12
Operation
WARNING!
At no operating status may the maximum permissible oper‐
ating pressure for the system be exceeded.
WARNING!
The entire installation should remain leak-tight when oper‐
ating at maximum operating pressure.
12.1 Changing the chemical drums
WARNING!
Danger of explosion
If the two chemicals hydrochloric acid and sodium chlorite
come together, toxic ClO
2
gas forms almost instantaneously
and this can then explosively decompose.
–
The two components hydrochloric acid (HCl) and sodium
chlorite (NaClO
2
) must never be brought into contact
except in the mixer vessel.
WARNING!
Warning of toxic ClO
2
gas
–
Only trained personnel may change the chemical drums.
–
Observe the colour code.
Red stands for acid (HCl, left),
blue for chlorite (NaClO
2
, right).
–
Never pour chemicals from chemical canisters back into
the drums or pour them together.
–
Never place both suction lances in the same vessel.
–
To do so ensure that the "Acid" suction lance is installed
in the "Acid" chemical drum (observe colour-coded
labels) and the "Chlorite" suction lance is installed in the
"Chlorite" chemical drum.
WARNING!
Only use Bello Zon
®
chlorite. Never operate the chlorine
dioxide system with undiluted sodium chlorite.
Otherwise ClO
2
concentrations are formed for which the
system is not designed.
WARNING!
Only use Bello Zon
®
chlorite. Never operate the chlorine
dioxide system with undiluted sodium chlorite.
Otherwise, chlorite concentrations are formed in the treated
water that are harmful to human health.
Operation
43