Dräger Narkomed 2B Operator's Instruction Manual page 76

Section 5 - Operation
Vaporizer
Draining
Vaporizer With
Key Indexed
Safety System
5-2-12
The key indexed safety system employs a matching pin-and-socket
assembly to prevent inadvertent use of the wrong agent in a Vapor 19.1
device. To drain a vaporizer with key indexed safety system valves, you
must have the appropriate keyed bottle adapter for the anesthetic agent.
1. With the vaporizer in an upright position, turn the handwheel to "0"
(zero-point interlock) and make sure the button engages in the locked
position.
2. Attach the keyed bottle adapter to the appropriate empty bottle.
Tighten to assure airtight seal. Mark the bottle to indicate that it
contains a previously used anesthetic.
3. Insert the bottle adapter fitting into the drain port of the vaporizer.
The two holes in the adapter fitting must face the Teflon seal surface
in the drain port.
4. Turn drain port lock screw clockwise to hold the adapter against the
Teflon seal.
WARNING: The vaporizer handwheel must be set to "0" (zero-point
interlock) before the vaporizer can be drained.
5. Hold the bottle below drain port level, and avoid kinking the plastic
tube. Open the drain valve by rotating the knob counterclockwise.
Allow the liquid to drain into the bottle until the vaporizer is empty.
The vaporizer is empty when no anesthetic flows from the drain.
6. Close the drain valve and remove the adapter from the drain port.
WARNING: Do not re-use drained agent.
7. Place the cap back on the bottle and dispose of the bottle in
accordance with approved hospital procedures.