I've got a VAV system with Reheat serving multiple zones: 4 offices and a corridor on the same floor. The corridor is producing unmet hours during nighttime operation.
- My
Tolerance for Time Heaitng Setpoint Not Metis 1K (1.8R). - The setpoint is 14.44°C // 58°F.
- While the zone temperature is around 14°C, so that $\Delta T < ReportingTolerance$ I still get unmet hours.
See this graph, where:
- Black is
Zone Air Temperature - Light blue/turquoise is
Zone Thermostat Heating Setpoint Temperature - Darker blue/marine is
Zone Heating Setpoint Not Met
What's going on?
Bit of context: this zone is served together with 4 others by a VAV system for which there's an AvailabilityManager:NightCycle (thermostat tolerance is 1°C) and Outdoor Air is turned off between D at 10pm and D+1 at 6am. Two zones out of 5 do produce more unmet hours than the others (one office and this one being a corridor).
