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 in this case is located in a single line. 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 a 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 circulation occurs with the help of a fan, which is located in the 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. Racks are installed on the wall to fix the indoor unit. 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. Line installation height different manufacturers may differ. 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 efficiency factor, 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 applied different diameter. 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. outdoor unit 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 about high level noise. 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 models is usually around 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.

Multizone systems, or VRV systems, are inverter systems, which are great 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 retail 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. Because of their efficiency and Daikin's patented refrigerant oil return system to the compressor, the units VRV systems We quickly gained popularity 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;

Possibility to carry out installation work step by step.

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 outbuildings 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

Project VRV(VRF) system provides optimal selection equipment in accordance with the necessary 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 inspection of the object is carried out and its project documentation corresponding 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 at this stage is the "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. When preparing for installation work, it is necessary to take into account the fact of the risk of fire. 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. Connecting pipelines, signal and power cables requires precision work and the involvement of appropriately qualified specialists 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 an outdoor unit with a capacity of 12 kW and 4 indoor units of the EMURA series of 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 solder was already in the plastered wall with a clean finish, and to correct this mistake, 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 that you order equipment and installation only from companies that have a lot of experience in this area. This will not only help you avoid overpayments when correcting other people's mistakes, but also guarantee you a quality service.

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 quality work it is important to properly install a multi-zone air conditioning system, which will allow you to independently control 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 technical features buildings 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 work at the customer's site must have experience in performing these works and be able to identify and eliminate errors in time at the 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. The outdoor unit, depending on the project and the decision taken, can be installed on the roof, in the basement or production room, 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. Max distance between the outdoor and indoor units, or in other words, the length of the 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 complex professional work 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.

1. Installation of freon lines - a pipeline is laid at the facility to circulate the refrigerant. The pipe diameter is determined by the project documentation. The operating costs of the system depend on the correct installation of freon lines. 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.
2. 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.
3. Installation of indoor units- indoor units of floor-ceiling or wall-mounted type are fixed on the partitions of the room, and cassette or channel types placed in the area of ​​the subceiling space. Incorrect installation of indoor units may lead to leakage of drainage or failure of the internal devices of the unit.
4. Control system installation - installation of individual control panels for the operation of each indoor unit, as well as installation of the console central control and system control.
5. Installation of drainage systems - It is designed to drain the condensate formed during the operation of the system from the indoor units. The drainage system is connected, through a siphon, to an existing household sewer or discharged into a storm sewer system.
6. 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 block.
7. 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.
8. 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.
9. 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.
10. 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.
11. 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.
12. Dispatching - control panels, consoles and gateways are connected, as well as the installation and configuration of an intelligent control system.
13. Commissioning works- test run and commissioning of the system, a final check of the system performance 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. When installing copper pipes and refnets, there are cases of using thin-walled copper pipes, or low-quality solder - which leads to a seal failure.
• Of the most common installation errors, it is necessary to note such as soldering copper pipes without nitrogen, this leads to the formation of scale on the soldered surfaces, creases of copper pipes when they are bent, poor flaring when performing work on connecting copper pipelines to indoor units, non-compliance with the diameters of pipelines provided for by the project and their lengths.
• In the process commissioning, refrigerant charging should be done after the outdoor unit of the VRV system is energized and has been energized for at least 6 hours, this is to avoid the possibility of refrigerant accumulation in the compressor in the liquid phase, and if this rule is not observed, water hammer may occur in the moment of starting the VRV system and as a result this will cause a breakdown of 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.

Multi-zone air conditioners VRV and VRF are installed in buildings in which it is necessary to regulate temperature regimes in a variety of rooms. Installation is carried out in several stages. First, specialists study the project documentation to guarantee quality result installation work. It is necessary to choose the right equipment for VRV / VRF systems and comply with technological standards and requirements. It should be borne in mind that when designing multi-zone systems, the places for laying pipes, their length and diameter are often changed, new blocks are added.

Problems may arise due to the impossibility of laying the route for the movement of the refrigerant, interunit communications, and drainage. Sometimes it is not possible to install indoor units in the places provided by the project. Questions like these should be resolved before any installation work can begin.

