Mindray WATO EX-55, Service Manual

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2-5
The anesthesia machine has pipeline and cylinder gas supplies available. Pipeline gas
supplies, which are O
2
, N
2
O and Air, go into the pipeline gas supply inlet assemblies through
pipeline connectors 1, 3 and 4 respectively. The pipeline pressure ranges between 280 and
600 kPa. Cylinder gas supplies, which are O
2
and N
2
O, go into the system through cylinder
connectors 2 and 5 respectively. The O2 and N2O cylinder pressures are 6.9 – 15 MPa and
4.2
–
6 MPa respectively, which are decreased to approximately 400 kPa through regulator 6.
Each connector is clearly marked and designed to prevent misconnection. All connectors
have filters and check valves. Color coded gauges show the pipeline and cylinder pressures.
Pressure relief valve 7 functions to prevent the supply gas pressure from being too high. It
releases excess gas when gas pressure exceeds 750 kPa. Each supply gas is outputted after
gas pressure is decreased below 200 kPa through regulator 24. Pressure switch 23 monitors
the O2 supply pressure. When O2 supply pressure is less than approximately 200 kPa, the
ventilator gives the alarm of O2 supply failure.
O2 pipeline
supply inlet
assembly
Air pipeline
supply inlet
assembly
N2O pipeline
supply inlet
assembly