Installation and user manual DEVIreg™ 850 controller GB
Contents
1. 850 18 26 VDC 180 250 VAC 50 60 Hz Max 3 W Max 8W each Max 13W each 230V 2A 230V 15A 230V 15A 1A power factor 0 3 10 C to 40 C 50 C to 70 C 30 C to 70 C DEVIbus connected moisture sensor s 2 x 16 character illuminated display Alarm light red Lit info key yellow Depth x Height x Width 53 mm x 86 mm x 105 mm 15 mm x 23 5 mm x 216 mm D 87 mm height 74 mm D 93 mm height 98 mm D850 DP 10 For further information on the sensors please refer to the sensor manual 25 Technical Specifications Factory settings Roof System moisture Cod fon OM ooo System mode Automatic e Automatic e Constant ON manual timer e Manually OFF Ground system Moisture level 50 5 to 95 5 being the most sensitive to moisture 3 Standby temperature 20 C to 0 C Melting temperature 4 0 C 1 0 C to 9 9 C System mode Automatic e Automatic e Constant ON manual timer e Manually OFF 26 Appendix A A Menu system Main menu System menu Only visible when System B is installed A Roof B Ground 55 jo 5s RH Roof B Ground ES 25 Landby 5s P eMelting Select sustem FR View and set Roof operating mode O System A View sensor measurements Select sustem B View and set Ground gt operating mode gt Syst2. Cancel replace sensor is selected If the user selected a new sensor to add the replacing of the sensors is performed Add an extra sensor V From the installer menu select Change system The system is searching for connected sensors VP Press to loop through the found passive sen sors or to cancel replace sensor e Press when the correct new sensor to add is found or Cancel add sensor is selected UJ Installer Manual Add an extra sensor VP From the installer menu select Change system The system is searching for connected sensors VP Press to loop through the found passive sen sors or to cancel replace sensor e Press Ca when the correct new sensor to add is found or Cancel add sensor is selected If the user selected a new sensor to add the sensor is added 24 Technical Specifications Technical data Voltage e DEVIreg 850 e Power supply Power consumption e DEVIreg 850 e Roof sensor s e Ground sensor s Relay load capability Resistive load Alarm realy Resistive load System A relay Resistive load System B relay Inductive load each realy IP class e DEVIreg 850 e Roof sensor s e Ground sensor s Ambient temperature DEVIreg 850 e Roof sensor s e Ground sensor s Sensor type Indication Measurements e DEVIreg 850 e Roof sensor s e Ground sensor s Tube ground sensor s Type DEVIreg
3. a 5 44045 64546944 2444044 CR OG SEES ROE DES 22 Replacing a malfunctioning sensor 23 Add an extra sensor asu 2844064840050 OEDD RD Ow 24 3 Technical Specifications Techical dld s 2 993 9 95 O kuy x WO oR WQ p k EDN NYD ANAN 25 Faclo S OU IG coup ae eet a 3 ONN FARF eee DT 26 4 Appendix A Menu Syste CC 27 DOW It WOIKS au wes a xxr ae eee ee oe X zo wo HAN Sp oa 9 EORR 32 ROO LAC PUMP E E Y Goh an Ge ke AG WN AG UT 32 Ground system 53 5 ee ado a WR RR EU eae Oe ee dy TS EAT ee Bara 33 Security and energy consumption 35 C PSU and feeder cable aa su Xe eee oh ee Be RON YR nn AUD VOR OG GO ur 36 Ground system ML 36 ROOT NIC RENE S E Y T Ye ANG MGA he eae RR oe Shee W Q NW 36 User Manual System overview The DEVIreg 850 system is capable of keeping outdoor areas free of ice and snow The DEVIreg 850 can handle up to 2 independent areas in any of the following combinations Single roof system To keep gutters valley gutters and down pipes free of ice and snow and to prevent icicles from causing damage It is also possible to use the roof system to reduce remove the snow weight from a roof Roof system A e Single ground system To keep areas like parking areas paths garage en trances steps ramps roadways and bridges free of ice and snow Ground systems A 1 ground system and 1 roof system combi system Consists of 1 single roof system A and 1 s
4. Jo E i Cancel Add E Cancel rerlace i I sensor t sensor i E U E i i Sensor added Add sensor I E ID B3ABC1 I I I I AA 23 jo o I I I I Q Add sensor Y ID BSDEF 1 I I I Jo o I Cancel rerlace I sensor i i I I I I I I I I I I I I I L 30 Appendix A View statistic View statistics OFerating time e Euannina time e Relay operations 146828 View connected Sensorl A41153 Sensors Errors El Sensor H4115C Errors EB jo Leave this menu Press O 9 Boot Fu version aza BS 83 81 Main Fh version BATT BE 81 81 Text version 1611 83 61 61 E PROM version A111 BZ 41 81 lo Leave this menu Press O 31 Appendix B B How it works Roof system The roof system is fully automated It gathers information on moisture and temperature via digital sen sors continuously The sensors are placed on strategic spots in gutters or down pipes for further informa tion on the sensor please refer to the sensor manual By combining ost heating time elapsed measurements of both moisture and temperature a reliable detection of the situation is achieved Hence it is known whether heating of the roof area is needed in order to avoid that the roof is covered by
