Outdoor unit split system. What can we offer

Updated: 10-04-2019

Multi-split system - great choice for offices, shops, private houses and large apartments, in which there is a need for air conditioning in several rooms at once. Such climatic equipment differs from conventional wall-mounted air conditioners in that here several indoor units, separated into different rooms, are simultaneously connected to one external unit with an inverter compressor. This allows not to clutter up the facade of the building and maintain a comfortable microclimate throughout the facility.

Peculiarities

The advantages of multi-split air conditioning systems include the following:

Preservation of the aesthetics of the facade of the building
Ease of operation and ease of maintenance
Ability to use different indoor units
Wide range of mounting options
Low level noise due to the presence of only one source
Savings on electrical work
High energy efficiency
Application versatility

Modern inverter multi split systems can work for cooling and heating, they are reliable and functional.

What can we offer

In "Climavent" you can buy a multi-split system on excellent terms. We offer climate control equipment from the world's leading brands, provide an official guarantee, perform installation of any level of complexity in Moscow and the Moscow region, and deliver equipment throughout Russia. You can place an order from the catalog on the website, through a consultant or by phone. There are several reasons why you should contact the Climavent online store.

The indoor unit of a split system performs the main task of an air conditioner - it cools the air in the room. Structurally includes:

housing with shutters

radiator (evaporator);

a fan with an electric motor;

· electronic control unit;

water drainage system.

Additionally, inside the case are air filters and a container for collecting moisture.

Depending on the version, indoor units are wall-mounted or floor-mounted. As an option - universal, that is, they can be attached to the wall or installed on the floor.

A feature of modern indoor units is the antibacterial coating of the surface of the evaporator.

Advantages and Features

One of the significant advantages of split systems is their compactness. The indoor unit of the air conditioner takes up little space and fits nicely into the interior of any room.

The air conditioner can operate in cooling, dehumidifying and heating modes. Such versatility is especially useful in the cold season when the central heating does not work.

Configuration and operation of the split system is carried out using the remote control. If necessary, the air conditioner operates automatically.

Special coating protects all metal surfaces from corrosion indoor unit.

Additional functions of the indoor unit

Each modern indoor unit of the air conditioner has additional functions:

· the accelerated mode of creation of a microclimate;

protection against icing of the evaporator;

· energy saving;

night mode of operation of the device;

settings memory;

Eternal (washable) filters.

You can buy the indoor unit of the air conditioner separately in our online store. When choosing a product, the manager will tell you in detail about all the functionality and help you choose exactly the device that will fully provide a comfortable microclimate in your room.

Today, to maintain a favorable microclimate in the premises, split systems are popular. They consist of two parts: external and internal block. The outdoor unit of the air conditioner is the key to quality work equipment. We will understand its device, principles of operation and features of installation and maintenance.

Equipment device

The external unit of the split system is called the compressor and condenser unit (KKB). This is a key element of climate equipment that provides cooling or heating by changing the state of the refrigerant (working substance). KKB is a building that houses:

compressor;
condenser (heat exchanger);
expansion coils;
capillary tubes;
4 way valve;
filter dryer (receiver);
fan.

The outdoor unit of the air conditioner is connected to the equipment in the room through a system of freon (heat-insulating copper) lines. A drainage line runs from the indoor unit to the outdoor unit.

The KKB case is made of galvanized steel.

Equipment features

A number of KKB models are equipped with a special "winter kit". It is designed to keep the instrument in good working order. winter time years at low temperatures. The winter kit works only for cooling, so it is best suited for installation in server rooms and other rooms with a high level of heat dissipation.

It includes the following elements:

The fan control controller turns off the ventilation and turns it on when the condenser heats up.
Heated drain pipe.
Compressor crankcase heating before start.

The general principle of operation of a split system can be described as follows: warm air is removed from the room and removed to the street, cooled air is supplied in the opposite direction, which loses temperature, passing through the air conditioner and in contact with the refrigerant.

When switching the split system mode to heating, the reverse process occurs. The outdoor unit takes in cold air from outside and raises the temperature to the desired level. The indoor unit delivers heated air into the room.

KKB works at the expense of physical properties refrigerant that transfers energy when the state of aggregation changes.

