CTC EcoAir 10 Mode D'emploi page 17

Connect RK 1.5 between L1 and fuse L.
Check that the cable is firmly attached.
Fit the red plug-in bridge between N - N. With a
1-phase version of CTC EcoAir, N - N is bridged using a
blue RK 1.5 instead of a plug-in bridge.
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