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Generac Power Systems PRIMEPACT 50 04164-3 Owner's Manual: Lp Gas Fuel System

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2.4.2
GENERATOR FUEL SUPPLY LINE
2.4.2.1 Rigid Fuel Lines
Those lines used to supply fuel from a tank to the generator must
comply with applicable codes, standards and regulations. The fol-
lowing general rules apply to rigid fuel lines:
Rigid lines should be of annealed, seamless, drawn aluminum
or steel.
Lines and fittings must comply with SAE J512F, "Standard
Automotive Fittings," or with ANSI B126.26 (latest edition).
Route the fuel line so that at least 2 inches (51 mm) of clear-
ance is maintained between the line and any exhaust system
parts.
Do not attach electrical wiring to fuel lines. Route the wiring so
it cannot come into contact with any fuel line.
Route fuel lines so if they leak, fuel does not drip onto any
electrical or exhaust system parts.
Use nonferrous metal straps without sharp edges to secure
fuel lines.
2.4.2.2 Flexible Fuel Line
Use an approved flexible length of fuel hose between the generator
fuel inlet connection and rigid fuel lines. This prevents breaking of
the line caused by vibration, shifting, settling or movement. The
following rules apply:
The flexible hose must comply with SAE J1737 (30R7),
"Standard for Fuel and Oil Hose." It must be approved for use
with gasoline and low permeability.
The hose should be at least 6 inches (152 mm) longer than
is needed to prevent the hose from rupturing if the generator
shifts or settles.
2.5

LP GAS FUEL SYSTEM

DANGER
LP gas is highly EXPLOSIVE. The gas is heavier
than air and tends to settle in low areas. Even
the slightest spark can ignite it and cause and
explosion. Only competent, qualified people
should be allowed to install, test, adjust or ser-
vice an LP gas fuel system. Install the optional
fuel system in compliance with applicable codes,
standards and regulations. After the installation,
do not do anything that might render the system
in noncompliance with applicable codes and
standards.
The LP powered range of generators are fitted with a nonadjust-
able, factory set system. These systems are tamper-proof to meet
1997 California Air Resources Board requirements for engine
emission.
28
Section 2 – Installation
Recreational Vehicle Generator
2.5.1
PARTS NOT INCLUDED IN FUEL SYSTEM
The propane fuel system does NOT include such items as (a) gas
tank, (b) gas piping, (c) fittings, (d) valves, and (e) primary regula-
tor, used to store the gaseous fuel and deliver it to the gaseous fuel
solenoid (Figure 2.15).
DANGER
Use only approved components in the fuel sup-
ply system. All components must be properly
installed in accordance with applicable codes.
Improper installation or use of unauthorized
components may result in fire or an explosion.
Follow approved methods to test the system for
leaks. No leakage is permitted. Do not allow fuel
vapors to enter the vehicle interior.
Figure 2.15 – Typical Propane Gas Fuel System
2.5.2
SOME IMPORTANT CONSIDERATIONS
When installing an LP gas system, consider seriously the following
items:
All fittings, lines, hoses and clamps must be tight and free of
leaks. Apply a pipe sealant to threads when assembling thread-
ed connections. This reduces the possibility of leakage.
Test the entire fuel system for leaks using approved test meth-
ods.
Optimum gas pressure at the inlet to the gaseous fuel solenoid
valve and secondary regulator is 11 inches water column.
The installer's fuel supply connection point is at the gaseous
fuel solenoid valve. This is a 3/4-inch (female) connection.
Provide a suitable 3/4-inch NPT (male) connector to attach to
the fuel supply line.
Use a length of approved flexible fuel hose between the gaseous
fuel solenoid valve and rigid gas piping. The flexible line should
be at least six (6) inches longer than necessary.

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