Constant Flow Multizone Airloop without Reheat, Which Setpoint?

asked 2018-06-22 12:15:52 -0500

Saroop's avatar

updated 2018-06-23 10:43:57 -0500

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I am trying to model an multizone HVAC system that is constant flow with no reheat. I was looking at this post which is similar but has reheat and uses a scheduled setpoint. A scheduled setpoint won't work for my system since it needs to respond to zone conditions. I tried using Setpoint Manager Multi Zone Cooling Average but I am not sure how to place the Setpoint Manager Multi Zone Heating Average on the same node.

I think I am not using these setpoints correctly. I was looking at this reference and I'm not sure which node I am supposed to place these setpoints on. Are the correct nodes the ones that connect to the heating or cooling coil?

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I have the same issue with a model I've been working on, and I think I've tried every setpoint manager available. I am sort of able to get by using the SetpointManager:SingleZone:Reheat and setting the control zone as the thermal zone with the highest heating/cooling load. Of course, this becomes a problem when the system's peak heating and cooling loads are in different zones, so I often have to choose between a bunch of unmet heating hours in one zone or unmet cooling hours in another. Would love to know a better solution.

nsimhai's avatar nsimhai  ( 2018-09-13 11:05:50 -0500 )edit