The system can be pressurized with the coolant or dry nitrogen itself and leakage can be detected with the use of:
• Soap foam: a dense foam containing soap water should be made,
detergent or shaving cream, involve welds, joints, connections, visors, valves and other suspected leakage points. The leakage is verified through the formation of air bubbles.
• Electronic detector: There are several types of electronic detectors, but they all work in a similar way. The detectors have a sensor that when it comes in contact with the refrigerant fluids creates a current that activates a milliammeter or a signal lamp or an audible alarm. The response (current, lamp brightness, buzzer noise) is proportional to the size of the leak. It is an excellent method and allows you to locate small leaks. Use and care must be carried out in accordance with the instructions of each manufacturer.
Notes: For tests on pressurized systems with only dry nitrogen, only the soap suds method can be used.
