SCU224 49006430 *49006430* SCU224 Mounting Connection Handling Fault indication Examples manual Thanks for buying this product. Read this manual carefully to get the best perfomance from this unit.
SCU224 Contents Imprint Safety regulations.................................................................2 Technical data and overview of functions .........................3 1. Installation..............................................................4 1.1 Mounting................................................................................... 4 1.2 Electrical Connection............................................................ 4 1.2.1 Data communication / Bus........................................
SCU224 • System-monitoring-display • Up to 4 temperature sensors Pt1000 • 9 basic systems selectable • Heat balancing • VBus® • Function control • Thermostat function (time controlled) • Parameterisation and control of the system by Service Center; Software is possible • User-friendly operation by simple handling ! • Housing in outstanding design and compact dimensions, easy to install Scope of delivery: 1 x SCU224 1 x accessory bag 1 x spare fuse T4A 2 x screws and dowels 4 x strain relief and sc
SCU224 1. Installation Warning! Switch-off power supply before opening the housing. 1.1 Mounting display pushbutton cover cable conduits with strain relief can fuse 4A fastening The unit must only be located internally. It is not suitable for installation in hazardous locations and should not be sited near to any electromagnetic field.The controller must additionally be equipped with an all-polar gap of at least 3 mm or with a gap according to the valid installaton regulations, e.g.
SCU224 1.2.1 Data communication/ Bus DE - 45527 Hattingen DeltaSol BS Plus CU 72060171 01 UL 60730-1A:2002 CSA E60730.1:2002 Temp. Sensor Pt1000 S1 1 2 3 S2 4 S3 5 6 S4 7 8 VBus 9 10 12 13 14 T4A 115 V~ R1 2 (1) A 115 V~ R2 2 (1) A 115 V~ The controller comes with a VBus® for data communication and energy supply of external modules. The modules are connected independently of the polarity to the connections marked with „VBus®“.
SCU224 1.2.3 Wiring connections for system 2 Solar system and heat exchange with an existing tank with 1 tank, 4 sensors and 2 pumps. Arr 2 S1 R1 S3 Tank 1 Tank 2 S4 S2 R2 1.2.4 Wiring connections for system 3 Symbol S1 S2 S3 S4 R1 R2 Specification Collector sensor Tank sensor lower Tank sensor at the top Tank Sensor 2 Solar pump Pump for heat exchange Solar system and after-heating with 1 tank, 3 sensors and after-heating. Sensor S4 / TRF can optionally be used for heat quantity balancing.
SCU224 Solar system and tank charge in layers with 1 tank, 3 sensors, 1 solar pump and 3-way-valve for tank charge in layers. Sensor S4 / TRF can optionally be used for heat quantity balancing. 1.2.5 Wiring connections for system 4 Arr 4 S1 R1 Symbol S1 S2 S3 S4 / TRF S3 R2 S2 S4 / TRF R1 R2 1.2.
SCU224 2-tank-solar system with pump logic with 2 tanks, 3 sensors and 2 solar pumps. 1.2.6 Wiring connections for system 6 Arr 6 S1 S4 Tank 1 R1 Tank 2 S2 R2 S3 Symbol S1 S2 S3 S4 R1 R2 1.2.7Wiring connections for system 7 Specification Collector sensor Tank sensor 1 Tank sensor 2 Measuring sensor (optional) Solar pump 1 Solar pump 2 Solar system with east-west collectors, 1 tank, 3 sensors and 2 solar pumps.
SCU224 Solar system with after-heating by solid fuel boiler with 1 tank, 4 sensors, 1 solar pump and 1 pump for afterheating. 1.2.8 Wiring connections for system 8 Arr 8 S1 S4 S3 R1 S2 1.2.
SCU224 2. Operation and function 2.1 Pushbuttons for adjustment backward forward – OK + The controller is operated by 3 pushbuttons below the display. The forward-key (+) is used for scrolling forward through the indication menu or to increase the adjustment values. The backwards-key (–) is accordingly used for the reverse function. For adjustment of last indication channel, keep button + pressed for 2 seconds. If an adjustment value is shown on the display, SEt is indicated.
SCU224 2.2.3 System screen The system screen (active system scheme) shows the schemes selected on the controller. It consists of several system component symbols, which are - depending on the current status of the system - either flashing, permanently shown or hidden.
SCU224 3. Primary commissioning For primary commissioning the system configuration has to be adjusted first operating control lamp forward backward – OK + 1. AC power supply must be activated at first.The controller passes an initialisation phase during which the operating control lamp is blinking red and green. After having finished the initialisation, the controller is in automatic operation with factory settings. The factory default system configuration is Arr 1. 2.
SCU224 4. Control parameter and indication channels 4.1 Channel-overview Corresponding channel is only available if the option heat quantity measurement is activated (OHQM). Legend: x Corresponding channel is only available if the option heat quantity measurement is deactivated (OHQM). Corresponding channel is available. x* MEDT Corresponding channel is available if the appropriate option is activated.
