THERM DUO 50 FT-angl.
Contents
1. emissions to the air their operation is economical and it does not harm the environment The boiler output is adjustable within 50 and 100 and it adapts itself to the current needs depending on heat losses The high technical standard is guaranteed by the use of top components from the best world producers Important The boiler is designed for heating systems equipped with an open expansion vessel with min height of 8 m above the boiler 2 GENERAL DESCRITPTION OF THERM DUO 50 FT All functional parts of THERM DUO 50 FT are fixed to a metal supporting frame There are two copper flue exchangers in its upper part Their surface is protected by an aluminium and silicone mixture Inside the tube sheet there are turbulators which have to be protected against blocking by dirt from the heating system Therefore it is necessary to install a filter at the return water inlet in the boiler To maintain the minimum losses of heat transfer it is essential to keep exchanger lamellas clean The exchanger usually gets dirty when dust particles are burned the boiler operates in a dusty environment There are automatic deaerating valves on the inlet and safety contact thermostats on the outlet of the flue exchanger The combustion chamber is made of aluminium plated metal sheet and it is inlaid by a heat insulation The front wall is removable Above the exchangers there is an exhaust rectifier There is an eighteen armed water cooled low NOx gas burne2. service measurements emissions flue temperature etc LCD display GINE il EES o o D MO The meaning of the used symbols B BB temperature failure modes and service data in digital numbers it heating mode heating temperature displayed boiler burning C temperature symbol le K factor value displayed weather compensated mode summer mode selected ee winter mode selected X boiler ignition failure vA symbols for indication of communication with the connected interface IU02Q IU04 10 IU05Q The set temperature indication When you turn a knob for heating or DHW heating control the relevant mode symbol starts flashing and the display shows the temperature which is being set i e the display shows the changes of the temperature When you stop adjusting the set temperature is shown for another 5 seconds After that the display shows the real temperature of the current mode again Failure or operational values exceeding indication The LCD display shows E and failure code for codes see the following chart failure code meaning E01 ignition failure E02 insufficient heating water through flow between repeated attempts E03 E04 heating water sensor damaged E05 DHW sensor damaged only for boilers with DHW through flow heating E06 heating water temperature limit broken safety thermostat or transition resistance on microswitch of thro
3. supplied and another through which the flue gas will be exhausted 3 TECHNICAL SPECIFICATIONS units DUO 50 FT Flue natural gas Boiler category lou Maximum heat input kW 49 Minimum heat input kW 27 5 Maximum heat output for heating kW 45 Minimum heat output for heating kW 25 Number of burner nozzles ks 36 Nozzle drilling mm 1 Gas excess pressure at the inlet mbar 20 Gas pressure at burner nozzles mbar 4 12 Gas consumption m h 2 9 5 2 Max heating system excess pressure bar 3 Min heating system excess pressure bar 0 8 Max heating water outlet temperature 2C 80 Average flue temperature C 100 Max weight flue flow g s 44 7 Max noisiness dB 53 Boiler efficiency 96 92 Boiler NO class 5 Nominal supply voltage frequency V Hz 230 50 Nominal electric input W 150 Nominal fuse current A 1 6 Level of electric components cover IP 41 Surroundings according to valid norms Lace Flue exhaust diameter mm 80 125 2x80 Dimensions height width depth mm 900 600 475 Boiler weight kg 52 4 PRODUCTION CHECK All boiler parts are rechecked and set by the manufacturer before they are assembled Each boiler is tested for water system staunchness gas system staunchness regulating and safety components are rechecked and set 5 INSTRUCTIONS FOR BOILER MOUNTING Boiler mounting can only be done by a qualified expert company while this has to respect all the advice and notes in this manual The mo
4. temperature probe Outside temperature sensor D DIMS 01 TH 01 DIP switch i Modulator Room thermostat Safety thermostat Manostat PoR ii Through flow 2 3 o switch i Pump Propane natural gas n ERE NN NN OX 3 way valve Pe z J yg as tn E CN ud ee er OR ON Y BURNER N L Supply 15 12 DIMS01 TH01 modulation electronics Description of setting elements Jumper JP1 gas type selection natural gas propane interconnection 2 3 natural gas interconnection 1 2 propane Dip switch Boiler type and parameters changing switch psi pHw PS exte pss cascade DSA DS5 DS6 sensor OFF tank without ext uw sensor ON through flow Withlext master microswitch sensor test Factory setting DS1 according to the boiler type DS2 OFF mode 1 1 DS3 OFF DS4 OFF pump run down 50 5 minutes anticycling time 50 5 minutes gas selection JP1 depending on the order Description of operation 1 1 Mode Heating up the system without weather compensated regulation Setting Outside sensor not connected service buttons DS2 DS3 OFF The boiler starts working when the room thermostat closes the mode switch being in the winter position The pump and ignition automatics start operating too The boiler is ignited at the set starting output This is kept for 2 seconds after ignition the feedback of the ignition automatics Then the output i
