How to set the temperature in a Coca-Cola refrigerator: instructions

Corporate refrigeration equipment operating under the Coca-Cola brand is an integral part of retail and catering, providing the correct storage conditions for carbonated drinks. Optimal temperature The inside of the chamber is critical not only to preserve the taste of the product, but also to prevent freezing of the liquid, which can lead to rupture of the container. Owners of point of sale and service personnel often have to deal with the need to manually adjust parameters when standard factory settings no longer correspond to operating conditions.

The process of changing settings depends on the type installed electronic controlleras cabinet manufacturers use different climate control systems. In this article, we will analyze in detail the action algorithms for the most common models of thermostats, such as Dixell, Carel and Eliwell, which are most often found in Coca-Cola display cases and refrigerators. Understanding the logic of the operation of these devices will allow you to quickly adapt the equipment to the current load and ambient temperature.

Incorrect settings can lead to drinks becoming too warm or, conversely, turning into ice porridge, which is unacceptable for business. Digital thermostats allow you to set the required range with high accuracy, but require careful handling with programming menu. We will consider not only the basic settings, but also hidden parameters that affect defrost cycles and fan operation.

Optimal temperature conditions for drinks

For carbonated drinks presented in the Coca-Cola line, the ideal range is considered to be from +3 to +5 degrees Celsius. It is at these values ​​that carbon dioxide dissolves best in liquid, providing the characteristic sharpness and taste when opening a bottle or can. If the temperature rises above +7 degrees, the drink becomes “flat” (exhausted), and when it drops below 0 degrees, crystallization of the water contained in the composition begins.

It is important to consider that the temperature sensor is usually located at a certain point in the chamber or on the evaporator, so the actual air temperature in different areas of the cabinet may differ. Thermal inertia products also play a role: a full refrigerator will keep it cold longer, but cooling after loading warm products will be slower. Therefore, the controller settings should have a small margin.

There are specific requirements for different types of containers. Glass cools slower than plastic, and aluminum cans react to changes in mode almost instantly. Heat removal system commercial refrigerators often work harder than domestic ones, which requires more precise calibration to avoid wasting electricity.

⚠️ Attention: Setting the temperature below +1 degrees Celsius creates a high risk of rupture of aluminum cans and glass bottles due to the expansion of freezing liquid. This can damage the evaporator and lead to a refrigerant leak.

When setting up the equipment, you must rely on the readings of an external thermometer located in the center of the working area, and not just on the numbers displayed on the controller display. Sensor calibration may become lost over time, especially in humid or vibrating environments. Regularly checking actual values helps maintain brand quality standards.

Identifying the type of control controller

Before you start changing parameters, you need to identify the model thermostat installed in your Coca-Cola refrigerator. The appearance of the control panel may vary, but the manufacturer's logo is usually located on the front side or becomes visible when the decorative cover is removed. The most common are devices from Italian manufacturers, which have proven themselves to be reliable in the commercial sector.

Controllers with one or two control buttons are often found, as well as more complex versions with a digital display and several navigation keys. Interaction interface The user experience varies from brand to brand, so there is no universal combination of buttons for all models. An error in device identification may result in you trying to enter the menu of a non-existent function.

Pay attention to the markings on the device body. This could be a series Dixell XR, Carel IR or Eliwell. It is also important to distinguish between simple thermostats, which only maintain the temperature, and complex controllers, which also control fans, lighting and an anti-condensation heating system. The latter have a more extensive settings menu.

If you cannot visually identify the model, you should look at the technical data sheet of the equipment or find a sticker with characteristics on the back wall of the refrigerator. It will often indicate the type of electronics used. In some cases, especially in older models, there may be mechanical controls where adjustment is made by turning a knob, but in modern Coca-Cola equipment digital control predominates.

Setting up Dixell controllers

Dixell controllers, such as the XR20C or XR60C series, are widely used in Coca-Cola refrigerators due to their simplicity and reliability. Entering the programming menu typically requires pressing and holding the setup button (often labeled Set) for a few seconds until the parameter code appears on the display. The standard holding time is about 3-5 seconds, after which the device goes into editing mode.

The main parameter that interests us is temperature setting (Set Point). In the menu it is often indicated as St or SP. Changing the value is done using the up and down arrow buttons. After selecting the desired value, you must confirm the change by pressing again Set, or wait for the automatic exit from the menu if the device supports a timeout.

