Minimum dimensions of the duct
Outer Ø cou
pling
Min. duct inner dimension
System
D
[mm]
short side A
[mm]
round B
[mm]
SAS 160 (DN 160)
184
225
245
SAS 200 (DN 200)
227
256
276
Back ventilation
For room air-depending operation of the gas condensing boiler with the
SAS 160 and SAS 200 the duct below the flue gas connection in the
installation room must be provided with back ventilation. The clear cross-
section must be at least A
min
= 125 cm
2
. A respective air intake grid is
available as accessory.
Assembly
1. The pipes and formed pieces have to be fitted together up to the
connector basis. Only the original profile seals of the building kit or the
original spare seals may be used between the individual elements.
Before assembly, the seals must be treated with the silicone paste
which is part of the scope of delivery. When routing the pipes care
must be taken that the pipes are installed in line and without tension.
In this way leaking of the seals is prevented.
2. For fastening the support rail in the opposite wall of the duct opening,
a bore hole (d=10 mm) must be provided on the level of the opening
edge. Then the pin of the support rail has to be hammered into the
bore hole.
3. The flue pipe is lowered from the top into the duct. For this, connect a
rope to the support leg and insert the pipes, section by section, from
the top. To prevent the components sliding apart during assembly, the
rope must be kept on tension until the final assembly of the flue pipe.
If spacers are necessary, these have to be fitted to the duct at least
every 2 m.
Cant the spacers at a right angle and align centric in the duct. Pipes
and formed parts are to be installed in such a way that the connectors
are arranged counter to the flow direction of the condensed water.
After the pipes have been inserted, place the support leg in the
support rail and align (flush and without tension). The duct cover at
the chimney head must be assembled in such a way that no rainfall
can get into the space between flue pipe and duct and the air for back
ventilation can flow freely.
Caution
When replacing seals use new seals!
When the flue pipes are dis-assembled, new seals must be used
for the reassembly!
Fig.15
Minimum dimensions of the duct
RA-0000159
Fig.16
Assembly of the support rail
RA-0000157
2
Fig.17
Insertion into the duct
RA-0000158
3
6 Installation
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