I think you are reading the Taco 007 pump curve chart correctly http://www.taco-hvac.com/uploads/Fil...ry/100-1.8.pdf.
Interesting chart here http://www.csemag.com/single-article...97efe75bd.html
What is your actual return temperature?
Return temps vary with output temps but as mentioned earlier they are in the range of 5-8* lower.
This seems to be true on both the primary and secondary loop
Last edited by tom3holer; 03-25-2013 at 05:40 PM.