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To connect one outdoor unit to multiple indoor units, take a look at the Variable Refrigerant Flow Equipment objects. You will need to use the following:

AirConditioner:VariableRefrigerantFlow - this is the outdoor unit

ZoneTerminalUnitList - this is a list of indoor units. The outdoor unit will reference this list so that it knows which indoor units it is connected to.

ZoneHVAC:TerminalUnit:VariableRefrigerantFlow - this is the indoor unit, and is used instead of the PTHP.

Coil:Cooling:DX:VariableRefrigerantFlow and Coil:Heating:DX:VariableRefrigerantFlow - these are the variable refrigerant cooling and heating coils. Each ZoneHVAC:TerminalUnit:VariableRefrigerantFlow will need one cooling and one heating coil.

The example file: "DOASDXCOIL_wADPBFMethod.idf" shows an implementation of these objects.