The outdoor unit of the air conditioner works as follows:

From the container, the compressor is supplied with a working substance in a gaseous state.
From the compressor under high pressure, the refrigerant enters the condenser, where it turns into a liquid, giving off heat.
Having lost some of the energy, freon enters the highway.
From the line, the working substance passes into the throttling device, where it loses pressure and cools.
Cold liquid is transferred to the evaporator, where it actively circulates through the tubes.
The evaporator is blown with warm supply air by means of a fan.
Cold air is supplied to the room.
The warm supply air heats the heat exchanger as it passes through it before it enters the room.
From the heat exchanger, the refrigerant is heated, which turns into a gas.
Freon, passing into a gaseous state, gives the air cold. From the heat exchanger, the gaseous refrigerant enters the compressor again, where the process is repeated.
A closed cycle of work is created.

Main settings

When choosing and buying an external unit of a split system, you need to pay attention to four main characteristics:

Size, height, width, length.
Power.
Line length.

Dimensional dimensions of external units depend on the power and functionality of the equipment.

Average dimensional characteristics of the outdoor unit of the split system:

width 80 cm;
height 50 cm;
thickness 30 cm.

Models that are offered on the market may have different capacities. It all depends on the purpose of the equipment. A standard household split system has a capacity that allows you to cover a space of up to 100 square meters. m.

An important characteristic of the outdoor unit is noise. If the air conditioner in the room works without noise, then the external unit can cause significant inconvenience to the neighbors. When choosing a model, it is better to clarify the indicator of the noise produced during the operation of the external unit. Permissible indicator 32 dB.

It is necessary to pay attention to the permissible length of the connecting lines between the blocks.

Do not exceed the distance that is stated in the technical data sheet of the model, as this can lead to a serious decrease in the efficiency of the equipment.

Installing an outdoor unit involves several steps. At the first stage, the installation site is determined, equipment and tools are prepared. At the second stage, the marking and direct fixation of the equipment is performed. At the third stage, performance verification and testing activities are carried out.

Location selection

Structures of modern buildings ( apartment buildings, shopping and office centers) provide for the installation of air conditioners and split systems. This moment is laid down during the design. Special boxes are mounted on the facades of buildings. They solve two key problems. First, it minimizes the likelihood that fasteners will be poorly made. Secondly, the boxes are harmoniously built into the design of the building and do not spoil its appearance.

If there are no boxes in the building, then the choice of location must be made taking into account the following factors.

General rules for choosing a place for an air conditioner:

The block is mounted on the wall adjacent to the apartment. You can not fix the device on the "territory of neighbors". Before starting work, it is necessary to clarify the possibility of installing air conditioners on the facade of the building. The city authorities may issue a decree according to which such work is prohibited, because it spoils the historical or cultural appearance of the building. There may be other reasons for the ban.
The optimal mounting locations are the space under the window, slightly below the window sill, and the place to the side of the window. This position will make it easier installation work and allow for easy maintenance.
If it is impossible to mount the block on the facade, you can install it inside an open balcony or loggia.

Mounting tool

Before starting work, be sure to prepare a set of tools. To install an outdoor unit, you will need:

perforator;
a drill for drilling a hole in the wall through which the highway will be laid;
drills for making holes for fixing brackets;
vacuum pump, which removes moisture and air from the freon circuit;
gauge manifold for connecting the refrigerant cylinder to the container in the unit;
a set of rolls that are needed for rolling copper tubes when connected to air conditioner valves;
pipe cutter for cutting copper pipes;
pipe bender for forming bends on tubes;
standard set wrenches, hexagons, screwdrivers, wire cutters, level gauge.

When installing, be sure to consider the following rules:

Availability of fresh air. It is impossible to mount the outdoor unit in a closed space without air access and or with its limited supply (glazed loggia). Such an error will lead to overheating and breakdown of the KKB.
During operation, you will periodically have to change the refrigerant. To do this, the valves must be located so that the master can freely and without risk replace them. For most models, the valve is located on the left side.
It is necessary to provide for competent drainage of condensate so that it does not fall on the walls, visor or sidewalk.
Fasteners must be mounted on supporting structures, which must be designed for a load of several tens of kilograms. You can not fix the brackets on the walls of aerated concrete, on the external decorative facing layer or on the insulation layer.
The distance from the wall to the unit should be at least 10 cm. This distance will allow ventilation and reduce the risk of overheating of the device. The distance from the wall to the inner wall of the unit must not be too large. It is impossible for direct sunlight to fall on the hidden wall of the block.
When laying connecting lines, a large number of bends should be avoided, since they will lead to a decrease in the required intensity of refrigerant movement, this will reduce the efficiency of the air conditioner.
It is recommended to equip a cornice that will protect the outdoor unit of the air conditioner from direct moisture.

