When searching for information about what kind of gas is used in refrigerators Biryusa, owners often encounter confusion in technical data sheets and markings. This is no coincidence, because the KrasnoyarskHolodMash plant has been producing equipment for more than half a century, and during this time cooling technologies have changed dramatically. Old Soviet models used some substances, while modern energy-saving units used completely different ones, more environmentally friendly and efficient.
Understanding the type of refrigerant is critical not only for professional craftsmen, but also for users planning independent maintenance or troubleshooting. Incorrectly selected refrigerant can lead to compressor failure or even a system explosion. In this article we will examine in detail the evolution of gases in the Biryusa technique, methods for their identification and the nuances of safe operation.
The modern market offers many substitutes, but the manufacturer insists on using strictly defined brands of freon for each model. Ignoring these requirements reduces the service life of the equipment. Next, we will look at specific types of gases, their properties and features that are characteristic specifically of Russian-made refrigeration equipment.
The evolution of refrigerants in the Biryusa technique
The history of refrigerator production in Krasnoyarsk goes back decades, and during this time the chemical composition of the “blood” of the refrigeration machine has changed several times. Early models, produced during the Soviet period and in the early 90s, were most often refueled Freon R12. This substance had excellent refrigeration properties, but was recognized as destroying the ozone layer of the planet, which led to an international ban on its use.
During the transition period occurring in the late 90s and early 2000s, the plant began to introduce safer analogues. The most common was R134awhich is still found in many two-chamber models in the mid-price category. This gas is not flammable, but requires the use of synthetic oil, which makes the system more sensitive to moisture.
Modern lines, especially models with a system No Frost and a high energy efficiency class, have switched to hydrocarbon refrigerants, in particular R600a (isobutane). This substance has excellent cooling performance and is absolutely safe for the ozone layer, but it is explosive at a certain concentration in the air. That is why in the instructions for new Biryusa refrigerators you can find warnings about open fire and sparks.
Main types of freons: R134a and R600a
Today, Biryusa refrigerators are in operation, operating primarily on two types of refrigerant. The differences between them are fundamental and concern not only the chemical formula, but also the requirements for vacuuming, the type of oil and the filling method.
R134a (Tetrafluoroethane) is a colorless, odorless gas used as a replacement for R12. It is non-toxic and non-flammable under normal conditions. The pressure in the system with this gas is higher than that of R12, which requires more durable tubes and condensers. For compressors operating on R134a, it is necessary to use polyester oil, which actively absorbs moisture from the air.
⚠️ Attention: When working with R134a, you cannot use an open flame to solder tubes without first purging the system with inert gas, since at high temperatures this freon can decompose with the formation of toxic substances.
R600a (Isobutane) is a natural hydrocarbon gas that is becoming the standard for modern refrigerators. It has better solubility in oil and lower operating pressure, which allows for thinner tube walls and quieter compressors. However, isobutane is heavier than air and, if leaked, accumulates in the lower part of the room, forming an explosive mixture.
Why is R600a more dangerous than R134a?
Isobutane (R600a) is flammable gas. Unlike R134a, which is inert, a mixture of isobutane vapor and air explodes when triggered by a switch spark or static electricity. Therefore, the repair of such refrigerators requires strict adherence to safety precautions and ventilation of the room.
The table below shows a comparison of the main characteristics of these two refrigerants used in Biryusa refrigerators:
| Characteristics | R134a | R600a |
|---|---|---|
| Chemical name | Tetrafluoroethane | Isobutane |
| Flammability | Non-flammable | Flammable |
| Working pressure | High | Low |
| Oil type | Polyester (POE) | Mineral |
| Filling rate (g) | 100 – 140 | 30 – 60 |
How to determine the type of gas in your refrigerator
Before you begin any manipulations, you need to find out exactly what type freon is charged into your specific unit. The manufacturer does not rely on the user’s memory, but places all the necessary information on special nameplates (stickers). Ignoring this step can lead to a fatal mistake during repairs.
First of all, inspect the back wall of the refrigerator. There, next to the compressor, there is usually a metal or paper plate with a logo Biryusa and technical data. You are interested in the column “Refrigerant”, “Refrigerant” or “R-..”. This is where the type of gas, for example, R600a, and its quantity in grams will be indicated.
If the sticker on the back wall is missing, damaged or unreadable, look for duplicate information. In some models (especially built-in ones), the nameplate may be located inside the refrigerator compartment: on the side wall, on a shelf or on the door. Also, the type of gas is often indicated in the operating instructions that came with the device.
☑️ Checking information about the refrigerant
Although compressors for R600a are often (but not always) smaller in size and have a characteristic “barrel” shape, you cannot rely on visual inspection alone. The only reliable source is the manufacturer's marking.
