The server room is set aside for the installation of telecommunications equipment for storing and processing information. The data center has requirements for humidity and air temperature. The air conditioner is responsible for maintaining the optimal microclimate. The split system is not able to withstand the operating mode without shutdown around the clock. To ensure uninterrupted cooling of the room, redundant air conditioning units are installed. Controls their device for the rotation of air conditioners.
Purpose of the air conditioner rotation unit
To ensure standard climatic parameters, an air conditioner is installed in the server rooms. One device cannot guarantee uninterrupted cooling of the data center. In case of breakdown and servicing, reserve power is required. Installation of two or more air conditioners provides reliable protection against overheating of expensive equipment. Split systems operate in turn, turning on after a certain period of time. The sequence of their operation is controlled by the rotary air conditioner control unit.
The automatic device eliminates the need for human intervention. The coordinator of the operation of air conditioners turns them on and off at regular intervals. The procedure is carried out by changing the voltage supply. The control system is equipped with three temperature sensors: one is installed in the room, the other two are distributed between the indoor units of air conditioners. The alternating operation of the units contributes to uniform wear and load distribution.
Purpose of the matching block:
- Switching the voltage from the faulty equipment to the backup one with a failure notification.
- Alternating switching on of climatic units that provide a given temperature regime in the room.
- In case of temporary power supply problems, the split systems are automatically restarted.
- Unauthorized shutdown of climatic equipment from the control panel and changes in the set temperature parameters is prevented.
- Temperature control in the server room, with a significant increase in performance, the connection of two air conditioners at the same time.
Rotation unit connection for industrial climate systems
Industrial air-conditioning systems differ from domestic air-conditioning systems with a high compressor power, which allows increasing productivity, pipeline length and operating temperature range. At facilities with high heat generation, additional equipment is installed in the format of 100% reserve. It is equipped with the "Autorestart" function, which allows, after a power outage, to automatically put the split-systems into operation while saving all the settings.
The rotation unit for 2 air conditioners for the server room is connected in several ways:
- wired, power supply;
- by IR channel;
- dry contact.
Indoor units of climatic systems are installed on the same level, the distance between them is no more than 3 m. Installation of the rotation unit is carried out with the power supply disconnected. The temperature sensor is installed at a point equidistant from air conditioners. The contacts are connected to the corresponding terminals.
Infrared rotary systems can control 15 medium power devices.
Rotation with data transmission via infrared and radio channel
- control unit for rotation of the BURR;
- executive block of rotation of the LSI.
The infrared channel for data transmission does not need a wired connection. Commands from the base unit are transmitted over the radio channel to the executive units, which are installed one by one on the air conditioner. The complex can combine up to 15 split systems, divided into 2 or 3 groups. It is possible to combine different rotation options. The workgroup is configured through the base module.
Distinctive features of IR rotation:
- A wide range of cooling options thanks to the use of 15 split systems. Air conditioners of various brands and capacities are connected to the complex. It is not required to equip the equipment with the "Restart" function.
- The wireless device saves time and money for laying communications.
- High reliability of the system, which has no switching devices in the design. Burnout of contacts is excluded.
- Easy setup, the ability to place the base in an adjacent room.
Commands are received by the executive units via the radio channel at a distance of up to 50 m. The settings are stored in non-volatile memory. The air conditioning rotation system can be used in a temperature range of -20 ° to + 70 ° C.
Technical characteristics of the matching module for air conditioners
- control of the same output of the main and reserve devices;
- automatic restart of split systems after power on;
- measuring the temperature in the room;
- indication of the state of climatic equipment;
- message about an emergency situation;
- system information and history of major events are recorded and stored in non-volatile RAM.
The air conditioning adapter is a microprocessor-based device that collects and processes data and controls climatic units. SRK technical parameters:
- supply voltage - 220 V;
- consumption current - 0.5 A;
- current frequency - 50 Hz;
- type of power supply - alternating single-phase current;
- protection class - IP40.
СРК-М adapters are compatible with air conditioners of different manufacturers. The connection methods differ: Daikin - through adapters, Mitsubishi Heavy - directly into the Cn-T connector or the internal module board, Mitsubishi Electric - depending on the series, can be carried out through dry contacts, an adapter or directly. For air conditioners from other manufacturers, it may be necessary to buy power relays that are installed in the power supply circuit of the indoor unit.
In industrial and semi-industrial air conditioners, control is usually carried out via dry contacts.
The installation of a rotation unit saves money on repairs and replacement of climate control equipment. The coordinator increases the operating time of split systems, serves as a guarantee of reliable protection of servers from overheating and fluctuations in humidity.
