Viessmann Vitodens 100 Installation And Service Instructions Manual Download Page 78

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Check the DHW temperature sensor (only for gas combina-
tion devices)

Pull the leads from outlet tempera-
ture sensor

Check the sensor resistance and
compare actual values with the
curve.

Replace the sensor in case of
severe deviation.

Note

Water can leak out when replacing
the outlet sensor. Close the cold
water shut-off valve. Drain DHW
pipe and plate heat exchanger
(secondary side).

Repairs

(cont.)

Troubleshooting

670

Summary of Contents for Vitodens 100

Page 1: ...tion and service instructions for heating engineers Vitodens 100 Type WB1A Gas fired wall mounted condensing boiler Natural gas version See applicability on the last page VITODENS 100 5862 670 GB 2 2005 Please keep safe ...

Page 2: ...oned by the system installer or a qualified person authorised by the installer If you notice the smell of gas Danger Escaping gas can cause explo sions which may lead to ser ious injury Do not smoke Prevent naked flames and sparks Never operate light switches or those of electrical equip ment Open windows and doors Close the gas shut off valve Heating system shutdown Remove all personnel from the ...

Page 3: ...ration of your heating system Replace faulty components only with original Viessmann spare parts Ancillary components spare and wearing parts Important information Spare and wearing parts which have not been tested together with the heating system can compromise its function Instal ling non authorised compo nents and non approved modifications conversion can compromise safety and may infringe our ...

Page 4: ...nections 32 Flue outlet 39 Electrical connections 41 Commissioning and testing 47 Service instructions Initial start up inspection maintenance 58 Service Instructions Routine Servicing Instructions 58 Troubleshooting Fault finding 69 Repairs 74 Designs Connection and wiring diagrams combi boiler 82 Connection and wiring diagram system boiler 84 Parts lists 86 Certificates Declaration of conformity...

Page 5: ...mp diverter valve assembly flow switch combi boiler only DHW plate heat exchanger combi boiler only safety valve and CH expansion ves sel A separate DHW expansion ves sel is not required Internal frost protection and an elec tronic control unit is fitted as standard equipment and the boiler may be used with any suitable room thermostat and or time clock in addition to the optional controls availab...

Page 6: ...Including expansion Vessel l 3 5 3 5 Minimum CH system pressure static head Cold bar 1 0 1 0 Maximum CH system pressure static head Hot bar 3 0 3 0 Maximum CH flow temperature C 80 80 Integral expansion vessel capacity l 8 8 Integral expansion vessel pre charge pressure bar 0 75 0 75 Lift weight Combi boiler kg 43 43 System boiler kg 42 42 Total weight inc packaging Combi boiler kg 48 48 System bo...

Page 7: ...Condensate drain Plastic pipe 722 mm B Heating flow 722 mm C DHW 715 mm D Gas connection Rp E Cold water 715 mm F Heating return 722 mm G Safety valve drain 715 mm Technical Specification cont 7 Preparing for installation 5862 670 GB Installation ...

Page 8: ...n Plastic pipe 722 mm B Heating flow 722 mm C DHW cylinder flow 722 mm D Gas connection Rp E DHW return 722 mm F Heating return 722 mm G Safety valve drain 715 mm Technical Specification cont 8 Preparing for installation 5862 670 GB ...

Page 9: ...li ance is supplied complete with a stan dard concentric horizontal balanced flue terminal assembly suitable for flue lengths of up to 620 mm from the centre of the flue outlet which equates to wall thicknesses of up to 480 mm for rear flues and 463 mm for side flues including minimum clear ances Extension ducts can be used to increase the straight flue length up to 6 m and include one 87 elbow Te...

Page 10: ...m B Flue outlet ventilation pipe can be shortened as necessary Concentric Vertical Flue System The vertical flue kit optional extra with extensions may be used for up to10 m applications An extra 87 elbow can be used but this reduces the maximum permissi ble length by 1 m An extra 45 elbow can be used but this reduces the max imum permissible length by 0 5 m Technical Specification cont 10 Prepari...

