Startup; Before Startup; Starting Up The Product - Grundfos UPM3 Installation And Operating Instructions Manual

6. Startup

6.1 Before startup

• The system must be filled with liquid and vented before starting
the product.
• Make sure that the required minimum inlet pressure is available
at the pump inlet.
• When using the pump for the first time, the system must be
vented.
Related information
6.2 Starting up the product

6.2 Starting up the product

Before you start the pump:
1. Mount the pump in the correct position.
2. Check that the unions are tightened.
3. Check that the valves are opened.
4. Fill the system and vent it above the pump.
5. Check if the required minimum inlet pressure is available at the
pump inlet.
6. Switch on the power supply.
7. • If the pump is externally controlled: Check if the external
controller sends a signal that controls the speed or that might
have stopped the pump.
• If the pump is internally controlled: The pump starts with
factory pre-setting (e.g. proportional pressure curve 3).
Change the setting if necessary.
Do not start the pump until the system has been filled with
liquid and vented.
The pump is self-venting and does not have to be vented
before startup. Air inside the pump is transported by the
liquid into the system shortly after startup.
• Heating systems must be flushed according to local
standards, such as DIN EN 14336 or VOB ATV C DIN
18380, before startup. After filling the system for the
first time, the pump must run for approx. 1 hour before
a long-term stop.
• Inhibitors and additives increase the risk of malfunc-
tion of the pump.
• If filters are installed, they must be monitored and
maintained thoroughly.
Related information
6.1 Before startup
7.4 Overview of operating panel control modes
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