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Excellence A/C & Heating LLC
Excellence A/C & Heating LLC

Why is Vacuum Pumping Required for the Split System Heat Pump Installation?

In the era of low-carbon economy, the wind of clean heating is blowing, which makes the star air source heat pump shine in the HVAC industry. With the advantages of clean and environmental protection, high efficiency, energy saving, safety and reliability, it quickly occupies a large market share and is widely favored by the market.

Understanding of split heat pump installation

When dealing with this large heating equipment, from product selection to purchasing, installation, and maintenance, every step is important. People often focus on the product itself and neglect the subsequent problem of split system heat pump installation, thinking that a good product can be used casually. However, this is not the case. You can imagine that after visiting the market several times, you finally choose a brand that satisfies you among numerous brands. After purchasing the product, if it fails due to errors during installation, it will be a pity. Therefore, after selecting the product, the installation process cannot be careless. One problem with split system heat pump installation that is easy to overlook: vacuuming.

The reason for split heat pump installation vacuuming

Why do you need to evacuate air during split heat pump installation? Air source heat pumps absorb low-temperature heat from the air and convert it to achieve cooling, heating, and hot water services. The water in the air is one of the biggest enemies of air source heat pumps. Therefore, when the main unit has too much water, it will cause the unit to malfunction and not work properly. Therefore, it is necessary to remember to vacuum during installation.

At this point, someone must be wondering, how could there be moisture in the pipeline just when the unit is running? That‘s because the pipeline is intimately in contact with the atmosphere when it is not installed. When the pipes are connected, air is trapped inside, and this air contains non-condensing gases such as water vapor, nitrogen, oxygen, and carbon monoxide. At the same time, these gases are not compatible with refrigerants.

What will happen if these air pockets are not eliminated? When split system heat pump installation is not vacuumed, as the main unit runs, these air pockets will enter the system, and the following situations will occur: the lubricating oil in the compressor of the air source heat pump will react with water vapor in the air to produce water-soluble acids, which will corrode the copper pipes and affect the service life of the product. After copper corrosion, copper ions will be dissolved in the refrigerant, causing "copper plating" phenomenon, damaging the compressor; water mixed in the refrigerant will cause the expansion valve or capillary to freeze, thereby blocking the refrigerant flow and causing "ice blockage" phenomenon.