This unitary air loop is similar to the Generic single duct air loop but instead of a Generic air handling unit, the supply sub-loop contains a Packaged unitary heat pump water to air component which incorporates an On/Off fan component, a WaterToAirHeatPump cooling coil component, a WaterToAirHeatPump heating coil component. The source side (water) of the heat pump is connected to a condenser loop with a heat exchanger (ground heat exchanger or other type) or a plant loop with a heating source such as a boiler and a cooling source such as a chiller or cooling tower.
The image below shows a unitary heat pump water to air connected to a Zone group.
See also Air Loop Data