Mobile air conditioner
First of all, it is worth understanding the very concept - a mobile air conditioner, and how it differs from the usual split - systems.
This is a device for ventilating air flows in a compact room. Installed in rooms where split-system installation is impossible.
His work has a number of features:
- Mobility
- Compactness
- Convenience during transportation
- High power guarantees good working results (high efficiency of room temperature cooling)
- Carries out work in several modes
- It can not only ventilate and change the temperature of air streams, but also clean them of harmful impurities and microbes.
By their design, floor-standing air conditioners can be single-component monoblocks or split-systems of a mobile type. Both monoblocks and split systems require timely refueling of a mobile air conditioner.
The most popular type of floor standing air conditioner is a single unit. It includes a main body and an air vent pipe. The peculiarity of the device is the intake of air flows from the room and the exit of the processed air to the street through the air pipe.
A floor air conditioner is usually purchased in premises where it is impossible to install a split - system, with the possibility of frequent change of residence. The device is often used as a seasonal room cooler in summer cottages. It is also used when renting a home.
Its main advantages (compactness, portability, ease of use) make this type of device so popular. The device is in the middle price category, therefore it is available for most consumers.
Filling industrial refrigerators with freon
Refueling of industrial refrigerators with freon is carried out exclusively by specialists in a strict sequence. Violation of the rules often leads to incorrect operation of the equipment, the inability to maintain a given temperature regime.
Refueling procedure
The units have special filling valves. Typically, the refrigerant is injected in a liquid state through a pipeline. However, small units, which require a small amount of refrigerant to function, can be charged with gaseous refrigerant through the suction line.
Depending on the design features of the machine, the valve can be located in different places. In models with overheating, it is most often installed on the liquid line in front of the dryer so that traces of moisture contained in the refrigerant are trapped. On models with flooded evaporators, it is located in the same place or between the liquid separator and the expansion valve. In the second case, a dehumidifier must be installed in front of the valve.
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The techniques are also different. The refrigerant can be injected directly from a bottle or using a filling cylinder, which is pre-filled in the workshop with the required amount of refrigerant. The flexible hose from the filling device is first connected to the valve manifold. To exclude the ingress of air into the machine circuit, air is first removed from the flexible hose and only then the nut is tightened to failure at the junction of the connection of the filling valve and the flexible hose.
A cylinder is used for the gaseous refrigerant. If only one valve is provided on it, then it is turned upside down and the procedure begins. As already mentioned, this method is only suitable for small installations.
When charging medium and large models from a liquid refrigerant cylinder, more complex designs are used with two-way valves designed for liquid and vapor. In this case, it is not turned over - it remains in its natural position.
When refueling directly from a cylinder, it is necessary to clearly control the volume of the injected refrigerant. For measurement accuracy, special scales are used, which serve as a kind of electronic dispenser. With a cylinder, everything is easier, since a dose of refrigerant has already been pre-filled into it.
Preparing the refrigeration system for refueling
The most convenient systems for refueling are systems consisting of a cylinder and a vacuum pump. They allow you to enter a strictly metered amount of refrigerant without risking a mistake in the calculations.
If filling is done from a cylinder, then there is such a situation that the pressure in the car and the cylinder is equalized. Refrigerant overflow stops. To continue filling, it is necessary to increase the pressure in the cylinder. This is achieved by immersing it in a bath of warm water. Moreover, the water temperature should not be higher than 40C. It is undesirable to use other heating methods as they can lead to dangerous situations. Another possible option is an electric heating cord to gird the balloon, but it can be very difficult to find the right temperature. Filling cylinders are much easier to use, since their design already has an electric heater operating at a certain temperature regime.
Control of the amount of refrigerant in the system and the quality of the charge
When refueling installations equipped with water-cooled condensers, it is recommended not to stop the circulation of water in them. By lowering its temperature, it turns out to create a supply of refrigerant inside the liquid receiver or condenser.
When the correct amount of refrigerant is poured into the machine, the hoses are disconnected, the valves are closed and the compressor is turned on. Then they wait until the unit reaches a stable operating mode. At this stage, it is important to closely monitor the readings of the pressure gauges and the oil level of the compressor. The charge level is also determined by the quality of the refrigerant flow visible in the sight glass on the liquid line. A solid flow will mean that there is sufficient refrigerant in the system. The appearance of small single bubbles is possible only when the expansion valve is opened, but they are single and disappear very quickly.
If the refrigerant was not filled with enough refrigerant, then bubbles in the liquid stream will constantly appear. This problem must be remedied immediately by adding some refrigerant to the system.
Starting the refrigeration system after refrigerant charge
For the equipment to function properly, it is necessary that the liquid receiver is filled with liquid refrigerant by one third.If a new installation is put into operation, it is not recommended to change the thermostatic expansion valve settings until it reaches steady-state operation.
