Grundfos Oxiperm OCD-164, Installation And Operating Instructions Manual

Page: 14 / 528

English (GB)
14
5.4 Installation scheme
Fig. 6 Installation scheme with suction line length
5.4.1 System with solenoid valve
The systemis delivered as a standard with a solenoid valve in the
dilution water line. In this version, the supply of dilution water and
the addition of chlorine dioxide solution are not carried out in the
same water circuit.
Requirements
• 10 bar > water pressure > 1 bar.
• The counterpressure at the connection of the solution line
should be at least 0.5 bar less than the inlet pressure of the
dilution water.
Fig. 7 System with solenoid valve, installation scheme
Note
Select or set a contact water meter in such a way
that, at max. installation output, the control pulses
are not < 5 pulses/sec. Calculation of the contacts
see section
7.3.3 Contact input .
The control for the system can process a max. rate of
50 pulses/sec. If a value greater than 50 pulses/sec.
is calculated, use a different contact water meter.
Note
If the pressure at the injection unit is < 1 bar,
a pressure loading valve must be installed.
A pressure loading valve may not be used in
installations with an internal centrifugal pump, as this
pump only generates an increase in pressure of
approx. 5 mWC.
Note
For the dosing pumps DMI with Plus3 system, ensure
that the container is always underneath the dosing
pump, and the suction line is positioned in a
downwards direction, so that the chemicals can
easily flow back via the return pipe into the container.
Recommended L = min. 200 mm, see fig.
6 .
T
M
04
81
98
45
10
Caution
With the chlorine dioxide solution line shut off (at the
outlet) and an input pressure of more than 10 bar in
the dilution water line (at the inlet), there is a danger
that the system will be damaged.
The solution line must therefore be provided with an
excess pressure valve set to 10 bar.
L
T
M
04
8
1
99
45
10
Pos. Description
1 Supporting frame
2 Electronics
3 Connection for dilution water
4 Connection for solution line to the injection unit
5 Suction line for HCl dosing pump
6 Suction line for NaClO
2
dosing pump
7 Main water pipe (supplied by the customer)
8
Isolating valve for the injection unit (supplied by the
customer)
9 Sample extraction (supplied by the customer)
10 Non-return valve (supplied by the customer)
11
Isolating valve for dilution water extraction (supplied by
the customer)
12
Supporting frame exhaust device, with solenoid valve
(option)
13 Solution tank with level control (option)
14 External booster pump (option)
15 Load unit for the external booster pump
16
Pressure loading valve (supplied by the customer), if the
system pressure is < 1 bar
17
Inductive flowmeter (4-20 mA) or contact water meter for
proportional control of the system (observe the contacts
from the contact water meter).
1D&O2 +&O