My furnace has recently developed never before seen problems, consistent with overly high output temperatures. I'm not yet sure whether my HVAC company considers them resolved. After I last spoke with them, I thought of a few questions that will help me to better understand the situation and what they've told me. Perhaps you could help me.
My 3-stage 355CAV-060's tag lists air temp rise as:
Low: 35-65 F
Med: 50-80 F
High: 35-65 F
If you wanted to arrive at appropriate output temp ranges, would you simply add return temp to those? IOW, if we assume a properly measured return temp of 70F, can we do this:
Low: 35+70 to 65+70 = 105F to 135F
Med: 50+70 to 80+70 = 120F to 150F
High: 35+70 to 65+70 = 105F to 135F
to project what the corresponding, properly measured supply temp ranges would be?
The tag also lists "Design Max Outlet air temp":
I haven't found a definition for that. Might this be the absolute maximize output temperature the equipment is designed to withstand, and therefore a temperature which basically should never be seen on the supply side during a heat rise measurement?
I haven't found information about the limit switch and the temperature at which it should open. Does anyone know where I would find that info, or might someone have it handy?
Thank you in advance, I'll followup up.