In recent years, with the acceleration of the construction of domestic information systems, the number of data center buildings has shown an upward trend. Due to intensive layout and long-tern operation requirements of equipment in data center, various systems in the buildings need to be stable and reliable, which specificaly inclube the following points:

• Operation of water system requires absolute reliability and sealing
• IT equipment require long-term continuous operation, and air conditioning systems require strong stability
• The temperature and humidity of the IT equipment environment should be constant and precisely controlled
• Operation and maintenance requirements continue to increase, and air conditioning equipment require online maintenance support.
• The data center consumes much power, requiring the air conditioning system to save energy, reduce consumption, and reduce the PUE value.