Split Systems For 2 Rooms: Characteristics Of Multi-split Systems And Air Conditioners With One Outdoor Unit And Two Indoor Units

2024 Author: Beatrice Philips | [email protected]. Last modified: 2024-01-18 12:09

Modern climatic technology is in great demand. If you want to create a comfortable and healthy microclimate in your home, buying an air conditioner becomes a hot topic. Let's consider how to decide on the choice of high-quality equipment, and who is suitable for a multi-split system.

Pros and cons of using

Traditionally, when buying an air conditioner, a street module with a compressor is installed outside the building. The only indoor air conditioner is connected to it. If it is necessary to create an optimal microclimate not in one, but in several (2, 3, 5 and more) rooms, according to this logic, an external module will have to be brought out to each internal device on the outer wall of the building.

If you live in an individual household, then problems usually do not arise . The only obstacle is that the decorative facade, hung with a number of bulky blocks (even in special boxes), does not look very attractive.

For residents of city apartments, this option is often simply unacceptable. Housing regulations or legislation clearly limit the number of outdoor units that can be hung on building facades. This is usually one unit with limited dimensions. In some cases, for such purposes, a secluded corner is allotted on the technical floor or under the roof, in the niches of buildings . As a rule, the size of the seat does not exceed 0.6 by 1.5 m. In such a technically difficult situation, the only way out is to use a system with one street block and several internal ones working with it (from 2 or more depending on the number of rooms in the apartment).

The use of a multi-split system of the described type has both advantages and disadvantages. It is important to take into account all the nuances. Then the climatic technology will only delight with its work.

Let's start with the benefits

• The outdoor unit has great power and performance. Air exchange and the creation of an optimal microclimate can be carried out in rooms of various sizes.
• Low noise level during operation.
• An impressive range of indoor modules in various sizes and designs.
• Possibility of connecting to one outdoor module of internal elements in different versions.
• Independence of the choice of power of individual elements from the outdoor unit. The main thing is that in total it does not exceed the total capacity of this unit from the outside.
• The ability to create optimal conditions and climate in an apartment with a large number of rooms, when it is not possible to mount several separate modules on the wall of the building.

The disadvantages of this type of multi-split systems include a number of factors

• The complexity of equipment installation, requiring the involvement of specialists.
• Installation is carried out on an ongoing basis. It will be problematic to change the places of the modules in the future.
• If the outdoor unit breaks down (if the option with one compressor is selected), all rooms connected to it will remain without air conditioning.
• The impossibility of setting different modes (cooling / heating air) in separate rooms. The problem is solved by purchasing an external unit with several compressors.
• The high cost of equipment (in comparison with the purchase of conventional air conditioners and the proportional number of outdoor units) is obtained due to the use of innovative technologies in technically improved climate systems of this type.

Varieties

Modern multi-zone air conditioning systems (multi-split systems) are a set of equipment with one module for installation on the facade and two (or more) for installation in rooms, each of which is installed in a separate room. Conditioning takes place due to the operation of the inverter system, which is the most innovative . The devices use the latest developments in the field of climate control.

Equipment kits traditionally consist of a number of components

• External module. It is mounted externally on one of the walls of the building.
• Indoor units (2 pieces or more) for placement in rooms inside the house.
• A set of communications for combining and operating the elements of climatic equipment with each other.
• Control panels, one of which becomes the main one.

In this case, you can buy a ready-made kit from one manufacturer, or you can assemble it yourself from the necessary elements. Type-setting multi-split systems include several types of indoor units: wall, console, cassette and floor-to-ceiling. For apartments, wall or floor-ceiling indoor units are more often purchased.

There are also stationary multi-split systems with an outdoor unit equipped with two compressors . Such equipment can work by simultaneously heating the air in one of the rooms, and cooling in the other.

Equipment calculation

It is not difficult to make the necessary calculations for a multi-split system. You can handle it yourself. There are elementary formulas and average parameter values . For this, first of all, the power of the climatic equipment is determined based on the various parameters of the refrigerated room. The main one is the area of the rooms.

Conventionally for 10 sq. m calculate 1 kW of device power. This value is approximate, since other parameters of the conditioned space are also significant (ceiling height, the usual average number of people in the room, furniture, the presence of various sources of heat radiation).

