Question-and-Answer Resource for the Building Energy Modeling Community
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Interesting runtime fraction plot (Picture 10). The cooling coil total cooling rate and cooling coil runtime fraction would have the same shape if the VRF system available capacity didn't change much. Look at 9/25 around 1 PM where the runtime fraction drops to 0.25 when the cooling coil total cooling rate is not much different than other times when RTF = 1. So what this means to me is that the cooling coil available capacity is severely reduced for some reason, most likely the performance curves.
The scheduling of the VRF TU's looks correct to me. They are always available and the fan operating mode schedule is set to constant fan. What is the availability schedule of the AirConditioner:VariableRefrigerantFlow? If it is off after hours, so will these TU's.
