EnergyPlus chillerheater simultaneous heating cooling only

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Is there a way to make the CentralHeatPumpSystem with the ChillerHeaterPerformance:Electric:EIR work only in simultaneous cooling/heating mode (Mode 3). I've tried varying condenser loop capacity, using various plant equipment operation schemes, using the EMS manager to dispatch loads, etc., but never feel I can make it operate properly in simultaneous mode.