Refrigerant pipe connection port diameter
[Unit: mm(inch)]
                              MODEL                                              GAS                                LIQUID
                       ARNU76GB8A4                                  Ø19.05(3/4)                        Ø9.52(3/8)
                       ARNU96GB8A4                                   Ø22.2(7/8)                         Ø9.52(3/8)
LOC.  Description  PCB Connector (Color) 
Th1  Thermistor for room air temperature  CN-ROOM (Yellow) 
Th2  Thermistor for pipe in temperature  CN-PIPE_IN (White) 
Th3  Thermistor for pipe out temperature  CN-PIPE_OUT (Red)