Milton CAT G200LG4 200kW_250kVA LG Installation Guide - Manual (Page 8)

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1.5 UNPACKING
‹ 1.5.1 UNPACKING PRECAUTIONS
Handle shipping cartons and crates with care. Use
care to avoid damage from dropping, bumping, colli-
sion, etc. Store and unpack cartons with the proper
side up, as noted on the shipping carton.
‹ 1.5.2 INSPECTION
After unpacking, carefully inspect the generator for
any damage that may have occurred during ship-
ment. If loss or damage is noted at the time of deliv-
ery, have the person(s) making delivery note all dam-
age on the freight bill or affix their signature under
the consignor’s memo of loss or damage.
1.6 LIFTING THE GENERATOR

When lifting or hoisting equipment is used, be
careful not to touch overhead power lines. The
generators weight of more than 900 pounds
requires proper tools, equipment, and qualified
personnel to be used in all phases of handling
and unpacking.
1.7 FUEL SYSTEMS
‹ 1.7.1 INTRODUCTION TO GASEOUS FUEL
SYSTEMS
DANGER

Gaseous fuels, such as LP and natural gas, are
highly volatile and their vapors are explosive.
LP gas is heavier than air and will settle in low
areas. Natural gas is lighter than air and will
settle in high areas. Even the slightest spark
can ignite these fuels and cause an explosion.
For safety, all codes, standards and regulations
pertaining to the installation and use of gaseous
fuels must be strictly complied with.
Local fuel gas codes may vary widely. For that reason,
it is recommended that a local gas distributor or
installer be consulted when installing a gaseous fuel
supply system.
In the absence of local fuel gas codes and regulations,
booklets published by the National Fire Protection
Association (NFPA) may be used as sources of infor-
mation.
‹ 1.7.2 PROPERTIES OF GASEOUS FUELS
Natural Gas
Natural gas is lighter than air. It is found in the
gaseous state at normal ambient temperatures and
pressures. It is highly explosive and can be ignited at
the slightest spark. For that reason, fuel lines must
be free of leaks and adequate ventilation is absolutely
essential.
Local fuel/gas codes usually dictate the maximum
pressure at which natural gas can enter a structure.
In order to reduce the gas pressure to that required
by law, a PRIMARY REGULATOR is required.
LP Gas
Liquefied petroleum (LP) gas is heavier than air. The
gas vapors are explosive and, like natural gas, can be
ignited by the slightest spark.
LP tank pressure is dependent on the ambient tem-
perature and can be as high as 200 psi. A primary
regulator is required at the tank to reduce the pres-
sure to the required five to 14 inches of water column
for units less than 70kW, or 11 to 14 inches of water
column for units 70kW and larger.
‹ 1.7.3 THE NATURAL GAS SYSTEM
A typical natural gas system is shown in Figure 1.2,
below. The maximum pressure at which the gas can
enter a building is established by code and may vary
from area to area. A primary regulator is required to
reduce gas supply pressures to the required safe level
before the gas enters a structure.
The primary regulator may or may not be provided
by the gas supplier. The gas distribution company
will usually provide piping from the main distribu-
tion line to the generator site. It is the responsibility
of the gas supplier to ensure that sufficient gas pres-
sure is available to operate the primary regulator.
From the primary regulator, gas flows to the genera-
tor connection. A flexible length of gas line is required
between rigid piping and the gas connection at the
generator. The generator fuel system consists of an
electrical fuel shutoff valve/regulator assembly and a
gas actuator.
The secondary regulator reduces gas pressure to
about five inches of water column before the gas Is
delivered to the actuator.
NOTE:
Gas pressure from the primary regulator (supplied
by the installing contractor) to the generator's fuel
shutoff valve should not exceed 14 inches of water
column. Units can operate with the pressure as
low as five inches of water column.
Section 1 — General Information
Liquid-cooled Generators