Page 11: ...determine which optional extension kits are required if any A Combined length of flue outlet ventilation pipe max 10 m B Flue outlet ventilation pipe can be shortened as necessary Technical Specification cont 11 Preparing for installation 5862 670 GB Installation ...

Page 12: ...Elbows and extensions Extension Elbow 87 Elbow 45 Technical Specification cont 12 Preparing for installation 5862 670 GB ...

Page 13: ...r A Boiler B heat exchanger C circulation pump D Three way diverter valve E Plate heat exchanger F DHW outlet G Cold water inlet H Heating circuit Technical Specification cont 13 Preparing for installation 5862 670 GB Installation ...

Page 14: ...System boiler A DHW cylinder B Boiler C heat exchanger D circulation pump E Three way diverter valve F Heating circuit Technical Specification cont 14 Preparing for installation 5862 670 GB ...

Page 15: ... Requirements Statutory Requirements Gas safety installation and use regulations current issue It is in your own interest and safety to ensure that the law is complied with Technical Specification cont 15 Preparing for installation 5862 670 GB Installation ...

Page 16: ...Man or appliances out of the scope of Building Regulations to the homeowner which will confirm that the work has been carried out by a competent CORGI Registered Instal ler This document will be used to form part of the Home Information Pack HIP that becomes a require ment from January 2007 in order to sell your house Important information Manufacturers instructions must not be taken in any way as...

Page 17: ...erson using the bath or shower Attention is drawn to the requirements of BS 7671 the cur rent I E E Wiring Regulations and in Scotland the electrical provisions of the Building Regulations applic able in Scotland A compartment used to enclose the appliance must be designed and constructed specifically for this pur pose An existing cupboard or com partment may be used provided it is modified accord...

Page 18: ...al drain or soil pipes 150 f From internal and external corners 300 g Above adjacent ground or balcony level roof 300 h From a surface facing the terminal 600 i Facing terminals 1200 j From opening door window in carport into dwelling 1200 k Vertically from a terminal on same wall 1500 l Horizontally from a terminal on same wall 300 m Adjacent to opening 300 n Below carport roof 200 Installation R...

Page 19: ...ion Detailed recommendations for flue installation are given in BS 5440 1 The following notes are for general guidance The boiler must be installed so that the terminal is exposed to external air It is important that the position of the terminal allows free passage of air across it at all times Installation Requirements cont 19 Preparing for installation 5862 670 GB Installation ...

Page 20: ...erminal is fitted within 850 mm of a plastic or painted gut ter or 450 mm of painted eaves an aluminium shield at least 750 mm long must be fitted to the underside of the painted surface The air inlet flue outlet duct must not be closer than 25 mm to com bustible material Due to the high efficiency of the boi ler the terminal may emit a plume of vapour This is normal but positions where this would...

Page 21: ...internal filling loop the internal filling loop is only for topping up Combination boiler Note The boiler incorporates an internal bypass to ensure adequate water flow Cer tain thermostatic radiator valve manufacturers may require that a bypass valve is fitted in addition to the integral by pass Specifications as to the individual requirements should be sought prior to installation Installation Re...

Page 22: ...A Radiators B Boiler C Lockshield valve D CH flow E CH return F Drain cock at lowest point in the system G Hot water taps Installation Requirements cont 22 Preparing for installation 5862 670 GB ...

Page 23: ...room temperature control DHW cylinder control LR Connection of room temperature control LS Connection of DHW cylinder con trol The following Viessmann control configurations are available Constant temperature Timer with constant temperature Vitotrol 100 UTD The boiler requires a permanent live feed via plug 40 System boiler Cylinder connected directly to boiler Note The boiler incorporates an inte...

Page 24: ...A Radiators B Boiler C DHW Cylinder D Lockshield valve E CH flow F CH return G Drain cock at lowest point in the system Installation Requirements cont 24 Preparing for installation 5862 670 GB ...

