Starting Up The Product; Preparing The Pump For Startup; Safety Instructions And Requirements For Startup - Grundfos DMX 221 Installations- Und Bedienungsanleitung

3. Starting up the product

3.1 Preparing the pump for startup

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Related information
• 3.2 Safety instructions and requirements for startup
• 3.3 Starting up the pump
• 11.1.4 Checking the diaphragm leakage sensor

3.2 Safety instructions and requirements for startup

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Observe section Safety instructions and requirements for startup.
Make sure the pump has been connected electrically by a qualified person.
Make sure the power supply specified on the nameplate matches the local conditions.
Check that all pipe or hose connections have been tightened properly and tighten them, if
necessary.
Check that the dosing head screws have been tightened with the specified torque and tight-
en them, if necessary.
Check that the vent plug on the pump housing is open.
For pumps with integral relief valve: Check that the overflow line is connected properly to the
integral relief valve.
For pumps with diaphragm leakage sensor: Check that the diaphragm leakage sensor is
functioning correctly.
WARNING
Chemical hazard
Death or serious personal injury
● Observe the material safety data sheet of the dosing medium.
● Wear protective clothing when working on the dosing head, connections or
lines.
● Collect and dispose of all chemicals in a way that is not harmful to persons or
the environment.
● Make sure the pump has been correctly installed and is ready to be started
before you switch on the power supply.
WARNING
Chemical hazard
Death or serious personal injury
● Tighten the dosing head screws after initial startup and every time the dosing
head has been opened. After 6-10 operating hours or two days, retighten the
dosing head screws using a torque wrench.
The vent plug must be open while the pump is running.
Only adjust the stroke length while the pump is running.
DMX 221 | | 13