The ChangeOver6 and NovoCon ChangeOver6 are 6-port motorized ball valves that performs a diverting function between two water circuits in 4-pipe changeover system. This diverting function allows the cooling and heating capacity of a fan coil unit to be increased for the same compact size compared to a double coil model where the heating and cooling water circuits each have their own coil. The ChangeOver6 and NovoCon ChangeOver6 are 6-port motorized ball valves and not suitable for flow control. Flow is modulated by the AB-QM pressure independent balancing control valve to avoid overflow and reduced efficiency of boiler or chiller.