Description Of The Appliance; Safety Devices - Beretta POWER MAX Installation And Operation Manual

1.3 Description of the appliance

it is a condensing, pre-mixed thermal module consist-
POWER MAX
ing 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 in-
stallation to guarantee an IPX4D protection level.
b
appliances may be cascaded to reach a maxi-
POWER MAX
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 POWER MAX 50 P DEP - POWER
MAX 50 P, double coil for models POWER MAX 65 P ÷ POWER
MAX 150), to guarantee a good corrosion resistance 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-diagnos-
tics, shown by means of a display, and logging of main errors;
- Anti-Frost function;
- provision for room thermostat / heat request on high or low tem-
perature zones;
- option to manage a CH circuit and a DHW circuit with storage
tank;
- high-efficiency and high residual discharge head circulator
(for models up to 68kW; a circulator is available as an acces-
sory 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 proces-
sor 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 meas-
ure 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 .
b
The triggering of safety devices indicates the malfunction of
a potentially hazardous thermal module. Therefore, contact
Technical Assistance Centre immediately. After a brief pause,
it is possible to try and restart the appliance (see Paragraph "
Initial startup").
b
Safety devices must be replaced by Technical Assistance
Centre, using only original parts. Refer to the spare parts cat-
alogue supplied with the appliance. After making the repair,
check that the appliance is working properly.
a
The appliance must not be put in service, even temporarily,
when tampered safety devices are not in operation or have
been tampered with.
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