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Westfire WF26 Manual

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WESTFIRE · WF26 WF27 WF28
8
STOVE PERFORMANCE & TESTING
Westfire UNIQ 26, 27 & 28 have been approved in accordance with EN 13240.
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 125 mm
IMPORTANT: Once the stove is unpacked and checked it is necessary to remove the central bar from the flue collar
of the stove before installation. To remove unbolt collar remove bar and replace collar.
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 26, 27, 28 stove has been tested with a draft of 12 Pa. Maximum draft 25 Pa.
Flue gas flow 4.4 g/sec.
Flue gas temperature 263°C. approximately 12 Pa.
NOTE: The outlet from the chimney should be above the roof of the building in accordance with the provisions of
Building Regulations Approved Document J. If installation is into an existing chimney, then it must be sound and
have no cracks or other faults which might allow fumes into the house. Older properties, especially, may have
chimney faults or the cross section may be too large. Westfire Aps recommend the use of a solid fuel flue lining
system for all installation into existing chimneys. All chimney systems must be used in accordance with Building
Regulations Approved Document J.
If there is no existing chimney then either a prefabricated block chimney in accordance with Building Regula-
tions Approved Document J or a twin walled insulated stainless steel flue to BS 1856-1. These chimneys must be
fitted in accordance with the manufacturer’s instructions and Building Regulations. A single wall metal flue pipe is
suitable for connecting the stove to the chimney but is not suitable for using for the complete chimney. The con-
necting flue pipe must have a minimum diameter of 125 mm and its dimension should be not less than the size
of the outlet socket of the stove. Registered smoke exempt models burning wood only can be installed on flue of
125mm throughout. Any bend in the chimney or connecting flue pipe should not exceed 45°. 90-degree bends
should not be used other than within 150 mm of stove rear flue outlet.
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 BS5854:1980 may be used as the
basis for deciding whether a particular chimney design will provide sufficient draught.
If it is found that there is excessive draught in the chimney, then either an adjustable flue damper or alternately a
draught stabiliser should be fitted. 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 flue pipe. Adequate provision e.g. easily accessible soot door or doors must be provided for swee-
ping the chimney and connecting flue pipe.
Stove model Weight Nominal heat output
Wood Smokeless fuels
UNIQ 26 105 kg 5.0 KW N/A
UNIQ 27 110 kg 5.0 KW N/A
UNIQ 28 120 kg 5.0 KW N/A
UK
… 8 …


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