Operator`s manual
Hoses should rise continuously from their low point at the heater
to
the engine so that trapped air will rise
naturally from the heater to the engine. If trapped air
is
able 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. Avoid loops in hose
runs which will trap air.
Note:
If any portion
of
the heating circuit rises above the engine's own pressure cap, then a
pressurized (aluminum) remote expansion tank
must be installed in the circuit
to
become the
highest point. The remote expansion tank's part number
is
24177. Install the remote expan-
sion tank in a convenient location such as in a sail locker so the fresh water coolant level can
easily
be c hec ked.
The cap on the engine mounted expansion tank should not be opened once the remote system
is
installed
and filled.
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 lank, enabling any air in the system to rise.
Refer
to
the illustrations on the previous page.
59 Westerbeke Diesel Engines