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When you press the button, you are only completing a circuit to ground. The timing part of it would be if you wanted it to go into comp mode at each startup. If you want all systems off at startup, that's even easier and can be done with a simple control relay.
I'd like to have my T/C deactivate at start up without having to push the button. Can I jumper the wires at the switch or is it more complicated? Thanks.