SOM 7 SI Solar Controller Installation Manual
Contents
1. fastening 3 Hang up the housing at the upper fastening point and mark the lower fastening point on the wall The distance between the 2 mounting holes is 130 mm 4 Fasten the housing at its lower point 104 fixing The power supply to the controller must only be made by 1 2 Electrical connection an external power supply switch and the line voltage must be 120 VAC 50 60 Hz Flexible lines are to be fixed at the housing by enclosed strain relief supports and screws The controller is equipped with 2 standard relays to which the consumers pumps valves etc can be connected CU 72060171 01 UL 60730 1A 2002 vA 1 CSA E60730 1 2002 18 conductor R1 17 neutral conductor N 13 ground clamp m Relay 2 ensor Clamp ground clamp consumer en n 16 conductor 2 15 neutral conductor N 14 ground clamp The temperature sensors S1 up to S4 will be Dangerous voltage on contact connected to the following terminals independently of the polarity Electrostatic discharge can lead to damages of elec 1 2 Sensor 1 e g Sensor collector 1 5 6 Sensor 3 e g Sensor collector 2 7 8 Sensor 4 e g Sensor tank 2 The power supply is effected to the clamps 19 Neutral Conductor N 20 Line Conductor L 12 Ground Clamp pushbutton must installed in accordance with all electrical regulati2. SOM 7 SI SIIEBELELTRON 3 Primary commissioning For primary commissioning the system scheme has to be selected first 1 After AC power is supplied to the unit it goes through its power up tests during which the control lamp is blinking red and green After this the unit is ready for configuration The unit s default system scheme is Arr 1 operating control lamp backward forward 2 Clock time adjustment in channel TIME By pressing the button once you can adjust hours pressing it once again the minutes The time can be adjusted by buttons 1 and 2 and saved by pressing the button 3 select adjustment channel Arr change into EI3ui mode see 2 1 adjustment are saved by pressing button Now the controller is ready for operation and should enable SET an optimum operation of the solar system with the factory selection adjustment mode settings Arr 1 Arr 2 System survey Arr 1 Standard Solar System Arr 2 Solar System with Heat Exchange Arr 3 Solar System with After Heating Arr 4 Solar System with Tank Charge in Layers Arr 3 Arr 4 Arr 5 2 Tank Solar System with Valve Logic Arr 6 2 Tank Solar System with Pump Logic Arr 7 Solar System with 2 Collectors and 1 Tank Arr 8 ae System with After Heating by Solid Hot Fuel oiler DEOS Arr 9 Solar System with Heating Circuit Reverse Raising Arr 7 Arr 8 Arr 9 08042 som 7 si monen indd 12 08042 som_7_si monen indd SOM 7 SI STIEBE
3. Please note As there is only a limited heat quantity of the tank available for this function the antifreeze function should only be used in regions with few days of temperatures around freezing point 08042 som 7 si monen indd 08042 som_7_si monen indd SOM 7 SI 4 1 15 Oscillating Charge Respective Adjustment Values Priority PRIO Oscillating Break Time tST Oscillating Charge Time tRUN SOM 7 SI Priority Logic Tank Priority ire THER Oscillating Break Time Oscillating Charge Time Collector Rising Temperature ERUN c 2 4 1 16 Recooling function OREC Recooling Option adjustment range Lk AER OFF ON NFF 14 Factory setting OFF 4 1 17 Tube collector special function OTC Tube Collector Function Adjustment range ice OFF ON r Factory setting OFF owe Factory setting Adjustment range 1 Arr 5 6 2 4 0 2 2 min 1 30 min 15 min 1 30 min The above oscillating charge parameters are only available in multi tank or layered charge systems Arr 4 5 and 6 If Tank Priority is set to 0 the tanks which show a temperature difference towards the collector are loaded in numerical order tank 1 or tank 2 Usually only one tank is loaded at this point For Arr 5 6 parallel loading is also possible The controller checks the tanks regarding loading facilities switch on difference If the priority tank cannot be lo
4. in IINIT T LUV ga CL The thermostat function is independent from the solar loop s differential switching temperatures and can be used either to control a backup heating source such as a boiler or to send some of the tank s excess thermal energy to a heating loop or heat dump Whis it does is dependent upon the settings AH O and AH F if AH O lt AHF The thermostat function is used to add heat to the tank using a back up heating source if AH O gt AHF The thermostat function is used to remove the tank s excess thermal energy Symbol will be shown on the display if the second relay output is activated In order to block the thermostat function for a certain time span there are 3 time frames t1 t2 and t3 If for example the function should be activated only between 6 00 and 9 00 t1 E should be set to 6 00 and t1 A should be set for 9 00 If all of the thermostat time functions are set to 00 00 the themostat function will be in continuous operation factory setting For control and service work the operating mode of the controller can be manually adjusted by selecting the ad justment value HAND in which the following settings are available HND1 HND2 Operating mode OFF relay off AN blinking 2 AUTO ON relay on A blinking relay in automatic operation The menu language can be adjusted in this channel e dE German En English e t Italian Fr Fre
