The subtleties of refueling a split system

Proper maintenance of the air conditioner is essential for the correct operation of the air conditioner for a long time. It necessarily includes refueling the split system with freon. If this is done regularly, then the operation of the unit will be of high quality and stable. It is worth noting that refueling is necessary both in the event of a breakdown of the air conditioner, and after its installation in a new place. The refueling procedure can be entrusted to the masters or carried out independently.

If the air conditioner serves for a rather long time, the question arises about the need to refuel it with freon. It becomes especially relevant when the unit is ineffective. As soon as a loss of power or insufficient cooling by the air conditioner in the room is noticed, it is worth checking if the device needs refueling. A number of signs can indicate an insufficient amount of gas in a split system.

• The most basic one is that the fan drives warm air into the room instead of cold air.
• Ice on the service port, which is located on the external unit of the device. Freezing of the indoor unit.
• Non-stop compressor operation.
• Frequent shutdown of the air conditioner and an error message on the display screen.
• Oil begins to bleed through the pipes at the leaks.
• After switching on, the unit makes a long noise before starting the cooling process.

It is also worth considering that over time, the gas is compressed and can seep through small cracks in the instrument. When power is reduced, check the unit for dirt inside the air conditioner. In this case, it is enough to clean it, and the efficiency of the work will be the same.

Freon is the main refrigerant in modern air conditioners. This gas is necessary for the air conditioning compressors to work properly. It is due to freon that the required temperature is maintained in the structure, and the parts of the device are not frozen.

As a rule, the split system is refueled regularly once a year. This period of time was established by the equipment manufacturers during the tests carried out. The documentation for the devices indicates that annually the loss of freon due to leaks can be 6-8%. If the air conditioner is installed correctly, then sometimes it can work without refueling for 3 years. Secure connections prevent gas from leaking quickly and in large volumes.

Of course, there are times when freon needs to be refueled into equipment ahead of schedule. For example, if there are reasons indicating a significant leakage of freon. Most often this happens due to damage to the device. In this case it is important to first repair the air conditioner, and then fill it with gas.

Refueling may also be necessary due to improper installation of the cooling device. Quite often breakdowns of cooling units occur during transportation.

Immediately before self-filling the air conditioner with freon, it is necessary to carry out a number of preparatory work. First of all, you should take care of the availability of some tools and devices.

• Freon in a bottle, suitable for a specific model of the cooling system. Recently, the most popular is R-410A.
• Dried nitrogen in a cylinder.
• Pressure gauge.
• Electric or simple floor scales.
• A vacuum pump designed for technology.
• Threaded communication tubes for better connection.

In addition to all of the above, you will also need to carry out some activities, after which it will be possible to manually charge the device with refrigerant. Unit preparation begins with draining its parts... This can be done during purging, which uses nitrogen or freon. It is worth emphasizing that freon should be used in this case only if the compartment with it is located in the outdoor unit of the air conditioner.

It is equally important to spend checking all elements of the split system for leaks. This is done by creating high pressure. This method is great for determining if there is a Freon leak or not. The last preparatory stage is it is the removal of air from the device using a vacuum.

Another point that should not be missed when the independent procedure for refueling freon is safety engineering. Of course, freon is a substance that is generally safe for human health. There are no special skills or rules when working with this refrigerant. but it is better to wear fabric gloves on your hands to avoid frostbite. Special glasses will also be useful to protect your eyes from gas.

During refueling work, it is important to ensure that so that the cooling system remains sealed and there are no leaks... An excellent solution would be to carry out the procedure in a well-ventilated area or outdoors. If gas gets on the skin or mucous membranes, rinse them with water as soon as possible, and then apply petroleum jelly.

It is worth knowing that there are several types of refrigerant. Before choosing which one to use, it is advisable to know what they are.

• R-407C Is a mixture of 3 types of freon. This view is intended solely for refueling. If the system with it is depressurized, then it will first have to be completely cleaned of gas, and then refueled. Most often it is used for large split systems for industrial use.
• R-410A is a modern refrigerant. Its main advantages include environmental friendliness and increased performance of cooling systems. This type of gas can be used both for filling and refueling air conditioners.
• R-22 used very rarely. This is due to its destructive effect on the atmosphere. This type was used for filling the very first air conditioners. Not so long ago, it was very popular due to its low cost. However, in terms of most properties, it loses to newer and more expensive refrigerants.

There are quite a few ways to refuel a split system. Each technology has its own pros and cons. This is not to say that some of them are universal. When self-charging devices with refrigerant, you need to choose a method taking into account many factors and features.

• Pressure technology requires you to know how much of the substance contained in the system is acceptable. This information can be found in the documents that come with the unit, or on the manufacturer's official website. The essence of the method lies in the fact that a gas cylinder is connected to the communication pipes by means of a pressure gauge. The gas is supplied in very small portions and the readings of the device are constantly compared with the recommended ones. This is done until the numbers match completely. The disadvantages of this technology include the ability to use devices. It should also be noted that it is time consuming.

• The technology for the mass of the refrigerant consists in the fact that it is necessary to constantly monitor the mass of the freon cylinder. To do this, you can use a convenient scale. As the gas flows into the system, the cylinder becomes lighter. By tracking changes in its weight, you can know how full the device is. It is considered one of the simplest methods. However, it is important to remove the residues of the substance from the system with a vacuum pump before this method.

• The filling cylinder technology is suitable if the exact amount of the substance in the device is known. The lacking volume of refrigerant first fills the cylinder, and then the substance enters the device from it. The main advantage of this method is that there is no need to remove gas residues from the split system.

• The technology for overheating (hypothermia) is reduced to the fact that the difference in temperature indicators is recorded. It should be borne in mind that this method is rather complicated and time consuming.

• Sight glass technology. The essence of the method is that a special glass allows you to monitor the state of a liquid substance. The appearance of bubbles in the unit indicates the need to refill it until they disappear. It is important that the freon moves in a uniform flow. To avoid oversupply, it is worth refueling in small portions.

You can refuel the air conditioner at home by yourself if you have all the necessary tools and appliances. It is advisable to prepare them all in advance. It is worth noting that if you fill the system with your own hands, it is absolutely not necessary to purchase a pressure gauge device. It can always be rented from a special company. The stages of filling the system with freon are as follows.

• The radiator blocks are being cleaned. After that, the fans will definitely work correctly.
• Further freon is produced. There are special locks in the service fittings for this procedure. They must be opened, and after all the substance has come out, the locks must be closed.
• The refrigerant bottle is placed on the scales, and the scales are set to zero. Then the valve on the device quickly opens to release excess air from the hose.
• The temperature is set on the air conditioner at around 18 degrees. It should work for cooling.
• After that, a manometric device is connected to the place of the largest tube coming from the external block of the split system.
• Also, the manometric device is connected to the freon cylinder.
• The valve on the manifold opens, which is responsible for the gas supply. During the process, an increase in pressure and a decrease in temperature in the system will be observed. It is optimal if the pressure rises to 6-7 bar.
• Then the gas supply valve and the valve on the cylinder are closed.

To calculate the amount of refrigerant needed to charge the system, you can weighing the balloon again.

How to refuel the air conditioner with your own hands, see below.