HVAC Schedule Flaw

[nixub-a]

Enhancement Request

The Always On Schedule for the HVAC System needs to become more fail-safe.

Detailed Description

I wanted to declutter my list of schedules. After deleting all of them, the simulation could not run. The following is the error message I received:

[openstudio.model.ControllerMechanicalVentilation] Object of type 'OS:Controller:MechanicalVentilation' and named 'Controller Mechanical Ventilation 1' does not have an Availability Schedule attached.

I could not find a solution online. I had to compare my old and new models' lines of code to notice the missing element. Long story short, one of the Always On Schedule that I deleted was critical for my HVAC system to work.

Possible Implementation

Someone might find themselves in the same position as me. I have a couple of potential fail-safe features.

One option is to add a new Always On Schedule input box in OS:AirLoopHVAC. That way, the user can insert a new schedule in case one was deleted.

The other option is to hide the Always On Schedule from the Schedule>>Other Schedule list to prevent someone from deleting it. It can only be deleted with the HVAC System.

[jmarrec]

If you delete all of your schedules, you're just shooting yourself in the foot, and there's not much we can do.

Also, this repo has nothing to do with the OpenStudioApplication.

I suggest your look at the BCL measure "Remove Orphan Objects and Unused Resources", the source is at https://github.com/NREL/openstudio-common-measures-gem/tree/develop/lib/measures/remove_orphan_objects_and_unused_resources