Westerbeke 12C- TWO Operator's Manual page 30

DOMESTIC HOT WATER
TANK CONNECTIONS
HOT WATER HEATER ABOVE THE ENGINE
If any portion of the heating circuit rises above the engine's
own pressure cap, the a pressurized (aluruinum) remote
expansion
tank
must be installed in the circuit to become the
highest point. The remote expansion
tanks
part number is
24177. Tee the remote expansion
tank
into the heater circuit .
at the heater connection, choosing the higher of the two for
the retum. Tee right at the heater and plumb a single line up
to the
tanks
location and the other back to the engine's flow
control. Install the remote expansion
tank
in a convenient
location such as in a sail locker so the fresh water coolant
level can easily be checked. The remote expansion
ian!<:
will
now serve as a check and system
fill
point. The plastic
coolant recovery
tank
is not used when the remote expansion
tank kit is installed, since this tank serves the same function.
The pressure cap on the engine's manifold should be
installed once the engine's cooling system is filled with
coolant. Finish filling the cooling system from the remote
taDk
once the system is filled and is
free
of air and eXhibits
good coolant circulation. During engine operation, checking
the engine's coolant should be done at the remote tank and
not at the engine manifold cap.
The hose connection from the heater to the remote
expansion tank should be routed and supported so as to rise
continuously from the heater to the tank, enabling any air in .
the system
to
rise. .
PRESSURE CAP IS RATED
LOWER THAN MANIFOLD. CAP
REMOVE THE BY-PASS HOSE
~.
..
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ENGINE HEAT
. Englnes.& Generators
23
HEATER COILS ABOVE
PHt:>OUlit
CAP ON ENGINE MANIFOLD
HEATER ABOVE ENGINE .....