Owners of refrigeration equipment often face a situation when equipment stops cooling food, and the first suspicion is a refrigerant leak. The question of what kind of gas refrigerators are filled with Indesitbecomes critically important when planning repairs, since the use of the wrong substance may not only not solve the problem, but also permanently damage the compressor. Unlike old Soviet models, modern units use different types of gases, depending on the year of manufacture and the specific series of the device.
The modern line of the brand Indesit, like most European manufacturers, has long switched to environmentally friendly standards, abandoning compounds that destroy the ozone layer. Understanding exactly which one refrigerant is used in your model is necessary not only for the master, but also for the owner, in order to avoid unfair service and overpayment for materials. In this article we will analyze in detail all aspects related to the types of gases, their features and the replacement procedure.
The main types of refrigerants in Indesit technology
The history of the development of the company's refrigeration equipment Indesit counts back several decades, and for this Over time, the chemical composition of the working fluid in the system changed dramatically. Early models produced before the mid-2000s often ran on R134a freon. It is a single-component gas that has become the standard replacement for the banned R12. It is non-flammable, has good cooling performance and is relatively easy to handle, although it requires the use of synthetic oils that are sensitive to moisture.
More modern models, especially those that meet the high energy efficiency classes A+ and above, are often charged with mixed refrigerants such as R600a (isobutane). This gas is a natural hydrocarbon; it has excellent thermodynamic properties, but requires special care during installation due to its flammability. Concentration The gas in the system must be strictly dosed, since even a slight deviation from the norm can lead to unstable operation of the compressor or increased noise.
There are also a small number of industrial or specific models that can use mixtures based on R407c or analogues, however, for the household segment Indesit the use of the two above-mentioned types is typical. It is important to understand that mixing different types of freons strictly prohibited. If the system initially contained R134a, then refilling R600a is impossible without completely reworking the system and changing the oil, since the chemical properties of these substances are incompatible.
⚠️ Attention: Freon R600a is explosive at a concentration in air from 1.3% to 8.2%. Evacuation and refilling of refrigerators with this gas can only be carried out in well-ventilated areas and with a spark-proof tool.
How to determine the type of freon in your refrigerator
The most reliable way to find out what gas is used in your unit is to search for technical information on the device itself. Manufacturers are required to apply labeling that contains comprehensive information about the refrigerant and the amount of oil. Typically this information is located on a metal or plastic plate attached to the back wall of the refrigerator compartment or at the end of the door. In some cases, the sticker may be located inside, on the side wall.
When examining the label, pay attention to the “Refrigerant” or “Refrigerant” column. There will be a designation indicated, for example, R134a or R600a. Next to the type of gas, its quantity in grams is always indicated. This is a critically important parameter, since isobutane requires significantly less substance (usually 30-50 grams) than tetrafluoroethane (about 100-140 grams). An error in dosage will lead to the refrigerator working with overload or not being able to reach the temperature at all.
If the plate is erased, missing or damaged, it is impossible to determine the type of freon visually. In such cases, technicians resort to analyzing the type of compressor and system design. For example, compressors running on R600a often have a smaller cylinder volume and may be painted black, while R134a has different design features. However, you cannot rely only on the appearance of the unit - the only correct method in case of loss of the nameplate is consultation with official service centers by serial number.
Comparative table of refrigerant characteristics
For a deep understanding of the differences between those used in technology Indesit gases, consider their physical and operational properties. This data helps explain why some models are quieter while others require more maintenance. Differences in pressure, boiling point and compatibility with oils dictate the repair technology.
| Parameter | R134a (Tetrafluoroethane) | R600a (Isobutane) |
|---|---|---|
| Chemical formula | CH2FCF3 | C4H10 |
| Boiling point | -26.1 °C | -11.5 °C |
| System pressure | High | Low (close to atmospheric) |
| Oil type | Synthetic (POE) | Mineral |
| Safety | Non-flammable, non-toxic | Explosive, flammable |
As can be seen from the table, R600a operates at lower pressure, which reduces the load on the walls of the tubes and allows them to be made thinner, and also reduces noise during system operation. However, its flammability requires the master to use specialized equipment for gas sampling and soldering. At the same time, R134a requires maintaining absolute dryness in the system, since synthetic oil is hygroscopic and, when exposed to moisture, forms an acid that corrodes parts.
Why can’t you mix oils?
Synthetic oils (POE) for R134a and mineral oils for R600a have different chemical structures. When mixed, they form an insoluble precipitate, which clogs the capillary tube and disables the compressor in a matter of hours.
Signs of leakage and the need for refueling
The sealed circuit of the refrigerator Indesit is designed for the entire service life of the device, but mechanical damage, corrosion or factory defects can lead to depressurization. The first and most obvious sign of a leak is a stoppage of cooling or a significant decrease in operating efficiency. The compressor may run continuously without shutting down, trying to reach the set temperature, but the heat exchanger on the rear wall will remain cold.
