![Hitachi RWM-3.0NERWM-4.0NE Instruction Manual Download Page 21](http://html.mh-extra.com/html/hitachi/rwm-3-0nerwm-4-0ne/rwm-3-0nerwm-4-0ne_instruction-manual_2139432021.webp)
ENGLISH
!
C A U T I O N
•
Ensure specifically that there is an Earth Leakage Breaker (ELB) installed for the units (outdoor and indoor unit).
• If the installation is already equipped with an Earth Leakage Breaker (ELB), ensure that its rated current is large enough to hold the current of the
units (outdoor and indoor unit).
?
N O T E
• Electric fuses can be used instead of magnetic Circuit Breakers (CB). In that case, select fuses with similar rated values as the CB.
• The Earth Leakage Breaker (ELB) mentioned on this manual is also commonly known as Residual Current Device (RCD) or Residual Current
Circuit Breaker (RCCB).
• The Circuit Breakers (CB) are also known as Thermal-Magnetic Circuit Breakers or just Magnetic Circuit Breakers (MCB).
5.4 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.
1
1
2
2
Indoor unit
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.
ELECTRICAL AND CONTROL SETTINGS
PMML0336B rev.1 - 03/2016
13