At the second stage, installation work is carried out. Our specialists strictly comply with the technological requirements specified in the documentation for the equipment. Particular attention is paid to labor protection measures and fire prevention measures. The performance of such work requires the issuance of a work permit, the maintenance of a work log and a safety briefing log.

Installation of the refrigerant route of the VRV system

System installation includes several types of work. Our specialists produce electric installation work including the laying of power cables. The laying of signal and control cables is also carried out. The arrangement of the refrigerant route involves soldering pipelines, connecting copper pipes to outdoor and indoor units. The implementation of the drainage system requires skills and abilities from specialists.

Commissioning activities

After completing the installation and performing pressure testing of the pipeline, air must be removed from the system. The next step is food. From the outdoor unit, check the number of indoor units, if necessary, refuel the system.

The use of modern equipment implies the possibility of automatic refueling. At the same time, the amount of refrigerant to be charged should be monitored. If a discrepancy occurs, you must quickly identify the causes and fix the problem.

Starting the compressor equipment and refueling is carried out after applying voltage to the outdoor unit of the system. In this case, the supply voltage must be supplied at least 6 hours before the start of work. Otherwise, the refrigerant may accumulate in the compressor, and at the moment of switching on, a pressure surge will occur that can disable the compressor. At the final stage, a trial run of the VRV and VRF systems is performed.

Having completed the installation and commissioning of the equipment, our specialists perform testing of the system as a whole. After which it is handed over to the customer. Our clients receive acts of completed work, including hidden work. We also draw up acts of pressure testing and testing. All documents, including the scheme for the installation of equipment, are prepared in 2-3 copies (one remains in our company).

Installation prices

The price list for Volgograd is under development.

Installation and installation of VRV-systems is the most promising solution to the issue of air conditioning in buildings with a large number of rooms. Therefore, they are also called multizone systems. The main advantage of VRV systems is that from 2 to 100 indoor units can be connected to one outdoor unit various types. The Eco Systems company will professionally carry out the installation of VRV systems to solve your problems.

As you already understood, VRV systems compare favorably with split air conditioning systems. With their help, it is possible to air-condition office and shopping centers, administrative and residential buildings, large cottages. Installation of multizone systems requires the preparation of project documentation and careful calculation. Since the indoor units can vary (wall, duct, cassette, universal (floor-ceiling), depending on the characteristics of the premises or the economic preferences of the customer, their type is preliminarily discussed and agreed with the customer.

It is customary to distinguish the following stages of installation of VRV systems:

1. Installation of freon lines
This is a top priority for future work. After laying all the copper pipelines, refnets are soldered into the system - special freon distributors. Together with freon pipelines, signal and power interconnect cables are laid.

2. Checking freon pipelines
After soldering refnets, it is necessary to check the entire freon circuit for tightness. To do this, the system is looped and nitrogen is pumped into the circuit under high pressure. In this state, the system should be about two weeks. In this way, leaks and holes are revealed. If the nitrogen pressure in the system has not dropped within the allotted time, then the circuit is tight.

3. Installation of the drainage system
Drainage piping must be provided to drain condensate from indoor units. Drainage is usually diverted either to existing system sewers (mandatory through a siphon), or into a storm sewer system. In places where drainage is connected and siphons are installed, it is recommended to install inspection hatches.

4. Installation of indoor units
Depending on the type of indoor units, installation work may vary. Wall-mounted and floor-to-ceiling indoor units are mounted directly on the wall of the room, and duct and cassette units in the area of ​​the ceiling space.

5. Installing the outdoor unit
The outdoor unit can be mounted both on the roof of the facility and at ground level. It depends on the terms of reference and installation conditions of multizone systems. An indispensable condition for the installation of the outdoor unit is the presence of a mounting platform - a specially prepared foundation on a vibration damping base.

6. Rolling freon pipelines
After installation of the air conditioner, its indoor and outdoor units, freon pipelines are connected to the units. At the same time, all signal, information and power cables are connected.

7. Vacuum system
After connecting all the blocks, the system is once again checked for tightness. This time by pumping air out of the pipelines.

