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 bf
cooling separation
is
necessary when
the raw
water
contains scale forming lime and other impurities.
This system reduces
set
enclosure airflow and noise
levels.
Proper operation depends upon
a
constant
supply
of raw
water
for
heat removal.
The
engine
coolant side
of the
system
may be
protected from
freezing
the raw
water side cannot.
See
Figure
7 for
typical installation.
c
EXPANSION
TANK
HEAT EXCHANGER
-
-rn
ENGINE
FROM
ENGINE
M
DRAIN
SOLENOID
VALVE
(OPENS WHEN
SET
IS
RUNNING)
ADJUSTABLE
VALVE
(RATE
OF
FLOW)
zJ
-
L
WATER
IN
STRAINER
This system reduces
set
enclosure airflow
re-
quirements
and
noise levels. Proper operation
is
dependent on aconstantsupplyof cooling water. The
system cannot be protected from
freezing.
See Figure
8.
ANTI-SIPHON
—I
SOLENOID VALVE
(OPEN WHEN
SET
IS
RUNNING)
N
STAND
PIPE
STRAINER
DRAIN
: FROM
ENGINE
•TO ENGINE
ADJUSTABLE VALVE
(RATE
OF
FLOW)
Rev.
FIGURE
8. STANDPIPE (TYPICAL)
FIGURE
7. HEAT EXCHANGER (TYPICAL)
Standpipe Cooling (optional) substitutes
a
mixing
(tempering) tank
for the
standard radiator
and fan.
Cooling water circulating through the engine jacket
is
mixed with
raw
water
in
the tank. Because raw water
flbws through
the
engine jacket,
it
must
not
contain
scale forming impurities
or
fouling
of the
engine
water will occur. Fouling results
in
engine
overheating
and
costly repair bills.
Remote Radiator Cooling (optional), substitutes
a
remote mounted radiator and
an
electrically driven
fan,
for
the set mounted components. Removal ofthe
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.
14-
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