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26 Generac
®
Power Systems, Inc.
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.
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
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.
NOTE:
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
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.
DANGER
GENERAC OHVI INDUSTRIAL ENGINE
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GENERAC
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RV SERVICE LOCATOR:
1.800.333.1322
QUIETPACT 40G
*
SERVICE ACCESSPANEL
OIL LEVEL: CHECK DAILY
AIR FILTER: CLEAN PREFILTER
EVERY 100 HOURS.
REPLACE ELEMENT
EVERY 250 HOURS.
OIL & OIL FILTER:
CHANGE EVERY 100
(IF NECESSARY)
EVERY 500 HOURS.
HOURS. REPLACE PLUGS
PLUGS EVERY 100
INSPECT & CLEANSPARK PLUGS:
REPLACEMENT INFORMATION
*
PERFORM MORE OFTEN IN DUSTY CONDITIONS
AIR FILTER LOCATED BEHIND PANEL.
MAINTENANCE SCHEDULE
AIR FILTER P/N: 0D3262
070185OIL FILTER P/N:
SPARK PLUG P/N: 072347
OIL CAPACITY WITH FILTER:
0.8L/0.84QT
TEMPERATURE SAE VISCOSITY
32˚F AND HIGHER
10˚F TO 100˚F
0˚F TO 80˚F
-20˚F TO 50˚F 5W-30
10W-30
15W-40
30
WHEN SERVICE OR PARTS ARE NEEDED IN
THE USA OR CANADA, CONTACT THE GENERAC
SERVICE LOCATOR AT 1-800-333-1322.
HOURS. (OR ANNUALLY)
PREFILTER P/N: 0D4511
FUEL FILTER P/N: 0D7515
FUEL FILTER: CHANGE EVERY 400
HOURS. (OR ANNUALLY)
*
*
PRIME
FUEL
STOP
START
30A
C.B.
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FUSE
CONTROL CENTER
7.5
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Fuel Pump & Fuel Filter
(Behind Access Panel & Air Filter)
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OHVI IN
DUST
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QUIETPACT 40G
RV S
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DANGER
Section 2 – Installation
QUIETPACT 40G Recreational Vehicle Generator