I'm just installing my irrigation system and I'm currently sketching out the programs and runtimes.
I have a usecase, where I would like to run two zones at the same time during vacation. This is a zone which should automatically water plants on our terrace. Since the flow rate is very low, this would - over time - negatively impact the livetime of the pump. (Grundfos SQ2-55).
There has been some discussion about that already in these threads:
The main reason seems to be a thermo fuse on the PCB. Can someone tell me which fuse it is exactly?
I was thinking of running the valves via relays. Like the Eltako KR09-24V UC. The consumption of this relay is so low, that the RM should have no problems at all, running severals at once.
Add a "relay" mode to the software, which removes the restriction to run only on (two including master valve). You could even log that somehwere on the machines NVM, for warranty reasons, etc.
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