System Control - Main Concept; Utopia Prime - Hitachi UTOPIA R32 Series Technical Catalogue

10 Electrical wiring

System Control - Main concept

10.6 System Control - Main concept

10.6.1 UTOPIA Prime

When the UTOPIA Prime system is in Thermo-ON, the system will switch to Thermo-OFF as soon as there is an indoor
unit that has no demand. The system will return to Thermo-ON when all units are in demand.
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Simultaneous operation (only available with UTOPIA Prime)
In the simultaneous operation mode, all indoor units are sharing both operation parameters (Tset, operation mode, fan
speed, etc.) and also Thermo-ON/OFF status. All units operate simultaneously as if they were a single indoor unit. All
indoor units will go to Thermo-ON status if all of them have load demand, all units will go to Thermo-OFF one of the units
has no load demand (has reached Tset).
This unit can be operated simultaneously with 2, 3 and 4 indoor units combinations.
Only one remote control switch (PC-ARFP1E or later models) can be installed.
The remote control switch can control without transmission wiring up to 4 units (FSN4 series or higher) simultaneously.
All optional functions set in the remote controller switch are apply with the same setting to all indoor units.
Outdoor
unit
In case indoor units need to have different optional function settings, but with the same setting temperature, then it will
have to be wired the operating cable for remote control (transmission wiring).
Outdoor
unit
Remote control switch (PC-ARFP1E or later models)
113 TCGB0136 rev.1 - 05/2021
Tset1 Tset1
Tset1
Remote control switch (PC-ARFP1E or later models)
Tset1 Tset1
Tset1
Control wiring
(H-LINK II)
Tset1 Tset1
Control wiring
(H-LINK II)
Tset1 Tset1
Operating cable for remote control
Transition wiring
The transition wiring is required
when operate multiple indoor units
by 1 remote control switch and
different optional functions are
required.
Indoor unit
Indoor unit
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