9
DOWN DRAUGHTS
However well designed, constructed and positioned,
the satisfactory performance of the flue can be
adversely affected by down draught caused by
nearby hills, adjacent tall buildings or trees. These
can deflect wind to blow directly down the flue to
create a zone of high pressure over the terminal.
A suitable anti-down draught terminal or cowl will
usually effectively combat direct down blow but no
cowl is likely to prevent down draught due to a high
pressure zone. (see fig. 8) Ensure that any cowl
used will not restrict the flue exit, or cause excessive
back pressure, Refer to B.S. 5440: Part 1.
condition, and dimensions are acceptable. Flues
that have proved to be unsatisfactory, particularly
with regard to down draught, must not be considered
for this appliance until they have been examined and
any faults corrected. If there is any doubt about an
existing chimney a smoke test to B.S. 5440: Part 1
should be carried out.
Before connecting this appliance to a chimney or
flue pipe which has previously been used with
another fuel, the chimney or flue pipe must be
thoroughly swept and lined accordingly.
All register plates, restrictor plates, damper etc.
which could obstruct the flue at a future date must
be removed before connecting this appliance.
Where a chimney is not to be lined a suitable void
must be provided at the base to contain any debris
which might fall from the inside wall, so as to prevent
that debris from obstructing the appliance flue outlet.
(Removal of debris should be facilitated by the
provision of an access door). The void should have
a depth of not less than 250mm (10”) below the
appliance connection.
The combustion products from this appliance will
have a descaling effect on hardened soot deposits
left from burning solid fuels.
ALTHOUGH THE CHIMNEY MAY HAVE BEEN
CLEANED OF LOOSE SOOT PRIOR TO
INSTALLATION, IT IS IMPERATIVE THAT THE
CHIMNEY IS INSPECTED FOR SCALED SOOT
PARTICLES AFTER THE FIRST MONTH OF
O P E R ATION AND ANY LOOSE MAT E R I A L S
REMOVED TO AVOID BLOCKAGE.
FACTORY-MADE INSULATED CHIMNEYS
Factory-made insulated chimneys should be
constructed and tested to meet the relevant
standards and recommendations given in:
* B.S. 7566 – Installation of factory-made chimneys
conforming to B.S. 4543 for domestic appliances.
Part 1: Method of specifying installations design
information.
Part 2: Specification for installation design.
Part 3: Specification for site installation.
Part 4: Recommendation for installation design
and installation.
FLUE LINERS
Chimney’s lined with salt glazed earthenware pipes
are acceptable if the pipes comply with BS 1181 and
must be 150mm (6”). When lining an existing
chimney, a liner approved to BS 715 & B.S. 4543
Parts 1, 2 & 3 should be used.
The liner should be secured at the top and bottom
using a closure/clamping plate, firmly sealed and
Fig.8
USE OF EXISTING CHIMNEYS AND FLUES
When connecting to an existing chimney it is
necessary to line the flue using either 150mm (6”)
rigid or flexible stainless steel liner. An existing flue
pipe or chimney that has proved to be satisfactory
when used for solid fuel can normally be used for
this appliance provided that its construction,
Содержание DONARD 60K
Страница 24: ...23...
Страница 25: ...24...
Страница 27: ...26 Waterford Stanley Bilberry Waterford Ireland Telephone 051 302300 Facsimile 051 302375 Rev 003 DP 020820...