Prime the heating zones in aquahot AHE 100 S

[bmulvenna@hotmail.com]

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.

 

 

[Ivan K]

All our zones ran just fine after refilling, just topped the tank up afterwards. The pressure of hot coolant plays a role I suppose.

[bmulvenna@hotmail.com]

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 

[Ivan K]

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.

[bmulvenna@hotmail.com]

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?

[Ivan K]

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.

[gjh2916]

Attached is a PDF file out of the AquaHot Service Manual for bleeding the interior zones of a AHE 100S

AquaHot Bleeding Procedures.pdf

[CTerry]

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.

[bmulvenna@hotmail.com]

Thanks to all who have responded. I will give the suggestions a try.

Edited September 20, 2021 by bmulvenna@hotmail.com
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