Sinclair SCV-750EB Service Manual page 22

24. Pressure gauge joint (high and low pressure side):
Charges or discharges refrigerant.
25. Capillary:
Normally return oil to the compressor.
26. Wired Controller:
Control and query the operation status of the unit.
SCV-1800EB
The piping diagrams is the same as SCV-900EB. SCV-1800EB system consists of two independent SCV-900EB systems.
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