Hitachi RAS-3-HVNC - Page 119

4. Electrical wiring
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SMGB0079 rev.0 - 01/2013
4
• Connection with one main line and with the branch lines for the units.
A

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specied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

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.