5. 4 Connect the power supply to mains Installer Manual DEVIbus sensors RS232 DC meu DC p CU papa Jpspanspehznsne opzpozpsp DC PSU 24V 24W DEVIreg 850 PSU 24V NA Lo EC mii 220 240V 50 60 Hz ALARM SystemA System B The DEVIreg 850 has an integral alarm function that monitors the attached sensors and the in built microprocessor An external alarm may also be connected to the system Installer Manual B 230V 1 3 P 1 3 loads System A Devireg 850 A d a4 d D3r D03 unsucdau mm 230 V cables p e e e e n o uro n EU CH CI pepe EI se pope je Ki 1x n C 230V 1 3 P 1 3 loads System B s 00 1 n m mo je e Devireg 850 pepe ps AES erm e eem TAPER m T I LYN e I i i I tp K1 1 x In YA I I I I I I r rh FI rij Lj Lj LJ LJ I i I I I I i i I Mo a 230 V cables Installer Manual D 400 V 2 3 Phase 1 3 Loads System A E 400V 2 3 Phase 1 3 Loads System B p 28 s e 0 e 19 20 21 22 29 2 1s 18 15 16 17 x8 1 20 27 o o Devireg 850 Devireg 850 BE EL ew ow He pepe Ll E peperere pe pope pe L2 ET TE MIS CS lap sa VA s AR AN FYN SAW a eon Leer bg CD33 400 V cables 400 V cables
6. F Direct connection System A G Direct connection System B s8 18 s ie o o o o n on fas e 8a se e 7 o 20 o far e Devireg 850 Devireg 850 max 15A 230 V cables 230 V cables 14 Installer Manual Installation steps for system systems The installation of the DEVIreg 850 is very easy and the user is guided through the installation process The installation process differs a little depending on which kind and the number of systems to be installed Please follow the general description and finally select the installation scenario accord ing to the system type Change setting with key O Accept setting with key General V9 Power on DEVIreg 850 amp Select language System is being checked amp Select system configuration e Roof system 1 system e Ground system 1 system e Combi system 2 systems e Dual system 2 systems The rest of the installation is divided into the system configurations roof ground combi or dual as listed above Installer Manual Installation of roof system The installation of a DEVIreg 850 with 1 roof system has been selected It is optional if the sensors are connected to the DEVIreg 850 before power on or dur ing the installation The system uses the output System A If sensors for System A are not connected do it now VP Press o or wait System is being scanned to find type of connected se
7. PSU 2 pcs PSU 24VDC 24 VDC 24 W 24 W in parallel Ground system 4 mm if 2 sensors are used in a dual zone system ie 1 sensor in each zone 2 PSUs are required Roof System 1 pcs PSU 2 pcs PSU 24VDC 24 VDC 24W 24 W in parallel of sensors Max length Max length Max length Cable type Max length m 2 4 200 33 0 5 50 00 52 36 37 The DEVI Guarantee You have purchased a DEVI heating system which we are sure will serve to improve the comfort and economy of your home DEVI provides a complete heating solution with DEVIflex heating cables or DEVImat heating mats DEVIreg thermostats and DEVlfast fixing strips Should you against all expectations experience a problem with your DEVI heating system you will find that DEVI whose products are manufactured in Denmark and sold throughout the European Union is subject to the standard regulations pertaining to product liability as specified in EU directive 85 374 CEE as well as all applicable legislation in the individual countries on the following conditions DEVI offers a 10 year guarantee on all DEVIflex heating cables and DEVImat heating mats and a 2 year guarantee against material defects and production defects in connection with any other DEVI products The guarantee shall be valid only if the GUARANTEE CERTIFICATE is completed correctly and in accordance with the instructions and provided the fault is in
8. is detected Moisture level The moisture level decides when the system detects moist The factory setting is 50 on a scale from 5 to 95 The lower the setting the more sensi tive the system is to moisture I Post heat Once the sensor has detected that the roof gutter is dry and free of ice and snow the system will keep heating for another hour default If you wish to increase decrease this time see appendix A Installer menu The factory setting is 1 hour on a scale from 0 to 9 hours Priority When using the DEVIreg 850 as a dual or combi system it is possible to prioritize the systems When the priority of 2 systems is equal both systems can heat at the same time If the priority of the 2 systems differs and both systems want to heat only the system with the highest priority is allowed to heat The factory setting is 1 highest priority for all systems Clogged drain It is possible to enable and disable the Clogged drain warning The factory setting is Warning On System and sensor name It is possible to change the names of the system and connected sensors see appendix A Installer menu 8 User Manual Ground system Melting temperature Changing the melting temperature will affect when the system is activated in case of moisture and low temperatures The factory setting is 4 C This means that the heating system will be activated if the temperature falls below 4 C and moisture is dete
