Manifold Gauge Set Connection
A/C Manifold Gauge Set ConnectionWhen performing any of the various tests for the system's state-of-charge, or internal pressures, the appropriate test equipment must be connected to the refrigerant system. If a charging station is used, follow the instructions of the manufacturer.
To attach a manifold gauge set such as Rotunda R- 134a Manifold Gauge Set 176-R032A or equivalent to the service port valves, proceed as follows:
1. Turn both manifold gauge set valves fully clockwise to close the high and low pressure hoses at the gauge set refrigerant center outlet hoses. Rotunda Quick Disconnect Adapters 176-R0027 and 176-R0026 or equivalents are required to connect the manifold gauge set or a charging station to the high and low pressure service gauge port valves.
2. Remove the A/C charging valve caps from the high and low pressure service gauge port valves.
3. If the manifold gauge set or charging station refrigerant hoses do not have the quick disconnect fittings on them, install Rotunda Quick Disconnect Fittings 176-R0027 and 176-R0026 or equivalents on the manifold gauge set low and high pressure hoses.
4. Connect the high and low pressure refrigerant hoses with adapters to the respective high and low pressure service gauge port valves.
5. Connect the hoses attached to the manifold center fitting to refrigerant supply tank and vacuum pump valves.