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pipe, except the elbow leaving the splitter is insulated to reduce
heat loss from the pipe, thus preventing the formation of flue
gas condensate.
When installing the insulated pipes, a section clamp
with pin must be installed every 2 metres.
1.15 FLUE EXHAUST TO FLUE/CHIMNEY.
Flue gas exhaust does not necessarily have to be connected to a
branched type traditional flue. The flue exhaust can be connected
to a special LAS type multiple flue. Multiple and combined flues
must be specially designed according to the calculation method
and requirements of the standards, by professionally qualified
Gas type
Flue temperature at maximum output
Flue gas mass at maximum power
Flue temperature at minimum output
Flue gas mass at minimum power
CO
at Q. max.
2
CO
a Q. minimum
2
Maximum head available at the flue at maximum power
(maximum resistance value of the commercial flue system)
Maximum head available at the flue at minimum power
Maximum temperature achievable in the exhaust ducts
- Ducts must withstand condensation (only for con-
densing models);
- Air intake ducts must withstand working air tem-
peratures of up to 60°C;
- The maximum permissible percentage of flue gas
recirculation in windy conditions is 10%.
- Suction and exhaust pipes cannot be installed on opposing
walls;
- With flues in configuration C
flues is not permitted.
discharge into pressurised
6
technical staff. Chimney or flue sections for connection of the
exhaust pipe must comply with requisites of technical standards
in force.
1.16 DUCTING OF EXISTING FLUES.
With a specific "ducting system" it is possible to reuse existing
flues, chimneys and technical openings to discharge the boiler flue
gases. Ducting requires the use of ducts declared to be suitable for
the purpose by the manufacturer. Follow the installation and user
instructions provided by the manufacturer and the requirements
of standards.
1.17 CONFIGURATION FOR C6 FLUE INSTALLATION.
Appliance designed to be connected to a commercial exhaust/
intake system.
°C
kg/h
°C
kg/h
%
%
Pa
Pa
°C
G20
G31
128
128
62
64
106
104
66
64
6,9
7,6
2,6
3,1
117
117
180
30
25
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