Water Heater - Westerbeke 44A FOUR-35 C THREE Operator's Manual

WATER HEATER
WATER HEATER INSTALLATIONS
This engine is equipped with connections for the plumbing of
engine coolant to transfer heat to an on-board water heater.
The water heater should be mounted in a convenient location
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.
-==~~~"
THESE HOSES ARE
CONNECTED IF THERE
IS NO WATER HEATER.
\~
I
.J
,
I
WATER HEATER
BELOW 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 hel:\ter,
then an air bleed petcock must be installed at the higher fit-
ting 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 conve-
nient location so the 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. Remove and store the plastic
recovery tank
if
it has been already installed.
The pressure cap on the engine's manifold should be
installed
aft~r
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 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 it rises continuously from the heater to the tank,
enabling any air in the system to rise up to the tank and out
of the system.
NOTE: An air bleed petcock is located on the engine's
heat exchanger. Open this petcock when filling the engine's
coolant system to allow air in the exchanger to escape.
Close tightly after all the air is removed.
Engines & Generators
24