12
This 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
INSTALLATION, 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, chimney’s over
5.4m (18ft) for houses built on high ground can
experience excessive draught. A steady draught of
between 1mm (.04) and 1.5mm (.06) inches 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 EN 1457
and must be 150mm (6”). When lining an existing
chimney, 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 low
resistance 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
products are completely discharged to the outside
atmosphere.
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.
VENTILATION & COMBUSTION AIR
REQUIREMENTS
1.
It is imperative that there is sufficient air supply
to the burners of the cooker in order to support
correct combustion.
2.
The air supply to this appliance must comply
with BS 5410 Part 1.
3.
The minimum effective air requirement for this
appliance is 215 cm
2
(100K), 193 cm
2
(80K) or
155cm
2
(60K). When calculating combustion air
requirements for this appliance use the following
equation: 550mm
2
per kW of maximum rated
output above 5kW. These requirements are
illustrated in OFTEC Technical Book No. 3 &
B.S. 5410.
4.
If there is another appliance using air fitted in the
same or adjacent room, it will be necessary to
refer to B.S. 5410 to calculate the additional air
supply.
5.
All materials used in the manufacture of air
vents should be such that the vent is
dimensionally stable and corrosion resistant.
6.
The effective free area of any vent should be
ascertained before installation. The effect of
any screen or grill should be allowed for when
determining the effective free area of any vent.
7.
Air vents direct to the outside of the building
should be located so that any air current
produced will not pass through normally
occupied areas of the room.
An air vent outside the building should not be
located less than the dimensions specified
within the Building Regulations (See Technical
Data) from any part of any flue terminal. These
air vents must also be satisfactorily fire proofed
as per Building Regulations.
8.
Air vents in internal walls should not
communicate with bedrooms, bedsits, toilets,
bathrooms or rooms containing a shower.
9.
Air vents traversing cavity walls should include a
continuous duct across the cavity. The duct
should be installed in such a manner as not to
impair the weather resistance of the cavity.
10. Joints between air vents and outside walls
should be sealed to prevent the ingress of
moisture. Existing air vents should be of the
correct size and unobstructed for the appliance
in use.
11. If there is an air extraction fan fitted in the room
or adjacent rooms where this appliance is fitted,
additional air vents will be required to aleviate
the possibility of spillage of combustion products
from the appliance/flue while the fan is in
operation. (Refer B.S. 5410).
Содержание BRANDON 100K
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