5. Ue ax EIE DR REX Soa PEENEKS ENEA 10 JDBolerh angihg unenssai e ree e ra coe FR eL epe Pe EL eese a Eaa 11 Graphs for output and connecting excess pressure setting eese 11 e 9 1 Graphs for usable connecting overpressure of heating water 11 e 9 2 Graphs for output setting ssiru tret er eee Dre desee e 12 Therm DUO 50 FTSE sroin ter tee n tne ern r tue keeper a RAP ERR EE Noua 13 Wiring GIAGTAMS M 15 DIMSO1 THO1 modulation electronics seen rennen 16 Guarantee and liability for defects 2e eterne Dore e 18 Installation VetslQlls er neret nhe rir esie EE REX RR boe Ple DPA Re E red epa dua 19 uenire M 20 Qu abhty CertfiGale 11er Fire rrr idee P sans Prae earn ets tens HET ex EET drea ua 21 1 USAGE THERM DUO 50 FT is an advanced wall mounted source of heat energy for premises with the maximum heat loss of 45 kW It can be used separately or in a cascade for large buildings The demanded output of the boiler room will be acquired by using more Therm Duos in a cascade which is controlled by its own expansion regulation including weather compensated regulation In this easy way you can acquire a heat source with high efficiency The construction of boilers in a cascade lowers the operational costs and losses compared to standard boiler rooms The boilers are designed as appliances with maximum efficiency and minimal
6. a Manual for installation and maintenance Therm pvo sorr hermon Contents Un A WwW N 10 11 12 13 14 15 16 a Usage are a a a vers jane a a E a A 3 General description aene re en EEREEERR EUREN NEES VEEE EN ENEE SNEEN A E Fa potet 3 lechniealspecHicatiOns iuueni ense nte ine eie EEEREN rE AE eer adds 4 e Production check 45e eter aer le cr enu aede rie eese tg 5 Instructions Tor borlermounting leer erret er enr e iue AEE 5 Position ofthe boller 5122 eate ren eret eit reise ebat rede 5 Boiler hanging acoso ee cene eerte ete e eri e ra erts 5 e Boiler connection to warm water system eseesseeeeneeeneem eme 5 Boiler con ection O aS osiccsdtenedatessitetcedt soasadedbsslavtacsscestalarueelueaisdd 5 Boiler connection to supply m alns 2 eere rne 6 Boiler connection to Chimney aiiis iino e b e e s 6 v Heating system Time urere ere teri eh i eee rele eata 6 Choice of regulation and control elements seen 7 8 start the DoOllet 5e eden beu HI du unDI E ERE 7 e Disconnecting the boiler 142i exegerit ine hi isaveclicseapet ides 8 Regulations for control and maintenance sse 8 Us of the Hoile pasienten ero Peer eee Eget ee idee t deen 8 LED display 9 Maintenance c r 10 Gas fitting SIT 845 SIGMA aurei erret ensten tnl
7. as cock must be freely accessible The boiler is designed for natural gas with 9 to 10 5 kWh m heating power and 20 mbar nominal pressure in the distribution net Important If you change the boiler to another gas type it is necessary to dismantle burner s ramp to change the nozzles and to reset the min and max pressure on the gas fitting Further it is necessary to reset the concerned parameters on the modulation electronics The change and resetting can only be carried out by a trained service worker certified by the manufacturer Boiler connection to supply mains The boilers are equipped with a triplex flexible cable with a plug They are to be plugged in the socket nearby so that the plug is accessible even after the boiler is mounted The socket must be protected by a neutral or an earthing with the protection pin at the top and the neutral connected on the right from the front view The mains voltage must be 230 V 10 The socket installation the connection of the room thermostat and the maintenance of the boiler s electrical parts can only be provided by a professional person qualified for electrotechnical work pursuant to the valid norms Boiler connection to chimney In order to exhaust the flue gas and supply enough combustion air in the boiler a double pipeline 80 125 mm is usually used These pipelines are provided by the manufacturer of the boilers and it is possible to order them according to the concrete projec
8. at go horizontally through the perimeter wall or vertically through the roof construction out into the open space The coaxial tubes must be installed in such a way that any penetration of rainwater or condensed water into the boiler can be averted It is therefore necessary that the vertical tubes be finished with a stack whereas the horizontal tubes must be installed with a moderate fall in the direction from the boiler to the flue exhaust Should these instructions be disregarded the components inside the closing chamber in particular the flue ventilator are easily liable to damage The ventilator s operation is checked by manostat When the electric manostat contact closes the ignition cycle starts and the burner is ignited GRUNDFOS 15 60 pump is used for this version Graph for usable connecting overpressure of heating water with max boiler output and heat slope up to 20 C shows relatively low excess pressure for the heating system It is necessary to remember to use an additional system pump mainly when a separate boiler is installed into a heating system especially with horizontal distribution nets It is necessary to use 80 125 mm flue gas ducting for this type of boiler Proportion of outlet flue gas ducting is 60 mm Don t forget to put reduction from 60 100mm to 80 125mm pipe directly on the boiler flue outlet It is possible to use a distributor above the boiler and lead a separate pipe through which the combustion air will be
