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GX850M Manual

1. Er PF t t y Rename sensors Rename sensor Enter name in sustem Sensori gt sensori y o Rename sensor Enter name Sensor Sensor 9 o Leave this mend Press H y Change sustem Change system 19 View e AH cc dede m gt View statistics 19 Restore factory Parameters 19 Sel Parameler e Select language Language English A Gem IJ y Select temr Select temm EU indication bal indication 9 Leave this menu Press D 29 Appendix A Change system Change system Y Checking sustem 1 sensor s Only if any passivddisabled 1 1 reactivated sensors are working again I 1 If new senso s found but no If new senso s found and 1 Example showing ground i passive sensds found passive sensd6 found system i Ho ground Add sensor Rerlace sensor sensors found r ID BSABC1 Sensori B3FB2F 1 L 9 o e Hdd sensor Y Rerlace sensor M ID B3DEF1 o Sensor2 M3FC24 9 Cancel add 9 Cancel replace 9 sensor sensor Sensor added Add sensor ID AZAEC1 Q y o Add sensor Y ID B3DEF1 yO Cancel replace sensor Sensor replaced 30 Appendix A View statistic View statistics y Orerating time 3682h Running Lime 2479h
2. W x 3 D Mounting Wall mounted Indoors Ambient temperature e GX 850M 14 F 10 C to 104 F 40 C e Roof sensor s 58 F 50 C to 158 F 70 C e Ground sensor s 22 F 30 C to 1589F 70 C Indication 2 x 16 character illuminated display Alarm light red Lit info key yellow Measurements Depth x Height x Width e GX 850M without enclosure 2 09 53 mm x 3 39 86 mm x 4 13 105 mm e Roof sensor s 0 6 15 mm x 0 93 23 5 mm x 8 5 216 mm e Ground sensor s D 3 4 23 5 mm height 2 9 74 mm Tube ground sensor s D 3 66 93 mm height 3 86 98 mm For further information on the sensors please refer to the sensor manual 25 Technical Specification Factory settings settings Roof eer Function ESE settings Range Options Moisture level 5 to 95 5 being the most sensitive to moisture Melting temperature 32 F 07C to 50 F 10 C Goggen o ow SSCS System mode Automatic Automatic Constant ON manual timer Manually OFF Factory settings Ground paie settings Range Options Moisture level 5 to 95 5 being the most sensitive to moisture Standby temperature 27 F 3 0 C 4 F 20 C to 32 F 0 C Melting temperature 39 F 4 0 C 34 F 17C to 50 F 10 C System mode Automatic Automatic Constant ON manual timer lt Manually OFF 26 Appendix A Appendix
3. otherwise not stated herein is excluded 1 INCOTERMS The international rules for the interpretation of trade terms Incoterms shall apply to the commercial terms used herein 2 CONFIRMATION OF ORDER Danfoss shall not be deemed to have accepted an order until written confirmation of the order from Danfoss is dispatched to the prospective purchaser Ouotations pro forma invoices and the like shall be subject to confirmation by Danfoss 3 TERMS OF DELIVERY At Danfoss option the goods can be delivered from any of the Danfoss factories subsidiaries or affiliated companies in or outside Canada Failing special instructions the goods will be dispatched in the way which Danfoss deems best without guaranteeing this to be the cheapest way of transport 4 PRICE REGULATIONS Danfoss reserves the right to adjust accepted prices in the event of alterations in rates of exchange variations in costs of materials changes in wages interference on the part of the Government or similar conditions over which Danfoss has no control 5 PACKING Disposable packing is included in the price and will not be credited if returned Reusable packing is not included in the price and shall be returned in accordance with Danfoss instructions at purchaser s expense From the moment of delivery the purchaser shall bear all risks for the goods and Danfoss shall not be responsible for loss and damage incurred during the transportation If s
4. y Relay orerationz 14688 9 Uiew connected o Sensori 841153 sensors Errors B Aum 44112 5 Sensorz Errors 9 o Leave this mena Press O 9 Boot FW version paza Bi HAAI 9 Hain FW version 6633 43 8181 19 Text version 1011 43 Bii 19 E2PROM version Bill 43 aLal 19 Leave this mend Press D 31 Appendix B B How it works Roof system The roof system is fully automated It gathers information on moisture and temperature via digital sensors continuously The sensors are placed on strategic spots in gutters or down pipes for further information on s Standby No heating Temperature gt Temperature lt Melting temperature Melting temperature and Moisture gt Moisture limit Melting Heating Moisture lt Moisture limit the sensor please refer to the sensor EN Post heating Post heating time elapsed J manual By combining measure Heating ments of both moisture and tem perature a reliable detection of the situation is achieved Hence it is known whether heating is required to prevent ice and snow from covering the roof area After 3 hours Measuring temperature 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 moist
