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7. OPERATION
7.1. START UP OF MANIFOLD
When the unit is completely installed
and all shut off valves are closed.
•
Slowly open gas cylinder shut-off
valves.
•
Slowly open shut-off valves V1, V2
and V3.
•
Open purge valve V5.
•
Slowly open main-shut-off valve V4
to ventilate the unwanted "air" from
EN
the collecting unit and high pressure
hoses and close it back.
•
Close purge valve V5. The purge valve V5 must be closed during operation.
•
You should keep at least one of the cylinders closed to be used as reserve one. Close shut-off
valve V1, V2 and/or V3 for concerned cylinder(s) and concerned gas cylinder shut-off valve.
•
Assign cylinder with indication panels (Fig. 4).
•
To check if there is enough gas in the cylinders, use inlet gauge M1.
•
Check gauge M2 if the outlet pressure is as required.
7.2. CYLINDER CHANGE OVER
When 3 gas cylinders are connected to the collecting unit C1 and the one which is in use
indicates low pressure,the following steps are to be taken:
•
SLOWLY open full cylinder and its corresponding shut off valve on the collecting unit.
•
Close empty cylinder and the corresponding shut-off valve.
•
The gas cylinder indication panels must be now adjusted so that it is clearly apparent which
cylinder is in use.
•
Exchange of the empty cylinder(s) for a full one.
•
Close shut-off valves (V1 and/or V2 and/or V3 and/or corresponding to full gas cylinders or
cylinders you do not wish to exchange. The gas flow supply has now been stopped.
•
Open shut-off valve V4.
•
Close cylinder shut off valve of the empty cylinder(s) that you wish to exchange.
•
Open purge valve V5 to evacuate remaining gas from the collecting unit and high pressure
hoses. Close the purge valve V5 when all gas is evacuated.
•
Close the opened shut-off valves (V1 and/or V2 and/or V3 and V4).
•
Exchange empty cylinder(s) with full one.
•
Ventilate the unwanted gas as described in chapter 7.1 from the changed cylinders.
•
Then continue using the gas supply from the previously used cylinders. The indication panels
must always match the cylinder(s) in use to prevent unexpected running out of gas.
When 3 gas cylinder are connected to the collecting unit C1 and all 3 are empty, the following
steps are to be taken:
•
Open main shut off valve V4 .
•
Close cylinder shut off valves.
•
Open purge valve V5 to evacuate remaining gas from the collecting unit and high pressure
hoses. Close the purge valve V5 when all gas is evacuated.
•
Close the shut off valves V1, V2, V3 and V4.
•
Exchange empty cylinders for full ones.
•
Now follow steps from chapter 7.1 - start up the manifold.
7.3. SHUT DOWN
The manifold can be only shut down with agreement of a responsible person according to
standard EN ISO 7396-1.
For short term (hours) shutdown close shut-off valve V4.
For long term (days) shutdown close all opened shut-off valves on the unit (V1 - V4)and the
cylinder shut-off valves
Indication of gas type
Indication panels
Fig. 4: Indication panels
8/46
OXYGEN
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