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-   -   Rheem furnace question I couldn't answer! (http://www.diychatroom.com/f17/rheem-furnace-question-i-couldnt-answer-160596/)

how 10-19-2012 09:37 PM

Rheem furnace question I couldn't answer!
 
I saw a 10 yr+ mid efficiency Rheem Criterion RGDG-07EAUEA direct fire furnace to day that had a standard hot surface igniter but no visable proving system. (No flame rod)
I assume the proving system must be the change in the amp measurement of the hot surface igniter when it's immersed in main burner flame but couldn't find a readable schematic on site

Anyone know about this?
I hardly ever see Rheem furnaces.

Marty S. 10-19-2012 09:50 PM

They used the hot surface ignitor as a flame sense. Later versions added a flame sensor tied into the neutral wire of the ignitor as a booster.

ben's plumbing 10-20-2012 07:38 AM

hey how one of the 1 st rheem criterion furnaces had a standing pilot system with thermocupler saftey .....seen one about 3 months ago....still working but what a pile of junk

hvactech126 10-20-2012 10:32 AM

Quote:

Originally Posted by ben's plumbing (Post 1034402)
hey how one of the 1 st rheem criterion furnaces had a standing pilot system with thermocupler saftey .....seen one about 3 months ago....still working but what a pile of junk


Ben, and now you know why those inducers always had that little port at the bottom. :thumbup: I have a seen a Payne model with the same type of standing pilot and hood that goes to the inducer for venting the pilot.


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