Gillette Generators SPP-180 - Manual (Page 12)

PAGE 12
Propane (LPG) and natural gas (NG) is
extremely flammable and explosive.
Fire or explosion can cause serious
burns or death.
LPG 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 home standby generator set leaves the factory
set up for natural gas (NG) fuel. This generator can
be ordered with liquid petroleum gas (LP) from the
factory or it can easily be converted at the jobsite
with no special tools or test equipment.
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 the
generator. This valve must be easily
accessible.
A furnished, 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 6 to 8
inches water column (4 to 4½ ounces) and minimum
1000 BTU rating per cubic foot/hour
Figure 1
* BTU Values based on 1000 BTU’s per cubic foot.
Gas supplier may need to know Nat. Gas consumption
at full load, in measurements of cubic feet/hour or
BTU/hour
Figure 2
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.
EXAMPLE 1: A model SPS-120, 11 KW generator is to
be installed 35 feet from gas meter. In reading the
charts: figure 1 chart shows this model to require 195
cubic feet per hour (or 195,000 BTU/HR) gas volume
to be delivered to generator. Figure 2 chart shows
the required 195 cubic feet/hour can only be
delivered up to 30 feet, with ¾” diameter pipe, or up
to 50 feet with a 1” diameter pipe, or up to 90 feet
with a 1¼” diameter pipe. This means the original
planned distance of 35 feet, must be shortened to
30 feet with ¾” diameter pipe, or use 1” diameter
pipe at the 35 feet distance.
NATURAL GAS CONSUMPTION AT FULL LOAD
Gen. Model Gen. KW Cubic Ft./Hr BTU/Hr. *
SPS-120 12.0 195 195,000
SPP-180 16.0 280 280,000
NATURAL GAS FUEL LINE MAXIMUM
DIAMETERS AND LENGTHS
Pipe
Length In
Feet
Allowed Distance From NG Meter to Gen-Set
0-10
11-
20
21-
30
31-
40
41-
50
51-
60
61-
70
71-
80
81-
90
P
ip
e
D
ia
m
e
te
r
In
In
c
h
e
s
¾ 350 249 200 171 152 138 --- --- ---
1 600 415 342 288 251 224 204 187 ---
1¼ 1265 890 740 628 553 497 455 421 350
Cubic feet of natural gas that can safely be
carried in its matching pipe diameter.
The following LPG 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