Dräger Narkomed 2B, Service Manual, Page: 188 / 308

PMC PROCEDURE (continued) NM2B
6.7B.2 Scavenger, Open Reservoir Negative Pressure Relief
6.7B.2.1 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.
6.7B.2.2 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.
6.7B.2.3 Verify that the suction waste gas disposal system is active.
6.7B.2.4 Adjust the scavenger needle valve until the flowmeter indicates
between the white lines. Close all flow control valves on the
anesthesia machine. Occlude the absorber breathing bag terminal.
6.7B.2.5 Install a scavenger adapter with a hose barb (P/N 4108114)
between the 19 mm hose terminal of the scavenger, and the
scavenger hose. Connect a calibrated test pressure monitor to the
hose barb on the adapter and observe the pressure reading on the
test gauge. The gauge shall indicate a pressure of 0 to -0.5 cm
H
2
O.
6.7B.3 Scavenger, Open Reservoir Positive Pressure Relief
6.7B.3.1 Turn the scavenger needle valve fully clockwise (closed).
6.7B.3.2 Open the oxygen flow control valve on the anesthesia machine to
a flow of 10 l/min. and occlude the absorber breathing bag
terminal.
6.7B.3.3 The flow of oxygen shall now exit the system through the relief
ports around the top of the canister. The test pressure gauge shall
indicate a pressure less than 1.0 cm H
2
O.
6.7B.3.4 After the test, adjust the scavenger needle valve for a flowmeter
indication halfway between the two white lines.
Rev. Y
6-10
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