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No place of the output flue should be blocked and not prevent other
connections. If the output pipe passes 1000 mm nearby of a plastic or painted
groove or 500 mm of painted fringes, an aluminium shield with at least 1000
mm length should be placed below the groove or fringe. Output pipe should
be at least 2 m over surfaces those may be reached by individuals.
Under certain weather conditions, output pipe may emit water vapour;
installation should not be performed at places where this vapour may cause
discomfort.
Figure 31
Exhaust gas discharge through the building chimney and fresh intake from the building chimney with split flue sets
Attention:
The minimum usable diameter must not
be under 80 mm or equivalent for the vertical duct
supplying the combustion air.
Attention:
a) nominal working combustion product temperature : > 70°C max conditions
b) overheat combustion products temperature : 105° C
c) the minimum length of the specified connecting ducts; 1 mt / maximum length of the specified
connecting ducts; 10 mt
d) For size/shape of the end of the fitting please refer 2.2.14. Installation with Vertical Flue Sets page 13,
Fig.26.
e) Please re adjust TsP Paramater P22 = Flues gas pipe length ( value 1 = 1 meter ) according to actual flue
lenght
f) Its MUST to use NON RETURN valve ON the flue gas system.
g) non-return valve function has to be checked annually by authorised service.
Information for the design of the common duct system for a type C(10) boiler
a) The boiler is designed to become connected to a common duct system that is designed to operate
where the static pressure in the common flue duct might exceed the static pressure in the common air
duct by 25 Pa under the condition that n-1 boilers are running at maximum nominal heat input (Qn,max)
and 1 boiler at the minimum heat input allowed by the controls
b) combustion product mass flow rate at maximum nominal heat input are given technical table.
c) combustion product mass flow rate at minimum heat input allowed by the controls are given technical
table.
d) G20 : CO2 or O2 content of the combustion products at nominal operating conditions 9 % ( +0,5/-0,5 )
G30 / G31 : CO2-content; 10.00 % ( tolerance : +%0,5 / -0,5 % )
e) minimum allowable pressure difference between combustion product outlet and air inlet shall be
declared as -200 Pa (including -100 Pa wind pressure).
General for connection of a type C(10) boiler to a common duct system
Characteristics and the applications of the common duct system to which the boiler can be connected,
with at least the following information:
a) the flue duct system shall be CE marked and comply with EN 15502 standart 12.2.1.4.111.2;
b) nominal combustion products temperature for dimensioning the common duct system shall be
declared as 25 °C;
c) the combustion product mass flow rate at maximum heat input shall be specified for every connection
point; the terminal of the common duct shall be designed to induce a draft;
d) condensate flow into the boiler is allowed;
e) maximum allowable recirculation rate of 10 % under wind conditions;
f) the maximum allowable pressure difference between combustion product inlet and air outlet of the
common duct system shall not be exceeded when n-1 boilers are running at maximum nominal heat
input (Qn,max) and 1 boiler at the minimum heat input allowed by the controls;
g) the common flue duct shall be appropriate for an overpressure of at least 200 Pa;
h) the duct system shall not include a draft diverter.
Warning:
the boiler if it is installed as a C (10) boiler and IF / when the boiler is disconnected the air
outlet and the combustion product inlet openings shall be closed and checked on tightness.
C
Exhaust gases should be prevented from entering flue ventilation spaces.
Flue system of combi may be installed from inside the room without requiring
intervention from the external wall. For that reason, a housing should be
installed in the wall for lining the internal surface of channel wherein the
output pipe passes through the wall, particularly for thick walls.
C
10
