Figure 29
Building chimney connection with hermetic split flue
Figure 30
Use with split flue set
C
Exhaust gas discharge through the building chimney and fresh intake from outside
with split flue sets
For room sealed appliances of the type C6 boilers
overheat combustion products temperature for flue; < 105 °C CO
2
content at nominal
operating conditions; 9.00 % (tol%0,5 / -0,5 % ) maximum allowable draught
and maximum allowable pressure difference between combustion air inlet and flue gas
outlet (including wind pressures); 120 Pa. characteristics and the applications of the
duct system to which the boiler can be connected; condensate flow into the appliance
is not allowed. Maximum allowable temperature of combustion air; 40 C° maximum
allowable recirculation rate of 10 % under wind conditions.
Attention:
The terminals for the supply of combustion air and for the evacuation of
combustion products shall not be installed on opposite walls of the building.
Exhaust gas discharge through the building chimney and
fresh intake from outside with split flue sets
B
23
B
B
23P
33
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.
Attention:
The minimum usable diameter must not be under 80 mm or equivalent for
the vertical duct supplying the combustion air.
C
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 : CO
2
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
10
Figure 31
Exhaust gas discharge through the building chimney and fresh intake from the
building chimney with split flue sets
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.
19
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