SCU224 Channel OCX OCX1 CMX CMX1 OKN OKN1 CMN CMN1 OCF OCF1 CFR CFR1 EM2 OCX2 KMX2 OCN2 CMN2 OCF2 CFR2 PRIO tST tRUN OREC O TC DT3O DT3F MX3O MX3F MN3O MN3F AH O AH F OHQM FMAX MEDT MED% t1 on t1 off t2 on t2 off t3 on t3 off HND1 HND2 LANG UNIT PROG 2 x 3 x 4 x Arr 5 x 6 x 7 8 x 9 x x* x* x x x* x* x x x* x* x x* x* x* x* x* x* x* x x x x x x x x* x* x* x* x* x* x* x x x x x x x x* x* x* x* x* x* x* x x x* x x* x x* x x x x x x x x x x x MEDT x x x x
SCU224 4.1.1 Indication of collector temperatures COL, COL1, COL2: Collector temperature display range: -40 ...+480°F 4.1.2 • • • • • TST : TSTL : TSTU : TST1 : TST2 : tank temperature (1-tank-system) tank temperature lower tank temperature above temperature tank 1 temperature tank 2 Shows the current temperature of the corresponding additional sensor (without control function).
SCU224 4.1.6 Operating hours counter h P / h P1 / h P2: operating hours counter Indication channel The operating hours counter adds up the solar operating hours of the respective relay (h P / h P1 / hP2). Full hours are shown on the display. The operating hours added up can be reset. As soon as in one operating hours channel is selected, the symbol permanently shown on the display. The button SET (OK) must pressed for approx. 2 seconds in order to get back into the RESET-mode of the counter.
SCU224 4.1.8 ∆T-regulation DT O: Switch-on temperature difference Adjustment range 2,0 ... 40,0 °Ra Factory setting 12.0 Primarily the controller looks at the temperature difference between the collector temperature sensor and the tank temperature sensor. If the switch-on temperature difference (DT O / DT1O / DT2O) is reached, the pump is activated. If the adjusted switch-off temperature is underrun (DTF / DT1F / DT2F), the controller switches-off.
SCU224 4.1.11 Collector temperature limitation Emergency shut down of the collector EM / EM1 / EM2: temperature limitation corector Adjustment range 230 ...400°F Factory setting 285°F 4.1.12 System cooling OCX / OCX1 / OCX2: Option System cooling Adjustment range OFF ...ON Factory setting ON CMX / CMX1 / CMX2: collectormaximum temperature Adjustment range 210 ...
SCU224 4.1.15 Oscillating charge Respective adjustment values: Factory setting Adjustment range priority [PRIO] (1 / Arr 5,6) (2 / Arr 4) 0-2 oscillating break-time [tST] oscillating charge-time [tRUN] 2 min. 15 min. 1-30 min. 1-30 min. The SCU224 priority logic The above-mentioned options and parameters only have a meaning in multi-tank systems (system Arr = 4, 5, 6).
SCU224 4.1.18Thermostat function (Arr = 3) Afterheating use of surplus energy The thermostat function works independently from the solar pump operation and can be used for after-heating by a boiler, use of surplus energy, or for rejecting excess heat. • AH O < AH F the thermostat function is used for after-heating • AH O > AH F the thermostat function is used for use of surplus energy or heat rejection. The display shows the symbol output is activated.
SCU224 5.Tips for fault indication If a malfunction occurs, it will be indicated on the display of the controller: can fuse 4A T4A DE - 45527 Hattingen DeltaSol BS Plus 115 V~ CU 72060171 01 UL 60730-1A:2002 CSA E60730.1:2002 Temp. Sensor Pt1000 S1 1 2 3 S2 4 S3 5 6 S4 7 8 VBus 9 10 R1 2 (1) A 115 V~ R2 2 (1) A 115 V~ 12 13 14 Warning symbol N R2 N R1 N L 15 16 17 18 19 20 Operating control lamp Operating control lamp flashes red. On the display the and appear.
SCU224 5.1Various: Pump is overheated, but no heat is being transferred from collector to the tank, feed flow and return flow are equally warm, possibly also bubble in the tubes Pump starts for a short moment, switches-on/off repeatedly Air in the system? Is the temperature difference at the controller too small? no yes Exhaust the system; increase system pressure to the minimum pressures listed in the Vitosol Startup and service manual.
SCU224 a b Tanks are cooled during the night. Control the check valve in warm water circulation- o.k. Does collector circuit pump run during the night? no yes Collector temperature is at night higher than ambient temperature. no yes yes Check the controller functions Check the supply and return line flow check valves to ensure functionality. Is the tank insulation sufficient? yes no Intensify the insulation.
SCU224 6. Accessory Smart Display SD3 Serves as a visualization of collector and DHW tank temperature, as well as energy transfer (kWh) within the solar system. Datalogger DL2 Come complete with ServiceCenter Software (full version). Compact wall mounted devise to capture system operational details enabling further anaylsis using ServiceCenter software, or using spreadsheet software. Comes with 180 MB flash memory and ethernet cable connection.
