Hitachi YUTAKI Series User Manual (English)

4 Control System71
System Configuration, Settings And Control System75
- Description75
- System Controller Overview75
- Contents of the Controller Pack76
- Quick-Start Installation Steps76
- Abbreviations & Terminology77
- Application Configurations77
- Principle of Bi-Valent or Mono-Energetic Operation78
- Mono-Valent Systems (CONF 1)79
- Mono-Energetic Systems (CONF 2)80
- Bi-Valent Systems - Parallel Operation (CONF3)81
- Bi-Valent System - Parallel Operation - Mixing Loop (CONF 4)82
- Bi-Valent System - Serial Operation (CONF 5)82
Supply Setpoint Calculation83
Heating Control Functions84
- Heating Circuit - General84
- Heating Characteristic Curve (OTC Control)84
  - Room Setpoint Parallel Shift85
  - Room Temperature Compensation86
- Heating Circuit Minimum/Maximum Temperature Limits86
- Heating Circuit (Secondary) Pump87
- Automatic No-Load Function87
DHW Control Functions87
- DHW Storage Tank Loading87
- DHW Control88
- Maximum DHW Loading Time89
- DHW Electric Heater90
  - Using the Boiler for DHW Loading91
- Using the Boiler for DHW Loading92
- Response of the Heat Pump to a DHW Demand92
- DHW Time Program92
Heatpump Control Functions93
- Heatpump Control93
- Heatpump Setting Control Signal94
- Heatpump Sensor Offset94
- Heatpump Maximum Return High Limit95
- Heatpump Operating Limits95
- Tariff Switch (Heat Pump Blocking) Input96
Boiler Control Functions97
- Boiler Control97
- Supply-Return Difference Check98
- Boiler Minimum on / off Times99
- Boiler Waiting Time99
- Maximum Outdoor Temperature for Boiler Operation99
Electric Heater Control Functions100
- Electric Heater Control100
- Supply-Return Difference Check101
- Electric Heater Waiting Time102
- Electric Heater Return High Limit Check102
- Maximum Outdoor Temperature for Electrical Heater Operation103
Mixing Valve Control Functions103
- Mixing Valve Control103
- Mixing / Bypass Valve Control104
- Mixed Heating Circuit Maximum Temperature Limit Protection104
- Mixing Valve Opening Delay104
General Functions105
- System Frost Protection105
- Automatic Summer Switch-Off105
- Pump and Valve Seizure Protection106
- Screed Function (Drying for New Floors)106
Parameter Tables107
- Installer Parameters107
- Engineering Parameters108
Conversion Table: Heat Pump Supply Temperature to Ma110
R Resistance Tables110
Technical Data111
- System Controller (XEK23232 A)111
- Water Temperature Sensor (XEK35524 A)111
- Outdoor Temperature Sensor (XEK35438 A)111
Mounting112
- Fitting or Removing the112
- Wall Mounting112
- Mounting on a DIN-Rail113
Mounting the Sensors113
- Water Temperature Sensor113
- Outside Temperature Sensor114
Electrical Wiring115
- Wiring Access Ports115
- Wiring Connections116
- System Component Connections117
System Configurations120
User Interface125
- Display125
- Controls125
Installation Configuration Settings126
- Reviewing and Setting the Installer Parameters126
- Installer Parameter List127
System Testing128
- System Start-Up128
- System Test128
- Reviewing the Operational Data129
- Manually Overriding the Outputs129
Expanding the System130
- Additional Mixing Zone130
- Binding RF Components Together131
System MMI Pack (Room Unit and RF Receiver)131
- Room Unit Installation Guide131
- Installing the Room Unit134
- Communication Loss135
- Installer Mode136
- Installer Parameters Table138
  - Category 1 - Room Unit Settings138
  - Category 2 - System Settings139
- Binding / Rebinding Procedure139
- Room Unit User Guide140
Device Control System145
Yutaki Unit PCB146
Safety and Control Device Setting147
- Defrost Operation Control149
- Control of Expansion Valve151

Available Optional Functions153

Troubleshooting167

Spare Parts of Yutaki/Spare Parts of Accessories231

Servicing239

Heating Capacity	5.0 kW - 16.0 kW
Cooling Capacity	5.0 kW - 16.0 kW
Energy Efficiency Class	A+++
Refrigerant	R32
Operating Temperature Range (Cooling)	46°C
Noise Level (Indoor Unit)	45 dB
Noise Level (Outdoor Unit)	45 dB

Hitachi YUTAKI Series Service Manual

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