Just delivered from the store or moved to a new apartment refrigerator I want to put it into operation as soon as possible so that the products do not go missing. However, haste in this matter can be fatal for expensive equipment. Physical laws dictate their conditions: during transportation, especially in a horizontal position, oil from the compressor inevitably flows into the pipe system and the evaporator circuit.
If you turn on the unit immediately, the oil in refrigerantwill not have time to return to the crankcase. This will lead to the compressor running dry, which will cause overheating, jamming of the piston group and costly repairs. The time required for settling directly depends on the ambient temperature and the position in which the equipment was transported.
Why you can’t turn on the refrigerator right away
The main reason for the wait lies in the design compressorwhich is the heart of the cooling system. In its lower part there is oil, which lubricates the rubbing parts and ensures the tightness of the valves. When shaking and tilting during loading, this technical fluid is forced into the circuit.
The oil that gets into the system creates an “oil plug” that prevents the normal circulation of the refrigerant. The compressor begins to work with increased load, trying to push through this plug. The result is a sharp rise in pressure and failure of the valve group.
In addition, if transportation was carried out at low temperatures, condensation could form inside the system. Sudden heating of electronics and mechanical parts can lead to a short circuit or deformation of the seals.
The influence of ambient temperature on the settling time
The air temperature in the room plays a critical role in the process of restoring the normal state of the refrigerant and oil. The viscosity of compressor oil changes depending on the degrees, which directly affects the rate of its flow back into the crankcase.
In the warm season, when the room temperature is from +20°C to +25°C, physical processes proceed faster. The oil becomes less viscous and flows down more easily. However, even in summer you should not neglect the minimum required rest time.
Danger of drafts
Do not immediately place the refrigerator in a draft. A sharp temperature change in different parts of the case can cause deformation of the plastic or cracking of the sealing rubber, which will lead to loss of sealing of the chamber.
In winter, the situation becomes more complicated. If the equipment is delivered in cold weather, the oil in the compressor hardens and becomes thick like tar. It takes much longer to warm up and take on a working consistency. Turning on a frozen unit is guaranteed to lead to breakdown.
Table: Recommended settling time
For the convenience of users, we have systematized the data on waiting time depending on transportation conditions. These recommendations are based on the technical regulations of most manufacturers of household appliances.
| Transportation conditions | Environment temperature | Minimum standing time | Optimal time |
|---|---|---|---|
| Vertical position | Summer (+20°C and above) | 2 hours | 3-4 hours |
| Horizontal position | Summer (+20°C and above) | 4 hours | 6-8 hours |
| Vertical position | Winter (below 0°C) | 4 hours | 6 hours |
| Horizontal position | Winter (below 0°C) | 8 hours | 12-24 hours |
Please note that the indicated time intervals are minimum. If it is possible to wait longer, it is better to do so. Refrigerant and the oil is completely stabilized only after a long period of rest.
Transportation rules: vertically or lying down
Transportation in a vertical position has always been considered the ideal option. However, modern logistics services often offer “lying down” transportation to save space in the cargo compartment. This is acceptable, but requires compliance with strict rules.
When transporting on its side, it is important that the equipment lies on the side opposite the tubes exiting the compressor (usually the left side when viewed from the rear). It is also necessary to secure the doors so that they do not swing open and damage the hinges.
If the refrigerator was transported lying down, the standing time should be increased by at least one and a half times compared to vertical transportation. The oil has time to spread throughout the entire system, and it needs time to return to its starting point under the influence of gravity.
Algorithm of actions after delivery
After the refrigerator has been delivered to the installation site, it is necessary to perform a number of preparatory actions before the first start-up. This will ensure a long service life of the equipment.
⚠️ Attention: It is strictly forbidden to plug in the refrigerator if it has just been brought in from the cold. Let it warm up to room temperature naturally, without using heaters.
First remove all shipping elements: tape, foam pads, compressor clamps (if any). Inspect the housing for damage. Then wipe the internal chambers with a soft damp cloth with the addition of a mild detergent.
☑️ Preparation for the first start
Install the unit on a flat surface, adjusting the legs so that the doors close by themselves at a slight angle. Leave the refrigerator open for the rest period so that the smell of new plastic disappears.
First start-up and operation check
When the required time has passed, you can connect the device to the power supply. Don't load products right away. An empty refrigerator must operate for several hours to reach the set temperature.
Listen to the operation of the compressor. It should turn on smoothly, without loud knocking or buzzing. If you hear gurgling or whistling, this may be a sign that the oil has not yet completely returned to its place or there is air in the system.
Check the door for tightness. A sheet of paper sandwiched between the seal and the body must be removed with force. If the paper falls out freely, it means that the door does not fit tightly, and the cold will escape.
Features of modern No Frost models
Refrigerators with the system No Frost have a more complex design with additional fans and evaporators hidden behind plastic panels. Oil getting into these units is especially dangerous, since it is almost impossible to clean them without disassembling.
In such models, the settling time should be the maximum recommended. It is better to play it safe and keep the equipment for 10-12 hours than to risk failure of the defrost system or fan.
It is also worth considering that the electronics of modern models are sensitive to voltage drops. When you turn it on for the first time, it is advisable to use a stabilizer or surge protector to protect microprocessor controls.
What will happen if you turn on the refrigerator right away?
When turned on instantly after transportation while lying down, the compressor will try to compress the mixture of refrigerant and oil. Since the fluid is not compressed, water hammer will occur. The valves will become deformed, the motor will burn out, and the cooling system will get an oil plug that will have to be blown out with nitrogen at a service center.
Is it possible to transport a refrigerator at -10°C?
Technically it is possible, but only in special packaging. However, after being brought into a warm place, such a refrigerator must remain unplugged for at least 24 hours. This is necessary to completely warm up the oil, evaporate condensation inside the electrical circuits and adapt the plastic elements.
Do you need to wash the inside of a new refrigerator?
Yes, definitely. During production and storage in warehouses, industrial dust settles inside the chambers. Wipe all surfaces with a solution of baking soda (1 tablespoon per liter of water) or a weak vinegar solution, then wipe dry.
Why does the refrigerator hum loudly after installation?
A loud hum may indicate that the compressor is touching the housing or pipes, or that the unit is not level. Check the leveling feet. If the new motor is humming, it could be a defect or residual oil in the system that has not yet cleared.