9. Installation and user manual DEVIreg 850 controller N DEVI Member of the Danfoss Group A Table of Contents 1 User Manual System overview n Rex ob YF EU eee HG 30949 UU u n ee EW bn 3 General use x 6 a o9 ep moy ge XA e UR NOUS CK HR qo ae KU RU NOR E Y b d 5 jio enn k aoe eee oe eee W S eee eee toe ee a eee ee ee 5 Mec ch wee s w Le ee w Q wp S W S ee ee p w w QUE sb w eee 5 Menusystem esa a s asas as esa sasana nis nas cas eee 10 6 Possible alarms during operation Cloggeddrain 7 WIESSINGSCNSOls s Ae ee ee eee ee ee he AA 7 New sensor added GG GG 0a aaa 7 Sensor malfunction 7 Changing parameters and performance of systems 8 ROO SYSTEMI aa scan Go d AE 8 Ground system 64 4465 naa ak MAA ees Dara Ge Be Oa IO O R N 9 2 Installer Manual System OVEIVIEW o issa k u Siwas BAD Re AR W QQ RD wS s SESE EB a 10 PIGCCMICNG cayo uyaq AA YR 11 Connection stepsforsystem 11 Installation steps for system systems 15 General T _c Z XO o UO RUE CURE RR eee ae eee d E 15 Installation of roof system eee 16 Installation of ground system 17 Installation of combisystem 18 Installation of dual system 20 Modification of system s
10. M This icon is shown when the system has detected snow or ice and the tem perature is below the melting temperature The DEVIreg 850 can simultaneously control up to 2 different systems These 2 sys tems are referred to as System A and System B The DEVIreg 850 gives the user the opportunity to view the current status of the systems The status can be shown in 2 different ways User Manual Combined view default The combined view shows the status of both systems at the same time System A is shown on the upper display line and System B is shown on the lower display line This view gives the user a quick overview of all the systems Flipped view The flipped view shows the status of 1 system at a time The status of each system is shown for 5 seconds This view gives the user more detailed information about each system The user can always press to get more information about the current status irrespective of view selected Menu system The menu system is navigated by the keys O and No matter if the DEVIreg 850 controls one o or two systems the look and use of the 9 5s menu system is always the same This is ob CI ss tained by making the entry to each system in Kc the main menu The possibilities and settings I5 System for each system are first accessible after the o o Vieu sensor E
11. See other conditions on previous page Electrical Installation by Installation date Type of thermostat Production code Suppliers Stamp DEVI A S DK 7100 Vejle Phone 45 76 42 47 00 Fax 45 76 42 47 03 39 Article 08095387 mMm o N o CN e st z gt lt Y gt
12. cted Standby temperature maintained ground temperature The higher the standby temperature the faster the system will be able to melt ice and snow On the other hand the higher the standby temperature the higher the running costs So determining the standby temperature is a trade off between fast melting or low running costs The factory setting is 3 C Moisture level The moisture level decides when the system detects moist The factory setting is 50 on a scale from 5 to 95 The lower the setting the more sensi tive the system is to moisture Post heat Once the sensor has detected that the roof gutter is dry and free of ice and snow the system will keep heating for another hour default If you wish to increase decrease this time see appendix A Installer menu The factory setting is 1 hour on a scale from 0 to 9 hours Priority When using the DEVIreg 850 as a dual or combi system it is possible to prioritize the systems When the priority of 2 systems is equal both systems can heat at the same time If the priority of the 2 systems differs and both systems want to heat only the system with the highest priority is allowed to heat The factory setting is 1 highest priority for all systems Clogged drain It is possible to enable and disable the Clogged drain warning The factory setting is Warning On System and sensor name It is possible to change the names of the system and connected sensors Ins
