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Installation of a multi-zone air conditioning system. The cost of installation of air conditioning systems VRV & VRF, Super Multi, Multi Split, Split and additional equipment. Interesting facts about multizone systems

Multi-zone systems, or VRV systems, are inverter systems that are an excellent solution for air conditioning buildings with a large number of rooms, as well as places that need separate, zonal temperature control and increased comfort requirements (cottages, residential complexes, luxury apartments, office buildings, sports and commercial premises, hotels).

VRV systems first appeared in 1982. They were developed by Daikin and were designed to save energy. In such systems, for the first time, they began to use halogen instead of water, which made air conditioners 10 times more efficient. Due to their efficiency and Daikin's patented refrigerant oil return system, VRV units quickly became popular in more than 70 countries around the world.

The advantages of VRV systems are obvious:

efficiency, both energy (due to the rational use of the air distribution system and the efficiency of all elements of the VRV system), and spatial (due to the compactness of the constituent units);
ease of design and installation of VRV (due to the architectural features of such a system (a fairly large allowable distance between the external and internal units, both in height and in length);
advanced control of the VRV multi-zone system (it is possible to regulate the conditions both individually for each room using a wireless remote control, and the entire branched system from one remote control or computer);
reliability of the entire system even in case of failure of any of the elements due to the joint functioning.

Due to the fact that VRV is a registered trademark of Daikin, similar systems manufactured by other companies are commonly referred to as VRF. Therefore, when searching for the necessary systems, you can come across any of these abbreviations.

Multizone systems have a number of features in their design, which in turn affects the features of installation, as well as the price that installation will cost. Among the features that affect the installation of VRV systems are the following:

Horizontally, the distance between the indoor and outdoor units of the system should not exceed 100 meters;

The vertical distance between the indoor and outdoor units of the system should not exceed 50 meters;

A single piping system connecting the outdoor and indoor units (unlike conventional split systems, where a separate path is laid to each indoor unit);

Organization of a centralized control panel through a computer;

High qualification requirements for workers who install VRV systems;

Labor-intensive preparatory work;

The ability to carry out installation work in stages.

Before proceeding with the installation of a multi-zone system, it is necessary to make appropriate measurements and calculations, select the appropriate equipment and, based on this, create drawings. As you can see, the preparatory stage is quite complicated, requiring the involvement of experienced and qualified specialists. This will determine how quickly and efficiently the installation of VRV systems will be carried out, as well as the correct calculation of the cost of work. The undoubted advantage of installing such systems is the ability to gradually connect new elements if the system needs to be expanded.

VRV system device

The VRV system is based on a modular principle. The number of modules used depends on the number of rooms and zones in the building where the equipment will be installed. The system is scalable: if necessary, the system can provide fresh air to additional rooms and annexes that previously did not require air conditioning.

The system consists of an outdoor unit and several monoblocks that freshen the indoor air. The outdoor unit is mounted on the street, on the wall of the building, and is connected to the monoblocks using pipes through which air enters with the required amount of refrigerant. On the monoblocks themselves, you can also install a heating system and additional filters.

Typically, the design of VRV systems is carried out in the following sequence:

Calculation of heat gains in air-conditioned rooms.

Choice of type, capacity and location of indoor units.

Choice of type, capacity and number of systems.

Determination of the installation location of the outdoor units of the VRF (VRV) system.

Hydraulic calculation and routing of freon pipelines.

Laying of drainage pipelines.

Selection and design of a jointly working ventilation system.

Design of the power supply system.

Determination of the composition of the control system and routing of control cables

The design of the VRV(VRF) system ensures the optimal selection of equipment in accordance with the required loads, allows for accurate and consistent installation, and also provides detailed information for subsequent operation.

systems can be produced even taking into account the fact that the building was not originally designed for this. For pipes, existing technological holes are usually used, and the monoblocks themselves are mounted on walls or ceilings.
To date, systems with automated or manual control are common. VRV systems are produced by so many companies, so the lineup This type of air conditioning equipment is quite diverse.

