The 2-room multi-split system with one outdoor unit is an inverter technology with high productivity. The device operates silently and comes with a 10-year warranty.
Types of multisplit systems
The multisplit system differs in the method of connecting devices: up to 16 indoor units of different capacities can be connected to one outdoor unit at once. This allows you to simultaneously cool or heat the air in different rooms, depending on their independent purpose.
There are two categories of multi-split systems: fixed and type-setting.
Stationary MSS include one outdoor unit and several indoor units. The number of connection connectors on an external device is equal to the number of internal ones. The outdoor unit of a multi-split system for 2 rooms is equipped with one or two compressors. In the latter case, the room modules can be turned on for cold and heat at the same time, since they have different circuits. If the systems have one compressor, the modules inside work in a single mode. Each of them has a remote control (RC), which is the same for all devices.
Type-setting multisplit systemsconsist of one outdoor unit and several indoor units. They are connected using separators. It is possible to install three compressors in an external unit, involved in one circuit. All indoor units operate in a specific mode: cold, warm or dry. Internal modules are connected with the condition that their total power does not exceed the performance of the external device.
Indoor unit types:
- wall-mounted;
- cassette;
- floor and ceiling;
- console.
All multisplits are equipped with consoles, each of them is configured when setting up equipment. The first DP-system has a privileged right and can control the entire system, creating a common task for the internal modules. For example, if the "cold" mode is created on one block, then it will automatically be extended to other modules.
Advantages and disadvantages
Multi-split systems for 3 rooms are actively used to create the desired temperature in rooms of different areas. They can be used for heating rooms and for cooling, depending on the outside temperature.
Compared to conventional air conditioners, split systems for 3 rooms have the following advantages:
- External device power. Modules with increased performance are installed at MCC, allowing air exchange in large rooms.
- Quiet operation. Achieved by means of a remote compressor, which is quite noisy.
- Big choice. Modules differ from simple air conditioners in appearance, shape, size, fastening (ceiling, wall, floor).
- Installation of one outdoor unit. When there is no place on the facade of the building for the installation of several devices, the use of a multi-split system is justified.
Disadvantages of the device:
- Complex installation of modules. For the equipment of the channel complex, it is necessary to conduct communications connecting the outdoor device and room nodes, as well as air ducts.
- Installation of a split system with two indoor units can only be permanent. It is impossible to move and rearrange them to another place. It is possible to dismantle such equipment, but it must be done by specialists.
- If an outdoor unit breaks down, all rooms are left without air conditioning.
System complete set
The MCC includes:
- External block. Installed from the outside of the building.
- Communication distributors: power mains, air ducts, pipes with freon inside, combining the external and room modules into a single complex.
- Room modules.
Basically, the air conditioner for 2 rooms with one outdoor unit is equipped with inverter compressors and is combined with indoor modules of different types and capacities. Both all internal nodes and their categories or a separate block can work synchronously.
The use of the inverter modification of the multi-split system air conditioner significantly saves energy, since the capacity of the outdoor unit is regulated depending on the load.
Power selection
When calculating the performance of a multisplit system, several factors must be taken into account:
- Rooms in which a multi split system will be installed: area, purpose of the room, heating system.
- Indoor units power. Their total capacity must not be allowed to exceed the capacity of the outdoor unit. There are online services to calculate this indicator.
- Pipeline length. The higher this indicator, the more powerful the blocks in remote rooms should be.
Among the low-cost multisplit air conditioners, manufacturers can be distinguished: LG, General Climate, Midea. Sets of multi-split systems for 4 rooms have already been distributed in terms of capacity. One outdoor unit can cool eight rooms with a total area of up to 200 sq. m.
When choosing a multi-split system, you need to take into account the placement of the modules: on the floor, wall or ceiling.
MCC mounting methods
Installation of a multi-split system for 4 rooms is done in two ways: "slim" and "twin".
"Slim" provides for the connection of all indoor modules into a single circuit, and it, in turn, is connected to one port of the outdoor device. It turns out a common network, while independent internal modules have been created, which are switched on from separate consoles.
Twin means connecting each indoor unit with a separate trunk to a specific port.
The total length of all pipelines can be up to 55 meters, and up to the indoor module - 15 meters.
Installing a multisplit system
The outdoor unit is always placed on the outside of the house: on the wall or roof, sometimes in common passages or corridors. Each room has a separate module.
Refrigerant piping and power and control cables are installed between the indoor units. The outdoor unit contains a compressor, a condenser, a fan and ancillary equipment.
The installation process includes:
- fixing the outdoor unit;
- conducting electrical wiring;
- preparation of communication;
- installation of pipes;
- installation of cables;
- filling the line with freon;
- testing the split system for leaks.
When installing the external and internal modules, choose a place so that when drilling holes it does not get into the fittings. It is recommended to use a metal detector for this. If you plan to install the air conditioner on the roof, you need to calculate the permissible roof loads.
The obvious advantage of MCC is the presence of only one outdoor unit, especially when there is no room for several models. A competent installation will ensure the efficiency and durability of the device and create an optimal microclimate in the room.
