Weekend Setback in Detailed HVAC (VAV System)

Help and discussion on using the Detailed HVAC option

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Weekend Setback in Detailed HVAC (VAV System)

Postby maciejd » Wed Jul 12, 2017 2:40 pm


I have an issue with introducing weekend setback in VAV Air Handling System. The HVAC System which I drew is very simple, consists of generic AHU (no coils, only fans) and VAV box (no reheat) in the room. When the setback is on, supply airflow should be reduced to 30% of design flow rate. In the Air Loop Settings, I've set all flow rates manually (not autosize) as well as added setpoint manager (controlling mass flow rate) on the supply air duct to force the airflow setpoint. Unfortunately, it is not working, the supply air volume remains the same throughout the week. I don't really have a clue how to tackle that.

:?: :?:
Setpoint.JPG (53.66 KiB) Viewed 4878 times
AHU.JPG (47.83 KiB) Viewed 4878 times

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