Faced with the fact that your Atlant refrigerator stopped freezing, many owners immediately start looking for information to restore the compressor's functionality. Most often, the problem lies not in a breakdown of the electronics, but in a banal leak of refrigerant from the circuit. Without the presence of gas in the system heat circulation it becomes impossible, and the products begin to deteriorate.
Restoring the freon level is a technically complex process that requires not only special equipment, but also an understanding of the physical processes occurring inside refrigeration unit. If you decide to carry out filling with freon on your own, you will need to carefully study the theoretical part and prepare the workplace.
It is immediately worth noting that simply “add gas” to the system, as is done with a car air conditioner, in In this case, it is impossible. Sealed circuit a household refrigerator requires complete evacuation before adding a new portion of refrigerant. Ignoring this rule will lead to the formation of ice jams and rapid failure of the compressor.
Leak diagnostics and equipment preparation
Before handling gas cylinders, you need to make sure that the leak has actually been eliminated. If there is a hole left in the system, the whole procedure will be in vain, and the freon will disappear in a matter of hours. It is almost impossible to visually find a microcrack in the foamed part of the body, so craftsmen often focus on the presence of oily stains near the tubes or use a leak detector.
For high-quality refilling, you will need to collect a whole arsenal of professional tools. It is pointless to start work without a pressure gauge station and a vacuum pump. It is also critically important to know what type of refrigerant was used in your model Atlant, since mixing different types of freon can destroy the compressor.
Usually the following set is required for refilling:
- ⚙️ Manometer station (manifold) with hoses of different colors.
- ⚙️ Vacuum pump to remove air and moisture.
- ⚙️ Electronic scales for accurate gas dosing.
- ⚙️ Cylinder with freon (R134a or R600a).
- ⚙️ Burner or soldering iron to seal the system.
⚠️ Attention: Freon R600a (isobutane) is explosive. Work with it must be carried out only in a well-ventilated area, excluding any sources of open flame or sparking.
The exact dosage of the refrigerant is a key parameter. A lack of gas will lead to poor cooling, and an excess will cause overload of the compressor and possible rupture of the tubes. The charge weight is always indicated on a special tag located inside of the refrigerator compartment or on the back wall of the unit.
Types of refrigerants in Atlant refrigerators
Modern models from the Belarusian manufacturer most often use freon R134a (tetrafluoroethane) or R600a (isobutane). These substances replaced the ozone-depleting R12, which was found in very old Soviet and post-Soviet models.
The difference between them is colossal. R134a operates at higher pressure and requires mineral or semi-synthetic oil. At the same time, R600a has excellent cooling performance with a small amount of substance, but requires the use of synthetic POE oil and compliance with fire safety measures.
| Parameter | R134a | R600a |
|---|---|---|
| System pressure | High | Low |
| Refill volume | 100-140 grams | 30-50 grams |
| Oil type | Mineral/Semi-synthetic | Synthetic (POE) |
| Safety | Safe, non-flammable | Explosive, flammable |
Never try to replace one type of freon with another without thoroughly upgrading the system. Compressor, designed for R600a, simply cannot work correctly with R134a due to the difference in oil viscosity and operating pressures.
Is it possible to fill a refrigerator with car freon?
Car freons often contain additives for lubricating air conditioning compressors that are incompatible with refrigeration compressor oil. The use of such mixtures can lead to the formation of acids inside the circuit and corrosion of the tubes from the inside.
The process of evacuating the system
After you have found and sealed the leak, and also replaced the filter-drier (this is a mandatory procedure in case of depressurization), it is necessary to remove all air and moisture vapor from the circuit. The air contains water vapor, which at low temperatures will freeze and clog the capillary tube.
Connect the vacuum pump to the service fitting (or to the process tube, if there is no fitting) using the yellow hose of the pressure gauge station. The blue hose (low pressure) is not used in this case, since we are working with a blind system. Turn on the pump and watch the pressure gauge needle.
The needle should go into the “green zone” of vacuum (usually this value is -1 atm or 0 MPa, depending on the scale). The pumping process should last at least 15-20 minutes for household models. This time is necessary so that the moisture contained in the oil and on the walls of the tubes has time to evaporate and be removed by the pump.
