Bristol Clifton 8 Benutzerhandbuch - Seite 5

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3: IMPORTANT INFORMATION ABOUT INSTALLATION AND USING THE STOVE
Before installation and/or use of this appliance please read these instructions carefully to ensure that all requirements
are fully understood.
This appliance must be installed by a registered engineer, or approved by building control, failure to do so may
endanger life and property. All local regulations including those referring to national & European standards need to be
complied to when installing the appliance. The appliance is not suitable for installation in a shared flue system.
All the below instructions should work in conjunction with building regulations document J, if there is a variation the
most stringent requirement should be adhered to.
Chimney/flue
The chimney height and the position of the chimney terminal should conform to Building Regulations. Minimum
chimney height is 4.5m and the recommended minimum diameter is 150mm wherever possible for safety margin and
performance. Check that the chimney is in good condition, dry and free from cracks and obstructions. The diameter of
the flue should not be less than 125mm (spigot diameter) at any point and not greater than 200mm. If any of these
requirements are not met, the chimney should be lined by a suitable method. The chimney must be swept before
connection to the stove. When using a liner, a 5" (125mm) flexible flue liner is permitted to be used on these appliances
providing that the users only burns smokeless fuel, seasoned or kiln dried wood logs with the air limiter fitted in in full
accordance with the wood burning instructions. A 6" 150mm liner is always better where it is possible to use one.
Where the chimney is believed to have previously served an open fire installation, it is possible that the higher flue gas
temperature from the stove may loosen deposits that were previously firmly adhered, with the consequent risk of flue
blockage. It is therefore recommended that the chimney be swept a second time within a month of regular use after
installation.
If you have any doubts about the suitability of your chimney, consult your local dealer or chimney specialist. If there is
no existing chimney then either a solid fuel compatible prefabricated block chimney or a twin-walled insulated stainless
steel flue to BS 4543 can be used. These chimneys must be fitted in accordance with the manufacturer's instructions
and Building Regulations.
Flue Draught : (Working range 12-25 Pascals)
The flue draught should be checked under fire at high output and, if it exceeds the recommended maximum, a draught
stabiliser must be fitted so that the rate of burning can be controlled to prevent over-firing.
Hearths:
These stoves require a 125mm thick non-combustible constructional hearth beneath them to protect the building; this
can include any solid non-combustible floor. A non-combustible superimposed hearth forming an apron of at least
300mm at the front of the stove and 150mm on either side must also be provided. The superimposed hearth must not
be less than 12mm thick and must have a clearly defined edge (change of level) to discourage placing of any
combustible materials on or partially over it. Ensure the hearth is flat & level and the back panel and surround are at
right angles to the hearth.
The appliance shall be installed on a floor with adequate load-bearing capacity. If the existing construction does not
meet this requirement, suitable measures (e.g. load distributing plate) should be provided to achieve it.
(Please see Building regs. Document J for further information)
Ventilation :
Adequate ventilation is ESSENTIAL for the safe and efficient operation of any solid fuel or wood burning appliance.
Ventilation MUST be provided where required by the stove output or flue under-performance. Keep all ventilation clear
and free of blockage, including any direct outside air connection where used.
Document J of the Building Regulations states that (except in recently built properties) purpose provided ventilation is
not required in England and Wales unless the appliance nominal rated output is greater than 5kW. Over 5kW 5.5 cm2 of
ventilation (550mm2) is required for every kW output above 5. For example 6.5 kW requires 8.25 cm2 and 8 kW needs
16.5cm2. In any case, if difficulty in starting the fire or any excessive fuming is experienced, ventilation must be put in
place as required to eliminate these flue problems. If a flue draught stabiliser is fitted then extra ventilation is required.
See Document J of the Building Regulations for detailed guidance especially in new build properties where purpose
provided ventilation may be required.
Extractor Fan Warning
There must not be an extractor fan fitted in the same room as the stove as this can cause the stove to emit fumes into
the room. If unavoidable the appliance must be checked with Approved Document A.D. 1.21 and necessary action
taken. HETAS can provide guidance of a pressure test procedure to check safe operation of the stove and flue.