Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
(1) The Mixed Air SPM object you're trying to use is meant for air handlers, where the heat added by the supply fan is taken into account in order to deliver air at the desired setpoint temperature. Since you're using a unitary system, it might make more sense to use a Scheduled SPM instead.
(2) The best way to find the nodes with the UUID names is to open the OSM in a text editor and search for the UUID. My guess is that they are nodes associated with zone HVAC equipment like FCUs, since these don't show in OpenStudio HVAC diagrams where you can edit the node name.
