We design cooling. Then we program it.

An underground wine cellar at 13.5 °C and 65 % humidity.

A cellar dug beneath a villa. Wine wants stable temperature and humidity together, summer and winter, and the machine had to sit a few metres from the house without being heard.

Existing air handling unit inside, new full-inverter condensing unit outside. Combined control of temperature and relative humidity with dew-point limit.

• Custom-built outdoor unit, full-inverter, enclosed and soundproofed.
• Two panels, two PLCs: indoor and outdoor unit, coordinated with each other.
• Logic verified in HIL simulation on the plant model before every field update.
• Touch panel in the cellar and app on the phone, with ColdCtrl supervision.

The refrigeration unit of a seaside hotel that moves its compressors where they are needed.

Breakfast, pool service, dinner: a hotel's cooling demand changes hour by hour. A rigid unit would almost always have run the wrong way.

Three variable-speed compressors with dynamic switching between the low- and medium-temperature circuits according to thermal load.

• Three variable-speed compressors, each automatically assigned to the circuit that needs it.
• Eliwell FREE Advance PLC on inverters and modulating 3-way valves, 7" HMI on the panel.
• 16 kitchen loads connected, of different brands, with HACCP history on ColdCtrl.
• Built and tested in the workshop, then installed enclosed in the garden.
• Commissioned by Benelli S.r.l., nostro partner per gli impianti frigoriferi delle cucine professionali.

A refrigeration unit you can neither see nor hear, in a Chianti village.

The new bar of a historic estate needed refrigeration for frozen goods, counters and display cases. There was no plant room: only a stone courtyard where guests stroll.

Enclosed outdoor unit with two independent circuits, LT −30 °C and MT, 20–90 Hz inverter-driven semi-hermetic compressors and floating condensing.

• One machine, two circuits: low and medium temperature, each with its own control.
• Eliwell Advance PLC with our own software, inverters over Modbus RTU.
• Enclosed and soundproofed, with the control panel in its own air-conditioned compartment.
• Commissioned by Benelli S.r.l., nostro partner per gli impianti frigoriferi delle cucine professionali.

See the project →

The condenser inside the flue.

The kitchen of a resort in a medieval village needed refrigeration for cold rooms and counters. No machine was allowed to appear on the stone walls.

Enclosed two-compressor inverter condensing unit, LT −30 °C and MT −15 °C, with a remote housed condenser ducted DN300 into a flue and an EC plug fan with floating condensing.

• Two circuits, one machine: low and medium temperature with separate suction lines.
• Invisible condenser: enclosed in a housing and connected to the flue.
• Active oil management: separator, reservoir and level regulators on the compressors.
• Commissioned by Benelli S.r.l., nostro partner per gli impianti frigoriferi delle cucine professionali.

A −40 °C blast chiller with its condensing unit 60 metres away.

So as not to disturb the neighbouring houses, the blast chiller’s condensing unit was far away: 60 metres of pipe and an 8-metre height difference. The previous compressor kept failing. We found out why and built the right machine.

Diagnosis: discharge temperature above 157 °C (evaporation −40 °C, condensing +45 °C, high superheat on the buried line) and insufficient oil return. Solution: two-stage semi-hermetic compressor with intermediate subcooler, R448A.

• Two-stage compressor: discharge temperature under control down to −45/−50 °C evaporation.
• Oil always where it belongs: separator, reservoir and automatic top-up over 60 metres of line.
• Eliwell Advance PLC with our own software and floating condensing with EC fans.
• Commissioned by Benelli S.r.l., nostro partner per gli impianti frigoriferi delle cucine professionali.

A −20 °C cold room that travels on a truck.

A demountable cold room for 4 Euro pallets, powered by the generator of the vehicle that carries it. Every watt counts here, and the control panel has to work both inside the cold and under the summer sun.

Variable-speed compressor, 20–95 Hz, on an inverter controlled via Modbus RS485, electronic expansion valve, adaptive hot-gas defrost (timed and on demand), R452A. Eliwell Advance PLC running our own software, with remote access over Modbus TCP.

• Hot-gas defrost: under 30 minutes and about 1.6 kW, instead of the 3.5 kW of electric heaters.
• Temperature-controlled panel with 24 V backup batteries: the control logic stays active for more than 4 hours with the engine off.
• Liquid subcooling and a condensate tray evaporated by the discharge gas.
• Three prototypes designed, built and tested by us: three months of road testing and over 3,800 hours of operation at −20 °C.

Three rooms, three temperatures, one compressor.

Three insulated rooms for 1000-litre tanks of a product that must stay between +10 and +25 °C all year round. Each room has its own temperature and can heat while another one cools.

One inverter condensing unit, 30–65 Hz, with R513A (non-flammable refrigerant, class A1), floating evaporation and heaters in the evaporators for heating mode. Eliwell Advance PLC with a touch HMI and 4 access levels; variables are exported over Modbus TCP to the plant’s energy management system.

• Cooling and heating in the same machine, with an independent set-point for each room.
• Capacity modulated on the real load: 6 kW of capacity for a calculated maximum load of 2 kW, without constant on-off cycling.
• Designed to EN 378 and EN 12100, factory acceptance test with data logging.
• Talks to the factory: the data feed into the customer’s energy management system (BEMS).