18
18
type
C12
type
C32
type
C42
type
C52
type
C82
3.2.7 Air/flue system ducts configuration:
B22, C12, C32, C42, C52, C82.
B22
This boiler is intended for connection to an
existing flue system either internal or external to
the boiler room. Combustion air is taken directly
from the boiler room itself while flue gas is con-
veyed to the outside.
The boiler
must not
be fitted with an anti-wind
gust device, it has to be equipped with a fan
mounted after the combustion chamber.
C12
This boiler is intended for connection to
horizontal outlet and intake ducts connected to
the outside by means of coaxial or split ducts.
The distance between the air intake duct and
the flue gas outlet duct is to be a minimum of
250 mm and both terminals must be positioned
within a squared area having 500 mm sides.
C32
This boiler is intended for connection to
vertical outlet and intake ducts connected to
the outside by means of coaxial or split ducts.
The distance between air intake duct and flue
gas flue duct is to be a minimum of 250 mm
and both terminals must be positioned within a
squared area having 500 mm sides.
C42
This boiler is intended for connection to a
collective chimney pipe system that includes
two ducts, air intake and flue gas exhaustion.
These ducts may be coaxial or split.
The flue gas chimney system must comply
with current standards.
C52
Boiler with separate pipes for air intake
and flue gas.
Air and flue gas may be have different exhaustion
pressure. Air and flue gas terminals may not face
each other from opposite walls.
C82
This boiler is intended to be connected to a
combustion air terminal and to a single flue gas
terminal or to a collective chimney.
The flue gas chimney system must comply with
current standards.
type
B22