5. 1H y y o Sensorz View Parameter Temp 26 2 C Prioritu 1 y y o Sensor surface Leave this menu Temr 27 3 C Press D y Sensorz Moist leu 11 o y Leave this menu Press H View sensor View sensor measurements View system parameters Ground systen Ground systen parameters o y y Sensori View Parameter Temr 26 1 C Moist lew 50 y y o Sensori View Parameter Moist lew 18 Stdb T 3 H C y y o Sensorz View Parameler Teme 26 2 C Melt T 4 8 C 19 o yO Sensorz View Parameter Moist leu 11 Postheat 1H Y y o Leave this menu View Parameler Press H Priority 1 9 Leaue this mend Press D 28 Appendix A Installer menu Installer menu y Set Parameler e Enter Moist Lew Moist leu 58 Fax t y o Sel Parameler Ember Stdk temr Stdb T 3 8 C aba e t 19 Set parameter o Enter Melt temr Melt T 4 8 C ud yO Set Parameter e Enter postheat Postheat 1h a hours y o o Set Parameler ter Priority Priority 1 EBD 7 G Seledt Clogged drain ELA Warning On Warning rn T 0 Rename system Enter name er name Roof Raat a Rose NBC Jo Enter name rwd name
6. 2 or more sensors are recommended For more information please refer to the sensor manual Roof sensor one or more At least 1 roof sensor is needed for each roof area but for complex roof constructions 2 or more sen sors are recommended For more information please refer to the sensor manual For more information about the ice and snow melting function of the GX 850M please refer to Appendix B How it works User Manual General use The GX 850M is operated via 3 buttons and an alpha numeric display capable of dis playing 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 Hold for 2 seconds Return to home of menu system Master reset Hold for 8 seconds Restore factory defaults AND delete installed systems In case of unsolvable problems due to a wrong choice of o language etc Display The following icons have a special meaning an This animated icon is shown when the system is heating If icon is blinking the system wants to heat but is paused system has low priority 5 This icon is shown when the system has detected moisture and the tempera ture is above the melting temperature E This icon is sho
7. A Menu system Main menu HrRoof B Ground 355 O 5s F B G el ES Al Roco E Fir Standba 5s sMelting 19 Select sustem Al e View and set Roof operating mode lo System A View sensor o o measurements Y Select sustem B e Miew and set Ground operating mode lo System H B View sensor o measurements Only visible when System B is installed Y View alarm meru System menu System menu A B y Miew and set e Current mode operating mode Automatic e T Select mode Automatic 3 E y E Select mode 2 Constant OFF c 5 o 3 Y o Ac Select mode Constant OH 9 o Leave this mend Press O u old gt View sensor measurements 9 o UaU FN gt View system parameters Y eoo Installer e Proceed curs o mmm Ves No Installer menu y Leave this mend Press H 27 Appendix A View sensor View sensor measurements View system parameters Roof system Roof system measurements o y y Sensori View Parameter Teme 26 1 C Moist lew 5H y y o Sensor surface View Parameler Temp 27 2 C Melt T 4 8 C y y o Sensori View Parameter Moist lew 18 Fostheat
8. The Melting Heating Temperature gt temperature 1 5 C Poat heat time elapsed Melting Moisture lt Moisture limit sensors are placed on stra CO Post heating tegic spots on the ground area for further informa tion 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 is required to prevent ice and snow from covering the roof area 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 setpoint for moisture e Measured temperature is lower than the chosen melting temperature Temperature and moisture are measured continuously by 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 orde
9. 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 Press O wait System is being scanned to find type of connected sensors Select system type Roof if roof system is preferred as System A Wait until correct number of sensors for System A is found Press when all sensors are found System A is installed If sensors for System B are not connected do it now Press or wait System is being scanned to find type of connected sensors Select system type Ground if ground system is preferred as System B Installer Manual EM Wait until correct number of sensors for System B is found Press when all sensors for System B are found System B is installed System is being checked V Press to select system to configure Press to configure selected system Naming sensors 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 9 Installer Manual Installation of dual system The installation of a GX 850M with 2 roof systems or 2 ground systems has been selected It is
