Westerbeke WPDS-20 Betreibershandbuch Seite 43
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Fresh water is pumped through the engine by a belt-driven fresh water circulating pump, absorbing heat from
the engine. The fresh water
coolant circulates through the engine's block absorbing heat, then passes
through the thermostat into the exhaust manifold, to the heat exchanger where
it is cooled, and then
is
returned
to
the engine block through the suction side of the fresh water circulating pump. When the engine
is started
cold, external fresh water flow is prevented
by
the closed thermostat (although some fresh water
flow
Is
bypassed around the thermostat
to
prevent the exhaust manifold from overheating). As the engine
warms up, the thermostat
gradually opens, allowing full flow
of
the engine's fresh water coolant
to
flow un-
restricted
to
the external portion
of
the cooling system.
A. Fresh Water
Coolant (Antifreeze) Mixture.
A freshwater and antifreeze mixture
should be used year-round in the fresh water cooling system. Water,
when it freezes, expands sufficiently
to
split the heat eXChanger and crack the engine block. A water/an-
tifreeze mixture of proper concentration
will prevent freezing (see below for an antifreeze/water mixture chart).
Use soft water with few Impurities, such as tap water (potable water)
or
rainwater. Never use hard
or
foul
water. Use
of
hard water or water containing Impurities will lead
to
the collection
of
scale in the engine and
heat exchanger which
will reduce the cooling system's efficiency.
Antifreeze
of
poor
quality
or
without rust inhibitors will cause corrosion within the
COOling
system.
/>Jways
use antifreeze which
is
compatible with aluminum cooling system components and
is
made
by
a reliable
manufacturer. Never mix different brands
of
antifreeze.
Make sure that the
cooling system
of
the engine is well cleaned before adding antifreeze. Recommended an-
tifreeze for year round use is
ZEREX
or
PRESTONE with rust inhibitors.
In order
to
control the concentration of the mixture, mix the antifreeze and freshwater thoroughly before ad-
ding it
to
the cooling system.
Antifreeze
Concentration
Freezing
Temperature
ANTIFREEZE CONCENTRATION DATA
% 13 23 30 35
45
50 60
'F
23 14 5
-4
-22 -40
-58
('
C)
(-
5)
(-10) (-15)
(-
20)
(-
30)
(-
40)
(-
50)
NOTE: An antifreeze concentration should be selected on the basis
of
a temperature which
is
about
10' F (5'
C)
lower than the actual atmospheric temperature expected.
B.
Filling the Fresh Water System
A coolant recovery tank kit
is
supplied with each Westerbeke diesel engine. The purpose
of
this recovery
tank is
to
allow
for
engine coolant expansion and contraction, during engine operation, without the loss
of
coolant and without introducing air into the cooling system.
This
coolant recovery tank should be installed at,
or
above, engine manifold level, in a location where it can
be
easily monitored and where coolant can be easily added if needed (see the figure below). A stainless
steel mounting bracket is supplied with each kit along with a 3D-inch length
of
clear plastic hose and clamps
to
connect the hose between the engine's manifold fitting
to
the hose spud on the base
of
the recovery tank.
43
Westerbeke Diesel
Engines
- WESTERBEKE 1
- SAFETY PRECAUTIONS 2
- Westerbeke Diesel Engines 3
- COCKPIT 4
- LIFTING 5
- 90' 8
- 6" 9
- ." 10
- . " 10
- '.': 13
- ', 13
- ' 16
- Thermostart 17
- FITTING 21
- Mechanical Fuel Lift Pump 22
- Fuel System 23
- Fuel Filter 25
- Prer,eat Solenoid 27
- Circuit Breaker 27
- *'14 L T, BLUE 29
- '*'14 GREEN 29
- ~~'b 30
- '§l. 31
- ~WARNINGI 33
- === 34
- Stand Pipe 35
- Cold Start Aid 35
- SIABI.: 36
- (77 - 88'C) 37
- 5' 38
- -.:::::.----...>r=~ 39
- 130-140' F range 40
- % 13 23 30 35 43
- COO~ANT 44
- ," 48
- :=::::= 49
- DIPSTICK 50
- : ' 51
- (8). In this situa 52
- + 000 - 100) at full open 53
- Introduction 54
- Westerbeke 54
- Engines 54
- ~~~f~e-f: 59
- SPECIFICATIONS 61
- Westerbeke Diesel 62
- 68
- Clrcu~ 72
- PARTS LIST 73
- ---'ii!l 76
- ~~~~~______ 78
- :!s---12 80
- MANIFOLD 84
- "\ 88
- .''\ 90
- & 36 91
- 75~~.3= 96
- ------' 98
- '~ 100
- '" 102
- :!;L;dv1 103
- ~:>e 112
- ~ESTERBEKE 114
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