9. automatically Using this kind of boiler regulation you lower the operational costs and you improve the heat comfort the heating elements are heated continuously It can also be used as a pre regulation of a primary heating circuit for zone regulation mixing valves etc It is certain a room thermostat can be used to lower the temperature of the heated room In this case we recommend the version without PI regulation closing then operates on the basis of temperature differences The knob for heating temperature setting is to be set to a value a little higher than it is when a room thermostat is not used If the outside temperature sensor is not working the failure is signalled and the boiler works in the previous mode without weather compensated regulation Mode Heating DHW tank Setting Service button DSI OFF DS2 as above DS3 OFF The electronic regulation circuits are adapted for DHW tank heating The boiler starts working when the tank thermostat closes The relay of the 3 way valve is activated and the valve changes into the position for heating DHW After 8 seconds the pump relay and the ignition automatics relay close as well The boiler ignites at the starting output 2 seconds after ignition and then the output rises to the maximum so that the outlet temperature is raised to 80 C as soon as possible This temperature is then maintained by PID regulation When the tank is heated up the thermostat opens and the boiler stops
10. burning After 10 seconds the pump stops and switches off the 3 way valve relay The valve changes into the position for heating While the valve is changing about 8 seconds any ignition demands are ignored Only then can the boiler continue heating up the system if required DHW tank heating is prior to the heating of the system if they are required at the same time 17 Additional functions The pump starts running regularly when not operational it runs for 3 minutes after 24 hours of inactivity Antifreeze protection is activated when the temperature in the boiler falls bellow 8 C Le the pump starts running the boiler ignites and it heats the circuit up to 35 C When this temperature is reached it switches off Are check of a through flow switch is activated if the pump runs for 15 seconds and the through flow switch does not work The pump stops and after 45 seconds another attempt at switching the boiler on is made This is repeated 10x After this the boiler has to be switched off and on by the mode switch If the pump was inactive for more than 30 minutes before another boiler switch on the first interval of the pump is 180 seconds The accredited service technician is bound to inform the user about the correct use of the boiler about its parts and safety elements to fill in the guarantee sheet and to give the user this manual The user has to use the boiler only in the ways described in this manual This is also
11. e the communication Open Therm is signalled by top arrows in the display corners A when it is a communication of a cascade IUO4 10 and IU05Q it is signalled by bottom arrows Y Y Maintenance Regular maintenance is very important for reliable operation long life and combustion efficiency We recommend the user to contact the local service company and to agree on regular yearly boiler checks see also Conditions for guarantee claims A service technician can e g check the control and safety elements of the boiler check the gas and water installations or clean the burner and exchanger It is also necessary to check the pressure of cold water regularly If the pressure is low it is vital to refill the heating system The user can clean the outside case with a cloth dipped in soap water and then dry it 7 GAS FITTING SIT 845 SIGMA Sampling points for gas pressure measuring Gas fitting SIT 845 SIGMA is equipped with two sampling extensions for gas pressure measuring see the picture The extensions are standardly equipped with tightening screws which are to be loosened for measuring After the measuring they have to be carefully tightened again the recommended tightening moment is 1 Nm 4 Outlet gas pressure T Inlet gas pressure t The setting of ma
12. ed in the guarantee Disconnecting the boiler The boiler can be switched off by mode switch or by the switch on the room thermostat For long term disconnection outside the heating season e g during the summer holiday it is advisable to close the gas tap 6 REGULATIONS FOR CONTROL AND MAINTENANCE Boiler controls Service buttons LCD display ate ate fe v X V fe S X V fe S li See A _ a Me FR TN OKT x f ON S5 FN LN ZA 4 Ee sAm Re ar Po gW Hanae Pa 0 POETAM a i si NEA Ne Pt y Mode Heating DHW switch temperature temperature Manometer setting control Service buttons used for diagnostics and boiler parameters setting Heating temperature control turning knob for user s setting of water temperature in the heating system within 35 80 C the recommended range is 55 80 C If weather compensated regulation is used you can set the heating curve within 15 C from the weather compensation curve Setting of DHW temperature is available only on CX and TCX boilers Manometer show the water pressuer in the heating system Mode switch includes these modes 0 Boiler switch off Summer DHW heating into tank on heating off Winter both heating and DHW heating into tank on 6 Failure unblocking FA Service mode heating is on at the max output and temperature This mode is used for
