© Baxi Heating UK Ltd 2009
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
Waste
Wall Thickness - 40mm
Wall Thickness - 40mm
Waste
Cardboard
Support
Cut Line
Flue Terminal Assembly
Air Duct
Cardboard
Support