3 flue location and ventilation – Glow-worm 18-30sxi Range User Manual
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0020008155A
3 Flue Location and Ventilation
3.1 Flue Options
This boiler is suitable for concentric Horizontal and Vertical
flues, elevated horizontal and vertical twin, all are fitted onto the
top of the boiler.
The Glow-worm Flue Options Guide, available on request or
through the web site, describes in detail the necessary
accessories.
These instructions describe the use of the standard and
telescopic horizontal flues.
The instructions for all other flues will be contained in those
packs.
Diagram 3.1
Diagram 3.3
3.2 Flue Length
The maximum permissable horizontal flue length is 10 metres
plus the flue terminal, this can be achieved by use of the
accessories, however should additional 90
o
or 2 x 45
o
elbows
be used then the length MUST be reduced by 1metre.
When extension pipes are used the flue system must be
designed to have a continuous fall to the boiler of at least 2.5
o
44mm/metre to allow condensate to run back into the boiler and
out via the drain.
The flue can be installed from inside the building, when access
to the outside wall face is not practicable.
The diagrams 3.1 to 3.4 describe the lengths achievable without
the use of extensions or elbows.
Diagram 3.2
Diagram 3.4
TOP REAR FLUE - TELESCOPIC
WALL THICKNESS
BOILER
MOUNTING WALL
OUTSIDE
WALL FACE
208 min. to 413 max.
87min
112
176
NOTE. If necessary, it is permitted to increase
this dimension to 600mm max.
12837
TOP REAR FLUE - STANDARD
12839
WALL THICKNESS
BOILER
MOUNTING WALL
OUTSIDE
WALL FACE
75 min. to 540 max.
87min
112
176
NOTE. If necessary, it is permitted to increase
this dimension to 600mm max.
TOP SIDE FLUE - TELESCOPIC
L
FLUE
C
Max flue length 589mm
211
239
20mm
min.
clearance
A
A
Max. distance from outside
wall face to min clearance.
LH - 330mm
RH - 358mm
Min. distance from outside
wall face to min clearance.
LH - 125mm
RH - 153mm
OUTSIDE
WALL FACE
87min
NOTE. If necessary, it is permitted to
increase this dimension to 600mm max.
INTERNAL
SURFACE
12838
12840
TOP SIDE FLUE - STANDARD
L
FLUE
C
Max flue length 717mm
211
239
20mm
min.
clearance
A
A
Max. distance from outside
wall face to min clearance.
LH - 458mm
RH - 486mm
Min. distance from outside
wall face to min clearance.
LH/RH - 75mm
OUTSIDE
WALL FACE
87min
NOTE. If necessary, it is permitted to
increase this dimension to 600mm max.
INTERNAL
SURFACE