Version With Mains Plug; Start-Up / Shutdown; Initial Start-Up / Subsequent Start-Up - Grundfos DMB Series Manual

Warning Electrical connections must only becarried out by qualified personnel!Disconnect the power supply
before connecting the power supply cable and the relay contacts!Observe the local safety regulations!
Warning The pump housing must only be opened by personnel authorised by Grundfos Alldos!
Warning Protect the cable connections and plugs against corrosion and humidity. Only remove the protective
caps from the sockets that are being used.
The power supply must be electrically isolated from the signal inputs and outputs.
The pump can be automatically started by connecting the power supply!
The assignment between the plug-andsocket connection and the pump must 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.

6.1 Version with mains plug

• Insert the mains plug in the mains socket.

7. Start-up / shutdown

Warning Risk of chemical burns!Wear protective clothing (gloves and goggles) when working on the dosinghead,
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 hours or two days, cross-tighten the
dosing head screws using a torquewrench.
Maximum torque: DMB 1.0 - DMB 5.0: 2.1 Nm. DMB 9.0 - DMB 18: 2.5 Nm.
Adjust the stroke length only while the pump is running!

7.1 Initial start-up / subsequent start-up

7.1.1 Checks before start-up
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Check that the rated voltage stated on the pump nameplate corresponds to the local conditions!
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Check that all connections are secure and tighten, if necessary.
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Check that the dosing head screws are tightened with the specified torque and tighten, if necessary.
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Check that all electrical connections are correct.
7.1.2 Assisting suction for systems without dosing medium flooded suction
At the dry suction/discharge valves:
1 Remove the suction line.
2 Hold a small container of water directly next to the suction valve and draw water until the dosing head is full.
3 Reinsert the suction line.
7.1.3 Starting pump without automatic deaeration
1 Open the suction and discharge isolating valves, if installed.
2 Open the deaeration valve of the dosing head by approximately 1 or 2 turns.
3. Let the pump run in continuous operation:
– Switch on the power supply.
– Pumps with electronics: Press the "continuous operation" button and keep it pressed.
– The pump switches to continuous operation at maximum stroke frequency.
– Set the stroke-length adjustment knob to maximum.
3 Leave the pump running until the dosed medium is free of air bubbles.
4 Carefully close the deaeration valve.
– The pump is now ready for operation.
7.1.4 Tightening 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 hours or two days, cross-tighten the dosing head screws using a torque
wrench.
Maximum torque: DMB 1.0 - DMB 5.0: 2.1 Nm.DMB 9.0 - DMB 18: 2.5 Nm.
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