Generac 00941-4 owner manual Cooling and Ventilating AIR, Acoustics, Generator AIR Flow

Section 2 – Installation

IMPACT-36 plus II Recreational Vehicle Generator

◆2.2.5 ACOUSTICS

If excessive noise levels should become a problem, the installer may wish to consider the following:

•Using special sound insulating materials.

•Construction of a special noise abatement com- partment.

IMPORTANT: 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 2.8):

•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 selected combination of acoustical materials as mentioned in “Sound Insulating Materials.”

Figure 2.8 — Typical Noise Abatement

Compartment

•Line the compartment door interior (except for air openings) with suitable, fire proof sound insula- tion (such as 1-inch thick fiberglass with a 2- pound density).

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 may also 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 must also 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, flammable or explosive gases.

2.3COOLING AND VENTILATING AIR

◆2.3.1 GENERATOR AIR FLOW

Engine operation drives cooling fans for the 2-stage cooling air system. A pressure fan draws cooling air into the top of generator and into the side of the con- trol panel (Figure 2.9). This air flow 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 pan at the base of the unit. This heated air (although cool- er than exhaust muffler) is directed across the muf- fler to cool it. The heated air flow is then deflected out the bottom toward the ground.

Figure 2.9 — Air Flow Through Engine-

Generator

DANGER

Do not install any insulation or other

! absorbent materials on the interior or under- side of the compartment floor.

• Seal all compartment door edges to prevent noise leakage around the door perimeter.

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