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Weird Hydronic Anomaly Part 2 Confused in Pittsburgh
Ok so I have had a couple of hydronic projects where the boiler seems to run forever without raising the temperature of the loop. The boilers are piped primary secondary. Once I close the flow through the boiler so the boiler temperature raises to close to 170-180, the loop temperature starts to rise. I posted something a few weeks backs about this. Well, I thought it was a fluke and the other day, I was at the job site and decided to experiment. I allowed the loop temperature to drop about 20 degrees below the setpoint of the controller. I opened the valve and allowed full flow through the boiler. The loop temperature never rose after 20 minutes. I closed the valve to the boiler so the internal water temperature of the boiler rose close to 170 degrees. Once I did that, the loop temperature rose twenty degrees within 15 minutes. Now, I am really confused. I plan on repeating this soon. Any thoughts?
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