Installation and operating instructions Logamatic SC20
Contents
1. Z gel oedsy ed sapuljAy S40199 OO JO JequunN 40je1edo wayskS 6 BoJ sasn Logamatic SC20 Technical specifications are subject to change without prior notice Buderus Cotswold Way Warndon Worcester WR4 9SW Customer service 0870 421 5933 Technical support 0870 421 5944 Fax 01905 753130 www buderus co uk In the UK and IE Buderus is a brand name of Bosch Thermotechnology Ltd 7147017471 Buderus2. e Isolate the controller from the mains power supply before opening Domestic hot water temperature e To limit the DHW outlet temperature to max 60 C fit a thermostatic blending valve Standards and guidelines e Ensure that installation and operation of the device conforms to the local standards and guide lines Disposal e Dispose of packaging in an environmentally responsible manner e When replacing components dispose of the old parts in an environmentally responsible manner Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 3 EN Safety instructions and explanation of symbols 1 2 Symbols f Warnings are indicated by a warning triangle and a grey background The terms indicate the seriousness of the ensuing risk if measures for minimising damage are not taken Caution indicates that minor damage to property could result Warning indicates that minor injury or severe damage to property may occur Danger indicates that serious personal injury could result In particularly serious cases lives could be at risk Notes are identified by the symbol shown on the left They are bordered by horizontal lines above and below the text Notes contain important information in cases where there is no risk of personal injury or damage to property Buderus 4 Logamatic SC20 Technical specifications are subject to change without prior notice Details of the produ
3. sory 3 Temperature sensor T2 for displaying temperature and control value for storage cylinder bot tom 4 Temperature sensor T1 for displaying temperature and control value for collector 5 Solar pumping station max 1 1 A Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 11 EM Operation 5 Operation Notes for the user Your heating technician will set the solar thermal system when commissioning it and it will run auto matically e Do not switch off the solar thermal system during long absences e g when going on holiday When installed according to the manufacturer s specifications the solar thermal system is intrin sically safe e Do not modify the controller settings e After a power failure or a long absence check the operating pressure on the pressure gauge of the solar pumping station See next section for pressure guage location Section 8 4 page 22 Notes for heating technicians e Hand all documents to the customer e Explain to the user how the device works and how to operate it 5 1 Elements of the solar pumping station The main components of the solar pumping station are Thermometers gt Fig 7 items 1 and 3 The built in thermometers display the temperatures of the solar return blue from the solar cylinder to the collector field and flow red from the collector field to the solar cylinder Pressure gauge gt Fig 7 item 2 The pressu
4. Buderus e Do not commission the solar thermal system at sub zero temperatures Together with the solar pumping station observe the following steps e Check the system is clear of air e Check and adjust the flow rate e Enter the controller settings in the commissioning and maintenance report installation and operating instructions for the solar pumping station To prevent undesired starting of the pump when the power supply is connected the f Warning System damage due to incorrectly set operating mode controller has been factory set to manual mode off e For normal operation set the controller to Auto Section 5 5 page 14 Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 17 Faults 7 Faults 7 1 Faults indicated on the display In the event of a fault the display flashes red In addition the type of fault is indicated by symbols e Forthe user if a fault occurs contact your installer Type of fault Uma 0 riecne Romeay 7 Sensor failure temperature sensor for collector or storage cylinder Pump is switched off Temperature sensor not Check sensor connections incorrectly connected Check the temperature sen sor for damage or incorrect installation position Temperature sensor orsensor Replace the temperature sen lead defective sor Check the sensor cable Collector temperature sensor short circuit Pump is switched off Temperature senso
5. C below the maximum cylin mum storage cylinder tempera der temperature the pump switches ture on Collector temperature T1 is When the temperature drops close to or above the set maxi 5 K C below the maximum collec mum collector temperature tor temperature the pump switches on Pump not running although the circuit animation is showing on the display The solar storage cylinder is The line to the pump is interrupted Check the line not being supplied by the or not connected solar thermal system Pump is faulty Check the pump and replace if nec essary Circuit animation running on the display pump humming The solar storage cylinder is The pump is stalled Unscrew and remove the slotted not being supplied by the screw on the pump head and use a solar thermal system screwdriver to release the pump shaft Do NOT strike the pump shaft Temperature sensor is displaying an incorrect figure Pump is being activated Temperature sensor not correctly Check position installation and type deactivated too early too installed Incorrect temperature of sensor add heat insulation if nec late sensor installed essary Domestic hot water is too hot Tab 6 Possible faults not indicated on the display Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 19 Faults Type of fault ma 0 meten R0 Risk of scalding are set too high Domestic hot wat
