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• Non-polarized control wiringbetween outdoor and indoor unitsOutdoor unitU1 U2<strong>Indoor</strong> unitU1 U2 U1 U2 U1 U28F7Fmain heat exchangerSub heat exchangerOutdoor unitFS unit<strong>Indoor</strong>unitHeating Cooling Cooling Cooling• Simultaneous operationCompressor2FOutdoorunitAllowable pipe length :125m equivalent lengthHeight difference between indoorunit and outdoor unit : 50mHeight difference between indoorunit and indoor unit : 35m1st branchingsection1FFrom 1st branching to thefarthest indoor unit : 50m4