Hitachi RAS-(3-6)HVNC1(E) - Page 129

4 Electrical wiring
115
SMGB0087 rev.0 - 12/2013
4
• Connection with one main line and with the branch lines for the units.
A
B
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Utopia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wir-
ing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
B
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.