Application; H-Link Ii Features; Example Of An H-Link Ii System - Hitachi RAS-(3-6)HVRNM2E Service Manual

4 Electrical Wiring
The following settings are not available:
N O T E
• It is not possible to connect diferent indoor units from diferent systems with the same remote control, once the
remote control function wiring has been selected not to be used.
• All optional units connected to CN3 can only be used with master unit with remote control connected to it.

Application

The H-LINK II wiring system requires only two transmission cables that connect each indoor unit and the outdoor unit for
up to 64 refrigerant cycles. This wiring system also requires the connect wires for all the indoor units and all the outdoor
units in series. You can apply this H-LINK II system to following models:
Indoor Unit
RCI(M)
RPI(M)

H-LINK II features

• It is possible to control up to 160 indoor units (64 groups of indoor units) with only one control panel (using the PSC-64S
controller). It is possible to control up to 200 units (indoor unit, outdoor unit and central control).
• The total wiring length is remarkably reduced.
• Only one (1) connection is required for the wiring between the indoor unit and the outdoor unit.
• Easy wiring connection to the central control panels.

Example of an H-LINK II system:

Outdoor unit
Indoor units
A refrigerant cycle
Transmission cables
Refrigerant piping
102
SMGB0064 rev.0 - 08/2011
RDC
RPK
RPF
RPFI
RPC
Outdoor Unit
RAS-(3-12)H(V)RNM2(E)
RAS-(2-10)H(V)RN(S)(2)(E)