Technical data

5.0 Installation
17
5.5 Rear Flue Preparation
Wall thickness 285mm - 500mm (11
5
/
16
- 19
3
/
8
) go
to section 5.6.
Wall thickness 100mm - 284mm (4 in - 11
3
/
16
in).
If the wall thickness is less than 285mm (11
3
/
16
in),
it will be necessary to cut the components of the
flue to the appropriate size.
1. Measure the wall thickness (Fig. 24). Mark this
dimension on the Flue Duct from the flared end
and cut the waste off the plain end (Fig. 25).
2. Take the Flue Terminal Assembly and
measure from the terminal end the wall thickness
and subtract 40mm (Fig. 26). Cut the waste off
the plain end.
Wall Thickness - 40mm (all boilers)
3. The cardboard support should be installed onto
the flue tubes to ensure the assembly is
supported during cutting (Fig. 28 & 29).
4. Measure the same amount from the flange end
of the Air Duct and cut the waste off the plain end
(Fig. 27).
Wall Thickness - 40mm (all boilers)
5. Go to section 5.6.
Wall Thickness
Fig. 25
Fig. 26
Fig. 27
Fig. 28
Fig. 29
Fig. 24
Waste Wall Thickness
Flue Duct
WasteWall Thickness - 40mm
Wall Thickness - 40mmWaste
Cardboard
Support
Cut Line
Flue Terminal Assembly
Air Duct
Cardboard
Support