10. the user has selected the _ desired system Select saten Br o EA 5 als To the right is given an example of the 5 SEE O main menu and the menus for System A Only visible when System B is installed and System B UNEN A Please notice 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 Solution Missing sensor When clogged drain warning has been enabled the system constantly has been detecting moisture for 14 days A If the GX 850M controls more than 1 system and prioritizing 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 higher priority system is not heating Check gutter and down pipes for any obstacles preventing the melting water to flow away Check if sensors are covered with dirt Description Solution When the connection to a sensor is lost the GX 850M alerts the user At the same time the GX 850M automatically switches the system to Con stant Off mode and user interaction with the GX 850M is needed Acknowledge error and go to Installer Site in the menu system and select Change System Contact your local installer to get a replace
11. 4 Connect the power supply to mains Installer Manual Schematic Diagram GROUND SENSORS 24 VDC F a ON GX 850M DC PWR Supply o 120 VAC 24VDC System A System B l o 0002000000000 INOA rp DE e TN e ES j o ia S 0 Load wiring by customer 120 VAC Customer Supplied Load Load wiring by customer The dry contact relays A and B inside the GX850M are used to switch to the voltage of your choice 120VAC Maximum The diagrams on the opposite page show typical applications The ground wire is not shown 12 Installer Manual Typical Applications GROUND SENSORS GROUND SENSORS 24 VDC 24 VDC SSessesosoonosoos SSSSSOSSOSSS 13 14 15 16 17 18 19 20 21 2 23 24 13 14 15 16 GX 850M GX 850M o Alarm System A System B AH ST pc pwr Supply F 120 VAC 24VDC sr DC PWR Supply 0 120 VAC 24VDC S g 5 5 o E o z z 120 VAC 120 VAC Customer Supplied Custome
12. Danfoss GX 850M Manual NA Table of Contents 1 User Manual System OVE VEM uq b ra AR a E da A A 3 General Use nea Pom eae acus ed UE A td e a Beds 5 BULLONS xa ik 4 O O O Ye x eed eS me ov iw Re ee SS aa X B X XC P a So Rear o Re ad 5 DISD cers seas sq xe xx NN RR XO Y REG A ER RR UP Wd 5 Menu System 54 4 4 e ka Lack cR IA dO a Rog WR ae edo eo a FFO 6 Possible alarms during operation Clogged deii oce bard a aw Saw DWF Yy SR Erw SE ACIER Bc DU SO AU BN 7 MISSING SENSON uter poe ar deeem ERDF Oe Oh qd IODD deque dd ODE dote dera 7 New added sensor a 7 Sensor malfunction s s biie ENE db Seo Pat o eae A 7 Changing parameters and performance of systems FF 8 Roof Sy a eoe e a Ka gg ga S DN BA ENG a a Gg a RNA na ee UN 8 Ground SYSTEM s sa ue ee cae Se aka ORAS os eee P dp 9 2 Installer Manual System OVEIVIEW S uid ec dde OSE FESS HS X IPAE RA RA gn e RE eng 10 a WT e apa eae ag agi a Seley ees ober ag ag ete oe ee es ao amp 11 Connection steps TOM System eu ea eS OWEN ESE RO RO OR X hee eo GA eee KES 11 Installation steps for system systems eee ee es 15 General s eerren amp Barge Bh es OS ee S amp B ee Pe oe 15 Installation of roof SVSEGITI o 9 15 929 23 80x 9 4 lodo 9 Dod ede uen 16 lristallatiorof ground system an ex Sac A RUSO GEG UU Res 17 Installation of combi system o a e dde ba 18 Inistallation of dual system ss reze sy rs p DD ad ad X 20 Modification of system s
13. all be enclosed Products returned shall be free of extraneous equipment Products repaired under warranty will be returned to the purchaser freight paid by Danfoss Parts which have been replaced shall be the property of Danfoss Any other liabilities are not accepted Guarantee for products not of Danfoss own manufacture is only given to the same extent as given to Danfoss however not exceeding the normal Danfoss warranty 13 SECONDARY DAMAGES Danfoss shall not be held responsible for any indirect or consequential damage e g damages to person or property consequential loss including loss of production loss of profit loss on goods in store or the like which might arise out of defects and or delay in delivery of the products sold irrespective of the cause including faulty manufacture design of material 14 NOTICE OF CLAIMS Any claim or complaint as to defects and or delay in delivery of the products shall be submitted in writing by the purchaser to Danfoss immediately The Danfoss Guarantee Guarantee Certificate The Danfoss Guarantee is granted to Name Address Postal code Phone Important In order to obtain the Danfoss Guarantee the following must be carefully filled in See other conditions on previous page Electrical Installation by Installation date Type of thermostat Production code Supplier information Danfoss Heating North America 6711 Mississauga Road Suite 410 Mississauga Ontari