13. l and it must be submitted 18 14 INSTALLATION VERSIONS Realizations Cy2 Coaxial horizontal version with the outlet into the perimeter wall The piping can also be doubled the outlets are either concentric or placed so closely to each other not further than 50 cm that they are exposed to the same climatic conditions C32 Coaxial vertical version with the outlet onto the roof The piping can also be doubled the outlets are either concentric or placed so closely to each other not further than 50 cm that they are exposed to the same climatic conditions C42 Separated connection to two pipelines within the same shaft The outlet of both shafts is either concentric or placed so closely to each other not further than 50 cm that they are exposed to the same climatic conditions Ca Separated pipelines with the outlet into the perimeter wall or onto the roof into two zones of different pressure but never into two opposed perimeter walls C Separated connection with the flue exhaust into a separate or common chimney The supply of combustion air is provided through the perimeter wall 19 15 RECORD OF GUARANTEE AND POST GUARANTEE REPAIRS AND YEARLY MAINTENANCE CHECKS Operation Authorized company Customer s signature Packaging and product disposal All material used for production correspond with the requirements of valid norms and regulations The product packaging is to be handed in the paper di
14. ng system is controlled depending on the outside temperature measured by the outside sensor The calculation of the necessary temperature of the heating system is a function of the outside temperature and factor K weather compensation curve inclination The factor is set by the service technician according to the nature of the place and the heating system The user can set the demanded heat comfort with the heating water temperature knob on the control panel the curve can be changed in the range of 15 C of the heating water The weather compensation curve is calculated for the standard heating system with radiators 16 Graphs of curves inclination change The inclinations The changes k a B ll a 5 a D a 5 teplota kotle teplota kotle 5 B 6 a n venkovni teplota venkovn teplota It follows that in this mode the knob on the control panel which is used for setting the temperature of the heating in fact shows the demanded temperature of the room We recommend the initial service setting to be K 1 6 The user s setting of the heating temperature knob to point upwards which means 0 C change After 24 hours of test heating the setting can be changed according to the demands for heat comfort The weather compensated regulation will still work and the set temperature will be maintained constant
15. ps the boiler in longer operational modes It is also recommended to set the boiler thermostat to 60 C in autumn and spring and to 80 C in winter It is advisable to use the inbuilt weather compensated regulation either separately or with a room thermostat see lower These expansion regulation types are not delivered with the boiler Starting the boiler Only a service technician certified by the manufacturer can start the boiler for the first time Before the first ignition it is necessary to carry out the following steps make sure the heating system is filled with water and the boiler is deaerated 7 make sure all valves are open open gas tap and check the gas installation for leaks The procedure for first ignition set the output temperature knob to maximum plug the supply in and switch on the boiler by the mode switch when you shortly turn the mode switch to the failure unblocking mode the boiler ignites automatically if the gas supply is deaerated properly check if all the safety thermostats and control elements work correctly check the setting of the boiler output range adjust the setting according to the needs of the heated building if necessary KS gt Important The boiler output range setting and other parameters must follow technical specifications In case of overloading or improper use may result in damaging the boiler Components damaged in such a way are not includ
