Section 2 – Installation

Recreational Vehicle Generator

Holes and openings made in the compartment walls to allow for the passage of electrical conduit, conductors, hoses, cables, etc., into the vehicle liv- ing 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 2.6. Installer constructed compartments typically utilize a standard lap joint.

mable type. One excellent insulating material is a 1- inch (25 mm) thick fiberglass having a 2-pound den- sity. When fiberglass is used, its coated side should face toward the compartment interior.

DANGER

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 material. For example, a sheet of lead or visco-elastic material, along with a layer of other acoustical mate- rial, is more effective than when a single material is used.

Figure 2.6 – Types of Lock Seams

‹ 2.2.4 ACOUSTICS

 

 

For additional noise abatement, the installer may

 

wish to consider the following:

 

• Using special sound insulating materials.

 

• Construction of a special noise abatement com-

 

partment.

 

NOTE:

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

Do not install any flammable material directly above or around the compartment. Heat, trans- ferred through the compartment structure, may be sufficient to ignite, char or discolor seat cush- ions, fiberboard and other flammable materials. Use approved nonflammable insulating materi- als in high temperature areas.

‹2.2.3 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 seal- ant or insulating material, to reflect noise away from the vehicle interior.

Sound insulating materials should be of a nonflam-

24

Any method used to reduce noise must not adversely affect the flow of cooling and ventilating air into or out of the compartment.

In addition to the effective use of sound insulating materials, construction of a special noise abatement compartment might be considered to reduce noise levels. Such a compartment might be constructed 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 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 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

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.

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Generac Power Systems 004700-00 owner manual ‹ 2.2.4 Acoustics, ‹ 2.2.3 Sound Insulating Materials

004700-00 specifications

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