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iZONE 325 HITACHI AC UNIT MODULE






iZone C325H Hitachi & Emerald Air-Conditioner Interface Module

The iZone C325H is a communication interface designed to connect an iZone C225 control system with compatible Hitachi and selected Emerald ducted air conditioners. It enables integrated air-conditioning and zoning control through the iZone touchscreen, temperature sensors and mobile app when a Smart Hub is installed.

Key Features

  • Integrates compatible Hitachi and Emerald systems with the iZone C225 CPU

  • Controls system on/off, operating mode, set temperature and fan speed

  • Supports selected R410A and R32 ducted systems

  • Supports return-air, zone, master and RF temperature-sensor control

  • Suitable for compatible mid-static and high-static ducted units

  • App control available when connected to an iZone Smart Hub

  • Communication wiring is non-polarised

Hitachi Compatibility

System typeIndoor modelOutdoor model
R410A ductedRPI###1SQ seriesModel dependent
R410A ductedRPI###2SQ seriesModel dependent
R32 mid-staticPPIM-4.0UFA1NQPAS-4.0UFASNQ1
R32 mid-staticPPIM-5.0UFA1NQPAS-5.0UFASNQ1
R32 mid-staticPPIM-6.0UFA1NQPAS-6.0UFASNQ1
R32 high-staticPPIH-4.0UFA1NQPAS-4.0UFASMQ1
R32 high-staticPPIH-5.0UFA1NQPAS-5.0UFASMQ1
R32 high-staticPPIH-6.0UFA1NQPAS-6.0UFASMQ1
R32 high-staticPPIH-6.5UFA1NQPAS-6.5UFASMQ1

Emerald Compatibility

SystemIndoor modelOutdoor model
R32 high/medium-static ducted, 16 kWACR160DACR160U
R32 high/medium-static ducted, 20 kWACV200DACV200U

These Emerald systems use the same communication method and wiring arrangement as compatible Hitachi systems.

Connection Requirements

  • Connects to the indoor unit’s A/B communication terminals

  • Emerald connection: TB2 terminals A and B

  • Polarity is not critical

  • Requires shielded two-core twisted-pair control cable

  • Earth or shield must be terminated at the fan-coil end

  • Communication cable is supplied by the installer

Important Installation Information

Do not apply external voltage to the A/B communication cable. The C325H is a communications interface and must only be connected to the specified low-voltage control terminals.

Always confirm the complete indoor and outdoor model numbers before ordering.

Sources: iZone Hitachi compatibility and iZone Emerald compatibility


Internal Reference: IZ-C325H