Mindray WATO EX-55, Service Manual

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Either double-vaporizer manifold 29 or single -vaporizer manifold 50 is used. Both are
integrated with check valve 30 which prevents flushing O2 and fresh gas from flowing back
to the vaporizer. When a double-vaporizer manifold is used, Selectatec mounting with
interlocking function can prevent the user from turning on two vaporizers simultaneously.
ACGO Assembly
The above picture shows the ACGO assembly. The ACGO assembly includes five parts:
pressure switch 20, flow restrictor 21, pressure relief valve 31, ACGO selector switch 32
(three-way valve) and contact switch. Flushing O2 and fresh gas are mixed through the
three-way valve and enter the ACGO. The outputs include fresh gas provided for the
breathing system (when ACGO is turned off) and that provided for the patient (when ACGO
is turned on). Pressure relief valve 31 at the front restricts the pressure of flushing O2 and
also that of the fresh gas not to exceed 38 kPa (approximate value). Pressure relief valve 55 at
the back ensures that the pressure of the gas outputted to the ACGO does not exceed 12.5
kPa.
Auxiliary O2 Supply Assembly
Auxiliary O2 supply assembly 46 has two optional input ports (as shown below). O2 goes
from O2 supply inlet assembly, with flow controlled by a flow regulator and displayed by a
glasstube flowmeter, into the patient. The flow range adjusted is from 0 to 15 L/min and that
displayed is from 0 to 10 L/min at the resolution of 1 L/min. Turning the flow control
counterclockwise increases the flow and clockwise decreases the flow.
Vaporizer
Vaporizer