Table of Contents
Advertisement
5. Startup
WARNING
Toxic material
Death or serious personal injury
‐
Startup must be carried out by authorised and trained
experts.
‐
Observe the material safety data sheets (SDS) of the
handled chemicals.
‐
Wear personal protective equipment when handling
chemicals.
For startup, all components of the entire system must be
ready for operation.
Observe the manuals of the system and all other
components.
5.1 Functional tests before startup
Before startup:
•
Check the electrical connections.
•
Check the mechanical installation.
•
Check the setting of the contact manometer:
Medium
Contact manometer setting
Chlorine
2 bar
5.2 Tightness checks before startup
5.2.1 Checking the tightness of the gas dosing system with
nitrogen
WARNING
Toxic material
Death or serious personal injury
‐
Wear protective equipment when handling chlorine.
Before checking the tightness, carry out a visual
inspection of all gas-conveying parts and connections.
The 185 change-over unit is a component of a gas dosing system.
See the installation example.
If the gas dosing system is fitted with a nitrogen rinsing device, a
rough tightness check can be carried out with nitrogen. The
nitrogen supply line is connected to the free side of the header line.
1. Open the shut-off valves up to the gas dosing system.
The chlorine gas container valves must remain closed.
2. Open both motor valves of the 185 change-over device.
3. Set the pressure reducing valve of the nitrogen bottle to 2 bar.
4. Open the connection valve of the nitrogen bottle.
5. Slowly open the nitrogen bottle valve, until the contact
manometer of the 185 change-over device shows a pressure of
approx. 2 bar.
The nitrogen test pressure must not exceed 12 bar, otherwise
the rupture disc of the expansion tank may burst.
6. Apply a thin layer of leak detection spray to all pressurised
sealing points of the system components.
7. Shut off the nitrogen rinsing device.
Option
Bubbles appear and the
pressure drops.
No bubbles appear and the
pressure does not drop.
10
Description
The pressure line is leaky.
• Depressurise the system.
• Eliminate the leakage.
• Repeat the tightness check.
The pressure line is tight.
Depressurise the system.
5.2.2 Checking the tightness of the gas dosing system with
ammonia
WARNING
Toxic material
Death or serious personal injury
‐
Wear personal protective equipment when handling
chlorine.
‐
Avoid contact with escaping gas.
‐
Do not inhale test gases or vapours.
WARNING
Toxic material
Death or serious personal injury
‐
Clearly label ammonia containers to avoid confusion.
‐
Do not inhale ammonia gases.
‐
Avoid contact with ammonia.
‐
Keep ammonia containers closed before and after
use.
‐
Do not pour liquid ammonia over system components,
because this may cause corrosion-induced leakages.
Check the tightness only if the entire system is ready for
use.
Risk of gas leakage.
Always open and close shut-off valves slowly.
Risk of pressure surges and rupture of disc.
After a successful tightness check with nitrogen, the tightness of the
gas dosing system must be checked with ammonia.
1. Open the manual ball valves at the 185 change-over device.
185-2: The ball valves of the bypass line must remain closed.
2. Set operation mode switch (S3) at control cabinet to "man".
3. Open battery 1: Press key (S18) until lamp (H15) lights up.
4. Close battery 2: Press key (S37) until lamp (H42) lights up.
5. Open the container valves of battery 1, until the contact
manometer of the 185 change-over device shows a pressure of
approx. 2 bar. Close the container valves immediately.
Advertisement
Table of Contents
