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DESCRIPTION OF THE APPLIANCE
The aluminium ALU PRO POWER boilers are modular
condensing heat generators for heating systems and
when used with storage cylinders, for producing domes-
tic hot water.
The generator is based on a cascade of independent 75
kW thermal modules, managed in sequence by cascade
control.
The modules are connected to each other using a deliv-
ery collector, a return line collector and a flue gas collec-
tor with a single condensate drain.
The number of modules ranges from 1 to 8 for outputs
ranging from 75 to 600 kW. This logic allows you to
ensure a high degree of continuous service and a high
degree of modulation (up to 40:1 for the 600 kW model).
The aluminium elements with a low water content
have large exchange surface for maximising the heat
exchange, energy efficiency, thermal equilibrium obtain-
ing high condensation yields.
The stainless steel with continual total premix burner
provides stable and quiet combustion
with low pollutant emissions (NOx class).
Mixing takes place using a venturi tube upstream of the
fan.
The adjustment of the sequence is carried out with a
SAFETY DEVICES
The ALU PRO power condensing boiler has the following safety devices:
Safety thermostat with manual reset, intervenes when the
boiler water temperature exceeds 99°.
Water pressure switch intervenes when the water circuit
pressure is less than 0.5 bar.
Water circuit diagnosis checks the temperature differ-
ence between delivery and return (∆T).
Flue gases safety, a probe intervenes when an increase
in the temperature of the flue gases indicates the gases
themselves are not being vented correctly.
Gas pressure switch intervenes if the gas supply pres-
sure is less than 10 mbar.
6
GENERAL
climate logic, with an outdoor temperature sensor, and it
allows you to regulate the outlet temperature according
to the outside temperature.
The ALU PRO POWER boiler, in its turn, can be man-
aged in cascade logic in a system composed of up to 8
boilers, using a second level master (see RVS) thereby
creating boilers up to 4.8 MW.
The sequence control on-board the boiler is set up to
manage a pump (primary or system depending on the
parametrisation) with modulating logic controlled with a
0-10V DC signal.
The sequence control can in any event be controlled with
a TA, OT+ input or a 0-10V DC signal.
It is also possible to display the error codes on the dis-
play and the connections for diagnostics with a PC.
The boilers are supplied to operate with G20 methane
gas. However, they can operate with G25 or G31 gas
using the conversion kit supplied (for Belgium this type
of conversion is prohibited).
b
The intervention of the safety devices indicates a
boiler malfunction, which is potentially dangerous,
therefore immediately contact the r Technical
Assistance Centre. In any event, you may attempt
to restart the boiler after a short wait (see chapter
on initial start-up.
a
Never start the boiler up, even for a short period, if
the safety devices are not functioning correctly or
have been tampered with.
b
Replacement of safety devices must be performed
by the r Technical Assistance Service, using
only original components. Refer to the spare parts
catalogue supplied with the boiler. After making the
repair, check that the boiler is working properly.
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