BMulvenna Posted September 16, 2021 Share Posted September 16, 2021 2004 Dynasty with aquahot AHE 100 S. Along with annual maintenance we just replaced the 16 gallons of boiler antifreeze. Since the three heating zones do not self prime, does anyone have the procedure to prime each of the zones? Thanks in advance. Link to comment Share on other sites More sharing options...
Ivan K Posted September 16, 2021 Share Posted September 16, 2021 All our zones ran just fine after refilling, just topped the tank up afterwards. The pressure of hot coolant plays a role I suppose. Link to comment Share on other sites More sharing options...
BMulvenna Posted September 17, 2021 Author Share Posted September 17, 2021 18 hours ago, Ivan K said: All our zones ran just fine after refilling, just topped the tank up afterwards. The pressure of hot coolant plays a role I suppose. I have read that the zone pumps are not self priming. I ran one for quite awhile but no heat. Any other suggestions? Thanks Link to comment Share on other sites More sharing options...
Ivan K Posted September 17, 2021 Share Posted September 17, 2021 Tap the backflow valve above the pump. If you get coolant expanding with heat into to expansion tank, it should have filled the pumps well before there is enough pressure to overflow. Link to comment Share on other sites More sharing options...
BMulvenna Posted September 17, 2021 Author Share Posted September 17, 2021 38 minutes ago, Ivan K said: Tap the backflow valve above the pump. If you get coolant expanding with heat into to expansion tank, it should have filled the pumps well before there is enough Thanks. You are referring to each zone pump correct? Link to comment Share on other sites More sharing options...
Ivan K Posted September 17, 2021 Share Posted September 17, 2021 Yes, at the outlet of zone pumps while they are running. Specifically the one(s) where the line out to registers does not feel warm. They like to stick closed once a while, if not in use for a while. Link to comment Share on other sites More sharing options...
gjh2916 Posted September 18, 2021 Share Posted September 18, 2021 Attached is a PDF file out of the AquaHot Service Manual for bleeding the interior zones of a AHE 100S AquaHot Bleeding Procedures.pdf Link to comment Share on other sites More sharing options...
CTerry Posted September 18, 2021 Share Posted September 18, 2021 Download the service manual from AquaHot. I had my unit out of the motorhome to repair a leak at the back of it. When putting it back in I came across the part about bleeding the air out of the lines. It's been awhile but as I remember there is a way to start the pumps without the electric or diesel heat being on. You don't want either to turn on if you had an air lock in the hoses and it clears and the coolant level drops. As they explained it this was pretty important. Link to comment Share on other sites More sharing options...
BMulvenna Posted September 19, 2021 Author Share Posted September 19, 2021 (edited) Thanks to all who have responded. I will give the suggestions a try. Edited September 20, 2021 by bmulvenna@hotmail.com Spelling Link to comment Share on other sites More sharing options...
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