Hydronic air handler not heating

raricky

Looking for some advise on how to fix this!

I recently descaled my tankless heater and hydronic air handler connected to it.
Water through the taps is working fine but today I turned on the Heat and no hot air from the vents.
I can hear water moving through the pump and filling in the hydronic coils.

I read online that there might be a air pocket in the pump. But not sure how to bleed it out since there is no air bleed screw. I even tried bleeding it out from the valve on the hydronic furnace.

mattmia2

If you hear it there is probably air trapped in the hydroair coil. There may or may not be the right valves to block flow through the circulator and force flow from the municipal supply through the hydroair coil to purge the air out.

The circulator can just circulate water, it can't lift it through an air pocket in the coil.

raricky

@mattmia2 So how can I remove it? Shall that be done from the pump or the coils?

mattmia2

depends on what isolation valves and boiler drains you have. you need to isolate so the flow from the municipal supply goes through the coil and out a drain. Ideally they would have put those near the domestic water heater so you can purge the coil without actually going to it.

raricky

UPDATE- @mattmia2 It worked out. Connected a hose to the valve on furnace side and turned it ON. It removed all the air from the coils. Heat is back On.

Thank you so much for your responses!