Mounting to the wall is carried out using special brackets, which are usually included in the package. It has the form of a profile of various sections, bent at an angle of 90 degrees. It has several holes: one for fixing to the wall, the other for mounting the unit. The bearing capacity of the brackets exceeds the weight of the air conditioner by several times, so their use will ensure safety and reliability.

Installation process

Step-by-step instructions for installing an external air conditioner unit:

The location of the block on the wall, holes and channels for trunk lines are marked. The key parameters mentioned above are taken into account.
Holes are made in the wall for brackets.
A hole is made in the wall for communications. A box is laid in the hole, in which a freon and drainage line, electrical wiring are laid.
Brackets are attached. For their fixation, anchor bolts or dowels with "capercaillie" are used. The block is mounted on the brackets. It is fixed with bolts.
Strength, reliability and stability are tested.
Freon tubes are chamfered and flared. Tubes are connected to the block.
There are wires in the KKB. Their optimal length is measured, they are stripped and connected to terminal block. The connection of each wire is made in accordance with electric circuit, which must be attached to the technical data sheet of the device.
After installing the indoor unit, a vacuum pump is connected to the KKB, with the help of which air is dried and evacuated from the lines and internal elements of the unit.
A protective box is put on.
The refrigerant tank is filled with freon. A test launch of the equipment is carried out, the modes and correct operation are checked.

Breakdowns and malfunctions

Like any other device, outdoor unit the air conditioner may break down. At low temperatures in winter, the use of an air conditioner without a winter kit can lead to compressor failure. The external block under the influence of external natural factors is strongly cooled and freezes over. Under such conditions, freon cannot boil in the outdoor unit. Liquid refrigerant enters the compressor, which leads to its breakdown.

To avoid damage to the compressor from freezing of the outdoor unit, you should install a winter kit or use the device in accordance with the technical instructions: heat the room only in autumn and spring at positive outside temperatures.

Another possible view mechanical breakdowns - failure of the fan, which pumps air into the unit. The cause of premature wear of the fan may be the ingress of dirt and dust into the unit.

Malfunctions in the electronics are associated with the failure of the control and regulation boards. There may be problems with the integrity of electrical networks.

Maintenance and care

In normal operation, the outdoor unit requires a preventive maintenance inspection once every 6 months. The master inspects the fasteners, checks the integrity and level of contamination of the filters, specifies the amount of refrigerant and measures operating pressure networks.

The greatest difficulty in maintenance is the replacement of the working fluid.

The refrigerant is chemical, which poses a health hazard, so it is worth trusting a professional master to work with it. You can check the condition of the filters, remove dust and dirt yourself.

Greetings to all readers of the site "All about air conditioners". Today I will tell you what parts the indoor unit of a split system consists of, and why each of them is needed. We will also analyze the joint principle of operation of all these components.

Many of you know that there are several types of devices for various purposes in industry and everyday life. Each of them has its own design and features. To understand them, I have a separate article dedicated to. But today we will analyze the most common type of air conditioner in houses and apartments - a wall-mounted split system.

Details of the indoor unit of the wall-mounted split system

Evaporator (radiator)

As we know, the most important function of an air conditioner is to cool the room. Therefore, the main part of the indoor unit is the radiator (it is also an evaporator, it is also a heat exchanger). It is called an evaporator, because in the cooling mode, freon evaporates (boils) inside its tubes. Based on this process.

The size and shape of the evaporator largely determines the (cooling capacity) of the “split”. The more powerful the air conditioner, the larger its radiator should be. Such an element is a tube crossed by thin plates (similar to lamellas). Freon moves through the tubes at a certain temperature. And the plates increase the heat exchange surface area, which significantly affects its efficiency.

Manufacturers are improving (complicating) the shape of the radiator and its plates in every possible way. For simple wall models, this may be a straight small radiator, for other models this radiator may have complex shape occupying most of the body. Radiators of modern air conditioners have an antibacterial coating, which in some way prevents the reproduction of viruses. But since such trifles are not visible from the outside, almost no buyer pays attention to these things. But in vain!

