Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I'd say the VAV terminal is allowing turndown below where the single speed coil can operate. I suggest that you try CoilCoolingDXTwoSpeed.
You should also click on the center line and double check that the SystemSizing object's field "Central Cooling Design Supply Air Temperature" is aligned with the temperature defined by the SetpointManagerScheduled schedule. That is you want to make sure the sizing parameters in SizingSystem are reasonably close to how you are trying to operate the system.
| | 2 | No.2 Revision |
I'd say the VAV terminal is allowing turndown below where the single speed coil can operate. I suggest that you try CoilCoolingDXTwoSpeed.
You should also click on the center line and double check that the SystemSizing object's field "Central Cooling Design Supply Air Temperature" is aligned with the temperature defined by the SetpointManagerScheduled schedule. That is you want to make sure the sizing parameters in SizingSystem are reasonably close to how you are trying to operate the system.
If you stick with the single speed coil, consider the terminal inputs for the zone minimum air flow fields. You can set it up so that the terminal does not reduce air flow below the ratio accepted by the coil.
