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PowerTech PTRV- 3 RR Manual

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GENERATOR COMPARTMENT INSTALLATION
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. The
generator set must be securely fastened to avoid unwanted movement from vibration and road shock.
Be sure to use all mounting holes in the base pan to secure the unit to the vehicle support structure.
When designing the compartment allow sufficient room for routine maintenance of the unit and easy
removal when major service is required. Also keep in mind that the compartment must include 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 vapors from entering the vehicle. To avoid road splash and the
possibility of igniting combustible materials beneath the coach, enclose 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. A 3-layer type foam insulating material is very efficient for absorbing
sound. This type of material is easily cut to size and can be quickly installed using special fire resistant
adhesive which bonds the material to most clean dry surfaces. Other materials such as fiberglass
insulation with heat barrier may also be used.
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 unit if the operating temperature exceeds the limit. 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 is 44 sq. in. 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: These minimum clearances between the generator enclosure and the compartment walls will
assure adequate cool air circulation.
1” -------- Service Door
1” -------- Right Side
1” -------- Top
1” -------- Rear
2 ¼” ----- Left Side
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.
5
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