Moving or buying new household appliances - There is always stress associated with logistics and physical effort, but the most critical moment is the finish line. Many owners, tired of cleaning, make the same mistake: they rush to check the performance of the unit as soon as they install it in the kitchen. Ignoring the adaptation period can lead to the failure of an expensive compressor, which is the heart of the entire system.
Physical laws of thermodynamics dictate their conditions: the oil in the system must completely return to the crankcase, and the refrigerant must take its working position. If you start the engine when the tubes are filled with oil or liquid freon, a water hammer or jamming of the piston group will occur. In this article we will analyze in detail why time-out before the first launch is so important and what specific waiting times depend on.
The time that needs to wait varies depending on many factors: from the angle of inclination during transportation to the air temperature outside. The minimum safe period for horizontal transportation is 4 hours, but for vertical transportation in winter it can reach 24 hours. Understanding these nuances will help you avoid costly repairs and maintain the manufacturer's warranty.
Physical processes inside the compressor during transportation
To understand the importance pause before turning on, you need to look inside the device. Compressor - this is a sealed pump that drives the refrigerant through the system. In its lower part there is always a special compressor oil, which lubricates the rubbing parts and ensures the tightness of the gaps. During normal operation, the oil is in the crankcase, but during shaking and tilting, it inevitably enters the circulation circuit.
If you start the unit while the oil is in the heat exchangers of the evaporator or condenser, it will not have time to lubricate the mechanism at the right time. Moreover, liquid oil that gets into the cylinder is incompressible, which will lead to instant destruction of the valves or piston. Inverter models are especially sensitive to the quality of the lubricant, since they operate in a wide speed range.
In addition, during transportation, the oil is often mixed and refrigerant. The emulsion needs time to separate: the heavy oil should flow down and the freon gas should rise up. This process is called separation and it is critical for the correct operation of the refrigeration circuit. Attention: Trying to start the refrigerator immediately after delivery often leads to humming, vibration and subsequent stopping of the motor. This is a protective reaction or the beginning of mechanical destruction. refrigeration circuit.
⚠️ Attention: Trying to start the refrigerator immediately after delivery often results in humming, vibration and subsequent motor stoppage. This is a defensive reaction or the beginning of mechanical destruction.
Modern models may have complex lubrication systems where oil is sprayed under pressure. An imbalance of the liquid in the system can lead to the refrigerator working, but not cooling, since the oil plug will block the freon flow in the capillary tube. The influence of the method of transportation on the waiting time. The method of transportation is the main factor determining the duration of settling. Manufacturers always recommend transporting equipment in a strictly vertical position, but the realities of life often dictate their conditions, and the equipment has to be put down. The angle of inclination directly affects the volume of oil entering the system. capillary tube.
Impact of transportation method on waiting time
The method of transportation is the main factor determining the duration of settling. Manufacturers always recommend transporting equipment in a strictly vertical position, but the realities of life often dictate their conditions, and the equipment has to be put down. The angle of inclination directly affects the volume of oil entering the system.
During vertical transportation, even with slight shaking, the oil mainly remains in the crankcase, only partially splashing along the walls. In this case, the process of gravitational flow takes a minimum of time. If the refrigerator was transported lying down, the situation changes radically: the oil flows freely into the evaporator and condenser, from where it is quite difficult to expel it back under the influence of gravity alone.
- 🚛 Vertical transportation: the minimum waiting time, usually from 2 to 4 hours, is enough to stabilize the temperature sensors.
- 📦 Horizontal transportation (lying down): requires long-term settling, since the oil spreads throughout the entire tube system.
- ↗️ Transportation at an angle: an intermediate option, depending on how strongly the body was tilted relative to the vertical.
It is important to take vibration into account. Even when installed vertically in a truck bed, constant shaking can lift slurry oil high into the system. Therefore, the rule “the longer it sits, the better” works flawlessly here. You should not rush to turn it on, even if visually it seems that everything is calm.
Winter transportation and temperature conditions
The issue of transportation in the cold season deserves special attention. Low temperatures affect not only the settling time, but also the physical state of the materials. At subzero temperatures, compressor oil thickens, becoming viscous, almost like honey or tar. In this state, it cannot effectively drain into the crankcase.
If you bring a cold refrigerator from frost into a warm room, condensation will instantly form on its internal parts. Moisture on the electrical contacts may cause a short circuit during initial startup. Therefore, before thinking about the operating time of the compressor, you need to simply let the equipment warm up to room temperature.
Thermal expansion materials also play a role. Sudden temperature changes can lead to microcracks in the soldering of tubes or damage to the plastic elements of the inner chamber if the unit is turned on immediately. Metal and plastic must expand evenly.
Why can’t you turn on a frozen refrigerator?
If you start the compressor while the oil has frozen, it will not be able to lubricate the rubbing vapors. This will lead to dry operation, overheating and jamming of the motor shaft. In addition, the cold refrigerant may not evaporate completely and enter the compressor in liquid form, causing water hammer.
In winter, the total waiting time consists of two stages: the time to warm up to room temperature (usually 3-4 hours) plus the time for oil to drain. In total, this can take up to a day if there was severe frost outside.
