COOLING
SYSTEM
Standard Radiator Cooling, uses a set mounted
radiator and engine driven pusher type fan to cool
engine water jacket. Air travels from the generator
end of the set, across the engine and out through the
radiator. An integral discharge duct adapter flange
surrounds the radiator grille.
Heat Exchanger Cooling (optional), uses a shell and
tube type heat exchanger instead of the standard
radiator and fan. Engine jacket coolant circulates
through the shell side of the heat exchanger, while
raw cooling water is pumped through the tubes.
Engine coolant and raw water do not mix. This type of
cooling separation is necessary when the raw water
contains scale forming lime, or other impurities.
This system reduces set enclosure airflow re-
quirements and noise levels. Proper operation
depends upon a constant supply of raw waterfor heat
removal.
The engine coolant side of the system may
be protected from freezing; the raw waterside cannot.
See Figure 9 for typical installation.
EXPANSION
TANK
-»—
HEAT EXCHANGER
Tn ENGINE
FROM
ENGINE
J
DRAIN
SOLENOID
VALVE
(OPENS WHEN
SET IS RUNNING)
ADJUSTABLE
VALVE
(RATE OF FLOW) ase
I^
-
CRATER
IN
STRAINER
FIGURE
9.
TYPICAL
HEAT
EXCHANGER
SYSTEM
Standpipe Cooling (optional) substitutes a mixing
(tempering) tank for the standard radiator and fan.
Cooling water circulating through theenginejacket is
mixed with raw water in the tank. Because raw water
flows through the engine jacket, it must not contain
scale forming impurities or fouling of the engine
water passages will occur. Fouling results in engine
overheating and costly repair bills.
This system reduces set enclosure airflow re-
quirements and noise levels. Proper operation is
dependent on a constant supply of cooling water. The
system cannot be protected from freezing. See Figure
10.
ANTI-SIPHON — r
MIXING
TANK -
STAND
PIPE
SOLENOID VALVE
(OPEN WHEN
SET IS RUNNING)
WATE
I
DRAIN
FROM
ENGINE
• TO ENGINE
• ADJUSTABLE VALVE
(RATE OF FLOW)
STRAINER
FIGURE
10.
TYPICAL
STANDPIPE
SYSTEM
Remote Radiator Cooling (optional), substitutes a
remote mounted radiator and an electrically driven
fan,
for the set mounted components. Removal of the
radiator and fan from the set reduces set enclosure
airflow requirements and noise levels without forcing
dependence on a continuous cooling water supply.
The remote radiator system can be completely
protected against freezing.
This system must be designed to meet specific
requirements of the application.
Water Jacket Heater, (optional) may be installed to
keep engine coolant warm while engine is shut down.
It heats and circulates the coolant within the engine,
which reduces start-up time and engine wear caused
by cold starts. It is electrically operated and ther-
mostatically controlled.
15
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