25
type
C12
type
C32
type
C42
type
C52
type
C82
3.2.7.1. Air/flue gas pipe configuration:
B22, C12, C32, C42, C52, C82
B22 This boiler is intended for connection
to an existing flue system either inside or
outside the boiler room. Combustion air is
drawn straight from the boiler room itself
and flue gas is conveyed to the outside.
The boiler must not be fitted with an anti-
wind gust system; it must be equipped
with a fan mounted after the combustion
chamber.
C12 This boiler is intended for connection
to horizontal flue gas and air-intake pipes
connected to the outside by means of
coaxial or split pipes.
The distance between the air intake pipe
and the flue gas pipe must be at least
250 mm and both terminals must be
positioned in a 500mm-side square area.
C32 This boiler is intended for connection
to vertical flue gas and air-intake pipes
connected to the outside by means of
coaxial or split pipes.
The distance between the air intake pipe
and the flue gas pipe must be at least
250 mm and both terminals must be
positioned in a 500mm-side square area.
C42 This boiler is intended for connection
to a common chimney pipe system that
includes two pipes, one for the air intake
and the other for flue gas discharge.
These pipes 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 have different
discharge pressures. Air and flue gas
terminals must not face each other from
opposite walls.
type
B22
C82
This boiler is intended to be
connected to a combustion air-intake
terminal and to a single flue gas
terminal or to a common chimney.
The flue gas chimney system must
comply with current standards.
