English (GB)
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7.2.6 Checking and adjusting NaClO level switch (4.04)
The level switch is installed on the T-piece (TP) in the NaClO
solution line. To check the level switch, electrolyte must flow
through the T-piece.
1. Activate solenoid valve (0.05) and brine pump (DP0.10) by
pushing the symbols.
– Electrolyte starts flowing through the system.
– Wait until the electrolyte passes level switch (4.04) and
reaches the degassing and storage tank (DST).
• The sensor indicates the electrolyte flow with an integrated
LED:
– No electrolyte flow detected: LED on
– Electrolyte flow detected: LED off
• On the display of the Selcoperm electrolyser, a small dot near
the level switch symbol indicates the electrolyte flow:
– No electrolyte flow detected: Dot is white.
– Electrolyte flow detected: Dot is blue.
• If the level switch (4.04) is adjusted correctly and electrolyte is
flowing through the system, the LED on the level switch is off
and the dot near the switch symbol is blue. This means: Liquid
is detected.
2. Deactivate solenoid valve (0.05) and brine pump (DP0.10) by
pushing the symbols.
– The electrolyte flow is stopped and the residual electrolyte
flows from the T-piece into the degassing and storage tank.
– Within approximately 15 minutes the LED on the level switch
lights up and the dot near the switch symbol turns white.
This means: No liquid is detected.
Adjusting the level switch with filled piping
Fig. 36
NaClO solution line level switch
The level switch connection can be rotated up to ± 30 ° to adjust
the switching level.
If LED (1) is off:
1. Turn adjusting screw (2) counter-clockwise until LED (1) lights
up.
2. Turn adjusting screw (2) counter-clockwise by 1 additional
revolution.
3. Turn adjusting screw (2) clockwise until LED (1) switches off.
4. Turn adjusting screw (2) clockwise by additional 90-180 °.
If LED (1) is on:
1. Turn adjusting screw (2) clockwise until LED (1) switches off.
2. Turn adjusting screw (2) clockwise by additional 90-180 °.
7.3 Switching to operation mode "Automatic"
In operation mode "Automatic" the system produces NaClO
solution. The process starts by filling up the system with
electrolyte. The level of electrolyte in the electrolysis cells and in
the NaClO solution line is monitored. This ensures, that the DC
current supply of the cells is only switched on after the cells and
the line are filled with electrolyte. As soon as cells and line are
filled, the small white dot near the respective level switch symbol
turns blue. See section
1. Make sure all commissioning tasks are performed in the
described order and finished. See sections:
•
7.1 Checks before commissioning
•
7.2 Starting up the system initially
.
2. Open menu "
System overview
".
The starting procedure depends on the level of NaClO solution in
the degassing and storage tank.
3. If the tank level is below 20 %:
– Push [
].
4. If the tank level is above 20 %:
– Push [
] and start production manually by pushing [
].
– The system activates the different components with certain
time delays. For details see section
.
5. Once production is running, check the system for hydrogen
gas leakage. See section
6. Check the alarms. See section
7. Check the NaClO solution. See section
The system produces NaClO solution until the degassing and
storage tank is filled up to the maximum level. See section
. Then the system stops the different
components with certain time delays. For details see section
. After a short time the small blue dot
near level switch symbol (4.04) turns white. This indicates that
the rest of the NaClO solution in the line is drained into the tank
and the T-piece is empty.
The system is in operating state "Standby", until the level in the
tank falls below the defined minimum level. Then it starts
production again.
TM
06
46
86
23
16
Pos.
Description
1
LED
2
Adjusting screw
2
1
30°
30°
The electrolyte that has entered the degassing tank
during the first commissioning steps does not contain
any NaClO. Only after switching to operation mode
"Automatic" the system starts producing NaClO
solution. Therefore the concentration of the NaClO
solution in the tank may not reach the full 0.8 %
immediately after commissioning.
During the first startup, the alarm limit of the DC
voltage can be exceeded or the alarm limit of the DC
current can be undercut. In this case acknowledge
the message and start the system again. See section
8.5.4 Acknowledge fault messages
This can happen several times.