5. Another use outside the copyright requires the approval of STIEBEL ELTRON Inc This especially applies for copies translations micro films and the storage into electronic systems Editor STIEBEL ELTRON Inc Important notice Your own calculations and plans under consideration of the current norms and DIN directions should primarily be basis for your projects We don t offer a guarantee for the completeness of the drawings and texts of this manual they only represent some examples They can only be used at your own risk No liability is assumed for incorrect incomplete or false information and the resulting damages 08042 som 7 si monen indd STIEBEL ELTRON 08042 som 7 si monen indd SOM 7 SI e System Monitoring Display Up to 4 Temperature Sensors Pt1000 9 Selectable System Schemes Energy Production Measurement VBus Function Control e Thermostat Function with Time Control Service Center Software Connectivity User Friendly Operation Compact Easy to Install Housing Scope of delivery 1 x SOM 7 SI 1 x accessory bag 1 x spare fuseT4A 2 x screws and dowels 4 x strain relief and screws Additionally enclosed in the full kit 4 x sensor FKP6 Technical data Housing plastic PC ABS and PMMA Protection type IP 20 DIN 40050 Ambient temp 32 104 Size 172 x 110 x 46 mm Mounting wall mounting mounting into patch panels is possible Display System scre
6. x x x x x x option minimum limitation collector 1 ok BEEN nn o a coller CMN c c CMN1 CR ejej ejeje eje 18 18 18 minimun temperature collector 1 minimun temperature collector 1 d X option antifreeze collector 1 option antifreeze collector 1 antifreeze temperature collector 1 antifreeze temperature collector 1 rm amp M X emergency temperature collector 2 i 1 CO CO CO CO i AX amp option collector cooling collector 2 18 EM Kkwo maximum temperature collector2 18 oco Jx feoptonmimium limiatoncolecor2 18 iminium temperature collector2 18 _ oco jx fpeopt onanifeezecolecor2 f 18 cma j Jj Jo J fanfrezetemperaurecolector2 18 PRO 19 x x x x x x x x x gt d CIA Z N n e e elll O TDN DN TN TN 500 50 0 0 f Hn __ opti orc x x x x x x x x x foptiontube collector Dro fT xe x switch on temperature difference 3 corse Te x switch off temperature difference3 mxo j Jj Jj x switch on treshold for maximum temp MxF Sx j Jj p jJ x switch off treshold
7. 92 Ed OR 51 52 53 54 R1 2 08042 som_7_si monen indd 08042 som 7 si monen indd SOM 7 SI 1 2 8 Allocation of Clamps for System 8 1 2 9 Allocation of clamps for system 9 Solar System with After Heating by Solid Fuel Boiler with 1 tank 4 sensors 1 solar pump and 1 pump for after heating N R2IN RIJN L 12 13 14 15 16 17 18 19 20 L Pump for Solid Fuel Boiler Solar System and Heating Circuit Reverse Raising with 1 tank 4 sensors 1 solar pump and 1 3 way valve for heating circuit reverse raising Symbol Collector Sensor Lower Tank Sensor Upper Tank Sensor Heating Circuit Return Solar Pump 3 Way Valve 9 STIEBELELTRON SOM 7 SI 2 Opeartion and function 2 1 Pushbuttons for adjustment backward forward SET selection adjustment mode 2 2 System monitoring display Monitoring Display 2 2 1 Indication Channel c NE LJ LI Oo Indication channel Sp UN 2 2 2 RK AG Toolbar only illustrated above 10 STIEBEL ELTRON The controller is operated by the 3 keys below the display To enter the configuration mode toggle through the display parameters by pressing and releasing key 1 until this no longer causes the display to change At this point press and hold key 1 until the configuration parameters are displayed about 5 secon
8. Make sure that the check valve between the upper port of the lower heat exchanger and the output of the solar array is installed and functioning properly Check all configuration settings see section 4 2 Make sure that all system components are properly insulated Circulator pump is running collector is much Make sure that the controller is actually powering the circula hotter than store but the tank fails to heat up tor Is the symbol displayed in the tool bar If not check all configuration settings see section 4 2 Otherwise continue to step 2 HAZARDOUS VOLTAGE PRESENT 2 Check for 120 VAC between terminals 17 and 18 If the symbol is displayed and there is not 120 VAC between these two terminals call for service Check the system s flow meter Is the system getting the proper voumetric flow rate required by the collectors If not try adjusting the system s flow adjustment valve if present If the system is getting no flow even though the circulator is running there is either an obstruction in the collector loop or there is air in the system If the system recently experienced an overheating condition the problem is most likely the latter and the system needs to be purged There is also a possibility that the circulator pump itself is defective 08042 som 7 si monen indd 21 SOM 7 SI SIIEBELELTRON 6 Warranty WARRANTY RESIDENTIAL amp COMMERCIAL WARRANTY STIEBEL ELTRON WARRANTS TO THE
9. Heating with 1 tank 3 sensors and after heating thermostatic control options Sensor SA TRF can optionally be used for Energy Production Measurement Symbol 54 TRF Sensor for Energy Production Measurement Optional 08042 som 7 si monen indd 08042 som_7_si monen indd SOM 7 SI 1 2 5 Allocation of clamps for system 4 1 2 6 Allocation of clamps for system 5 Solar System with Layered Tank Charge with 1 tank 3 sensors 1 solar pump and a 3 way valve for layered tank charge Sensor 54 TRF can optionally be used for heat quantity balancing S4 TRF Sensor for Energy Production Measurement Optional Se 2 Tank Solar System with Valve Logic with 2 tanks 3 sensors 1 solar pump and 1 3 way valve Sensor S4 TRF can optionally be used for Energy Production Measurement S4 TRF Sensor for Energy Production Measurement optional Solar Pump 3 Way Valve 1 __ SOM 7 SI SIIEBELELTRON 1 2 6 Allocation of Clamps for System 6 2 Tank Solar System with Pump Logic with 2 tanks 3 sensors and 2 solar pumps optinal 1 2 7Allocation of Clamps for System 7 Solar System with East West Collectors 1 tank 3 sensors and 2 solar pumps This system is appropriate for any system with multiple collector banks with differing output power Symbol Specification Collector Sensor Tank Sensor 1 Collector Sensor 2 optinal OS
