Clicking the "Import data..." button in the umi results viewer allows the importation of arbitrary data into an umi project. A new window will be shown:
Click "Browse..." and navigate to the .csv file describing the data you want to import. The file format is such that each column represents a data series to import. The first row should be a building name, the second should be a metric name, the third should be metric units, and the rest are series entries. (This is the same format in which data is exported from the viewer via the "Export displayed data..." button.) Once a file is selected, umi will parse it and display the metrics it found:
Make sure the "Import?" checkbox is checked for each series you want, and click "Import selected info" to import the data into the current project. (If a series is assigned to a building name that does not exist in the current document, its "Import?" checkbox wil be greyed out and disabled.) These data can now been plotted in the viewer.