Grundfos LC 242 Notice D'installation Et De Fonctionnement page 33

Appendix B
B.1. Standard options for LC 24X
Option BB: backup battery
Option D: Fault light system
Option H: ON/OFF/AUTO switch
Option M: IO 241
Option N: DIN mount electrode-relay for four electrodes and REF (CLD4MA2DM24)
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