Pressure Setting; Button Locking; Alarm Functions - Grundfos CU 301 Notice D'installation Et De Fonctionnement

4.3 Pressure setting

The two arrow buttons on the CU 301 front are used
for the pressure setting. See fig. 13.
bar
5.0
4.5
4.0
3.5
3.0
2.5
2.0
Fig. 13
Indication of pressure setting
The system pressure set is indicated by a yellow
indicator light, which is permanently on.
Setting range: 2, 2.5 ... 5.0 bar.
Arrow-up button
When this button is pressed, the system pressure
setting is increased in steps of 0.5 bar.
Arrow-down button
When this button is pressed, the system pressure
setting is decreased in steps of 0.5 bar.
12

4.4 Button locking

The buttons on CU 301 can be locked or unlocked by
pressing the two arrow buttons simultaneously for 5
seconds or by using Grundfos GO Remote.
When the arrow buttons are used for locking, the
bar
5.0
pressure setting may change.
4.5
Use the following procedure:
4.0
1. Set the pressure one step up.
3.5
2. Press the arrow-down button as the first one
3.0
when pressing the two buttons.
2.5
2.0
Fig. 14
When the buttons are locked, the indicator light is
permanently on. See fig. 14. See also section
5.3.10 Buttons on

4.5 Alarm functions

CU 301 continuously receives operating data from
the pump. The alarm functions indicated on the CU
301 front are described in the following sections.
bar
5.0
4.5
4.0
3.5
3.0
2.5
2.0
product.