Section 2 – Installation

Recreational Vehicle Generator

2.3 COOLING AND VENTILATING AIR

NOTE:

It is absolutely essential that an adequate flow of air for cooling, ventilating and engine combustion be supplied to the generator set. Without sufficient airflow, 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 combustion. The installer also must provide for a path for exhausting the cooling air to the exterior of a compartment, 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.

‹2.3.1 GENERATOR AIRFLOW

Engine operation drives cooling fans for the two-stage cooling air system. A pressure fan draws cooling air into the top 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 col- lector pan at the base of the unit. This heated air (although cooler than exhaust muffler) is then deflected out the bottom toward the ground.

Screening, louvers or expanded metal that cover air openings restrict airflow. Compensate for this by making the actual air opening proportionately larger. See the "Compensating for Restrictions" sec- tion.

Figure 2.10 – Air Inlet in Compartment Door

NOTE:

Be sure to meet the minimum clearances illus- trated in Figure 2.4.

When the unit is installed on a suspended mounting system, one of several different methods of supplying airflow may be used as follows:

Figure 2.9 – Airflow Through Engine/Generator

• Provide a door in the vehicle skirt having an air

 

 

 

 

 

 

 

 

inlet opening (Figure 2.11).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 2.11 – Suspended Mount: Inlet Door

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

‹2.3.2 COOLING AIR INLET OPENINGS

The minimum size of the air inlet opening, whether the generator is housed in a conventional compart- ment or not, is at least 100 square inches (see Figure 2.10). This rule applies whether inlet air is brought in through an opening in the compartment door, an opening in the vehicle skirt, through duct- work, or by any other means.

•Using ductwork (Figure 2.12). The installer must be sure air is available to the top of the generator since air inlets are located at the top.

•By providing an opening in the vehicle skirt and space behind the generator for cooling airflow (Figure 2.13). Recommended clearance behind the back of the generator is at least 1/2 inch (13 mm).

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Guardian Technologies 02010-2 Cooling and Ventilating AIR, ‹ 2.3.1 Generator Airflow, ‹ 2.3.2 Cooling AIR Inlet Openings
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04164-3, 02010-2 specifications

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