NEXPRO ACS is the Riello solution dedicated to domestic hot water production in residential applications.

The unit consists of a heat pump and a tank. The heat pump, placed directly on the upper part of the tank,

uses the thermal energy of the air to heat the water contained in the tank.

The air is sucked by a centrifugal fan that allows the heat pump to operate in recirculation or through pipes with a DN 160 diameter. 

The energy recovered is then transferred to water by an external exchanger located around the external surface of the tank, thus avoiding maintenance costs.

The high efficiency of NEXPRO ACS derives from a refrigeration circuit in R1234-ze, a high efficiency compressor, an electronic

expansion valve and a bypass valve for hot gases to allow the operation up to -5 °C.

The tank are enameled and a 1,5 kW electrical resistance as standard supply (for the versions without coil).

The resistance accomplishes the four main functions: additional heating, frost protection, emergency heating and anti-legionella

protection.

The whole system is managed and adjusted by an "intelligent" control device, to allow the best operation of each component.

– DHW production up to a temperature of 62 °C

– High efficiency coefficient

– Additional electrical resistance of 1,5 kW as standard (for the versions without coil).

– NEXPRO 250 S ACS model can be combined with an additional heat source (solar or boiler)

– Possibility of connecting the machine to a photovoltaic system via Smart Grid connection (supplied as an accessory)

– Operation range -5 °C/+35 °C

– Corrosion protection with magnesium anode and enamelled tank

– Highest efficiency energy efficiency class: A+