Page 25: ...ontrol LS Connection of DHW cylinder con trol The following Viessmann control configurations are available Constant temperature Timer with constant temperature Vitotrol 100 UTD The boiler requires a permanent live feed via plug 40 The DHW cylinder must have an integrated temperature control con nected to the Vitodens 100 The DHW will always take priority over the central heating when timed demand ...

Page 26: ...e current issues of BS 5449 and BS 6798 Note If the pressure gauge rises by 1 5 bar when the appliance is at maximum temperature with all radiators in circu lation an extra expansion vessel is required Vessel charge and initial system pressure bar 0 5 1 0 1 5 psi 7 3 14 5 21 5 Total water content of system using 8 litre capacity expansion vessel supplied with appliance litres 106 75 42 gallons 23 ...

Page 27: ...tion relating to fittings e g showers washing machines etc suitable for connec tion in the DHW circuit consult the Local Water Authority However the following information is given for guidance Domestic hot cold water supply taps and mixing taps All equipment designed for use at mains water pressure is suitable Showers and bidets Any mains pressure shower or bidet complying with the Local Water Aut...

Page 28: ...ble 16 Warning This Appliance must be earthed Failure to provide a satis factory earth connection would be a safety hazard and may also result in appliance malfunction The method of connection to the mains supply must facilitate com plete electrical isolation of the appli ance Either a 3A fused three pin plug and unswitched shuttered socket outlet both complying with BS 1363 or a 3A fused double p...

Page 29: ...2 screws Installation template System boiler Boiler assembled 3 shut off valves 2 connection elbows Wall mounting fixture 2 wall plugs and 2 screws Installation template Wall mounting bracket installation Important Before installing the appliance check that the chosen position is sui table adequate installation clearances are available and that the requirements for flue terminal position are satis...

Page 30: ... the minimum slope of 3 5mm m towards the boiler 1 Position the installation template on the wall 2 Mark wall plug holes and balanced flue pipe opening Preparations for boiler installation cont 30 Preparing for installation 5862 670 GB ...

Page 31: ...mensions on page 7 1 Prepare the water connections Flush the heating system 2 Prepare gas connection to BS 6891 3 Prepare the electrical connections Mains cable H05V2V2 F 3 G 1 0 mm2 230 V 50 Hz A 1 5m power cable is part of the standard delivery Accessory cables H05V2V2 F 3 G 1 0 mm2 for connection of room temperature control and DHW cylinder control system boiler Preparations for boiler installa...

Page 32: ...fore mounting the boiler 1 Remove the screw at the top of the boiler 2 Press down the springs on the underside of the boiler and remove the front panel 3 Hook the boiler on to the wall mounting frame Installing the boiler and making all connections 32 Installation 5862 670 GB ...

Page 33: ...inlet connection on the gas cock A Upon completion tighten the union connection 2 Carry out a gas soundness test 3 Purge the gas supply pipe Installing water fittings Combi boiler Installing the boiler and making all connections cont 33 Installation 5862 670 GB Installation ...

Page 34: ...eturn 722 mm System boiler For operation without a DHW cylinder shut off connections B and D A Heating flow 722 mm B DHW cylinder flow 722 mm C Gas connection BSP D DHW return 722 mm E Heating return 722 mm Installing the boiler and making all connections cont 34 Installation 5862 670 GB ...

Page 35: ...e window or any type of public access area The pipe must be routed to a position so that any discharge of water possi bly boiling or steam cannot create any danger to persons damage to property or external electric compo nents and wiring The point of dis charge must be clearly visible To ease future servicing it is advisable to use a compression type fitting to extend the discharge pipe Installing...

Page 36: ...run should take the shortest practical route with a downward slope of at least 2 5 4 5 mm m The external pipework should be insulated to prevent freezing The pipework should terminate as close as possible to the ground or drain whilst still allowing the condensate to safely disperse The condensate pipe must be of non corrosive material preferably plastic Note ferrous materials or copper must not b...

