5
GENERAL INFORMATION
1.3
Description of the appliance
Condexa PRO
it is a condensing, pre-mixed thermal module
consisting in a modulating thermal element.
It is available in various models, ranging from 34,9kW to 131kW.
Optimal combustion management supports high yields (over
109%, calculated over NVC, in condensation regime) and low
polluting emissions (Class 6 pursuant to EN 15502).
The thermal module is designed for open chamber operation,
but can be converted to sealed chamber operation by fitting a
dedicated accessory.
The appliance in standard configuration is envisaged for indoor
installation to guarantee an IPX4D protection level. The appli-
ance may also be installed outdoors by fitting a special accesso-
ry that increases its electric protection to IPX5D.
9
Appliances may be cascaded
Condexa PRO
to reach a maxi-
mum power of 1.12 MW.
The appliance's key technical features are
− pre-mix burner with constant air-gas ratio;
− helical type heat-exchanger, coil with smooth stainless
steel tube (single coil for models Condexa PRO 35 P - Con-
dexa PRO 50 P, double coil for models Condexa PRO 57 P ÷
Condexa PRO 135), to guarantee a good corrosion resist-
ance and the possibility of working with high
Δ
t (up to
40°C) reducing the time of set-up;
− power from 34,9 to 131 kW;
− maximum flue gas output temperature 100°C;
− microprocessor management and control with self-di-
agnostics, shown by means of a display, and logging of
main errors;
− Anti-Frost function;
− provision for room thermostat / heat request on high or
low temperature zones;
− option to manage a CH circuit and a DHW circuit with
storage tank;
− high-efficiency and high residual discharge head circu-
lator (for models up to 68kW; a circulator is available as
an accessory upon request for other models);
− climate control function (available only when using the
outdoor temperature sensor accessory).
1.4
Safety devices
All appliance functions are electronically controlled by a dual
processor technology board approved for safety functions.
Any malfunction results in the appliance being shut down and
the automatic closure of the gas valve.
The following is installed on the water circuit:
−
Safety thermostat
.
−
Flow sensor
capable of monitoring the main circuit's
flow on an ongoing basis and of stopping the appliance
in the event of insufficient flow.
−
Temperature probes
on delivery and return lines that
measure the temperature difference (
∆
t) between input
and output fluid and enable activation of the control.
−
Minimum pressure switch
.
The following is installed on the combustion circuit:
−
Gas solenoid
in class B+C , with pneumatic gas flow com-
pensation depending on the suction line's air flow rate.
−
Ignition/detection electrode
.
−
Flue gases temperature probe
.
9
The triggering of safety devices indicates the malfunction of
a potentially hazardous thermal module. Therefore, con-
tact Technical Assistance Service immediately. After a brief
pause, it is possible to try and restart the appliance (see
Paragraph "Initial startup").
9
Safety devices must be replaced by Technical Assistance Ser-
vice, using only original parts. Refer to the spare parts cata-
logue supplied with the appliance. After making the repair,
check that the appliance is working properly.
0
The appliance must not be put in service, even temporarily,
when tampered safety devices are not in operation or have
been tampered with.