Shaft (fan)

In order for the radiator to quickly and efficiently cool the room, it is necessary to “force” the air through it. This is helped by the shaft (aka fan, aka impeller), which creates air movement through the radiator and blows it into the room. This part of wall-mounted air conditioners is a drum with blades. The blades and the shaft itself are designed in such a way as to reduce the noise of its operation. For all wall-mounted air conditioners, it is located under the evaporator. In most models, the radiator, as it were, outlines the shape around the shaft. This design combines the most efficient heat transfer and ergonomics (allows you to make a compact indoor unit).

Motor (motor) shaft

The shaft of the indoor unit is driven by a motor. It is located to the right of the fan and is controlled by the board (I will write more about it below). The motor is fixed with a special casing to the block body.

Drainage tray (bath)

During operation of the air conditioner, condensation (water droplets) forms on the evaporator. In order to "collect" all this water, the so-called drainage tray is used (it's also a bath, it's also a pallet). For some air conditioners, it is connected to the body, but in most

designs it is removable. Together with moisture, all dust and pollution is collected in it. Therefore, it is much more convenient to flush and maintain this tray when it is detached from the body. The front lower part of the radiator, as it were, lies in this tray and the condensate from the radiator flows directly into the bath. Most often, water is brought out into the street through.

Horizontal and vertical blinds (blinds)

Any wall-mounted indoor unit has two types of curtains, with the help of which the direction of air flow is partially regulated. Horizontal blinds regulate the flow up and down. Behind them are vertical blinds representing several "petals". They regulate the flow from right to left. All these curtains are attached under the drainage tray. When servicing, they are removed together with the tray. They are driven by small motors.

Control unit (board) with sensors

In order to synchronize (coordinate) the work of all parts, a so-called control unit (the “brains” of the air conditioner) is located inside the case. They manage all nodes. This element is a board to which "power" is supplied. All wires, starting elements of engines and sensors are connected to it. This board is located on the right side of the indoor unit case.

The operation algorithm of this unit is guided by the indicators of temperature sensors, and issues commands to the main components of the air conditioner (compressor, fans and expansion valves), turning them on and off in a timely manner. Thus, the unit controls each element of the split system, maintaining the required temperature in the room.

Air and heatsink temperature sensors are the most important parts of the board. Their readings form the basis of the process of maintaining the exact temperature in the room.

Filters

An obligatory element of a modern air conditioner is its filters. They are located on top of the evaporator under the revision cover of the housing. Mesh filters "collect" the main part of the dust. They can be removed and washed very quickly, which allows you to keep the evaporator clean longer. In addition to mesh filters, many air conditioners are equipped with other filter elements. Some of them are able to effectively destroy bacteria and viruses - some eliminate odors, and some enrich oxygen with healthy particles.

Indoor unit housing

All of the listed parts are combined and hidden in a single housing. It represents an equally important detail, since in order to create modern interior can not do without a compact and spectacular design.

From the considered trifles, the quality of the final product is formed - in our case, the air conditioner. The more modern each detail, the more efficient, reliable and, accordingly, more expensive it is. V modern world very high competition between manufacturers. Therefore, each of them offers its own technical solutions for a certain price category. This is where I end the article. Leave your comments!

Structurally, the external unit of the split system consists of a compressor that compresses the refrigerant, a condenser that performs the task of cooling freon, and a 4-way valve (used in functional systems that can heat and cool rooms). In addition, it includes a fan that moves air and blows around the condenser, a control board and a system of fittings. Included in the design and a grill that protects the fixtures from getting inside insects and foreign objects. Since the compressor is located in the outdoor unit, this significantly reduces the noise level in the refrigerated room - it is about 24-26 dB.

How to choose an outdoor unit of a multi-split system?

The following parameters must be taken into account:

device dimensions. As a rule, the dimensions of the blocks are 80 x 50 x 30 centimeters;
power. It is selected in accordance with the serviced area of the premises;
noise level. It often happens that the air conditioner in the room is silent, but the outdoor unit is very buzzing. Permissible noise level - 33 dB.

The company's consultants will help you buy an external unit of a split system that is most suitable for the price and technical specifications and corresponding to technological needs.