Page 37: ... direct into gully below ground but above water level Terminating into an external waste system A 722 mm plastic condensate pipe B External length of pipe 3 m max C Open end direct into gully below ground but above water level Installing the boiler and making all connections cont 37 Installation 5862 670 GB Installation ...

Page 38: ...e rainwater system A 722 mm plastic condensate pipe B Internal soil and vent stack Filling the siphon with water Fill a minimum of 0 3 l of water into the boiler connect kit flue outlet Important information At initial start up flue gas may be emitted from the condensate drain Fill the siphon with water before start up Installing the boiler and making all connections cont 38 Installation 5862 670 ...

Page 39: ...e terminal into the wall outlet 3 Secure the wall bezel internally 4 Connect external flue terminal to pipe bend Install flue and supply pipes accordingly with a minimum of 3 slope ca 50 mm m towards the boiler 5 Secure the wall bezel externally Flue outlet 39 Installation 5862 670 GB Installation ...

Page 40: ...inal C33x 1 Install the universal roof tile 2 Install flue and supply pipes accordingly 3 Push roof terminal through roof and insert into flue supply pipe 4 Seal roof terminal Flue outlet cont 40 Installation 5862 670 GB ...

Page 41: ...Opening the control unit housing Electrical connections 41 Installation 5862 670 GB Installation ...

Page 42: ... also observe the separate installation instruc tions provided Notes regarding the connection of room temperature and DHW cylinder temperature control For more information about the connection of on site temperature controls see page 21 Electrical connections cont 42 Installation 5862 670 GB ...

Page 43: ...e of 3 A gH Mains connection accessories room temperature control DHW cylinder control black plug A Room temperature control with zero volt contact e g Vitotrol 100 UTD If making the connection between L and LR remove jumpergH LR Connection of room temperature control Vitotrol 100 UTA Vitotrol 100 UTD If making the connection between L and LR remove jumper LS Connection of DHW cylinder con trol El...

Page 44: ...Connect DHW cylinder temperature control Connect Vitotrol 100 A Vitotrol 100 UTD B Vitotrol 100 UTA C When connecting remove link Electrical connections cont 44 Installation 5862 670 GB ...

Page 45: ...damaged if they touch hot components When routing and securing connecting cables on site ensure that the maximum permissible cable temperatures are not exceeded A Low voltage connections B 230 V connections Electrical connections cont 45 Installation 5862 670 GB Installation ...

Page 46: ...nstallation 1 Hang the front panel to the wall mounting frame by the appropriate hook 2 Press down the front panel at the bottom 3 Insert the screw at the top of the boiler Note The outer case forms a seal with the combustion box It must there fore be securely fitted with the screw provided Electrical connections cont 46 Installation 5862 670 GB ...

Page 47: ...a the radiator valves and system air vents in accordance with normal practice close all air vents and check for system soundness Drain the entire system to flush out any debris Additives from the approved list below may be used The use of non approved additives will invalidate the warranty on this product Anti scaling Sentinel X200 Anti bacterial System Cleaner Fernox Sentinel X300 Anti freeze Gly...

Page 48: ...table quality Soften fill water harder than 150 ppm temporary hardness Inhibitors or antifreeze additives suitable for heating systems should be injected or added manually 1 Close the gas shut off valve 2 Only when operating with DHW cylinder Prevent heat demand from the DHW cylinder 3 Switch on mains supply and turn rotary selectors tr and tw counter clockwise to the end stop Note The display wil...

Page 49: ... that most of the air has been removed from all drain and vent points on the system 7 Turn on valve B toggle to the rear to allow water into the boiler and at the same time turn valve A to the draining position toggle to the front with the drain toggle open a jubilee type clip will ensure no water loss an secure the hose in place on the drain point 8 Fill heating system minimum sys tem pressure 1 ...

Page 50: ... bar 4 Turn valve A to open position toggle to rear 5 Turn on the appliance to circulate the pump in both DHW and CH positions in order to continue vent ing Continue venting and reverse the filling procedure if required Note It is essential that there is no air in the heat exchanger and the system prior to firing the appliance This will caus en F1 fault and prevent you finishing the installation w...