14. connected sensors Installer Manual Installer Manual System overview The GX 850M can handle up to 2 independent areas in any of the following combinations e Single roof system 1 system 1 4 roof sensors Single ground system 1 system 1 4 roof sensors 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 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 GX 850M 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 e GX 850M o Only 1 GX 850M 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 Installer Manual Placement The GX 850M and power supply are designed for DIN rail mounting When mounting please be aware of the following conditions A The GX 850M is designed and ap
15. e ground system B 2 roof systems dual system Consists of 2 x Single roof systems A and B 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 GX 850M system it is also possible to prioritize the areas Prioritizing makes it possible to operate 2 areas even if the reguired power for 2 areas is not present The GX 850M is fully automatic and operated digitally by means of the intelligent sen sors located in the heated terrain Each sensor measures both temperature and mois ture 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 GX 850M also provide the most exact readings when compared with corresponding analogue systems The result is optimum functionality 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 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 performance of a system
16. end configuration 16 Installer Manual Installation of ground system The installation of aGX 850M with 1 ground system has been selected It is optional if the sensors are connected to the GX 850M before power on or during the installation A The system uses the output System A If sensors for System A are not connected do it now Press or wait System is being scanned to find type of connected sensors EM Select system type Ground gh Wait until correct number of sensors for System A is found Press o when all sensors are found System A is installed System is being checked EM 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 con figurable parameters If for some reason you do not wish to configure the system now you can press to skip configuration of the system EM Press E to end configuration 7 Installer Manual Installation of combi system The installation of a GX 850M with 1 roof system and 1 ground system has been selected It is optional if the sensors are connected to the GX 850M before power on or during 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
17. idents at own factories or at sub suppliers 10 INFORMATION The information and technical data contained in catalogues leaflets and other written material constitutes an approximate guide only No responsibility for errors or wrong interpretation can be placed on Danfoss The purchaser cannot claim any rights based on this material Such reservation shall also apply to suggestions advice and other services rendered to customers including installation and servicing instruction for the product delivered 11 ALTERATIONS Danfoss reserves the right to make alterations to their products without notice also to products already placed on order 12 WARRANTY Provided that the terms of payment are observed the purchaser is offered a warranty of two 2 years on thermostats PX and RX Kits ten 10 years on mats and cables The period of warranty is running from the date stamped on the product The warranty covers faulty manufacture design and or defective materials The warranty shall cease to be valid if the product is repaired or altered without the consent of Danfoss applied for purposes for which it is not designed or installed and applied contrary to the instructions given by Danfoss Expenses in connection with dismantling and mounting shall not be paid by Danfoss If defects occur while under warranty the product shall be forwarded to Danfoss insurance and freight paid A description of the reason for returning the product sh
