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Information for installations C
The appliance is suitable for operation in a C
The appliances are developed to operate on collective pressurised flues with a safety pressure at the minimum heat input of 25 Pa and a
safety pressure at the maximum heat input of 100 Pa.
In boilers installed in flue systems type C
which will require automatic calibration. This is the only calibration operation permitted as CO
the operating pressures induced in the collective flue, with particular reference to the minimum heat input or any recirculation
phenomena induced by the flue system.
The appliance must be connected to a flue system designed by a heating engineer in compliance with the local regulation in force.
The collective flue system must be suitably sized to allow the appliance to operate with the following specifications with which it was de-
signed:
- the maximum pressure, when n-1 appliance is working at maximum heat input (with n= number of total appliances connected or that
can be connected to the same collective duct), and a boiler works at minimum heat input, is 25 Pa;
- flue gas mass at maximum heat input;
- flue gas mass at minimum heat input;
- the minimum pressure difference allowed between the combustion product outlet and the combustion air inlet is -200 Pa (- 400 Pa for
C
including -100 Pa (-300 Pa C
12)
- the duct must have been sized with a nominal temperature of the combustion products of 25°C.
- the maximum allowed recirculation rate for wind action is 10%;
- the common flue must be certified to admit an overpressure of at least 200 Pa (minimum pressure class P1);
- no draught-breaker devices must be provided in the duct system.
In particular, at the coupling point to the pressurised collective flue, a plate must be visible showing at least the following technical infor-
mation:
- the name and trademark of the common flue gas pipe manufacturer;
- suitability for operation with certified boilers C
- the maximum flue gas mass value allowed in kg/h;
- the dimensions of the common duct (collective pipe);
The openings for combustion air and the inlet of combustion products of the pressurised collective flue must be closed and their
tightness must be checked when the appliance is disconnected.
The appliance connection to the pressurised collective flue must be made as instructed, without exceeding the specific maximum exten-
sions stated.
The flue pipe of the appliance must be inclined (5% slope) towards the boiler to facilitate the evacuation of condensate.
The appliance flue gas outlet must be installed with the flue gas non-return valve kit, which ensures correct operation of the ap-
pliance and facilitates its maintenance operations.
Furthermore, the safety sticker must be affixed on the front casing. This sticker is contained in the appropriate Kit C
tains the additional exhaust flue gas non-return valve, necessary for the pressurised collective flues.
It is advisable to affix the sticker in a clearly visible position on the front casing.
When the sealed chamber is opened, combustion products may escape even when the appliance is turned off.
and C
(10)
(12)
or C
(10)
or C
, the parameter "Presence of clapet valve on flue gas" (F.1 = 1) must be enabled,
(10)
(12)
) of pressure generated by wind;
(12)
or C
;
(10)
(12)
system only with the supply of methane gas (2H and 2E categories).
(12)
emission levels are affected by
2
C
, which con-
(10)
(12)
49
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