13. d Connect sensors for System B VP Press o or wait System is being scanned to find type of connected sensors V Select system type h Wait until correct number of sensors for System B is found 20 Installer Manual VP Press o when all sensors for System B are found System B is installed System is being checked VP Press to select system to configure VP Press o to configure selected system naming sen sors changing factory settings and setting priorities Please refer to Changing parameters and performance of systems in User Manual for description of the configurable parameters amp Press to end configuration N Installer Manual Modification of system s It is possible to modify the installed systems on the DEVIreg 850 The following modi fications are possible Reactivate passive sensors Replace a malfunctioning sensor Add an extra sensor When the DEVIreg 850 cannot communicate with a sensor the DEVIreg 850 reports the error Errors detected The DEVIreg 850 does not rely on malfunctioning sen sors and therefore the DEVIreg 850 makes the sensor passive The passive sensor is no longer used for ice and snow detection not even after a power cycle A If the malfunctioning is caused by problems with the wiring the failure can be fixed and the sensor can be reactivated A If the malfunctioning is caused by an erro
14. em B View sensor measurements View alarm menu je System menu A B View and set oFeraLing mode A Current mode Automatic jo Select mode Automat ic jo Select mode Constant OFF D Select mode Constant OH G E E c x 2 o Leave this menu Press n Y View sensor measurements D View sustem FaraneLers jo Installer site KN Miew sensor measurements Kb View sustem parameters jo Proceed 7 nnn Yen No eee Installer menu Leave this menu Press O 27 Appendix A View sensor measurements View sensor measurements Roof systems Sensor 1 Teme 26 170 View system parameters Roof system lieu parameter Moist lew SH jo Sensor surfacwe Teme 27 2 jo View parameter Melt T 4 RC jo Sensor 1 Moist lew 16 jo jo View parameter Postheat iH C Sensor 2 Teme 26 2 C jo jo lieu parameter Priority 1 jo Sensor surface Teme 27 3 C jo Leave this menu Press O Sensor 2 Moist lew 11 jo Leave this menu Press O View se
15. his is done in order to obtain a correct measurement of area temperature which is not influenced by sensor temperature If a system only has one sensor this sensor is constantly heated for 90 minutes and then turned off for 90 minutes This entails that measurement of temperature can be up to 3 hours delayed With more than one sensor this performance is significantly improved 34 Appendix B Security and energy consumption High security higher energy consumption If a high degree of security against ice and snow is wanted make the following adjust ments of the operation parameters Increase the standby temperature Increase the melting temperature e Decrease the moisture level close to setting 5 Prolong the post heat period This will give a high degree of security in even dry areas Low security lower energy consumption Conversely low energy consumption and a moderate level of security against ice and snow could be prioritized In this case make the following adjustments of the operation parameters e Decrease the standby temperature e Decrease the melting temperature Increase the moisture level Shorten the post heat period This will give relatively low energy consumption but the area may remain wet and icy in short periods The factory settings are average values providing a relatively high degree of secu rity and moderate energy consumption 35 Appendix C C PSU and feeder cable 1 pcs
16. ice and snow Standby No heating Temperature gt Temperature lt Melting temperature Melting temperature and Moisture gt Moisture limit Melting Heating Moisture lt Moisture limit After 3 hours Measuring tem perature 0 20 minutes No heating Standby The system is on standby and awaits heating of the roof area Heating of the roof area will start when the following conditions are fulfilled e Measured moisture is higher than the chosen limit for moisture Measured temperature is lower than the chosen melting temperature Temperature and moisture are measured continuously by the sensors Melting ice and snow The roof area is heated in periods of 3 hours Within that period a decrease in mois ture will stop the heating and activate post heating The post heating function can be disabled Measuring temperature The heating function is suspended every third hour meaning that the heating cables are turned off This is done in order to allow the sensors to measure the temperature without being influenced by the heated cables The temperature measurement may last up to 20 minutes If the measured temperature is higher than the chosen melting temperature the heating period is ended if not heating of the roof area is resumed after the temperature measurement Post heating If the reason for ending a heating period is a decrease of moisture to below the chosen level the post heating period