☑️ Vacuum checklist
Upon completion of pumping, without removing the hoses, it is necessary to clamp the filling copper tube with special a vise or a powerful clamp to maintain the vacuum inside the system. Only then can the pump be turned off. If you simply close the valve at the station, air can be sucked in through leaky connections.
⚠️ Attention: If, after turning off the pump, the pressure gauge needle begins to creep up, it means that there is still a leak in the system. Repeated evacuation will not help - look for a fresh leak.
Refrigerant charging technology
The most critical stage is the introduction of freon. There are two main methods: charging by weight and charging by current. For home craftsmen and owners Atlant refrigerators with a small chamber volume, the weighing method is the most accurate and safe.
Install the freon cylinder on the electronic scales. Record the container readings. Open the valve on the cylinder and let gas into the system. Since there is a vacuum inside, the freon itself will rush into the tubes. You need to let in strictly in doses, focusing on the readings of the scales.
As soon as you have entered approximately 80-90% of the nominal weight (indicated on the tag), you need to start compressor. To do this, connect the starter (if it is removed) or apply current directly, being careful. Let the engine run for 5-10 minutes so that the refrigerant is distributed throughout the system.
Refill the remaining 10-20% only with the compressor running. At this point, it is important to monitor the condition of the evaporator. It should become overgrown with frost evenly, starting from the freon inlet. If there is no frost, there is not enough gas; if the entrance to the compressor freezes, there is an overflow, which is dangerous.
Operation control and sealing
After collecting the required amount of freon and checking the operation of the system (the refrigerator should reach temperature, and there should be uniform frost on the evaporator), the moment of final sealing comes. With the compressor running, bend the filling tube in two places, moving away from the edge, and take a bite in the middle.
The resulting “tail” must be sealed with a torch. This must be done quickly and carefully so as not to overheat the tube and burn it. The solder should envelop the tube on all sides, providing a monolithic connection.
After soldering, be sure to check the seam for leaks. You can use a soap solution: apply foam to the seam and turn on the compressor. If bubbles do not appear, the work is done efficiently. If there are bubbles, the soldering procedure will have to be repeated.
The final touch is checking the pressure in the system. In normal operation of the Atlant refrigerator on R134a freon, the suction pressure should be close to atmospheric or slightly negative (vacuum), depending on the temperature in the chamber.
Common mistakes when refilling yourself
Beginners often neglect replacing the filter-drier, believing that “it will do just fine.” This is a fatal mistake. The old filter is already saturated with moisture and, when vacuumed, will begin to release it back into the system, which will lead to the formation of acid and blockage of the capillary.
Another common problem is the use of the wrong oil. If you charge the system with R600a and there is mineral oil left in the compressor from R134a, the lubrication will be insufficient. This will cause rapid wear of the friction pairs and jamming of the piston group.
It is also worth mentioning the error with the amount of gas. An attempt to fill the refrigerator “by eye”, without a scale, often ends with the unit working under overload. The compressor heats up, turns off by the thermostat, but the cold does not accumulate.
- ❌ Lack of evacuation (blowing with freon does not remove moisture).
- ❌ Using open fire near the R600a cylinder.
- ❌ Ignoring electronic readings scales.
- ❌ Attempt to refuel with the compressor running without pressure gauges.
⚠️ Attention: Characteristics and requirements for oils may vary depending on the specific modification of the compressor. Always check the technical documentation for the specific engine model installed in your refrigerator.
Self-refueling is a complex technical process that requires precision and accuracy. If you are not confident in your abilities or do not have the necessary equipment, it is better to contact a specialized service. However, having the necessary knowledge and tools, you can bring your Atlant refrigerator to life and save a significant amount on calling a technician.
How much freon is needed for an Atlant refrigerator?
The amount of refrigerant is strictly individual for each model and is indicated on the factory tag. Typically this ranges from 30 to 140 grams. The filling accuracy should be within ±5 grams.
Is it possible to charge a refrigerator without a vacuum pump?
Theoretically, you can blow the system with freon, displacing air, but this does not guarantee the removal of moisture. Moisture in the system is the main cause of breakdowns. Therefore, the use of a vacuum pump is a prerequisite for quality repairs.
Why does the refrigerator not freeze after refueling?
There may be several reasons: insufficient amount of freon, blockage of the capillary tube (often due to moisture or dirt), malfunction of the compressor or thermostat. It is also possible that the leak site was sealed poorly and the gas came out again.