Manual PowerTech PTRV- 8 KSI (page 40 of 51) (English)

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GENERATOR COMPARTMENT SIZE

In planning the size of the generator compartment or bay allow for the minimum clearance

necessary to adequately cool the generator set. The thickness of insulation and sound deadening material

used to line the compartment must be taken into consideration when planning this clearance. To

maintain minimum clearance it may be necessary to enlarge the compartment. The generator set must be

securely fastened to avoid unwanted movement from vibration and road shock. If the unit is equipped

with a mounting tray the tray is usually supported on the ends by angle iron and has a full door for

service access. Be sure to use all mounting holes in the tray to secure the tray to the vehicle support

structure. Units not equipped with mounting tray are secured by attaching Genset mounts (two in front,

two in rear) directly to the vehicle frame. Skid mounted units can either be affixed to a tray for tray

mounting or attached directly to the vehicle frame. The generator is easily removed from the coach if a

carriage with rollers is incorporated into the support structure. When designing the compartment allow

sufficient access for routine maintenance and for removal when major service is required. Also keep in

mind that the compartment door must have air intake opening having a free area equal to or greater than

that specified under the “Air Requirements” section of this manual. Make sure that the compartment is

vapor tight and completely sealed off from the inside of the vehicle to prevent exhaust or other items

from entering the vehicle. Avoid road splash and the possibility of igniting combustible materials

beneath the coach by enclosing all unnecessary free space beneath the generator compartment.

Line the compartment with a good sound deadening material. The material selected must be

fireproof or highly fire resistant. An available type of 3-layer foam material is very efficient for

absorbing sound. This type of material is easily cut to size with scissors and can be quickly installed

using special fire resistant adhesive which bonds the material to almost any clean dry surface. Other

materials such as fiberglass insulation with heat barrier have also been used successfully in mobile

installations.

NOTE: Since a Genset is flexibly mounted the minimum clearance of one inch (3 inches at the radiator

end) will assure that the sides of the compartment and the set will not rub while the set is in operation or

while the vehicle is in transit.

COMPARTMENT FRAMING

The generator must be bolted to a metal frame, which is either bolted or welded to the frame of

the vehicle. This frame must be designed to withstand a minimum force of 5Gs in any direction. The

frame must support the entire base plate around the outer perimeter and center section. Additional

framing may be required if excessive vibration occurs.

AIR REQUIREMENTS

Each engine is equipped with a high water temperature shutdown switch, which will

automatically shut down the set if the operating temperature climbs too high. To prevent the generator

set from shutting down make sure the compartment openings are large enough to allow adequate

circulation of cooling air. The minimum free air opening in the compartment door is 400 sq. in. or 2580

sq. cm. Remember that louvers, screens and protective grills will restrict airflow. A relatively open mesh

screen will restrict airflow as much as 45%. The intake opening must be increased to compensate for

such restrictions.

NOTE: Ambient temperature is defined as the generators normal operating temperature within its

mounting area. In an RV application this area is referred to as a compartment or bay.

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PowerTech PTRV- 8 KSI Manual

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