17. ingle ground system B 2 roof systems dual system Consists of 2 x Single roof systems A and B e 2 ground systems dual system Consists of 2 x Single ground systems A and B User Manual When more than 1 area is controlled by the DEVIreg 850 system it is also possible to prioritize the areas Prioritizing makes it possible to operate 2 areas even if the needed power for 2 areas is not present The DEVIreg 850 is fully automatic and operated digitally by means of the intel ligent sensors located in the heated terrain Each sensor measures both temperature and moisture and the system turns the heating elements on and off based on these readings By combining moisture and temperature readings the system is able to save around 7596 energy compared to systems which only measure temperature readings The digital sensors used for the DEVIreg 850 also provide the most exact readings when compared with corresponding analogue systems The result is optimum func tionality and low energy consumption A typical installation consists of e Controller unit only one This is the DEVIce which based on the measure ments from the sensors decides when to heat the connected area s e Power supply one or more The power supply delivers power to the controller unit and the connected sensors e Ground sensor one or more At least 1 ground sensor is needed for each ground area but to get the best performa
18. me reason you do not wish to configure the system now you can press t skip configuration of system amp Press to end configuration O Installer Manual Installation of combi system The installation of a DEVIreg 850 with 1 roof and 1 ground system has been selected It is optional if the sensors are connected to the DEVIreg 850 before power on or dur ing the installation A The first installed system System A is using the output System A The second installed system System B is using the output System B It is freely selectable if System A should be the roof or ground system However it is preferable that System A is the roof system since System A is shown on the upper line of the display Please refer to the description of the Display and Combined view in the user manual If sensors for System A are not connected do it now VP Press Or wait System is being scanned to find type of connected sensors amp Select system type Roof if roof system is preferred as System A h Wait until correct number of sensors for System A is found amp Press Ce when all sensors are found System A is installed If sensors for System B are not connected do it now amp Press or wait System is being scanned to find type of connected sensors amp Wait until correct number of sensors for System B is found VP Press o when all sensors for System B are found 18 Installer Man
19. name sensors Sensor 2 Leave this menu Y Change system jo statistics jo Restore factory Farameters Set rarameter Language English f lo Leave this menu Press n Press O m Change system View statistics Select language Enter name AM Enter name t ret Enter name Sensor 1 sen NEhiLer name Sensor z Appendix A Change system Change system Checking system gt I aa Only if any passive disabled reactivated sensors are working again L i i If no new sensor s found Example showing ground If new sensor s found but no passive sensor s found If new sensor s found and passive sensor s found y Sensor rerlaced I I I I i i i I Nag BI I I i I 1 I system I 1 lI Ho around Add sensor i Rerlace sensor i I sensors found I ID BSABC1 t Sensori B3FB2F I I I I I I fae LS 4 Jo oy I I Q Add sensor Y l Q Replace sensor M l I ID BSDEF 1 Fog Sensor B3FC24 I I I I I I
20. nce of a system 2 or more sensors are recommended For more information please refer to the sensor manual e Roof sensor one or more At least 1 roof sensor is needed for each roof area but for complex roof constructions 2 or more sensors are recommended For more information please refer to the sensor manual For more information about the ice and snow melting function of the DEVIreg 850 please refer to Appendix B How it works 4 User Manual General use The DEVIreg 850 is operated via 3 buttons and an alpha numeric display capable of displaying information in various languages Buttons The functions of the 3 buttons are Info Shows additional information help Only active when lit O Next Next menu entry next line next letter Enter Confirm select Besides the normal function of the buttons some special combinations are important to the user Return to home of menu system Hold o for 2 seconds Master reset Restore factory defaults AND delete installed systems In case of insolv able problems due to a wrong choice of Hold for 8 seconds language etc Display The following icons have a special meaning This animated icon is shown when the system is heating When the icon is blinking the system wants to heat but is paused system has low priority 4 This icon is shown when the system has detected moisture and the tempera ture is above the melting temperature
