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8
FLUE GAS AND AIR SUPPLY SYSTEM
8.1
General
The boiler must be commissioned and installed by a skilled installer in accordance with all applicable standards and
regulations.
The overall resistance of the air supply and flue terminal must
not exceed a pressure drop of 200 Pa
.
For installation values see the table in section 8.8.2.
The S-CB
+
400 & 550 CH boilers have a flue terminal diameter of Ø180 mm and an air supply diameter of Ø180 mm.
Note.
Because the flue gases can have a relatively low temperature, the boiler needs to have a high efficiency approved
stainless steel or plastic flue system. These materials should be usable for the applied pressure in the flue gas
system, be condensate proof and have a temperature class of
T120.
Never use aluminium (containing) flue gas
materials for this boiler.
8.2
Flue gas system
The flue terminal duct must be made of stainless steel, temperature class
T120
.
Note.
Because the flue gases can have a low temperature, the boiler needs to have a high efficiency approved stainless
steel flue system. The material should be usable for positive pressure flue gas systems and have a temperature class
of
T120
or better.
Multiple boilers can be connected to a common duct. These flue gas systems for multiple boiler installations must
always be engineered as zero or negative pressure systems; this to prevent the risk of recirculation of the flue gases.
Consult the flue gas supplier for detailed information and engineering.
