Hitachi UTOPIA R32 Series - 12.1 General Considerations

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PMEN0654 rev.0 - 12/2023
12
GENERALCONSIDERATIONS
H-LINK II SYSTEM
12.1 General consideraons
The H-LINK II system can not be applied to the cycle with the old H-LINK model.
1 Applicaon
The H-LINK II connecng each indoor unit and outdoor unit for up to 64 refrigerant cycles, and
connecng wires for all indoor units and all outdoor units in series.
2 Specicaons
✓ Transmission Wire: 2-Wire.
✓ Polarity of transmission wire: Non-Polar wire.
✓ Maximum number of outdoor units to be connected: 64 units per H-LINK II system.
✓ Recommended number of indoor units to be connected: 64 Units per H-LINK II system.
✓ Maximum wiring length: total 1000 m (including CS-NET). In case that the total wiring length
is longer than 1000 m, contact the Hitachi dealer.
✓ Recommended cable: twist pair cable with shield, over 0.75 mm2 (Equivalent to KPEV-S).
✓ Voltage: 5 V.
Do not make a wiring in a loop.
3 DSW seng of indoor PCB and outdoor PCB.
It is recommended to set dip switches of every indoor unit and outdoor unit.