10. ORIGINAL OWNER THAT THE SOM 7 CONTROLLER WILL BE FREE FROM DEFECTS IN WORKMANSHIP AND MATERIALS FOR A PERIOD OF TWO 2 YEARS FROM THE DATE OF PURCHASE SHOULD THE PART S PROVE TO BE DEFECTIVE UNDER NORMAL USE DURINGTHIS PERIOD STIEBEL ELTRON INC WILL BE RESPONSIBLE FOR REPLACEMENT OF THE DETECTIVE PART S ONLY STIEBEL ELTRON INC IS NOT RESPONSIBLE FOR LABOR CHARGES TO REMOVE AND OR REPLACE THE DE FECTIVE PART S OR ANY INCIDENTIAL OR CONSEQUENTIAL EXPENSES SHOULD THE OWNER WISH TO RETURN THE SOM 7 CONTROLLER FOR REPAIR THE OWNER MUST FIRST SECURE WRITTEN AUTHORIZATION FROM STIEBEL ELTRON INC THE OWNER SHALL BE REQUIRED TO SHOW PROOF OF PURCHASE DATE AND TO PAY ALL TRANSPORTATION COSTS TO RETURN THE DEFECTIVE PART S OR SOM 7 CONTROLLER WARRANTY IS VOID IF SOM 7 CONTROLLER HAS BEEN INSTALLED OR USED IMPROPERLY OR IF DESIGN HAS BEEN ALTERED IN ANY WAY Stiebel Eltron Inc 17 West Street USA West Hatfield MA 01088 Phone 413 247 3380 Fax 413 247 3369 info stiebel eltron usa com Distributed by Comments The design and the specifications can be changed without advance notice The illustrations can differ from the production model 28 08042 som 7 si monen indd
11. for maximum temp mno j x J jx J switch on treshold for minimum temp war x J j jg switch off treshold for minimum temp ano j Ss j J 1 swith ontemp forthermosat 20 AE j x _ Jj swhoftempforthermosat x __ x x x j 5 c JotionWMZ J 16 jo o Jj Jj X jmaimumfow A J 16 jo o jJ Janireztype w 3 16 MED MEDT MEDT MEDT MEDT Jantfrezeconen 16 sno x 5 1 thermostat 20 mof J j Switch offtime 1 thermostat 20 Qo xJ J P Swthont me2thermotat 20 of x 5 2 thermostat 20 Bo J x 5 20 sof x p P Swthofme3termotat 20 ND x x x x x x x P x x manual operation relay2_ 20 NENE i END NEMUS MENS ONT ERN XXX wemammmber vens XXX sion number U X X X 08042 som 7 si monen indd 14 SOM 7 SI 4 1 1 Collector Temperatures COL COL1 COL2 Collector Temperature E display range 40 480 F 4 1 2 TankTemperatures TST TSTL TSTU TST1 TST2 Tank Temperatu
12. 5 Recooling Function p 19 Below is a list of the recommended switch on and switch off settings for the controller These options are available on all 9 system schemes These settings also need to be reset to the below values whenever the system scheme Arr 1 Arr 9 is changed Advanced users may want to set these differently depending on the circumstances Display Parameter Name Recommended Setting and Explanation Code and Reference All temperatures in F DTO Switch on Temperature 15 Setting this too low can cause the circulator to cycle on and Difference p 17 off too frequently DT Switch off Temperature 5 Too high of a AT between DT and DT can cause the Difference p 17 circulator to switch on and off too frequently 08042 som 7 si monen indd 21 SOM 7 SI STIEBEL ELTRON 4 2 1 Recommended Settings for Standard DHW System Arr 1 Display Parameter Name Recommended Setting and Explanation Code and Reference All temperatures in F DTO Switch on Temperature 15 Setting this too low can cause the circulator to cycle on and Difference p 17 off too frequently DT Switch off Temperature 5 Too high of a AT between DT and DT F can cause the Difference p 17 circulator to switch on and off too frequently 140 This will prevent the temperature at the top of the tank from getting hot enough to cause the T amp P valve to release This will also allow the cooling funct
13. DT20 DT30O is sensed the pump is activated If the adjusted switch off temperature is measured DTF DT1F DT2F DT3F the controller switches off If the adjusted maximum temperature is exceeded further loading of the store is stopped so that a damaging overheating can be avoided If the maximum store temperature is exceeded the symbol is displayed Please note The controller is equipped with a security switch off of the storage tank which will not allow further loading of the tank if it reaches 205 F The Maximum Temperature Limitation regulates the temperatures at which the second differential switch on temperature will operate This feature is only available if Arr 2 or Arr 8 is selected for solid fuel boilers or heat exchange regulation If the relavent sensor measures a temperature greater than relay 2 is disabled Relay 2 will not be enabled again until a temperature less than MX3F is reached Reference sensor 53 by Arr 8 TSTU S4 by Arr 2 TST2 The Minimum Temperature Limitation also works in conjunction with the second differential switch on temperature If the relavent sensor measures a temperature less than MN3O relay 2 will be disabled Relay 2 will not be enabled again until a temperature greater than MN3F is measured by the relavent sensor Reference sensor S4 by Arr 8 TFSB 53 by Arr 2 TSTU 17 STIEBELELTRON SOM 7 SI 4 1 11 Collector Emergenc
14. LELTRON _ 4 Control parameter and indication channels 4 1 Channel overview Legend Corresponding channel is available Corresponding channel is available if the appropriate option is activated Please note S3 and S4 are only indicated in case of sensors connected X lp DT1F S1 MX DT2O S2MX U un U UJU lt Corresponding channel is only available if the option Energy Production Measurement is activated OHQM Corresponding channel is only available if the option Energy Production Measurement is deactivated MEDT The channel antifreeze content MED is only shown if the antifreeze is not water or Tyfocor LS G LS MEDT 0 or 3 Adjustments concerning the antifreeze content will only make sense if the antifreeze is used in the solar circuit J uoo o Operating hours relay 1 Oo o N 1 1 1 1 1 1 1 1 1 15 15 15 15 15 15 12 7 7 7 7 7 7 7 8 8 13 STIEBEL ELTRON ee ane ee ee LU ea eae ee ee EE EE pude ae ocx x x x x x x x x cooling collector1 18 oca leoptoncolecorcoolingcollctor 1 18 cmx x x x x x x x x maximum temperaturecollector 1 18 cwad maximum temperature collector1 18 FOKN x x
15. SOM 7 SI Installation Configuration and Troubleshooting Manual STIEBEL ELTRON SOM 7 SI Thanks for buying this product Read this manual carefully to get the best perfomance from this unit 49004470 manual SOM 7 SI Contents Imprint Safety regulations 2 Technical data and overview of functions 3 1 Installationen 4 1 1 Moun ONE sssaaa 4 1 2 Electrical Connection RM Tm 4 1 2 1 Data communication BUS 5 1 2 2 Standard Solar 5 1 2 3 Solar System with Heat Exchange 6 1 2 4 Solar System with After Heating 6 1 2 5 Solar System with Layered Tank Charge 7 1 2 6 2 Tank Solar System with Valve Logic 7 1 2 7 2 Tank Solar System with Pump Logic 8 1 2 8 Solar System with East West Collectors 8 1 2 9 Solar System with After Heating by Solid Fuel Boiler 9 1 2 10 Solar system with heating circuit return flow 9 2 Opearation and function 10 Safety regulations Please read the following information carefully before installing and operating the controller When configuring the controller please change the default settings as illustrated in section 4 2 This will avoid damage to the solar sys
