Operation | Operation Manual C 2214 |
19
7 Operation
During normal operation of the plant the chlorine gas flow is either adjusted automatically using the regulating
valve or manually using the adjusting valve of the flow meter. In the case of automatic control systems the
measuring amplifier must be checked regularly by means of comparison measurements and must then be
calibrated if necessary.
7.1 Cylinder exchange
If a cylinder is empty the pressure gauge will indicate a decreasing cylinder pressure. A residual pressure of
approx. 0.1 – 0.2 bar remains in the cylinder. It prevents the penetration of damaging humidity into the cylinder
and the inlet valve. At this residual pressure all liquid chlorine in the bottle is evaporated and there are only
residual amounts of gaseous chlorine. When exchanging the cylinders, please proceed as follows:
• Close the cylinder valve (and if necessary the cylinder auxiliary valve)
• Evacuate possible residual chlorine amounts using the ejector until the ball in the flow meter lies still.
• Unscrew the union nut of the cylinder connection and remove the old flat gasket.
(Attention: Do not damage the gasket surface!)
• Close the connection of the metering unit
(using a PVC-plug or by mounting it to the PVC-wall holder)
• Close the cylinder connection with the screwed cap.
• Attach protection cap on the cylinder valve (if possible lubricate the thread using silicone grease)
• switch cylinder
• Attach the new cylinder to the wall holder before connecting it in order to prevent it from falling down.
Make sure that the cylinder content quiets down. The cylinder must have ambient temperature before
connecting a metering unit.
• The connection sealings made of special PTFE must not be greased with silicone grease. These sealings
must also only be used once.
• Carry out leakage test using ammonia vapor (see „Overpressure lines“ on page 18).
NOTICE!
Because of the residual pressure of 0.1 ... 0.2 bar, a very small amount of chlorine will escape when opening
the cylinder connection. Extremely sensitive sensors are able to detect even such small amounts. Therefore it is
permitted to deactivate the sprinkler system during cylinder exchange, if it will be reactivated after the cylinder
exchange. (e.g. by means of a door contact switch).