Page 51: ...lling the Domestic Hot Water Circuit Combi boiler only 1 Open the DHW inlet valve A and outlet valve B 2 Open all DHW taps in turn to vent any air from the DHW pipework Checking static and supply pressure Danger CO formation as a result of incorrect burner adjustment can lead to severe health problems Carry out a CO test prior to and after work on gas equipment Commissioning and testing cont 51 In...

Page 52: ...the boiler can enter a fault state because of airlocks in the gas pipe To reset press U key The ignition procedure will then be repeated 6 Check the inlet working pressure 20 mbar Minimum working pressure 12 mbar Maximum working pressure 20 mbar Note Use suitable test equipment with a resolution of at least 0 5 mbar to measure the supply pressure 7 Shut down the boiler close the gas shut off valve...

Page 53: ...ed at the boiler flue adaptor testpoint Checking CO2 levels is not a requirement Subject to the Wobbe index the CO2 content fluctuates between 7 4 and 10 5 If the actual CO2 value deviates from the stated ranges by more than 1 check the balanced flue system for leaks 1 Connect a flue gas analyser at flue gas connector A on the flue outlet 2 Open the gas shut off valve com mission the boiler and cr...

Page 54: ...ervice report 6 Select the lower rated output Turn rotary selector tr to the left control range 7 Check the CO2 content Should the actual value deviate by more than 1 from the above range check the seals in the balanced flue sys tem 8 Enter actual values into the service report 9 Once checked turn the rotary selector tr less than 3 s to the right to the end stop and back again into the control ran...

Page 55: ...ut via the modulation range 1 Switch OFF the mains power 2 Unhook the front of the control unit and flip down 3 Start up the boiler and at the poten tiometer A select the maximum boiler output Check the adjust ment for the corresponding gas throughput 4 Flip up the control unit front and snap into position Domestic hot water flow rate and temperature Combi boiler only A flow regulator is fitted to...

Page 56: ...r tr to the desired DHW temperature The display shows r the set tem perature is shown Final checks 1 If a time switch has been built into the control unit Set required activation periods as per the time switch operating instructions Time switch operating instructions 2 Fill in the relevant details for the installation in the benchmark log book supplied in the instructions pack and affix the self a...

Page 57: ...effi cient use of the system including the use and adjustment of all sys tem controls for both DHW and CH Advise the user of the precautions necessary to prevent damage to the system and to the building in the event of the system remaining inop erative during frost conditions Explain the function of the boiler safety controls and how to reset them Emphasise that if cut out per sists the boiler sho...

Page 58: ...GI registered person The boiler incorporates a flue sampling point in front of the flue outlet The flue gases can be analysed if required The push fit cap may be removed and a sam ple tube fitted The push fit cap must be replaced after use The flue gas sample will enable the service engineer to judge whether any major action is required Before commencing any service operation isolate the mains ele...

Page 59: ...anel from the wall mounting frame Burner removal 1 Switch OFF the mains power 2 Close the gas shut off valve and safeguard against reopening 3 Pull electrical cables from fan motor A gas train B and ignition unit E 4 Remove connection hose from air pressure switch D Routine Servicing Instructions cont 59 Service Instructions 5862 670 GB Service ...

Page 60: ...prevent damage never rest the burner on the gauze assembly Check the burner gasket and burner gauze assembly for damage Check the burner gasket A for damage and replace if necessary Replace the burner gauze assembly if it is damaged Routine Servicing Instructions cont 60 Service Instructions 5862 670 GB ...

Page 61: ...secure a new burner gauze assembly D with a new gasket E Torque 3 5 Nm approx 5 Refit the thermal insulation ring C 6 Refit the electrode B Torque 2 5 Nm approx Checking and adjusting the ignition and ionisation electro des A Ignition and ionisation electrode 1 Check the electrode for wear and contamination Routine Servicing Instructions cont 61 Service Instructions 5862 670 GB Service ...