16. aded the lower ranking tank is checked If the lower ranking tank can be charged this is effected by the so called oscilating charge time tRUN When the oscillating charge time is over the loading is stopped The controller regulates the increase of the collector temperature If it increases by the collector rising temperature AT Col 4 F fixed software value the expired break time is again reset to zero and the oscillating break time starts again If the switch on conditions of the priority tank are not reached the loading of the lower ranking tank is continued If the priority switch has reached its maximum temperature the oscillating charge is not effected This setting is designed to be used in conjunction with the System Cooling Function which overrides the maximum store temperature S MX S1MX S2MX when used This function will cool the tank back down to its maximum temperature when the collector temperature becomes low enough to facilitate such This prevents a cumulative overheating condition if the cooling function needs to be used multiple days in a row In order to utilize this function with tube collectors a heat rejection loop heat dump is necessary If the controller measures an increase of 4 F compared to the collector temperature which was last stored the solar pump is switched on for about 30 seconds After the solar pump is deactivated the current collector temperature is stored as new reference value If the m
17. conds The controller re turns automatically into indication mode 08042 som 7 si monen indd 08042 som 7 si monen indd SOM 7 SI 4 1 8 AT regulation DT O DT1O DT2O DT3O am E e Switch on temperature Ht lies differential i C T Adjustment range 2 0 40 0 F Factory setting 12 0 T DT F DT1F DT2F DT3F 4 zn Switch off temperature Bo differential Adjustment range 1 0 38 0 F Factory setting 8 0 F Please note Switch on temperature difference DT O must be at least 2 F higher than the switch off temperature difference DT F 4 1 9 Maximum Tank Temperature S MX 51 S2MX Maximum storage tank temp GM X Adjustment range 40 205 F m Pu Factory setting 140 F 7 4 1 10 AT controller solid fuel boiler and heat exchange Maximum Temperature Limitation MX30 MX3F Maximum temperature limi tation MX SET Adjustment range mon MX30 137 205 F MX3F 30 136 F Factory settings X f i MX3O 140 F MX3F 136 F Minimum Temperature Limitation MN3O MN3F Minimum Temperature Limitation MN3 as Adjustment range Lima Arr 2 ul MN3O 30 49 F MN3F 41 195 F MN IF Arr 8 DS SET MN3O 30 149 F 500 141 195 F Factory settings Arr 2 MN3O 40 F MN3F 50 F Arr 8 MN3O 140 F MN3F 150 F Primarily the controller works in the same way as a standard differential controller If the switch on difference DT O DT10
18. damage to the system from overheating Installing the SOM 7 with the default settings will likely result in an overheating condition of the solar system 4 2 2 1 SOM 7 Wiring Diagram for Connection to Cold Start Boiler In order to interface the SOM 7 with the boiler control board of a typical boiler which does not heat up the boiler water unless a zone calls for heat it is necessary to incorporate a relay circuit Below is a wiring diagram in which a commonly used single zone controller in conjunction with a SOM is controlling such a boiler N O Taco SR501 T y pical Wiring Thermostat Input Boiler Control Board 08042 som_7_si monen indd 24 SOM 7S STIEBEL ELTRON __ 5 Troublesooting Tips If a malfunction occurs it will be indicated on the display of the controller RESOL DE 45527 Hattingen DeltaSol BS Plus CU 72060171 01 UL 60730 1A 2002 CSA E60730 1 2002 Resistance values of the Pt1000 sensors Symptom Possible Cause and Remedies List Operating control lamp flashes red The Pa SOM unit is sensing an open circuit condition 1 Measure the resistance between the two terminals to which the relevent sensor is attached If it measures infinite resis tance continue to step 2 If it measures a resistance within range of the above chart call for service Disconnect the sensor wire from the terminals and measure the resistance between the two wires If it still measur
19. ds then quickly release the key to avoid tog gling to the end of the parameter list The first parameter in the list is DT O To change the setting of a given parameter follow the steps below 1 Toggle to the parameter using keys 1 and or 2 The abbreviation for the parameter is displayed on the right side of the screen with the setting directly below and the set icon solid not blinking on the extreme right 2 Press key 3 The set icon begins blinking signifying that the parameter may now be adjusted 3 Quickly use keys 1 and or 2 to change the setting to that which is required 4 Press key 3 again The set icon stops blinking signifying that the new value has been stored The system display consists of an indication channel a tool bar and the system screen These are detailed below The indication channel consists of two lines The upper line is an alphanumeric 16 segment display in which an abbreviation of the current setting or reading is shown In the lower 7 segment display the value of said reading or setting is shown The additional symbols of the tool bar indicate the current system status standard blinking maximum tank limitation active maximum tank temperature exceeded collector minimum limitation antifreeze function activated or antifreeze function active collector cooling function or reccoling function active collector security shutdown or tank securtiy shutdown act