Recommended settling time for different models
There is no single figure that would suit everyone without exception. Different types of compressors and design features dictate their timing. Old models with open motors and modern inverter systems require a different approach to the first start-up.
For classic single-compressor refrigerators that were transported vertically, 2-3 hours is often enough. However, if we are talking about dual-circuit systems or models with No Frost, where the tube system is more complex and longer, it is better to increase the time. The oil must leave not only the main circuit, but also additional lines.
| Type of transportation | Conditions | Minimum time | Optimal time |
|---|---|---|---|
| Vertical | Summer, no shaking | 2 hours | 4 hours |
| Vertical | Winter (from the street) | 4 hours | 6-8 hours |
| Horizontal | Summer | 6 hours | 12 hours |
| Horizontal | Winter (from the street) | 12 hours | 24 hours |
Please note that the minimum values are indicated. If you have the opportunity to wait longer - for example, leave the refrigerator overnight before turning it on - this will only be a plus for the resource of the equipment. No one knows the exact volume of oil that got into the tubes, so a reserve of time is never superfluous.
Correct installation and preparation for the first start
Time has passed and you are ready to turn on the equipment. However, simply plugging into a socket is not enough. Correct installation affects noise, vibration and cooling efficiency. An incorrectly positioned refrigerator may make a hum or not close the doors tightly.
The first thing to do is remove all shipping tape and packaging. Pay special attention to the internal fixation of the compressor. Some manufacturers install special transportation bolts or bars, which Be sure to remove before operation. If this is not done, the compressor will hang on the springs and break the tubes at the first start.
- 🔧 Adjusting the legs: Unscrew the support screws so that the housing is stable and does not wobble.
- 📐 Back slope: It is recommended to adjust the legs so that the door closes itself when opened by 10-15 degrees.
- 💨 Ventilation: make sure that there is a gap of at least 5-7 cm between the back wall and the furniture to remove heat from the condenser.
☑️ Preparation for the first start
After installation, wipe the internal chambers with a soft cloth soaked in a weak soda solution or a special product for household appliances. This will remove factory dust and plastic smell. Let the chambers dry before loading the products.
Algorithm for first switching on and testing functionality
The moment of truth has arrived. Plug in the refrigerator. In the first seconds you may hear a characteristic buzzing or gurgling sound - this is normal, the refrigerant begins to move. However, pay attention to the behavior of the motor: it should not work continuously without breaks for the first hour.
Modern electronically controlled models can first run a test program, the indicators light up, and only then the compressor will start. Don't be alarmed if the unit doesn't start cooling in the first minute. The system should build up pressure and stabilize the cycles.
⚠️ Attention: If after turning on you hear a loud knock, grinding sound or see sparking in the area of the rear panel, immediately disconnect the device from the network. These are signs of mechanical failure or oil getting into the cylinder.
To fully test the functionality, leave the empty refrigerator running for 2-3 hours. During this time, it should gain temperature and automatically turn off (or go into temperature maintenance mode). Only after this can you load products. A sudden loading of warm food will cause the compressor to wear out.
Common mistakes when starting new equipment
Even knowing the rules, people often make annoying mistakes that shorten the life of the equipment. The most common of them is ignoring instructions for the sake of speed. The desire to cool drinks or food faster leads to premature switching on.
Another mistake is installing the refrigerator close to the wall or in a niche without gaps. In this case, heat is not removed from the condenser, the compressor overheats and works without interruption, trying to gain temperature. This is especially true for built-in models, where ventilation is limited by the design of the furniture.
Also, users often forget to check the voltage in the network. Voltage surges during first startup can be fatal to electronics. Using a surge protector or stabilizer would be a smart step to protect expensive equipment.
The myth about the “development” of the compressor
There is an opinion that a new refrigerator needs to be “run” without food for a day. This is only partly true. Idling is needed to check cycles and the absence of leaks, but long-term operation without a heat exchanger (products) is not a mandatory procedure for all models.
Is it possible to turn on the refrigerator immediately if it was only transported in an elevator?
Even a short trip in an elevator causes shaking and vibration. If the refrigerator was transported vertically and carefully, 2 hours is enough. But if the elevator was shaking or the refrigerator was leaning against it, it is better to wait the standard 4 hours to guarantee safety.
What happens if you turn on the refrigerator 1 hour after transporting it lying down?
There is a high probability of water hammer. Liquid oil will enter the compression chamber, which can lead to valve failure. The compressor may hum, become overloaded and burn out, or the system will simply stop cooling due to an oil plug.
Is it necessary to defrost a new refrigerator before turning it on for the first time?
No, you do not need to defrost a new refrigerator, since it is new and dry. However, washing the chambers with warm water and soda to remove factory smell and dust is a mandatory hygienic procedure.
How long does it take the refrigerator to reach the temperature after the first turn on?
Usually it takes from 3 to 6 hours to completely cool the chambers to the specified parameters, depending on the volume of the chamber, the temperature in the room and the number of loaded products. The freezer can take longer to reach -18°C.