18. mandatory that no sensors or only sensors for System A are connected to the the GX 850M before power up Sensors for System B must be connected to the GX 850M during the installation steps Connection of the sensors during installation 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 Press O wait System is being scanned to find type of connected sensors UM Select system type EM Wait until correct number of sensors for System A is found Press when all sensors for System A are found System A is installed Connect sensors for System B Press or wait System is being scanned to find type of connected sensors EM Select system type 20 Installer Manual EM Wait until correct number of sensors for System B is found Press when all sensors for System B are found System B is installed System is being checked V Press to select system to configure Press to configure selected system Naming sensors changing factory settings and setting priorities Please refer to Changing parameters and performance of systems in User Manual for description of the configurable parameters EM Pres
19. ment New sensor added Description When a new sensor is added the GX 850M alerts the user and at the same time automatically switches to Constant Off mode User interaction is needed in order to correct the error Acknowledge error and go to Installer Site in the menu system and select Change System Sensor malfunction Description Solution When something is wrong with the readings from connected sensors to the GX 850M an alarm is raised A Not all error prone sensors can be discovered using this feature 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 GX 850M 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 35 F 1 5 C This means that the heating system will be activated if the temperature falls below 29 F 1 5 C and moist
20. o L5N 2W3 Phone 866 676 8062 Fax 905 285 2056 37 38 39
21. o desired by the purchaser Danfoss will at the cost of and on behalf of the purchaser effect marine Insurance in English all risk conditions from warehouse to warehouse at the c i f value of the goods plus 1096 and likewise Danfoss will effect war risk insurance 7 TERMS OF PAYMENT Where payment is not received when due an interest rate of 1096 per annum over and above the actual total back charge will be payable This rate of interest will also be used in cases where an extension of the period of credit has been granted The purchaser shall not be allowed to retain payments or to settle debts by setting off same against possible counterclaims disputed by Danfoss or to reduce the invoiced price 8 TRANSFER OF OWNERSHIP Until full payment for the goods has been received by Danfoss the goods shall remain the property of Danfoss and shall not be pawned or pledged in any way 9 TIME OF DELIVERY Time of delivery is stated approximately Danfoss shall not be liable for any delay due to causes beyond Danfoss control including 36 but not restricted to strikes lockouts labour disturbances or the like or in consequence of extraordinary measures on the part of government hindrances to transportation including ice or other transport difficulties delayed incomplete or defective delivery of material ordered in due time from sub suppliers failing supply of electricity and similar obstacles to production fire or workshop acc
22. proved to operate in the temperature range 14 F 10 C to 104 F 40 C A The GX 850M is only NEMA 1 protected thus not water resistant A The installer must ensure proper enclosure of the GX 850M according to national standards electrical safety Connection steps for system A Only authorized personnel is allowed to install the GX 850M When wiring up the GX 850M and sensors please be aware of the following conditions A When the GX 850M is used in a dual system configuration it is preferable 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 A 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 GX 850M and refer to Figure B G for a guideline to connect the heating elements to GX 850M Connect heating cables to the GX 850M e Please notice that a single system ALWAYS uses the System A output relay When using external power relay please refer to the connection diagrams 2 Connect the power supply to the GX 850M 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
23. ption and finally select the installation scenario accord ing to the system type Change setting with key o Accept setting with key o General e Power on GX 850M dh Select language System is being checked dh Select system configuration e Roof system 1 system 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 5 Installer Manual Installation of roof system The installation of a GX 850M with 1 roof system has been selected It is optional if the sensors are connected to the GX 850M before power on or during the installation A The system uses the output System A If sensors for System A are not connected do it now Press or wait System is being scanned to find type of connected sensors amp Select system type Roof EM Wait until correct number of sensors for System A is found Press when all sensors are found System A is installed System is being checked a Press o 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 con figurable parameters If for some reason you do not wish to configure the system now you can press to skip configuration of system UM Press to
