Preparation For Winter - Vetus WH20A Manuel D'utilisation Et D'installation

Introduction
Tap water in the calorifier inner tank is heated by engine coolant
which flows between the inner and outer tank.
Use
Proceed as follows before using the calorifier for the first time.
• Clean the inside of both inner and outer tank by rinsing with
clean tap water.
• Open the stop cock in the water pipe between pump and
tank. Open the hot water tap to release air from the tank and
it fills with water.
• Fill outer tank from the engine cooling system.
• Check all connections, pipes and fittings for leaks.
TAKE CARE
Stop the engine immediately if a leak occurs. Repair the
leak before restarting the engine.
• Stop the engine and check the coolant level. Top up if nec-
essary. The calorifier is now ready for use.
Heating
The engine has to run for a certain time before the tap water
heats up. The time required depends on the size of the calorifi-
er and the size of the engine.
WARNING!
The hot tap water can be very hot, temperatures up to
80˚C. are possible!
For safe use, always mix with cold water.
Electric Heating
When the engine is not running, water can be heated up to the
required temperature, or the temperature maintained by an
electric heating element, if fitted.
Heating up tap water in the calorifier tank by using the electric
heating element will take considerably longer than heating with
engine heat.
Information
The amount of heat created by an internal combustion
engine, and thus available for heating the calorifier, is
about the same as the engine power output. So an
engine which delivers 50 kW at the shaft will also provide
about 50 kW of heat! An electric heating element is only
0.5 or 1 kW.
WARNING!
Never switch on the electric heating element if the calorifi-
er tank is not completely filled with tap water.
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Preparation for Winter

When the ship's engine cooling system contains a coolant fluid
or an anti-freeze and water mixture with sufficient protection at
low temperatures, then the outer tank will not need to be
drained.
When the engine's cooling system contains ordinary water, this
will not provide any protection at low temperatures, so the outer
tank will have to be drained.
To do this, remove hose connections 'A' and 'B' and allow the
outer tank to drain empty. Protect the outer tank against corro-
sion by filling with anti-freeze.
The calorifier inner tank should always be drained. To do this,
remove the hose connections 'C' and 'D' and both plugs from
the non-return valve 'F'. Open the tap so that the pipes and
calorifier tank drain completely.
NEVER allow the engine to run when the inner tank has been
drained, or when the water tank is empty and the outer tank still
filled.
The inner tank should first be filled before the engine is used
after the winter period.
Installation
General
First study the Installation Drawing and the Piping Diagrams,
see Drawings on pages 16 and 17.
The highest point of the calorifier should always be at a lower
level than the ship's engine expansion tank, to ensure proper air
relief.
Install an extra expansion tank above the level of the level of the
highest point of the calorifier, when the calorifier is fitted above
the level of the engine expansion tank - see Drawing 4.
If the calorifier is installed considerably lower than then the
engine's expansion tank, the coolant water can start to circulate
when the engine has stopped. This will lead to very fast cooling
of the hot tap water. To prevent this, install a non-return valve -
see Drawing 5. A stop cock can also be used instead of a non-
return valve.
By fitting two stop cocks (one in the supply, one in the return) it
will be possible to run the engine in winter without filling the
calorifier with tap water, provided both stop cocks are shut off.
The calorifier outer tank is only suitable for use with engine
coolant fluid, anti-freeze or cooling water, but absolutely not for
salt water.
Installing the Fittings
On the tap water side of the calorifier, use only corrosion-resist-
ant fittings (stainless steel or brass).
WARNING!
Never use fittings made of steel or iron!
Fit a non-return valve (8) in the tap water inlet, and a pressure
valve (6) in the tap water outlet.
Calorifier WH20A, WH31A, WH45A, WH55A and WH75A