16. r in the lower part of the combustion chamber The burner is a product of POLIDORO It has an advanced modular construction and it is fitted with three electrodes Two of them ignition electrodes ignite the burner the third ionization electrode checks the burning SIT gas fitting is connected to the burner by a grommet and screwing The fitting includes a gas pressure regulator and two solenoid valves controlled automatically There is also a modulating electromagnet The magnetic coil core of the modulator has an adjustable lift so gas pressure into burner can be adjusted within the set range There is a Grundfos pump on the return water inlet The pump drives the water through the boiler The sufficient through flow is watched over by a through flow switch Moreover there is a safety valve connected to in front of the pump to protect the boiler against excess pressure The control panel is made of plastic The control elements are placed on the front of the plastic control panel see the operational rules There is a DIMSOI THOI microprocessor automatics for boiler control inbuilt inside THERM DUO boilers work without an ignition burner and they are ignited with an electric spark which means greater gas savings The ventilator and the components engaged in gas combustion and power transformation are inbuilt in a closing chamber The sufficient supply of combustion air and the forced flue exhaust are usually ensured by the coaxial tubes th
17. raw no 3 Th 0110 store no 40582 Temperature probe TPI store no 21045 Burner 465 0118 04 18 ram NOx store no 21054 Gas valve SIT Sigma 845 store no 41366 Solenoid coils store no 41394 Through flow switch MPFP224 1 store no 20383 Circulation pump Grundfos UPS 15 60 Cacao store no 41367 Electropanel Automatics DIMS THO1 store no 24646 Safety valve 3bar 1 2 52201230 store no 20791 GI G3 4 G1 2 GI Heating Gas Safety Return water outlet inlet valve outlet water inlet Left ignition electrode store no 40606 Ionization electrode TE store no 40594 Gasket 1 store no 40028 Y Gasket 3 4 store no 40029 zi Gasket 1 2 store no 40030 ug Right ignition electrode HL store no 40593 Electrodes position above the sheet 5nm F 13 10 2 THERM DUO 50 FT set side and top view 14 11 1 Wiring diagram of THERM DUO 50 FT connection LCD display with service buttons PC INTERFACE Black DHW tank pue thermostat Interface IU02 IUO4 IUO5 Heating
18. s lowered to the minimum with slow linear rise approximately 1 min up to the modulation point The point value depends on the factory setting of the max heating output The boiler output control at this moment is PID proportionate integral derivative while the temperature set on the control panel knob is maintained within 35 80 C When heating the system with a lower input than the minimum boiler output is the outlet heating water temperature exceeds the set temperature by 5 C At this moment the boiler stops burning but the pump is running and the re ignition is restricted for some time the factory setting is 0 10 minutes All this means the boiler is highly flexible heat source from the point of the number of consequently controlled heating systems e g zone regulation thermostatic valves etc When the room thermostat opens the pump runs down in the set time the factory setting is 0 10 minutes This function is used to cool down the exchanger to drain heat from the combustion chamber and to balance the temperatures of different heating elements useful mainly for horizontal distribution systems when room thermostats with PI link with short operating cycles e g Honeywell CM707 1 2 Mode Heating up the system with weather compensated regulation Setting Outside sensor connected service buttons DS2 ON DS3 OFF The boiler operates on the same basis as above The only difference is the temperature of the heati
19. s microprocessor through IUO2Q interface In this way not only information about the required heating system temperature depending on the room and outside temperature is transmitted but also the information about the boiler operation is displayed mode output temperatures malfunctions possible DHW tank heating switch off etc This system includes a lot of adjustable and displayed parameters for optimal control of the heating system with boiler output modulation Boiler rooms with cascades can be controlled with our unique system of communication among individual boilers For this purpose there is interface IU 04 10 which transports the output needs of the boiler room calculations and information between the boilers it influences the number of working boilers and their outputs For even better communication interface IU 05Q can be used for the controlling boiler This interface includes the features of IU 04 10 interface communication among boilers and features of IU 02Q interface communication with programmable QAA 73 110 This kind of communication offers more programmable options and it displays the operational modes of the boiler room modes output temperatures failures communication failures possible DHW tank heating switch off during night etc Recommendation We recommend controlling the actual boiler operation without weather compensated regulation at least by a basic room thermostat The room temperature is constant and it kee
