Service - Grundfos CU 351 Installation And Operating Instructions Manual

Pos. Terminal Designation
70 Relay 1
71 Relay 1
72 Relay 1
73 Relay 2
8
74 Relay 2
75 Relay 2
* GND is isolated from other ground connections
** External GENIbus connection (not standard)

11. Service

The CU 351 cannot be serviced. If the CU 351 is
faulty, the unit must be replaced. See 13. Replacing
the CU 351.
12. Maintenance
The CU 351 is maintenance-free during normal use
and operation. The CU 351 must only be cleaned
with a dust-free cloth.
13. Replacing the CU 351
• Switch off the power supply to the CU 351.
• Switch off the power supply to components with
external supply.
• Mark the individual conductors with the numbers
of the corresponding terminals.
• Disconnect all conductors.
• Remove the CU 351 from the panel/cabinet.
• Fit the new unit as described in 4. Mechanical
installation.
• Configure the new CU 351 by means of PC-Tool.
14. Dimensions
Fig. 10 Dimensional sketch
14
Data
C
NO
NC
C
NO
NC
15. Disposal
This product or parts of it must be disposed of in an
environmentally sound way:
1. Use the public or private waste collection service.
2. If this is not possible, contact the nearest
Grundfos company or service workshop.
Diagram
70
71
72
73
74
75
Subject to alterations.