Installation manual
WATER
HEATER
WATER
HEATER
INSTALLATIONS
This engine is equipped with connections for the plumb-
ing
of
engine coolant to heat an on-board water heater.
The water heater should be mounted in a convenient lo-
cation either in a high or low position in relation to the
engine, so that the connecting hoses from the heater to
the engine can run in a reasonably direct line without any
loops which might trap air.
OIL
COOLER
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HEATER
BELOW
THE
ENGINE
Hoses should rise continuously from their low point at
the heater to the engine so that air will rise naturally
from the heater to the engine.
If
trapped air is able to rise
to the heater, then an air bleed petcock must be installed
at the higher fitting on the heater for bleeding air while
filling the system.
NOTE:
If
any portion
of
the heating circuit rises above
the engine's own pressure cap, then a pressurized
(aluminum) remote expansion tank (Kit #024177)
must
be installed in the circuit to become the highest point.
Tee the remote expansion tank into the heater circuit,
choosing the higher
of
the two connections
for
the return.
Tee
at
the heater,
and
plumb a single line up to the tank's
location and the other back to the engine's return. Install
the remote expansion tank
in
a convenient location
so the fresh water coolant level can easily be checked. The
remote expansion tank 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 in-
stalled after the engine's cooling system is filled with
coolant. Finish filling the cooling system from the remote
tank after the system is filled and is free
of
air and exhib-
its 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 it rises continu-
ously from the heater to the tank, enabling any air in the
system to rise up to the tank and out
of
the system.
REMOTE
EXPANSION
TANK
1124117
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HEATER
ABOVE
THE
ENGINE
NOTE:
An
air bleed petcock is located on the engine's
heat exchanger. Open this petcock when filling the en-
gine's fresh water system to allow air
in
the exchanger to
escape. Close tightly after all the air is removed.
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WESIERBEKE
I
Engines
&
Generators
22