The server room is reserved for the installation of telecommunication equipment designed for storage and processing of information. The data center has requirements for humidity and air temperature. The optimal microclimate is maintained by air conditioning. The split system is not able to withstand the operation without shutting down around the clock. In order to ensure uninterrupted cooling of the room, reserve climate units are installed. Controls their device rotation air conditioners.
Purpose of the air conditioner rotation unit
To ensure standard climate parameters, air conditioning is installed in the server rooms. One device cannot guarantee uninterrupted cooling of the data center. In the event of a breakdown or service, reserve power is required. Installation of two or more air conditioners provides reliable protection against overheating of expensive equipment. Split systems operate alternately, turning on after a certain period of time. The sequence of their work is controlled by a rotary air conditioning control unit.
An automatic device eliminates the need for human intervention. A conditioner for 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 internal modules of the air conditioners. The alternate operation of the plants contributes to uniform wear and load distribution.
Appointment of the coordination unit:
- Switching voltage from faulty equipment to standby with a breakdown warning.
- The alternation of the inclusion of air conditioning systems, providing a given temperature in the room.
- In case of temporary power problems, the split-systems are automatically restarted.
- Prevents unauthorized shutdown of HVAC equipment from the control panel and making changes to the set temperature parameters.
- Temperature control in the server room, with a significant increase in performance, the connection of two air conditioners simultaneously.
Connection of a rotation unit for industrial climate systems
Industrial air conditioning systems differ from households 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 “Auto-start” function, which allows, after a power outage, to automatically put the split-system into operation while preserving all the settings.
Connection of the rotation unit for 2 air conditioners for the server is carried out in several ways:
- wired, nutrition;
- on the IR channel;
- dry contact.
The indoor units of the climate systems are installed at the same level, the distance between them is no more than 3 m. The rotation unit is mounted with the power off. The temperature sensor is installed at a point equidistant from the air conditioners. Contacts are connected to the corresponding terminals.
Rotary systems operating through the IR channel can control 15 medium power devices.
Rotation with data transmission via IR and radio channel
The rotation and backup system using the infrared channel for data transmission consists of several parts:
- BURR rotation control unit;
- executive block rotation LSI.
The infrared channel for data transmission does not need a wired connection. Commands from the base module are transmitted by 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 characteristics of rotation through IR:
- A wide selection of cooling parameters thanks to the use of 15 split systems. The complex connects air conditioners of various brands and capacities. It is not necessary to equip the equipment with the “Restart” function.
- Wireless device saves time and money on laying communications.
- High reliability of the system, which does not have switching devices in the design. Contact burning is excluded.
- Easy setup, the ability to place the base in an adjacent room.
Commands are received by executive units via a radio channel at a distance of up to 50 m. The settings are stored in non-volatile memory. The rotation system of the air conditioners can be used in the temperature range from -20 ° to + 70 ° C.
Specifications of the matching module for air conditioners
(IBS) is an integral part of the climate system. It is focused on ensuring the joint operation of two or three air conditioning devices. Functions of the matching module:
- control of the same output of the main and backup devices;
- automatic restart of split systems after power on;
- measuring the temperature in the room;
- Indication of the condition of climatic equipment;
- emergency report;
- System information and history of major events are recorded and stored in non-volatile RAM.
The conditioner for air conditioners is a microprocessor-based device that collects and processes data, as well as controls climate units. Technical parameters of IBS:
- supply voltage - 220 V;
- current consumption - 0.5 A;
- current frequency - 50 Hz;
- type of supply - alternating single-phase current;
- protection class - IP40.
The module is equipped with an air temperature sensor operating in the range from -50 ° to + 125 ° C. Climatic systems are connected to the coordinator via adapters installed on the indoor unit. The switching mode is set by the timer. Depending on the model, a period of 1 hour to 10 days can be set. During the test connection of the conditioning unit, both climate systems connected to it are started. Then the backup installation is turned off, and the main one cools the server room.
Coordinators SRK-M are compatible with air conditioners of various manufacturers. Connection methods differ: Daikin - through adapters, Mitsubishi Heavy - directly to the Cn-T connector or internal module board, Mitsubishi Electric - depends on the series, can be done via dry contacts, the adapter or directly. For air conditioners of other manufacturers, it may be necessary to buy power relays that are installed in the power circuit of the indoor unit.
In industrial and semi-industrial climatic installations, control is usually done through dry contacts.
Installation of the rotation unit provides cost savings for the repair and replacement of HVAC equipment. The coordinator increases the operating time of split systems, and serves as a guarantee of reliable protection of servers from overheating and humidity fluctuations.
