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I would like to model a single zone CAV system with constant SA temp. It will cycle on and off to meet the load. I tried with adding single zone heating setpoint manager (min=max=95F) after Heating Coil and single zone cooling setpoint manager (min=max=55F) after Cooling coil. However, when I looked at the node temperature, it seems like the heating coil tries to heat the air to 95F first and then the cooling coil tries to cool it down to 55F afterwards. So both coils are working simultaneously and it always supply 55F to the room even though the room needs heating.

This is how my system set up

OA mixed with return air->Fan->HC->CC->Room

Also, how do I make the fan cycle on and off in a CAV system, does it do that automatically when no ventilation is required?

Thanks in advance

I would like to model a single zone CAV system with constant SA temp. It will cycle on and off to meet the load. I tried with adding single zone heating setpoint manager (min=max=95F) after Heating Coil and single zone cooling setpoint manager (min=max=55F) after Cooling coil. However, when I looked at the node temperature, it seems like the heating coil tries to heat the air to 95F first and then the cooling coil tries to cool it down to 55F afterwards. So both coils are working simultaneously and it always supply 55F to the room even though the room needs heating.

This is how my system set up

OA mixed with return air->Fan->HC->CC->Room

Also, how do I make the fan cycle on and off in a CAV system, does it do that automatically when no ventilation is required?

Thanks in advance