DUETTO are medium sized heat pumps designed to meet the needs for cooling and heating in large residential contexts, apartment blocks and commercial or industrial facilities. The integration of two separate machines into one distinguishes DUETTO from other products in the industry. In fact, Its double independent refrigeration circuit guarantees a wider modulation range compared to other single standard solutions. The electrical, hydronic, and refrigeration circuits are kept separate from one another to furtherly increase operational reliability.

The hydronic installation of the heat pump is simplified thanks to a single connection. The pipework connecting the two units is already built into the machine.

The DUETTO series is available in power outputs ranging from 60kW to 90kW. If more power is required, it is possible to connect up to 6 DUETTO machines in parallel and managed by GSI specific control system. A three-phase power supply is required to operate the machines

High-efficiency Full inverter technology & intelligent management

DUETTO heat pump range are outfitted with an advanced control system capable of interfacing with a wide range of compatible heating and cooling equipment. All DUETTO heat pumps are equipped with full inverter technology. Circulation pumps, valves and compressors are controlled by electronic drivers that constantly  adjust their functioning to reduce power consumption and boost efficiency.

A BUS connection allows the system to communicate with other devices. The platform developed by GSI makes it possible to monitor and operate the whole system as well as configure the machine and heating system completely and easily. The heat pump continuously modifies its operating conditions to match the specified set temperature with the least amount of energy usage thanks to an optimized working strategy.

In order to improve efficiency and guarantee the highest level of comfort, the control unit also gathers internal and external parameters. Communication and control by means of third-party management platforms through Modbus is also feasible.

The control manager can pinpoint three different set points according to the user’s needs. The maximum heating output temperature is 55°C and the minimum cooling output temperature is 7°C. Auxiliary heaters can be supplied on demand to add power to the heating circuit.

Integration with renewables

A sophisticated SW-HW renewable energy tracking system – AIER – is also available on demand. This technology monitors the power coming from PV systems and adapts the operation of the machine to increase the self-consumption of renewable energy.

The machine control system is ready to actively engage with an aggregated coordination of energy assets It is also ready to work in combination with SETA, the innovative fully-integrated PV-inverter & ESS energy manager by GSI.

Production of Domestic Hot Water

DUETTO can be combined to a storage tank or boiler for the production of DHW. The heat pump control system has an embedded logic to control any external motorized three-way valve to divert the flow to the storage.

Full-heat recovery system

DUETTO heat pumps can be, if requested, equipped with GSI "MAGIS" technology. This advanced system aims at recovering the entire waste heat generated by the compressor during standard heating and cooling operations. A dedicated circuit collects its high temperature and diverts it towards a specific heat exchanger. The energy is then transmitted to the boiler, to rise further the temperature of stored domestic hot water.

The maximum temperature possible to reach inside the storage tank through the recovery operation is 60/65°C

Future-proof WEB VISOR management and smart interface

The end user is able to monitor and control DUETTO from anywhere using a computer or smartphone by means of GSI web server technology in combination with its proprietary app and portal. Access to information and commands made simple and fast thanks to a powerful graphical interface. The control system is ready to interface with third-party control platforms such as Building Manager Systems, Energy Communities, Utility-scale systems and others. It is able to share working and status information, alarms, consumption data and performance reports.

On demand, energy meters for DHW, Heating or Cooling monitoring and control can be integrated inside the heat pump’s control platform.

Robust construction

In industrial workplaces, as well as in large residential buildings, a high level of reliability is required. The DUETTO designers put significant emphasis on the equipment's long-term resilience and endurance.

As a result of this, the DUETTO range has a higher structural resistance, a compact construction and sober design, along with a durable frame and easy access to the components. Removable panels all around the machine allow for straightforward maintenance and extremely simple installation. High-efficiency hermetic scroll compressors mounted on twin internal cushioned supports are standard on all units.

Structure and panels are made of hot-dip galvanized sheet coated RAL 7012 and RAL 2004 trims. This execution ensures corrosion resistance and thus extends its duration. The entire structural part is coated with a thick sound-absorbing material (30mm), which significantly reduces noise transmission.

Air source models

AURA DUETTO ASHP is specifically designed for hydronic heating and cooling systems. It is available in a power range from 60 to 85kW, depending on power and size.

The remote evaporator-condensing unit is available in two different bodies: upright or cube shaped.

Ground source models

AQUA DUETTO GSHP is specifically designed for hydronic heating and cooling systems. It is available in a power range from 65 to 90kW, depending on power and size.

It is suited to be connected to and operate with any geoexchange system, open or closed loop type, both vertical or horizontal.