Hitachi UTOPIA R32 Series Technical Catalogue

2 Features and benets
Installation benets
TCGB0136 rev.1 - 05/2021
26
2.5 Installation benets
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H-Link II bus
Easy connection
The communication bus is formed by a pair of small-diameter cores with no specic polarity. Given that no multi-way
communication cables are used, the installation is simple, fast and effective. The connections cannot be confused.
The two-core non-polarity communication bus provides signicant savings in terms of materials and installation, as the
same cable is used for all the units and is quickly and simply connected directly to them.
Long distance
The total length of the communication bus between all the units can reach 1000 m. If the communication line must be
longer (e.g. to expand the air conditioning system or to manage the units from a unied station in the building), the total
distance can be extended to 5000 m by using the accessories available.
Auto-conguration of system units
The air conditioning system control systems are auto-conguring. They recognise the type of unit they are connected to,
along with the type of indoor unit and its capacity. The installation is started quickly and efciently.
It is also possible to congure all units manually to adjust the installation in line with personalised parameters.
Up to 160 units connected together in a single H-LINK II bus line
It is possible to connect up to 160 indoor units and up to 64 refrigerant
cycles from the SYSTEM FREE range in a single H-LINK II bus line. To
expand the installation or increase the bus lines available, simply add
a new line.
All units are managed as one through the control systems installed.
Example of the H-LINK II system:
CSNET Manager 2
Specications
Transmission cable: 2 conductors
Transmission cable polarity: No polarity
Maximum number of outdoor units connected: 64 units per H-LINK II system
Maximum number of indoor units connected: 160 units per H-LINK II system
Maximum number of devices: 200
Maximum wiring length: Total 1000 m (5000 m (*))
Recommended cable:
Shielded twisted pair cable or shielded pair cable over 0.75 mm
2
(equivalent to KPEV-S)
Voltage: 5 V DC
? NOTE
• When the H-LINK II bus is used, the DIP switches must be adjusted. Otherwise, or if incorrectly adjusted, a transmission problem may
occur.
• TheH-LINKIIsystem offers greatexibilityfor the designofairconditioning systems, asinstallationissimple and thetotalcost
affordable. Furthermore, centralised management is possible by connecting the CSNET Manager 2 system to the H-LINK II network
cables.
• Additionally, it is possible to manage the installation over the internet using the CSNET Manager 2.
• (*) Using 4 H-LINK relays PSC-5HR (sold separately as an option).

Hitachi UTOPIA R32 Series Specifications

General

Brand	Hitachi
Model	UTOPIA R32 Series
Category	Air Conditioner
Language	English