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Is my Modcon plumbed correctly?
Hello heating pros. I have a question about my new to me home. It has a buderus GB142-45 heating a 4200 sq ft home. With all in floor pex radient. The reason why I am wondering if it was plumbed correctly is that it’s using a tekmar 361 to control the boiler and mixing pump. The 361 wants to run the boiler at 190+ degrees and I know to get max efficiency I need to be closer to 120ish correct?
It seems from my research the boiler was installed in 2005/2006 prior to the am10 outdoor reset. The 361 does have a outdoor reset and will pull back the mixing pump when it sees to high heat in the pipes. That ofcourse causes the buderous to over temp and shut down since I had manually set the temp for 120 degrees. Since that seems to be the only wat to keep it in its efficiently range.
Any ideas would be very helpful.