Installation; Installation Location; Installation Of The Did; Hydraulic Connection - Grundfos DID Montage- Und Betriebsanleitung

4. Installation

WARNING
Electric shock
- Switch off the power supply before installation.
- IP65 only applies, if the housing cover and the
terminal compartment of the CU 382 are properly
closed, and the appropriate cable glands or
dummy caps are fitted.
- Installation must be carried out by qualified and
authorised persons.
See also the manual "Sensors" supplied with the
sensor. Find the manual "Sensors for DID" on
Grundfos Product Center: (http://net.grundfos.com/
Appl/ccmsservices/public/literature/filedata/
Grundfosliterature-6119622.pdf).

4.1 Installation location

Correct installation is important for proper functioning of the DID.
• Make the DID easily accessible for all tasks.
• Provide sufficient space for all components of the DID.
• Avoid external interferences, such as electric and electro-
magnetic interferences by leakage current, earth fault of
pumps, electric motors, high voltage currents.
• Protect the DID from direct sunlight and rain.
• Provide a reliable power supply for the control unit.
See also section 12. Technical

4.2 Installation of the DID

DID with flow cell
All parts of the DID with flow cell are assembled on a backplate
with pre-drilled holes for quick and easy installation.
• Use spacers (min. 10 mm) for installation of the DID with flow
cell on a flat wall.
See also sections 8. Product introduction
DID with sensor for tank immersion
The CU 382 control unit of the DID with sensor for tank immersion
can be mounted directly on a wall. See also sections
introduction and 12.4 Dimensions.

4.3 Hydraulic connection

See also the labels on the backplate as well as the section
12. Technical data.
The maximum flow through the flow cell of the DID is limited by
the integrated flow restrictor.
Use a vented outlet or a pressure-loading valve to avoid siphon
effect. Do not install a shut-off valve in the outlet line.
6
data.
and 12.4 Dimensions.
8. Product
4.3.1 Installing the measuring water inlet and outlet
1. Remove the blind plugs from the inlet thread and the outlet
thread of the flow cell.
Fig. 1 Blind plug
2. Connect the Rp 1/2" hose adaptor fittings to the inlet and the
outlet.
– The Rp 1/2" hose adaptor fittings are included in the
standard delivery of the DID.
3. Assemble the inlet and the outlet hose as follows:
– Push union nut and tensioning ring across the hose.
– Push the cone part fully into the hose, see fig. 2.
– Attach the cone part with hose to the adaptor fitting.
– Tighten the union nut manually. Do not use tools.
Union nut
Hose
Fig. 2 Connecting the inlet hose
Avoid high loads caused by long or heavy hoses hanging from the
outlet port of the flow cell. A strain-relief for the outlet hoses may
be required.

4.4 Installing the sensors

All sensors used in the DID are packed separately to avoid
damage. They have to be prepared before installation according
to the "Installation" section in the manual "Sensors" supplied with
the sensor.
• For installation of the sensors in the flow cell, see the manual
"Sensors" supplied with the sensors.
• As soon as the sensors are ready for operation, they must be
wetted.
• Sensors equipped with electrolyte and membrane cap must
remain powered.

4.5 Checking the tightness

1. Carefully open the inlet valve and check for any leakage of the
flow cell assembly.
2. Check if any air bubbles are visible within the hose.
3. Purge the bubbles out by temporary increase of the flow.
Tensioning ring
Cone part