Gillette Generators SP-1500 - Manual (Page 21)

PAGE 21
Propane (LPV) and natural gas (NG) is
extremely flammable and explosive.
Fire or explosion can cause serious
burns or death.
LPV is heavier than air and will settle in low areas.
NG is lighter than air and will collect in high areas.
The slightest spark can ignite either fuel and can
cause fire or explosion.
This standby generator set leaves the factory with a
set up for Natural Gas (NG) fuel or with liquid
petroleum gas (LPV), depending on requirements of
jobsite.
All piping and layout planning must comply with
NFPA 54 (specifications for dry fuel equipment).
Before fuel pipe installation begins, installer should
consult local fuel supplier and the local Fire Marshall
to learn proper codes/regulations for a safe
installation.
Special consideration should be given where local
conditions include flooding, tornados, hurricanes,
earthquakes, or unstable ground for the flexibility
and strength of fuel pipe and pipe connections. Use
an approved gas pipe sealant on all threaded pipe
joints.
All installed gas fuel lines must be purged and leak
tested prior to initial start-up in accordance to local
codes, standards, and regulations.
A minimum of (1) approved manual shut-off gas valve
must be installed in the gas line leading to, and as
close as possible to the generator. This valve must be
easily accessible.
A stainless steel, flexible fuel line is to be
installed between stationary fuel supply
pipe and fuel inlet pipe to generator. Always install
this flexible line in a horizontal, straight manner. If it
is installed with a bend of any degree, it may
eventually crack at the bend and cause a gas leak,
causing a possible fire hazard.
NATURAL GAS FUEL
Required natural gas fuel pressure must be seven (7)
inches water column and minimum 1000 BTU rating
per cubic foot/hour.
CAUTION: It is critically important to understand that
as a specific fuel line pipe diameter is extended in
length, its ability to carry the volume of gas,
diminishes in direct proportion.
INSTALLER’S RESPONSIBILITY: Use chart (Table
A) on page 20 to learn fuel cubic feet/hour value
of generator to be installed. Use Natural Gas fuel
chart (Table C) to learn minimum pipe size
diameter and maximum distance from gas meter,
to insure sufficient fuel volume from natural gas
meter to generator set.
CRITICAL POINTS FOR A PROPER
NATURAL GAS INSTALLATION
Before natural gas fuel line plans are made, call
your natural gas supplier, give information on the
amount of cubic feet/hour and the BTU’s/hour from
tables on page 20 that generator will use, and ask if
natural gas meter and primary regulator, is adequate
for your natural gas generator. Natural gas
companies have different meters for increasing BTU
gas demands.
Check the natural gas primary regulator,
connected at natural gas meter output. The correct
primary regulator is set at 7 inches water column (4 to
4½ ounces pressure or 0.19 to 0.26 PSI). The existing
primary regulator (for other gas appliances) is a
wrong choice, as it is too small to run your gas driven
generator.
A dedicated natural gas fuel line and primary
gas regulator (if required) is mandatory for proper
operation.
A flexible natural gas fuel line is required for
installation between utility gas line and generator fuel
input.
CAUTION: Make sure this stainless steel flexible
fuel line is installed in horizontal position without
bends. A bend of any kind in this flexible line
could lead to an eventual crack in the bend,
causing a possible leak. See Figure 10 for a
recommended installation.
Make sure fuel pipe installation and connection at
generator includes an on/off manual gas valve.
The following LPV and NG fuel information is
provided to assist the fuel installer. In no way should
this information be deemed to be all-inclusive or to
conflict with local dry fuel codes. Consult your local
fuel supplier or Fire Marshall for final answers on
proper local codes and installations.
THE GASEOUS DRY FUEL SYSTEM INSTALLATION
WARNING
WARNING