Generac Power Systems 0940-1 - Manual (Page 27)

PROPANE GAS FUEL SYSTEM
DANGER: 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 competent, qualified persons should be
allowed to install, test, adjust or service an LP gas fuel
system. Install the optional fuel system in compliance
with applicable codes, standards and regulations. After
the installation, do nothing that might render the system
in non-compliance with applicable codes and standards.
PARIS 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 solenoid (Figure
28).
A
DANGER: Use only approved components in the gas
supply s^m. All components must be property
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 leaka^ is permitted. Do
not allow fuel vapros to enter the vehicle interior.
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
threaded connections. This reduces the possibility of leak­
age.
Test the entire fuel system for leaks, using approved
test methods.
• 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) con­
nector to attach to the fuel supply line.
• Use a length of approved flexible fuel hose between
gaseous fuel solenoid valve and rigid gas piping. The flex­
ible line should be at least six (6) inches longer than nec­
essary.
VAPOR WITHDRAWAL
Liquid propane (LP) gas is stored in pressure tanks as
a liquid. The gas systems used with these generators
were designed only for “vapor withdrawal” type sys­
tems. Vapor withdrawal systems use the gas vapors
that form above the liquid fuel in the tank. Do NOT
attempt to use the kit along with any “liquid withdrawal”
type system.
PRIMARY REGULATOR
Gas pressure delivered to the solenoid valve must be
properly regulated by means of a primary gas regula­
tor. Mount the primary regulator at the gas tank outlet
or in the supply line from the gas tank. The following
rules apply:
• For best results, the primary regulator supplies gaseous
fuel to the secondary regulator at 11 inches water column.
Do NOT exceed 14 inches water column.
• The installer must be sure the primary regulator is rated at
sufficient gas flow to operate the generator plus all other
gas appliances in the circuit.
Figure 28 — Diagram of LP Gas System
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