+34 96 313 42 04 info@eliwell.es
How to unlock IDNext

How to unlock IDNext

tutorial cover How to unlock an IDNext

How to Unlock an IDNext is motivated by the request of a customer who in the last training we did in Eliwell Ibérica asked us for a very graphic video to show it to the rest of the team.

Said and done. We sent it to you and also thought it was a good material to share with the rest of our installer and/or distributor customers.

There are two ways of unlocking: fast and permanent way.

In the following tutorial we show you in the most graphic way how to unlock an IDNext electronic control. Follow the video instructions step by step.

If you still have any questions, please contact Eliwell Ibérica's technical service at:

sat@eliwell.es / 96 313 42 05


More about IDNext

IDNext is the new generation of refrigeration controls. Multiprobe thermostats suitable for use in appliances equipped with flammable refrigerants as they comply with the IEC 60 335-2-89 standard

IDNext is compatible with most models of variable speed compressors available on the market. Auto-tuning function allows for easy configuration of the control

IDNext features a new additional defrost algorithm that improves defrost performance and allows upgrading existing chillers without any hardware changes

IDNext is Green Premium, Shneider Electric's eco-mark that certifies that the product complies with RoHs Directive and REACH regulation.




DOMINO, efficient control of low superheat

DOMINO, efficient control of low superheat

Eliwell's DOMINO System, the efficient low reheat control solution for high and low temperature refrigerated cabinets.


Efficiency and Simplicity

Superheat control in refrigerated cabinets is a key factor in increasing cabinet efficiency and maximizing evaporator capacity.


This translates into lower operating costs and reduced environmental impact.

A classic approach to superheat control is the use of PID regulation. Unfortunately, when we set ourselves the ambitious goal of running furniture with extremely low superheat, we run up against the limitations of such an approach; liquid leaving the evaporator which implies loss of efficiency, liquid return to the compressor or an unstable system, with a highly variable superheat level.

Eliwell2 Refrigerators

The DOMINO reheating system under DOMINO developed by Eliwell is based on a mathematical model of the evaporator thermodynamic cycle, which tracks evaporator filling, anticipating and limiting excess refrigerant. The controller performs an estimation of the refrigeration cabinet characteristics that takes into account, among other things, any errors or delays in the measurement, non-optimal valve size and refrigerant velocity.

In addition, the DOMINO system is a predictive system, i.e. the model is constantly updated to compensate for changes in the refrigeration plant or cabinet. This allows to obtain a low superheat in all operating conditions with significant energy savings in the installation.


The modulating systems of electronic expansion valves are based on superheat values at the evaporator outlet, this superheat depends on the opening degree of the expansion valve, as well as on the absorbed heat.Eliwell3 Refrigerators

Conventional systems use PID algorithms to decide the opening degree of the electronic expansion valve at a given instant based on the superheat value measured at the evaporator outlet.

The PID algorithm is the most commonly used when there is no knowledge of the process to be controlled, since an acceptable response can be obtained by adjusting only 3 variables. The 3 control variables are those that give name to the algorithm, P - Proportional, I - Integral and D - Derivative.

Usually the first 2 components are used, Proportional and Integral P+I and in some cases the derivative component D is added.

Some factors such as the non-linearity of the expansion valves, delay in measurement and control action and other key factors for regulation such as evaporator filling time or refrigerant speed mean that the PID algorithm does not allow low and stable superheat values to be obtained.

To avoid these oscillations, a higher superheat value is set and the evaporating pressure is lowered to avoid liquid leakage from the evaporator.


In order to compare the performance of the PID control with that based on the mathematical model, a series of tests have been carried out with different refrigeration units.

The furniture has been installed in a climatic chamber that controls the temperature and humidity with values of 25ºC and 60 %Hr. For the comparative study, temperature and humidity measurements were taken every minute.

Three flow probes, three return probes and two inertia probes have been installed in each of the refrigerated cabinets. In addition, 2 temperature and 2 humidity probes have been installed in the climatic chamber for its control.

Furniture has been placed in the chamber to simulate the operation of a real installation.

Eliwell4 Refrigerators

The refrigeration units are connected to a refrigeration unit with R134a refrigerant with speed regulation on the first compressor and on the condensing fans.

The following image shows a refrigeration cabinet where a PID algorithm based control system and the system based on the mathematical model of the evaporator have been installed. The cabinet is located in a temperature and humidity controlled chamber where there are also other refrigeration cabinets in operation.

Eliwell5 Refrigerators

Multiple ambient temperature probes have also been installed in the refrigerated cabinet, as well as an inertial probe to analyze the temperature behavior with the different options.

The 2 tests were carried out with the same refrigeration cabinet, the same electronic valve and the same refrigeration plant, simply changing the controller control firmware, one with a PID algorithm and the other with an algorithm based on a mathematical model of the evaporator thermodynamic cycle.

During the simulation, several operational tests have been carried out with the system based on the PID algorithm. Specifically, tests have been carried out with evaporation temperatures of -10ºC, -8ºC, -6ºC, -4ºC and finally with evaporation temperatures of -2ºC.

