28
Generac
®
Power Systems, Inc.
Section 2 – Installation
IMPACT-36 plus II Recreational Vehicle Generator
Do NOT tee the generator fuel supply line
into the vehicle engine fuel supply line. If this
is done, the generator will be starved of fuel
when both engines are operating at the same
time. Also, while the vehicle engine is not
running, generator operation may drain the
vehicle engine supply line, making it difficult
to start the vehicle engine.
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, stan-
dards and regulations. The following generator 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 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 non-ferrous 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 follow-
ing rules apply:
• The flexible hose must comply with SAE J30B,
“Standard for Fuel and Oil Hose”. It must be
approved for use with gasoline.
• The hose should be at least 6 inches longer than is
needed to prevent the hose from rupturing if the
generator shifts or settles.
LP (propane) gas is highly explosive. The gas is
heavier than air and tends to settle in low
areas, where even the slightest spark can
ignite it and cause an explosion. Only compe-
tent, qualified persons should be allowed to
install, test, adjust or service an LP gas fuel sys-
tem. Install the optional fuel system in compli-
ance with applicable codes, standards and reg-
ulations. After the installation, do nothing that
might render the system in non-compliance
with applicable codes and standards.
2.5
PROPANE GAS FUEL SYSTEM
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 regulator, used to store the
gaseous fuel and deliver it to the gaseous fuel sole-
noid (Figure 2.15).
Figure 2.15 — Diagram of LP Gas System
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