A change of settings will be required if the superheat in the suction line is too low or, on the contrary, high. This can be understood by comparing the indicators of manometers. It will be difficult for an ignorant person to determine the degree of refueling and the correct functioning of the machine, therefore it is recommended to entrust these procedures only to qualified specialists.
Exploitation
The design of the device assumes ease of assembly and installation. Caring for the system also does not require certain knowledge and skills. Each consumer is able to independently refuel a mobile air conditioner in the event of a refrigerant leak.
For proper operation of the device, you must follow the basic rules for its installation:
- The vent pipe should be installed in a window opening or a special hole in the wall should be installed.
- Place the floor-standing air conditioner close to the air duct opening.
- Make sure that there are no obstacles in the path of the air flow of the device.
- For long lasting work, you must work in accordance with the instructions.
- The operation of the device can be started after 2 hours from the moment of installation.
Refueling
The main reason for the breakdown of floor-standing air conditioners is untimely refueling or its absence at all. The fact is that freon gas is used as the refrigerant of the device, which is subject to evaporation. Thus, a refrigerant usually loses 10% of its mass within a year. Also, during operation, there is a natural leak of freon. Therefore, each consumer needs to be able to refuel the mobile air conditioner himself and periodically carry out this procedure.
Symptoms of a lack of refrigerant:
- Slow work speed
- Poor quality of work
- The presence of extraneous noise
- Increase in electricity consumption
- The appearance of a coating of frost on the body of the device
- Air pipe icing
The appearance of one or more signs during operation indicates the need for a refueling procedure.
Before filling a mobile air conditioner with freon, you should know the main features of filling floor air conditioners:
- The device design implies the use of components in a single housing. The manufacturers provide for complete tightness of the system, therefore the device body is subjected to a soldering procedure. The manufacturer refills the device with freon, after which refueling is not provided. However, any air conditioner is susceptible to refrigerant leakage, therefore, it needs to be filled with freon. Refueling is carried out using a special Schroeder valve mounted in the device, through which freon is supplied.
- The peculiarities of the manufacture of floor-standing air conditioners imply only the procedure for fully filling the device, i.e. partial filling is not suitable in this case.
- Freon types R22 and R407C are used in mobile air conditioners - in more modern devices. R407C is a three-component gas of complex composition. In the event of a leak, only a part of its components is lost, therefore it is impossible to refill this type of refrigerant. A full refueling procedure is required.
The refueling procedure for the mobile air conditioner can be done by yourself. For this, it is recommended to follow the basic rules. It is necessary to read the instructions for refueling mobile air conditioners.
Refueling (refueling) an air conditioner what is it, why is it needed and how is it done.
Introduction.
What is Standard Editing and what is it for? It so happened that in the climate there is a concept of "standard installation", why is it so standard? It includes everything that is enough in most cases, that is, "rules" the majority, therefore, for the sake of simplicity, explaining to the client what we want from him and entering this desired one. For example, a client calls and says that "I want installation", and starting from the "standard" installation, we can already tell him by phone the full cost of installation - well, at least with a probability of 90%. Yes, real specialists working in shops are able to tell you the cost of your installation in 5 minutes of casual conversation! Yes, it happens! Without "standard editing" the process of communicating with clients would be like communication between a deaf person and a blind person, that is, communication would be tedious and, most importantly, long.
Once again - what is standard editing to make it clear? 1. Installation in 1 stage, no house repairs are going on, 2. The external block is hung under the window, 2. The internal block is next to the window, 3. Water drips onto the street, as usual, and not into the sewer (sometimes management companies require it), 4. That part of the pipe that will certainly go through the apartment will be closed with a snow-white plastic box. Wit and that's it !!! You see how simple everything is!)
What if we can't get a standard air conditioner installation? Then you will most likely have some small excess and surcharges, do not be alarmed by this, call us and we will advise you on this issue and together we will decide what can be done or you can familiarize yourself with our prices yourself.
Is it possible not to pay for additional work? Can! But then we do everything according to the "standard installation"!)
Now, in fact, the essence of the question.
Service maintenance of air conditioners: performance check, unit cleaning, disinfection, pressure check and refueling. Often when ordering a new air conditioner, the buyer asks: "Will the air conditioner be refueled during installation?", We answer: "All new air conditioners come from the factory ALREADY with freon, it rarely happens that the nuts are badly tightened and then we refuel it and, of course, it's nothing will not cost in this case ... ". Urgent air conditioner repair and split repair is a high quality service from our service.
Then in what cases is refueling required?
