Riello Condexa Pro3 230 IN V02, Руководство по установке, Страница: 5 / 44

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TECHNICAL FEATURES
3.2 Advantages
− Totally pre-mixed micro-flame jet burner;
− condensing stainless steel exchanger, with efficiency up
to 109% (see Figure 1);
− power from 23 to 115 kW ;
− possibility to manage 32 thermal units (burners) in series
for a maximum power of 3680 kW;
− maximum exhaust flue exit temperature 80°C;
− plastic flue manifold in PP self-extinguishing (see par
4.8):
− water manifold, condensate and smoke manifold inside
the boiler;
− quick connection of both water, condensate and flue
manifolds (with exit on the right and left side);
− weather temperature adjustment device supplied;
− modulating and modular regulation of the single ther-
mal elements power;
− automatic changeover (at adjustable time intervals) of
the burners ignition order;
− choice of the cascade insertion criteria of the burner
(power %);
− hot water and systems control at different temperatures,
with or without function priority;
− automatic summer/winter switch-over;
− anti-legionella mode (only available with remote con-
trol);
− hour and week programming schedule (only available
with remote control);
− minimum flow capacity of thermal carrier fluid controlled
by a differen-tial pressure switch;
3.3 Safety devices
All the functions of the thermal module are electrically con-
trolled. Any anomaly causes the lock out of the single thermal
element and the automatic shut down of the gas valve.
The water circulation system includes:
− auto reset safety thermostat for each thermal element;
− safety water differential pressure switch for each thermal
element;
− temperature probe on each thermal element flow and
return. Probes are managed by an electronics homolo-
gated for safety performances and with a double proces-
sor technology. Such device allows to continually control
both flow temperature and the
Δ
t between flow and re-
turn of the battery element;
− modulating flow temperature regulation for both single
elements and the whole battery.
The combustion system includes:
− gas electro valve in B+C class for each thermal element,
with gas flux pneumatic compensation according to the
inlet air flow ( air/gas 1:1 ratio);
− ionization electrode for continual flame control;
− flue pipes temperature control for each thermal element.
Protective actions and therefore closure of gas valves on each
heating unit are activated in the following cases:
− flame burnt out;
− over-temperature in exchanger system;
− high temperature of exhaust fumes;
− reduced air flow.
0
The appliance must not be started up, even temporarily,
where the safety devices have been mishandled or exclud-
ed.
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Safety devices must be replaced by the authorized Technical
Assistance Service only, exclusively using original parts.
3.4 Components
Condexa Pro3 IN-EXT is made up of a series of Thermal Units
installed in battery placed inside a metal casing.
Each thermal unit is connected to the system in parallel posi-
tion as compared to the others, through a flow, return, gas, flue
manifold and condensate discharge manifold.
According to the heat demand, the regulation system switches
on and regulates the single thermal units in order to guarantee
an optimal balance between power required by the system and
power supplied by the boiler (see Figure 1).
Each Condexa Pro3 IN-EXT can be serially matched up with oth-
er similar boilers, even with different power, in order to make
modular heating thermal plants made up of several “casings”
which shall be hydraulic connected and controlled by a single
modular boiler integrated inside each single unit.
This regulation system has many advantages: maximum ex-
ploitation of the condensation technology, excellent modularity
of each single boiler and of the whole the battery ones, ratio of
the system modulation equal to 1:157 in order to cover any pow-
er range from 23 to 3680 kW.
All these features contribute to maximize the economy of the
condensing boiler and to allow an excellent system-boiler
matching.
The ignition order of each single burner is fully managed by a
microprocessor logic device which ensures an equal number of
working hours to each thermal unit.