Wall Mounting; Hydraulic Connection - Grundfos Oxiperm OCD-164 Montage- Und Betriebsanleitung

5.5 Wall mounting

• The mounting material includes screws, wall plugs, washers
and nuts.
• Mount the supporting frame on the wall using the enclosed
mounting material. Select the mounting height such that the
containers with chemicals can be located underneath, and that
the controller display is easy to read. Drilling scheme see
section 2.1.5 Dimensions.
• The liquid level of the containers when full with chemicals
should always be below the dosing pumps.
The system must be freely accessible on the left and
Caution
right for maintenance work (approx. 50-60 cm
space).
The mounting material also contains a M6x20
Note countersunk screw for fixing a gas sensor, see
section 11. Accessories, underneath the reactor.

5.6 Hydraulic connection

Warning
Before hydraulic connection, disconnect the system
from the mains.
It must be possible to insert the suction lines (items 5 and 6) for
hydrochloric acid and sodium chlorite into the tanks without
tension.
• Install the suction hose, return hose and the two empty alarm
cables of the suction line in the tank such that the bottom end
of the suction line is approx. 1 cm above the base of the tank.
5.6.1 Bypass
• In the case of the version with solenoid valve, provide the
dilution water supply line with an isolating valve, and route the
remaining part of the line up to the inlet connection in PVC
tube, and connect.
• In the case of the version with internal bypass pump, route the
dilution water line in a PVC tube as directly as possible from
the main water line up to the inlet connection. Provide a
sampling shut-off valve on the main water line.
Warning
If the sampling line and the solution line are
connected to the same water circuit, a non-return
valve must be fitted in the main line between the
dilution water sampling point and the injector in order
to prevent circulation of the solution with dangerous
building up of chlorine dioxide.
• Route chlorine dioxide solution line to the injection unit in PVC
tube. An isolating valve should also be fitted in this line directly
upstream of the injection unit.
5.6.2 Safety exhaust device (option)
1. Mount the safety exhaust device underneath the system
cabinet.
2. Cut the supplied PE hose to length, and connect to the
diaphragm check valve of the suction injector and to the
associated screwed gland of the supporting frame (in the
centre of the base).
3. Route the injector motive water line in PVC tube of DN 20,
and connect to the solenoid valve. Route the disposal line in
PVC tube of DN 20, and connect to the outlet connection of
the suction injector.
4. Insert the plug of the control voltage cable into the solenoid
valve socket and tighten the plug screw.
The motive water of the suction injector must be free
from sand and suspended matter. It is therefore
Caution
recommendable to install a dirt trap upstream of the
solenoid valve.
16
Fig. 11 Safety exhaust device, installation scheme
Pos. Description
1 Disposal pipe (waste water/untreated water) DN 20
2 Suction injector
3 Solenoid valve
4 Pressure reducer
5 Water supply line
6 Booster pump
Connection - version A
This connection option is used if the pressure in the water line is
> 4 bar, and there is an adequate total quantity of water (bypass
water and motive water for the suction injector).
If the pressure is > 5 bar, there should be a pressure reducer (4)
installed, so that the pressure upstream of the suction injection is
between 4 and 5 bar.
Connection - version B
This connection option is used if the pressure in the water line is
> 4 bar, i.e. the prescribed pressure upstream of the suction
injection must be generated via a booster pump (6). If there is an
adequate volume of water in the supply line (5) (sufficient water
for the bypass and suction injector), the booster pump (6) can be
connected to the water supply line (5).
The water supply to the booster pump (6) can be conducted via a
separate water supply line at any time.