Hitachi YUTAKI Series - System Configuration, Settings And Control System; Description; System Controller Overview

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Systemconguration,settingsandcontrolsystem
SMGB0066 rev.0 - 12/2009
Controller pack
Service Manual
4

 
TheSystemControllerisacongurableoutdoor-temperature-compensatedheatingcontroller.
The System Controller is a part of the Heat Pump Controller Pack and is linked to the other components of the hydronic
controlsystem,suchasthewirelessRoomUnit,RFReceiver,WaterTemperatureSensorandOutsideSensor.
TheRoomUnitisconnectedtotheSystemControllerviaradiosignals,enablingsimplerinstallationandofferingtheend
user a choice to operate the system.
TheSystemControlleroperatestheheatpump,electricheaterorboiler,valvesandpumpstoensureoptimaloperationof
the heating system.
TheSystemControllerhasanLCDdisplaywithasimplemenustructureoperatedbyvebuttons,sothatitcaneasilybe
conguredtomanydifferentapplicationswithspecicinstallationsettings.

note
When performing any work with this product (installation, mounting, start-up), all instructions given by the -
manufacturer and in particular the safety instructions provided in the installation instructions must be followed.
The System Controller may only be installed and mounted by authorised and suitably trained personnel. -
If the unit is modied in any way, except by the manufacturer, all warranties concerning operation and safety are -
invalidated.
Make sure that local standards and regulations are respected at all times. -
Use only accessory equipment that comes from or has been approved by Honeywell or Hitachi. -

caution
Electrical hazard. Can cause serious injuries or death. -
Disconnect the mains power supply before the installation of the System Controller. Do not reconnect the -
power supply until all installation work is completed.
Before the controller is dismantled, disconnect the main power supply. -
 
TheSystemControllerisdesignedforcontrollingtheheatpumpinamono-valent,mono-energeticorbi-valentheating
system.Itprovidesefcientcontrolandreducesenergyusewhilemaintainingcomfortinthebuilding.
• Modulatingcontrolofheatpump.
• ControlofanAuxiliaryheatsource(electricheaterorboiler).
• Outsidetemperaturecompensated(OTC)control.
• Controlofheatingcircuitpumps/valvesand,optionally,domestichotwaterstorage.
• Systemfrostprotection.
ThefunctionalityoftheSystemControllerdependsontheinstalledcomponentsandtheselectedconguration.TheSystem
Controllerisdesignedinawaythatitcanbeconguredandupgradedtomeetmanyapplicationrequirements.