Connecting The Power Supply Cable; Start-Up / Shutdown; Initial Start-Up / Subsequent Start-Up - Grundfos DMI 208 Installation And Operating Instructions Manual

6.2 Connecting the power supply cable

Warning
Disconnect the power supply before
connecting the power supply cable!
Before connecting the power supply
cable, check that the rated voltage
stated on the pump nameplate
corresponds to the local conditions!
Do not make any changes to the power
supply cable or plug!
The pump can be automatically started
Caution
by connecting the power supply!
The assignment between the plug-and-
socket connection and the pump must
Caution
be labelled clearly (e.g. by labelling the
socket outlet).
• Do not switch on the power supply until you are
ready to start the pump.
6.2.1 Versions without mains plug
Warning
The pump must be connected to an
external clearly labelled mains switch
with a minimum contact gap of 3 mm in
all poles.
• Connect the pump to the mains in accordance
with local electrical installation regulations.
Warning
IP 65 can only be ensured if the power
supply cable is connected with IP 65
protection (not for DMI 208 Inside!).
6.2.2 Version with mains plug
• Insert the mains plug in the mains socket.
6.2.3 DMI 208 Inside
• Connect the power supply cable according to the
connection chart on the pump.
Fig. 31 Connection chart of DMI 208 Inside
PE
L1/L2

7. Start-up / shutdown

Warning
Risk of chemical burns!
Wear protective clothing (gloves and
goggles) when working on the dosing
head, connections or lines!
Before each start-up, check the dosing
head screws.
After initial start-up and after each time
the diaphragm is changed, tighten the
dosing head screws.
After approximately 6-10 operating
Caution
hours or two days, cross-tighten the
dosing head screws using a torque
wrench.
Maximum torque:
DMI 0.3 - DMI 6.0: 2.1 Nm.
DMI 9.0 - DMI 18: 2.5 Nm.
Adjust the stroke length only while the
Caution
pump is running!

7.1 Initial start-up / subsequent start-up

7.1.1 Checks before start-up
• Check that the rated voltage stated on the pump
nameplate corresponds to the local conditions!
• Check that all connections are secure and
tighten, if necessary.
• Check that the dosing head screws are tightened
with the specified torque and tighten, if
necessary.
• Check that all electrical connections are correct.
3
With Plus system
• Open the isolating valve (D) at the calibration
tube.
Follow the notes for stroke-length
Caution
adjustment for the relevant pump type!
7.1.2 Assisting suction for Plus
3
Pumps with Plus system have an assisting suction.
• Fit the syringe and the piece of hose.
Fig. 32 Assisting suction for Plus
Warning
Ensure that the pump is stopped!
3
system
3
system
27