VRV installation steps

Installation of indoor units
Installation of outdoor units
Designing a refrigerant counterdraft
Crimping freon pipeline
Vacuuming pipelines
Refueling refrigerant
Start-up work

Installation of VRV can be conditionally divided into a number of stages. The fidelity and accuracy of work on each of them is the key to good functionality and durability of the system.

The first stage, on which the performance of the future system depends, is the development of the project. At this stage, a thorough examination of the object and its design documentation is carried out, and appropriate measurements are made. An important point is the correct selection of equipment and technological requirements of manufacturers, in accordance with which the installation of VRV must be carried out. Ideally, the project should be designed not only for the installation of a multi-zone system, but also for the prospect of changing or expanding it. No less important for this stage is a "fitting" on the spot, i.e. a survey of how, where and to what the equipment and elements of the system will be attached, what will be nearby. All this will help to avoid unwanted moments in the future.

In the second stage, the installation of VRV includes the direct installation of indoor and outdoor units. For outdoor units, a mandatory requirement is the presence of a vibration-damping foundation. Installation of indoor units may vary depending on which type is selected (wall-mounted, floor-ceiling, ducted).

At the third stage, which actually begins the installation of the VRV itself, the laying of copper piping and refrigerant distributors is carried out. This process is of great importance, since the foundation of the future multi-zone system is being laid. The laying of the pipeline involves a certain risk for workers and the installation site as a whole, since soldering is done using torches. In preparation for installation work fire hazard must be taken into account. Upon completion of the pipe laying, the tightness is checked by pumping nitrogen under high pressure.

At the fourth stage, the freon pipeline is pressed and the pipelines are evacuated. Connection of pipelines, signal and power cables requires the accuracy of work and the involvement of specialists of appropriate qualifications in order to avoid problems in the operation of the system. The installation of the VRV at this stage is quite responsible and includes a re-check of the tightness.

At the final stage, the system is refueled with freon, after which a trial switching on of the system, its verification and debugging is done.

systems is labor-intensive and, in addition, for this type of installation, installers are required who perform work on VRV installation systems professionally and not for the first year. Installation from the company "RUSVENT" meets all the requirements for the quality of installation. Our team of installers will install multi-zone systems quickly, efficiently and reliably, which will undoubtedly save your money and time. Moreover, we provide a written guarantee and, if necessary, we will give advice on the operation of VRV systems.

A Client contacted our company to purchase a DAIKIN multi-zone system for his country house. The system had already been selected and included in the project, but he wanted to purchase this system without installation, because he wanted to contact another company that installed split systems in his apartment. The client was satisfied with their installation and decided that they would install the VRV system with the same quality. We selected for the client outdoor unit power of 12 kW and 4 internal blocks of the EMURA series on 3.5 and 2.5 kW. Approximately eight months later, the Client called and informed us about a problem in the system he purchased - the system did not start, and the service employees of the company that installed the multizone system could not do anything. When our specialist arrived at the place, he found out the following: due to poor-quality soldering, all freon left the system. In this case, the soldering was already in the plastered wall with a clean finish, and to correct this error, it is necessary to break part of the wall again. It turned out that that company had never installed multizone systems, as a result of which the Client refused their services, and our specialists had to redo and correct the errors of the installers. The indoor units have been replaced with smaller ones. After that, the system worked perfectly, the Client was satisfied with our services. To prevent such incidents from happening to you, we recommend ordering equipment and installation only from companies that have a lot of experience in this area. This will not only help to avoid overpayments when correcting other people's mistakes, but also guarantees you a quality service.

What is multizone In fact, these are temperature control devices that are used in enclosed spaces. The difference from conventional split systems lies in the presence of one Freon per this case is on the same highway. The outdoor unit is most often installed on the roof of the building.

A splitter is used to connect air conditioners. The disadvantage of devices of this type is their high cost. However, it should be noted that the models have a high coefficient of efficiency. To understand the multizone devices in more detail, it is necessary to consider their scheme.