6. modulation This function increases the efficiency of the solar system It on off attemps to keep the temperature difference between the tempera on ture sensors T1 and T2 at the cut in temperature difference Buderus recommends leaving this setting activated Minimum speed for pump speed modulation This function specifies the minimum pump speed thus enabling 30 100 adaptation of the speed modulation function to suit the particular 50 solar system configuration Tab 4 Service level functions Buderus 14 Logamatic SC20 Technical specifications are subject to change without prior notice Operation min max if DMF Collector maximum and minimum temperature If the collector maximum temperature is exceeded the pump is switched off If the temperature falls below the collector minimum temperature 20 C the pump will not cut in even if the other conditions for switching on are met Evacuated tube collector function To pump hot solar solar fluid to the sensor when the collector array temperature is greater than 20 C the pump is switched on for 5 seconds every 15 minutes Mediterranean climate functionThis function is intended solely for higher temperature regions and not the UK or IE Double Match Flow only with temperature sensor T3 The pump speed modulation function be set to ON if this func tion is to be used This function is used for fast charging of the top part of the cylin der to 4
7. 5 C to prevent reheating of the domestic hot water by the boiler It attemps to keep the temperature difference between the temperature sensors T1 and T2 to 15 K C or 30 K C depending on the temperature at T3 Information This function displays the software version Tab 4 Service level functions Logamatic SC20 Technical specifications are subject to change without prior notice range default 100 140 C 120 C on off off on off off Buderus 15 Setting range Display default Manual mode on on off Auto Manual mode on switches the pump on for a maximum of 12 off hours The display alternates between on and the selected time Circulation of the solar fluid is shown by the animation on the dis play gt Fig 8 item 8 Safety functions such as maximum collec tor temperature remain activated After a maximum of 12 hours the controller switches over to auto matic mode Manual mode off The pump is switched off and circulation of the solar fluid stops The display alternates between off and the selected time Manual mode Auto If the cut in temperature difference between the two temperature sensors is exceeded the connected pump cuts in Circulation of the solar fluid is shown by the animation on the display gt Fig 8 item 8 When the cut out temperature difference is reached 1 2 of the cut in temperature difference the pump is switched off Defaul
8. 7 747 017 471 GB 2007 08 OSW Installation and operating instructions 7747006071 00 1 SD Logamatic SC20 Solar thermal controller For the Heating Engi neer Owner Please read carefully prior to installation and operation Buderus EE Contents Contents Safety instructions and explanation of symbols General safety instructions 1 2 Symbols 2 Details of the product 2 1 EU Declaration of Conformity 2 2 Package contents 2 3 Product description 2 4 Specifications 3 Regulations 4 Installation for heating technicians only 4 1 Wall mounting the controller 4 2 Electrical connections 4 2 1 Preparing cable entry 4 2 2 Connecting the leads 5 Operation 5 1 Elements of the solar pumping station 5 2 Elements of the controller 5 3 Operating modes 5 4 Displaying temperature values 5 5 Service level menu for heating technicians only 6 Commissioning for heating technicians only 7 Faults 7 1 Faults indicated on the display 7 2 Faults not indicated on the display 8 Notes for the user 8 1 Why is regular maintenance important 8 2 Important notes on solar fluids 8 3 Checking the solar thermal system 8 4 Checking operating pressure with possible re adjustment 8 5 Cleaning the collectors 9 User s log Buderus O N O O Oi CQ 10 10 11 12 12 13 13 14 14 17 18 18 19 21 21 21 21 22 22 23 2 Logamatic SC20 Technical specif
9. K cylinder a qwe e ee e pe Ew me m pem m vm o es m ee e os m e w em w ie w oe e or m eo De que m oer De or m em m que m em m o w on Dm om a em Dm om o mw m e m sw ue em Tab S Resistances of the temperature sensors The temperature sensors must be disconnected from the controller for their resistanc i es to be measured Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 7 2 Regulations 3 Regulations This device complies with the applicable EN requirements e Observe the following regulations and guidelines Local regulations and requirements of the electricity supplier concerned Commercial industrial codes and regulations and fire regulations Buderus 8 Logamatic SC20 Technical specifications are subject to change without prior notice Installation for heating technicians only 4 4 Installation for heating technicians only 4 1 Wall mounting the controller The controller is attached to the wall by three screws Caution Risk of injury and damage to the casing if incorrectly fitted N e Do not use the rear panel of the casing as a drilling template e Drill a hole in the wall and insert a wall plug Fig 4 item 1 Drive in a screw leaving the head proud by 5 mm Slacken the screw at the bottom of the controller and remove the cover Hang the controller on the wall by means of the slot in the rear p
