Countermeasures for HVAC system installation

An important sub-item in the construction of HVAC system installation and construction is also an extremely complex project, and its construction problems directly affect the quality and progress of the entire project. Generally speaking, the HVAC system design mainly includes cooling and heating system design, fresh air system design, exhaust system design, etc. The scope of coverage is not only a small area of heating, so the quality of the HVAC system air-conditioning installation project is directly Affect the performance of the building, the construction process must be strictly controlled to ensure the quality of installation.

Problems in construction

Ventilation and air-conditioning engineering is an important project for large buildings, and it is also one of the difficulties in installation engineering. Combined with the experience of HVAC installation, there are currently some problems in HVAC.　　

1, pipeline elevation, positioning and crossing seriously 　

The installation of HVAC equipment is a huge project. The pipelines involved are very complex and have different uses. For example, a complete HVAC design must cover the air conditioning terminal equipment, air supply ducts, exhaust ducts, and refrigeration. Design of various equipment and pipelines such as water pipes, electrical bridges, condensate pipes, sprinkler pipes, fire pipes, etc. If the layout and planning of certain functions and sizes of pipelines are unreasonable, the pipeline elevation and positioning will be severely crossed, which will bring greater difficulties to the construction and management of the project. usually,

In the case of unclear drawings, rash construction will cause problems such as difficulty in installation of construction pipelines. In this way, some pipelines will be forced to be installed at unreasonable locations or elevations, which will seriously affect the quality and progress of the project.　

2, HVAC system equipment noise exceeds standard 　

Generally, equipment noise mainly comes from the collision of air conditioner terminal equipment, which is also an important problem in the installation of HVAC equipment. After decades of development, my country's fan coil technology is relatively mature, and most of the products produced by fan coil manufacturers can meet noise standards. However, the actual situation is not optimistic. The parameter values provided by the manufacturers are significantly higher than the field test values and noise standard values. Therefore, layout design is the focus of equipment noise control, and appropriate sound insulation measures should be taken when necessary. The equipment noise parameter requirements must be marked in the design. Before installing the air-conditioning equipment, a careful inspection or even a trial operation is required. If the noise is found to exceed the national standard, it needs to be replaced or perfected immediately to avoid the expansion of the problem.　　

3, air-conditioning water cycle failure 　

If the water system of the air conditioner fails, it will not be able to complete the heating and ventilation tasks. Therefore, ensuring the smooth circulation of the water system is a key issue considered in the installation of HVAC equipment. The quality of its construction directly affects the operation of the entire system. In the water system circulation, the circulation pipeline of the chilled water system is not unblocked is a common problem. There are two main reasons for this failure. Pipe crossing is one reason, and the water system pipe is not clean on the other. Both of these problems can be improved by taking corresponding measures. For example, the water cycle failure can be improved by rationally arranging the slope and elevation of the pipeline, installing exhaust valves, drain valves, and trying to remove rust from the pipeline. These methods can greatly reduce this failure, so there must be strong in actual construction. The meaning of operation.　

4, the problem of condensation and dripping water 　

There will be condensation and dripping in the air conditioning system during debugging and operation. The reasons for this problem are multifaceted. For example, poor pipeline installation and insulation, poor contact between pipelines and fittings, pipelines and equipment, and illegal operating procedures for pipeline installation may all cause this problem. The quality of piping and key materials directly affects the quality of installation, so it is necessary to conduct a systematic inspection before pipe installation. The water pressure test can help to check the pipe dripping and other problems, so it is very meaningful to carry out a rigorous water pressure test on the system. When designing the pipeline, the length and slope of the pipeline should be appropriate, otherwise dripping will occur. The installation and arrangement of the pipeline should be suitable for the condensed water to be discharged as soon as possible, and a water sealing device can be installed if necessary.