Viessmann SCU224 Wartungshandbuch

SCU224Manual en-US/CASCU224MountingConnectionApplication examplesOperationTroubleshootingThank you for buying this product.Read this manual carefully

© Viessmann 5443203| 10SCU224∆T control for the heat exchange between 2 tanksDT3O:Switch-on temperature diff. Adjustment range: 2.0 ... 40.0°Ra [1.0

© Viessmann 544320311 |SCU224Maximum temperature limitationMX3O / MX3F:Maximum temperature limitation Adjustment range: 30.0 ... 200.0 °F [0.0 ... 95.

© Viessmann 5443203| 12SCU224R2S1S2R1S3S4 / TRSystem layout 3The controller calculates the temperature difference bet-ween collector sensor S1 and tan

© Viessmann 544320313 |SCU224Adjustment ChannelsChannel Description Factory setting PageArr x System 3 39DT O x Switch-on temperature difference 12.0

© Viessmann 5443203| 14SCU224The thermostat function works independently from the solar operation and can be used for using surplus energy or for back

© Viessmann 544320315 |SCU224When a starting time for thermal disinfection with starting delay is adjusted in SDIS, the thermal disinfection will be d

© Viessmann 5443203| 16SCU224System layout 4S2R1S3R2S1The controller calculates the temperature differences between collector sensor S1 and tank sen

© Viessmann 544320317 |SCU224Adjustment ChannelsChannel Description Factory setting PageArr x System 4 39nMN x Minimum pump speed 30 %39DT1O x Switch-

© Viessmann 5443203| 18SCU224System layout 5The controller calculates the temperature differences between collector sensor S1 and tank sensors S2 an

© Viessmann 544320319 |SCU224Legend:Symbol Specificationx Channel is availablex* Channel is available if the corresponding option is activated.Adjustme

© Viessmann 5443203| 2SCU224Safety advice:Please read the following information carefully before installing and operating the controller. In this way

© Viessmann 5443203| 20SCU224S1S2S3R1 R2System layout 6The controller calculates the temperature differences between collector sensor S1 and tank se

© Viessmann 544320321 |SCU224Legend:Symbol Specificationx Channel is availablex* Channel is available if the corresponding option is activated.Adjustme

© Viessmann 5443203| 22SCU224System layout 7The controller calculates the temperature differences between the collector sensors S1 and S3 and the ta

© Viessmann 544320323 |SCU224Legend:Symbol Specificationx Channel is availablex* Channel is available if the corresponding option is activated.Adjustme

© Viessmann 5443203| 24SCU224S1S4S2S3R1R2System layout 8The controller calculates the temperature difference bet-ween collector sensor S1 and tank sen

© Viessmann 544320325 |SCU224Legend:Symbol Specificationx Channel is availablex* Channel is available if the corresponding option is activated.s Channe

© Viessmann 5443203| 26SCU224∆T control for backup heating by solid fuel boilerDT3O:Switch-on temperature diff. Adjustment range: 2.0 ... 40.0°Ra [1.

© Viessmann 544320327 |SCU224Maximum temperature limitationMX3O / MX3F:Maximum temperature limitation Adjustment range: 30.0 ... 200.0 °F [0.0 ... 95.

© Viessmann 5443203| 28SCU224S1S3S2S4R2R1System layout 9The controller calculates the temperature difference bet-ween collector sensor S1 and tank sen

© Viessmann 544320329 |SCU224Legend:Symbol Specificationx Channel is availablex* Channel is available if the corresponding option is activated.s Channe

© Viessmann 54432033 |SCU224!• System-monitoring-display• Up to 4 Pt1000 temperature sensors• 2 semiconductor relays for pump speed control• 10

© Viessmann 5443203| 30SCU224System layout 10Arr 10VBus109The controller calculates the temperature difference bet-ween collector sensor S1 and tank s

© Viessmann 544320331 |SCU224Legend:Symbol Specificationx Channel is availablex* Channel is available if the corresponding option is activated.s Channe

© Viessmann 5443203| 32SCU224The system monitoring display consists of three blocks: channel display, tool bar and system screen (active

