They had left it out because there is a few ways you can wire the bed heater and it includes using the AC mains power that isn’t documented for international differences and safety hazards
I think this part is left to the user to figure out because they don’t give us any of the mains power instructions. one way to power it would be the hot or positive side goes straight to the relay and the ground side to the converter, but I have seen people power their beds separately because some of them can pull enough amps when combined with the rest of the printer to trip some breakers in 120V outlets
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They had left it out because there is a few ways you can wire the bed heater and it includes using the AC mains power that isn’t documented for international differences and safety hazards
I think this part is left to the user to figure out because they don’t give us any of the mains power instructions. one way to power it would be the hot or positive side goes straight to the relay and the ground side to the converter, but I have seen people power their beds separately because some of them can pull enough amps when combined with the rest of the printer to trip some breakers in 120V outlets