Multizone air conditioning system: scheme

The multi-zone system includes one outdoor unit, which is installed with powerful fan. The compressor for it is selected high-frequency type. The interconnect cable comes off the power supply. A network converter is used to control the system. Modules in multizone systems are used at different frequencies.

The indoor units are connected to the main. Additionally, the scheme of the multizone system includes control panels. The signal is sent to the central control unit. To adjust the temperature, conventional infrared remote controls are used. The expander is connected via a common line. An external valve is used to control freon.

How does the system work?

Multizone systems work by supplying freon through a common line. Air is circulated by means of a fan located in outdoor unit. To supply voltage to the device, there is a compressor, which is controlled by a network converter.

It is also worth noting that splitters are located in the circuit. They are responsible for individual indoor units that are connected to a common system. The central module controls the power supply to the equipment. To adjust the temperature in the rooms, a remote control is used, from which signals are sent to the central unit, which are further processed.

Mounting the model

Installation of a multi-zone air conditioning system in a residential building takes a lot of time. The outdoor unit is usually placed on the roof of the room. The interconnect cable may be installed on clamps. In this case, the power supply unit with the expander must be located near the module. Indoor units may only be installed via splitters. For this, additional networks will have to be laid. For fixing indoor unit racks are installed on the wall. Remote valves must be located behind the splitters.

Feedback on devices for two indoor units

Multizone systems for two blocks receive positive feedback from customers. According to consumers, modern models are able to easily maintain the temperature in a house up to 150 square meters. meters. The cooling capacity coefficient for modifications reaches 10 BTU.

It is also worth noting that there are many devices on the market with filters that do not dry the air. The energy consumption indicator for multi-zone systems of this type does not exceed 340 watts. Dehumidifiers are used with and without a control unit. The installation height of the line may vary from manufacturer to manufacturer. The efficiency coefficient for systems of this type starts from 80%.

Devices with three indoor units

Central air conditioning systems for three indoor units are usually installed with several modules. Filters in devices are used in different protection classes. Modern models are distinguished not only by a high coefficient of efficiency, but also by a powerful fan. Compressors are used for 2 or 5 kW. At the same time, their operating frequency is 45 Hz.

Many air conditioning systems are manufactured with protected lines. Distributors are installed, as a rule, with control units. The noise level of the models is about 75 dB. Infrared remote controls are often used to control the temperature. Sensors for multi-zone systems are of the built-in type. Power supplies are available for 230 V. Many buyers find these devices effective, but they are expensive.

Systems for five blocks

A five-block multi-zone air conditioning system is distinguished by high power. The description of devices should begin with a list of indicators. Their efficiency ratio is at the level of 85%. It is also worth noting that the models have several modules. Distributors can be installed with or without converters. Some experts say that the models are difficult to install.

Each indoor unit needs a separate expander. The service area of devices is 120 cubic meters. meters per hour. Filters for models are used with protection systems. There are many modifications of the multi-zone type with built-in sensors on the market. Their cooling capacity parameter starts at 35 BTU. Fans are used in different diameters. In this case, much depends on the power of the equipment.

VRV Plus device reviews

Systems with VRV Plus technology are very popular. As a rule, modifications to two indoor units are presented on the market. Their cooling capacity starts from 30 BTU. Many models are able to boast of high-quality blocks that operate in an economical mode. Modules in devices are used with interlocks.

Models are great for panel houses. Power supplies are used for 200 V, and the operating frequency is on average 40 Hz. Fans are used with powerful compressors. The coolers in this case are controlled by the central unit. Highways are allowed to be installed at a height of about two meters. Many models work from several modules.

Models with VRF technology

The multi-zone air conditioning system with VRF technology is produced with two or three units. The efficiency index of the models is very high. According to customer reviews, the devices are easy to operate. To connect the blocks, an expander is required. The modules of the systems will be used only of the wired type. Power supplies for them are selected for 220 V. The operating frequency for multi-zone type systems is on average 45 Hz. The fans usually run directly through the compressors. The optimal height of the indoor unit is 1.8 meters.

