System Wiring Diagram; Transmission Wiring Between Outdoor And Indoor Unit - Hitachi RWH-4.0VNFE Instruction Manual

ELECTRICAL AND CONTROL SETTINGS

5.2 SYSTEM WIRING DIAGRAM

Connect the units according to the following electric diagram:
:
TB Terminal board
:
CB Circuit breaker
:
ELB Earth leakage breaker
:
Internal wiring

5.3 TRANSMISSION WIRING BETWEEN OUTDOOR AND INDOOR UNIT

• 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.
15 PMML0340B rev.1 - 03/2016
:
Field wiring
:
Field-supplied
:
1,2 Outdoor-Indoor communication
Outdoor unit
Operating Line
RAS-WHVNP(E)
(Twisted shielded pair cable or
shielded pair cable)
DC5V (Non-Pole Transmission,
H-LINK system)
Indoor unit
RWH-VNF(W)E
Optional
Indoor unit
1 2
Outdoor unit
1 2
Outdoor unit
RAS-WHNPE
Unit controller cable
Tank's thermistor cable
Tank's electric heater cable
Operating Line
(Twisted shielded
pair cable or shielded
pair cable)
DC5V (Non-Pole
Transmission,
H-LINK system)
Indoor unit
RWH-NF(W)E
Optional