Next, attach the blue hose to the low-pressure port and the red hose to the high-pressure port. Using the gauge set to capture and reclaim refrigerant, or ensuring it is properly recycled, is not only a best practice but a legal requirement in many jurisdictions.
AC Gauge Hook Up Prevent R-22 Release
If pressure rises, it indicates a leak that must be located and repaired before charging the system with new refrigerant. The low-pressure port is typically larger, while the high-pressure port is smaller and often located on the opposite side.
Technicians rely on these readings to determine the next steps in maintenance or repair. Evacuation and Leak Testing Beyond standard operation, the manifold gauge set is essential for deep system service.
AC Gauge Hook Up Prevent R-22 Release
Identifying Service Valves and Ports Before any hook up can occur, you must locate the service valves on the refrigeration system. Then, connect the yellow hose to the vacuum pump or refrigerant supply.
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