Daikin ERLQ004CA Installer's Reference Manual

Contents

8 ConfigurationInstaller reference guide66ERLQ004~008CA + EHBH/X04+08CBDaikin Altherma – Low temperature split4P384972-1B – 2017.04CAUTIONThe booster heater permission schedule is used to restrictor allow booster heater operation based on a weeklyprogram. Advice: In order to avoid unsuccessfuldisinfection function, at least allow the booster heater (bythe weekly program) for minimum 4 hours starting from thescheduled start-up of disinfection. If the booster heater isrestricted during disinfection, this function will NOT besuccessful and the applicable warning AH will begenerated.INFORMATIONIn case of error code AH and no interruption of thedisinfection function occurred due to domestic hot watertapping, following actions are recommended:▪ When the Domestic hot water > Type > Reheat orReheat + sched. is selected, it is recommended toprogram the start-up of the disinfection function at least4 hours later than the last expected large hot watertapping. This start-up can be set by installer settings(disinfection function).▪ When the Domestic hot water > Type > Scheduled onlyis selected, it is recommended to program a Storageeco 3 hours before the scheduled start-up of thedisinfection function to preheat the tank.INFORMATIONDisinfection function is restarted in case the domestic hotwater temperature drops 5°C below the disinfection targettemperature within the duration time.INFORMATIONAn AH error occurs if you do the following duringdisinfection:▪ Set the user permission level to Installer.▪ Go to the DHW tank temperature home page (Tank).▪ Press to interrupt the disinfection.8.3.3 Heat source settingsBackup heaterFor systems without domestic hot water tank or with separatedomestic hot water tank (only for EHBH/X)Backup heater operation mode: defines when backup heateroperation is enabled or disabled. This setting is only overruled whenbackup heating is required during defrost operation or malfunctioningof the outdoor unit (when [A.6.C] is enabled).For systems with an integrated domestic hot water tank (onlyfor EHVH/X)Backup heater operation mode: defines when backup heateroperation is disabled or only allowed during domestic hot wateroperation. This setting is only overruled when backup heating isrequired during defrost operation or malfunctioning of the outdoorunit (when [A.6.C] is enabled).# Code Description[A.5.1.1] [4‑00] Backup heater operation:▪ 0: Disabled▪ 1 (default): Enabled# Code Description[A.5.1.3] [4‑07] Defines whether backup heater secondstep is:▪ 1: Allowed▪ 0: NOT allowedIn this way it is possible to limit thebackup heater capacity.N/A [5-00] Is backup heater operation allowedabove equilibrium temperature duringspace heating operation?▪ 1: NOT allowed▪ 0: Allowed[A.5.1.4] [5‑01] Equilibrium temperature.Outdoor temperature below whichoperation of the backup heater isallowed.Range: –15°C~35°C (default: 0°C) (step:1°C)INFORMATIONOnly for systems with integrated domestic hot water tank: Ifbackup heater operation during space heating needs to belimited but can be allowed for domestic hot wateroperation, then set [4‑00] to 2.INFORMATIONOnly for systems with integrated domestic hot water tank: Ifthe storage temperature set point is higher than 50°C,Daikin recommends NOT to disable the backup heatersecond step because it will have a big impact on therequired time for the unit to heat up the domestic hot watertank.Auto emergencyWhen the heat pump fails to operate, the backup heater and boosterheater can serve as an emergency heater and either automaticallyor non-automatically take over the heat load.▪ When auto emergency is set to Automatic and a heat pump failureoccurs:▪ The backup heater will automatically take over the heat load.▪ The booster heater will automatically take over the domestic hotwater production.▪ When auto emergency is set to Manual and a heat pump failureoccurs, the domestic hot water and space heating operations willstop and need to be recovered manually. The user interface willthen ask you to confirm whether the backup heater or boosterheater can take over the heat load or not.When the heat pump fails, will appear on the user interface. If thehouse is unattended for longer periods, we recommend to set[A.6.C] Emergency to Automatic.# Code Description[A.6.C] N/A Emergency:▪ 0: Manual (default)▪ 1: AutomaticINFORMATIONIf [4‑03]=1 or 3, then Emergency=Manual is not applicablefor the booster heater.INFORMATIONThe auto emergency setting can be set in the menustructure of the user interface only.