20. easured temperature new reference value is again exceeded by 4 F the solar pump again switches on for 30 seconds If the switch on differential is reached during any of these processes the controller automatically switches over to solar charging If the collector temperature drops by 4 F while the system fluid is stagnant the switch on value for the special tube collector function will be recalculated 19 STIEBELELIRON SOM 7 SI 4 1 18Thermostat Function Arr 3 Afterheating HH Lam mec Thermostat Switch on Temperature Adjustment range 30 205 F Factory setting 105 F Ll E Ll L SET 700 00 LI LULILI t1 E 2 E 3 E Thermostat switch on time Adjustment range 00 00 23 45 Factory setting 00 00 4 1 19 Operating Mode HND1 HND2 Operating Mode Adjustment range OFFAUTO ON Factory setting AUTO 4 1 20 Language LANGUAGE Language Setting Adjustment range dE En It rr Factory setting En use of surplus energy FH AH F Thermostat Switch off Temperature Adjustment range 30 205 F Factory setting 115 F t1 A t2 A t3 A Thermostat switch off time Adjustment range 00 00 23 45 Factory setting 00 00 HNI INL Auto HN dic s DUNS ee Il Ll 1 LNG 4 1 21 Units for Temperature Display UNIT Temperature Display Units Adjustment range FAH CEL Factory setting FAH 20
21. egin heating the tank water via the upper heat exchanger Recooling Function OREC a AHO Thermostat Switch Off 125 Or whatever temperature the user wants the boiler to Temperature p 20 stop heating the tank water via the upper heat exchanger 1 0 t3 Thermostat Switching 00 00 Unless there are certain times the day when the boiler dba Times p 20 loop should not switch on OHOM Energy Production Off Unless the installer has installed a sensor in position S4 and Q Measurement p 16 wishes to utilize this function HND1 Solar Pump Operating Auto This is the normal operating mode The other two Mode p 20 modes are for testing charging etc HND 2 Boiler Loop Operating Auto This is the normal operating mode The other two Mode p 20 modes are for testing charging etc En English For most applications in North America this is LANG Language p 20 appropriate with some exceptions 23 aes STIEBELELTRON __ SOM 7 SI STIEBEL ELTRON Display Parameter Name Recommended Setting and Explanation Code and Reference All temperatures in F UNIT Units for Temperature FAH For most applications in North America this is Display p 20 appropriate but it is purely a matter of preference Please note that advanced users may desire to adjust certain parameters differently depending on the circumstances These suggested settings are merely a manner in which to configure the unit that will avoid
22. en for sys tem visualisation 16 segment display 7 segment display 8 symbols for system status and operating control lamp STIEBELELIRON _ 28 a em Q Q 110 Operation by 3 pushbuttons in the front of the housing Functions Differential temperature controller with optional add on system functions Function control according to BAW standards operating hours counter for solar pump tube collector special function thermostat function and heat quantity balancing Inputs for 4 temperature sensors Pt1000 Outputs 2 electromechanical relays 155 x Bus VBus Power supply 120VAC Total power supply 4 2 A 120VAC 3 1 Installation 1 1 Mounting Warning Switch off power supply before y opening the housing display The unit is designed for indoor installation only It is not suitable for installation in hazardous locations and should not be sited near to any electromagnetic field The controller cover These regulations vary from region to region Please contact the appropriate agency in your area if unclear on this Wall Mounting Instructions 1 Unscrew the cross recessed screw of the cover and can fuse 4A remove it from the housing cable conduits with strain relief 2 Mark the upper fastening point on the wall and mount the enclosed dowel and screw
23. es infi nite resistance continue to step 3 If it measures a resistance within range of the above chart there is a problem with the connection from the sensor wire to the terminal This problem lies either with the sensor or the wire connec tions In order to determine whether the problem lies with the sensor itself the sensor must be disconnected from any extension wire and its resistance must be measured If when the sensor is disconnected the resistance is measured to be within the values of the resistance chart the problem is with the extension wire connections symbol is displayed and the A symbol is flashing The indication channel of the relevent sensor displays 888 8 instead of the temperature 08042 som 7 si monen indd 25 Symptom Possible Cause and Remedies List SOM unit is sensing a short circuit condition 1 Measure the resistance between the two terminals to which the relevant sensor is attached If it measures a resistance close to zero continue to step 2 If it measures a resistance within range of the above chart call for service Disconnect the sensor wire from the terminals and measure the resistance between the two wires If it still measures a resistance close to zero continue to step 3 If it measures a resistance within range of the above chart there is a problem with the connection from the sensor wire to the terminal This problem lies either with the sensor or the wire connec tions In order
24. ing to the maximum flow rate of the system in liters per minute This is necessary in order to calculate in steps of 0 1 cm the system s actual energy output Some controllers have Factory setting 6 0 40 an additional parameter FMXG which is the flow rate gallons per minute Type of antifreeze Adjustment range 0 3 ME 1 4 4 of antifreeze Factory setting 1 I 0 water 1 propylene glycol 2 ethylene glycol Concentration of ME I 3 Tyfocor LS G LS antifreeze in Vol 76 IL7 1141 gu MED is blinded out by utc MEDT 0 and 3 E Adjustment range 20 70 Factory setting 45 The energy produced by the system is measured by the ey 1 1 IL calculation of the volume of heat exchanger fluid moved tion in kWh MWh INET Display channel 16 through the system and a comparison of the temperature of the fluid leaving the collector S1 with that of the fluid exiting the storage tank s heat exchanger S4 It is shown in kWh in one channel and MWh in another The total energy produced can be reset As soon as one of the display channels of the heat quantity is selected the sym bol is displayed solid To reset the total energy produced press and hold the middle key key 3 for approximately 5 seconds The set symbol blinks Press key 3 again and the total energy produced is reset to O In order to interrupt the RESET procedure no button should be pressed for about 5 se
