Modern users are often accustomed to digital displays, where it is enough to press a couple of buttons, to change the operating mode of the equipment. However, owners of classic models Atlant are faced with mechanical control, which requires an understanding of the principles of the thermostat. The temperature control here is carried out not electronically, but by physically turning the handle, which makes the process simple, but requiring attention to detail.
Incorrect settings can lead to food spoilage or excessive energy consumption. The mechanical thermostat responds to changes in refrigerant pressure by opening or closing the compressor power supply circuit. Understanding exactly how the internal mechanism interacts will allow you to create ideal conditions for storing food. scale with roller and internal mechanism will allow you to create ideal conditions for storing food.
In this article we will look in detail at how to set the temperature correctly, what the numbers on the scale mean and how to avoid common mistakes when operating your refrigeration equipment.
Design of a mechanical thermostat Atlant
The mechanical thermostat is a complex device hidden behind a plastic handle. Inside the housing is a bellows tube filled with temperature-sensitive gas. When you turn adjusting rolleryou change the tension of the spring, which acts on the bellows membrane. This tension determines at what gas pressure (and therefore at what temperature) the contacts will close or open.
The scale printed on the plastic panel does not directly display degrees Celsius. The numbers 1 to 7 (or Min to Max) indicate the degree of cooling, not a specific temperature. The higher the value you set, the more it will cool fridge compartment. This is an important nuance that often confuses users accustomed to digital display.
The thermostat design is reliable and durable, but it is sensitive to sudden voltage changes and physical damage. The mechanism does not require complex maintenance, but its operation directly affects the cycle of switching on and off the compressor. If the roller rotates too easily or, conversely, jams, this may indicate a malfunction.
⚠️ Attention: Never try to forcefully remove the thermostat knob or pick the mechanism with a screwdriver. The plastic of old models Atlant can be fragile, and one awkward movement will lead to a shaft breakage, after which it will become impossible to set the temperature without replacing the unit.
Deciphering the thermostat scale
Understanding the values on the scale is the key to proper operation. Most models of refrigerators Atlant with mechanical control use a scale from 1 to 7. Sometimes there are options with the inscriptions "Min" and "Max". It is important to remember the main rule: the number on the scale is the cooling power, not the temperature in degrees.
Let's consider what each position of the regulator means:
- 🔹 Position 1 (or Min): Minimum cooling mode. The compressor will turn on rarely, the temperature in the chamber will be close to the upper limit of normal (+5...+7°C). Suitable for storing products that do not require deep freezing, or during the winter.
- 🔹 Position 3-4: Optimal mode for everyday use. At normal room temperature (+18...+25°C), this position ensures stable preservation of food freshness without overloading the engine.
- 🔹 Position 7 (or Max): Maximum cooling mode. The compressor runs almost continuously or with very short pauses. The temperature may drop below 0°C, which will lead to freezing of vegetables and milk in the main chamber.
- 🔹 Position 0 (or Off): Complete shutdown of the refrigeration unit. Power is not supplied to the compressor, the equipment does not work.
The use of extreme scale values (1 and 7) should be short-term. Constant operation at maximum wears out motor-compressor, and operation at minimum in hot weather can lead to defrosting of food.
⚠️ Attention: If you have set the regulator to maximum (7), do not leave the refrigerator in this mode for more than 24 hours. This can lead to freezing of the evaporator and make it difficult for the defrost system to operate if it is not fully automatic.
Step-by-step instructions: how to set the temperature
The process of setting the temperature in a refrigerator Atlant with mechanical control is simple, but requires consistency actions to achieve an accurate result. You should not expect an instant change in temperature immediately after turning the knob - the system needs time to stabilize.
Follow the following steps for correct settings:
- 🔸 Open the refrigerator door and find the thermostat. It is usually located inside the chamber, on the top wall or side, often hidden by a plastic casing.
- 🔸 Determine the current position of the handle. If it is set to “0” or “1” and you need to cool food, turn the roller clockwise to value 3 or 4.
- 🔸 Close the door tightly. Make sure that the seal fits around the entire perimeter, otherwise the cold will escape and the thermostat will not be able to correctly read the temperature.
- 🔸 Wait 6-8 hours. This is exactly how long it takes refrigerant to circulate and stabilize the temperature throughout the entire volume of the chamber.
If after waiting the temperature does not suit you, adjust the position of the roller smoothly, step by step (no more than one division at a time). A sharp turn from 3 to 7 at once will create a stressful load on the system.
☑️ Check after setup
The influence of external factors on the settings
The mechanical thermostat reacts not only to the internal temperature, but also indirectly depends on environmental conditions. The temperature in the room, the frequency of opening the doors and the number of loaded products - all this influences which position of the roller will be optimal.
In the summer, when the ambient temperature in the kitchen is high, thermal insulation works less effectively. In such cases, it may be necessary to move the control closer to settings 4 or 5 to compensate for the heat gain. In winter, on the contrary, when the room is cool, value 2 or 3 may be excessive, and the food will begin to freeze at the back wall.
