Components - Riello Condexa Pro2 EVO Series Installation Instructions Manual

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.
9
Safety devices must be replaced by the authorized Technical
Assistance Service only, exclusively using original parts.
4
16
14
1 Heat exchanger
2 Burner
3 Pump (or 2-way valve)
4 Smoke-exhaust flue
valve
5 Jet
6 Venturi tubes
7
12
6
5
8
2
18 18
1
3
3
9
7 Gas valve
8 Gas cock
9 Water return cock
non-return 10 Water return manifold
11 Gas manifold
12 Gas pipe
13 Condensate drain manifold

3.4 Components

Condexa Pro2 EVO is made up of a series of Thermal Units in-
stalled 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 2").
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.
15
11
18 18
3 3
17
10
13
14 Condensate drainpipe
15 Flue Manifold
16 Exhaust flue duct
17 Water flow manifold
18 Diff. Pressure switch
5
TECHNICAL FEATURES
EXHAUST
FLUE DUCT
GAS
COMBUSTIBILE
SYSTEM
INLET
SYSTEM
OUTLET
CONDENSATE
OUTLET
Figure 2