Buying a new refrigerator or moving to a new apartment is always an exciting moment associated with logistics and proper installation of household appliances. Particularly acute is the question of how to properly start the unit so that it will serve for many years without breakdowns. Owners are most often interested in a specific time period that must be maintained before connecting to the network for the first time.
Many mistakenly believe that modern production technologies make it possible to ignore transportation rules, but the physics of the compressor operation remains unchanged. No Frost refrigerator is a complex system where the circulation of refrigerant and lubrication of mechanisms depend on the correct position of the housing. Violation of the basic rules of rest can lead to serious consequences for the engine.
In this article we will analyze in detail why you should not rush, what factors influence the waiting time and how to prepare the equipment for the first start-up. You will learn how the requirements for different types of compressors differ and what to do if the unit had to be transported in a horizontal position.
Physical processes inside the compressor during transportation
The heart of any refrigerator is the compressor, inside which there is a motor and a special oil bath. In operating condition, the oil is located in the compressor crankcase, providing lubrication to the rubbing parts. However, during transportation, especially if the refrigerator was tilted or transported lying down, refrigeration oil it can flow into the system circuits, in particular into the evaporator or condenser.
If you turn on the unit immediately after delivery, the oil will not have time to drain back into the crankcase. This will lead to the compressor running dry, which causes instant overheating and jamming of the piston group. In addition, the entry of oil into the heat exchanger sharply reduces the cooling efficiency, since the oil film prevents normal heat transfer.
The time required for the liquid to drain back into the reservoir depends on the viscosity of the oil and the design (pipeline). Gravity must do its job completely. In models with the system No Frost air circulation and fan operation also depend on stable refrigerant pressure, which is disrupted in the presence of oil plugs.
⚠️ Attention: An attempt to start the compressor with oil in the system can lead to water hammer. The liquid is incompressible, and the piston, trying to compress the oil plug, can break the valves or connecting rod.
It is important to understand that even if the refrigerator was transported strictly vertically, vibrations when the truck moved could cause the internal components to loosen and the oil to foam. Therefore, a short rest is required in any case, regardless of the accuracy of transportation.
Factors influencing settling time
There is no single figure that is suitable for absolutely all cases. The time after which you can turn on refrigeratordirectly depends on the conditions of its movement. The main criterion here is the position of the body relative to the ground during transportation.
If the unit was transported in a vertical position, without strong tilts (more than 40 degrees), then the process of draining the oil takes minimal time. In this case, it is enough to let the equipment stand for 2 to 4 hours. This period is enough for the pressure in the system to stabilize and the electronic components to calm down after shaking.
A completely different situation arises when the refrigerator was transported lying down. In this position, the oil is guaranteed to flow into the circuits of the evaporator located behind the rear wall of the chamber. Returning the liquid to the compressor requires much more time - at least 8 hours, and it is better to leave the unit for a day.
- 🕒 Vertical transportation: 2-4 hours of rest is enough for stabilization.
- 🛌 Horizontal transportation: it takes 8 to 24 hours for the oil to completely drain.
- ❄️ Winter transportation: if the refrigerator was brought in from the cold, the waiting time increases to warm up the plastic and electronics.
- 🌡️ Ambient temperature: in a cold room processes are slower, it takes more time.
It is also worth considering seasonality. If the purchase was made in winter and the refrigerator was at subzero temperatures for some time, there is absolutely no need to rush into turning it on. A sudden change in temperature can cause condensation to form on the electrical contacts, resulting in a short circuit.
The specifics of the No Frost system and inverter compressors
Technology No Frost implies the presence of additional fans, defrosting heating elements and a complex system of air channels. Although the operating principle of the compressor here is similar to drip models, the requirements for system cleanliness remain high. Any oil in the air channels can lead to an unpleasant odor or noisy operation of the fan.
Models with inverter compressordeserve special attention. Such motors work differently than traditional linear ones: they do not turn off completely, but only change the rotation speed. Their starting currents are lower, but the sensitivity to the quality of the lubricant and the cleanliness of the freon line is higher. Inverters are more compact and have a smaller oil sump, so the risk of running “dry” if started incorrectly increases.
Modern LG refrigerators, Samsung or Bosch are often equipped with just such engines. Manufacturers recommend that you be especially attentive to the instructions when installing expensive equipment. Violation of the rules of rest may cause refusal of warranty service, since service engineers can easily determine the operation of a compressor without oil by the nature of wear.
⚠️ Attention: Inverter compressors are very sensitive to voltage drops. Before turning on for the first time, make sure that your wiring is in good condition and do not use an extension cord.
In systems with a double cooling circuit (when separate compressors are running for the refrigerator and freezer compartments or one compressor with separate circuits), the volume of oil in the system is greater. Accordingly, the time it takes to return to the crankcase also increases. Do not ignore this factor if you have a multi-chamber unit.
