System Wiring Diagram; Outdoor And Indoor Unit Electrical Wiring - Hitachi UTOPIA R32 Series Technical Catalogue

10 Electrical wiring

System wiring diagram


DSW6: No setting is required (do not change)
Factory setting

DSW7: No setting is required (do not change)
Factory setting
10.4 System wiring diagram

10.4.1 Outdoor and indoor unit electrical wiring

• Connect the electrical wires between the indoor unit and the outdoor unit as show in the figure.
• When installing the electrical wiring, follow local codes and regulations.
• The refrigerant piping and the control wiring are connected to the units in the same refrigerant cycle.
• Use shielded twisted pair cable (more than 0.75 mm
and operation wiring between indoor unit and indoor unit.
• Use a 2-core wire for the operating line (do not use wire with more than 3 cores).
• Use shielded wires for intermediate wiring to protect the units from noise interference at lengths of less than 300 m.
The size must comply with local code.
• Open a hole near the connection hole of power source wiring when multiple outdoor units are connected from a
single power source line.
• The recommended breaker sizes are detailed in the
• In the case that a conduit tube for field-wiring is not used, fix rubber bushes with adhesive on the panel.
• All field wiring and equipment must comply with local and international codes.
• H-LINK twist pair shielded cable must be grounded in the outdoor unit side.
105 TCGB0136 rev.1 - 05/2021
RAS-(4-6)H(V)(R/N)C2E RAS-(4-6)H(V)(R/N)P2E
RAS-(4-6)H(V)(R/N)C2E RAS-(4-6)H(V)(R/N)P2E
) for operation wiring between the outdoor unit and indoor unit,
2
"10.4.2 Wire size" section.
10