Hi, thanks in advance for your response. I am not a plumber. Just a dude who is trying to maintain his heating system and attempt it myself.
I have a NHB-055 on one heating zone. I had a leak in my expansion tank. I installed a new one. Now I want to purge any air I let in from my single zone loop. However, the make water won't go past the pump on the left through the zone and back down in return to the drain valve hose at the bottom left.
I closed the return valve going into boiler and system valve coming out of boiler to isolate the heating loop to purge. However, Make up water doesn't go through loop it goes directly to the right and out of drain house.
What am I missing? A shut of valve between air separator and drain valve?
How'd they get the water in and pressurized correctly?
I have a NHB-055 on one heating zone. I had a leak in my expansion tank. I installed a new one. Now I want to purge any air I let in from my single zone loop. However, the make water won't go past the pump on the left through the zone and back down in return to the drain valve hose at the bottom left.
I closed the return valve going into boiler and system valve coming out of boiler to isolate the heating loop to purge. However, Make up water doesn't go through loop it goes directly to the right and out of drain house.
What am I missing? A shut of valve between air separator and drain valve?
How'd they get the water in and pressurized correctly?