During the different tests it has been verified that with evaporation temperatures down to -6ºC, the controller with PID algorithm correctly maintains the temperature of the refrigerated cabinet and its operation is correct. If, on the other hand, evaporation is increased above this value, the superheat behavior becomes unstable and, in order to avoid liquid leakage, the parameters of the PID algorithm had to be modified without obtaining sufficient stability in the refrigerated cabinet temperature.

During the tests it is intended to maintain a temperature of 0ºC in the cabinet.

Eliwell8 Refrigerators

The picture shows the superheat value with PID control in the upper part in red and with mathematical model-based control in the lower part in red.

The system with mathematical model maintains the superheat between 5.4 and 4.3 superheat values, while the PID system between 6.1 and 2.5 values.

The picture shows the behavior of the opening degree of the valve. It can be seen how the system based on the mathematical model (below in green) maintains at each instant the right amount of refrigerant needed by the refrigeration cabinet.

With an evaporating temperature of -2ºC and a superheat setting of 4ºC the system with PID algorithm tries to maintain the set superheat value, but as the refrigerant takes some time to travel through the evaporator, there is a time lag between the signal sent to the valve and the superheat value.

On the contrary, the system based on a mathematical model adapts to the value of the time needed to run through the evaporator, allowing to anticipate what is going to happen, so that it injects the right amount of refrigerant with low superheat values and allowing to maintain the temperature of the refrigerated cabinet with an evaporation temperature of -2ºC.

The following image shows the temperature value of the furniture. At the top with the PID algorithm and at the bottom with the mathematical model-based system.

Eliwell9 Refrigerators

As can be seen, the system using the mathematical model allows maintaining the temperature with average values of 1ºC, while the system using the PID algorithm cannot maintain the temperature within the required limits.

In addition, the PID-controlled system has oscillations in the chiller temperature due to the superheat oscillation and because the PID of the electronic valve conflicts with the PID of the central compressor controller. This means unnecessary compressor starts and stops.

On the other hand, the system based on the mathematical model allows the compressor equipped with a variable speed drive to be kept in operation, with both algorithms tuned to each other.


Let us now look at a practical application where the solution based on the mathematical model of the Eliwell evaporator has made a difference.

We chose a medium-sized installation, a 1,200m2 supermarket with 9 refrigeration cabinets, a positive temperature chamber, 3 freezer cabinets and a freezer chamber.

The TranscriticalCO2 booster control unit consists of 3 compressors for positive temperature and 2 compressors for negative temperature. The electronic control of the refrigeration plant was carried out with an EWCM 9000 PRO / CO2T DOMINO unit.

Eliwell10 Refrigerators

In this plant, the evaporation pressure has been increased from 25 Bar to 30 Bar, achieving an energy efficiency of more than 10%. The possibility of further increasing the pressure up to 32 Bar can mean at least another four percentage points of consumption optimization, ensuring not only maximum efficiency and sustainability of the solution, but also the quality of conservation.

With traditional PID control, it can be seen how the working capacity of the compressors in the refrigeration plant shows typical oscillations of this type of control, producing activations for short periods of time.

With the DOMINO system, however, it is possible to verify that the plant operates at constant load, significantly reducing the number of compressor interventions.

At the same ambient conditions, the number of compressor starts and stops is reduced from 50-80 to only 10 per day, allowing the evaporation rate to be increased to 30 Bar (-4ºC).

In addition, by equipping the system with Eliwell's TelevisGO supervisory electronics and thanks to its algorithm for analyzing the temperatures of furniture and chambers, it would be possible to further increase evaporation up to 32 Bar (-2ºC).

One of the improvements in the operation of the mathematical model system is that it avoids evaporator draining and allows better maintenance of the refrigeration cabinet temperature.

The following images show the behavior of 3 pieces of furniture in ON-OFF and modulating operation.

In red the values of cabinet 1, in blue those of cabinet 2 and in green those of cabinet 3.

Eliwell11 Refrigerators

The image shows the stability of the ambient temperature in the refrigerator cabinet itself.

Eliwell12 Refrigerators

In the previous image, it can be seen that the classic PID superheat control systems enter in certain operating conditions, in resonance with the evaporation control of the refrigeration plant. This results in superheat oscillations and therefore in risk of liquid return, to solve this behavior the superheat set is increased.

The system based on the mathematical model of the evaporator allows the use ofCO2 with superheats between 4K and 2K, seeking maximum heat exchange in the evaporator, without liquid return to the compressors.

Eliwell13 Refrigerators

The picture shows the operation of the expansion valve. It should be noted that the valves used are of the pulse type, since they are the ones that allow a quick response in the control of liquid injection into the evaporator.

As shown in the image, the classic PID controls vary their opening percentage from 0% to 100% without obtaining stability in the superheat and penalizing the thermal exchange.

On the contrary, the regulation based on the mathematical model of the evaporator obtains a continuous modulation, with constant mass flow, allowing a tuning between the evaporator control and the control of the refrigeration plant.


