Hitachi PSC-6RAD Manuel D'installation page 9

3.
ELECTRICAL WIRING
3.1. SYSTEM COMPOSITION
Central Station Web Central Station
Indoor Unit
H-LINK
CAUTION:
-Turn OFF the power supply of the room air-conditioner or the central controol device when
performing the wiring work.- DO NOT run all the H-LINK cable or power supply cable along the
other signal cable, or malfunction may occur due to the noise, etc. If it is required to run along
the other transmission cable, separate the cable more than 30cm, or run the cable through the
metal tube and earth the tube.
- Follow local codes and regulations when performing electrical wiring and earth wiring.
- Transmittion cable used in H-LINK shall be 2 cores cable (0.75mm2 to 1.25mm2) (Model:
VCTF, VCT, CVV, MVVS, CVVS, VVR, VVF) or 2 cores twist pair cable (Model: KPEV, KPEV-
Spec). Total length of cable shall be below 1000m.
- Do not use wire with more than 3 cores
ELECTRICAL WIRING
-
Up to 128 units can be connected in
case that H-LINK is made up only by
RAC adapter.
-
In case of combination use with H-LINK
devices like package air-conditioner, 16
refrigerant systems and up to 128
indoor units can be used.
-
RAC adapter and room air-conditioner
shall be connected one by one. Only
Outdoor Unit one RAC adapter cannot control various
room air-conditioners.
Indoor Unit
RAC RAC
adapter
adapter
Indoor
Indoor
Unit Unit
Outdoor Outdoor
Unit
Unit
3
Room Air-conditioner