{"action":"opened","issue":{"url":"https://api.github.com/repos/NREL/EnergyPlus/issues/7285","repository_url":"https://api.github.com/repos/NREL/EnergyPlus","labels_url":"https://api.github.com/repos/NREL/EnergyPlus/issues/7285/labels{/name}","comments_url":"https://api.github.com/repos/NREL/EnergyPlus/issues/7285/comments","events_url":"https://api.github.com/repos/NREL/EnergyPlus/issues/7285/events","html_url":"https://github.com/NREL/EnergyPlus/issues/7285","id":439225296,"node_id":"MDU6SXNzdWU0MzkyMjUyOTY=","number":7285,"title":"Unit ventilator control problems","user":{"login":"mjwitte","id":4991075,"node_id":"MDQ6VXNlcjQ5OTEwNzU=","avatar_url":"https://avatars2.githubusercontent.com/u/4991075?v=4","gravatar_id":"","url":"https://api.github.com/users/mjwitte","html_url":"https://github.com/mjwitte","followers_url":"https://api.github.com/users/mjwitte/followers","following_url":"https://api.github.com/users/mjwitte/following{/other_user}","gists_url":"https://api.github.com/users/mjwitte/gists{/gist_id}","starred_url":"https://api.github.com/users/mjwitte/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mjwitte/subscriptions","organizations_url":"https://api.github.com/users/mjwitte/orgs","repos_url":"https://api.github.com/users/mjwitte/repos","events_url":"https://api.github.com/users/mjwitte/events{/privacy}","received_events_url":"https://api.github.com/users/mjwitte/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2019-05-01T16:23:30Z","updated_at":"2019-05-01T16:23:30Z","closed_at":null,"author_association":"CONTRIBUTOR","body":"Issue overview\r\n--------------\r\nZoneHVAC:UnitVentilator controls do not work as advertised.\r\n\r\n1. When there is no coil, VariablePercent is supposed to increase the OA to max when there is a cooling load and the outdoor air is colder than the zone. But the if logic is backwards for this case.\r\n\r\n2. Where there is a cooling coil, VariablePercent currently stays at minimum OA when there is a cooling load, as described in the I/O Reference. But this isn't really useful - with VariablePercent, the OA should increase to provide free cooling if there is a cooling load and conditions are favorable.\r\n\r\n3. If the user really wants a fan coil unit with economizer, the I/O Ref suggests using the unit ventilator. It would be better to just add some rudimentary economizer controls to the fan coil unit, because the fan coil unit has better control options in general.\r\n\r\n### Details\r\nSome additional details for this issue (if relevant):\r\n - Version of EnergyPlus 9.1.0\r\n - Helpdesk ticket number 15147.\r\n\r\n### Checklist\r\nAdd to this list or remove from it as applicable.  This is a simple templated set of guidelines.\r\n - [ ] Defect file added (list location of defect file here)\r\n - [ ] Ticket added to Pivotal for defect (development team task)\r\n - [ ] Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)\r\n\r\n"}}
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