Some air conditioning systems are made with sensors. They operate from modules that are connected to a central control unit. The outdoor unit of the multi-zone air conditioning system can be installed on the roof. Models of this type are great for warehouses. they have 4 kW. The lines are used with and without an ionizer. Dehumidifiers are installed mainly near the module.

3 kW models

A 3 kW multi-zone air conditioning system is usually produced with three indoor units. The average cooling area is about 220 square meters. meters. Some modifications have several compressors. The indoor units are installed behind the expanders. Models with a 200 W power supply are capable of maintaining an operating frequency of 45 Hz. They use Freon can be used in different classes.

Modern air conditioning systems operate from a duct module. In this case, the temperature is adjusted directly through the remotes. The installation of the line is carried out with the help of clamps. Indoor units may be installed at a low height. In this beam, much depends on the manufacturer of the system.

5 kW devices

The 5 kW multi-zone air conditioning system has a high cooling capacity parameter. Expanders in this case are suitable only with adapters. If we talk about the shortcomings, then you should remember the high noise level. Also, models of this type do not allow a high line drop. There is a large load on the outer block. It is also worth noting that the sensors in the models are used only of the built-in type.

If we consider devices for three indoor units, then their efficiency coefficient does not exceed 65%. Many models are used with contact expanders that are controlled by modules. Dryers are very rare. The thermal performance index is at the level of 35 BTU. There are many air conditioning systems on the market that can operate at a frequency of 55 Hz, and the power supplies for them are selected for 200 V. The energy consumption indicator for multi-zone type models, as a rule, is in the region of 340 watts.

10 kW models

A 10 kW multi-zone air conditioning system can operate from several modules. According to customer reviews, the models are great for office space. The cooling capacity factor is 30 BTU. In this case, the frequency of the systems is about 45 Hz. Some models are produced with two compressors. Thus, a powerful fan is installed in the indoor unit.

Ionizers are found only in modern modifications. Their noise level is 60 dB. If we consider devices for three blocks, then they have two modules. Splitters are installed with or without expanders. Indoor blocks are often made with filters. Remote valves are allowed to be mounted through the central line. To remove freon, an interconnect type cable is used.

The HVAC segment is constantly expanding and is divided into narrower niches. Manufacturers are moving away from universal systems, replacing them with more productive and easy-to-use analogues. This is how specialized devices for humidification, air purification, ozonation and other functions appear. The main direction of development, which improves traditional air conditioners, remains relevant, although not all technologies survive in this group. Promising developments include VRV systems, which entered the market more than 20 years ago, but even today do not have a worthy alternative in the climate equipment market.

Features of multizone air conditioning

In essence, the hardware components for a VRV system do not offer anything fundamentally new. The design is made by the same block with the compressor which is applied and in monoblock systems. Technological features are associated with the approach to the placement of the elements of the complex and the nature of the interaction between them. But first, you should consider the operational differences that a VRV air conditioning system has. What is this system from the point of view of the consumer? This is a complex multi-zone complex that allows you to control the microclimate in several rooms. Theoretically, this configuration is suitable for both office space and industrial facilities. In practice, this development is mainly used in the arrangement public buildings and shopping centers.

What is the difference between VRV and split system?

One of the most notable features of VRV technology is the ability to service multiple execution units with a single outdoor unit. But the classic split system has the same advantage. You can say this common feature combining two concepts. But even here, not everything is clear, since the indoor unit of the VRV system can be represented by dozens of elements. In practice, there are about 40 segments located in different parts building. A split system is also capable of providing an object with the same number of executive modules, but this will be irrational in terms of energy consumption. For such systems, the number of indoor units usually does not exceed 8 elements - this is the best option for country house but not for a large shopping mall. But there is another feature of VRV technology. The fact is that the outdoor unit provides for the possibility of power regulation, that is, it can control the state

System design

At the very first stages, specialists calculate the parameters of the refnet and the route for laying pipelines in the conditions of a particular facility. In developing design solution the optimal indicators of the microclimate, the parameters of cold and heat loads for each room are taken into account. With the help of special programs, energy consumption is also calculated and an optimal model of thermal regimes is formed. Next, a schematic configuration is drawn up, according to which the VRV air conditioning system will be integrated - what does this mean in terms of documentary presentation? To date, traditional sets of technical documentation with graphs and drawings are still common, after reading which the future user approves or makes adjustments to the project. However, climate equipment manufacturers, understanding the complexity of multi-zone systems, offer automated design systems in the form of software. Such systems allow, by entering initial data, to calculate and design the optimal system, selecting the most suitable equipment for it.