20. s of the boiler starts you have to switch off the boiler by the mode switch pointer to 0 Boiler hanging Before the boiler is mounted make sure the chosen place meets the requirements for flue exhaust placement and for minimum distances stated in the previous chapters If the boilers are place in a cascade we recommend fitting them on a common supporting structure Boiler connection to warm water system Boiler rooms with THERM DUO 50 FT cascades must be solved by a project according to hydraulic ratio calculations with respect to total outputs The connection of boilers to heating distribution systems and gas distribution must be carried out so that the boiler outlets are not strained Before the boiler is connected it is necessary to purge the heating system to remove all impurities and sediments The return water inlet must be fitted with a suitable filter The heating system must observe the relevant local norms Make sure the minimum excess pressure of the heating system is 0 8 mbar Boiler connection to gas The boiler must always be connected to gas by a professional company with valid certification and its professional certified employees and according to the approved documentation for gas fitting The gas regulator is not to be fitted in front of the boiler as it is inbuilt in the gas armature which is a part of the boiler A round gas cock with a certificate for gas must be fitted to the boiler s gas inlet The g
21. sposal area the foil in the disposal containers for plastics The boiler parts made of steel copper and copper alloy is to be handed in the metal disposal area Heat insulation of the combustion chamber is harmless to health and can be disposed of in the domestic refuse 20 hermona v echno co d l me h eje PRODUCT QUALITY AND COMPLETNESS CERTIFICATE THERM gas boiler Type DUO 50 FT Serial number The products fulfils the valid guidelines technical norms and regulations and its operation is safe under common conditions Measures have been taken to secure the accordance of this product with the technical documentation and with the basic technical safety and hygienic requirements The product is certified by Engineering testing institute authorized person 202 THERM DUO 50 FT certificate for type testing according to EC guidelines for gas appliances 90 396 EHS no E 30 00123 06 THERM DUO 50 FT certificate for efficiency according to EC guidelines 92 42 EHS no E 30 00124 06 Technical check dale eaea A E E a TRES stamp and sigBal te oie rete ted beue te ze eed aed due THERMONA spol s r o Star osada 258 Zast vka u Brna 664 84 Tel tfax 546 411 006 546 411 230 546 429 200 21
22. t s specifications horizontal or vertical exhaust including gasket sleeves o rings etc It is logically possible to use a distributor above the boiler and lead a separate pipe through which the combustion air will be supplied and another through which the flue gas will be exhausted Given the wide range of possible solutions the exhaust components are not delivered as the standard boiler fixtures Connection of the boilers to solid flues must be carried out in compliance to the valid local norms A concrete solution of flue exhaust must be dealt with in a corresponding project that complies with the standard rules relating to the situations when the condensed water needs to be drained or penetration of rain water into the boiler averted The maximum length of the coaxial flue exhaust approved by the manufacturer Horizontal piping 3 metres measured from the elbow of the appliance to the opening on the facade Each 90 elbow that comes next reduces the length by 0 75 m each 45 elbow by 0 5 m Vertical piping 2 7 metres measured from the appliance to the bottom of the room terminal Each 90 elbow that comes next reduces the length by 0 75 m each 45 elbow by 0 5 m If you use the distributor as well as an exhaust piping and induction piping with the diameter 80 mm the maximum length is 6m sum of exhaust and induction Heating system filling During the time when the heating system is being filled with water the boiler m
23. the condition for guarantee The user is strictly forbidden to change or interfere with the fixed parts of the boiler 13 GUARANTEE AND LIABILITY FOR DEFECTS The manufacturer is not to be held liable for any mechanical damage of individual components caused by malpractice for defects caused by unprofessional handling with the electronics while adjusting or adding extension regulations or for defects caused by using other parts and components than the original ones used by the manufacturer Further the guarantee does not cover any defects caused by breaking the important notes and conditions stated in individual paragraphs of this manual for installation and maintenance The guarantee does not either cover situations caused by non standard conditions in the distribution network voltage fluctuation and overvoltage peaks gas pressure and purity etc defects of appliances outside the boiler which influence its function wrong flue exhaust impurities in the combusted air damage caused by external influence mechanical damage storing transport and defects caused by natural disasters In these cases the service company may also require the customer to pay for the repairs Conditions for guarantee application 1 The maintenance check of the boiler must be carried out 1x a year It may be done by an authorized company bound by contract 2 All guarantee repairs and yearly maintenance checks must be recorded on the appendix of this manua