Page 62: ...e together with new gaskets Tighten the electrode fixing screws 2 5 Nm approx Cleaning the heating surfaces If required clean heating surfaces A with a brush or flush with water Important information Scratches on parts which are in contact with flue gases can lead to corrosion Only use plastic brushes and NOT wire brushes Routine Servicing Instructions cont 62 Service Instructions 5862 670 GB ...

Page 63: ...rain 2 Place an appropriate container under the siphon A 3 Remove the locking cap B and drain the siphon content 4 Replace the locking cap B 5 Fill the siphon A with water by pouring about 0 3l of water into the combustion chamber Routine Servicing Instructions cont 63 Service Instructions 5862 670 GB Service ...

Page 64: ...e fittings on the gas connection pipe B 3 Insert air pressure switch connec tion pipe C onto the gas valve OUT connector 4 Replace electrical cables from fan motor D gas valve E and igni tion unit E 5 Open gas shut off valve and switch on the mains Routine Servicing Instructions cont 64 Service Instructions 5862 670 GB ...

Page 65: ...connections for leaks Checking diaphragm expansion vessel and system pressure Note Carry out this test on a cold system 1 Empty the system until a pressure of 0 is displayed Note To view the operating pressure turn rotary selectors tr and tw counter clockwise to the end stop Routine Servicing Instructions cont 65 Service Instructions 5862 670 GB Service ...

Page 66: ...let pressure of the diaphragm expansion vessel Max operating pressure 3 bar Min operating pressure 1 0 bar Topping up heating water via the filling loop combi boiler only 1 Turn both rotary selectors tr and tw counter clockwise to the end stop The display shows the operating pressure 2 Open shut off valve A secondary side 3 Slowly open the shut off valve B primary side and top up with water 4 Afte...

Page 67: ...ections Checking static and supply pressure See page 51 Front panel installation 1 Hang the front panel to the wall mounting frame by the appropriate hook 2 Press down the front panel at the bottom Routine Servicing Instructions cont 67 Service Instructions 5862 670 GB Service ...

Page 68: ...nce in both central heating and DHW modes Checking the CO2 settings See page 53 Checking all gas equipment for soundness at operating pres sure Danger Escaping gas leads to a risk of explosion Check gas equipment for soundness Final checks 1 Check that the flue terminal in is good condition and clear of any obstructions 2 Return all appliance and external controls if fitted to their original setti...

Page 69: ...in ary electrical system safety checks On completion of any service or fault finding operation involving making or breaking electrical connections always check for earth continuity polarity and resistance to earth Function sequence and possible faults Display screen Remedy Control unit is sues heat de mand No Increase set value and ensure heat is drawn off Yes Fan starts No after approx 51 s Check...

Page 70: ... F4 Yes Ionisation cur rent builds higher than 2 µA No Fault Check the ionisa tion current check the electrode ad justment and the gas pipe for air locks Symbol A F4 Yes Burner in opera tion Stops below set boiler tempera ture and restarts Check flue gas system for sound ness flue gas re circulation check gas flow pressure Fault finding cont 70 Troubleshooting 5862 670 GB ...

Page 71: ...ng Draw off tempera ture sensor short circuit Check sensors see page 78 59 No DHW heat ing Draw off tempera ture sensor short circuit Check sensors see page 78 b1 Control mode Communication fault program ming unit internal Check connections and replace the programming unit if necessary b5 Control mode Internal fault Replace control unit E4 Burner blocked Fault supply vol tage Replace control unit ...

Page 72: ...e check the gas combination valve igni tion ignition module and condensate drain Press Reset F5 Burner blocked Air pressure switch faulty Check the air pressure switch and the intercon necting cable F7 Burner blocked Faulty water pres sure sensor Check the water pres sure sensor and the in terconnecting cable F8 Burner in fault state Fuel valve closes too late Check gas combination valve Check bot...

