What freon is used to fill Biryusa refrigerators

Modern refrigeration units, including the popular brand Biryusa, operate thanks to the circulation of refrigerant in a closed circuit. Freon is a key working fluid, the properties of which determine the cooling efficiency and safety of operation. Owners are often faced with the need to find out the type of gas during repairs or routine maintenance of equipment.

The production of refrigerators Biryusa was carried out in different decades, which determines the use of different types of refrigerants depending on the year of manufacture of the model. Old Soviet units and modern energy-efficient versions can differ radically in the chemical compounds used. Understanding these differences is critical for proper maintenance.

In this article we will look in detail at what kind of freon used in various series of Biryusa refrigerators. We will look at the technical characteristics, refueling standards and features of working with each type of gas so that you can competently approach the issue of repair or diagnostics.

The evolution of refrigerants in the Biryusa technique

The history of the production of Biryusa refrigerators goes back several decades, and during this time the industry has moved on from the use of flammable and toxic substances to environmentally friendly mixtures. At the beginning of production, especially in models of the Soviet period, the standard was R-12 (difluorodichloromethane). This gas had excellent refrigeration properties, but was recognized as depleting the ozone layer.

Over time, under pressure from international environmental agreements, the manufacturer switched to safer analogues. In models released in the 90s and early 2000s, you can often find R-134a. This refrigerant does not destroy the ozone layer, but has a higher global warming potential compared to the latest analogues.

Modern lines of Biryusa refrigerators, focused on a high energy efficiency class, are most often filled with isobutane R-600a. This is a substance of natural origin that has excellent cooling performance with a minimum amount of substance in the system. The transition to new types of gases required changes in the design of compressors and piping systems.

⚠️ Attention: Never try to determine the type of freon only by the appearance of the cylinder or hoses of the technician. Old stock R-12 and new stock R-600a may look the same, but mixing or replacing them without flushing the system will result in compressor failure.

It is important to understand that the transition to new types of refrigerants was accompanied by changing requirements for tightness the system. While R-12 was relatively forgiving to microscopic leaks, modern gases require perfect welding of joints. This directly affects the durability of the refrigerator during operation.

Main types of freon: characteristics and differences

For proper maintenance, it is necessary to clearly distinguish the physical and chemical properties of the substances used. Each type of freon has its own characteristics, which dictate the method of refilling and diagnosing faults.

• 🧊 R-12 (Freon-12): Used in old Biryusa models. Colorless gas with a faint odor of ether. Heavier than air, does not burn, but upon contact with an open flame it decomposes to form toxic phosgene. Requires the use of mineral oils.
• ❄️ R-134a (Tetrafluoroethane): Direct analogue of R-12 in terms of temperature characteristics, but more environmentally friendly. It is colorless and odorless. Works with synthetic polyester oils. The pressure in the system is higher than that of R-12, which requires more durable tubing.
• 🔥 R-600a (Isobutane): Natural hydrocarbon gas. Has high energy efficiency. The main feature is high flammability. Concentrations in air between 1.3% and 8.5% are explosive. Refilling requires special care and the absence of sparks.

The differences concern not only safety, but also compatibility with materials. For example, the rubber and plastics used in older R-12 systems can be degraded by the synthetic oils required for R-134a. Therefore, when converting the system, a complete replacement of components is required.

When choosing a repair method, the technician must take into account the type of gas. For R-600a there are strict restrictions on the amount of charge, since an increase in the mass of gas in a closed volume increases the risk of ignition. At the same time, R-134a is more stable, but sensitive to the presence of moisture in the system.

How to determine the type of freon in your refrigerator

The most reliable way to find out whether your Biryusa refrigerator is charged is by studying the technical documentation. However, if the passport is lost, there are other identification methods that allow you to accurately determine the type of refrigerant. what kind of freon your Biryusa refrigerator is refilled - this is a study of technical documentation. However, if the passport is lost, there are other identification methods that can accurately determine the type of refrigerant.

First of all, pay attention to the compressor. The motor housing often has a sticker or metal plate with technical information. Look for the inscription Type of refrigerant or Gas. The exact type of gas will be indicated there, for example R600a or R134a, as well as the recommended amount in grams.

If the sticker on the compressor is unreadable or missing, you can indirectly determine the type of gas by the year of manufacture of the model:

• 📅 Before 1995-1998: With a probability of 99% it is used R-12. This is the era of mass production of classic two-chamber refrigerators with tubular evaporators.
• 📅 1998-2010: Transition period. There are both R-12 (at the beginning of the period) and R-134a. Biryusa models of this period were often equipped with Danfoss or Atlant compressors.
• 📅 After 2010: The vast majority of models were transferred to R-600a. This is due to stricter environmental regulations and the desire to reduce energy consumption.