The average calculation is most suitable for residential living quarters . For example, for a room within 20 square meters, an air conditioner with a power of 2 kW is suitable. If the room has a high ceiling, or there are additional large household appliances (plasma TV, refrigerator), then you should choose an air conditioner with a power reserve within 30%. The required power of the equipment will be equal to 2, 1-2, 3 kW.

The calculation of a multi-split system for a 2-room apartment is carried out in such a way that the sum of the capacities of the two indoor units does not exceed the capacity of the outdoor one.

For example: there are rooms with an area of 18 and 25 square meters . Accordingly, we choose for them air conditioner 1 - 2 kW and air conditioner 2 - 2, 6 kW. The sum of the capacities of the two indoor units will be 2 + 2, 6 = 4, 6 kW.

We select an external module with a capacity of at least 4.6 kW for reliable operation.

One should not deviate too much from this figure. A lower value will lead to malfunction of the entire system and damage to its devices. A large supply will make the operation of a multi-split system uneconomical.

Top Models

We offer some of the most popular models of different manufacturers for the installation of a multi-split system with one outdoor unit and two indoor units in a 2-room apartment.

• Mitsubishi SCM40ZJ-S / 2xSKM20ZSP-S . The device is highly reliable and works without unnecessary noise. The operating frequency can be adjusted over a wide range. High efficiency and acceptable parameters of the working outdoor temperature.
• General Climate 2XGC / GU-M2A18HRN1 . The representative of the inexpensive price segment has all the necessary functions. The main advantage is the outdoor temperature range for the device to operate.
• Panasonic CU-2E15PBD / 2-E7RKD . The world famous brand has released a model in the middle price segment. It is distinguished by its reliable operation and low noise level. Recommended for areas with relatively warm winters, with temperatures of at least -8 degrees Celsius.
• Electrolux EACO / I-14 FMI-2 / N3 х2 EACS / I-09HC . The advantage of this climatic technology is the compactness of the units and the precise regulation of the required temperature. Has an average range of working outdoor temperatures.
• Lessar LU-2HE14FMA2-MHE07KMA2 . An inexpensive option with an extended operating temperature range. The universal appearance of the internal modules will perfectly fit into any interior design.

Air conditioners made in Japan are traditionally considered the best in terms of reliability, build quality and durability. Daikin, Mitsubishi, Toshiba - these well-known brands are leaders among the manufacturers of multi-split systems. Initially, their cost may seem higher than their counterparts. But it will pay off due to a long and problem-free service life. This is noted not only by professionals, but also by buyers.

In the middle price category, you can look at the American manufacturer Carrier … According to reviews, the technique is optimal for installation in apartments and private houses. Multi-split systems with one external unit for a 2-room apartment of this company are distinguished by their ease of operation and high technical characteristics. The modules are also ergonomic and fairly compact.

How to choose?

An air conditioning system for 2 rooms is selected not only by the popularity and rating of the manufacturer. For reliable and efficient operation, individual elements must meet certain parameters.

Indoor units are selected by:

• power;
• a set of functions;
• the length of the connecting all elements of the communication system;
• design.

The outdoor unit is selected according to the total capacity of the two indoor units and the range of outdoor temperatures (their maximum and minimum values per year). And also it is worth deciding whether there is a need for a separate installation in each of the two rooms of heat / cold modes. If it is not there, then it is worth choosing a more economical option with one compressor.

In some cases, corrections are made for additional heat inflows in each of the rooms.

Installation recommendation

It is better to entrust the installation of expensive complex climatic equipment to professionals. Wherein it is worth familiarizing yourself with its main stages if you plan to purchase a multi-split system with a common outdoor unit for 2 rooms.

The outdoor unit is placed on an outside wall or roof. In this case, each room unit is located in the corresponding room. Pipes are laid between the internal elements. They contain the refrigerant, power supply wires and control cables.

The installation process itself usually includes the following steps:

• installation of a street block;
• installation of electrical wires;
• installation of communication systems;
• laying pipes;
• cabling;
• filling the line with refrigerant;
• checking the tightness of work;
• installation of indoor units;
• connection of all elements of the system;
• testing of equipment operation.

Correct installation of a multi-split system will ensure its efficient operation, as well as reliability and durability in operation.