30
COSMOGAS
AGUAPLUS
11.1 - Flue exhaust and
combustion air intake duct
WARNING !!! This appliance must be connected
to a flue system that evacuates the products of
combustion to the open air outside of the building.
WARNING !!! The flue system must be
terminated in accordance with the national and local
regulations and standards in force.
WARNING !!! This appliance has flue gas
temperatures that can reach 90°C under certain
conditions. Therefore, use flue exhaust ducts in plastic
that can resist said temperature.
WARNING !!! This appliance is “condensing”.
To realise a flue exhaust, use materials in AISI 316L
stainless steel or polypropylene plastic materials to
prevent corrosion due to condensate acidity.
Figure 11-1 - Exhaust/intake systems
11 - INSTALLATION - Air intake and flue exhaust ducts
It is recommended that exhaust and intake ducts supplied by
the manufacturer of the appliance itself. Other types of ducts,
if used, must be approved for such intended use. The types
of exhaust for which the appliance is approved are shown on
the technical features table at the end of the manual, under
the “type” heading and on the plate affixed to the boiler, again
under the “type” heading.
The symbols used to define the type of exhaust are shown
below:
- B23 and B23P, room intake and wall or ceiling mounted
flue exhaust.
WARNING !!! If you install an appliance with a B23
ou B23P type exhaust, it will extract air for combustion
from the room in which it is located. Therefore, all the
precautions regarding room ventilation required by
national and/or local standards must be taken.
During operation, especially in the winter, it is possible for
white smoke to come out of the appliance flue exhaust due
to high output. This is solely a natural phenomenon and no
cause for worry as it is the water vapour in the flue gases
that condense in contact with the external air.
11.1.1 - B23 and B23P air intake/flue
discharge type
In the event of B23 type combustion air intake/flue exhaust, it
is essential that sufficient allowances for combustion air are
made. The combustion air shall be taken from outside either
through natural or mechanical means.
The location of the air intake should be away from sources of
pollution such as industrial air extraction systems, swimming
pool ventilation systems and cleaning chemicals such as
laundry discharges. Further details on ventilation requirements
and allowances can be found in sections 5.1.1 and 5.1.2.
Key Figure 11-1
A = Plant room;
B = Ventilation openings;