Description Of The Appliance; Safety Devices - Beretta POWER MAX 50 P DEP Installation And Operation Manual

1 3 Description of the appliance

it is a condensing, pre-mixed thermal module
POWER MAX
consisting in a modulating thermal element.
It is available in various models, ranging from 35kW to
131kW.
Optimal combustion management supports high yields
(over 109%, calculated over NVC, in condensation re-
gime) and low polluting emissions (Class 6 pursuant to EN
15502).
The thermal module is designed for open chamber opera-
tion, 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.
b
Appliances may be cascaded POWER MAX to reach
a maximum power of 1.12 MW.
The appliance's key technical features are
- pre-mix burner with constant air-gas ratio;
- helicoidal heat exchanger with double coil with
smooth stainless steel pipe, to guarantee good corro-
sion resistance and the option of operating with high
∆ts (up to 40°C), reducing system set-up times;
- power from 35 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;
- pre-setting for room/heat demand thermostat for low
and high temperature ranges;
- option to manage a CH circuit and a DHW circuit with
storage tank;
- high-efficiency and high residual discharge head cir-
culator (for models up to 70kW; a circulator is availa-
ble 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 func-
tions.
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 appli-
ance 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
compensation depending on the suction line's air
flow rate.
- Ignition/detection electrode .
- Flue gases temperature probe .
b
The triggering of safety devices indicates the mal-
function of a potentially hazardous thermal module.
Therefore, contact Technical Assistance Centre im-
mediately. 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 Assis-
tance Centre, using only original parts. Refer to the
spare parts catalogue 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 tem-
porarily, when tampered safety devices are not in op-
eration or have been tampered with.
5