⚠️ Warning: Do not attempt to pierce the pipeline to “test” gas unless you have the appropriate equipment and skills. In the case of R-600a, this can lead to a fire, and in the case of any freon, to the entry of moisture and air, which will damage the system.

Also, the type of refrigerant is often indicated on service sticker, which can be located on the inner wall of the refrigerator compartment, on the door or on the back wall of the case. Look for a table with parameters where, along with voltage and current frequency, the refrigerant will be indicated.

Table of correspondence of models and types of refrigerant

For ease of systematization of data, we have prepared a summary table. It will help you navigate depending on the series and production period. Remember that during transition periods the plant could use different components.

The table shows that modern models have almost completely switched to isobutane. This imposes its own requirements for repairs: for example, soldering of pipes in a system with R-600a is often carried out without opening the circuit, using special burners with gas suction, or the pipe method is used. press-fitting tubes

Refilling rates also vary significantly. If R-12 required about 150-200 grams of gas, then R-600a in a refrigerator of similar volume will require only 50-60 grams. Dosing accuracy is critical here: excess gas will lead to increased pressure and load on the compressor, and too little will lead to insufficient cooling.

Why can’t you mix oils?

Mixing mineral and synthetic oils leads to the formation of a dense sediment (slag), which clogs the capillary tube and filter drier. This causes a sharp drop in performance and overheating of the compressor.

Leakage symptoms and the need for refilling

The refrigerator is a sealed system, and under normal conditions freon is not consumed. If your unit requires refilling, it means that the circuit has depressurized. Ignoring this fact can lead to the burning of an expensive compressor.

The main signs of a refrigerant leak are:

• 🌡️ Weak cooling: The food in the refrigerator compartment is warm, and in the freezer only a thin crust of ice forms or it completely thawed.
• 🔊 Constant operation of the compressor: The engine hums non-stop, trying to gain temperature, but does not turn off.
• 💧 Lack of heat on the condenser: The side walls or rear grille remain cold, although the compressor is hot.

It is important to note that simply adding gas (“throw in freon”) is a temporary measure that rarely solves the problem for a long time. If there is a leak, it won't go away. Moreover, along with the gas, the oil necessary to lubricate the rubbing parts of the compressor leaves the system.

The process of restoring functionality should include finding the location of the leak (often a foamed evaporator or a pipe joint), eliminating it, replacing filter-drier and evacuating the system before filling with a new portion of freon.

Replacement technology and safety measures

Replacing freon in a Biryusa refrigerator is a complex technological process that requires special equipment: a pressure gauge station, a vacuum pump, scales and a burner. Self-refueling without experience often leads to equipment damage.

The process usually looks like this. First, the technician bleeds off the remaining old gas (if it still exists). The system is then sealed and pressurized with high-pressure nitrogen to search for fistulas. After eliminating the defects, air and moisture are removed from the circuit within 15-30 minutes. vacuuming - removing air and moisture from the circuit for 15-30 minutes.

⚠️ Attention: Filling the refrigerator by eye, without weighing the exact amount of gas, is unacceptable. Especially for R-600a, where an error of 10-15 grams can be more than 20% of the norm, which is critical for operation.

Particular attention is paid to safety when working with R-600a. All work must be carried out in a well-ventilated area. It is prohibited to smoke or use open flames or spark-producing power tools near the work site. Isobutane cylinders are stored away from heating devices.

After refueling and starting the refrigerator, it is necessary to control the compressor current consumption and the temperature in different parts of the circuit. This allows you to make sure that cooling capacity has been completely restored and the system is operating normally.

Frequently asked questions (FAQ)

Is it possible to fill a Biryusa refrigerator with another type of freon if the original one has run out?

It is absolutely not possible. Each type of freon requires oil and has different operating pressures and boiling points. Replacing R-12 with R-134a is only possible with a complete flush of the system, changing the oil and filter, but this is a complex conversion procedure. It is impossible to replace R-134a with R-600a or vice versa without replacing the compressor and evaporator.

How much freon is needed to refill the Biryusa refrigerator?

The exact amount depends on the model and volume of the chambers. For older models with R-12, the norm was 140-200 grams. For modern models with R-600a, the norm is usually in the range of 50-70 grams. The exact number is always indicated on the compressor nameplate or service sticker.

Why does the refrigerator work worse after refueling?

Possible reasons: violation of vacuum technology (moisture or air remains), incorrect dosage of freon (underfilling or overfilling), use of low-quality gas or capillary tube debris with poor quality repair.

Is it dangerous to breathe freon vapors from an old refrigerator?

Short-term inhalation of small concentrations usually does not cause serious consequences, but can lead to dizziness or nausea. However, R-12 releases toxic phosgene when heated. R-600a is explosive. Therefore, any work to bleed gas must be carried out outdoors or with strong ventilation.