© Viessmann 544320333 |SCU224The system screen (active system layout) shows the system selected on the controller. It consists of several system compo

© Viessmann 5443203| 34SCU2243. Commissioning Î Establish the power supply During a short initialization phase, the operating control lamp flashes red

© Viessmann 544320335 |SCU224Overview of system layouts:Arr 1 : standard solar system layoutArr 2 : solar system layout with heat exchangeArr 1 Arr

© Viessmann 5443203| 36SCU224Now the controller is ready for operation with typical settings to suit the selected system layout. The settings made in

© Viessmann 544320337 |SCU224Indication of collector temperaturesIndicates the current collector temperature.• COL : collector temperature (1-colle

© Viessmann 5443203| 38SCU224TimeIndicates the actual time. Press the button for two seconds in order to adjust the hours. Press it again in order

© Viessmann 544320339 |SCU224∆T-regulationDT O / DT1O / DT2O / DT3O:Switch-on temperature diff. Adjustment range: 2.0 ... 40.0°Ra [1.0 ... 20.0 K]in

© Viessmann 5443203| 4SCU224displaypush buttonfuse 4Acable conduits with strain reliefcover1.1 MountingThe unit must only be installed • in a dry inte

© Viessmann 5443203| 40SCU224Maximum tank temperature Once the adjusted maximum temperature is exceeded, the solar pump is switched off and furt

© Viessmann 544320341 |SCU224CMX / CMX1 / CMX2: Maximum collector temp. Adjustment range:150 ... 320 °F[70 ... 160 °C]in steps of 1 °Ra [1 K] Factor

© Viessmann 5443203| 42SCU224CMN / CMN1 / CMN2:Collector minimum temp. Adjustment range: 50 ... 190 °F[10 ... 90 °C]in steps of 1 °Ra [0.5 K]Factory s

© Viessmann 544320343 |SCU224The SCU224 priority logicPRIO: Loading priority Adjustment range: SE 1, SE 2, Su 1, Su 2, 0, 1, 2 Factory setting: Arr 4

© Viessmann 5443203| 44SCU224Evacuated tube collector functionO TC:Evacuated tube collector function Adjustment range: OFF / ON Factory setting: OFFNo

© Viessmann 544320345 |SCU224Time period - switch-on conditionstDTO: Time period - switch-on conditions Adjustment range: 1 ... 100 sin steps of 1 s

© Viessmann 5443203| 46SCU224For control and service work, the operating mode of the controller can be manually adjusted. For this purpose, select the

© Viessmann 544320347 |SCU2245. TroubleshootingOperating control lampWarning symbolsOperating control lamp flashes red. On the display the symbols a

© Viessmann 5443203| 48SCU2245.1 Various:Pump starts for a short moment, switches off, switches on again, etc. Temperature difference at the controlle

© Viessmann 544320349 |SCU224Tanks cool down at nightCollector circuit pump runs during the night?no yesCheck controller:Manual operation active?Tube

© Viessmann 54432035 |SCU2241.3 Data communication/ BusThe controller is equipped with a VBus® for data transfer with and energy supply to external mo

© Viessmann 5443203| 50SCU2246. AccessoriesSmart Display SD3The Smart Display is designed for simple connection to controllers with VBus®. It is used

© Viessmann 544320351 |SCU224Notes

© Viessmann 5443203| 52SCU224Please note:The design and the specifications can be changed without prior notice.The illustrations may differ from the or

© Viessmann 5443203| 6SCU224S1S2S4 / TRSystem layout 1The controller calculates the temperature difference bet-ween collector sensor S1 and tank senso

© Viessmann 54432037 |SCU224Legend:Symbol Specificationx Channel is availablex* Channel is available if the corresponding option is activated.s* System

© Viessmann 5443203| 8SCU224S1S3S4R1R2S2System layout 2The controller calculates the temperature difference bet-ween collector sensor S1 and tank sens

© Viessmann 54432039 |SCU224Legend:Adjustment ChannelsChannel Description Factory setting PageArr x System 2 39DT O x Switch-on temperature difference