In Fig. 2. the cooker is installed in an existing recess. There
must be a clearance of not less than 150mm between the top of
the flue pipe and any overhanging brickwork.
Any cavities or pockets above the register plate should as far
as possible be filled and if necessary the flue pipe should be
extended into the throat of the chimney and soot door provided
for chimney sweeping.
If a flue liner or insulated chimney is used, the size should not
be less than 185mm square or 200mm diameter, and 175mm
diameter respectively.
There are two Isokern pumice liners which are also
recommended. One is the standard 175mm diameter and the
other is a 170mm thin wall. The thin wall has a smaller outer
diameter and is designed to fit an existing chimney system.
Both have a lifetime guarantee.
In Fig. 3, the cooker is connected direct to a brick flue.
Horizontal pipe runs between cooker and brick flue
must not
be used.
In Fig. 4, the cooker is connected to an existing brick flue with a
length of flue pipe. Square bends and horizontal runs
must not
be used. There must be a cleaning door at every bend.
NOTE
: WHATEVER METHOD OF INSTALLATION IS
EMPLOYED, AIR MUST NOT BE ALLOWED TO ENTER THE
CHIMNEY EXCEPT THROUGH THE COOKER. ALL JOINTS
MUST BE AIR-TIGHT.
If the chimney is unlined, and there is any doubt about its
condition, it should be lined in accordance with current Building
Regulations.
PROVISION MUST ALWAYS BE MADE FOR SWEEPING
THE CHIMNEY.
IMPORTANT
: CEMENT TYPE PIPES AND FITTINGS MUST
NOT BE USED WITHIN 2m. OF THE COOKER. CHIMNEYS
OF PLAIN PIPE ARE NOT RECOMMENDED BUT CERTAIN
PROPRIETARY MAKES OF INSULATED CHIMNEY ARE
SUITABLE.
Provision must be made for a permanent unobstructed air vent
having a minimum effective area of 50cm
2
communicated
directly to outside air or an adjacent room which itself has a
permanent air vent of at least this size direct to outside air.
If a flue draught stabiliser is fitted in the flue this appliance
requires a permanent open air vent of 92 cm
2
.
Any air inlet grilles must be positioned so that they are not
liable to blockage.
It is not permissible to use an air extraction device in the same
room as the appliance, unless additional ventilation is provided
to prevent any adverse effect on the flue.
Effect of Extractor Fan
Avoid if possible the installation of an extractor fan in the same
room as the cooker. Compensating air inlets must be
introduced equivalent to the capacity of the fan when fitted.
4
FLUE LAYOUTS
AIR SUPPLY
Fig. 5 Typical Central
Heating/Hot Water System
Fig.6 Typical Wiring Diagram
DESN 510284’A’
DESN 510285 A
