Installation Manual

Chapter 6 N40475
Page 18
Keel cooling system
This engine may be purchased in a form suitable
for keel cooling, using two separate coolers, one for
the cylinder jacket circuit and one for the aftercooler
circuit. Figure 2 shows the connections provided for
the coolers. The requirements for each section are as
follows:
Models M190C M216C M250C M300C
Cylinder Jacket Circuit
Heat rejection /kW.
102 134 146 173
Design value for the
water temperature
at the exit from the keel
cooler /
O
C.
65 65 65 65
Design value for the
water ow through the
cooler.
*Pipework to suit 45mm
(1.75”) bore hose
connections /l min
-1.
174 201 201 201
Thermostat opening
temperature /
O
C.
85 85 85 85
Aftercooler Circuit
(Includes gearbox oil
cooler)
Heat rejection /kW.
32 36 42 44
Design value for the
water temperature
at the exit from the cooler
/
O
C.
38 38 38 38
Design value for the
water ow through the
cooler.
Pipework to suit 32mm
(1.25”) bore hose
connections /l min
-1
119 133 133 133
Note: Under extreme conditions the water ow in the
jacket circuit may increase to 182 l/min (40 gallons/
min.)
The pipework between the engine and coolers should
be as short and direct as is possible, but should be
sufciently exible to allow the engine to move on it’s
exible mountings. The layout should discourage the
formation of air locks, and venting points should be
provided wherever an air lock is likely to occur.
The keel cooling system should normally be lled with
a water/antifreeze mixture containing 50% antifreeze.
This mixture is necessary even in warm climates, as
the anti freeze contains corrosion inhibitors which
protect the engine cooling system.
Figure 3 shows the items not supplied with the engine
as unshaded.
Figure 2
1. Engine
2. Thermostat
3. Fresh water pump
4. Aftercooler
5. Gearbox oil cooler
6. Exhaust manifold
7. Remote tank
8. Cylinder jacket grid
cooler
9. Aftercooler grid cooler
10. Auxiliary water pump
11. Integral oil cooler
12. Bleed
13. Part of supplied
remote kit
Figure 3