What is the difference between an inverter compressor and a conventional one?
A conventional compressor works on the “on-off” principle, creating noise and temperature surges. The inverter smoothly regulates power, operating almost silently and maintaining the temperature with an accuracy of 0.1 degrees, which is better for products.
Step-by-step instructions: preparing for the first start
Correct installation is the key to long service. After you have met the required time interval, do not rush to load the products right away. There is a clear algorithm of actions that will help to avoid mistakes.
First you need to remove all transport elements. This can be tape, foam pads, fixing shelves and drawers, as well as film. Pay special attention to the internal packaging - sometimes plastic holders are forgotten inside the chambers, and their removal is critical for air circulation in the system No Frost.
Next, you should wash the internal surfaces. Use a weak soda solution or a special refrigerator cleaner. Aggressive chemicals cannot be used, as the smell may be absorbed into the plastic. After washing, the doors should remain open until the surfaces are completely dry.
☑️ Preparing the refrigerator for startup
An important step is to level the refrigerator. Misalignment of the housing can lead to loose fitting of the doors and improper operation of the condensate drainage system. Use adjustable supports and a building level. The doors should open freely and slam shut on their own when opened to 45 degrees.
Only after all preparatory work has been completed, including drying the chambers and the rest time has elapsed, can you plug the power cord into the outlet. Do not use low quality surge protectors or extension cords - connecting directly to the wall is the safest option.
Table of waiting time depending on conditions
For ease of perception of information, we systematize data on How long can you turn it on equipment into a single table. These data are average recommendations for most modern models.
| Transportation conditions | Minimum rest time | Recommended time | Special instructions |
|---|---|---|---|
| Vertical, summer | 2 hours | 4 hours | Enough for oil to drain |
| Vertical, winter | 4 hours | 6-8 hours | Need to be warmed up to room temperature |
| Horizontal (lying down) | 8 hours | 12-24 hours | The oil should completely leave the circuits |
| Under a strong slope | 6 hours | 12 hours | Comparable to horizontal transportation |
It is worth noting that the instructions for specific models, for example Indesit or Atlantmay have their own nuances. Always check the manufacturer's documentation if available. However, if the documentation is lost, following the rules from this table will be the safest solution.
Exceeding the settling time does not have any negative consequences. If you leave the refrigerator standing for a day instead of eight hours, nothing bad will happen to it. But reducing this time is a direct risk for the equipment.
First start-up and operation check
After being plugged into the network, the refrigerator does not start freezing instantly. It takes time for the compressor to build up pressure and start the refrigerant cycle. In the first minutes, you may hear gurgling or rustling - this is normal, this is how freon flows.
The system No Frost must first cool the evaporator hidden behind the rear panel, and only then start the fan to supply cold air into the chamber. Therefore, do not be alarmed if it is warm inside for the first 30-40 minutes. Complete cooling to the set parameters takes from 2 to 6 hours, depending on the volume of the chambers and the room temperature.
During this period, do not open the doors frequently and do not load food. An empty refrigerator will rise to temperature faster. It is better to load in small portions, giving the equipment time to restore the mode after each addition of warm items.
Pay attention to the operation of the motor. It can work cyclically: turn on, work for a while and turn off (or reduce speed in inverter models). If the compressor hums continuously for more than 6-8 hours without breaks, this may indicate a freon leak or a malfunction of the thermostat.
What should you do if the refrigerator hums loudly after turning on?
A loud hum in the first minutes can be caused by vibration of the housing on the floor or wall. Check whether the refrigerator is level and whether its pipes are touching the back of the wall. If vibration is excluded, and the sound does not subside after an hour of operation, this is a reason to contact service.
Is it possible to turn on the refrigerator if it has been standing in the cold?
It is strictly forbidden to turn on the unit immediately after it has been brought in from the cold. Condensation inside the circuit will cause a short circuit. Let it stand in a warm place for at least 4-6 hours (preferably a day) without plugging it in.
Do you need to wash the refrigerator before turning it on for the first time?
Yes, definitely. During production and storage in warehouses, technical dust settles inside, and the plastic may have an odor. Wipe the chambers with a damp cloth and soda and let dry.
Why can’t you tilt the refrigerator more than 40 degrees?
When the tilt is strong, the oil from the compressor flows freely into the circuit tubes. In addition, the motor inside the casing may move, which, when turned on, will lead to damage from vibration.
How long does it take for the refrigerator to reach temperature for the first time?
Usually the primary cooling process takes from 2 to 6 hours. The exact time depends on the temperature in the room, the volume of the chambers and the number of loaded products. Do not fill the chamber completely in the first hour.