Generac Power Systems 009600-4 - Manual (Page 32)

INSTALLATION Section 6 - Installation
PRIMEPACT 66C and 66LP Recreational Vehicle Generators
llie greater the airflow through the carburetor venturi,
the lower the pressure at the venturi throat. The lower
the
pressure at the venturi throat, the greater the
diaphragm movement, and tlie greater the movement of
the regulator valve. The more the regulator valve opens,
the greater the gas How that is proportional to airflow
through the generator.
The following facts about the secondary regulator must
be emphasized:
• The regulator must be sensitive to venliui throat
pressure changes throughout the operating range.
• The regulator must be properly adjusted so it will
stop the flow of gas when the engine is not running
(no air flow through the carburetor).
• The siiglitest airflow (and vacuum in the venturi
throat) should move the regulator valve off its seat
and permit gas to flow.
• 6.5.6 FUEL SUPPLY LINES
• LP gas lines must be accessible, but protected against
possible damage.
• Do NO'F connect electrical wiring to any LP gas fuel
line or run wiring alongside the lines.
• Ffoute gas lines away from hot engine exhausts.
• Retain gas lines with metal clamps that do not have
sharp edges.
• Install an approved lengl.h of flexible hose between
the gaseous fuel solenoid valve and rigid fuel supply
lines. Tlie flexible line must be nonmetallic, nonor-
ganlc and noiicondiiclive. It must be approved for use
with
LP gas,
• 6.5.7 EXCESS FLOW VALVE
LP gas tanks should have an excess flow valve, accord­
ing to NFPA 501C, Para.grapli 3-4.4. This valve and the
gas lines must be carefully sized so the valve will close
when a fuel line is severed or broken. Coiisull the
Natural-LP Gas Association for information and limita­
tions of excess flow valves.
Manual shutoff valves on the supply tank and elsewhere
in the system must be fully open when operating the
generator. The excess flow valve functions properly only
if all valves are fully open.
♦ 6.5.8 LEAKAGE TESTS
for leaks. Other approved methods of testing for leaks
may be used, if appropriate. DO NOT USE ANY FLAMFi
TO TEST FOR LEAKS.
DANGER
A Gaseous fuel lines between the tank and the sec­
ondary regulator are under a positive pressure
(about 11 inches water column). Gas pressure at
the outlet side of the secondary regulator, howev­
er, is a negative pressure and can draw flame
inside a line or fitting and cause an explosion.
6.6
The generator exhaust system must be safely and prop­
erly
installed. Only approved mufflers and other^
exhaust system parts mu.st be used. A properly installed
exhaust system must be vaf)or tight, quiet and corn-
jrletely safe.
The jt ri-’cmh r siiqinfi giro:- off DEADLY carbon
luon'i’uih <jci ihiruqb 'Г f xhauit system. This
dang-r.Ki fjas li bi- in '.ufficient concentra­
tions, tan c -u or even death.
Nevor u p , t f i e gen- afo* set with the vehicle
irijidu ariv А'Л i •rthm enclosed area. DO NOT
OPFP'UT nir t s flEF.A ПН IF ТЧЁ EXHAUST SYS-
lEiVl
!'i I L'-Tif'" ПГ NA - flfr.N DAMAGED. SYMP-
ТОМ' or •'.'GflON sVOiMOXlDf POISONING ARE
(d) iriai* ’ity li. .hiri’-c M ib) vomiting; (c)
twitdiing mu.des itl; biiobbing temples; (e)
dizzir-e ^t) Is'dduvd» . (g) vw akness; and (h)
sieeoifi'm К /Oi" -tfLAtJ'» OF THESE SYMP­
TOMS. iVJtiVF INFO Fhi ..H All IMMEDIATELY. IF
SYMPfOMS PLRSISi w T MLDiCAL HELP. Do not
operate the gt-rierato' until its exhaust system has
been inspected and properly repaired.
Do not place the generator into service until you have
properly tested the gas system for leaks. To lest the sys­
tem. you need a separate source of 12 volts DC to open
the gaseous fuel solenoid valve.
The leak test must comply fully with NFPA, Paragraph
318. All connections, hoses, valve regulators, fittings,
and other fuel system parts must be tested under gas or
air pressure of not less than 90 psi (620 kPa), while
using soap and water or an equivalent solution to check
------ M, CAUTION --------------
A Never tee the generator engine exhaust pipe into
the vehicle engine exhaust piping. This causes
excessive back pressure on the generator engine.
Also, water from one engine can damage the
other engine.
♦ 6.6.1
MUFFLERS AND SPARK ARRESTORS
This muffler meets code and standard requirements of
(he U.S. Forest Service. Use only mufflers and parts
approved by Geiierac. Any p)erson(s) installing an unap­
proved muffler, or an unapproved exhaust system part,
or modifying an exhaust system in any way that might
cause a hazard, is liable for any damage, injury or war­
ranty expense that might be caused by such unapproved
installation or modification.
30 Generac® Power Systems, tnc.