Index - Dräger Narkomed 2B Operator's Instruction Manual

Section 2
General Description
Gas Entry Via
Cylinder Yokes
2-4
The Narkomed 2B can be equipped with a maximum of two oxygen and
two nitrous oxide cylinder hanger yokes. An additional yoke for an
optional third gas is also available. To prevent a cylinder from being
improperly connected, the yokes are labeled, color-coded, and keyed for
gas-specific cylinders using the pin-indexed safety system.
A filter within each yoke prevents foreign material from entering the
internal gas piping of the Narkomed 2B. A check valve in each yoke
prevents leakage into the atmosphere if the cylinder is not mounted on
the yoke. When the machine is configured with two yokes for the same
gas, the check valve prevents movement of gas from one cylinder to the
other. If a cylinder is not mounted to a yoke, the attached yoke plug
should be placed between the yoke handle's threaded bolt and the yoke's
gas inlet.
When attaching a cylinder, make sure that only one washer is installed
between the cylinder and the yoke gas inlet. Using multiple washers
may compromise the pin-indexed safety system. Be sure to verify the
integrity of both index pins whenever you install a new cylinder.
WARNING: Check cylinder yokes for the presence of two index pins
each time you attach a cylinder to the machine. Use only
one cylinder gasket per yoke; using more than one gasket
could cause leakage of the cylinder gas and compromise
the pin-indexed safety system.
Cylinders attached to the hanger yokes must contain gas at the
recommended pressures outlined in the table below. (Indicated pressures
are of E-size cylinders at 70°F, or 21°C.) Cylinders measuring less than
the minimum recommended pressure (PSI - MIN) should be replaced
with new, full cylinders.
GAS
Air
Carbon Dioxide
Oxygen-Helium
Nitrous Oxide
Oxygen
* typical full load
*
PSI - FULL PSI - MIN
1900
838
1900
745
1900
1000
600
1000
600
1000