18
5.5 Continuing operation after an interruption
There are four ways in which operation can be interrupted:
•
ABORT ClO
2
PRODUCTION menu command (and after the
CONTROLLER OFF command)
•
fault
with an alarm message
•
an empty chemical container
•
power failure with power supply interruption.
5.5.1 Continuing operation after aborting ClO
2
production
If the controller has been switched off in manual operation, switch
the controller on again in manual operation:
1. Press [Man] (manual operation).
2. ClO
2
CONTROLLER > [OK].
3. (Controller) ON > [OK].
See section
.
The system automatically carries out a flushing process.
The process and dosing then run in normal mode.
5.5.2 Continuing operation after removing a fault
Confirm the alarm message, if necessary.
The system automatically continues operating.
5.5.3 Continuing operation after changing a chemical
container
The system automatically continues operating.
5.5.4 Continuing operation after a power supply interruption
As soon as the power is restored, the system is switched on
again automatically.
If the reaction vessel is full, the liquid is now in an undefined
state. It can contain too much hydrochloric acid or too little ClO
2
.
The control system uses the float switch in the reactor to
determine whether the reactor is empty or full and continues
operation accordingly:
•
If the reactor is full, it is filled
up with water. The undefined
liquid remains in the reactor, if necessary, until the final ClO
2
batch is dosed into the reservoir tank. The reaction vessel is
then emptied into the reservoir tank. The following alarm
message appears in the display: CHECK ClO
2
BATCH.
– After the CHECK ClO
2
BATCH alarm message, manually
drain the reservoir tank.
See section
. If the reservoir tank is not emptied
manually, the undefined liquid will be dosed.
•
If the reaction vessel is empty and the reservoir tank is full,
the final ClO
2
batch continues to be dosed. If the reservoir
tank is empty, the reaction vessel is drained into the reservoir
tank.
In "continuous" mode, a new production process is started when
the reaction vessel is empty.
In "once" mode, the ClO
2
production is stopped when the reaction
vessel is empty.
5.6 Flushing
For automatic flushing, see section
5.5 Continuing operation after
.
Flushing using the FLUSHING menu command is useful for long
system downtimes.
During flushing, the system is flushed with water to remove any
chemical residue in the suction lines, pumps and reactors.
Dilution water is used for flushing. However, the suction lances
must be removed from the chemical containers prior to flushing
and are placed in separate 10-litre buckets filled with drinking
water so that they can draw water in by suction.
Empty the reservoir tank manually at the drain cock prior to
flushing. If the reservoir tank is empty, the dosing pump is
switched off.
The reactor must be empty prior to flushing.
•
Only start flushing
if the ClO
2
production is not active
(the FLUSHING menu is also only visible in the display).
The flushing process can be stopped anytime using [Esc].
5.6.1 Preparing for flushing
Before using the FLUSHING menu command, have the following
to hand:
•
empty 10-litre plastic bucket
•
11 x 8 mm PE hose for reservoir tank drain cock
•
OCD-162-5: 20 g of ClO
2
breakdown substance sodium
thiosulfate Na
2
S
2
O
3
x 5 H
2
O
•
OCD-162-10: 40 g of ClO
2
breakdown substance sodium
thiosulfate Na
2
S
2
O
3
x 5 H
2
O
•
two 10-litre buckets filled with water
•
original screw plugs for the chemical containers.
Warning
Risk of poisoning from ClO
2
gas.
Never mix NaClO
2
and HCl.
Never put suction lances in the same bucket.
Never insert suction lances in the wrong
container.
Observe the labels for HCl (red) and NaClO
2
(blue) on chemical containers, pumps and
suction lances.
Warning
Risk of serious damage to equipment and
personal injury due to incorrect handling of
chemicals.
Before commencing work, put on protective
clothing (gloves, face mask, protective apron)
(German GUV-V D05).
Warning
Risk of burns from stray droplets when removing
the suction lance from the chemical container.
Take care that no stray droplets fall on skin,
clothing, shoes or the floor. Any stray droplets
on the container or in the collecting tray must be
immediately rinsed away with water.
Summary of Contents for Oxiperm Pro OCD-162-10
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