24. ugh flow switch E07 outside temperature sensor damaged for weather compensated regulation E08 flue exhaust failure flue thermostat reaction or reaction or failure of manostat for turbo boilers or transition resistance on microswitch of through flow switch E12 insufficient heating water through flow after repeated attempts E13 microswitch test Other kinds of information shown on the display Using service buttons buttons in the top left corner right arrow Qe step forward left arrow Qe step backwards you can see these parameters in this order 1 The set temperature of the heating water W C flashing value 2 The real temperature of the heating water it C the value 3 The set temperature of DHW C flashing value 4 The real temperature of DHW C the value 5 Outside temperature 2 C the value 6 Weather compensation curve change 12 the value 7 Back to standard display The value in numbers is shown with the relevant symbol for 10 seconds after you stop making steps Then again the display returns to the standard mode For X and XZ boilers there is no value displayed the display shows These parameters are displayed only when the boiler operates in the weather compensated mode and when the outside temperature sensor is connected and not damaged When the boiler is controlled by QAA 73 110 room regulator with IUO2Q interfac
25. unting has to be carried out in correspondence with valid local norms and regulations and technical guidelines The mounting company is required to check if the boiler type is the ordered one the choice of boiler was correct as far as the situation is concerned gas type heating system exhaust the delivery is complete In case of any doubts inform the manufacturer or the supplier before mounting Position of the boiler The design and construction of THERM DUO FT boilers enable them to be used both in places of living and other places boiler rooms etc The boilers have IP 41 cover of electrical parts which fulfils the conditions for resistance to vertically dripping water The room where the boiler is placed must be a common basic surroundings AB5 protected against frost with ambient temperature within 5 C and 40 C with relative humidity lower than 80 96 according to valid norms The combustion air must not contain halogen hydrocarbon or aggressive vapours it must not have high humidity and dustiness The size of the room where the boiler is installed and its airing must follow valid technical regulations Important No flammable objects can be placed within the safe distance from the boiler i e 50 mm and within the safe distance from the exhaust pipe and check glass i e 200 mm The wall where the boiler is mounted must be made of inflammable material Before any work which could change the surrounding
26. ust be unplugged The recommended heating water pressure is the range of 1 1 5 bar when the system is cold It must be filled slowly so that the air bubbles can escape through deaerating valves The water used for both first filling and refilling must be clear colourless without suspended solids oil or chemically aggressive additives it must not be acid pH lower than 7 with the minimum carbonate hardness max 3 5 mval l or it must correspond with the relevant local norms If the water is modified because of hardness only the agents recommended by the manufacturer are usable If any of the previously mentioned conditions is not met the guarantee does not apply to the damaged components Choice of regulation and control elements The boiler is equipped with basic regulation and safety elements as follows from the following wiring diagrams As further expansion it is possible to use regulation according to the temperature in the selected reference room or the weather compensated regulation of the heating water or a combined regulation A wide range of thermostats is available at the manufacturer for the room temperature control e g SIEMENS REV 23 Honeywell CM 707 CM 67 or Electrobock PT 21 PT 30 and others For the weather compensated regulation Thermona offers the outside sensor THERM QOI There is also a high quality regulation element intelligent programmable SIEMENS QAA 73 110 which communicates with the boiler s automatic
27. ximum minimum and starting power is to be carried out by a service company worker and following the service manual Important The system for the setting of gas pressure range on modulator is protected by a plastic cover That is removed for gas pressure setting and after the setting it is necessary to put it in its original place necessary for correct work of modulation coil 10 8 BOILER HANGING Fixing strip for boiler hanging 9 GRAPHS FOR OUTPUT AND CONNECTING EXCESS PRESSURE SETTING 9 1 Graphs of usable connecting overpressure of heating water Connecting overpressure Therm DUO 50 E Wilo 4 Grundfos Outlet overpressure mbar Water throughflow m h Important The curves of usable connecting overpressures of heating water are done for Wilo 25 70 and Grundfos 15 60 pumps at the highest level of regulation We do not recommend lowering the pump output because of the boiler output and circulation features of the exchanger 11 Graph for output settings of THERM DUO 50 FT natural gas nozzles 1mm A 2 E g 5 a a o o Boiler output kW 12 10 BOILER SETS 10 1 THERM DUO 50 FT set front view Ventilator Deaerating valve 2pcs WATTS store no 40430 Manostat LGW 3A store no 20478 Boiler frame Safety thermostat 96 C store no 40035 _ Flue exchanger PR20 323 store no 20405 Combustion chamber d
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