Baxi Slim 1.230 FiN User's And Installer's Manual page 11

4.2 Gas connection
The gas installation and commissioning must be performed by a special-
ized technician in compliance with current regulations.
Connect the boiler gas supply pipe to the gas mains by means of a metal
pipe, inserting a stopcock upstream from the boiler.
The dimensions and height of the boiler's gas pipe connection are given
in table I or II.
4.3 Installing the inlet - outlet ducts
SLIM Fi forced fl ow gas boilers can be installed easily and fl exibly thanks
to the accessories supplied, which are described further on.
The boiler is originally fi tted for connection to a vertical or horizontal,
coaxial inlet - outlet duct. Thanks to the splitter accessory it is possible
to use separate ducts too.
Only accessories supplied by the manufacturer must be used for
installation!
type of ducts
coaxial
twin horizontally
twin vertically
4.3.1 coaxial (concentric) inlet - outlet duct
This type of duct can be used to discharge fl ue gases and draw in air for
combustion both outside the building and in LAS-type fl ues.
The 90° coaxial bend enables connecting the boiler to the inlet - outlet
ducts in any direction since rotation is possible through 180°. It can also
be used as an additional bend in combination with the coaxial duct or
45° bend.
The boiler is supplied with a diaphragm for concentric pipes.
(*) The concentric diaphragm should only be inserted when the length
of the outlet duct is less than 1 metre.
When discharging outside, the inlet - outlet duct must protrude from the
wall by at least 18 mm to permit positioning the aluminium rose and
sealing it in order to prevent moisture getting inside.
max
outlet duct length
without terminal
5 m
10 m
6 m
reduction reduction
in length
to insert
90° bend
1 m
0,5 m
0,5 m
Joint
Diaphragm (concentric) (*)
Concentric union
11
fl ue
in length terminal
to insert diameter
45° bend
0,5 m 100 mm
0,25 m
0,25 m 133 mm
external
duct
diameter
100 mm
- 80 mm
80 mm
Flexible sleeve
oce.9405030833