I want to add HeatExchanger:AirToAir:SensibleAndLatent to AirLoopHVAC:DedicatedOutdoorAirSystem, but I have a problem. Let me explain using an ExampleFile SmallOffice_CentralDOAS.idf. I added HeatExchanger:AirToAir:SensibleAndLatent as illustrated below. Here is the revised idf file (V9-6-0).

When I set Supply Air Outlet Temperature Control of HeatExchanger:AirToAir:SensibleAndLatent to "No", there is no error and the simulation completes sucsessflly. However, when I set Supply Air Outlet Temperature Control to "Yes", the following severe error occurs and the simulation terminates even though I add a temperature setpoint with SetpointManager:Scheduled.
** Severe ** Missing temperature setpoint for HeatExchanger:AirToAir:SensibleAndLatent "HEX" :
** ~~~ ** use a Setpoint Manager to establish a setpoint at the supply air outlet node of the Heat Exchanger.
** Fatal ** Previous condition causes program termination.
At first, the same error occurred in another energy model which was much more complecated, so I tested with the simple ExampleFile to clarify the cause.
I tried several things such as adding OutdoorAir:Mixer and Controller:OutdoorAir which are usually not required for AirLoopHVAC:DedicatedOutdoorAirSystem. I also tried changing SetpointManager:Scheduled to SetpointManager:MixedAir, but they were all in vein. Any suggestions?


