Owners of household appliances are often faced with a situation where the refrigerator stops freezing properly, and the first suspicion is a refrigerant leak. The question of how much freon should be in the refrigerator Pozisis one of the most common when contacting specialists, but there is no definite answer for all models. The amount of refrigerant is strictly individual for each specific unit and depends on the volume of the chambers, the power of the compressor and the type of gas used.
Modern Russian refrigerators Pozis, produced at the plant in Zelenodolsk, use different types of refrigerants, which directly affects the mass of the substance in the system. In older models and some budget series you can still find R134a, while new energy-efficient modifications are being massively converted to environmentally friendly isobutane (R600a). The difference in their density and performance characteristics dictates completely different filling standards, ignoring which can lead to compressor failure.
Understanding the exact volume of gas is necessary not only for diagnostics, but also for estimating the cost of repairs, since the price of the service is often based on the amount of material spent. In this article, we will look in detail at how to determine the type of freon in your unit, what factory standards exist for different series, and why independent refueling without professional equipment is impossible.
Types of refrigerants used in Pozis refrigerators
Manufacturer Pozis over many years of production, has changed several technological standards, adapting to international environmental standards. Today, there are models in use that operate primarily on two types of gases, each of which has its own physical and chemical properties and safety requirements.
The most common in modern models, such as Pozis RK-139 or RK-168, is isobutane (R600a). This substance belongs to the class of hydrocarbons, it does not destroy the ozone layer and has excellent cooling performance with less energy consumption. However, R600a is a flammable gas, which imposes special requirements on the tightness of the system and the quality of soldering of tubes during repairs.
Older models, as well as some large-sized two-compressor options, can be filled with tetrafluoroethane (R134a). This freon is non-flammable, but requires higher system pressure to operate effectively. It is impossible to distinguish them visually by the color of the gas, but can be determined by the markings on the compressor or technical plate.
⚠️ Attention: Never mix different types of freon. If the system had R134a, and you fill it with R600a (or vice versa), the compressor will fail almost instantly due to incompatibility of oils and different operating pressures.
Accurately determining the type of refrigerant is the first step before any intervention in the system. Usually this information is duplicated on a sticker located inside the refrigerator compartment or on the back wall of the unit.
Factors influencing the amount of freon in the system
There is no single figure indicating how many grams of freon are needed for any refrigerator Posis. The filling volume varies widely - from 30 to 140 grams, and depends on many design features.
First of all, the amount of refrigerant directly correlates with volume of refrigeration and freezer compartments. The larger the internal volume, the longer the evaporator and condenser lines, and therefore the more gas required to fill the circuit. Single-chamber models require a minimum quantity, while three-chamber units with a freshness zone require maximum charging.
The second important factor is the design of the heat exchange circuit. In No Frost systems, which are being actively introduced into the product lines Pozis, the gas passes through a more complex path through an evaporator hidden behind a plastic panel. This requires a more accurate dosage, since an error of 10-15 grams can lead to either insufficient cooling or water hammer in the compressor.
The mass is also affected by the ambient temperature (ambient temperature) for which the refrigerant is designed and the length of the capillary tube. Engineers calculate charging so that when exiting the freezing mode, there is no liquid phase left in the tube, which is dangerous for the piston group.
Filling standards for popular Pozis models
Although the exact data is always indicated in the product data sheet, in practice, craftsmen rely on average factory values for specific series. Below is a table showing the dependence of the mass of refrigerant on the model and type of gas.
| Refrigerator model | Refrigerant type | Filling volume (grams) | Note |
|---|---|---|---|
| Pozis RK-102 | R134a | 115 ± 5 | Single compressor model |
| Pozis RK-139 | R600a | 52 ± 2 | Energy efficient class A+ |
| Pozis RK-168 | R600a | 58 ± 2 | Full No Frost system |
| Pozis RK-149 | R134a | 130 ± 5 | Increased chamber volume |
| Pozis Sviyaga | R600a | 45 ± 2 | Compact series |
Please note that even within the same series, the norm may differ. For example, refrigerators with a “crying” defrosting system and units with a system No Frost of the same height will have different filling weights due to different circuit lengths.
For models with two compressors (a separate circuit for the refrigeration and freezing chambers), norma is summed up, but refilling is done separately into each circuit through different technological pipes An error in determining which circuit to pour how much into is fatal to the equipment.
Why are scales more important than a pressure gauge?
