Trying to figure out my tankless unit out. I have it set up for a hydronic in floor system, closed loop. 3 loops under 270' ea, expansion tank and circ pump. I can get it up to 15psi and it initiates the circ pump but it never fires anymore, I had it running for 5 minutes initially, then intermittently for a couple hours and now, 2 weeks later, it doesn't do anything. Coded p1 and 11 and now 76, comm error, now I am at a loss.
Rheem closed loop in floor heating
- Thread starter robbied
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Fitter30
Well-Known Member
What control are u using to cycle the pump turn the boiler on? Complete model of boiler ? And some pics of boiler and piping.
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Its a rheem 199k btu Condensing natural gas, model number RTGH-95DVLN-2. Rheem controller cycles the Taco pump
007 Cast Iron Circulator, 1/25 HP . Having issues loading pic.
Fitter30
Well-Known Member
When has unit been serviced? can find some more info on you tube
Code1 inlet filter dirty
Code 11 not firing air filter could be blocked, igniter has a problem or burner dirty
Code 76 communication problem main board
15psi way to much presssure. What is it at when pump off and below 100°. The expansion tank could have the wrong air charge or be bad. Air charge should match boiler pressure.
Code1 inlet filter dirty
Code 11 not firing air filter could be blocked, igniter has a problem or burner dirty
Code 76 communication problem main board
15psi way to much presssure. What is it at when pump off and below 100°. The expansion tank could have the wrong air charge or be bad. Air charge should match boiler pressure.