1) An error or imperfection in the installation, the nuts are not tightened well, the freon is gone ", refueling in this case occurs under a guarantee from the installer, that is, free of charge, freon in this case leaves very quickly (especially the modern 410th), no more than a month , symptoms: it does not cool well, what to do: DO NOT use the air conditioner, call the company, otherwise the compressor may fail from overload in a month or two. THIS IS NOT A SCARY MISTAKE, since the nut connection of the crane is a very delicate device, if you overtighten it, the thread will fly, if you fail, then the freon will go away, people learn over the years how funny it sounds to tighten the nuts correctly, this is their professionalism. We are engaged in seasonal and maintenance of air conditioners at affordable prices.
2. The track was punched (for example, during the renovation of the apartment).
3. For long routes, refueling of air conditioners with freon is required (the amount of freon in this case is standardized by the technical documentation for the air conditioner), routes are more than 10-15 meters.
4. The external or internal unit of the air conditioner "lets through" freon, in this case, first, the repair of the air conditioner begins with the air conditioner unit, after that refueling takes place, although it is done already in the service where the air conditioner is being repaired, otherwise how will they check it after the repair?) We offer to our clients urgent and inexpensive repair of air conditioners.
5. Correction of self-dismantling of the air conditioner, performed with errors, for example, with the loss of freon.
What is done when charging the air conditioner with refrigerant?
This type of work is best entrusted to professionals who will help you with the maintenance of the air conditioner and air conditioning systems. 1) The gauge manifold is connected to the nipple outlet for servicing the air conditioner (it is located with a larger diameter tap on the outside of the air conditioner unit on the side), 2) The gauge tap opens, all freon is completely vented, 3) Electronic scales are turned on with an error of up to 1-2 grams, 4. On a cylinder with freon is placed on the scales, the readings of the scales are fixed (in order to understand by the difference in readings how much freon we will fill in the air conditioner in the future), 5. A vacuum pump is connected to the pressure gauge, it turns on, 6. Vacuum of the track and the air conditioner takes place (usually 15-20 minutes if the track up to 10-15 meters), 7. The vacuumator is disconnected, instead of it a bottle with freon is connected to the pressure gauge (still standing on the switched on electronic scales), 8. The valve of the bottle opens, the air conditioner compressor takes the next freon from the bottle under the pressure of the bottle ( this is necessary for the next step so that the air conditioner does not start with an empty "tank" of freon and does not suffer, usually during this operation "itself swelling "freon comes in 200-300 grams or medium-position 1000-1100), 9. The air conditioner turns on in the" cold "mode, the rest of the freon under the pressure of the already operating air conditioner is taken by the compressor, we follow the weights so that the freon is pumped no more and no less than required according to the passport of the air conditioner. 10. The cylinder valve is closed, the freon is in the system, which includes the air conditioner (both blocks and motions and the pressure gauge system), 11. According to the pressure gauge, we wait until the pressure from the system drops to the number "1", which means that the freon is nowhere except the external compressor there is no block left (with this operation we are preparing to disconnect the pressure gauge from the air conditioner and then start the air conditioner without using the pressure gauge), 12. Disconnect the pressure gauge from the air conditioner, 13. Turn off the air conditioner, 14. Disconnect the pressure gauge from the freon bottle, THE AIR CONDITIONER IS FILLED! You can order the cleaning of the air conditioner or refueling the air conditioner on our website at an affordable price.
With which freon to choose an air conditioner - R22 or R410A?
Recently, with the increased struggle for the environment, R22 freon has become a victim of accusations of the destruction of the ozone layer of the earth and the formation of ozone holes. Despite the fact that these accusations were seriously questioned, according to the Montreal Treaty (1987), HVAC manufacturers are obliged to switch to more modern types of refrigerants R410A and R407c.
Another important question we hear very often on the phone: Why do installers bleed my freon from the air conditioner? We have to explain that at the plant, freon is almost always pumped in with a margin of 10% more than required, in this case it is necessary to bleed off the excess. Otherwise, the air conditioner will work and cool incorrectly and defectively. How to understand that there is too much freon? According to the readings of the pressure gauge, the pressure in the system is excessive, this is usually enough to start the freon bleeding procedure. Our online store offers high quality services for refueling, cleaning and repairing air conditioners in Moscow.
Useful links from our website:
— Installation prices
work
— The main types of montages
(diagrams with clear comments)
- You can see what edits there are on the page with photos of our montages
— Development history of our company
— Author's articles about air conditioners written in understandable language
— Section "Promotions"
which will help you save money!
Remember the main thing:
The main guarantee to the buyer is given not by the manufacturer, but by the company (necessarily authorized) that installed the air conditioner.
