Glow-worm Betacom C - Manual (Page 17)

17
6 Installation Preparation
Diagram 6.3
14549 6.3 Wall Template
Take the wall template from the document pack and place in
the desired position on the wall, giving due consideration to
the required boiler clearances, see section 3, and the flue you
are fitting.
Mark the position of the flue centre, if fitting a side flue, extend
the flue centre line into the corner then 170mm along the
adjacent wall, see diagram 6.3.
For extended side flues, the flue hole centre should be
determined by extending the dashed inclined line on the
template to the side wall, then 149mm along the adjacent
wall, see diagram 6.2. This dashed line is drawn at 44mm/
metre (2.5°) rise from the boiler.
To allow for the flue passing through the wall at this angle
a 125mm hole should be drilled irrespective of internal or
external installation.
Remove the wall template whilst drilling the flue hole.
6.4 Flue Hole Cutting
External access flue installation can use a 105mm diameter
core drill.
Internal access only flue installation will need a 125mm
diameter core drill.
NOTE: The flue is designed with an internal fall of 44mm/
metre (2.5°), therefore the hole can be drilled horizontally.
If flue extension pipes are to be used then a core drill size of
125mm is required. This will allow the extension pieces to
slope at 44mm/metre (2.5°) towards the boiler.
6.5 Wall Hanging Bracket Assembly
The Wall Hanging Bracket is supplied in the main boiler
packaging.
Reposition the wall template over the flue hole and mark the
position of the fixing holes for the hanging bracket.
NOTE: Due to the varied site conditions we do not supply
fixings and advise that the installer should supply those which
are suitable.
Drill fixing holes using a 8.5mm. drill bit and insert suitable
wall plugs. Secure the wall hanging bracket to the wall.