If I send the iron chest signal using a red wire into an assembling machine and enable "Set recipe" in the circuit network settings of the assember, the assembler tries to use the recover open chest recipe. Could you please make the vanilla iron chest recipe and the recover open chest recipe available with separate signals?

I don't know why the recover open chest recipe overwrites the vanilla one, but it looks like the way most modders get around this is by un-hidding the old recipe in the signal selection GUI. I'll add that in the next version

Thank you for the fix. I can now craft iron chests using a circuit-controlled recipe. However, there are now two signals called “Iron chest”, which is confusing. It would be great if you could rename at least one of those signals.

Ideally I'd also prefer if the default recipe was the one that crafts iron chests from iron plates, so that the iron chest item signal sets this recipe, but I don't know if you can achieve that. I'll probably need an extra combinator to work around the current setup in my circuit-controlled mall, but that's still better than the old version of the mod where I needed an extra assembler as a workaround.

As far as I know the name of the signal is determined by the product of the recipe so I don't think I can rename it. I'm not sure how Factorio determines which recipe becomes the default, but since it chose the recovering recipe the fix I did was to un-hide the default recipe in the signals list. Like you're saying, the perfect fix would be to keep the normal iron chest recipe default and un-hide the recovering recipe, but I'm not sure how to do that at the moment. I may have to ask other modders more familiar with the code than me lol