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NM3
4.3
Cylinder Cutoff Valves (Canada)
Access to the cylinder cutoff valves requires removal of the table top from the
anesthesia machine. Figure 4-3 shows the locations of the O
valve assemblies. For machines equipped with a third gas, the tubing
arrangement is similar to the N
4.3.1
Disconnect all pipeline hoses and set the System Power switch to ON.
4.3.2
Close all cylinder valves except the O
4.3.3
Set the oxygen flow to 5 liters per min.
4.3.4
Open the other gas flow control valves to drain pressure from the
system.
4.3.5
Close the O
the O
4.3.6
Set the System Power switch to STANDBY.
4.3.7
Remove the screws holding the table top to the machine and lift out
the table top.
4.3.8
Remove the top drawer from the cabinet and pull the writing or
keyboard tray out to its fully extended position.
4.3.9
Disconnect the compression fittings indicated at points marked C on
the illustration.
4.3.10
Cut the tie-wrap clamp and disconnect the flexible tubing from the
cutoff valve assembly at the point marked A on the illustration.
4.3.11
Remove the cylinder cutoff assembly.
4.3.12
Connect the flexible tubing to the replacement cutoff valve assembly
and secure it with a new tie-wrap clamp.
4.3.13
Connect and tighten the compression fittings at points marked C on
the illustration.
4.3.14
Perform the following test:
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REPLACEMENT PROCEDURES (continued)
O cutoff valve assembly.
2
cylinder valve, and close the flow control valves. Press
2
Flush valve to drain oxygen pressure from the system.
2
Remove the plug from the test gauge connection at the Tee
fitting in the regulator outlet piping, and install a test gauge.
4-9
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valve.
2
and N
O cutoff
2
2
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Troubleshooting
