Electrical Installation; User Interface - Grundfos Hydro Multi-B Instrucciones De Instalación Y Funcionamiento

7.2 Electrical installation

Warning
The electrical installation must be carried out by
an authorised person in accordance with local
regulations and the relevant wiring diagram.
• The electrical installation of the booster system must comply
with enclosure class IP54.
• Make sure that the booster system is suitable for the power
supply to which it is to be connected.
• Make sure that the wire cross-section corresponds to the
specifications in the wiring diagram.

8. User interface

The Hydro Multi-B incorporates a CU 323 control unit which enables manual setting and monitoring of the booster system.
Figure 8 shows the user interface for a system with four pumps.
CU 323
4
OFF
3
OFF
2
OFF
1
OFF
WS
RESET
7
User interface of cabinet and CU 323
Fig. 8
Pos. Buttons
1
On
Off
2
3
4
RESET
5
6
7
12
On
AUTO Off
14
AUTO
AUTO
AUTO
PT
5
system run
alarm
6
10
4
Description
Changes the system operating mode between "Normal" and "Stop".
Increases the setpoint value.
Decreases the setpoint value.
Resets all alarms.
Changes the operating mode of the individual pumps between "AUTO" and "OFF".
Each pump in the system has an Auto/Off button.
Enables manual operation.
Note: If a pump is set to manual operation, it will run at 100 % speed, and the power supply to the
CU 323 will be switched off.
Switches the power supply to the control cabinet on or off.
CU 323
4
OFF AUTO
3
OFF AUTO
2
OFF AUTO
1
OFF AUTO
WS
RESET
12
13
1
On
Off
2
8
3
11
PT
9
15
system run
16
alarm