25. ion to operate effectively Collector Emergency 310 This prevents the HX fluid directly behind that in the Shutdown Temperature sensor well from causing the system to go into emergency p 18 shutdown mode as soon as the cooling function is activated EM OCX System Cooling On Failure to change this option to on will likely result in Function p 18 overheating of the system at some point 230 Having a relatively large AT between CMX and EM Maximum Collector prevents the HX fluid directly behind that in the sensor well Temperature p 18 from causing the system to go into emergency shutdown mode as soon as the cooling function is activated OCN Minimum Collector Off The AT between DT and DT F achieves the requisite Temperature p 18 effect for most situations Off Unless the system is located in a region which rarely experiences temperatures near freezing and a very low glycol to water percentage is being used Maximum Store S MX Temperature p 17 CMX Antifreeze Option OCF p 18 On This prevents a cumulative overheating of the system by Recooling Function OREC p 19 ensuring a relatively high At between the tank temperature and and the security switch off of the tank 205 OTC Tube Collector Off Unless the system is utilizing tube collectors Function p 19 Energy Production Off Unless the installer has installed a sensor in position 54 and y T easuremen
26. ive an adjustment channel is changed SET mode 08042 som 7 si monen indd 08042 som_7_si monen indd SOM 7S STIEBEL ELTRON __ 2 2 3 System screen The system screen active system scheme shows the dm schemes selected on the controller It consists of several nr EN system component symbols which are depending on the Dec 3 current status of the system either flashing permanently shown or hidden System Screen only Sensors upper sensor tank Collector 2 Heating circuit Collector 1 Valve 2 Valve Sensor Additional symbol for operation of the burner Tank heat exchanger Tank Tank 2 or afterheating with an additional symbol Collectors C Temperature sensor with collector sensor Heating circuit Tanks 1 and 2 with heat exchanger Pump 3 way valve e J Ly The flow direction or the g Afterheating current breaking capacity ith b bol with burner symbo is always shown 2 3 Blinking codes 2 3 1 System screen blinking codes e Pumps are blinking during starting phase e Sensors are blinking when their value is being displayed in the indication channel e Sensors are quickly blinking in case of sensor defect Burner symbol is blinking if after heating is activated 2 3 2 LED blinking codes Constantly green Normal operation Red green blinking Power up phase Manual operation Red blinking Sensor defect sensor symbol is quickly blinking 11
27. n reached Check to see if the amp symbol is blinking If this is the case the system is in Emergency Shutdown Mode Either the collector sensor measured a temperature equal to or greater than the Collector Emergency Shutdown Temperature step 3 or the store sensor measured a temperature of at least 205 F step 4 If the system has reached the Collector Emergency Shut down Temperature the controller s configuration needs to be checked Is the cooling function OCX set to on Is there a sufficiently large AT between the Maximum Collector Temperature CMX and the Collector Emergency Shutdown Temperature EM To get the system to exit emergency shutdown mode the EM setting must be at least 30 F greater than the measured collector temperature If the storage tank has reached its emergency shutdown tem perature 205 F the circulator will not turn on unless the store sensor measures a temperature of 201 F or less This parameter is not adjustable 26 08042 som 7 si monen indd MUTTER STIEBEL ELTRON SOM 7S STIEBEL ELTRON __ Possible Cause and Remedies List LED is blinking red and green Check the Circulator Pump Operating Mode HNDx This should be set to auto If it is set to either on or off the unit will flash red and green the amp symbol will flash and the symbol will be displayed If the unit is in its power up mode this condition is normal Tank temperature cools excessively overnight
28. nch The menu unit can be adjusted FAH e CEL 08042 som_7_si monen indd STIEBEL ELTRON SOM 75 STIEBEL ELTRON __ 4 2 Recommended Settings for any System Scheme Below is a list of important settings which must be changed from their default value no matter what system scheme Arr 1 Arr 9 is being used Any time the system scheme is changed these values need to be reset to the below values If this is not done there is a very good chance that the system will overheat and thus be in need of time consuming and possibly costly repairs Display Parameter Name Recommended Setting and Explanation Code and Reference All temperatures in F Collector Emergency 310 This prevents the HX fluid directly behind that in the Shutdown Temperature sensor well from causing the system to go into emergency p 18 shutdown mode as soon as the cooling function is activated OCX System Cooling On Failure to change this option to on will likely result in Function p 18 overheating of the system at some point 230 Having a relatively large AT between CMX and EM Maximum Collector prevents the HX fluid directly behind that in the sensor well Temperature p 18 from causing the system to go into emergency shutdown mode as soon as the cooling function is activated On This prevents a cumulative overheating of the system by ensuring a relatively high At between the tank temperature and and the security switch off of the tank 20
