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Regulations and directives
6720813171 (2016/05) 9
Hand over
Please complete the appropriate sections on completion of the
installation and commissioning in the relevant log book an hand it over to
the end user.
3 Regulations and directives
3.1 Designated use
The boiler may only be used to heat up water for heating systems and/or
domestic hot water (DHW) systems.
The boiler can be installed either as a single system or as part of a
multiple system (cascade system). A cascade system enables several
boilers of this type to be connected together, where a maximum of
8 boilers with a total capacity of 800 kW can be connected together on a
floor surface of approximately. 2 m².
Special cascade units (accessories) have been developed to enable this
boiler to be installed in a cascade system. Every cascade unit includes an
installation frame, horizontal headers, connection pipes for the boiler,
main gas pipe and vertical low loss header.
Cascade units are available for installing the boilers in line or back-to-
back. These cascade units make installing a cascade system easier and
less labour intensive. Please contact your dealer or the manufacturer for
further information about cascade systems.
The construction and operating behaviour of the boiler are in
accordance with the requirements listed:
3.2 Boiler room
Observe all statutory building regulations applying to the place of
installation.
The boiler can only be mounted to the wall or installed in a cascade
system. When installed in a room with thin walls or a thin floor,
resonating noise may occur. Install noise reducing parts if required.
3.3 Combustion air flue gas connection
If the boiler is operated dependent on room air, the installation room
must have the required air vents. Do not obstruct these vents. The air
vents must always be free.
3.4 Quality of the heating system water
Thoroughly clean and flush the system before filling it. Use only
unsoftened mains tap water when filling or topping up the system. The
use of dirty water will lead to build-ups of sludge and corrosion, which
can in turn result in malfunctioning of the boiler and damage to the heat
exchanger.
Inhibit the system with the correct dosage of an approved product.
Do not treat the water with antifreeze or water softeners.
The pH of the heating system water must be between 7 and 8.5. If this is
not the case, please contact Worcester Customer Service before
proceeding.
3.5 Quality of the pipework
When using plastic pipework in the heating system, e. g. for floor
heating, it has to be oxygen-tight according to relevant UK-Standards. If
the plastic pipes do not comply with these standards, the system parts
must be isolated using heat exchangers.
3.6 Maintenance schedule
The activities to be included in an annual inspection and maintenance
contract can be found in the service section of this manual ( pages 48
and 52).
If inspection reveals a situation which makes maintenance activities
necessary, these activities have to be carried out ( chapter 13
“Maintenance”, page 48).
3.7 Applicability of regulations
Changes or amendments to the regulations also apply at the time of
installation and have to be complied with.
The appliance complies with the basic requirements of
the relevant European directives.
Conformity has been substantiated by the proper
documents which - together with the declaration of
conformity - are filed with the manufacturer.
CAUTION:
Damage to the installation due to frost.
Install the heating system in a room which is free from
frost.
WARNING:
Fire hazard due to flammable materials or liquids.
Do not store any flammable materials or liquids in the
direct vicinity of the boiler.
CAUTION:
Boiler damage due to contaminated combustion air or
contaminated air in the boiler room.
Never use the boiler in an environment which
contains lots of dust or aggressive chemicals. Such
as spray shops, hairdresser's shops, agricultural
enterprises (manure) or locations where
trichloroethylene or hydrogen halides (e.g.
contained in aerosols, certain adhesives, solvents or
detergents, paints) and other aggressive chemicals
are used or stored.
In such situations you must opt for a room sealed
installation.
CAUTION:
Boiler damage due to corrosion.
If the boiler is used in systems with gravitation
circulation or in open systems, the boiler circuit must
be isolated from the rest of the system by means of a
(plate-type) heat exchanger.
NOTICE:
Damage to the installation due to insufficient or
improper cleaning and maintenance.
Inspect and clean the heating system as required
once a year.
Carry out maintenance as required. Immediately
remedy faults. This will avoid further damage to the
system.
9


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