It is important to distinguish a freon leak from other faults, such as a broken thermostat or a clogged capillary system. If you notice oily stains on the floor under the refrigerator or at the junction of the pipes, this is a sure sign that gas is escaping from the system along with the gas. In the case of R600a, a leak can sometimes be detected by the characteristic smell of gas (although in household quantities it often evaporates quickly), but you should not rely on your sense of smell because of the health risks. compressor oil. In the case of R600a, a leak can sometimes be detected by the characteristic smell of gas (although in household quantities it often evaporates quickly), but relying on the sense of smell is not worth it due to the health risks.
⚠️ Attention: Independent search for a leak using a soap solution is only possible when the refrigerator is unplugged. Never try to find a leak using an open flame or sparking devices, especially if you suspect the use of isobutane.
Another sign may be swelling of the inner or outer wall of the refrigeration chamber, which often occurs when moisture that has entered the system through a microcrack freezes. If the refrigerator stops freezing after defrosting or moving it, the likelihood of a leak is high. In such cases, simple refueling without finding and eliminating the gas outlet does not make sense - the gas will leave again after a short time.
Technology for replacing and refueling the refrigerator
The process of refueling the refrigerator Indesit is a complex technical procedure that requires professional equipment and qualifications. It is not limited to simply connecting a gas cylinder. The first step is always to find and fix the leak. The technician pressurizes the system with high-pressure nitrogen to find the location of the damage. After eliminating the defect, vacuuming is performed.
Vacuuming is necessary to remove air and, more importantly, moisture from the system. Residual moisture in a system with R134a will lead to the formation of an ice plug in the capillary and corrosion, and in a system with R600a it will lead to increased pressure and the risk of explosion. The process takes from 15 to 30 minutes and is carried out by a powerful vacuum pump. Only after reaching a deep vacuum is the refrigerant charged.
☑️ Stages of professional charging
Refilling is carried out strictly by weight, using electronic scales. The amount of gas is indicated by the manufacturer on the nameplate (for example, 45 grams). Charging “by eye” or by pressure in the system for household refrigerators is unacceptable, since the pressure depends on the ambient temperature and is not an accurate indicator of the amount of refrigerant. After refueling, the system is sealed, sealed, and a test launch is performed.
Cost of work and choice of technician
The price of refueling a refrigerator Indesit consists of the cost of the gas itself, consumables (solder, nitrogen, filter-drier) and the work of the technician. Since R600a is cheaper to produce but requires more complex safety measures, the cost of working with it may be higher due to the risks. Also, the cost depends on the complexity of access to the circuit: if it is necessary to open the foamed part of the case, the price increases significantly.
When choosing a contractor, it is important to pay attention not only to the price, but also to the availability of equipment. The technician must have a pressure gauge manifold, a vacuum pump, electronic scales and a leak detector. The absence of any of these tools compromises the quality of the repair. Cheap refilling “from a cylinder” without evacuation and replacement of the filter-drier is a waste of money, which will lead to repeated breakdowns.
It is also worth considering that if your refrigerator is more than 10-12 years, and there is a leak in the foamed part (evaporator inside the housing), repair may not be economically feasible. In such cases, the cost of restoring tightness and refilling can be up to 70% of the cost of a new device. In such a situation, it is more advisable to consider purchasing new equipment rather than revive the old one.
Is it possible to refill the refrigerator yourself?
Theoretically, it is possible if you have access to equipment and the skills to solder copper pipes. However, for R600a this is extremely dangerous due to the risk of explosion. R134a requires accurate gas weighing. Without experience, there is a high probability of damaging the compressor or not achieving the desired temperature.
How often do you need to change freon in the refrigerator?
Freon is not a consumable item and does not require scheduled replacement. In a working, sealed refrigerator, it circulates for decades. Replacement is required only in case of a leak or after repair of the compressor.
Is it dangerous to breathe freon vapors?
In small quantities that can be released when a household refrigerator is depressurized, R134a and R600a freons are not toxic. However, R600a displaces oxygen and can cause asphyxiation in confined spaces and may explode if concentrated. R134a, when heated, can decompose into toxic substances.
Why does the refrigerator hum after refueling?
Humming can be caused by several reasons: air entering the system (poor evacuation), excess freon (water hammer) or a malfunction of the compressor itself. If the noise appears immediately after the repair, you need to contact a specialist to check the pressure.
Is it possible to mix R134a and R600a?
Absolutely not. These refrigerants require different types of oils and have different operating pressures. Mixing will lead to a chemical reaction, the formation of acids and sediment, which is guaranteed to damage the refrigerator.