When filling with isobutane (R600a), the pressure gauge shows the pressure, which strongly depends on the room temperature. Therefore, accurate filling is only possible using scales with 1 gram increments. Dosage “by eye” or only by pressure for R600a is unacceptable.
How to find out the exact amount of freon for your model
If you want to find out exactly how many grams of freon your unit requires, you should not rely on memory or advice from neighbors. The most reliable source of information is the technical documentation that accompanies each appliance.
Find it on the refrigerator body service sticker. It is usually located inside the refrigerator compartment on the side wall, on the door or on the rear metal panel on the outside. This label contains all the necessary information: model, serial number, type of refrigerant and, most importantly, the charge weight.
Look for the line labeled "Refrigerant" or "Refrigerant". Next to the type of gas (for example, R600a) the weight in grams is always indicated (for example, 52g). If the sticker is worn out or missing, information can be found in the operating instructions in the "Technical Specifications" section.
- 🔍 Carefully inspect the inside surface of the refrigerator door - this is the normal place for the sticker.
- 📸 Take a photo of the sticker on your phone so that the data is always at hand when ordering spare parts or making a call technician.
- 📄 If there is no sticker, find the compressor model (on the black tank at the back) and check its passport data on the Internet.
If all documents are lost and the markings are erased, only a qualified technician can determine the exact volume after completely evacuating the system and weighing the filling according to the technological map for this type compressor.
Signs of freon leakage and the need for refilling
Freon is an inert gas that circulates in a closed circuit and is not consumed during operation. If the refrigerator stops freezing, in 90% of cases this means a violation of the tightness of the system, that is, a leak.
Symptoms of a lack of refrigerant appear gradually. At first, you may notice that the refrigerator Posis works longer than usual without turning off. The compressor hums continuously, trying to reach the set temperature, but cannot do this.
Then the quality of freezing begins to suffer. In the freezer compartment, food thaws, ice appears only at the entrance to the chamber or in one corner, and in the refrigerator compartment the temperature rises above +10°C, which is why food quickly deteriorates.
⚠️ Attention: If you see that the compressor is hot, but the condenser grille at the back is only partially warm (or completely cold), this is a sure sign that freon has left the system. You cannot operate the equipment in this mode - the compressor will burn out from overheating.
Sometimes a leak can be detected visually: oily stains may be visible on the evaporator tubes inside the chamber (if you remove the plastic panel). Freon circulates along with the oil, so where the gas has left, a trace of oil often remains.
Refilling process and safety measures
Filling a refrigerator Pozis with freon is a complex technological process that cannot be performed efficiently at home without special tools. It requires not just “add gas”, but a series of preparatory operations.
First, the technician must find and eliminate the leak. Simply putting new Freon into a leaky system is a waste of money as the gas will leak again within a few days or weeks. After soldering, the system must be vacuumized with a special pump to remove moisture and air.
☑️ Stages of professional refueling
Only after creating a deep vacuum, filling is carried out. The amount of freon is measured on electronic scales accurate to the nearest gram. For R600a, this is critically important, since this gas is explosive at a concentration in air of more than 1.3%.
After refueling, the pressure in the system, the current consumption of the compressor and the temperature in the chambers are checked. Only a comprehensive check guarantees that the refrigerator Pozis will work correctly and economically.
Frequently asked questions (FAQ)
Is it possible to fill a Pozis refrigerator with freon yourself?
Theoretically, it is possible if you have a license to work with freons, a pressure gauge station, scales and a vacuum pump. However, for a household user this is not economically feasible and dangerous. The cost of the equipment will exceed the cost of calling a technician, and the risk of an explosion (when working with R600a) or damage to the compressor is very high.
How often do you need to change or add freon in the refrigerator?
In a working refrigerator, freon never does not need to be changed or added. This is a closed system. If the gas has disappeared somewhere, it means a hole has formed (microcrack, corrosion, evaporator breakdown). Simply “add” freon is a temporary solution, the problem will return in a week or a month.
Why do different sources have different amounts of freon for one model?
The manufacturer Pozis can change the equipment and suppliers of compressors in different years of production of the same and the same model. For example, in 2015 a model could come with R134a and 120 grams, and in 2020 the same model began to be equipped with R600a and 55 grams. Always rely on the sticker on your specific unit.
What will happen if you fill in more freon than specified in the norm?
Overfilling is more dangerous than underloading. Excess liquid freon can enter the compressor, causing water hammer and mechanical destruction of the valves. In addition, the pressure in the system will increase, electricity consumption will increase, and the refrigerator will freeze worse due to impaired heat transfer.