Suitable Materials; Flue Cleaning; Use Of Existing Chimneys And Flues; Draught Requirements - Stanley brandon dhw Installation And Commissioning Manual

Blocked chimneys are dangerous, keep chimneys
and flueways clean, read the operating instructions.
STANLEY CAST IRON PIPES AND BENDS ARE
HIGHLY RECOMMENDED FOR INTERIOR USE.

SUITABLE MATERIALS

* Mineral Fibre cement pipes conforming to
B.S. 7435.
* Sheet metal conforming to B.S.4076.
* Insulated metal chimneys conforming to
B.S.4543 and B.S. 5410 (a galvanised
finish is not suitable).
* Clay flue linings conforming to B.S. 1181.
* Pre-cast concrete chimney blocks,
incorporated into the building structure. It
is particularly important that the correct
connection block be provided at the base of
the flue, B.S. 3572.
* Cast Iron or acid resistant vitreous enamel
lined mild steel to B.S. 41.

FLUE CLEANING

The flue pipe must be fitted with a cleaning plate.
The flue must be inspected annually and cleaned
when necessary.
USE OF EXISTING FLUES AND CHIMNEYS
When connecting to an existing chimney it is neces-
sary to line the flue using approved 125mm (5") rigid
or flexible stainless steel flue liner.
An existing flue pipe or chimney that has proved to
be satisfactory when used for solid fuel can normal-
ly be used for this appliance provided that its con-
struction, condition and dimensions are acceptable.
Flues that have proved to be unsatisfactory, particu-
larly with regard to down draught, must not be con-
sidered 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. 5410 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 thor-
oughly 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
should be provided at the base to contain any debris
which might fall from inside the chimney, 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 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 INSTAL-
LATION, IT IS IMPERATIVE THAT THE CHIMNEY
IS INSPECTED FOR SCALED SOOT PARTICLES
AFTER THE FIRST MONTH OF OPERATION AND
ANY LOOSE MATERIALS REMOVED TO AVOID
BLOCKAGE.

DRAUGHT REQUIREMENTS

While inadequate draught can seriously effect the
efficient operation of the appliance, chimneys over
(5.4m) 18ft. or houses built on high ground can
experience excessive draught, a steady draught of
between 1mm (0.04") and 1.5mm (0.06") W.G. is
required for satisfactory operation.
FLUE LINERS
Chimney's lined with salt glazed earthenware pipes
are acceptable if the pipes comply with BS 1181 and
must be 125mm (5"). When lining an existing chim-
ney, a liner approved to BS 4543, Parts 1, 2 & 3
should be used. The liner should be secured at the
top and bottom by using closure/ clamping plate
firmly sealed and secured and an approved terminal
used at the top.
It is essential that every flue system be inspected
and tested by a competent person for its correct
effectiveness, to ensure that the combustion prod-
ucts are completely discharged to the outside
atmosphere.

FACTORY MADE INSULATED CHIMNEYS

Factory-made insulated chimneys should be con-
structed 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.
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