Dräger Narkomed 2B - Page 64

REPLACEMENT PROCEDURES (continued) NM2B
4.10.14 Connect the flexible N
2
O tubing that was removed in the previous
step to the tee fitting at the front of the replacement ORMC, and
secure the connection with a new tie strap clamp. (Later models do
not have the tee fitting.)
4.10.15 Connect the copper N
2
O lines to the replacement ORMC and tighten
the compression fittings.
* 4.10.16 Join the in-line wiring harness to the replacement ORMC connectors
and install a new tie-wrap cable clamp.
4.10.17 Connect the flexible O
2
tubing to the left side of the ORMC, and
connect the flexible N
2
O tubing to right side of the MPL switch.
Secure each connection with a press-on clamp. (Later models do not
have the MPL switch.)
4.10.18 Open the O
2
and N
2
O cylinder valves.
4.10.19 Set the System Power switch to ON, and perform the following test:
4.10.19.1 Open the N
2
O flow control valve three turns. There
should be no nitrous oxide flow.
4.10.19.2 Slowly open the O
2
flow control valve. The nitrous oxide
should start to flow when the oxygen flow is between 200
and 300 ml per minute.
4.10.19.3 Connect a calibrated oxygen monitor to the Freshgas
Outlet.
4.10.19.4 Adjust the oxygen flow to 1 liter per minute. The oxygen
concentration should be between 21% and 29% oxygen.
* 4.10.19.5 The yellow O
2
/N
2
O FLOW RATIO lamp on the alarm
panel should be lighted.
4.10.19.6 Adjust the oxygen flow to 1.5 liters per minute. The
oxygen concentration should be between 21% and 29%
oxygen.
* 4.10.19.7 The yellow O
2
/N
2
O FLOW RATIO lamp on the alarm
panel should be lighted.
4.10.19.8 Adjust the oxygen flow to a point where the nitrous oxide
flowmeter indicates 10 liters per minute.
Rev. A
4-32
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