Operator`s manual
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 wtth each Westerbeke diesel engine. The purpose
of
this recovery
tank is
to
allow
lor
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 30-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.
FUNCTION
OF
MANIFOLD
PRESSURE
CAP
From
Coolant Tank
COOLANT RETRACTION
to Coolant
Tank
COOLANT EXPANSION
Coolant from the engine, when heated during engine operation, will expand, lifting the spring-loaded manifold
pressure cap, and enter the recovery tank by way
of
the hose connecting the recovery tank
to
the manifold.
When the engine
is
shut
down
and cools, a small check valve in the pressure cap
is
opened by the contrac-
tion
olthe
engine coolant, allowing some of the coolant in the recovery tank
to
be drawn back into the engine's
cooling system, Iree of air and without loss. Periodically check that the passage (A) between the
90°
litting
on the
manifold and the filler neck
in
the manifold
is
clear so coolant can flow
in
either direction.
53
Westerbeke Diesel Engines