Owners of household appliances are often faced with a situation when the refrigerator stops freezing or starts working intermittently. One of the most common causes of such malfunctions is leakage refrigerant. The question of how much freon is needed for an Atlant refrigerator becomes critically important for those who are planning independent repairs or want to supervise the work of a technician. Without an accurate understanding of the charging standards, it is impossible to restore the functionality of the unit.
The amount of refrigerant is not an arbitrary number, but a strictly calculated engineering parameter. Different models of the Belarusian manufacturer can use different types of gases, such as R134a or isobutane R600a. An error in dosage of even a few grams can lead to compressor failure or insufficient cooling of the chambers. This is why it is important to understand the specifications of your device.
In this article we will look in detail at how to determine the required volume of gas, where to look for technical information and why refueling yourself without equipment is a risky step. You will learn about the differences between models and understand how to correctly diagnose a problem with the refrigerant, so as not to spend extra money on unnecessary services from service centers.
Factors influencing the volume of refilling
The volume of required refrigerant directly depends on the design features of a particular model. Refrigerators Atlant have been produced for several decades, and during this time technology has changed significantly. Older two-chamber models with one compressor and system No Frost require more gas than compact single-chamber devices. The number of cooling circuits is also important: in some units, freon circulates only in the freezer, in others - around the entire perimeter.
The type of refrigerant used also dictates its conditions. Modern models are increasingly switching to isobutane R600a, which has excellent cooling performance, but requires high precision when filling. The explosiveness of this gas makes working with it more difficult compared to traditional R134a. The pressure in the system and the charge mass for these substances will be radically different.
⚠️ Attention: Never try to determine the amount of freon “by eye” or by analogy with other refrigerators. Excess gas will cause water hammer and destruction of the compressor, and too little will lead to overheating of the motor.
It is important to take into account the geometry of the pipelines. The length of the capillary tube and the diameter of the evaporator affect the overall pressure in the system. If you are changing a compressor or evaporator, the standard standards may not be suitable, and you will need to adjust the amount of refrigerant depending on the readings pressure gauge during operation.
Why can’t you mix different types of freon?
Mixing refrigerants such as R134a and R600a are strictly prohibited. They have different chemical structures and require different types of compressor oils. The mixture can form aggressive compounds that destroy the internal walls of the tubes, or become explosive. In addition, the mixture will have unpredictable thermodynamic properties, which will lead to compressor failure in the shortest possible time.
Where to find accurate information about the amount of freon
The most reliable way to find out how many grams of freon is needed for your Atlant refrigerator is to refer to the technical documentation. Manufacturers are required to provide this information as it is key to safe operation. Usually the data is located on a special sticker or metal nameplate that is attached to the case.
You should look for the information plate in the following places:
- 🏷️ On the inner wall of the refrigerator compartment, usually to the left or right of the shelf.
- 🏷️ On the back wall of the case, closer to the compressor (you need to move the unit).
- 🏷️ In the technical data sheet of the product, which is included with the purchase.
- 🏷️ On the inside of the door of the refrigerator compartment.
On the nameplate you are interested in the columns “Refrigerant” (Refrigerant) and "Charge" The type of gas (for example, R600a) and its mass in grams (for example, 65g) will be indicated there. If the sticker is erased or missing, you can try to find information on the model on the manufacturer’s official website or in spare parts catalogs by entering the exact model number.
If there is no marking, technicians often rely on reference tables, but this is a less accurate method. The Atlant model range is extensive, and even visually identical refrigerators may have different filling levels depending on the year of manufacture and the installed compressor. Therefore, finding the original tag is a priority before starting any work.
Refilling standards for different Atlant models
Since the line of Atlant refrigerators is very wide, it is impossible to give a single figure for all models. However, it is possible to identify average values characteristic of certain series. Below is a table that will help you navigate the approximate charging rates for popular categories of equipment.
| Refrigerator type | Model range (example) | Refrigerant type | Filling rate (grams) |
|---|---|---|---|
| Single-chamber | MHM 1700, 1800 | R134a | 140 - 160 g |
| Double-chamber (classic) | MHM 2808, 4000 | R134a | 220 - 260 g |
| Two-chamber (No Frost) | Atlant 4425, 4426 | R600a | 55 - 75 g |
| Three-chamber | Series 1734 | R134a | 280 - 320 g |
As can be seen from the table, the transition to isobutane R600a significantly reduced the required amount of gas. While older models required more than 200 grams of freon, modern economical refrigerators are charged with only 60-70 grams. This is due to the higher efficiency of the new refrigerant.
When ordering freon for refilling, always take a cylinder with a reserve. Standard cylinders are sold by weight (for example, 500 g or 1 kg), and one such cylinder will be enough for several refills if you use scales for control. Buying gas “one time” in small disposable cans is often inconvenient due to the difficulty of exact dosage.
