Vetus WHT25 Manuel D'installation Et D'utilisation page 8

ENGLISH
1 Safety
Warning indications
Where applicable, the following warning indications are used in this
manual in connection with safety:
Indicates that great potential danger exists that can lead to serious
injury or death.
Indicates that a potential danger that can lead to injury exists.
Indicates that the usage procedures, actions etc. concerned can re-
sult in serious damage to or destruction of the engine. Some CAU-
TION indications also advise that a potential danger exists that can
lead to serious injury or death.
Emphasises important procedures, circumstances etc.
Symbols
Indicates that the relevant procedure must be carried out.
Indicates that a particular action is forbidden.
Share these safety instructions with all users.
General rules and laws concerning safety and accident prevention
must always be observed.
This product should only be installed and maintained by
qualified personnel who have read and understood the
instructions and precautions in this manual . Failure to follow
the instructions in this manual may result in serious injury or
property damage . The manufacturer shall not be liable for any
damages resulting from improper installation or maintenance
by unqualified personnel .
This product should only be operated by persons who have
read and understood the instructions and precautions in this
manual . Failure to follow the instructions in this manual may
result in serious injury or property damage . The manufacturer
shall not be liable for any damages resulting from improper
operation .
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2 Introduction
The tap water in the boiler's tank will be heated by one of the follow-
ing heat sources:
- engine coolant flowing through one of the heating coils, and/or
- CH water from the ship's heating system flowing through the sec-
ond heating coil, and/or
- the built-in electrical heating element.
The calorifier is not suitable for brackish or salt water!
3 Installation
3 .1 General
First consult the piping diagrams and installation drawing, see draw-
ing on pages 26 through 29.
Preferably fit the boiler low in the ship so that highest point of the
boiler is at a lower level than the expansion tank of the ship's en-
gine. This is in connection with removing air from the system, see
drawing 1.
The engine can be connected to the heating coil via connections 'A1'
and 'B1' or connections 'A2' and 'B2' .
The heating coils are identical.
The flow direction of the engine coolant through the coils has no im-
pact on their correct operation.
If the boiler does have to be positioned above the level of the expan-
sion tank for the engine an additional expansion tank must be fitted,
see drawing 2.
Fit a shut-off valve between the expansion tank and the highest
placed pipe between the engine and the boiler. This shut-off valve is
closed during normal operation and only opened when topping up
or bleeding the system.
If the calorifier is installed considerably lower than then the engine's
expansion tank, the coolant water can start to circulate when the en-
gine has stopped. This will lead to very fast cooling of the hot tap
water. To prevent this, install a non-return valve - see drawing 3. A
stop cock can also be used instead of a non-return valve.
The resistance in the pipe can become too high if the pipes between
the engine and the boiler are extremely long. The cooling fluid will
then no longer circulate through the boiler. In that case fit a central
heating circulation pump in the pipe, see drawing 4.
3 .2 Pipes from Engine to Calorifier
(see pages 26 and 27)
The coolant water pipes from the ship's engine to the calorifier
should be as short as possible, so that the increase in engine cool-
ant capacity is kept to a minimum and no extra expansion space is
required. These pipes must be installed so that they are absolutely
self-bleeding.
The pipes should have the same cross-section as the calorifier/heater
connections on the ship's engine, so that no extra resistance is created.
Also consult the engine supplier's instructions.
Use a good quality reinforced hose or copper pipes.
Installation and user manual Water Heater WHTxx
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