One floor loop not heating

bdohrn

One loop of my hydronic floor heat is not warming up at present. I tried to purge the zone but when I attached the garden hoses to the webstone purge valve (having closed the main valves to isolate the zone) nothing moved. Per the designer of this system’s instructions for initial filling, I closed two of the flow meters and opened two including te problematic one. No water came out of the return…. I’m not sure if the hose I used should have been bigger so as to make more pressure?

Any thoughts on other reasons that the loop might be non responsive? The others are working….

hot_rod

look like only one of the white actuators is open in that pic. The top pops out with a green ring. How are you opening the others?

The ball valve on the pressure bypass needs to be closed when purging also.