Common Wiring; Electrical Wiring Between Indoor And Outdoor Unit Of The Air To Water Heat Pump System - Hitachi YUTAKI S80 Series Technical Catalogue

10. Electrical wiring

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 field-wiring is not used, fix 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 field wiring and equipment must comply with local and international codes.
TB Terminal Board
:
CB Circuit Breaker
:
ELB Earthleakage Breaker
:
:
Internal Wiring
:
Field Wiring
:
Field-Supplied
1,2 Outdoor-Indoor connection
:
130
TCGB0075 rev.0 - 11/2012
Operating Line
(Twisted shielded pair cable or shielded pair cable)
DC5V (Non-Pole Transmission, H-LINK system)
LCD connector
Optional
Tank's electric
heater cable
Tank thermistor
Optional
Operating Line
(Twisted shielded pair
cable or shielded pair
cable)
DC5V (Non-Pole
Transmission, H-LINK
system)
LCD connector