Hello,
I am using a Coil:Heating:DX:SingleSpeed to simulate a heat pump conditioned building. The building is a IECC 2006 prototype building model. The building model has been modified to remove all domestic hot water distribution loop. Special modification is done on the Supplemental Heating Coil to make it a hot water based one using the Coil:Heating:Water object. A plant loop has been created to supply hot water to the supplemental coil to respond to any supplemental heating demand request. However, when I run the simulation, the supplemental coil is not responding. Zone temperature (LIVING_UNIT1) is falling abruptly when heat pump is unable to satisfy load. I am uploading the .idf file here. I will appreciate any expert opinion on this. Thanks.
-Abir Ahsan
