Hitachi YUTAKI S80 Series - Common Wiring; Electrical Wiring between Indoor and Outdoor Unit of the Air to Water Heat Pump System

10. Electrical wiring
TCGB0075 rev.0 - 11/2012
130
10.5 Common wiring
10.5.1 Electrical wiring between indoor and outdoor unit of the air to water heat pump
system
• Connect the electrical wires between the indoor unit and the outdoor unit, as shown in the next diagram.
• Use twist pair wires (more than 0.75 mm²) for operation wiring between outdoor unit and indoor unit.
• Use 2-core wires 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 obstacle at length of less than 300m and
size in compliance with local codes.
• In the event that a conduit tube for eld-wiring is not used, x rubber bushes to the panel with adhesive.
C A U T I O N
• Be sure to use a dedicated power circuit for the indoor unit. Never use a power circuit shared by another
appliance (Outdoor unit).
• Pay attention to the connection of the operating line. Incorrect connection may cause PCB failure.
• Alltheeldwiringandequipmentmustcomplywithlocalandinternationalcodes.
Operating Line
(Twisted shielded pair
cable or shielded pair
cable)
DC5V (Non-Pole
Transmission, H-LINK
system)
Operating Line
(Twisted shielded pair cable or shielded pair cable)
DC5V (Non-Pole Transmission, H-LINK system)
Optional
Optional
Tank thermistor
Tank’s electric
heater cable
LCD connector
LCD connector
TB
:
Terminal Board
CB
:
Circuit Breaker
ELB
:
Earthleakage Breaker
:
Internal Wiring
:
Field Wiring
:
Field-Supplied
1,2
:
Outdoor-Indoor connection