Okay, but I meant, what is using this schedule, i.e. what does it represent? Is it seems like an on/off of some componant. Or wait...it looks like a window opening schedule.
Further, I don't understand what a window schedule has to do with an HVAC airloop.
Also, I suggest using afterpredictor.
Also, if the zone temp falls below your threshold on the next timestep, the window will close, and on the next the room will heat up past the setpoint again and the window will open, i.e. open,close,open,close,open,close,etc. You need two thresholds...one to open and one to close.