or the ignition detection control failing to send voltage to the gas valve

Using it with R-410A will result in incorrect pressure drops and potential equipment failure

What does a flashing LED on this board indicate

the 700-503 is a non-regulated valve

and up to 15 HP at 600V for three-phase motor loads

Armstrong Fluid Technology 116435MF-132 Pump 318973-401 or the ignition detection controlThe Armstrong Fluid Technology 116435MF 132 is a high performance three piece circulator pump designed for reliable fluid circulation in commercial and residential hydronic heating systems. As the updated maintenance free version of the 116435 132, this H52BF model features a robust 1 3 HP, 115V single phase motor equipped with built in thermal overload protection to ensure long term operational safety. Its cast iron body and non ferrous impeller