Rayburn 200S, User Instructions, Page: 13 / 17

The position of available types of flue layouts are shown in
Figs. 2, 3 and 4, the cooker flue chamber is adaptable to
providing either top or back flue outlets, by means of the
reversible loose socket.
a) Rear Flue Outlet
This must only be used where there is a brick flue
immediately behind the cooker. Provision must be
made for a condensate collecting vessel and
cleaning door. See Fig. 3.
EXTENDED HORIZONTAL FLUE PIPE CONNECTION IS
ALLOWED UP TO A MAXIMUM OF 150mm IN LENGTH.
NO BEND CONNECTIONS ARE ALLOWED.
b) Top Flue Outlet
The cooker should be connected to the main flue via
a 125mm minimum diameter cast iron flue pipe or
appropriately internally/externally vitreous enamelled
mild steel pipe and be sealed to the cooker flue
chamber with soft rope and fire cement. Any bends
in the flue pipe must not be less than 135º (45º from
vertical) and be complete with a cleaning door.
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 a
soot door provided for chimney sweeping.
If a flue liner or insulated chimney is used, the size should
not be less than 150mm.
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 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 126cm
2 communicating directly to outside
air or an adjacent room which has a permanent air vent of
at least the flue size direct to outside air.
Effect of Extractor Fan
Avoid if possible the installation of an extractor fan in the
same room as the appliance or the room where the
permanent air vent is located.
Compensating extra air inlets must be introduced
equivalent to the capacity of the fan wheel when fitted.
Tall chimneys may develop excessively high updraughts
which prevent the appliance operating correctly.
It is recommended that a proprietary brand adjustable flue
draught stabiliser having an openable cross sectional area
of 126cm
2
be fitted above the flue pipe connection, either
in the brickwork or into a right angle ‘T’ fitting in the flue
pipe position that will not inconvenience appliance
operation or maintenance.
COOKER FLUE CONNECTION
AIR SUPPLY
HIGH UPDRAUGHTS
FLUE LAYOUTS
4