Generac Power Systems 00862-2 - Manual (Page 26)

INSTALLATION
Section 2 - Installation
Series QP55-G Recreational Vehicle Generator
Figure 2.6 - Types of Lock Seams ^ 2.2.4 ACOUSTICS
jflL
W
Ijl'
FOLD LOCKED STANDING
I I
* ■ OFFSET
DOUBLE LOCK DOUBLE SEAM
ACME LOCK
GORDON SEAM
r
LOCK SUM
STANDARI UP JOINT
After the compartment has been metal lined and
vapor sealed, line the compartment interior walls
and ceiling with an approved, nonflammable
sound insulating material. See Section 2.2.3.
DANGER
A Do not install any flammable material directly
above or around the compartment. Heat,
transferred through the compartment structure,
may be sufficient to ignite, char or discolor
seat cushions, fiberboard and other flammable
materials. You may need to use approved
nonflammable insulating materials in high
temperature areas.
♦ 2.2.3 SOUND INSULATING MATERIALS
Once installers have determined that a compart­
ment is properly constructed and metal lined, they
can add acoustical material. This may include addi­
tional sealant or insulating material, to reflect noise
away from the vehicle interior.
Sound insulating materials should be of a nonflam­
mable type. One excellent insulating material is a
1-inch (25 mm) thick fiberglass having a 2-pound
density. When fiberglass is used, its coated side
should face toward the compartment interior.
For additional noise abatement, the installer may
wish to consider the following:
• Using special sound insulating materials.
•
Construction of a special noise abatement
compartment.
NOTE:
Any method used to reduce noise must not
adversely affect the flow of cooling and ventilat­
ing air into or out of the compartment.
In addition to the effective use of sound insulating
materials, construction of a special noise abate­
ment compartment might be considered to reduce
noise levels. Such a compartment might be con­
structed as follows (Figure 2.7);
• Use 5/8-inch thick or 3/4-inch thick plywood in
the compartment.
• Construct the compartment floor of a double
thickness of 5/8-inch or 3/4-inch plywood.
• Line the compartment interior walls and floor, as
well as the underside of the floor, with 26-gauge
galvanized steel.
• Vapor seal all compartment seams and joints.
• Over the galvanized steel lining, install a combi­
nation of acoustical materials as mentioned in
Section 2.2.3.
DANGER
à To prevent fire or explosion, do not install any
insulation or other absorbent materials on the
interior or underside of the compartment floor.
Seal all compartment door edges to prevent noise
leakage around the door perimeter.
Line the compartment door interior (except for air
openings) with suitable, fireproof sound insula­
tion (such as 1-inch (25 mm) thick fiberglass
with a 2-pound density).
Figure 2.7 - Typical Noise Abatement
DANGER
A Do not install sound insulation or any
fflSa absorbent material on the compartment floor
interior. Such materials will become soaked
with combustible or explosive vapors and
liquids and will become a fire hazard.
Using a combination of sound insulating materials
can often reduce noise more effectively than a sin­
gle material. For example, a sheet of lead or visco­
elastic material, along with a layer of other acousti­
cal material, is more effective than when a single
material is used.
24 Benerac* Power Systems, Inc.