Hitachi YUTAKI Series Installation And Operation Manual page 68

ELECTRICAL AND CONTROL SETTINGS
6.3.2 Table board 2
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Indoor/outdoor communication wiring (TB2) / ATW-RTU Communication / Central Devices
Communication
• 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 in case
of split system and also connect the indoor unit with ATW-RTU or Central devices like ATW-TAG-02, ATW-KNX-02 and ATW-
MBS-02
• 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.
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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.
Input and output terminals give the possibility to configure the installation according to the needs of the user. The default settings
and I/O terminals reach most of the options necessary for an optimal performance of the system. Additionally, the settings can be
modified through the unit controller, and input/output terminals can be used, if required, to have additional options.
58 PMML0510 rev.1 - 10/2019
Indoor unit
1 2
Outdoor unit ATW-RTU /
1 2
Central Devices