FAQ – Frequently Asked Questions

Here are answers to some frequently asked questions about our Bluezero® Technology and the eChiller.

No: due to its design, the eChiller is currently not subject to any regulations. Neither the F-Gas Directive nor the 42nd German Federal Emissions Act for evaporative cooling apply to the eChiller.

There is no difference between the setup and installation of the eChiller and that of a conventional chiller. Please note that the eChiller is only designed for indoor use, but a dedicated machine room is not necessary. You will find all the necessary information in the operating manual, as well as a suggestion for the hydraulic connection.

There are no special requirements to consider. More detailed information can be found in the technical data sheet.

No. Because the eChiller works with a vacuum in the refrigerant circuit, no high-pressure switch is required. If the temperature level of the cooling water rises above the technically possible value at the operating point, the chilled water outlet temperature is also automatically raised.

No, only pure tap water (R718) is used for the single filling.

Additionally to regular, annual maintenance, it is also important – as with all technical systems – to check the unit for abnormalities and unusual sounds. This also includes the peripheral chilled and cooling water system (e.g. cleaning of strainers and the cooler).

Each system is principally offered with remote access. This includes continuous monitoring of performance and efficiency data, which reduces regular maintenance to a minimum. But even without remote access, the maintenance overheads are very low compared to conventional refrigeration systems.

Yes, this requires a maintenance and emergency service contract.

Yes, the eChiller has been produced since the end of 2015 and has been available as a serial appliance since the beginning of 2016.

Yes, by default the eChiller comes with a hardware interface and a data interface with the Modbus RTU and Modbus TCP protocols. All other common communication protocols are optionally available (e.g. BACnet IP, OPC UA, SNMP, Profibus DP, Profinet, etc.).

Yes, for a chilled water outlet temperature of e.g. 18° C, the eChiller is available with a 30 kW and a 35 kW compressor.

The eChiller covers a refrigeration capacity range from 20 to 300 kW.

Currently, the minimum possible chilled water outlet temperature is 10° C. However, the eChiller works optimally in a temperature range between 16° C and 22° C.

Like any conventional refrigeration machine, the eChiller must be cooled. An optimally configured cooler can be purchased from Efficient Energy if required. Information on the specifications can be found in the technical data sheet.

IT cooling, industrial process cooling (plastics industry), comfort cooling (LowEx cooling) and others.

The eChiller is especially suited to all applications with constant cooling requirements. Examples include the cooling of data centres and server rooms, as well as industrial process cooling (waste heat from plastic injection moulding, machining centres, chemical processes, bioreactors). In comfort cooling, the LowEx Cooling application (in concrete core activation, chilled ceilings) is noteworthy.

The comparison is made to a conventional chiller without free cooling.

This is technically possible, depending on the application. The implementation is currently in progress.

Yes, development, production and distribution all occur at the Efficient Energy headquarters in Feldkirchen near Munich.

Yes, this is generally possible.