I am using a measure which helps me troubleshoot unmet hours. I have satisfied all of the prompts but I still have about 1000 unmet heating hours. Looking at the helpful graphs and ResultsViewer, I see an interesting pattern that I want to ask about. This graph is for one of two lab zones on my VAV with Reheat HVAC system. Both zones look identical.
For whatever reason, my zone does not want to heat very well and the "valleys" of my actual zone temperature appear to align very well with patterns in ResultsViewer that I see for my boiler supply temperature which is set via a setpoint schedule that I have made flat year-round at 180 degrees F as well as outside air temperature. See below. The middle valley occurs on July 27 at 13:00 (14:00 for OA temp, but why would I have -6 degrees C (21.2 deg F) OA in the dead of Summer? I have made certain that I am using .EPW and .DDY files for Livermore, CA.
Can anyone surmise what the heck is going on here? I don't understand why my actual zone temperatures top-out at my heating setpoint instead of bottoming-out at my heating setpoint. Very weird.