21. nsor parameters 28 View sensor measurements Ground system je Sensor 1 Teme 286 17C jo Sensor 1 Moist ley 18 e Sensor 2 Teme 26 2 C jo Sensor 2 Moist lew 11 jo Leave this menu Press O View system parameters Ground system je View parameter Moist ley 5A e Wiew parameter Stdb T 3 8 C e View parameter Melt T 4 8 C e View Parameter Postheat 1H e View Parameter Priority 1 e Leave this menu Press O Appendix A Installer menu Installer menu Set parameter Moist lew S jo Set rFarameter Stdb T 3 8 C jo Set parameter Melt T 4 E L jo Set parameter Postheat ih jo Set Parameter Priority 1 jo Clogged drain Warning Um lo Rename system Roof Y Rename sensors in sustem Enter Moist lew teb temp Enter Melt temr 1 8 EIE Enter rFostheat B hours Enter Priority 1 cHish Select a Warning On lt A Enter name Ents jo Ewer name v ret Rename sensors Sensor 1 jo Re
22. nsors V Select system type Roof h Wait until correct number of sensors for System A is found amp Press when all sensors are found System A is installed System is being checked ET Press to configure System A naming sensors and changing factory settings Please refer to Changing parameters and performance of systems in User Manual for description of the configurable parameters If for some reason you do not wish to configure the system now you can press t skip configuration of system O amp Press to end configuration 16 Installer Manual Installation of ground system The installation of a DEVIreg 850 with 1 ground system has been selected It is optional if the sensors are connected to the DEVIreg 850 before power on or dur ing the installation The system uses the output System A If sensors for System A are not connected do it now VP Press o or wait System is being scanned to find type of connected sensors V Select system type Ground h Wait until correct number of sensors for System A is found amp Press when all sensors are found System A is installed System is being checked VP Press to configure System A naming sensors and changing factory settings Please refer to Changing parameters and performance of systems in User Manual for description of the configurable parameters If for so
23. r prone sensor the error can be cor rected by replacing the error prone sensor with a new sensor It is not possible to delete a passive sensor in a system Passive sensors will remain in the systems until they are replaced with new sensors The only way to delete a passive sensor other than replacing it is to make a Master Reset and reinstall the DEVIreg 850 please refer to chapter General use Reactivate passive sensors The given example is for a ground system V From the installer menu select Change system Press to activate Change system The system is searching for connected sensors If any passive sensors are found they are reactivated Message is shown for 3 seconds If no new sensors are found it is reported to the user Message is shown for 3 seconds 22 Installer Manual Replacing a malfunctioning sensor VP From the installer menu select Change system The system is searching for connected sensors The user selects the passive sensor which should be replaced with a new one VP Press to loop through the found passive sen sors or to cancel replace sensor VP Press when the correct passive sensor or Cancel replace sensor is selected If the user selected a passive sensor to replace the user should now select the new sensor amp Press to loop through the found new sensors or to cancel replace sensor VP Press when the correct new sensor to add is found or
24. r to get a replacement New sensor added Description When a new sensor is added the DEVIreg 850 alarms the user and at the same time automatically switches to Constant Off mode User interaction is needed in order to correct the error Solution Acknowledge error and go to Installer Site in the menu system and select Change System Sensor malfunction Description When something is wrong with the readings from connected sen sors to the DEVIreg 850 an alarm is raised Not all error prone sensors can be discovered using this fea ture Solution Acknowledge error and go to Installer Site in the menu system and select Change System Contact your local service centre to get a replacement User Manual Changing parameters and performance of systems Several parameters for each system can be changed during and after the installation For a complete understanding of how these parameters affect the performance of the roof and ground system please refer to Appendix B How it works A Only change the DEVIreg 850 parameters if you are aware of the effects of your actions Reference Appendix A Installer menu Roof system Melting temperature Changing the melting temperature will affect when the system is activated in case of moisture and low temperatures The factory setting is 1 5 C This means that the heating system will be activated if the temperature falls below 1 5 C and moisture
