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The standard recommendation for this is to use a heat pump water heater for the heating mode with an air cooled chiller for the cooling mode. If you want to keep your present configuration and control a plant loop to track outdoor air temperature, I can think of three options:

  1. Put district heating and cooling objects on the loop and use SetpointManager:FollowOutdoorAirTemperature and remove the district heating/cooling energy in postprocessing.

    1. Use a large FluidCooler:SingleSpeed along with SetpointManager:FollowOutdoorAirTemperature. This should approach the outdoor dry-bulb temperature if the fluid cooler is large enough, and you can set the power inputs to zero or post-process.

    2. Use PlantComponent:TemperatureSource with a Schedule:File that contains the hourly outdoor dry bulb temperatures.

As a side note, a central plant air-to-water heat pump is on the list of planned development projects for FY15.

The standard recommendation for this is to use a heat pump water heater for the heating mode with an air cooled chiller for the cooling mode. If you want to keep your present configuration and control a plant loop to track outdoor air temperature, I can think of three options:

  1. Put district heating and cooling objects on the loop and use SetpointManager:FollowOutdoorAirTemperature and remove the district heating/cooling energy in postprocessing.

    1. Use a large FluidCooler:SingleSpeed along with SetpointManager:FollowOutdoorAirTemperature. This should approach the outdoor dry-bulb temperature if the fluid cooler is large enough, and you can set the power inputs to zero or post-process.

    2. Use PlantComponent:TemperatureSource with a Schedule:File that contains the hourly outdoor dry bulb temperatures.

As a side note, a central plant air-to-water heat pump is on the list of planned development projects for FY15.