Terminal Board Connections - Hitachi YUTAKI Series Instruction And Operation Manual

ELECTRICAL AND CONTROL SETTINGS

7.4 TERMINAL BOARD CONNECTIONS

7.4.1 Table board 1
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Main power supply
The main power supply connection is wired to the Terminal board (TB1) as follows:
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Indoor/outdoor communication wiring (TB2)
• The transmission is wired to terminals 1-2.
• The H-LINK II wiring system requires only two transmission cables that connect the indoor unit and the outdoor unit.
• Use twist pair wires (0.75 mm²) for operation wiring between outdoor unit and indoor unit. The wiring must consist of 2-core wires
(Do not use wire with more than 3 cores).
• Use shielded wires for intermediate wiring to protect the units from noise interference, with a length of less than 300 m and a 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
Ensure that the transmission wiring is not wrongly connected to any live part that could be damaged the PCB.
103 PMML0335A rev.1 - 04/2016
Outdoor unit
RAS-WHVNP(E)
(Twisted shielded pair cable or shielded pair cable)
DC5V (Non-Pole Transmission, H-LINK system)
YUTAKI S
Indoor unit
1 2
Outdoor unit
1 2
Outdoor unit
Operating Line
RAS-WHNPE
Operating Line
(Twisted shielded
pair cable or
shielded pair
cable)
DC5V (Non-Pole
Transmission,
H-LINK system)
YUTAKI S