25. spected by or submitted to DEVI or an authorised DEVI dealer Please note that the GUARANTEE CERTIFICATE must be completed in English or local language DEVI shall undertake any repair free of charge or supply the customer with a new unit Repairs shall be carried out at no further cost to the customer In the case of faulty DEVIreg thermostats DEVI reserves the right to repair the unit free of charge and without any unrea sonable delays for the customer The DEVI Guarantee shall not cover installations that have been carried out by non authorised electricians faults which arise as a result of misuse by other suppliers damage caused by third parties incorrect installations or conse quential damage All work will be invoiced in full if DEVI is required to inspect or repair faults that have arisen as a result of any of the above The DEVI Guarantee shall not extend to equipment which has not been paid in full DEVI will at all times provide a rapid effective and honest response to all queries and reasonable demands from our customers The above guarantee covers product liability only while purchases are subject to national legislation The DEVI Guarantee Guarantee Certificate The DEVI Guarantee is granted to Name Address Postal code Phone Please observe In order to obtain the DEVI Guarantee the following must be carefully filled in
26. taller Manual System overview The DEVIreg 850 can handle up to 2 independent areas in any of the following combinations Single roof system 1 system 1 4 roof sensors Single ground system 1 system 1 4 roof sensors e 1 ground system and 1 roof system combi system 2 systems 2 4 sensors total minimum 1 sensor per system 2 roof systems dual system 2 systems 2 4 sensors total minimum 1 sensor per system e 2 ground systems dual system 2 systems 2 4 sensors total minimum 1 sensor per system When more than 1 area is controlled by the DEVIreg 850 system it is also possible to prioritize the areas Prioritizing makes it possible to operate 2 areas even if the needed power for 2 areas is not present A typical ice and snow melting system consists of DEVIreg 850 e Only 1 DEVIreg 850 is allowed on the DEVIbus Power supply o More power supplies can be connected in parallel if needed o Be aware of maximum number of sensors on each power supply Refer to Technical Specification for power demand of sensors Ground and or roof sensor s o Be aware of maximum number and cable length of sensors on each power supply Refer to sensor manual for a more detailed description 10 Installer Manual Placement The DEVIreg 850 and power supply are designed for DIN rail mounting When mount ing please be aware of the following conditions The DEVIreg 850 is designed and approved to opera
27. te in the temperature range 10 C to 40 C A The DEVIreg 850 is only IP20 protected thus not water resistant A The installer must ensure proper enclosure of the DEVIreg 850 according to national standards electrical safety Connection steps for system A Only authorized personnel is allowed to install the DEVIreg 850 When wiring up the DEVIreg 850 and sensors please be aware of the following conditions When the DEVIreg 850 is used in a dual system configuration it is prefer able that each sensor bus DEVIbus can be connected and disconnected via switches During the installation of a dual system each system must be con nected one at a time dA Be aware of maximum allowable power drain from power supply to sensors Below is shown the recommended order of the installation Please refer to figure A for connection of DEVIreg 850 and refer to figure B G for a guideline to connect the heat ing elements to DEVIreg 850 1 Connect heating cables to the DEVIreg 850 Please notice that a single system ALWAYS uses the System A output relay e When using external power relay please refer to the connection diagrams 2 Connect the power supply to the DEVIreg 850 Do not connect the power supply to mains yet 3 Connect sensors to the DEVIbus e When used as a dual system only the sensors for System A can be connected For connection of System B please refer to chapter Installation of dual system
28. ual VP Press o when all sensors for System B are found System B is installed System is being checked VP Press to select system to configure VP Press o to configure selected system naming sen sors changing factory settings and setting priorities Please refer to Changing parameters and performance of systems in User Manual for description of the configurable parameters amp Press to end configuration Installer Manual Installation of dual system The installation of a DEVIreg 850 with 2 roof systems or 2 ground systems has been selected It is mandatory that no sensors or only sensors for System A are connected to the the DEVIreg 850 before power up Sensors for System B must be connected to the DEVIreg 850 during the installation steps Connection of the sensors during instal lation can either be done using a switch on the DIN rail or just connect sensor bus of System B to the already connected sensor bus of System A The first installed system System A is using the output System A The second installed system System B is using the output System B If sensors for System A are not connected do it now VP Press or wait System is being scanned to find type of connected sensors amp Select system type Ground h Wait until correct number of sensors for System A is found VP Press Q when all sensors for System A are found System A is installe
