Owners of Russian-made equipment often wonder what kind of refrigerant circulates in their units, especially when the equipment stops freezing. Understanding the type of gas used is critical for the correct repair and selection of a service service. Biryusa refrigerators, produced by the Krasnoyarsk plant, over its long history, several generations of compressors and cooling systems have been replaced, which directly influenced the choice of working substance.
In modern models it is most often used isobutane, which refers to environmentally friendly but flammable gases. Older modifications could be equipped freon-134a, which is safe in terms of ignition, but has its own operating characteristics. You can determine the exact brand of gas by examining the technical sticker on the back wall of the case, where all system parameters are indicated.
Incorrect filling or use of the wrong refrigerant can lead to compressor failure and even fire hazard situation. That is why before starting any work it is necessary to accurately identify the substance. In this article, we will analyze in detail the differences between gases, their charging rates and the nuances that every owner needs to know.
Main types of refrigerants in Biryusa technology
Historically, the Biryusa plant, like many other manufacturers, switched to new types of refrigerants in accordance with international environmental standards. For a long time, R134a was considered the standard, which replaced the ozone-depleting freons. However, in the last 10-15 years, the main standard for household refrigerators has become isobutane (R600a).
This gas has excellent cooling performance and requires less substance for the system to operate efficiently. But it has one critical feature - it is explosive when in contact with air in a certain concentration. Therefore refrigeration circuitsworking on isobutane must be absolutely sealed, and repairs require compliance with strict safety measures.
⚠️ Attention: If there is a yellow triangle with a flame on the compressor of your refrigerator, this means that there is flammable gas inside the system. It is strictly prohibited to carry out welding or soldering without first burning and purging the system!
More rarely, mainly in industrial or very old models of the Soviet period, one could find R12, but for modern Biryusa household appliances this is no longer relevant. The main choice today is between R134a and R600a, and they cannot be confused, since they require different oils for the compressor and have different operating pressures.
How to determine the type freon in your refrigerator
The most reliable way to find out what your unit is filled with is to examine the factory markings. It is usually located on a metal plate or sticker on the back of the cabinet, or sometimes on the inside wall of the refrigerator compartment. This table shows the technical specifications, including the type and amount of refrigerant.
| Parameter | Where to look | Designation |
|---|---|---|
| Gas type | Rear sticker | R600a or R134a |
| Filling weight | Ibid | Gram (g) |
| Oil | In the instructions | POE or Mineral |
| Pressure | Service manual | Bar / PSI |
If the sticker is worn off or missing, you can focus on the type of compressor. Models with an external condenser (grid at the back) most often run on R134a, although this is not an absolute rule. Units with a foamed condenser (tubes inside the walls) and a small compressor are almost guaranteed to be filled with isobutane.
It is also worth paying attention to the production date. Equipment released after 2010 in the vast majority of cases uses R600a. Earlier models, especially large ones, were often equipped with under Freon-134asystems. The accuracy of the determination affects the cost and complexity of future repairs.
Is it possible to mix different types of freons?
Mixing different refrigerants, for example R600a and R134a, is strictly prohibited. This leads to a change in the thermodynamic properties of the mixture, increased pressure in the system and the risk of a compressor explosion. In addition, different oils used with these gases may not mix, forming plugs in the capillary tube.
Filling rates and amount of refrigerant
The amount of gas required for normal operation is strictly regulated by the manufacturer. For Biryusa refrigerators refueling rates vary depending on the volume of the chambers and the compressor model. Typically, household models with a volume of up to 300 liters require from 30 to 60 grams of isobutane.
Refilling the system “by eye” is unacceptable. Excess refrigerant will result in increased condensing pressure, compressor overload and possible pipe rupture. A lack of gas will cause insufficient cooling and overheating of the motor due to lack of vapor return. Accuracy to the gram is a key requirement.
