CR24, single room controller - Belimo

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FunctionsBCChange-over ao1 Digital input di2 CR24-B1 onlyAC 24 V+~ao1 U5 11 2 6 71 2 3 5Y U5+~CoolingHeatingFixed heating modeChange-over4di2CR24-B1Belimo actuatorIn change-over applications, the digital input di2 controls the VAV systemoutput ao1 of the CR24-B1 controller.Typical applicationsChange-over heating or heating/cooling.NoteThe CR24-B3 controller is suitable for applications that require both astand-by function and a change-over function.ConfigurationThe change-over function is configured using DIPswitch 21 2Y [V]10HeatingChange-overCooling20W At R [°C]KeyY Output signalt R Room temperatureW A Current setpointChange-over ao2 Digital input di3 CR24-B3 onlyAC 24 V10+1 2 11 70~1 2 3 5Y U5+~Y [V]Heatingao2 U5 1 di312Change-overW ACoolingt R [°C]Change-overCoolingHeatingKeyCR24-B3Belimo actuatorY Output signalt R Room temperatureW A Current setpointIn change-over applications, the digital input di3 controls the commonheating/cooling output ao2 of the CR24-B3 controller.Typical applicationsChange-over heating or heating/cooling.Note– For chilled ceiling applications, refer to page 12.– The CR24-B1 controller is suitable for applications that only require achange-over function.ConfigurationThe change-over function is configured using DIPswitches 3 and 4.1 2 3 4 5 6ENG-93001-93427-08.04-2M • Printed in Switzerland • ZSD • Subject to technical modifications14
BCFunctionsBoost – max Digital input di3 CR24-B3 onlyAC 24 V+~AutoBoostThe CR24-B3 controller allows override control at the digital input di3,to enable the room to be ventilated with the maximum air flow (max).This function acts on all three analog outputs (see "Notes"). Room temperaturecontrol is deactivated in this mode (exception: frost protectionfunction).10201 2Y [V]ao3ao2W Aao1Boost – maxt R [°C]Boost12di3CR24-B3LegendeY Output signalt R Room temperatureW A Current setpointTypical applications– Purging conference rooms, hotel rooms etc.– Assisting smoke extraction– Free- or night coolingNotesThe boost function acts on the outputs as follows:– ao1 (VAV) 100% > 10 V ( max )– ao2 (heating / cooling) 0% > 0 V– ao3 (heating) 0% > closed (3-point)The boost function is deactivated by the following events:– Boost signal (di3) not active– Frost limit temperature (10°C) undershotConfigurationThis boost function is configured usingDIP switches 4 (boost on) and 5 (boost max ).1 2 3 4 5 6Boost – Temperature-controlled Digital input di3 CR24-B3 onlyAC 24 V+~AutoBoostThe CR24-B3 controller allows override control at the digital input di3,to enable the room to be heated or cooled with the maximum capacity.This function acts on all three analog outputs (see "Notes").Typical applicationsBoost– Rapid heating, rapid cooling– Cooling, morning boost etc.ENG-93001-93427-08.04-2M • Printed in Switzerland • ZSD • Subject to technical modifications1 2Y [V]1020ao3ao2W Aao112di3Boost – Temperature-controlledCR24-B3LegendeY Output signalt R [°C]t R Room temperatureW A Current setpointNotesThe boost function acts temperature-sensitive on the outputs as follows:– ao1 (VAV) 100% > 10 V ( max )– ao2 (heating / cooling) 100% > 10 V– ao3 (heating) 100% > open (3-point)To support reheater applications the VAV system output (ao1) gets activatedat the heating condition too.The boost function is deactivated by the following events:– Boost signal (di3) not active– Comfort setpoint (W A ) reachedThe air is always conditioned to the comfort setpoint W, even if stand-byis active, in order to facilitate room preconditioning.ConfigurationThis boost function is configured using DIP switches4 (boost on) and 5 (boost temperature-controlled).12 3 4 5 615
Page 1 and 2: BC4. CR-1Product informationCR24-..
Page 3 and 4: BCOverview of functionsENG-93001-93
Page 5 and 6: BCCR24-B1 Single room controllersWi
Page 11 and 12: BCFunctionsIntroductionThe control
Page 13: BCFunctionsExternal temperature sen
Page 17 and 18: BCInstallation / DimensionsMechanic
Page 19 and 20: BCNotesENG-93001-93427-08.04-2M •

CR24, single room controller - Belimo

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