8
V3.0
U 189-010 en
5.3
First Commissioning
After the leak test has been terminated successfully, the
vacuum change - over device can be commissioned.
1
Entirely open the connecting valves of the drums or
cylinders.
2
Start the injector. Thereafter chlorine gas is dosed. The
position of the indicator pin of the change - over device
signals from which battery the chlorine gas is supplied.
5.4
Checking the Change - Over Function
1
Open all cylinders or drums and start the injector.
2
Close the supply battery that is in operation.
3
The change - over device switches the gas supply over
to the stand - by battery after a short period of time (that
depends on the dosing quantity and the length of the
line).
4
Then check, if the changing over from the stand - by
battery to the former supply battery functions, as well.
5
Open again all cylinders or drums. The vacuum change
- over device is now ready for operation.
5
Commissioning
After having completed the installation continue ommissioning
the change - over device.
WARNING
The device must be commissioned only by
qualified personnel strictly complying with the
instructions for handling the hazardous sub-
stance chlorine. The qualified staff must wear
protective clothing and gas mask when doing
the work described in the following.
NOTE
Prior to the initial starting all parts carrying
chlorine gas have to be checked for leaks.
5.1
Leak Test of the Vacuum Side
1
Close the connecting valves of the drums or cylinders.
2
Start the injector. Thereupon the vacuum lines are
evacuated and in this operating state the change - over
device switches uncontrollably.
3
After about 10 minutes (depending on the length of the
vacuum lines and on the setting of the adjusting valve)
the rotameter must not indicate a flow.
4
If the rotameter yet indicates a flow, the complete dosing
system must be checked for possible leaks.
Warning
As precondition for the leak test the chlorine
gas dosing unit must be evacuated and free of
chlorine gas and the injector be in operation.
5
To check the single components of the dosing system,
disconnect the vacuum lines between the vacuum regu-
lators and the rotameter one after the other and close
them tight with the finger.
6
If the rotameter stops indicating a flow after having dis-
connected one of the vacuum lines, the leaks has to be
at the disconnected component.
5.2
Leak Test of the Pressure Side
1
Stop the injector.
2
Open the connecting valves of the drums or cylinders by
about one revolution.
3
Check the connecting parts and inlet valves of the
vacuum regulators for leaks by means of ammonia.
Leaks are localized by passing the bottle with ammonia
close by the relevant parts and squeezing a little bit of
ammonia gas out of the bottle. If there is chlorine gas
escaping anywhere, white vapour develops.
WARNING
Even the slightest detected leaks have to be
removed immediately.