☑️ Check before refueling
The filling process must be carried out using electronic scales. The technician weighs the cylinder before and after starting work, controlling the amount of gas released. An alternative method is refueling based on the compressor consumption current and suction temperature, but it requires high qualifications and experience working specifically with isobutane isobutane systems
Signs of a freon leak in the system
Understand that the gas has come out of systems, based on a number of indirect signs. First of all, this is the absence of cold in both chambers or only in the freezer, depending on the design. In this case, the compressor can work continuously without turning off, trying to gain temperature.
The second sign is a hot condenser (grid at the back). If the gas is gone, the compressor drives the void, and no heat exchange occurs, so the side walls or rear grille remain cold or barely warm. There may also be swelling of the inner wall of the refrigerator compartment or the appearance of yellow oily spots.
- 🔥 The compressor runs non-stop, but does not cool.
- ❄️ The ice is melting in the freezer, the food is defrosting.
- 👂 There is no characteristic gurgling or hissing during operation.
- 💧 The appearance of oil stains on the floor under the refrigerator.
If you notice such symptoms, most likely the circuit has depressurized. Finding a leak on your own without special equipment (leak detector) is almost impossible, especially if the tubes are sealed in polyurethane foam.
⚠️ Attention: Do not try to simply add gas to the system if there is a leak. This is a temporary measure that will cause the problem to break again in a few days or weeks. First, you need to find and eliminate the leak, and then vacuum the system.
Features of repairing isobutane systems
Repairing equipment running on R600a requires special care from the technician. As already mentioned, isobutane is heavier than air and, if leaked, accumulates in the lower part of the room, creating an explosive mixture. Therefore, all work related to breaking the seal (soldering, cutting pipes) must be carried out in a well-ventilated area.
Craftsmen use special tools that do not produce sparks, and often use the method of burning off gas residues before soldering. Biryusa refrigerators is characterized by a thin-walled design of evaporators, which are easily pierced by careless defrosting with a knife. Repair of such evaporators is often unprofitable and requires the installation of a mounted (“crying”) evaporator.
It is also important to use the right oil. For R600a and R134a, synthetic polyester oils (POE) are used, which are hygroscopic (absorb moisture). Therefore, the open time of the system should be minimal, and the evacuation should be of high quality and long.
The cost of refueling and the feasibility of repairs
The issue of price often becomes decisive when choosing between repair and purchase of a new unit. Refilling Biryusa refrigerator with freon consists of the cost of materials (gas, oil, filter) and the work of a specialist in finding leaks and soldering. On average, diagnostics and refilling can cost from 3 to 6 thousand rubles, depending on the region and the complexity of access to the nodes.
If a leak occurs in the foamed part (inside the walls of the case), repairs become difficult and expensive. The technician will have to either open the housing or (more often) turn off the damaged circuit and install an external evaporator. This affects the appearance and useful volume of the chamber.
In cases where the refrigerator is more than 10-12 years old and the compressor needs to be replaced along with refilling, it is more economical to consider purchasing new equipment. Modern models are more energy efficient and reliable. However, if the problem is only a clogged capillary tube or a small leak in an accessible place, the repair will extend the life of the unit by several years.
Frequently asked questions (FAQ)
Is it possible to fill the Biryusa refrigerator with freon from a car air conditioner?
Absolutely not. Car air conditioners use R134a freon, but with the addition of special oil additives, and it may be in a different mixture. In addition, refrigerators use different oils. Using the wrong refrigerant will damage the compressor.
How long should the compressor run after charging?
After proper charging and evacuation, the refrigerator should reach temperature within 1-2 hours (before the first shutdown). Complete freezing and temperature stabilization in all chambers take up to 24 hours.
Why did the refrigerator start to freeze after refueling, but after a week it stopped?
This is a classic sign that the leak has not been eliminated. The master simply added gas, but did not find the place where it was coming from. It is necessary to call a specialist again to search for the fistula using nitrogen or a leak detector.
Is it dangerous to breathe freon vapors from the refrigerator?
Freons R134a and R600a in small quantities are not toxic, but displace oxygen. Inhalation of large concentrations may cause suffocation, dizziness and arrhythmia. R600a is also explosive. In case of a strong leak, it is necessary to ventilate the room.