As seen in the pictures, our setup includes a 5-ft straight vertical run into the heat exchanger, with a flow switch and acquastat inline. Then flow switch and acquastat are wired together so that either can trip the boiler (e.g., if pump is off and there's no flow, zone should not call for heat). All equipment is new but the flow switch does not work, the zone stays on even when pump is off. Any immediately obvious reason as to why? Is it just wired incorrectly with acquastat?Thanks.