Installation manual

4-2010 3. Step-By-Step Outline of Installation
TABLE 20. NATURAL GAS PIPE CAPACITY - CUBIC FEET OF GAS PER HOUR
Normal Iron Length of Pipe in Feet
Pipe Size
10 20 30 40 50 60 70 80 90 100 125 150 175 200
(Inches)
3/4 360 250
1 680 465 375 320 285 260 240
1 1/4 1400 950 770 660 580 530 490 460 430 400 360 325 300 280
Maximum pipe capacity in cubic feet per hour of 0.60 specific gravity Natural Gas with a pressure drop of 0.5 inches
(1.27 mm) WC over the length.
3.7.4 Propane Fuel System
WARNING: NFPA Standard No. 58 requires all persons handling and operating Propane
to be trained in proper handling and operating procedures.
WARNING: Fuel leaks can lead to explosive accumulations of gas. Propane sinks in air
and can accumulate inside housings, basements and other below-grade
spaces. Prevent gas leaks and the accumulation of gaseous fuel in the event
of a leak.
3.7.4.1 Recommended Fuel (Propane)
WARNING: Propane presents the hazard of fire or explosion that can cause severe
personal injury or death. Do not permit any flame, spark, arc-producing
equipment, switch, pilot light, cigarette or other ignition source near the fuel
system. Keep an ABC type fire extinguisher nearby.
Use clean, fresh HD-5 grade Propane or equivalent product consisting of at least 90% Propane.
NOTE: Commercial Propane may contain more than 2.5% butane, which can result in
poor fuel vaporization and low tank pressure - resulting in poor engine
staring in below 32 °F (O °C) temperatures.
3.7.4.2 Propane Tank Size
First, some Propane tank facts to bear in mind when figuring the proper Propane tank size:
· Propane tanks are sized by the number of gallons of water they can hold, not the amount
of fuel they can hold.
· Propane tanks are generally filled to only 80% of their water capacity. Therefore, a 500 lb.
tank results in 400 lb. tank capacity.
· Low ambient temperatures affect the amount of fuel available from the Propane tank.
· Approximately 60% of the fuel (in gallons) filled in the tank can be effectively used.
Therefore, a 500 lb. tank results in 300 gallon capacity.
To assist in the proper selection of the Propane tank, follow the guidelines below.
· Propane tanks must be fitted with a pressure reducing regulator before connection to the
generator set to prevent fuel system damage.
· Propane tanks must be located at least 10 ft. (3048 mm) from any source of combustion
(including the generator set).
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