Westfire WF23 Notice D'installation Et D'utilisation page 5

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PreParatOrY WOrk and safetY CHeCks
iMPOrtant Warning
This stove must not be installed into a chimney that serves any other heating appliance.
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.
CHiMneY
Chimney Connection: flue diameter 150mm (160cm²)
The connection to which the stove must have a diameter of at least 15cm, which corresponds to an area of no
more than 175cm². In order for the stove to perform satisfactorily the chimney height must be sufficient to ensure
an adequate draught so as to clear the products of combustion and prevent smoke problems into the room.
Minimum draft: WESTFIRE UNIQ 23 stove has been tested with a draft of 12 Pa. Maximum draft 25 Pa.
Flue gas flow 5.2 g/sec.
Flue gas temperature 281°C. approximately 15 Pa
NOTE: A chimney height of not less than 4.5 metres measured vertically from the outlet of the stove to the top of
the chimney should be satisfactory. Alternatively the calculation procedure given in BS 5854:2380 may be used as
the basis for deciding whether a particular chimney design will provide sufficient draught.
The outlet from the chimney should be above the roof of the building in accordance with the provisions of Build-
ing Regulations Approved Document J.
If installation is into an existing chimney then it must be sound with no faults which might allow flue gasses to
escape into the house. Older properties, especially, may have chimney faults and must tested by a qualified flue
engineer, often the chimney is too large i.e. more than 175cm². Remedial action should be taken, if required,
seeking expert advice. If it is found necessary to line the chimney then a flue liner suitable for solid fuel must be
used in accordance with Building Regulations Approved Document J.
Any existing chimney must be clear of obstruction and have been swept clean immediately before installation
of the stove by a professional chimney engineer. If the stove is fitted in place of an open fire then the chimney
should be swept one month after installation to clear any soot falls which may have occurred due to the differ-
ence in combustion between the stove and the open fire.
If there is no existing chimney then either a prefabricated block chimney in accordance with Building Regulations
Approved Document J 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.
A single wall metal fluepipe is suitable for connecting the stove to the chimney but is not suitable for using for
the complete chimney. The chimney and connecting fluepipe must have a minimum diameter of 150 mm and its
dimension should be not less than the size of the outlet socket of the stove. Any bend in the chimney or connect-
ing fluepipe should not exceed 45°. 90° bends should not be used.
If it is found that there is excessive draught in the chimney then either an adjustable flue damper or alternatively
a draught stabiliser should be fitted, (flue stabiliser should be set to 12pa). The adjustable flue damper should not
close off the flue entirely but should in its closed position leave a minimum continuous opening free area of at
least 20 % of the total cross sectional area of the flue or fluepipe.
Adequate provision e.g. easily accessible soot door or doors must be provided for sweeping the chimney and
connecting flue pipe
WESTFIRE · WF23
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WESTFIRE · WF23
distance to Combustible materials
Combustible materials should not be located where the heat dissipating through the walls of fireplaces or flues
could ignite it. Therefore when installing the stove in the presence of combustible materials due account must be
taken of the guidance on the separation of combustible material given in Building Regulations Approved Docu-
ment J and also in these stove instructions.
Westfire Wf uniQ 23 standard and sideglass
distance to combustible materials rear std. /sg.
distance to combustible materials side std.
distance to combustible materials side sg.
The minimum distances to flammable materials are specified on the EN 13240 plate on the back of the stove.
Hearth
The hearth should be able to accommodate the weight of the stove and its chimney if the chimney is not inde-
pendently supported.
The WESTFIRE WF UNIQ 23 wood stove has been tested and is suitable to be installed on a 12mm non combus-
tible plate such as Westfire 12mm glass plates or 20mm slate plates. Installation of all hearths should comply in
size and construction so that it is in accordance with the provisions of the current Building Regulations Approved
Document J. The clearance distances to combustible material beneath, surrounding or upon the hearth and walls
adjacent to the hearth should comply with the guidance on the separation of combustible material given in Build-
ing Regulations Approved Document J and also in these stove instructions.
If the stove is to be installed on a wooden floor, it must be covered with a non-combustible material at least
12mm thick, in accordance with Building Regulations Approved Document J, to a distance of 30 cm in front of the
stove and 15 cm to each side measuring from the door of the combustion chamber.
Combustion air supply
In order for the stove to perform efficiently and safely there should be an adequate air supply into the room in
which the stove is installed to provide combustion air. This is particularly necessary if the room is double-glazed
or a flue draught stabiliser is operating in the same room as the appliance. The provision of air supply to the
stove must be in accordance with current Building Regulations Approved Document J. An opening window is not
appropriate for this purpose. Air inlets must be positioned in such a way that they cannot be blocked. An air inlet
may be a vent (the vent must be open and the capacity of the vent sufficient when the stove is lit) or a fresh air
system linked to the stove.
The WESTFIRE WF UNIQ 23 can be fitted as an option with a closed air supply collar; this enables the stove to take
combustion air (primary, secondary and tertiary) directly from outside via 100mm pipe from the stove.
There are no European rules regarding the minimum distance to non-flammable walls, Westfire recommend leav-
ing a gap of at least 10 cm behind and to sides of stove.
fLue and air intake POsitiOns
Westfire Wf uniQ 23 UNIQ 23 50mm LEGS
distance from rear to centre of top flue exit 135mm
distance from floor to centre of rear flue exit 495mm
distance from floor to centre of external 120mm
air intake
fLue and air intake POsitiOns
Westfire Wf uniQ 23
distance from rear to centre of top flue exit
distance from floor to centre of rear flue exit
distance from floor to centre of external air intake
Westfire insulated chambers
distance to combutible materials
200 mm
350 mm
450 mm
UNIQ 23 100MM LEGS UNIQ 23 300MM LEGS
135 mm 135 mm
545 mm 745 mm
170 mm 370 mm
UNIQ 23 PEDESTAL UNIQ 23 PEDESTAL 2
135mm 135 mm
945mm 695 mm
570mm 370 mm
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