Westerbeke 21A Manual de instalación descargar pdf (Pagina 39)

WATER HEATER CONNECTIONS

REMOTE EXPANSION TANK

The pressure cap on the engine’s manifold should be

installed 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 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: Air bleed petcocks are located on the engine’s heat

exchanger and on the thermostat housing. Open these pet-

cocks when filling the engine’s fresh water system to allow

air in the coolant circuit to escape. Close tightly after all the

air is removed.

INSTALLATION

Water heater hose connections vary from one engine to

another. Refer to your WESTERBEKE Operators Manual for

your engine’s water heater connections.

NOTE: Water heater connections are not standard on marine

generator products.

WESTERBEKE marine engines are equipped with

connections for the plumbing of engine coolant to heat 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 with-

out any loops which might trap air.

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 closed cooling system pressure cap, then a

pressurized (aluminum) remote expansion tank 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 t ank is not used when the

remote expansion t ank kit is inst alled, since this t a n k

serves the same function. The remote expansion tank has

an overflow fitting that should be directed by a hose to an

area where any overflow will not cause damage.

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Westerbeke 21A Manual de instalación Pagina 39

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