subsystem must be correctly designed so the
complete system will function as intended. Application and
design is an engineering function generally done by specifying
engineers or other trained specialists. Specifying consulting
engineers are responsible for the designing the complete
standby system and for selecting the materials and products
to be used.
Installation
Installation refers to the actual setup and assembly of the
standby power system. The installers, usually licensed
contractors, set up and connect the various components of
the system as specified in the system design plan. The
complexity of the standby system normally requires the
special skills of qualified electricians, plumbers, sheet metal
workers, construction workers, etc. to complete the various
segments of the installation. This is necessary so all
components are assembled using standard methods and
practices.
INSTALLATION OVERVIEW
Selection and Application
Generator set size and site location should be considered
in the preliminary design and budget estimate. The
generator size should be selected according to the required
load. Choosing a mounting site located inside the building
or outside in a shelter or housing will help determine how
the genset will be installed and what specific issues need to
be addressed.
Sizing
It is important to assemble a reasonably accurate load
schedule as soon as possible for budgeting project costs.
If all the load equipment information needed for sizing is not
available early in the design planning, estimates and
assumptions will have to be made during the preliminary
calculation in order to account for all needed power . When
all the information becomes available, it is important to
recalculate the sizing requirements to ensure reliable
operation.
Large motor loads, uninterrupted power supplies (UPS),
variable frequency drives, and medical diagnostic imaging
equipment have a considerable effect on the generator set
sizing and should be considered closely. Too, the required
power to start a motor can be considerably larger than the
power required to maintain the load.
Fuel Requirements
Diesel engine generator sets are recommended for
emergency/standby applications. Premium No. 2-D Grade
diesel fuel is recommended for performance and engine life.
On-site fuel storage must be provided. The storage life for
diesel fuel is up to two years when stored properly. Proper
supply tank sizing should allow fuel turnover based on
scheduled exercise and test periods. To avoid condensation
mixing with the fuel, do not provide a fuel tank that is too
large. A microbicide may be required if fuel turnover is low
or conditions promote the growth of microbes in the fuel.
Always consider emissions requirements when designing
the fuel and exhaust system. Refer to the Fuel System
section for more information.