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00:00:00 – 00:06:04
The YouTube video demonstrates techniques for working with refrigerant systems, focusing on raising copper refrigerant lines and brazing joints. Nitrogen is used to prevent oxidation during brazing, with an emphasis on removing the Schrader valve and regulating nitrogen flow. Cooling service valves with a wet rag and using a vacuum pump for evacuation are highlighted. Safety measures like wearing gloves and avoiding gas inhalation are discussed. The video ends with instructions for installing the Schrader valve and preparing for a pressure test. Key terms include nitrogen, Schrader valve, brazing, evacuation, and pressure test. Important conclusions stress the significance of proper techniques and safety precautions in refrigerant system maintenance.
00:00:00
In this part of the video, the main focus is on demonstrating how to raise copper refrigerant lines using nitrogen to prevent oxidation during the brazing process. The instructor shows the flow of nitrogen through the lines and emphasizes the importance of removing the Schrader valve to avoid melting it. Nitrogen is used to force oxygen out of the lines to prevent oxidation inside. The process involves setting the nitrogen tank pressure to below 50 psi and regulating the flow correctly. Removing the Schrader valve and effectively using nitrogen are key steps in ensuring clean refrigerant piping.
00:03:00
In this segment of the video, the process of braising a joint in a refrigerant system is demonstrated. The importance of using a wet rag to cool down the service valves to prevent overheating is highlighted. It is emphasized to avoid getting water inside the service access as it can mix with the oils and create harmful substances. Utilizing a vacuum pump to run an evacuation and reach the desired micron level of 500 microns is advised. Safety precautions, such as wearing gloves and avoiding breathing in gas during the process, are also discussed. The segment concludes with shutting down the nitrogen tank, installing the Schrader valve, and preparing for a pressure test up to the psi of the evaporator coil design pressure.