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2.3
COOLING AND VENTILATING AIR
It is absolutely essential that an adequate flow of air
for cooling, ventilating and engine combustion be
supplied to the generator set. Without sufficient air-
flow, the engine/generator quickly overheats. Such
overheating can cause serious operating difficulties
and also may cause fire and personal injury. The
installer must make sure that sufficient air is avail-
able to the generator for cooling, ventilating and com-
bustion. The installer also must provide for a path
for exhausting the cooling air to the exterior of a com-
partment, if so equipped.
DANGER
Never use discharged cooling air for heating or permit
such air to enter the vehicle interior. This air contains
deadly carbon monoxide gas and other poisonous, flam-
mable or explosive gases.
2.3.1 GENERATOR AIRFLOW
Engine operation drives cooling fans for the two-stage
cooling air system. A pressure fan draws cooling air
into the bottom right side of the generator (Figure 2.9).
This airflow cools the engine/generator and electronic
components. The second part of the cooling system, a
suction fan, draws air that is heated from a hot engine
into a collector compartment at the left side of the unit.
This heated air (although cooler than exhaust muffler)
is then deflected out the bottom toward the ground.
Figure 2.9 – Airflow Through Engine/Generator
26 Generac
®
Power Systems, Inc.
Section 2 – Installation
QUIETPACT 40G Recreational Vehicle Generator
2.3.2 TESTING THE INSTALLATION
Generac recommends testing the installation to be
sure adequate cooling airflow is available to the unit
before placing the unit into service. If the unit shows
signs of overheating, you will need to enlarge the air
openings. Never place a unit into service until
absolutely certain that cooling and ventilation is ade-
quate.
You must test the installation, especially if you
bring in air from below the generator set.
2.4
GASOLINE FUEL SYSTEM
The installation of a gasoline fuel system (Figure
2.10) for a recreational vehicle generator set must
comply with applicable codes, standards and regula-
tions. The entire fuel system must be completely free
of leaks. There must be no possibility of gasoline
vapors entering the vehicle interior.
Figure 2.10 – Generator Fuel System
GENERAC
OHVI
POWERED
GENERAC OHVI INDUSTRIAL ENGINE
TM
QUIETPACT 40G
RV SERVICE LOCATOR:
1.800.333.1322
DANGER
Gasoline is highly flammable, and its vapors are
explosive. Comply with all codes, standards and
regulations pertaining to gasoline fuel systems
used in recreational vehicle generators.
Properly install and maintain the fuel system
and keep it entirely free of leaks. Gasoline
vapors must not enter the vehicle interior.
Factory installed generator fuel system components
include (a) fuel filter, (b) 12-volt DC electric pump, (c)
engine carburetor, and (d) interconnecting lines and
fittings. Connect a fuel supply line to the fuel filter
inlet. Use a flexible length of approved fuel hose
between the fuel filter inlet connection and rigid fuel
lines.
NOTE:
CONTROL CENTER
S T A R T
F U E L
S T O P
P R I M E
F U S E
7.5
A
S E R V IC E A C C E S S
AIR FILTER LOCATED BEHIND PANEL.
MAINTENANCE SCHEDULE
OIL LEVEL:
AIR FILTER:
OIL & OIL FILTER:
SPARK PLUGS:
FUEL FILTER:
REPLACEMENT INFORMATION
PREFILTER P/N:
AIR FILTER P/N:
OIL FILTER P/N:
SPARK PLUG P/N:
FUEL FILTER P/N:
OIL CAPACITY WITH FILTER:
TEMPERATURE
32˚F AND HIGHER
10˚F TO 100˚F
0˚F TO 80˚F
-20˚F TO 50˚F
WHEN SERVICE OR PARTS ARE NEEDED IN
THE USA OR CANADA, CONTACT THE GENERAC
SERVICE LOCATOR AT 1-800-333-1322.
Fuel Pump & Fuel Filter
(Behind Access Panel & Air Filter)
C . B .
3 0 A
P A N E L
CHECK DAILY
CLEAN PREFILTER
EVERY 100 HOURS.
*
REPLACE ELEMENT
EVERY 250 HOURS.
*
CHANGE EVERY 100
HOURS. (OR ANNUALLY)
*
*
PERFORM MORE OFTEN IN DUSTY CONDITIONS
INSPECT & CLEAN
PLUGS EVERY 100
HOURS. REPLACE PLUGS
EVERY 500 HOURS.
(IF NECESSARY)
CHANGE EVERY 400
HOURS. (OR ANNUALLY)
0D4511
0D3262
070185
072347
0D7515
0.8L/0.84QT
SAE VISCOSITY
30
15W-40
10W-30
5W-30
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