10. anel Mark out the lower mounting holes gt Fig 4 item 2 drill the holes and insert wall plugs Straighten the controller and screw firmly in place through the lower mounting holes left and right pu oy bh 7747006071 05 1 SD Fig 4 Mounting the controller on a wall 1 Top fixing hole 2 Bottom fixing holes Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 9 EM Installation for heating technicians only 4 2 Electrical connections Danger Risk of death from electric shock e Before opening the device isolate the power supply 230 V AC e Secure the cable with the cable grip 4 2 1 Preparing cable entry The cables can either be fed into the housing from behind Fig 5 item 4 or from below gt Fig 5 item 3 e Maintain IP 20 protection when installing Cut open only the cable entries required Cut open the cable entry only as much as required e Use a knife to cut open the cable entry Fig 5 without leaving any jagged edges e Secure cables with the appropriate cable grips Fig 5 item 2 The strain relief clamp can also be fitted in the reverse position Fig 5 item 1 7747006071 02 1 SD Fig 5 Feeding in and securing cables 1 Cable grip reversed 2 Cable grip 3 Cable entry from below 4 Cable entry from the rear Buderus 10 Logamatic SC20 Technical specifications are subject to change without prior notice Installation f
11. ct ED 2 Details of the product 2 1 EU Declaration of Conformity The design and operation of this product conform to the applicable Euro pean directives and supplementary national requirements Confirmity has been demonstrated 2 2 Package contents Controller SC20 Collector temperature sensor NTC 20K FSK Storage cylinder temperature sensor NTC 10K Power cable Fixings and cable clamps for wall mounting If the controller is factory fitted into a solar pump ing station the cables will have been partly pre wired 7747006071 06 1 SD Fig 1 Controller SC20 with tempera ture sensors 2 3 Product description The controller is designed for use with a solar thermal system It can be wall mounted or factory fitted into a solar pumping station In normal operating mode the display screen on the controller stays illuminated in green yellow for pP on max DMF 5 minutes after the last button was pees acti MN In n vated by pressing the rotary selector _ for a example The display shows the following Lii Li LI Pump status as a simple schematic diagram System values e g temperatures Fig 2 Possible indications on the dis play Selected functions Fault messages Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 5 EN Details of the product Diagram of solar thermal system 7747006071 01 1 SD Fi
12. e on the pressure gauge Fig 7 when the system is cold about 20 C If pressure drops A pressure drop can be caused by the following There is a leak in the solar thermal circuit An automatic air vent has expelled air or vapour If the pressure of the solar thermal system has dropped e Check whether solar fluid has collected in the holding tank under the solar pumping station e Call in a qualified heating engineer if the system pressure drops 0 5 bar below the level recorded in the commissioning log Installation and servicing instructions for the solar station 8 5 Cleaning the collectors Danger Risk of death by falling from roof N e Inspection maintenance and cleaning work on the roof must only be carried out by qualified technicians Due to the self cleaning glass the collectors are washed every time it rains The collectors do not usually need cleaning Buderus 22 Logamatic SC20 Technical specifications are subject to change without prior notice sSe219A0 t Apno A u9A e pnoj Ap1ued z Ays 18e9J 2 1 suon IPUOD J9ujeoM User s log UM u An uenb 1eou 10 pue sinoy Buneiedo 299 WO Do ui nss id WId SAS 10q 1opurJA29 10 99 09 uon 19 043u02 e1s Buiduind ejos uo po Aejdsip soinjesodway uo oBneB ainssdid uonejs Buiduund sejos Youd Jooy ed 10199 02 peuoissiuuuloo eje njq uinja1 1eJosS P21 MOJJ 1eJOS uon e1s Buiduind 1ejos uo s1oj1euiouuou
13. er too cold or hot water flow rate too slow Domestic hot water thermostat on heating appliance on solar con troller or on thermostatic blending valve is set too low Storage cylinder temperature limit and thermostatic blending valve Set the cylinder temperature limit and hot water mixer to a lower set ting Set the temperature as instructed in the applicable operating manual max 60 C Temperature sensor T3 is not displayed as a symbol with a figure Double match flow DMF switched on Solar system can not be operated with DMF function Temperature sensor not incor rectly connected Temperature Sensor or Sensor lead defective Tab 6 Possible faults not indicated on the display Buderus Check sensor connections Check temperature sensor for breakage or incorrect fitted position Replace the temperature sensor Check the sensor cable 20 Logamatic SC20 Technical specifications are subject to change without prior notice Notes for the user E 8 Notes for the user 8 1 Why is regular maintenance important Your solar domestic hot water system or domestic hot water and space heating system is virtually maintenance free We recommend that you have your system serviced every 2 years by your local qualified heating technician In that way you can ensure smooth and efficient operation and early detection and elim ination of any possible damage 8 2 Important notes on solar fluids Warnin
