I built several VRF systems with DOAS using OpenStudio 1.7.0. VRF is used to deal with cooling/heating load, and all the fresh air from DOAS system. I tried to setup the "Outdoor Air Flow Rate During Cooling Operation" of vrf air thermail to 0 in OpenStudio, but when I came back, it will be "autosize" again. And simulation results showed that the outdoor air was double actullay, one from vrf and one from DOAS. I had to use text file editor to close the outdoor air of VRF. Is there something wrong? Thanks.
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