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Checking Existing Chimney
The internal and external location of the chimney should
be checked
before
the appliance is installed and
rectification made where necessary to prevent leakage or
porosity. The soundness of the chimney which should
have a minimum flue dimension of 150mm can be
confirmed by smoke testing.
Advice on the test method can be obtained from HETAS
Ltd.
When repairing or re-using existing chimneys it is
recommended that the building control officer be consulted
before the commencement of work with particular attention
to the chimney height and its termination
The chimney MUST be swept before installation.
Erecting New Chimney
The flue through the chimney should be formed with pre-
cast moisture and acid resistant liners with a minimum
internal diameter of 150mm diameter and all in accordance
with the current Building Regulations (England and Wales)
and in Scotland the Building Standards (Scotland)
(Consolidation) Regulations and the Codes of Practice for
chimneys and flues BS. 6461 Part 1 and BS. 7566 Parts 1
to 4.
Ensure the chimney liners are free of projecting internal
building jointing composition before the appliance is
installed.
Factory-Made Insulated Chimneys
It is recommended the chimney be ceramic lined and
comply with BS. 4543: Part 2.
The minimum diameter for a straight chimney is 150mm
and there should be not more than two bends of 45Þ from
vertical.
IN ALL TYPE OF CHIMNEYS THE MINIMUM HEIGHT
FOR CORRECT OPERATION OF THE CHIMNEY IS 5.5m
AND SHOULD TERMINATE ABOVE THE ROOF IN
ACCORDANCE WITH REGIONAL STATUTORY
REQUIREMENTS RECOMMENDED FLUE DRAUGHT -
2mm W.G. (0.08 in) MINIMUM. THE APPLIANCE
SHOULD BE INSTALLED AND CONFORM TO THE
CURRENT CODES OF PRACTICE FOR INSTALLATION
OF DOMESTIC HEATING AND COOKING APPLIANCES
BURNING SOLID FUEL - BS 8303.
ALWAYS ADVISE THE USER TO CLEAN THE COOKER
FLUES IN ACCORDANCE WITH THE OPERATING
INSTRUCTIONS AND TO HAVE THE CHIMNEY SWEPT
AT A MINIMUM OF 12 MONTHLY INTERVALS AFTER
THE COOKER IS COMMISSIONED.
3
THE CHIMNEY
Fig. 2
Fig. 3
Fig. 4
DESN 510181 C
DESN 510182 C
DESN 510183 C
Содержание 200S
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