In addition to the main temperature, in Dixell controllers you can configure hysteresis (differential), which is designated as Hy. This parameter determines how many degrees the temperature must rise for the compressor to turn on again after being turned off. For example, with a setpoint of +4°C and a hysteresis of 2K, the compressor will turn off at +4°C and turn on at +6°C. Too little hysteresis will lead to frequent starts, which is harmful for the compressor.

It is also worth paying attention to the parameter protecting the compressor from frequent restarts, often designated as ton or CP. It sets the minimum downtime between turning the unit off and on again. For Coca-Cola equipment operating in intensive mode, it is recommended to set this interval to at least 3-5 minutes in order to extend the life of the refrigeration unit

⚠️ Attention: When changing parameters in Dixell controllers, do not forget to save the settings. If you exit the menu without confirmation (for example, simply stop pressing the buttons before the timer expires), the changes may not be applied.

Adjusting Carel and Eliwell thermostats

Carel equipment, especially the popular series IR32 and IR33, has its own specific menu. Entering the programming mode is carried out by long pressing the key Set (usually 3 seconds). A flashing indicator or code of the first parameter will light up on the screen. Navigation through the parameters is carried out by short presses of the same button, and changing values ​​is carried out using the arrow keys.

In Carel controllers, it is important to correctly configure the parameter compressor differential (often dIF). For refrigerators with drinks, where stability is important but ultra-precise freezing is not required, a value of 2-3 degrees is considered optimal. This avoids “swinging” of temperature, which can negatively affect the carbonation of drinks.

Eliwell thermostats, such as series EW961 or EW971are also often found in shop windows. The logic of their operation is similar to the previous ones: hold down the button Set to enter, navigate with short presses. In these controllers, special attention should be paid to the sensor calibration parameter (oF or Cor), if the readings on the display diverge from reality by more than 1 degree.

When working with any of the listed controllers, it is important to remember the existence of factory passwords or access levels. Basic settings (temperature) are always available, but to change technical parameters (sensor type, operating logic) you may need to enter a code. Usually this is a combination of buttons or sequential key presses.

Specific settings of defrost and fans

In Coca-Cola refrigerators, especially in glass display cases, it is extremely important to correctly set the defrost cycles, even if the evaporator is not clearly frozen. Air humidity indoors can lead to the formation of condensation on the glass and inside the chamber, which spoils the presentation of the product. Controllers allow you to set the interval between defrosts (for example, every 6 hours) and their duration.

For equipment that works with drinks, defrosting is often used by the time the compressor is turned on or simply by a real-time timer. It is important not to overdo it: defrosting too often or for a long time will lead to an increase in the temperature in the chamber and heating of the drinks. The optimal duration of the defrost cycle for such cabinets is 15-20 minutes, but this depends on the power of the evaporator heating element.

The operation of the evaporator fans deserves special attention. In some modes (for example, during defrost or when the door is open), the fans must stop to avoid heating up. The parameter Fan Delay (delay in turning on the fan after stopping defrosting) allows you to first cool the heating element so that hot air does not get on the food. Usually this delay is 1-2 minutes.

Diagnostics and elimination of typical problems

After setting the temperature, a situation may arise when the refrigerator does not reach the set mode. If the compressor runs continuously, but the temperature does not drop, this may indicate a refrigerant leak or a malfunction of the compressor, and not an error in the settings. Electronics cannot compensate for technical breakdowns, it only controls serviceable components.

A frequent problem is the “lies” of the sensor temperature. If the controller shows +2°C and the drinks are warm, then the sensor requires replacement or calibration. In some controller models, you can enter a correction factor, but physically replacing the element is a more reliable solution. Sensors in commercial equipment often fail due to vibration when frequently loading goods.

If the refrigerator begins to turn on and off (clock), check the hysteresis value. Too narrow a range (less than 1 degree) causes the compressor to work in a ragged rhythm, which quickly disables it. It is also worth checking the tightness of the doors and the presence of “thermal bridges” in the cabinet design.

⚠️ Attention: If, after resetting the settings to factory settings (Reset), the refrigerator no longer controls the temperature correctly, hidden configuration parameters (sensor type, operating logic) may have been changed. In this case, reprogramming using the factory code is required.

Do not ignore error codes that may flash on the display (for example, E1, E2). They directly indicate a problem with the sensor (open or short circuit). An attempt to “deceive” the system by short-circuiting the sensor will lead to emergency operation and possible defrosting of all Coca-Cola products.

Frequently asked questions (FAQ)