LEGALLAIS HB200 Manuel De Mise En Service, D'opération Et D'entretien page 54

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Figure 7.4.-1. shows the electric connection diagram of the hot water tank, which can
also bee seen on the cover of the fitting house.
Figure 7.4.-1.
Figure 7.4.-3 Figure 7.4.-2.
.
The protective earthing has to comply with the instructions of IEC 60364.