4
TECHNICAL FEATURES
Figure 1
The insertion of a single thermal element in cascade, over the
traditional rotation of the ignition, can take place with
variable
factor of heating power load
, so that when a certain power
percentage of the first element is reached (e.g. 30%), the suc-
cessive element already starts with the same load factor. This
latter feature allows to share the power supplied inside more
than one heat exchangers with a power/exchange surface ratio
which is particularly favourable for condensation latent heat.
3.2
Advantages
− Totally pre-mixed micro-flame jet burner;
− condensing stainless steel exchanger, with efficiency up
to 109% (see “Figure 1”);
− power from 15 to 300 kW ;
− maximum exhaust flue exit temperature 80°C;
− plastic flue manifold in PP self-extinguishing (“4.11 Ex-
haust flue” page 10:
− 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 thermal
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:
− safety water differential pressure switch for each thermal
element;
− auto reset safety thermostat 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
0
It is forbidden to obstruct the condensate drain.
0
It is forbidden to pull, detach, twist the wiring coming out of
the heating unit, even if unplugged from the power supply.
0
It is forbidden to obstruct or reduce the size of air vents.
0
It is forbidden to expose the boiler to atmospheric agents (if
it is not a specific unit for outdoors).
0
It is forbidden to leave containers or flammable substances
in the premises where the boiler is installed.
0
Do not dispose of packaging material into the environment,
or leave it within the reach of children, since it can become
a potential hazard. Dispose of packaging material in com-
pliance with applicable legislation.
0
The user is forbidden to open the cupboard containing the
heating unit. Any jobs on the inside of the latter must be
done by the Technical Assistance Service or by qualified per-
sonnel.
0
It is forbidden to discard the product as household waste.
At the end of its service life, it can be consigned to specific
selected waste centres provided by the local authorities or
else to dealers providing this service. Disposing of a domes-
tic appliance separately will prevent possible harmful con-
sequences for environment and health derived from inap-
propriate disposal, likewise making it possible to recuperate
the materials it is made of with substantial savings in energy
and resources.
3
TECHNICAL FEATURES
3.1
Main features
Condexa Pro2 EVO is a condensing, modular, pre-mixed, blown,
thermal group; it is made up of a series of thermal elements
installed in battery.
A unit is made of N° 2, 3 or 4 heat exchangers, each with a mod-
ulating power from 15 to 75 kW; equipped with climatic regula-
tion and RS485 connection.
The efficiency of the generators reaches 109% based on the low-
er heat potential of natural gas (Hi) making it possible to use a
flue manifold entirely made of plastic (PP) diameter of 160mm
plus socked ends manifolds.
The system also enables continual modulation of the gas and
combustion air flow.
The Condexa Pro2 EVO heating unit is the optimum as far as op-
erating costs (up to 109% efficiency per Hi, see ) reliability and
flexibility. In fact, thanks to the new heat exchanger with im-
proved power, to the new electronic management, to the mod-
ularity and versatility, it is possible to make a rapid connection
to any kind of heating system and storage hot water production
with the possibility to manage three circuits operating at three
different temperatures.