_________________________________________________
With respect,
Online store of climatic equipment KONDILAK
www.kondilak.ru
email for inquiries: This e-mail address is being protected from spambots, you need JavaScript enabled to view it
The author of the article: Mikhail Pankratov (commissioned by the kondilak.ru store)
All rights to materials and news published on the website www.kondilak.ru are protected in accordance with the legislation of the Russian Federation, are the exclusive property of the copyright holder and are protected, among other things, by the "anti-piracy" law 364-FZ of November 24, 2014. Quoting is allowed without the consent of the Administration site no more than 50% of the volume of the original text with a mandatory direct hyperlink to the page from which the material was borrowed. The hyperlink should be placed directly in the text reproducing the original material (from the site www.kondilak.ru) before and after the quoted block. Otherwise, the Site Administration has the right to go to court with a demand for "eternal" blocking of the domain-site that violates its rights in accordance with Federal Law 364-FZ of November 24, 2014 No.
Instructions
Step-by-step instructions for refueling mobile air conditioners:
- Clean the device before refueling. Remove the accumulated dirt in the housing with a vacuum cleaner. Flush the device with detergents. Dry. Apply antibacterial liquid to the housing. Turn on the device so that the disinfectant liquid gets inside.
- Disconnect the device from the network.
- Solder the filling cord into the device.
- Calculate the amount of refrigerant to be charged. Because mobile air conditioner requires a full refueling, the amount of the required device can be found in the technical documentation for the device.
- Connect an empty bottle to the air conditioner. Pump out the accumulation of excess freon.
- Connect a refrigerant bottle to the device. Fill the conditioner with freon.
- Disconnect the filling cord.
- Seal the device.
After the end of the procedure, it is necessary to check the quality of the work performed. To do this, turn on the device. Set the "cooling" mode with minimum parameters and monitor the operation of the device. If the room temperature corresponds to the declared one, the cooling will occur quickly, there will be no extraneous noise from the device, which means that the refueling procedure was carried out correctly and in compliance with the basic standards.
What problems can there be when refueling
Errors and problems during refueling of an industrial and domestic air conditioner can be of the following nature:
- There is no need to add freon. In this case, the gas must be evacuated.
- Refueling technology violated. If such a situation arises, the contractor analyzes the error (what he did wrong) and continues refueling using the technology.
Filling the air conditioner with freon is a must for the correct operation of the device. There are clear technologies for adding freon to the condenser, the violation of which will lead to breakdown.
You will be interested in: The device and principle of operation of the air conditioner
Freon selection
Before refueling a mobile air conditioner, the consumer should decide on the type of refrigerant for the device. First of all, you need to read the instructions for the device. It indicates which type of refrigerant is recommended to be used and whether the unit can be charged with another type of refrigerant.
Freon is an inert chemical. It has no characteristic color or smell. It can use both liquid and gaseous states. The use of freon does not harm human health.
The most common type of refrigerant is R22. Freon of this type was one of the very first used in air conditioning systems. This type of refrigerant has an affordable price, but its destructive effect on the ozone layer has been proven. Due to its harmful qualities, manufacturers do not recommend using this type.
For mobile air conditioners, manufacturers recommend using new types of refrigerant, such as R407C or R410.These types of refrigerant are safe for the environment. They contain several gases. Due to the safety of use, the presence of useful properties, the use of such types is recommended to all consumers. However, the cost of this type of refrigerant is an order of magnitude higher than that of the previous generation devices. Also, this type of refrigerant is capable of very strongly absorbing humid vapors. This leads to additional dehumidification of the air in the room and an increase in the load on the operation of the device.
It should be remembered that untimely refueling of the device will lead to subsequent breakdown of the compressor - the main part of the device. In this case, an expensive replacement will be required. The cost of a new compressor can be 60-70% of the cost of the air conditioner itself. Therefore, it is advisable to carry out regular diagnostics and timely replenishment of the refrigerant level.
Tips & Tricks
When refueling the air conditioner with your own hands, you need to follow the recommendations. This applies not only to the selection of freon, but also to the whole process.
- The benchmark is made exclusively for the brand of freon specified in the instructions. Typically, this is R410a. Sometimes there are R 22 or R 134a. If you come across R 12, then you should not take it, since this brand is outdated.
- Depending on the brand of freon, a manometric manifold is selected. Its hoses are configured to work only with a specific type of gas. This is due to the fact that the refrigerant contains mineral and synthetic oils.
- The amount of freon is taken with a margin. It is required for purging hoses and filling lines over 3 m. The standard weight is 1 kg.
- During work, you need to devote time to finding places for freon leaks. If found, deal with their elimination.
- Operate the valves in the sequence shown.
- Do not ignore the hose purge step. Oxygen and moisture must not be allowed to enter the system.
- Be sure to tighten the cylinder valve before disconnecting the hoses.
We recommend that you familiarize yourself with: Window air conditioner
