Hitachi RAS-5FSNY2E [134/148] H link ii system

Hitachi RAS-5FSNY2E [134/148] H link ii system
10 Electrical wiring
126
TCGB0068 rev.1 - 08/2012
10.4 H-LINK II system
The H-LINK II is the wiring connection system between units.
The H-LINK II wiring system only needs:
Two transmission wires connecting each indoor and outdoor unit for a total of 64 refrigerant cycles.
Connection wiring for all indoor and outdoor units in series.
10.4.1 Application
The H-LINK II system can be applied to the following models:
Indoor Unit
Outdoor Unit
System Free
RCI
RAS-(4-6)FS(V)N(Y)2E
RCIM
RCD
RPI
RPIM
RPK
RPF
RPFI
RPC
C A U T I O N
The H-LINK II system cannot be applied to the models with the old cycle, nor to units with an old transmission.
10.4.2 Features
The total wiring length is considerably reduced compared to traditional connections.
Only one connection is required for the wiring between the indoor and outdoor units.
The wiring connection of the complementary central control devices is easy.
N O T E
CSNET WEB is centralized control system which allows the installation to be controlled remotely. It can be con-
nected at any point of the local corporate network, or even via the Internet.
10.4.3 Specications
Transmission cable: 2-wire.
Polarity of transmission cable: non-polar wire.
Maximum number of indoor units that can be connected: 4
units per cycle and 160 units per H-LINK II system.
Maximum wiring length: total 1000 m (including CSNET WEB).
It is possible to increase the maximum wiring length up to
5000 m by using up to four PSC-5HR units.
Recommended cable: shielded twisted pair cable, over
0.75 mm
2
(Equivalent to KPEV-S).
Voltage: 5 V DC.
A refrigerant cycle
Transmission cables
Refrigerant piping
Outdoor unit
Indoor units
C A U T I O N
For the H-LINK II system must use twisted shielded pair cable or shielded pair cable.

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