8. Refueling with freon
Usually, the factory filling with freon is not enough for the operation of the entire system. Therefore, in order for the system to work effectively, a special calculation is made, depending on the length of all freon pipelines. As a result, the required additional amount of gas is pumped into the system.

9. Commissioning
Trial run of the system, testing, configuration and debugging working system conditioning.
Most modern VRV systems are computer controlled and have a built-in self-diagnostic system. The presence of such control systems will significantly reduce the time of both commissioning and commissioning of the entire air conditioning system to production capacity. Therefore, if timing and the subsequent economic effect are important for your order, then we would recommend purchasing systems with similar control systems.
We also want your attention to the fact that the installation of the VRV system should be carried out at the construction stage or before the building is put into operation.

What is the list of the main characteristics that affect the cost of installing VRV systems?
. If the systems are used for buildings with a total area of ​​100,000 km. m.
. The number of VRV indoor units exceeds 100 units.
. Several VRV systems can be combined into one network with a total number of units up to 250.
. Distance between indoor units.
. When the outdoor unit is more than 100 meters away.
. If the height difference can be 50 meters.
. If the VRV installation provides for a sufficiently long route of freon pipelines.

It is for these reasons that qualified work of specialists is required. The cost of installing a VRV, according to rough estimates, is about 25% -30% of the cost of equipment. If, in the economic aspect, we compare the installation of VRV with the installation of a central air conditioning system, then VRV systems require less capital investments, because. within such decisions, there is always the possibility of a gradual increase common system conditioning. Those. it is not necessary to purchase and introduce all the necessary equipment at once. This factor is due to the modular principle of VRV systems. Since the installation of indoor units (air conditioners) does not affect the workflow in the office building in any way. An additional convenience is that VRV systems do not require special allocation of premises: external modules can be mounted on the roof of the building.

What should be considered when installing VRV systems?
. VRV system is an air conditioning system that works on huge areas. Therefore, the VRV architecture differs significantly from conventional multi-split systems. Here best solution during installation, there will be main pipes that have branching nodes in the required areas.
. VRV system air conditioners can be located very far from outdoor units, which allows you to install outdoor units even on the roof of the building or outside it. Hence, for the pipe route, the ideal solution is laying underground. Wherein outdoor unit can be installed outside the building.

What are the benefits of VRV systems?
. The very fact of the VRV system implies an individual approach to the air conditioning of each room. Those. every minute needs of each consumer are taken into account here. Such a system is ideal for facilities with high demands on the microclimate or with high indoor activity. Precise temperature control allows you to monitor changes in the air conditioning system and adjust its operation in order to economically maintain the required parameters for each user. Thus, the VRV system is the most effective complex for creating a microclimate in large areas.
. VRV air conditioners save energy. This is available thanks to special blocks with heat recovery. This modification allows the system to work simultaneously for both cooling and heating. different rooms. If we review VRF/VRV systems from different manufacturers, then VRV systems are leaders in the field of energy efficiency, as they are equipped with supply and exhaust ventilation with heat recovery. In general, the operation of a VRF / VRV system with an HRV is a good option, regardless of the manufacturer.
. Significant space savings. It is achieved by the fact that the VRV indoor units are compact, and the high length of the connecting communications allows you to remove the external modules of the system as much as possible.
. The VRV system operates over a wide temperature range. A number of systems are able to work already at -20ºС, and some highly specialized models - even up to -50ºС.
. Variety of design solutions: the length of the pipeline increases the flexibility of system design at a particular facility; the possibility of building the system after commissioning; the possibility of replacing old VRV indoor units in case of repair or redevelopment of premises; phased commissioning of the system.
. The operation of the VRV system is due to low noise characteristics, as well as the control system, which consists of control controllers and consoles.
. High reliability is expressed by such factors as: built-in self-diagnosis system; automatic restoration of work in the event of power outages; independent operation of VRV units. Those. failure of one unit will not lead to a stop of the entire system.
. Ease of installation: installation of blocks on each floor; putting the system into operation practically without the stage of commissioning