Generac-power-systems 009600-5 Manuel d'utilisateur télécharger pdf (Page 26)

24 Generac

Power Systems, Inc.

• If constructing a compartment, line the exterior

(underside) of the compartment floor with 26-gauge

galvanized steel.

• All seams, splices and joints of the compartment

walls (unless vapor tight by design) should be

caulked to prevent poisonous, flammable or explo-

sive vapors from entering the vehicle interior.

NOTE:

Caulking must be done so that the caulking material

will stay in place permanently. Pressing such materi-

als as putty tape onto joints and seams is not accept-

able. A high quality silicone rubber base sealant is

recommended.

• Holes and openings made in the compartment walls

to allow for the passage of electrical conduit, conduc-

tors, hoses, cables, etc., into the vehicle living area

must be sealed vapor tight with silicone rubber base

sealant.

• If flexible metal conduit is used, it must be sealed

internally at the end where it terminates inside the

compartment’s electrical junction box.

NOTE:

Flexible metal conduit, due to its unique construc-

tion, is NOT vapor tight along its entire length.

• Seams and joints of the galvanized steel (whether

used as a liner or for the compartment itself) must be

lapped and mechanically secured. Such seams may

be manufactured, welded, bolted, riveted or screwed.

Manufactured lock seams are shown in Figure 6.6.

Installer constructed compartments typically utilize a

standard lap joint.

Figure 6.6 – Types of Lock Seams

• After the compartment has been metal lined and

vapor sealed, line the compartment interior walls and

ceiling with an approved, nonflammable sound insu-

lating material. See Section 6.2.3.

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.

6.2.3 SOUND INSULATING MATERIALS

Once installers have determined that a compartment is

properly constructed and metal lined, they can add

acoustical material. This may include additional sealant

or insulating material, to reflect noise away from the

vehicle interior.

Sound insulating materials should be of a nonflamma-

ble 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.

Do not install sound insulation or any 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 single mater-

ial. For example, a sheet of lead or visco-elastic materi-

al, along with a layer of other acoustical material, is

more effective than when a single material is used.

6.2.4 ACOUSTICS

For additional noise abatement, the installer may wish

to consider the following:

• Using special sound insulating materials.

• Construction of a special noise abatement compart-

ment.

NOTE:

Any method used to reduce noise must not adverse-

ly affect the flow of cooling and ventilating air into or

out of the compartment.

In addition to the effective use of sound insulating mate-

rials, construction of a special noise abatement com-

partment might be considered to reduce noise levels.

Such a compartment might be constructed as follows

(Figure 6.7, page 25):

• Use 5/8-inch thick or 3/4-inch thick plywood in the

compartment.

• Construct the compartment floor of a double thick-

ness 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 galva-

nized steel.

◆

Section 6 – Installation

PRIMEPACT 66G and 66LP Recreational Vehicle Generators

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