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221834B
Diagram 5.5
Diagram 5.4
WALL THICKNESS
115
DIAMETER
125
DIAMETER
135
DIAMETER
2˚
See template for centre line positions
75
300
680
REAR FLUE
0249M
0248M
"x"
2˚
SIDE FLUE
'H'=
0.035x
124mm
56.5mm MIN
115 Minimum hole
125 up to 300mm wall
135 up to 680mm wall
5 Preparation
5.3 Flue Hole Cutting
Having marked out the flue centre cut a hole for the flue see
diagram 5.5 for minimum core drill size for various wall
thicknesses.
This will allow for the 35mm per metre (2
o
) fall towards the boiler.
Note: If required, an optional Wall Liner Kit, part No.900862, is
available, complete with fixing instructions.
5.4 Wall Mounting Bracket
Reposition the template, making sure of dimensional alignment
with the flue centre lines
Mark the boiler securing screws and mounting plate position,
see diagram 5.6.
Drill holes and plug, fit the securing screws allowing sufficient
clearance to accept the keyhole fixing brackets and secure the
boiler mounting bracket to the wall.