The question of how much freon should be in refrigerator Indesit, often occurs among equipment owners who are faced with the first signs of a temperature violation. Many people mistakenly believe that there is a single universal figure suitable for all models, be it a compact two-chamber unit or a spacious one. In fact, the volume of refrigerant is strictly individual and depends on the specific model, the volume of the chambers and the type of compressor used. No Frost. In fact, the volume of refrigerant is strictly individual and depends on the specific model, the volume of the chambers and the type of compressor used.
Lack or excess refrigerant is equally harmful to the long-term operation of the unit. If the substances in the system are less than normal, the compressor will work hard, trying to reach the set temperature, which will lead to its overheating and eventual breakdown. Excess creates critical pressure, which can rupture the tubes or damage the condenser.
That is why, before starting any maintenance work, it is necessary to accurately determine the type and quantity refrigerant gas. In this article we will analyze the technical nuances, methods for diagnosing leaks and provide reference data on popular series of refrigerators Indesit.
What determines the volume of refrigerant in the system
The amount of freon required for the correct operation of the refrigerator Indesit, is not taken out of thin air, but is calculated by engineers at the design stage of each specific model. The main factor is internal volume of the refrigeration and freezer compartments. The larger the space that needs to be cooled, the longer the evaporator and condenser circuits, and, accordingly, the more working fluid required for circulation.
The second important parameter is the type of defrosting system. In units with manual defrosting or system Drop (drip) circuit design is simpler than in models No Frost. The latter use a complex system of air ducts and a separate evaporator hidden in the rear wall, which often requires the use of more efficient but less voluminous refrigerants or, conversely, increased length of pipes.
⚠️ Attention: The type of refrigerant (R134a or R600a) directly affects the charge weight. Isobutane (R600a) is lighter and requires fewer grams per liter of system volume compared to tetrafluoroethane (R134a).
The amount is also affected by the power and model of the installed compressor. Different units have different performance and internal volume of the oil system, which dictates their requirements for the amount of circulating gas to achieve optimal condensation and boiling pressure.
Main types of refrigerants in Indesit refrigerators
Modern and recent models of refrigerators Indesit predominantly use two types of ozone layer-safe refrigerants. Understanding the differences between them is critically important, since mixing different types of freons is strictly prohibited and will lead to compressor failure.
The first type is R134a (tetrafluoroethane). This is a colorless, odorless gas that replaced the ozone-depleting freon R12. It has excellent cooling performance and operates under higher pressure. In refrigerators Indesit it is most often found in medium and large-volume models produced from the late 90s to the mid-2010s.
The second type is R600a (isobutane). It is a hydrocarbon refrigerant that is becoming increasingly popular due to its high energy efficiency and environmental friendliness. It operates at lower pressure than R134a, but is flammable. Models Indesit isobutane often have a smaller filling weight, estimated in tens of grams, which requires high precision during repairs.
Is it possible to replace R134a with R600a?
Replacing the type of refrigerant is only possible with a complete re-soldering of the system and replacement of the compressor with one adapted to the new gas, as well as replacing the filter-drier. Simply refilling with another freon is unacceptable and dangerous.
You can determine which gas is used in your unit by looking at the factory sticker, which is usually located inside the refrigerator compartment or on the back wall of the housing. Ignoring this information when ordering the services of a specialist may lead to the use of the wrong substance.
How to find out the exact dosage for your model
The most reliable way to find out how many grams of freon your refrigerator needs Indesit is to refer to the technical documentation. However, if the paper instructions are lost, the information is duplicated on a special marking plate. It can be located inside the refrigerator compartment on the side wall, on the plinth below or on the rear metal panel.
On this sticker, in addition to the serial number and production date, the type of refrigerant (for example, Refrigerant: R134a) and its exact mass (for example, Charge: 140g) are always indicated. This figure is the reference figure for factory filling. When repairing, craftsmen often add 5-10% above the norm to compensate for losses during evacuation, but the basic value must be the same.
If the sticker is unreadable or missing, the amount of freon can be calculated by knowing the compressor model and the volume of the chambers, but this method only gives approximate values. The table below shows average data for popular series:
| Series / Model Indesit | Refrigerant type | Approximate weight (grams) | Chamber volume (l) |
|---|---|---|---|
| Indesit C 138 / C 132 | R134a | 120 - 140 | ~270 |
| Indesit DF 4180 (No Frost) | R600a | 60 - 75 | ~300 |
| Indesit B 18 A | R134a | 130 - 150 | ~320 |
| Indesit DS 320 | R600a | 55 - 65 | ~290 |
Important understand that the data in the table is for reference. The actual quantity may vary depending on the year of manufacture and specific modification. Using the wrong dosage, even by 10-15%, can significantly reduce the cooling efficiency.