24. r Supplied N L N L 120 VAC 24 VAC Customer Supplied Customer Supplied Control Relay Electric Snow Melting Hydronic Snow Melting CAUTION It is important that this equipment is installed only by qualified electricians who are familiar with the proper sizing installation construction and operation of outdoor heating systems and the hazards involved The GX system is designed for outdoor ice and snow melting applications only NOTE The installation shall be in accordance with the manufacture s instructions and national and local electrical codes The installation shall be in accordance with part 426 American National Standard Institute National Fire Protection Association ANSI NFPA70 National Electrical Code NEC and Canadian Electrical Code CEC part 1 13 Installer Manual Part Numbers GX Snow Melting Controls Part Description Voltage 088L3415 GX850M Automatic Control Panel 120V GX850M Automatic Control Panel GX Snow Melting Accessories Part Description 088L3051 Ground Sensors Two per Package 088L3052 Roof Sensor Ground Sensor Roof Sensor Installer Manual Installation steps for system systems The installation of the GX 850M is very easy and the user is guided through the instal lation process The installation process differs a little depending on which kind and the number of systems to be installed Please follow the general descri
25. r 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 35 F 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 ground A If system priority is low heating might be paused at any time A The ground system uses heated sensors which under normal circumstances will hold a temperature of 35 F 1 5 C In connection with measuring the area tempera ture heating of the sensor is turned off for 90 minutes at a time This 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 tem perature can be up to 3 hours delayed With more than one sensor this performance is significantly improved Security and energy consumption High security higher energy con
26. s to end configuration N Installer Manual Modification of system s It is possible to modify the installed systems on the GX 850M The following modifica tions are possible e Reactivate passive sensors e Replace a malfunctioning sensor Add an extra sensor When the GX 850M cannot communicate with a sensor the GX 850M reports the error Errors detected The GX 850M does not rely on malfunctioning sensors and therefore the GX 850M makes the sensor passive The passive sensor is no longer used for ice and snow detection not even after a power cycle A Ifthe malfunctioning is caused by problems with the wiring the failure can be fixed and the sensor can be reactivated A Ifthe malfunctioning is caused by an error prone sensor the error can be cor rected by replacing the error prone sensor with a new sensor A Itis 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 GX 850M please refer to chapter General use Reactivate passive sensors The given example is for a ground system EM 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
27. s detected 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 27 F 3 C Moisture level The moisture level decides when the system detects moisture The factory setting is 50 on a scale from 5 to 95 The lower the setting the more sensitive 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 capital A Installer menu The factory setting is 1 hour on a scale from 0 to 9 hours Priority When using the GX 850M as a dual or combi system it is possible to prioritize the sys tems When the priority of 2 systems is egual 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
28. s sone a Y ga RR RC RR WCH E ORC AW US 22 3 Technical Specification WG A el sin nee NEWN Y ENOC OY HR YN NNDR DN ee an a 25 Factory settings Roof system doses 42544 RD a a e 26 Factory settings Ground system our drops arre RP X 26 A Appendix a ae ap stirrer ARAS ARALAR AAA AC Menu system ed oed 418 ax X YRR RHODES CAG kreu o AC RRA Y 27 BEHOWIWOIKS seacha a Ra Xo AF eS Boa ORUG RR o ERR EI S RU e a 32 ROOF S MC ca ase GG EA mg UB GA GN dos et ird GU AD ED beg 32 Ground SISTE sso wa taa 9 X43 5 x 9 09 DG UAD CON DD 33 Security and energy consumption Y o R3 Ree Mene deg es 34 C PSUand feedercable as scriu io tardor sep Sais dati PD Seeks ARA 35 Ground 5 VSEBITI uo rica br is FAD M EAR d 35 e A CR Qoa MORI RUN SUP IS dU 35 User Manual System overview The GX 850M system is capable of keeping outdoor areas free of ice and snow The GX 850M can handle up to 2 independent areas in any of the following combinations e Single roof system To keep gutters valley gutters and down pipes free of ice and snow and to prevent ice dams 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 entrances 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 singl