Signs of a leak and the need for refilling
A refrigerator is a sealed system, and in good condition, gas should not leak from it for years. However, mechanical damage, corrosion or manufacturing defects can lead to depressurization. Understanding the symptoms of a leak will help you contact a specialist in time and save the products.
The very first and obvious sign is an increase in temperature in the chambers. If you notice that food has begun to deteriorate faster, and the temperature indicator in the refrigerator compartment has stopped lighting (or it shows above normal), this is an alarming signal. In this case, ice may melt in the freezer, or, conversely, food will begin to thaw.
The second sign is the operation of the compressor. If there is a freon leak, the unit tries to compensate for the lack of cold by working without interruption. You may notice that compressor it hums constantly, without going to rest, or, conversely, it turns on for a short time and turns off, as the thermal overheating protection relay is triggered. In both cases, the equipment does not have time to reach the desired temperature.
⚠️ Attention: If you smell a specific odor (although freon itself is often odorless, the carrier oil or insulation combustion products may smell), immediately ventilate the room. Do not try to look for a leak using an open flame!
Sometimes a leak is accompanied by visible signs: oily stains on the floor under the refrigerator or on the pipes in the back. Since freon circulates in the system along with oil, the release of gas is often accompanied by the release of an oil emulsion. Detection of such spots is practically a guarantee that the circuit is depressurized.
Features of refueling and technical nuances
The process of refilling the Biryusa refrigerator is a complex technical procedure that requires specialized equipment. Unlike refilling air conditioners, where volume is important, in refrigerators the weight of the refrigerant is critical. An error of even 5-10 grams can lead to incorrect operation of the entire system.
Electronic scales with an accuracy of up to 1 gram are used for refilling. The technician must know the exact filling rate for your model, which is indicated on the nameplate. Before introducing new gas, the system must be evacuated. This is necessary to remove air and moisture, which, once inside, can cause the formation of ice plugs or acids that destroy the metal.
Particular attention should be paid to the type of oil. R134a uses synthetic polyester oil, which is hygroscopic (absorbs moisture). For R600a, mineral oil is more often used. Mixing different types of oils or using the wrong freon will lead to rapid failure of the compressor. In addition, when working with R600a, do not smoke or use tools that produce a spark.
The refueling process includes several stages:
- 🛠️ Removing the old compressor (if required) or preparing the system.
- 💨 Purging the circuit with nitrogen to clear products combustion and debris.
- 🌪️ Deep vacuuming of the system for 30-60 minutes.
- ⚖️ Refilling a strictly weighed amount of refrigerant through the service patrol.
- 🔥 Sealing (sealing) the pipe and checking systems for leaks.
Common mistakes during self-repair
The desire to save on the services of a specialist often leads to even greater expenses. Owners of Biryusa refrigerators, trying to fix a leak or replace freon on their own, make a number of typical mistakes that make further professional repairs impossible or economically unfeasible.
One of the most common mistakes is the use of car kits for refilling air conditioners. The pressure and types of refrigerants in automobile climate systems and household refrigerators differ. Trying to pump in the wrong gas or using the wrong fitting can damage the compressor valves.
Another mistake is ignoring the need to replace the filter drier. Any depressurization of the system causes moisture to enter. The filter drier, which is located at the entrance to the capillary tube, is already saturated with moisture at this point and will not be able to work effectively. If it is not replaced when refueling, the moisture will freeze in the capillary, forming an ice plug, and the refrigerator will stop cooling after a few hours of operation.
⚠️ Attention: Specifications and maintenance requirements may vary depending on the specific modification of the refrigerator. Always check the manufacturer's official technical documentation for your model before starting work.
FAQ: Frequently Asked Questions
Is it possible to replace R134a with R600a in the Biryusa refrigerator?
Theoretically, this is possible, but requires a complete rework of the system: replacing the compressor, purging the circuit, changing the oil and filter drier. A simple replacement of gas without deep modification will lead to a fire or explosion, since the oils and system components are not designed to work with flammable gas.
Why does the Biryusa refrigerator not freeze after refueling?
There may be several reasons: incorrect amount of freon charged (underfilling or overfilling), the presence of an air lock, a malfunction of the thermostat or clogged capillary. It is also possible that moisture got into the system during refueling, causing an ice jam.
Is R600a gas dangerous for human health?
Isobutane (R600a) itself is not toxic in small concentrations, but it displaces oxygen. The main danger is explosion. In the amount contained in one refrigerator (about 50 grams), an explosion in a closed room can destroy windows or doors, but this is not enough to poison the air in the apartment.
How often do you need to change freon in a refrigerator?
Freon is not a consumable material. In a sealed system, it circulates for decades without replacement. If the gas has disappeared somewhere, then there is a leak in the system that needs to be found and fixed. You can’t just “add” freon - this is a temporary measure that will quickly stop working.