Installation of VRV systems

It has already been noted that such a system can include about 40 blocks. However, industrial modern ones provide for the presence of 100 modules. Moreover, advanced complexes allow the possibility of connecting several bundles into one network, eventually forming a chain of 250 or more links. Accordingly, installation is carried out only by highly qualified specialists using self-diagnostic systems that detect errors during installation. The direct installation of each unit individually is carried out in the same way as in the case of conventional systems. That is, the outdoor unit of the VRV system is fixed to the wall from the side of the street by means of dowels and a load-bearing frame. The indoor module is also mounted in the room itself, after which a route is laid between the two components, along which the refrigerant with air flows will pass.

Maintenance of VRV systems

The technological complexity of the equipment necessitates regular maintenance activities. As practice shows, such actions help not only to increase the operational life of systems several times, but also have a positive effect on reducing energy consumption. So, maintenance of VRV systems includes performing inspection activities, replacing and replenishing consumables, as well as adjusting operating parameters. As for the check, this stage covers the revision of the functioning of the fans, the drainage complex, the tightness of the blocks, etc. Upgrading consumables include replacing filters and refilling refrigerant. At the final stage, the working components of the system are calibrated, temperature conditions are adjusted, and, if necessary, the automatic operation mode is corrected.

System manufacturers

There are not as many manufacturers in the VRV-systems segment as in the case of conventional air conditioners. Daikin is considered the leader in the class, the developers of which at one time became the authors of the concept. On the this moment the manufacturer is already producing the third generation of such equipment, expanding its functionality, improving ergonomics and reliability. Toshiba's multi-zone VRV systems also demonstrate their features. In particular, the company is working on optimizing the communication schemes between the units, successfully increasing the performance for outdoor units, and is at the forefront in the development of intelligent refrigerant control systems. Mitsubishi offers are also interesting. The models of this company are distinguished by advanced control systems with infrared remotes, centralized panels, as well as individual wired controllers.

Positive feedback about VRV systems

The main advantage of the system lies in the overall optimization of the cost of equipment, reducing installation costs and minimizing the cost of subsequent maintenance of air conditioners. Although from the outside, the installation of a multi-zone complex complex seems rather problematic and even unrealizable, in practice, the owners note that all initial labor and financial investments pay off in full. This is especially noticeable when comparing VRV systems with the same split units, which take up more space, require additional space for communications and are generally more expensive.

Negative Feedback

Of course, many users are scared away by the subtleties of design work and the nuances Maintenance. As the owners note, budget solutions of this type are especially whimsical in terms of content, and, most importantly, the blocks in them depend on each other. Therefore, it is recommended to purchase more technological kits, but they are more expensive. In addition, it is not always advisable to install VRV systems in truncated versions - that is, to use for private houses and apartments, even with several installation points for indoor units. For such purposes, manufacturers offer traditional split systems, which are less developed functionally and technologically.

Conclusion

VRV air conditioning technologies in many ways resemble the practice of using alternative energy sources. IN long term they promise many benefits, including minimizing the financial cost of electricity consumption. But, as with solar panels, VRV systems require a significant upfront investment. And this applies not only to financial expenses. Almost every project of this kind can be characterized as large-scale. Even objects for which 30-40 air conditioning units are supposed to be installed require qualified and responsible work to create technical solution and no less complex assembly operations.

Multi-zone, VRV or VRF, air conditioning systems are designed for a comprehensive solution of air ventilation problems in several rooms at the same time, where indoor units can be controlled both individually and centrally. For high-quality work, it is important to properly install a multi-zone air conditioning system, which will allow you to independently regulate the temperature and other microclimate parameters in each individual room, which distinguishes these air conditioning systems from others by higher energy efficiency.