14. g 3 System diagram Collector array Solar pumping station Solar system cylinder Controller SC20 A ON Main components of the solar thermal system Collector array Consists of flat plate collectors Solar pumping Consists of the pump together with safety valves and shut off valves for the station solar thermal circuit Storage cylinder Used for storing the collected solar energy There are three different types Domestic Hot Water DHW cylinder Thermal Store for space heating function Combination cylinder for DHW and space heating Controller SC20 Includes two temperature sensors Tab 1 Operating principle If the set temperature difference between the collector array Fig 3 item 1 and the storage cyl inder gt Fig 3 item 3 is exceeded the pump in the solar pumping station is switched on The pump transports the solar fluid through the collector array to the storage cylinder There is a heat exchanger storage cylinder This transfers the free heat collected from the sun and transfers the heat from the solar fluid to the water intended for washing or heating Buderus 6 Logamatic SC20 Technical specifications are subject to change without prior notice Details of the product ED 2 4 Specifications max Max current consumption at pump output 1 1 A connect one pump only Tab 2 Specifications Temperature sensor T1 NTC 20K collector Temperature sensor T2 T3 NTC 10
15. g Risk of injury from contact with solar fluid water and propylene glycol mix ture e lf solar fluid comes into contact with eyes hold eyelids wide open and thoroughly rinse eyes with running water e Keep solar fluid out of reach of children The solar fluid is biodegradable Your heating engineer has been instructed to ensure when commissioning the solar thermal system that the solar fluid provides protection against freezing at tempertures down to at least 25 C 8 3 Checking the solar thermal system You can contribute to the smooth functioning of your solar thermal system by doing the following Checking the temperature difference between flow and return and between the collector and cyl inder twice a year Checking the operating pressure for solar pumping stations Checking the heat quantity if a heat meter has been installed and or the operating hours can help qualified technicians when checking your solar thermal system and perform Enter the values in the log on page which may also be copied The completed log ing maintenance Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 21 EN Notes for the user 8 44 Checking operating pressure with possible re adjustment Pressure fluctuations in the solar thermal circuit due to temperature changes are nor mal and do not lead to faults in the solar thermal system e Check the system pressur
16. g temperature values In automatic mode you can use the rotary selector O to display various system values tempera ture values operating hours pump speed Temperature values are matched to their source by the location numbers on the pictogram 5 5 Service level menu for heating technicians only The Service level menu is used to set the controller to suit the specifics of the solar thermal system e To switch to the Service level menu simultaneously press the and buttons e Use the rotary selector O to select the desired setting or function e To change the setting press and hold the button and turn the rotary selector O to obtain the new setting e To save the new setting release the button e To exit the Service level menu press the button If no entry is made for more than 60 seconds the controller exits the Service level menu Setting range default cut in temperature difference When the set cut in temperature difference A T between the cyl 7 20 K C inder and the collector array is reached the pump cuts in If the 10 K C temperature difference drops below half the set figure the pump cuts out Cylinder maximum temperature When the temperature detected by the cylinder temperature sen 20 90 C sor reaches the maximum cylinder temperature the pump Is 60 C switched off Max flashes on the display and the temperature detected by the cylinder temperature sensor is displayed Pump speed
17. ications are subject to change without prior notice Safety instructions and explanation of symbols 3 1 Safety instructions and explanation of symbols 1 1 General safety instructions About this manual This manual contains important information for the safe and correct installation and operation of the solar thermal controller This manual is intended for both general users and qualified heating technicians Sections intended only for qualified heating engineers are marked with the words For heating technicians only e Read this manual carefully e Leave these instructions with the customer e Always observe the safety instructions to prevent injury and damage to property Intended use The differential temperature controller referred to from now on as the controller may only be used for the operation of solar thermal systems under the ambient conditions specified gt Section 2 4 The controller must not be used outdoors in damp rooms or in rooms where easily combustible gas mixtures could form e Only operate the solar thermal system as intended and when it is in proper working order Electrical connections Any work that requires the controller to be opened may only be carried out by a qualified electrician e The electrical supply must be connected by a qualified electrician e Make sure that a fused spur or other mains isolating device compliant with EN 60335 1 for dis connection from the power supply is fitted
