Flushing; Preparing To Flush; Manually Draining The Batch Tank - Grundfos Oxiperm Pro OCD-162 Instrucciones De Instalación Y Programación

9.5 Flushing

Warning
Risk of poisoning from chlorine dioxide gas.
Do not mix sodium chlorite and hydrochloric
acid.
Do not put suction lances in the same bucket.
Do not insert suction lances in the wrong
container.
Observe the labels on chemical containers,
suction lances and pumps: red = HCl,
blue = NaClO .
2
Warning
Risk of serious personal injury and damage to
equipment and due to incorrect handling of
chemicals.
Use personal protective equipment
(protective gloves, clothing and eye protective)
while working on the equipment.
Warning
Risk of burns from stray droplets when removing
the suction lance from the chemical container.
Use caution so to avoid chemical contact with
skin, clothing, shoes and the floor.
Any stray droplets on the container or in the
collecting tray must be immediately rinsed away
with water.
The Oxiperm Pro system has two flushing functions:
• Automatic flushing, see section
after a power supply interruption.
• Flushing with the "flushing" menu command, described in this
section.
The Oxiperm Pro system must be flushed with the "flushing"
menu command in the following situations:
• prior to an extended shutdown of the system
• prior to maintenance and servicing work.
The entire system is flushed with water to remove any traces of
chemicals in the suction hoses, pumps and reaction tank.
Dilution water is used for flushing. Before flushing, the suction
lances have to be removed from the chemical containers, and
placed in individual 5 gallon (10 liter) buckets with drinking water
so that they take up the water. Each pump is flushed for four
minutes.
Before flushing, the batch tank must be manually drained via the
drain cock.
• Only start flushing when the chlorine dioxide production is not
running. Otherwise the "flushing" menu is not visible.
The flushing process can be stopped anytime with [Esc].
start
H O
2
Fig. 14 Flushing process
32
9.4.4 Continuing production
pump HCl:,
2 min.

9.5.1 Preparing to flush

1. Before starting to flush, have ready the following items:
– Empty 5 gallon (10 liter) plastic buckets (1 bucket for
OCD-162-5, -10, -30, and 2 buckets for OCD-162-60)
– PE hose, 11 x 8 mm, for the drain cock on the batch tank
– Chlorine dioxide breakdown substance (sodium thiosulfate
Na S O x 5 H O): 20 g for OCD-162-5, 40 g for
2 2 3 2
OCD-162-10, 120 g for OCD-162-30, 240 g for OCD-162-60
– Two 5 gallon (10 liter) buckets filled just over half full with
water
– The original screw caps for the chemical containers.

9.5.2 Manually draining the batch tank

1. Place the two 5-gallon (10 liter) buckets filled with water to the
right and left of the chemical containers.
2. Untwist the screw cap on the suction lance of the sodium
chlorite container. Remove the suction lance, and place it in
one of the buckets of water.
3. Screw the original cover onto the sodium chlorite container
(blue label).
4. Untwist the screw cap on the suction lance of the hydrochloric
acid container (red label). Remove the suction lance, and
place it in the other bucket of water.
5. Screw the original cover onto the hydrochloric acid container.
6. Fill the empty bucket with 1 liter of water and 20 g
(OCD-162-5), 40 g (OCD-162-10) or 120 g (OCD-162-30) of
chlorine dioxide breakdown substance, and place it to the left
of the Oxiperm Pro. For the OCD-162-60, fill two empty
buckets, each with 1 liter of water and 120 g of chlorine
dioxide breakdown substance, and place them to the left of
the Oxiperm Pro.
7. Remove the cover from the Oxiperm Pro.
8. Connect one end of the hose (PVC) to the drain cock of the
batch tank, and place the other end in the bucket. Open the
drain cock.
9. Empty the contents of the batch tank (OCD-162-5 around
1 liter, OCD-162-10 around 1.8 liters, OCD-162-30 around
6.5 liters, OCD-162-60 around 13.0 liters) into the bucket(s).
10. When the batch tank is empty, close the drain cock.
pump NaClO2:,
H
2 min.
O
2
Drain int. batch tank
[OK]
please wait!
end