Service Valves

Fig 1: Identifying Service Valves

Courtesy of VOLVO CARS CORPORATION

1. The service valve for draining, vacuum pumping and filling with refrigerant
2. Service valve for draining and vacuum pumping.

The service valves are used to:

• check the system through manometer connections
• drain the system of refrigerant
• vacuum pumping
• filling with refrigerant, high-pressure side only (1).