29. o blink but keys 1 and 2 now cause the minutes to change Pressing key 3 again causes the displayed value to be stored 15 STIEBELELTRON SOM 7 SI STIEBEL ELTRON 4 1 6 Operating hours counter hP hP1 hP2 The operating hours counter adds up the solar operating IL A hours of the respective relay h P h P1 hP2 The total 1 a amount of hours which the relay has been active is shown Indication channel on the display The operating hours total can be reset As soon as the oper ating hours channel is selected the symbol is displayed solid To reset the operating hours press and hold the middle key key 3 for approximately 5 seconds The set symbol blinks Press key 3 again and the operating hours counter is reset to 0 In order to interrupt the RESET procedure don t press any button for about 5 seconds The controller returns automatically into the display mode 4 1 7 Energy Production Measurement OHOM Energy Production A measurement of the system s energy production is pos BY sible in conjunction with a flowmeter and an additional Measurement Adjustment LIM hich he hert h range OFF ON LJ LYI ea sensor Wen eae t e e anger s oe Factory sette OFF perature Activate this option by changing the value FMAX Volumetric flow rate in l min Adjustment range 0 20 F MAX to on Adjust this sett
30. ons 08042 som_7_si monen indd STIEBEL ELTRON 08042 som_7_si monen indd SOM 7 SI 1 2 1 Data communication Bus CU 72060171 01 UL 60730 1A 2002 00 60730 1 2002 VBus connection clamps 1 2 2 Allocation of Clamps for System 1 The controller comes with aVBus for data communication and energy supply of external modules The connection is effected with optional polarity at the clamps marked with VBus Via this data bus you can install one or more VBus modules Energy Production Measurement Module WMZ M1 Large Display Data Logger DL1 Data Teleindication DFA2 The controller can also be connected to a PC with the help of a RS COM adapter With the Service Center Software RCS the controller parameters can be changed measurements can be read out processed and visualised The software enables an easy function control and adjustment of the system Standard Solar System with 1 tank 1 pump and 2 sensors Sensor S4 TRF can optionally be used for Energy Production Measurement Symbol Specification 53 Upper Tank Sensor KENN uu 54 TRF Sensor for Energy Production Measurement optional Solar Pump 5 STIEBELELTRON __ SOM 7 SI SIIEBELELTRON 1 2 3 Allocation of Clamps for System 2 Solar System with Heat Exchange with an existing tank With 1 tank 4 sensors and 2 pumps 1 2 4 Allocation of Clamps for System 3 Solar System with After
31. res Display range 40 480 F 7 rcd DU Lm 4 1 3 Sensor 3 and Sensor 4 Temperatures S3 S4 S3 S4 s J Sensor Temperatures a 4c Display range 40 480 F 4 1 4 Other Temperatures TFSB TRET TRF Other Measured FSH Temperatures Display range 40 480 F 12 10 4 1 5 Time w pw H PE m i L1 Ch 08042 som 7 si monen indd Shows the current collector temperature COL collector temperature 1 collector system e COL1 collector 1 temperature e COL2 collector 2 temperature Shows the current tank temperature e ST tank temperature 1 tank system e TSTL tank temperature lower e TSTU tank temperature upper e 5 1 tank 1 temperature e TST2 tank 2 temperature Shows the current temperature of the corresponding addi tional sensor without control function e 3 sensor 3 temperature e S4 sensor 4 temperature Please note 53 and 54 are only shown if the temperature sensors are connected Shows the current temperature of the corresponding sensor e TFSB solid fuel boiler temperature e TRET heating reverse raising temperature e TRF return flow temperature This channel stores and displays the current time in 24 hour format change the stored time press the key 3 for 2 seconds This causes the icon to blink and the hour may be adjusted using keys 1 and 2 To adjust the minutes press key 3 again The icon continues t
32. t p 16 wishes to utilize this function HND1 Circulator Pump Auto his is the normal operating mode The other two Operating Mode p 20 modes are for testing charging etc En English For most applications in North America this is LANG Language p 20 appropriate with some exceptions UNIT Units for Temperature FAH For most applications in North America this is Display p 20 appropriate but it is purely a matter of preference Please note that advanced users may desire to adjust certain parameters differently depending on the circumstances These suggested settings are merely a manner in which to configure the unit that will avoid damage to the system from overheating Installing the SOM 7 with the default settings will likely result in an overheating condition of the solar system 08042 som 7 si monen indd 22 08042 som_7_si monen indd 4 2 2 Recommended Settings for Standard DHW System with Boiler Backup Arr 3 Display Parameter Name Recommended Setting and Explanation Code and Reference All temperatures in F DT O Switch on Temperature 15 Setting this too low can cause the circulator to cycle on and Difference p 17 off too frequently DT Switch off Temperature 5 Too high of a AT between DT and DT can cause the Difference p 17 circulator to switch on and off too frequently 140 This will prevent the temperature at the top of the tank from getting hot enough to cause the T amp P val
33. tem by common problems such as overheating Installing the controller using the default settings without making any adjustments to the configuration parameters is likely to result in an overheating condition of the solar system at some point Please also note that changing the system scheme Arr 1 9 will reset all settings to the defaults Please ensure that the mounting is in accordance to local state and federal regulations CU 72060171 01 UL 60730 1A 2002 CSA E60730 1 2002 2 1 Adjustment buttons 10 2 2 System monitoring lt gt 10 2 2 1 Channel indication EO 10 2 2 2 10 2 2 3 Syste eee 11 2 3 sed 11 2 3 1 System Screen Blinking 11 2 3 2 LED blinking COM CS aue 11 3 Primary commissioning ecce eeeeeeee 12 4 Control parameter and display channels 13 4 1 Channel OVGEVIGW 13 4 1 1 6 Indication channels eere 15 4 1 6 21 Adjustment chanhels Gps sape 16 4 2 Recommended Settings 21 5 Troubleshooting 23 6 WV AP VANE e 28 Reprinting copying This installation manual in its entirety is copyrighted
