Wine-Mate SSDWC Series - Manual (Page 21)

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amount of water must be provided for constant head pressure and proper
cooling, but excessive water flow will cause the unit working inefficiently.
3) The maximum permissible water pressure is 150 PSIG. If water pressure is
excessive, a pressure reducing valve must be used to reduce the water
pressure.
4) Service valve operation
1 - Process or Manometer
2 – Receiver Discharge or Compressor Suction
3 – Liquid Line or Suction Line
4 - Pressure Control
Back Position: Normal operation after installation is complete, process or
manometer port is closed.
Front Position: Storage or shipping operation, liquid or suction line connection
is closed.
Middle Position: Installation operation, all ports are open for evacuation, charge
and manometer.
BACK POSITION FRONT POSITION MIDDLE POSITION
Fig. 9 ROTALOCK Valve Operation
BACK POSITION FRONT POSITION MIDDLE POSITION
Fig. 10 Base Valve Operation
5. Checking Pressure Control Settings