TP-5594 5/95 Installation 6-13
Remote Radiator Cooling System
Use the following data in designing and installing the
generator set cooling system. To ensure a safe,
effective installation, be sure the cooling system
selected follows these parameters. Kohler Co. offers
radiator assemblies which meet these requirements
and adequately cool the generator. Select the radiator
assembly appropriate for the generator installation.
Duetothemultitudeofcoachmanufacturersandvariety
of generator installations, only general guidelines are
provided. Adapt these recommendations to the
installation. In a typical installation, the radiator
assembly is installed in the same compartment as the
generator. If the blower-fan radiator assembly is used,
cooling air is drawn across the generator and engine
and then through the radiator. If the suction fanradiator
assembly is used, the suction fan pulls cooling air
through the radiator and then past the generator set. If
the radiator assembly alone is used, the installer must
supply an electric blower or suction fan to circulate the
cooling air. See Figure 6-15 and Figure 6-16.
Depending on space limitations, the radiator can be
located in front of,adjacent to, or in a ventilatedlocation
remote from the engine (maximum distance from the
generator is 10 ft.). To prevent recirculation of heated
air, be sure to maintain a tight seal between theradiator
andthedischargechute. Generally,thedischargechute
opening should be approximately1 1/2 times the size of
the radiator core.
NOTE
If locating the radiator in a compartment separate from
the engine, remember the engine combustion air and
heatrejection requirements of the alternator andengine
block when designing the cooling system. Install two
supplemental cooling fans capable of 265 cfm (7.49
m
3
/min) to supply air to the generator compartment for
these requirements.
NOTE
If installing a non-Kohler radiator assembly, be sure the
radiator fan motor rotates in the correct direction and is
of the proper voltage.
If sizing a non-Kohler radiator, follow these general
guidelines for radiator selection.
Heat Rejection:
7 kW—638 Btu per min.
10 kW—942 Btu per min.
Cooling System Water Flow:
Typical: 5-6 gallons per min.*
Max. water temperature allowed:
230_ F
Connection Points to Radiator:
Radiator Inlet: 7 kW—1.25 I.D. Hose
10 kW—1.12 I.D. Hose
Radiator Outlet: 7 kW—1.12 I.D. Hose
10 kW—1.12 I.D. Hose
*If the application requires excessive runs between the
generator set and the remote radiator, check the water
flow. Be certain the radiator is sized accordingly.
NOTE
Thecooling systemfill(radiator orexpansiontank) must
be the highest point in the cooling system. See
Figure 6-17. If the cooling system fill is not located as
directed, cooling water will notcompletely fillthe engine
and result in overheatingof the engine and disablement
of the high water temperature shutdown switch.
A close relationship exists between the cooling system
designandthegeneratorcompartmentsize. Availability
of space is often the determining factor in cooling
system design. See Compartment Size section of this
manual prior to designing and installing the generator
cooling system.
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