8
8.2.3 Electrical wiring
8.2.3.1 System composition
Outdoor unit
Indoor unit
Indoor unit
RAC
adapter
RAC
adapter
Indoor unit Indoor unit
Outdoor
unit
Outdoor
unit
Room Air-
conditioner
• 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 de-
vices like package air-conditioner, 16 refrig-
erant systems and up to 128 indoor units can
be used.
• RAC adapter and room air-conditioner shall
be connected one by one. Only one RAC
adapter cannot control various room air-con-
ditioners.
CAUTION
• Turn OFF the power supply of the room air-conditioner or the central control 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.
• Transmission 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
8.2.3.2 Access to internal components
Open the cover by removing the
ï‚¡ and ï‚¢ screws
8 Control support devices
PSC-6RAD
TCGB0106 rev.0 - 12/2014
713
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