29. user has selected the desired system j R To the right is given an example of the main le aga menu and the menus for System A and 5 pessurenerts System B Only visible when System B is installed View alarm menu Please note that only a few of the menus for each system are shown For a complete overview of the menu system please refer to Appendix A Menu system User Manual Possible alarms during operation Clogged drain Description When clogged drain warning has been enabled an alarm is raised when the system constantly has been detecting moisture for 14 days If the DEVIreg 850 controls more than 1 system and prioritiz ing has been enabled the time before clogged drain warning for the down prioritized system can be much longer The time is only updated when the system actually is allowed to heat the area e g the up prioritized system is not heating Solution Check gutter and down pipes for any obstacles preventing the melting water to flow away Check if sensors are covered with dirt Missing sensor Description When the connection to a sensor is lost the DEVIreg 850 alarms the user At the same time the DEVIreg 850 automatically switch es the system to Constant Off mode and user interaction with the DEVIreg 850 is needed Solution Acknowledge error and go to Installer Site in the menu system and select Change System Contact your local installe
30. will start Post heating ensures that no ice and snow is left on the roof 32 Appendix B Ground system Temperature lt Standby temperature The ground system is fully automated It gathers information on moisture and temperature via digital sensors continuously The sensors are placed on stra BEEN tegic spots on the ground area for further information on the sensor please refer to the sensor manual By combining measurements of both moisture and temperature a reliable detection of the situation is achieved Hence it is known whether heating of the ground area is needed in order to avoid that the ground area is covered by ice and snow Temperature Standby ag Standby temperature Mantaining standby temperature Heating Standby No heating Temperature lt Melting temperature and Moisture 5 Moisture limit Melting Heating Temperature 5 Melting temperature 1 5 C Poat heat time elapsed Standby The system is on standby awaiting need for heating If the measured temperature is below the chosen standby temperature the system will automatically heat the area in order to maintain the standby temperature Melting heating will start when the two following conditions are fulfilled e Measured moisture is higher than the chosen limit for moisture Measured temperature is lower than the chosen melting temperature Temperature and moisture are measured continuously b
31. y the sensors Melting Ice and snow As long as the measured temperature is lower than the chosen melting temperature heating of the ground area will be on When the measured temperature reaches the chosen melting temperature and the measured moisture level is below the chosen limit the post heating function will be activated The post heating function can be disabled If moisture is detected on the ground area the system will continue to heat the area in order to maintain the melting temperature It is however important to understand that even when the system is melting ice and snow it is not necessarily heating at all times The heating will be turned on and off in accordance with the measured tempera ture in order to maintain a constant melting temperature If the temperature rises more than 1 5 C above the chosen melting temperature the system will automatically stop heating the area irrespective of the moisture on the area 33 Appendix B Post heating If the reason for ending a heating period is a decrease of moisture to below the chosen level the post heating period will start Post heating ensures that no ice and snow is left on the roof A If system priority is low heating might be paused at any time AN The ground system uses heated sensors which under normal circumstances will hold a temperature of 1 5 C In connection with measuring the area temperature heating of the sensor is turned off for 90 minutes at a time T
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