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INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH
8-716-106-252a (03.05)
15
CONVENTIONAL FLUE
CONVENTIONAL FLUE
Open (conventional) flued appliances must not
be installed in a bedroom, bathroom or bedsitting
room.
The flue system must be in accordance with
BS5410 : Part 1 and the current Building
Regulations.
The flue must be constructed of materials suitable
for the use of condensing combustion products.
External flue systems must be of the insulated
type.
Brick and masonry chimneys must be lined with
a suitable non-combustible material and properly
jointed to withstand the effects of the working
temperature (minimum rating of material 120°C)
of the appliance and any condensate which may
form.
All flue joints must be sealed to prevent the
leakage of condensate and combustion products.
Ensure that joints are made so that the
condensate runs away and is not collected within
the joint.
NOTE: The flue can be increased in size from the
boiler take off point providing the joint is correctly
sealed. Never reduce the flue diameter from the
boiler take off point.
The flue should be vertical and contain as few
bends as possible, a maximum of two 135°
bends should be used.
The flue outlet must be extended beyond the
eaves of the building and where possible, above
the apex.
Fit a suitable anti down-draught terminal where
down draughts are experienced.
Manufacturers of conventional flue systems suitable
for this appliance are listed under 'Contact
Information' on the inside front cover.
C
B
A
D
E
A - Boiler
B - Flue
C - Max. 2 bends at 135°
D - Anti down-draught terminal
E - Chimney
