I am trying to model a PVVT system, that uses an air-cooled heat pump for
heating and cooling. For some reason, the system refuses to supply any heating.
When I change the condenser type from air-cooled to water-cooled, the system
WILL provide heat. Has anyone experienced problems like this, or has
someone successful modeled a PVVT air-cooled heat pump? I have attached my IDF
and PD2 file for review.