50
60T - 280T
COSMOGAS
14.1 - Burned gas exhaust and
combustion agent air intake pipe
WARNING! This boiler must be connected to a
flue gas outlet system capable of taking the flue gases
to the open air, outside the building.
WARNING! To connect the burned gas exhaust
and combustion agent air intake, the relevant national
and local regulations must be respected.
WARNING! The flue gases emitted by this boiler
can reach 90°C in some circumstances. Therefore
plastic flue gas outlet ducts capable of resisting this
temperature must be used.
WARNING! This appliance is a “condensing”
boiler. Use AISI 316L stainless steel materials or
polypropylene plastic materials to make the flue gas
exhaust so as to prevent corrosion due to the acidity of
the condensate.
Please remember that appliances of this type must have
exhaust and intake pipes supplied by the manufacturer of
the appliance itself. Other types of pipes, if used, must be
type-approved for this intended use. The types of outlet for
which the appliance is approved are given in the technical
features table at the end of the manual under the heading
Figure 14-1 – Exhaust/intake systems
14 - INSTALLATION - Flue gas outlet and air intake pipe
“type” and on the data plate on the boiler, also under the
heading “type”.
The symbols used to define the type of exhaust are given
below:
- B23 and B23P, intake in room and flue gas outlet through
wall or roof.
WARNING! The boiler is to be installed with
outlet type B23 or B23P and will therefore take in air
for combustion from the room in which it is located.
Therefore, all precautions must be taken regarding
ventilation of the rooms as prescribed by the national
and/or local regulations.
During operation, especially in winter, because of the high
efficiency, it is possible that white smoke could emerge from
the boiler’s flue gas outlet. This is a natural phenomenon
and is not a cause for concern. It is the water vapour in the
flue gas which condenses when it comes into contact with
the outside air.
14.1.1 - Type of intake/exhaust B23 and
B23P
In the case of B23 and B23P type combustion agent air intake/
flue gas exhaust systems, it is essential that the rooms in
which the appliances are installed have at least as much air
as is required for combustion and ventilation of the room. It is
therefore opportune to remember that the combustion of 1m
3
of gas requires 11m
3
of air.
The natural flow of air must occur directly through permanent
openings made in the walls of the room to be ventilated,
which connect to the outside and are far away from sources
of pollution such as: vent pipes of dubious origin, industrial
air outlets, etc. (see section 5.1.1).
The ventilation openings must meet the following requirements:
have clear passage sections of at least 0.3 m
2
;
be made in such a way that the opening ports both
inside and outside the wall cannot be obstructed;
be protected, for example with grills, metallic mesh, etc.
The net passage cross-section must not be reduced by
these systems;
be situated approximately at floor level and so as not to
cause any problems with the operation of the combustion
product exhaust devices; where this position is not
possible, increase the section of the ventilation openings
by at least 50%.
B23
B23
