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7.2 Changeover and cylinder change
7.2.1 Close the cylinder valve of the emptied gas cylinder.
7.2.2 Close the service gas valve (2). For two-sided mani-
folds with manual changeover, simultaneously open
the service gas valve of the other side at the same
time.
For stations with semi-automatic changeover, turn the
handwheel of the changeover regulator (8) to the other
side. After that, close the service gas valve.
Now the arrow in the handwheel of the changeover
regulator (8) points to the side from which the gas is
to be tapped.
7.2.3 Open the purge valve (1) on the side where the change
of the cylinder needs to be performed (pressure re-
lief). Close the purge valve and loosen the cylinder
connection of the flexible hose / spiral tube (5) at the
corresponding cylinder valve and connect the new
cylinder (see also section 9.1 Commissioning).
7.2.4 Pressure build-up flushing as described in points 7.1.5
to 7.1.6 repeat at least 5 times.
7.2.5 Slowly open cylinder valve(s).
7.2.6 Slowly open service gas valve (2). For manifolds with
manual changeover, open only the service gas valve
(2) of the side that is to go into operation, keep the
other side closed.
7.2.7 After the cylinder has been changed, the cylinder con-
nections and the detachable connections must be
checked for leak tightness.
7.3 Decommissioning
7.3.1 Close all valves (including cylinder valves).
7.3.2 Open and close purge valve(s) (1).
7.3.3 Depressurize battery pressure regulator (3) completely
by removing gas from the end user so that the system
is completely depressurized (upstream and down-
stream pressure gauges show 0 bar).
7.3.4 Unscrew the adjusting handle of the pressure regula-
tor (3).
7.1 Commissioning
7.1.1 The manifold has been mounted according to chapter
6 and checked for possible leakages. The piping sys-
tem mounted behind the manifold is filled with inert
gas of the appropriate gas quality clean and dry and
checked for any leakages.
7.1.2 Close all shut-off valves (1+2) and line valve (option).
Unscrew the adjusting handle of the pressure regula-
tor (3).The regulator spring is relaxed (not with semi-
automatic versions).
7.1.3 Place full cylinders in front of the cylinder bracket and
secure it with the strap or chain against falling over.
Remove the protective cap of the cylinder. Check the
valve thread, connection surface and seals. Check
that flexible hoses and pigtails (5) are not damaged.
Replace damaged or worn seals. Only connect cylin-
ders with the same permissible filling pressures (ap-
plies only to manifolds with multiple cylinders).
7.1.4 Screwtheunionnutoftheflexiblehose / pigtail(5)by
hand to the sampling valve of the cylinder.
7.1.5 Slowly open the cylinder valve and close it again (in
the case of multiple cylinders manifolds, open and
close all bottle valves). Check connection at the cylin-
der valve for tightness.
7.1.6 Slowly open and close purge valve (1) (for two-sided
stations, open and close purging valves on both
sides).
Repeat procedure 7.1.5 to 7.1.6 at least 5 times.
7.1.7 Slowly open cylinder valve(s).
7.1.8 Slowly open the service gas valve (2). For manifolds
with manual changeover only the service gas valve (2)
of the side that is to go into operation, keep the other
side closed.
For stations with semi-automatic changeover the ar-
row in the handwheel of the changeover controller (8)
points to the side from which the sample is to be
taken.
7.1.9 Set the pressure regulator (3) to the desired outlet
pressure by turning the handle clockwise until the de-
sired outlet pressure can be seen on the pressure
gauge (7) (not applicable for SA/SA.S version). If nec-
essary, open the main shut-off valve of the piping sys-
tem (option) slowly so that the pressure in the down-
stream line builds up slowly.
7.1.10 Consumers can now be opened. Check pressure at
pressure regulator (7) and readjust if necessary.
7 Operation
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