The energy consumption of a positive power plant of a real installation has been monitored. This analysis is based on the work methodology according to the standards developed in the international measurement and verification protocol developed by the EVO savings verification organization.

The main objective of this analysis is to verify the energy savings obtained with the installation of the mathematical model based device with superheat at 4K and evaporation during the night at (-2.5ºC) and during the day at (-4.8°C) versus a PID controller with superheat at 10K and evaporation of (-10ºC).

The plant's energy consumption data are shown below.

Eliwell14 Refrigerators

Eliwell15 Refrigerators


Traditional systems with PID algorithm can generate liquid outflow from the evaporator or make the system unstable, with time-varying superheat values.

On the contrary, with the system based on the mathematical model of the evaporator, low superheat is obtained in any operating condition with significant energy savings in the refrigeration plant.

In the same way, this system provides stability in the temperature of each refrigerated cabinet, due to the fact that the superheat value is more stable (obtained with pulsed electronic valves for a faster response speed).

This increase in evaporating pressure stability means a reduction in the number of compressor start-stop cycles, which is beneficial in terms of maintenance and increases the compressor life cycle, reducing plant management costs.

It must be remembered that each installation has a stable, ideal minimum superheat, which depends on many factors, including those external to the regulation. The algorithm based on the mathematical model of the evaporator manages to find this minimum value and set it at a very low value, close to 4K.



Eliwell at the C&R FORUM 2019

Eliwell at the C&R FORUM 2019

Among the parallel activities organized by IFEMA on the occasion of the fair Air Conditioning and Refrigeration #C&R2019, highlights the celebration of the C&R FORUM, a must where you can learn about the most innovative technical approaches of the exhibitors of the event.

Eliwell Ibérica, has been selected on this occasion to lead the hand of Nacho Baixauli, technical manager, two presentations focused on monitoring and control in areas such as refrigeration and applications globally in supermarkets.

If you would like to attend these C&R FORUM presentations, make a note of the following appointments. Admission is free until full capacity is reached.

Efficient solution with low evaporator superheat based on a mathematical model

Location: ROOM 1 located in Hall 6 of C&R.

Date: February 27

Schedule: from 6:00 pm to 6:20 pm

Integration of multiple specialized systems in supermarket applications

Location: ROOM 1 located in Hall 6 of C&R.

Date: February 28

Schedule: from 4:00 pm to 4:20 pm

If you still don't have your ticket for the #C&R2019 Air Conditioning and Refrigeration show, register for free HERE.

Eliwell Training

Eliwell Training

We start the year with what we love the most, with #Eliwell training.

Next Thursday, January 24, in our facilities in Paterna we will have a course to learn more about our RTX600, EWCM EO and COLDFACE NT equipment.

If you are interested just send an email to sat@eliwell.es indicating the number of attendees and their names.

We are waiting for you!

Eliwell III Training Days

Eliwell III Training Days

Come and learn at our FREE TRAINING DAYS

Next Thursday, December 1st, we will hold a new training day open to all installers and customers of Eliwell Ibérica.

During the event, you will be able to learn more about our new products: Systems, Televis and Compact.

The different sessions will be held at our facilities in the technology park in Paterna, where the Technical Service staff will answer any technical questions about the installation and configuration of Eliwell equipment.


Eliwell Training Days

Eliwell Training Days

Eliwell trainingCome and learn at our FREE TRAINING DAYS

Next Thursday, February 25, we will hold a new training day open to all installers and customers of Eliwell Ibérica.

Throughout the day, you will be able to catch up on our new products: Compact, Televis and EWCM 9x00.

The different sessions will be held at our facilities in the technology park in Paterna, where the Technical Service staff will answer any technical questions about the installation and configuration of Eliwell equipment.

Reserve your place by sending an e-mail to sat@eliwell.es.


:::: Agenda ::::

10:00 - 10:20 Introductions and explanation of the day's agenda

10:20 - 11:00 EWCM 9X00 EO Presentation

  • Hardware
  • Replacement of EWCM 9X00 power plants with EWCM 9X00 EO

Break - 20'.

11:20 - 13:20 EWCM 9X00 EO

  • Installation
  • Start-up (Quick Start)
  • Parameters
  • Installation simulation

13:20 - 13:40 Device Manager

13:40 - 14:00 Questions and comments

Midday break

15:30 - 15:40 Presentations and explanation of the afternoon's agenda

15:40 - 16:10 How to install Televis?

  • RS-485 wiring and connections.
  • Bus Adapter
  • Device connection
  • Device programming
  • Others: Lan Adapter

16:10 - 17:45 Compact 600/ Televis Go

  • Installation
  • Start-up
  • Temporal/historical data and graphs
  • General orders.
  • RVD / Parameters
  • Access control, activity planning.
  • Alarm configuration

Break - 20'.

  1. 1. Management of time intervals
  2. 2. Stock management
  3. Alarm class management
  • Driver and software updates

17:45 - 18:10 Remote Connections

  • Web (external connection)
  • VNC (external connection)

18:10 - 18:30 Questions and Answers


We are waiting for you!

Reserve your place by sending an email to