Hitachi RAS-2-HVNP Service Manual page 119

4. Electrical wiring
• Connection with one main line and with the branch lines for the units.
A: Outdoor units.
B: Indoor units.
C A U T I O N
• The maximum number of units than can be connected is 64 outdoor units and 160 indoor units (including Uto-
pia and/or Set Free, Mini Set-free).
• Do not install the wiring in a loop.
• If the H-LINK II system is not used when carrying out the electrical wiring as shown above, it must be used
once the wiring of the instrument is completed. The DIP switches must therefore be set as specified in the DIP
switches on the PCB.
2. Using the H-LINK II system for air conditioning systems with a central control device (CSNET WEB or PSC-
A64S)
• If the central control device is used when carrying out electrical wiring, the CS-NET WEB can be connected at any point
of the H-LINK II wiring.
A: Outdoor units.
B: Indoor units.
• If the central control device is not used when electrical wiring is carried out, you must connect the H-LINK II wiring to all
the systems. The easiest method is usually to connect the outdoor units.
N O T E
For CSNET WEB 2.0 the limitations are those corresponding to H-LINK.
105
SMGB0079 rev.0 - 01/2013
A
A
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