Hi, I'm trying to set up my Multiplus to have a water heater attached to L2 output, manually remotely switchable in VRM. So far, although the water heater is powered in this way, I can't find a way to switch it off. I have a Cerbo GX and have connected the Relay 1 (NC, NO, Com) to the same on the Multiplus. I have setup a relay switch in VRM. I can hear the relay switching in the CerboGX, but it has no effect on the L2 output.
I've seen discussions which suggest a combination of assistants are needed to accomplish this, but sadly the documentation has not been of much help and the assistants themselves are not very self-explanatory.
Can anyone offer any help or advice?