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•
Turn off at the shut-off valve by turning the combination control knob "shut-off valve & fl ow
selector" in a clockwise direction to OFF position. Do not use excessive force (Maximum
recommended closing torque is 3 Nm).
•
For combination valves fi tted with pressure outlet, ensure it is in working condition by
connecting and disconnecting quick-coupler probe.
If any leakage is detected, apply the procedure described in Chapter 7.1.3. and return the
valve for service.
Sudden opening could result in a danger of fi re or explosion arising from oxygen pressure
shocks.
7.1.2. USE OF COMBINATION VALVE
7.1.2.1. Use of combination valve fl ow outlet and setting of fl ow
•
Ensure that the accessory is connected to the fl ow outlet.
•
Open slowly the combination control knob "shut-off valve & fl ow selector" in anticlockwise
direction to ON position.
•
Set the combination control knob "shut-off valve & fl ow selector" on one required fl ow rate.
Before connecting any accessory to the fl ow outlet make sure that the patient is not con-
nected.
Sudden opening could result in a danger of fi re or explosion arising from oxygen pressure
shocks.
Always ensure that the combination control knob "shut-o valve & fl ow selector" has been
engaged and not placed between two settings otherwise the fl ow control head will not deliver
correct fl ow of medical gas.
On fl ow control head, each valve is provided with so-called "end stop" located downstream
the maximum fl ow position. Do not try to apply excessive force on the combination control
knob "shut-o valve & fl ow selector" when it stops on the maximum fl ow position during an-
ticlockwise rotation.
Medical gas fl ow rate must be prescribed by a doctor.
7.1.2.2. Use of combination valve pressure outlet
•
Ensure that the accessory IS NOT connected to the pressure outlet.
•
Open slowly the combination shut-off valve by turning slowly the combination control knob
"shut-off valve & fl ow selector" in anticlockwise direction to ON position.
•
Connect the accessory to the pressure outlet.
Before connecting any accessory to the pressure outlet make sure that the patient is not con-
nected and the accessory outlet is secured.
If pressure outlet is to be connected to a medical device that requires high gas fl ow (for
instance pulmonary ventilator that requires gas fl ow 100 l/min at the minimum pressure 2.8
bar), compare the required fl ow of connecting medical device with pressure and fl ow charac-
teristics of the combination valve stated in appendix Nr. 1. To assure su cient performance
(pressure and fl ow characteristics of the combination valve ) the medical device should not be
used if the content indicator of E-Indicator Display enters the red zone..
Sudden opening could result in a danger of fi re or explosion arising from oxygen pressure
shocks. Insu cient opening of the shut-o valve could reduce actual fl ow delivered.
If a pressure outlet as well as a fl ow outlet are part of the combination valve do not use them
simultaneously, especially if pressure in the cylinder is below 50 bar, in could adversely a ect
the outlet parameters of the combination valve .
9/52
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