Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
The warnings show that the water temperature is -10.99 C. This is obviously wrong and something in the simulation is causing the water-to-water heating coil to turn on when the plant is unable to sufficiently heat the water loop. To help determine the cause add:
Output:Diagnostics, ReportDuringWarmup;
Then add Output:Variable reports for the plant loop water inlet and outlet nodes, the equipment performance reports for the plant loop equipment, and the water-to-water coil reports for air and water side nodes.
After the simulation is complete open the variables report and review the performance of the HVAC and plant. I suspect you will find that the plant is not operating as expected during the warmup period and the plant temperatures are too low for some reason.
