Operation; Switching On The Chlorine Gas Dosing System; Changing The Chlorine Container While The System Is Running; Switching Off The Chlorine Gas Dosing System - Grundfos Vaccuperm VGA-111 Installations- Und Bedienungsanleitungen

7. Operation

The vacuum regulator doesn't have to be operated. When it is
correctly connected, and a sufficient vacuum has built up on the
outlet side, the vacuum regulator starts operation automatically.

7.1 Switching on the chlorine gas dosing system

1. Close the rate valve at the dosing regulator.
2. Open the shut-off valve at the injection unit.
3. Open the motive water valves.
4. Open the motive water supply of the injector.
5. Open the chlorine container valve.
6. Slowly open the rate valve, until the ball in the measuring
glass indicates the desired gas flow.
7.2 Changing the chlorine container while the system
is running
The red mark (empty indication) at the vacuum regulator shows
that the minimum pressure of the chlorine container is reached.
The container must be replaced.
Warning
Put on the required protective equipment.
1. Close the chlorine container valve.
2. Let the system run, until the measuring glass of the dosing
regulator shows no more gas flow.
3. Close the rate valve at the dosing regulator.
4. Turn off the motive water supply.
5. Close the motive water valves.
6. Close the shut-off valves before and after the injector.
7. Unscrew the vacuum regulator from the connection of the
container.
– Place the regulator into the wall support, if existing.
8. Screw the protective cap onto the empty chlorine container;
put the empty containers away, and protect them from rolling
away or turning over.
9. Position the new chlorine container, and fix it correctly.
10. Remove the protective cap from the new chlorine container.
– All connections must be absolutely clean and dry.
Warning
Replace the gaskets at any change of chlorine
container.
Never use the vacuum regulator without filter!
11. Insert the gasket at the pressure connection of the vacuum
regulator.
– Replace the filter, if necessary.
12. Screw the vacuum regulator onto the chlorine container.
Do not align the regulator by turning the housing!
Caution
If necessary, hold up with a 13-mm fork wrench.
Warning
Check the tightness before re-starting the system.
13. Check the tightness as described in section
tightness.
14. Re-start the system.
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7.3 Switching off the chlorine gas dosing system

7.3.1 Emergency stop in case of gas escape
7.3.2 Emergency stop in case of small leakages
1. Put on protective equipment!
2. Immediately close the chlorine container valve.
3. Let the system run until all parts are evacuated.
4. Switch off the system as described in the following.
7.3.3 Switching off while the system is running
1. Close the chlorine container valve.
2. Let the system run, until the measuring glass of the dosing
regulator shows no more gas flow.
3. Close the rate valve at the dosing regulator.
4. Turn off the motive water supply.
5. Close the motive water valves.
6. Close the shut-off valves before and after the injector.

8. Maintenance

Intervals for cleaning and maintenance
• At least every 12 months.
• Before every start-up.
• In case of malfunction.
6.1 Checking the
Warning
If gas escapes, immediately leave the room, and put
on protective equipment.
Start counter measures according to local safety
regulations.
Warning
Repairs of components of the system are to be
carried out only by authorised persons.
Warning
Maintenance has to be carried out only by authorised
and qualified personnel.
Before starting cleaning and maintenance work,
switch off the entire system.
Danger of chlorine gas escape!
Warning
Make sure that the system cannot be started
accidentally while working at it.
Warning
Before re-starting, check the tightness.
Danger of chlorine gas escape!