Westerbeke BTDA 15.0 Operator's Manual & Installation Manual page 26

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figure 3.13.5: Siphon Break
ID~tallatioD
For installations where the exhaust manHold/water-injected exhaust elbow is close to or
below the vessel's water line, provisions
~
be made to install a siphon-break or a vent
in the raw water supply hose to the water-injected exhaust elbow. (figure 3.13.5) This
stops the flow of raw water that runs through the raw water cooling system from filling the
exhaust and engine cylinders when the engine is shut down. This raw water supply hose
~
be looped above the water line. This siphon-break or vent
~
always be above
the water line during all angles of vessel operation to prevent siphoning. The vent, when
used,
~
have its vent hose or tube routed so it can remain above the water line and
empty of water when the engine is shut down. This allows air to enter through this vent
to prevent siphoning.
15.0KWBTDA
Dry stack-type exhaust systems (figure 3.13.6)
must
be attached to the generator engine's
exhaust manHold by means of a flexible connector pipe. This system
~
be properly
supported and insulated to prevent water from entering into the engine's cylinders. Provisions
must be made for discharging the engine's raw cooling water .
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figure 3.13.6: Dry Stack Exhaust
24
Westerbeke Generators