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1. A leak test must be performed when connecting refrigerant pipes by pressurizing the system to 3.73MPa and checking for pressure drops over 24 hours. 2. If a pressure drop is detected, the leak location must be found by checking connections with hearing, feeling, or foaming solution and re-brazing or tightening any loose fittings. 3. After leak testing, air must be purged from the system using a vacuum pump to remove nitrogen and other gases to prevent operational issues, with vacuuming performed for

Author

alone160162l

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EN