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TP-6335 9/04 Cooling System 5
Section 3 Cooling System
3.1 Air Requirements
Air flow around the generator set is necessary for
adequate cooling. See the current generator set
specification sheet for air requirements. The air intake
silencer/cleaner provides combustion air to the engine.
See Figure 3-1 for allowable intake restriction. The
engine/generator performance will be adversely
affected if these guidelines are neglected. Follow these
guidelines to optimize generator set performance.
Model Normal Intake Restriction
10/13/15ERG 0.06 psi (0.50 in. H
2
O)
Figure 3-1 Intake Restriction
3.2 Block Heaters
Block heaters are available as installed accessories on
these generator sets. Use block heaters in applications
where the generator set is subject to temperatures
below 16_C(60_F). Connect the block heater to a
power source that is energized when the generator set
is not running.
Note: Block heater damage. The block heater will fail if
the energized heater element is not immersed in
coolant. Fill the cooling system before turning on
the block heater. Run the engine until it is warm
and refill the radiator to purge the air from the
system before energizing the block heater.
3.3 High Water Temperature Switch
Each generator set includes a high water temperature
shutdown switch that automatically shutsdown the set if
operating temperatures climb too high. Follow the
guidelines described in Section 3.1 to prevent
shutdowns.
3.4 Unit-Mounted Radiator Cooling
The generator set is equipped with a unit-mounted
radiator common cooling system.
3.4.1 System Features
The system’s major components include an
engine-driven fan and circulating water pump, a
radiator, and a thermostat. The pump circulates water
through the engine until it reaches operating
temperature. Then, the engine thermostat opens,
allowing water circulation through the radiator. The
thermostat restricts water flow as necessary to prevent
overcooling. The fan blows air from the engine side of
the radiator across the cooling surface.