34. to determine whether the problem lies with the sensor itself the sensor and its wire which was factory installed must be disconnected from any extension wire and its resistance must be measured If when the sensor is discon nected the resistance is measured to be within the values of the resistance chart the problem is with the extension wire connections Operating control lamp is off and screen is blank SOM unit s control board is not receiving power HAZARDOUS VOLTAGE PRESENT 1 Measure the voltage between terminals 19 and 20 If the volt age is close to the nominal voltage of 120 VAC continue to step 2 If the voltage is not correct the problem lies with the power supply to the unit Remove the unit s can fuse and measure its resistance If the resistance is close to zero call for service If infinite resistance is measured replace the fuse Operating control lamp flashes red The f symbol is displayed and the N symbol is flashing The indication channel of the relevent sensor displays 88 8 instead of the temperature Collector is much hotter than the storage tank Compare the tank s present temperature with its maximum but the systems circulator is not on setting S MX If the storage tank is within 4 degrees of this setting the circulator pump will not turn on even if the switch on temperature has been reached unless the System Cooling Function OCX is turned on and the Maximum Collector Temperature CMX has bee
35. ts the degradation of the fluid s corrosion inhibitors avoiding damage to the system components If the system cooling function is activated the symbol J is flashing If the maximum collector temperature CMX CMX1 is reached the maximum storage tank temperature S MX S1MX S2MX is overridden and the system s circulator pump is turned on cooling the system s HX fluid using the water in the storage tank This will continue until either the collector temperature is measured to be at least 9 F lower than the setting of CMX CMX1 CMX2 the tank reaches it s 205 F security switch off temperature or the collector reaches its collector emergency shutdown temperature The last two instances should not occur if the system is sized and configured properly The minimum collector temperature is a temperature which must be exceeded in order for the solar pump R1 R2 to be switched on The minimum temperature setting is used to avoid starting up the solar pump or solid fuel boiler charging pumps when the temperature of the heat exchanger fluid is too low If the minimum temperature feature is activated the symbol is shown on the display blinking The antifreeze function activates the loading circuit between collector and tank if the antifreeze temperature is reached in order to protect the heat exchanger fluid against freezing or thickening If the antifreeze temperature is exceeded by 2 F the loading circuit will be deactivated
36. ve to release This will also allow the cooling function to operate effectively Collector Emergency 310 This prevents the HX fluid directly behind that in the Shutdown Temperature sensor well from causing the system to go into emergency shutdown mode as soon as the cooling function is activated OCX System Cooling On Failure to change this option to on will likely result in Function p 18 overheating of the system at some point 230 Having a relatively large AT between CMX and EM Maximum Collector prevents the HX fluid directly behind that in the sensor well Temperature 18 from causing the system to go into emergency shutdown mode as soon as the cooling function is activated OCN Minimum Collector Off The AT between DT O and DT F achieves the requisite Temperature p 18 effect for most situations Off Unless the system is located in a region which rarely experiences temperatures near freezing and a very low glycol to water percentage is being used Maximum Store Temperature p 17 WY z lt x Antifreeze Option OCF p 18 On This prevents a cumulative overheating of the system by ensuring a relatively high At between the tank temperature and and the security switch off of the tank 205 Tube Collector Off Unless the system is utilizing tube collectors OTC Function 19 AHO Thermostat Switch On 115 Or whatever temperature the user wants the boiler to Temperature p 20 b
37. y Shutdown Temperature EM EM1 EM2 Collector Emergency Shutdown Temperature L M am Adjustment range 230 400 F con Factory setting 285 F 4 1 12System Cooling Functions OCX OCX1 OCX2 System Cooling FI v SET Adjustment range OFF ON oe m Ta Factory setting OFF LII CMX CMX1 CMX2 Maximum Collector Mv LIIA Temperature 2cn Adjustment range cou 210 380 F Factory setting 250 F 4 1 13 Minimum Collector Temperature Limit OCN OCN1 OCN2 Collector Minimum FIN Temperature Limitation Adjustment range OFF ON UF n CMN CMN1 CMN2 Collector Minimum LI UN Temperature D H Adjustment range 50 195 F Factory setting 50 F 4 1 14Antifreeze Function OCF OCF1 OCF2 Antifreeze Function T pa Adjustment range OFF ON mc P Factory setting OFF LIT CFR CFR1 CFR2 Antifreeze Temperature F fe Adjustment range 15 50 F T Factory setting 40 F 18 STIEBEL ELTRON If the collector emergency shutdown temperature EM EM1 EM2 is reached the solar pump R1 R2 is deactivated in order to avoid damaging the solar components The default setting is 285 F If the system is in emergency shutdown mode the symbol is flashing The system will not exit this mode until the temperature measured is 30 F lower than the value of this setting The system cooling function is used to prevent the system s heat exchanger fluid from overheating This in turn preven
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