Examples Of H-Link Ii System - Hitachi UTOPIA R32 Series Technical Catalogue

10 Electrical wiring
H-LINK II system

10.5.5 Examples of H-LINK II system

Two cases:
1. Using H-LINK II system for air conditioning systems without a central control device (Neither
Centralised remote controls nor Building air controls)
• Line connection with all units
A
B
• Line connection for each floor.
• Connection with one main line and with the branch lines for the 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,
SET FREE Mini).
• 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.
111 TCGB0136 rev.1 - 05/2021
A
B
A
B
A: Outdoor units.
C
B: Indoor units.
C: Do not install wiring in a loop.
A: Outdoor units.
B: Indoor units.
A: Outdoor units.
B: Indoor units.
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