Start-Up Guide - Grundfos CU331SP Installation And Operating Instructions Manual

11.3 Start-up guide

Check that equipment connected is ready for
start-up, and that the CU331SP has been
Note
Note
connected to the power supply.
Have nameplate data for motor, pump and
CU331SP at hand.
Use the start-up guide for the general setting of the CU331SP
including the setting of the correct direction of rotation.
The start-up guide is started the first time when the CU331SP is
connected to the power supply. It can be restarted in menu
GENERAL. Please note that in this case all previous settings will
be erased.
Bulleted lists show possible settings. Factory settings are shown
in bold.
11.3.1 Welcoming display
• Press OK. You will now be guided through the start-up guide.
11.3.2 Language
Select the language to be used in the display:
• English US
• French
• Spanish.
11.3.3 Supply Voltage
Select supply voltage according to the rated supply voltage of the
installation site.
Unit 1 X 200-240 V
• 1 X 200 V
• 1 X 208 V
• 1 X 220 V
• 1 X 230 V
• 1 X 240 V
11.3.4 Priming and venting
See the installation and operating instructions of the pump.
The general setting of the CU331SP is now completed, and the
start-up guide is ready for setting the direction of rotation:
• Press OK to go on to automatic or manual setting of the
direction of rotation.
11.3.5 Automatic setting of the direction of rotation
Warning
During the test, the pump will run for a short
time. Ensure no personnel or equipment is in
danger!
The CU331SP automatically tests and sets the correct direction
of rotation without changing the cable connections.
This test is not suitable for certain pump types and will in certain
cases not be able to determine for certainty the correct direction
of rotation. In these cases, the CU331SP changes over to manual
setting where the direction of rotation is determined on the basis
of the installer's observations.
Information displays.
• Press OK to continue.
The pump starts after 10 seconds.
It is possible to interrupt the test and return to the previous
display.
The pump runs with both directions of rotation and stops
automatically.
It is possible to interrupt the test, stop the pump and go to manual
setting of the direction of rotation.
The correct direction of
rotation has now been set.
• Press OK to set the setpoint
(8/11) See 11.3.6 Setpoint
The automatic setting of the
direction of rotation has failed.
• Press OK to go to manual
setting of the direction of
rotation.
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