It is also worth considering how full the chamber is. An empty refrigerator cools down faster, but it also heats up instantly from the warm air when the door is opened. A full chamber keeps the cold longer due to the heat capacity of the food, but requires more time for initial cooling. Thermal sensor in mechanical systems it is often placed on the evaporator or in the air duct, so it responds to the temperature of the air, not the food.
Typical errors during operation
Owners of refrigerators Atlant often make the same type of mistakes, trying to “improve” the operation of the equipment or simply out of ignorance. These actions can shorten the service life of the unit or deteriorate the quality of food storage.
One of the most common mistakes is setting the regulator to maximum immediately after loading a large amount of warm products. Users think this will speed up cooling. In reality, the compressor will simply work itself into overdrive, trying to reach an impossible target until the heat dissipates. It is more correct to let the products cool to room temperature before loading.
Another mistake is ignoring seasonality. Many people forget to adjust the position of the roller when the heating season changes. In summer, it can be hot on a “troika”, but in winter on the same “troika” it can be too cold.
Also, users often confuse the temperature adjustment of the refrigerator and freezer compartments. In two-chamber models with one compressor and mechanical control usually only the temperature in the refrigerator compartment is regulated. The temperature in the freezer depends on the operating time of the compressor, which is set by the thermostat of the refrigeration chamber, and on the position of the damper (if there is one), but you cannot adjust the freezer directly with a roller.
Table of recommended settings
To simplify the setup task, we will provide a summary table that will help navigate the choice of the position of the regulator depending on operating conditions.
| Operating conditions | Room temperature | Recommended roller position | Purpose of setting |
|---|---|---|---|
| Standard | +18...+25°C | 3 - 4 | Daily storage |
| Hot (Summer) | +26...+32°C | 4 - 5 | Heat gain compensation |
| Cold (Winter) | +10...+16°C | 2 - 3 | Prevention of freezing |
| Loading with products | Any | 5 (temporarily) | Fast cooling (up to 12 hours) |
Use These recommendations will extend the life of your Atlanta and keep food fresh. Remember that the mechanics require observation: if you notice that a “coat” of ice has appeared on the back wall, and the regulator is set to 5-7, it means that the mode is selected incorrectly.
⚠️ Attention: If, when turning the roller, you do not feel characteristic resistance or you hear a crackling sound inside the thermostat housing, immediately stop rotating. This may mean a breakdown of the internal mechanism, and further attempts at adjustment will lead to complete failure of the unit.
Diagnostics of temperature problems
Sometimes it happens that you have set the correct position, but the refrigerator behaves strangely: it either does not turn off at all or does not dial up cold. This may indicate a malfunction that cannot be solved by simply twisting the roller.
If the compressor is running non-stop, and the temperature in the chamber is above +10°C even in position 7, a leak is likely refrigerant or loss of compressor performance. If the refrigerator turns off, but it’s warm inside, the contacts of the thermostat may be stuck or the capillary tube has moved.
If the food in the refrigerator freezes even at the minimum setting (1), the problem may lie in sticking contacts of the thermostat in the closed state. The mechanism “does not see” that the temperature has already been reached and continues to supply power to the motor.
What to do if the regulator scrolls endlessly?
If the thermostat roller rotates without clicks and without changing resistance in both directions, most likely the shaft or internal gear is broken. In this case, temperature adjustment is impossible; the thermostat must be replaced. Operation in this mode is dangerous, since the refrigerator can either defrost or freeze all the food.
For accurate diagnostics, a multimeter is often required to check the thermostat contacts for opening when cooling. However, the initial assessment can be carried out visually and aurally, tracking the motor operating cycles.
What to do if, after turning the roller, the temperature does not change?
If you changed the position of the regulator, more than 12 hours have passed, and the temperature has not stabilized, check the tightness of the door and the integrity of the seal. Also make sure that the products do not block the air channels (if the model is No Frost) or do not touch the back wall. If these factors are excluded, there may be a malfunction of the thermostat itself or a freon leak.
Is it possible to replace a mechanical thermostat with an electronic one?
Theoretically, this is possible, but it requires a deep modification of the electrical circuit of the refrigerator Atlant, installation of sensors and a controller. The factory does not provide for such a modification. It is easier and more reliable to replace a failed mechanical thermostat with a similar new one, selecting it according to the marking.
Why does the refrigerator click when the thermostat is operating?
A click when the compressor is turned on or off is the normal operation of the thermostat contacts. However, loud clicks, crackling or buzzing noises may indicate that the contacts are burning or the mechanism is worn out. If clicks are accompanied by the motor not starting, it may be necessary to replace the start relay or the thermostat itself.
How to defrost an Atlant refrigerator with a mechanical control?
To defrost, turn the knob to the "0" or "Off" position and disconnect the device from the mains. Leave the doors open. The mechanical thermostat does not have an automatic defrosting function in the classical sense (except for models with a drip system, where water flows into the pan when the compressor is turned off), so manual defrosting is necessary at least 1-2 times a year.