17
British Gas 100 & 125 RD2 -
Installation & Servicing
INSTALLATION
FLUE OUTLET
17 CUTTING THE FLUE
-
wall thicknesses of 114 to 600mm
1.
Measure and note the wall thickness X.
2.
Mark the wall thickness onto the flue.
3.
To ensure the tube is cut square, mark the flue all
the way round.
4.
Cut to length X, using the cardboard ring for
support.
5.
Remove cardboard ring and remove any burrs.
16 PREPARING THE WALL
1.
Tape the template into the selected position.
2.
Mark onto the wall the position of the flue
duct hole.
IMPORTANT.
Ensure that, during the cutting
operation, masonry falling outside of the building
does not cause damage or personal injury.
3.
Cut the flue hole, preferably with a 125mm
(5") core boring tool, ensuring that the hole is
square to the wall. If the hole has been quite
accurately cut with a drill then making good
the wall faces is not essential as seals are
provided at both ends of the flue. However,
both wall faces immediately around the cut
hole should be flat; make good if necessary.
For less accurate holes make good to
approximately 125mm (5") diameter at the 2
wall faces.
4.
Remove the template from the wall.
Note.
If the terminal is to be
sited within 25-40mm
of a corner or vertical
pipe (refer to Table 3)
then the hole MUST
be accurately cut and
the rubber weather
seal trimmed around
the groove provided.
The terminal wall plate
need not be fitted.
18 FITTING THE BOILER SEALING RING TO THE FLUE - Rear and Side
1.
Fit the boiler sealing ring inside the outer flue duct. Ensure
the boiler sealing ring is fully engaged.
Ensure the notch aligns with the groove on the outer flue
duct. This ensures correct alignment of the flue terminal.
2.
Drill 3 holes 3.2mm (
1/8
") dia. through the outer flue duct
and boiler sealing ring.
Do NOT drill the inner flue
duct
.
3.
Insert the self-tapping screws, provided, in order to fix the
boiler sealing ring in position.
4.
If the boiler is located with the rear against the wall, stick
the self adhesive foam strip, provided, onto the flue
immediately behind the boiler sealing ring. Otherwise refer
to Frame 20.