Installation of VRF systems is designed to create a microclimate in the following rooms:

office and administrative buildings; business centers;
luxury apartments, country houses, cottages;
hotels and other similar establishments;
industrial, manufacturing and storage facilities;
shopping centers and hypermarkets;
fitness clubs and gyms;
cafes, restaurants, etc.

Installation of a multizone system is a clear set of works on fixing the outdoor unit and connecting it with the indoor ones. At the same time, the installation of the internal blocks of the system is carried out depending on the type: floor-to-ceiling and wall-mounted blocks are installed on the wall of the room, cassette and channel - in the ceiling area. The number of indoor units depends on the number of rooms where the VRF needs to be installed. Their installation is carried out in such a way that uniform supply and distribution of air is observed at facilities with a large number of rooms where different heat loads are required. Installation of VRF systems is carried out in accordance with the technical features of the building and the wishes of the customer. Different installation methods allow you to meet any requirements for the interior and microclimate of the premises.

Features of installation of VRF systems, tasks and errors

Installation of a multi-zone system is a labor-intensive process that requires professional skills and abilities from the specialists performing the installation work, who must have the appropriate qualifications. Work on the installation of VRV or VRF systems can be divided into several stages.

The first stage is drafting a project. This allows you to avoid errors during the installation of a multi-zone air conditioning system. The final result of the work depends on a quality project, i.e. optimal indoor climate.

Of the mistakes encountered in practice our specialists, when correcting poor-quality installation, we can list the following:

the use of incompatible equipment and non-compliance with the manufacturer's technological regulations when designing systems, often new blocks are added to the system, as they say "on the fly", the laying places, lengths and diameters of the refrigerant pipes are changed. Unfortunately, this happens quite often, so the Customer receives a non-working or malfunctioning system, and is forced to turn to specialists to correct the situation;
non-compliance of the project with the real conditions of placement. When one project is used on several objects, without data adjustment. This happens if, in order to "save" the project is developed without surveying the facility on which it is planned to carry out the installation of VRV systems. Then there are situations when it is impossible to place equipment in the places provided for by the project, for example, the location of outdoor units on the roof on which it is impossible, or it is extremely difficult to make support structures for the location of outdoor units of VRV systems, or there is no possibility to lay interunit communications, and the refrigerant and drainage routes turn out to be longer than calculated, which in turn shifts the installation of indoor units....

All these issues are best resolved before the installation work. Due to the complexity of the installation of multi-zone systems, the work on the project should be carried out only by highly qualified personnel. The engineer supervising the execution of works at the customer's site must have experience in performing these works and be able to identify and eliminate errors on time. preparatory stage. This allows you to save money and time allotted for the production of work on the installation of climate control systems.

The second stage is the actual installation work itself. At this stage of the installation of VRV systems, it is necessary to strictly follow the technological regulations of the equipment manufacturer. In addition, the company conducting the work must pay due attention to labor protection measures and fire prevention measures. (The installation of the refrigerant paths is carried out by soldering with open flame torches, and the electrical wiring is electrically connected.)

The installation of a multizone system is a complex of well-planned work on fixing the outdoor unit and connecting it to the indoor ones. Installation of internal blocks of the system is carried out depending on their type. For example, floor-to-ceiling and wall-mounted units are installed on the wall of the room, cassette and channel units - in the ceiling area. The number of indoor units will depend on the number of rooms in which the VRF needs to be installed. Their installation must be carried out in such a way that there are no obstacles to the air supply and it is distributed evenly. Outdoor unit, depending on the project and decision, can be installed on the roof, in the basement or industrial premises, on the technical floor, as well as at a distance from the building. When installing VRF systems, in particular the outdoor unit, a special vibration-damping base (foundation) is required. The maximum distance between the outdoor and indoor units, or in other words, the length freon route, can reach 100 m. At the same time, the vertical distance (height difference) between them should be no more than 50 m. From the foregoing, we can conclude that the installation of VRF systems belongs to the category of complex professional works and therefore requires highly qualified specialists.

