Oxygen Supply Pressure Alarm Whistle (Canada) - Dräger Narkomed 2B Service Manual

Anesthesia system
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REPLACEMENT PROCEDURES (continued)
4.9

Oxygen Supply Pressure Alarm Whistle (Canada)

The oxygen supply pressure alarm whistle is located inside the flowmeter
housing. Access to the whistle assembly requires removal of the flowmeter
housing rear cover. Figure 4-9 shows the arrangement of the whistle assembly
within the flowmeter housing, and indicates the compression fittings that need
to be disconnected in order to remove the assembly.
4.9.1
Set the System Power switch to STANDBY, and remove AC power
from the machine.
4.9.2
Close all cylinder valves and disconnect the pipeline hoses.
4.9.3
Press the O
circuit.
4.9.4
Remove the screws holding the flowmeter housing rear cover, and
remove the cover.
4.9.5
Disconnect the three compression fittings at the locations shown in
the illustration, and remove the whistle assembly.
4.9.6
Position the replacement whistle assembly in the flowmeter housing,
connect and tighten the three compression fittings.
4.9.7
Replace the flowmeter housing rear cover and its retaining screws.
4.9.8
Connect the pipeline hoses and perform the following test:
--
--
--
--
4.9.9
Perform the PMS Procedure given in Section 6.
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FLUSH button to remove pressure from the oxygen
2
Set the System Power switch to ON.
Set the oxygen flow rate to 1 l/min.
Close the pipeline supply valve and observe the pipeline
pressure gauge.
The alarm whistle shall sound for a minimum of 10 seconds
when the pressure drops below the range of 35 to 30 PSI.
4-28
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NM2B
Rev. A

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