Mindray WATO EX-55Pro, Service Manual

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The above picture shows the O2 flush button assembly. When O2 flush valve 20 is depressed, O2
rushes into the pneumatic circuit which is cut off when this valve is released. The O2 supply gas at
0.2 MPa after regulated goes through the O2 flush valve, the ACGO assembly, and into the
breathing system. The O2 flush button assembly is not affected by the system switch. Flushing O2
can be performed as long as O2 supply is normal. The O2 flush valve has a slide valve structure
inside which ensures automatic reset each time the valve is depressed and released via the spring.
2.2.4.7 Auxiliary Supply Assembly
For auxiliary supply assembly, O2 of 200KPa goes into the patient, with flow controlled by
regulator 24 and displayed by a glasstube float flowmeter. The flow range adjusted is from 0 to 15
L/min. Turning the flow control counter-clockwise increases the flow and clockwise decreases the
flow.
2.2.4.8 Drive Gas Switch Assembly
The core component of drive gas switch assembly (64) is a pneumatically controlled two-way
solenoidvalve, which is installed on Air limb or O2 limb to realize a main drive gas and a backup
drive gas. When the pressure of main drive gas limb is lower than 125 kPa, the alarm of pressure
switch on the exhalation valve is triggered, and a dialog of drive gas switch appears on the screen
to note the operater to turn on the drigve gas switch and enable backup drive gas.
O2 supply
inlet
assembly
Adjusting
knob
Gas
inlet
Gas outlet
Enter bellow
Main drive
gas
Bckup drive
gas