Central Air Conditioning Installation School: Refrigerant Piping System Installation_Project Examples

　　 Central air-conditioning installation is a complex and complicated system project, and it is also the crystallization of collective strength and wisdom. This process not only involves the cooperation between various departments and various types of work, but also involves the installation of many parts and components, including the installation of the refrigerant piping system.

　　The installation and construction plan of the residential central air-conditioning project stipulates that the installation of refrigerant pipes should meet the following requirements

　　(1) The inner and outer walls of the pipes and pipe fittings should be clean and dry; the location of the pipes and the installation elevation Should meet the design requirements.

　　 (2) The bending radius of the refrigerant pipe elbow should be greater than 3.5D (pipe diameter), and the ratio of the short diameter of the pipe after bending deformation to the original diameter should be greater than 2/3.

　　 (3) Protective sleeves should be provided for pipelines passing through walls or floor slabs. The outer wall holes through which the pipelines pass should be inclined to the outdoors and should be sealed. Pipe welds should not be placed in the sleeves. The protective sleeve should be flush with the wall or floor bottom, but should be 20mm higher than the floor surface. The gap between the pipe and the casing shall be sealed with non-combustible flexible material.

The installation and construction plan of 　　 household central air-conditioning project also stipulates that after the refrigerant pipeline is installed, the system (except indoor and outdoor units) should be purged with nitrogen. After the system has been purged, the system should be The spool of the middle valve is removed and cleaned. After the construction of the refrigerant piping is completed, Qing will test the air tightness and vacuum degree of the entire refrigerant piping system (except the outdoor unit) according to the technical requirements of the unit. Through the above introduction, I believe you have an understanding of the installation process of the refrigerant piping system.

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