29. seconds If no new sensors are found it is reported to the user Message is shown for 3 seconds 22 Installer Manual Replace a malfunctioning sensor 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 Press to loop through the found passive sensors or to cancel replace sensor 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 Press to loop through the found new sensors or to cancel replace sensor Press when the correct new sensor to add is found or 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 From the installer menu select Change system The system is searching for connected sensors Press to loop through the found new sensors or to cancel add sensor Press when the correct new sensor to add is found or Cancel add sensor is selected 3 Installer Manual If the user selected a new sensor to add the sensor 24 Technical Specification Technical Specification Technical data Voltage e GX 850M 24 VDC e Power supply 120 VAC 50 60 Hz Enclosure Type and Dimensions NEMA 4X Outer dimensions 7 H x 7
30. sumption If a high degree of security against ice and snow is wanted make the following adjust ments of the operation parameters e Increase the standby temperature lt 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 Decrease the standby temperature Decrease the melting temperature e 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 A The factory settings are average values providing a relatively high degree of security and moderate energy consumption 34 Appendix C Sensor cable extension dc 24W 24W in parallel dc 24W 24W in parallel Number of 1 2 3 4 ee m m m m 35 The Danfoss Warranty GENERAL CONDITIONS FOR SALE AND WARRANTY The acceptance of the order confirmation by the purchaser includes the acceptance of our General Conditions of Sale and Warranty as the only ruling condition No modification of these conditions will be recognized by Danfoss Any express or implied condition statement or warranty statutory or
31. ure is detected Moisture level The moisture level decides when the system detects moisture The factory setting is 50 on a scale from 5 to 95 The lower the setting the more sensitive 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 capital A Installer menu The factory setting is 1 hour on a scale from 0 to 9 hours Priority When using the GX 850M as a dual or combi system it is possible to prioritize the sys tems When the priority of 2 systems is egual 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 capital A Installer menu 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 39 F 4 C This means that the heating system will be activated if the temperature falls below 4 C and moisture i
32. ure is higher than the chosen setpoint 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 cho sen level the post heating period will start Post heating ensures that no ice and snow is left on the roof 32 Appendix B Ground system Temperature lt Standby temperature Standby Temperature gt Standby Standby temperature Mantaining standby Temperature lt Melting temperature temperature h Heating Moisture gt Moisture limit The ground system is fully automated It gathers information on moisture and temperature via digital sensors continuously
33. wn when the system has detected snow or ice and the tem perature is below the melting temperature The GX 850M can simultaneously control up to 2 different systems These 2 systems are referred to as System A and System B The GX 850M gives the user the opportu nity 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 guick overview of all the sys tems Flipped view The flipped view shows the status of one 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 O o 4 Menu system The menu system is navigated by the keys No matter if the GX 850M controls one A Roof or two systems the look and use of the o E bs menu system is always the same This is A ast AN obtained by making the entry to each d on Nu system in the main menu The possibili Rect y lt ties and settings for each system are first o A accessible after

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