Hopefully this may help the next person: after trip drain system fully from main drain and there is a aux drain on the side by the gauges drain that as well after its drained close the aux drain push down on the plunger this will seat the clapper turn on compressor and fill with air. YOU HAVE TO LEAVE MAIN DRAIN OPEN WHEN FILLING WITH AIR once filled with air Crack open the water control valve until water is flowing and close the drain then open water fully. If you have the main drain closed the valve will trip when putting air back on the system. None of the videos I watched told that part and I tripped the valve 3 times before I finally figured that part out.
Hopefully this may help the next person: after trip drain system fully from main drain and there is a aux drain on the side by the gauges drain that as well after its drained close the aux drain push down on the plunger this will seat the clapper turn on compressor and fill with air. YOU HAVE TO LEAVE MAIN DRAIN OPEN WHEN FILLING WITH AIR once filled with air Crack open the water control valve until water is flowing and close the drain then open water fully. If you have the main drain closed the valve will trip when putting air back on the system. None of the videos I watched told that part and I tripped the valve 3 times before I finally figured that part out.
Too much talking but no too much info !!!