18. or heating technicians only 4 4 2 2 Connecting the leads Observe the following when connecting the cables Comply with local regulations such as protective earthing tests etc Use only accessories supplied by Buderus Other makes possible upon request Protect the controller from overloads and short circuits The power supply must match the specifications on the rating plate Connect only 1 lead to each terminal max 1 5 mm The temperature sensor leads can be connected either way round The sensor leads can be up to 100 m long up to 50 m length 0 75 mm up to 100 m 1 5 mm Route all sensor leads separately from cables carrying 230 V or 400 V to avoid inductive inter ference minimum separation 100 mm Use shielded low voltage cables if external inductive interference is expected e g from power substations high voltage power cables microwaves For the 230 V connection use a cable of at least type HO5 VV NYM Ensure that structural fire safety features are not impaired e Connect the cables in accordance with the terminal diagram gt Fig 6 e Use a screwdriver to open and close the quick connect terminals e After completing the work close the controller by replacing the cover and the securing screw 7747006071 03 1 SD Fig 6 Terminal diagram 1 Fuse 1 6 A slow blow Temperature sensor T3 for displaying temperature in storage cylinder middle top acces
19. r or sensor Replace the temperature sen lead defective sor Check the sensor cable Temperature difference between temperature sensors T1 and T2 is too great No flow of fluid Air in the system Vent the system Pump is stalled Check the pump Valves or shut offs are closed Check valves and shut offs Blocked line Check line Collector connections mixed up The collector connections Check the flow and return return flow may be mixed pipes up Tab 5 Possible faults indicated on the display Sensor faults are not displayed once the cause is eliminated e For other faults press the button to switch off the fault display Buderus 18 Logamatic SC20 Technical specifications are subject to change without prior notice Faults 7 2 Faults not indicated on the display Type of fault LONEENL L NNNNL NN Display is blank Pump not running although activation conditions are met The solar storage cylinder is No power supply fuse or power Check fuse and replace if necessary not being supplied by the cable faulty Have electrical system checked by solar thermal system an electrician Pump not running although activation conditions are met The solar storage cylinder is Pump switched off in manual Use the manual mode function to not being supplied by the mode switch to automatic solar thermal system v Storage cylinder temperature T2 When the temperature drops is close to or above the set maxi 3 K
20. re gauge displays the operating pressure 7747004985 09 1 SD Fig 7 Solar pumping station 1 Display of temperature for solar return 2 Pressure gauge 3 Display of temperature for solar flow Buderus 12 Logamatic SC20 Technical specifications are subject to change without prior notice Operation EM 5 2 Elements of the controller 7747006071 04 1 SD Fig 8 controller and display Display Rotary selector Back button OK button Symbol for temperature sensor Displays of temperatures hours of operation etc Indication for Cylinder maximum temperature reached Animated solar pumping circuit Indication for Collector minimum maximum temperature reached SOoOonN oO RAN 5 3 Operating modes Automatic mode When the activation temperature difference between the two temperature sensors Is exceeded the connected pump starts running The transport of the solar fluid is shown by the animation on the display Fig 8 item 8 When the cut out temperature difference is reached half of the cut in temperature difference the pump is switched off To protect the pump it is automatically switched on for about 3 seconds after approximately 24 hours of inactivity Function test manual mode This operating mode is only accessible from the Service level menu for heating technicians Buderus Logamatic SC20 Technical specifications are subject to change without prior notice 13 EN Operation 5 4 Displayin
21. t settings All functions and parameters are reset to their default settings except for operating hours After resetting all parameters should be checked and adjusted if required Tab 4 Service level functions e To store the maximum amount of free energy from the sun fit a thermostatic blend ing valve immediately after the DHW cylinder and increase the controller maximum storage cylinder temperature Further thermostatic blending valves should be used to limit the DHW where it is used for washing and bathing Warning Risk of scalding from high domestic hot water temperatures Buderus 16 Logamatic SC20 Technical specifications are subject to change without prior notice Commissioning for heating technicians only EM 6 Commissioning for heating technicians only Warning Risk of damage to pump if run dry N e Make sure that the solar thermal system is filled with solar fluid installation and maintenance instructions for solar pumping station e Follow the instructions in the technical documentation for the solar pumping station the collec tors and the storage cylinder when commissioning the solar thermal system e Only put the solar thermal system into operation when all pumps and valves are in proper working order Warning System damage when commissioning due to vaporisation in the solar ther mal circuit e Shield the collectors from direct sunlight during commissioning suitable covers are available from
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