Manifold Gauge Set: Notes

A manifold gauge set is used to determine system's high-side and low-side pressures, correct refrigerant charge, system diagnosis and operating efficiency. High (discharge) and low (suction) pressures must be compared to determine system operation. Manifold gauge sets for the two refrigerant types are basically the same. The fittings at the ends of the hoses are different to ensure connection only to a system using the type of refrigerant specified for that manifold gauge set.