The operation of a multi-zone air conditioning system directly depends on the quality of the installation, the equipment and tools used, components and consumables.

Installation of the VRF system includes the following procedure:

Installation combines outdoor and indoor units, dispatching and control modules, refnets, freon pipeline and other elements.

Installation of freon lines - a pipeline is laid at the facility to circulate the refrigerant. The pipe diameter is determined by the project documentation. From correct installation freon highways depend on the operating costs of the system. In parallel with the laying of freon lines, the installation of signal and power interconnect cables is carried out. When installing the pipeline, it is necessary to observe safety precautions and fire safety, because. soldering is used and work is carried out with open fire.
Checking and testing freon lines - after installing refnets, it is imperative to check the entire freon pipeline for tightness. To do this, the system is ringed and nitrogen is pumped into the circuit under high pressure. For accurate diagnosis, it is necessary that the entire system be in this state for two weeks.
Installation of indoor units- indoor units of floor-ceiling or wall-mounted type are fixed on the partitions of the room, and devices of cassette or duct type are placed in the zone of the sub-ceiling space. Incorrect installation of indoor units may lead to leakage of drainage or failure of the internal devices of the unit.
Control system installation - installation of individual control panels for the operation of each indoor unit, as well as installation of a central control and system control console.
Installation of drainage systems - It is designed to drain the condensate formed during the operation of the system from the indoor units. drainage system connects, through a siphon, to an existing household sewer or is diverted to a storm sewer system.
Installing the outdoor unit - equipment can be placed in the courtyard of the building, installed on the roof or in a separate room. The outdoor unit is mounted on a base with a vibration-damping foundation. The installation location of the unit is determined by the design plan, taking into account the space for subsequent maintenance of the unit.
Freon pipeline rolling- after the outdoor and indoor units are installed, it is necessary to connect the freon pipeline to the units, combining the refrigerant pipeline into a single route.
Electrical connection - installation of addressing installation in automatic or river modes. Automatic mode is used when setting addresses for a small system, and manual mode is used for VRF systems with a central console.
System sealing- checking the system for tightness is designed to detect possible leaks in the freon pipeline system, as well as rolling joints. If the installation of multi-zone systems takes place in several stages, it is necessary to check the system under positive pressure within two weeks.
Vacuum system- after connecting all the elements of the VRF system, non-condensable substances and moisture / air are removed from the system, (vacuuming) on the gas and liquid lines at the same time. Vacuuming is carried out through the service ports using a vacuum compressor.
Checking the refrigerant, topping up- if the check reveals a lack of refrigerant, freon is recharged according to a special calculation that was performed at the design stage before installation of the VRV and VRF multizone systems or according to the technical parameters of the system.
Dispatching - control panels, consoles and gateways are connected, as well as the installation and configuration of an intelligent control system.
Commissioning works - test run and commissioning of the system, a final check of the operability of the system is carried out and diagnostics of all parameters is carried out. After a successful check, the VRF system is handed over to the Customer and the Commissioning Certificate is signed.

It is important to note that the installation of multi-zone systems does not violate the principle of operation of an enterprise and does not require changes in the workflow. All work within the stages VRF installations systems are manufactured according to safety requirements using professional tools and equipment.