Signs of a leak and the need for refueling
Before wondering how much freon is needed, you need to make sure that a leak has actually occurred. A refrigerator may not freeze well for other reasons: a malfunctioning thermostat, a broken fan, or simple freezing of the defrost channel. However, there are specific signs indicating loss of refrigerant.
Symptoms of freon shortage:
- ❄️ The compressor operates continuously without shutting down, but the temperature in the chambers does not drop below +10°C.
- ❄️ The condenser grille on the back wall remains cold or only partially heats up (at the beginning).
- ❄️ In the refrigerator compartment the temperature is higher than normal, and in the freezer the food begins to thaw.
- ❄️ The appearance of swelling on the walls of the evaporator (in location of the leak).
If you observe these symptoms, a visual inspection may reveal oily stains on the tubes. Freon itself is colorless and odorless, but it circulates along with the oil. Where gas leaks, lubricant often leaks out. The location of the leak may be in the foam circuit, which significantly complicates repairs and requires opening the thermal insulation.
⚠️ Attention: If the leak occurs in the foam circuit (inside the wall), simply refilling with freon will not help. The gas will go away again in a few days or weeks. A complex repair is required with the installation of a new evaporator or re-weighting of the circuit.
It is important to understand that freon is not consumed during operation, like gasoline in a car. The system is sealed. If the gas has escaped, it means a hole has formed. Simply “topping up” freon is a temporary measure that will extend the life of the refrigerator for a couple of months, but will not solve the problem forever.
Refilling technology and equipment used
The process of refilling the Atlant refrigerator requires a professional approach and special equipment. To work you will need: a vacuum pump, a pressure gauge station (manifold), electronic scales, a torch or soldering iron for pipes, as well as filter dryers. Without evacuation of the system, refilling is impossible, since air and moisture will remain in the tubes, which will lead to blockage of the capillary.
The sequence of actions when refilling is as follows:
- Eliminating leaks and soldering the service pipe.
- Replacing the filter-drier (required for each depressurization).
- Evacuate the system for 15-30 minutes to remove moisture and air.
- Fill with the exact mass of refrigerant through the scales.
- Sealing the pipe and checking operation.
Particular attention should be paid to the scales. Unlike older systems, where pressure was controlled by a pressure gauge, modern standards require filling by mass. The pressure gauge shows pressure, which depends on the ambient temperature, so it cannot serve as the only guide for determining the amount of gas. Electronic scales allow you to measure the required amount of grams with an accuracy of 1 g.
☑️ Checklist before refueling
When working with R600a special fire safety measures must be observed. Isobutane is heavier than air and, if leaked, accumulates below, near the floor. The room should be well ventilated, and sources of open fire (except for a burner during soldering, when the system is already filled with inert gas or evacuated) should be excluded.
Common mistakes during self-repair
Attempts to save on the services of a specialist often lead to even greater expenses. Home craftsmen make a number of typical mistakes that can completely destroy the refrigerator. One of the most common is refueling “by eye” or until the compressor begins to freeze. This is a direct path to water hammer.
Another mistake is ignoring the replacement of the filter drier. Many people believe that if the filter looks intact, it can be reused. This is a misconception. Inside the filter there is zeolite, which absorbs moisture. Upon contact with air, it instantly becomes saturated with water and stops working. As a result, moisture enters the capillary tube, freezes and blocks the circulation of freon.
Evacuation is also often forgotten. Trying to squeeze air out of the system with freon itself (“blowing”) is ineffective. Moisture remains in the system, which reacts with oil and freon, forming acid. This acid corrodes the compressor windings from the inside, causing it to burn out after a few months of operation.
FAQ: Frequently Asked Questions
Is it possible to fill the Atlant refrigerator with car freon?
Absolutely not. Car air conditioners and household refrigerators use different types of refrigerants and, more importantly, different types of compressor oils. Mixing will cause a chemical reaction, sludge formation and complete failure of the compressor. Use only the type of freon that is indicated on the nameplate of your refrigerator.
How much does it cost to refill with freon at the service?
The price consists of the cost of calling a technician, the cost of the gas itself (freon is sold by weight), replacing the filter-drier and work to eliminate the leak. On average, repairs cost from 3,000 to 6,000 rubles, but the exact amount depends on the difficulty of accessing the leak and the type of refrigerator.
Why does the refrigerator work worse after refueling?
Most likely, the dosage is incorrect. Excess freon increases the pressure in the system, the compressor works overload, and cooling deteriorates. The lack of freon does not allow the desired temperature to be reached. Also, the reason may be poor-quality vacuuming or remaining moisture in the system.
How often do you need to change freon in a refrigerator?
In a working, sealed refrigerator, freon never needs to be changed. It circulates in a closed loop endlessly. If the gas has disappeared somewhere, it means that there is a hole in the system that needs to be found and sealed, and not just adding new gas.