Signs of freon shortage or leakage
Freon in a working refrigerator Indesit circulates in a closed circuit and should not be consumed or evaporate. If you notice that the unit has begun to work worse, most likely the system has depressurized. A leak can be determined by a number of indirect signs that appear long before the cold completely disappears.
The first alarm bell is a change in the operating mode of the compressor. It may turn on more often than usual or, conversely, work almost non-stop, trying to compensate for the lack of cooling capacity. In this case, the temperature inside the chambers may not drop to the set values, even if the regulator is turned to the maximum.
- 🧊 Weak cooling: food in the refrigerator compartment deteriorates faster, and in the freezer the ice melts or the meat softens.
- 🔊 Noisy operation: the compressor hums more intensely; gurgling or hissing sounds indicating the movement of a mixture of gas and oil.
- 🔥 Housing heating: the side walls or the space between the chambers may become hotter than usual due to an incorrect compression cycle.
- ❄️ Local freezing: ice may appear only in one corner of the evaporator or in the section of the pipeline where gas escaped.
Sometimes the leak occurs in the foamed part of the housing (inside the walls), which makes it visually invisible. In such cases, oily spots may appear on the floor under the refrigerator, since freon comes out along with the compressor oil.
Instructions for checking the pressure in the system
To accurately diagnose the amount of freon and search for leaks, technicians use a pressure gauge manifold. This procedure requires special equipment and skills, as it involves breaking the tightness of the circuit. If you decide to carry out diagnostics yourself, use extreme caution.
The first step is to connect a pressure gauge to the compressor service fitting. Before doing this, you need to make sure that the unit is turned off from the network and has stood for several hours to equalize the pressure in the system. A sudden opening of the valve can lead to the release of oil.
☑️ Pressure diagnostics
Normal static pressure (when the compressor is turned off) depends on the ambient temperature. At a room temperature of +20...+25°C, the pressure in the system should be approximately the same at the inlet and outlet and correspond to the saturated vapor pressure for this type of freon. For R134a this is about 5-6 bar, for R600a - about 2-3 bar.
⚠️ Attention: When working with R600a (isobutane), smoke and use open fire within a radius of 3 meters. This gas is explosive at a concentration in air above 1.3%.
If the pressure gauge shows a pressure close to atmospheric (0 bar), it means that the freon has completely evaporated. If there is pressure, but below normal, you need to look for the leak using a soap solution or an electronic leak detector. After eliminating leaks, the system must be vacuumized before refueling.
The process of refueling and vacuuming
Filling the refrigerator Indesit with freon is the final stage of repair, which requires high precision. A lack of gas will lead to poor cooling, and its excess will lead to an increase in condensation pressure and possible rupture of tubes or failure of the compressor. The amount of refilled substance is controlled by electronic scales.
The process begins with vacuuming the system. This is a critical step to remove air and, more importantly, moisture vapor from the circuits. Moisture in the system freezes in the capillary tube, forming an ice plug that blocks the circulation of freon. Evacuation should last at least 30 minutes.
After creating a vacuum, a refrigerant cylinder is connected to the system. Refueling is carried out strictly using scales, measuring the number of grams with an accuracy of 1-2 grams. For different types of freons, different hoses and filters are used to avoid mixing of oils and gases.
After refueling, the system is sealed by sealing the service pipe. Then the refrigerator is turned on and its operation is checked for several hours, monitoring the temperature of the evaporator and condenser, as well as the absence of extraneous noise.
How long does it take to completely replace freon?
The full cycle of work on finding a leak, eliminating it, vacuuming and refilling the refrigerator Indesit takes from 1.5 to 3 hours. The time depends on the difficulty of accessing the leak (for example, if it is in the foamed part) and the type of refrigerant.
Is it possible to fill the refrigerator with freon yourself?
Theoretically, it is possible if you have equipment (scales, vacuum pump, manifold, burner). However, without experience, there is a high risk of damaging the compressor or creating a fire hazard with isobutane. It is better to entrust this to professionals.
Why does the refrigerator not freeze for a long time after refueling?
The reason may be residual moisture that has formed an ice plug, or an incorrect dosage of freon. It is also possible that the leak was not completely eliminated, and the gas left the system again.
Which freon is better: R134a or R600a?
Both gases are effective, but R600a is more environmentally friendly and economical, but requires more careful sealing due to flammability. R134a is safer to ignite, but less efficient. The choice depends on the design of the particular refrigerator.