Errors encountered during the installation of VRF and VRV systems

During electrical work. Ideally, all indoor units of one VRV system should be switched on from one machine, and if it is impossible to do this in practice, it is necessary to exclude the possibility of supplying power from one machine to the indoor units of different (neighboring) VRV systems, this can create problems during commissioning and operation .
Mistakes in the work of laying refrigerant paths during the installation of VRV systems lead to high costs for their elimination and often lead to fatal consequences for the entire VRV system. During installation copper pipes and refnets, there are cases of using thin-walled copper pipes, or low-quality solder - which leads to a violation of sealing.
Of the most common installation errors, it should be noted such as soldering copper pipes without nitrogen, which leads to the formation of scale on the surfaces to be soldered, creases of copper pipes when they are bent, poor flaring when performing connection work copper pipelines with indoor units, non-compliance with the diameters of pipelines and their lengths provided for by the project.
During commissioning, refrigerant charging must be performed after the outdoor unit of the VRV system is energized and has been energized for at least 6 hours, this is done to eliminate the possibility of refrigerant accumulation in the compressor in the liquid phase, and in case of non-compliance of this rule, water hammer may occur at the time of starting the VRV system and, as a result, this will cause damage to the compressor. The final stage of adjustment is a trial run of the VRV system. If this procedure is not followed, the VRV system will generate a U3 error when turned on and the system cannot be used....

In our company "OVK Engineering", VRF installation is carried out only by qualified employees who have undergone special training and have many years of experience. They will help calculate the cost of installing the VRF system and select all the necessary components based on the specifics of each particular room.

No. p / p	Name of works	Unit rev.	Cost, rub
1	Laying of copper pipes with soldering
2	42	m.p.	621,00
3	35	m.p.	486,00
4	28	m.p.	418,50
5	25	m.p.	351,00
6	22	m.p.	300,00
7	19	m.p.	250,00
8	16	m.p.	180,00
9	12	m.p.	150,00
10	9	m.p.	120,00
11	6	m.p.	90,00
12	Insulation of copper freon pipelines with pipe thermal insulation up to f42	m.p.	100,00
13	Warming of copper freon pipelines with pipe thermal insulation from f42	m.p.	150,00
14	Refnet splitter kit	PCS.	6500,00
15	Installation of indoor cassette/duct type	PCS.	from 9500
16	Mounting the wall-mounted indoor unit	PCS.	from 10500
17	Installation of the plenum of the channel unit	PCS.	from 1350
18	Mounting remote control wired	PCS.	1200,00
19	Flow pump installation	PCS.	1600,00
20	Bulk pump installation	PCS.	1600,00
21	Control cable in PVC corrugation	m.p.	120,00
22	Corrugated interconnect cable	m.p.	120,00
23	Installation of the outdoor unit (soldering, power supply, interconnection)	PCS.	from 18000
24	System pressure test	system	from 6000
25	Vacuum system	system	from 8100
26	Commissioning works	system	from 19500

All prices indicated below are basic for the Objects located in Moscow and Moscow Region.

The cost of the work does not include rigging.

The cost of work does not take into account increasing coefficients for work on weekends and holidays, as well as night work.

Prices for other types of work are subject to additional agreement.

A flexible system of discounts is provided depending on the scope of work.

Air conditioner brands we work with

VRV and VRF air conditioning systems are installed in semi-industrial and industrial facilities for various purposes, as well as in administrative, commercial and other buildings. They serve for air conditioning in several dozen rooms at once, while allowing you to maintain a different temperature in each individual room.

The installation of such equipment is a complex of complex works that require special skills, high precision and professionalism. Installation must be carried out in strict accordance with the requirements of the equipment manufacturers.

Benefits of using

VRV and VRF systems are very convenient and practical. The use of such systems has a number of outstanding advantages, such as:

energy saving- a special inverter three-pipe system allows you to simultaneously work both for cooling and heating of premises with one external unit, while having efficiency factors up to 6.5, i.e. for 1 kW of energy expended, we get 6.5 times more cold;
space saving- the units of such air conditioners are very compact;
variety of options equipment - allows installation taking into account the features of any layout and over long distances;
ease of use– the control system is intuitive and consists of both controllers and consoles, it is possible to connect to the system " smart House»;
reliability– air conditioners have the function of self-diagnosis, system recovery and can work independently of each other.

Indoor units vrf air conditioning system can be various kinds, each of which is mounted individually depending on design features premises. So you can choose between cassette, wall, duct or universal units.

Here you can order services for the installation of VRV and VRF air conditioning systems, as well as their design and system maintenance. Specialists of OveCon-Engineering LLC will quickly and efficiently perform work of any complexity, taking into account all standards and requirements.