Dräger Narkomed 3 Technical & Service Manual page 249

NM3
( ) 6.34 Open Reservoir Scavenger (if applicable)
6.34.1
6.34.2
6.34.3
6.34.4
6.34.5
6.34.6
6.34.7
6.34.8
6.34.9
6.34.10
Rev. V
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Remove all scavenger hoses one at a time and drain all accumulated
moisture. Inspect all scavenger hoses for deterioration and replace
any worn hoses.
Disconnect the hospital vacuum source from the scavenger.
Remove the scavenger flow control needle valve assembly. Inspect
the needle valve and seat for lint or dust accumulation. Clean with
compressed air if necessary, and reinstall the needle valve
assembly.
Remove the scavenger mounting screws.
Remove the two screws securing the access panel at the bottom of
the scavenger canister.
Remove and inspect the silencer; replace if needed.
Remove the reservoir canister from the scavenger body by
unscrewing the four socket head cap screws located at the top of the
canister.
Remove the flowmeter from its housing by turning it counter-
clockwise. Inspect the tube and clean with compressed air if needed.
Reassemble the scavenger assembly, and reactivate the vacuum
source.
Perform the following negative pressure relief test:
6.34.10.1 Connect a 19 mm scavenger hose between the bottom
of the absorber pole and the right-hand port on the
scavenger. Connect a 19 mm scavenger hose between
the APL valve and the rear port on the absorber pole.
The left-hand scavenger port may be capped for this
test, or may be connected to the ventilator relief valve.
Connect a DISS vacuum hose to the threaded terminal
on the left side of the scavenger. Alternatively, an
adapter can be used to attach a wall suction hose to
the hose barb fitting on the adapter.
6.34.10.2 Connect a short 22 mm breathing hose from the
inspiratory valve to the expiratory valve on the
absorber. Set the Man/Auto selector valve to the BAG
position. Turn the APL valve control knob fully
counter-clockwise.
6-45
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PMC PROCEDURE (continued)