Fig.9
FLUE SYSTEM
Generally the most effective chimney is one that is
straight, avoids offsets, and terminates with a
straight sided pot. Horizontal runs more than
305mm (12”) and 90
o
bends numbering more than 2
per installation should be avoided. Where the stan-
dard masonry chimney is not available, a proprietary
type of 125mm (5”) twin wall, fully insulated pipe
may be used.
Flues should be vertical wherever possible and
where a bend is necessary, it should not make an
angle of more than 37.5
o
with the vertical.
Fig.8
Never obstruct free air circulation from around or
entering the cooker grills.
Where the flue passes through a combustible mate-
rial a twin wall solid packed insulated chimney con-
nector must be used and come flush with the outer
surface material and run all the way to the masonry
chimney or to the point of termination of the factory
made chimney. (see Fig. 8).
may be caused by roof structures, other chimney
stacks etc. The venting terminal position should be
in accordance with Building Regulations BS 5410:
Part 1.
FLUE CLEANING
The flue pipe must be fitted with a cleaning pipe.
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 either 5” (125mm) 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 proven to be unsatisfactory, particu-
larly with regard to down draught, must not be con-
sidered for venting this appliance until they have
been examined and any faults corrected. If there is
any doubt about an existing chimney, a smoke test
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/or lined accordingly.
All register plates, restricter plates and dampers etc.
which could obstruct the flue at a future date must
be removed before connecting this appliance.
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 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.
NOTE: Never connect to a chimney or flue
system serving another appliance.
7
FLUE HEIGHT
The flue must be high enough 4.5mts (15ft mini-
mum) measured vertically from the appliance outlet
to the top of the flue terminal to allow flue gases to
vent into the clear air, away from turbulence that
A bend should not
make an angle of
more than 37.5
o
with the vertical.