Page 73: ...on elec trodes and leads Check whether a strong interfer ence EMC field exists near the equipment Press Reset If the fault is not re moved replace the con trol unit FE Burner blocked Faulty main PCB Switch OFF the control unit if the equipment will not restart Fault finding cont 73 Troubleshooting 5862 670 GB Service ...

Page 74: ...s down the springs on the underside of the boiler and remove the front panel 3 Lift the front panel from the wall mounting frame Drain boiler on the primary side Note For certain repairs the boiler must be drained on the primary side Repairs 74 Troubleshooting 5862 670 GB ...

Page 75: ...e on the shut off valve C to the front 4 Turn toggle on the valve A to the front and drain the boiler if neces sary Turn toggle back down again Note Residual water left in the boiler 5 Turn toggle on the shut off valve B to the front Note Filling up on the primary side see page 48 Repairs cont 75 Troubleshooting 5862 670 GB Service ...

Page 76: ...sistance and compare actual values with the curve 3 In case of severe deviation drain boiler on the primary side see page 74 and replace the sensor Danger The boiler temperature sen sor is immersed in the heat ing water risk of scalding Drain the boiler before repla cing the sensor Repairs cont 76 Troubleshooting 5862 670 GB ...

Page 77: ...eck the temperature limiter 1 Pull the leads from temperature lim iter A 2 Check the continuity of the tem perature limiter with a multimeter 3 Remove faulty temperature limiter 4 Coat the replacement temperature limiter with heat conducting paste and install 5 To reset press Reset key on the control unit Repairs cont 77 Troubleshooting 5862 670 GB Service ...

Page 78: ...r A 2 Check the sensor resistance and compare actual values with the curve 3 Replace the sensor in case of severe deviation Note Water can leak out when replacing the outlet sensor Close the cold water shut off valve Drain DHW pipe and plate heat exchanger secondary side Repairs cont 78 Troubleshooting 5862 670 GB ...

Page 79: ...safeguard against reopening 3 Drain the boiler from the secondary side 4 Pivot the control unit downwards 5 Release the ties A and screwsB 6 Remove the flow switch C connec tor 7 Replace flow limiter D 8 Refit the flow switch C connector Repairs cont 79 Troubleshooting 5862 670 GB Service ...

Page 80: ...primary side see page 74 4 Flip down control unit 5 Remove two screws A at the plate heat exchanger and B remove Note During removal small amounts of water may trickle out and escape from the removed plate heat exchanger 6 Check the secondary side for con tamination and if necessary clean or replace the plate heat exchan ger 7 Check the primary side for contami nation and if necessary clean or rep...

Page 81: ...ure that fixing holes and seals are aligned Install the heat plate exchanger the correct way round Checking the fuse 1 Switch OFF the mains power 2 Flip down control unit 3 Remove cover A 4 Check fuse F1 Repairs cont 81 Troubleshooting 5862 670 GB Service ...

Page 82: ...A1 Main PCB A2 Programming unit Connection and wiring diagrams combi boiler 82 Designs 5862 670 GB ...

Page 83: ...r diverter valve dG Gas solenoid valve fÖ Mains input 230V 50Hz fJ Temperature limiter gH Mains connection accessories room temperature control a ÖA Fan aCA Air pressure switch aVL Flow switch aND Water pressure sensor Connection and wiring diagrams combi boiler cont 83 Designs 5862 670 GB Service ...

Page 84: ...A1 Main PCB A2 Programming unit Connection and wiring diagram system boiler 84 Designs 5862 670 GB ...

Page 85: ...alve dG Gas solenoid valve fÖ Mains input 230V 50Hz fJ Temperature limiter gH Mains connection accessories room temperature control DHW cylinder control a ÖA Fan aCA Air pressure switch aND Water pressure sensor Connection and wiring diagram system boiler cont 85 Designs 5862 670 GB Service ...

Page 86: ...n ger 1 023 Filling Loop 1 024 Filling Loop connecting cable 1 025 Pipe clip 718 mm 1 026 Quick air vent valve cartridge 027 Safety valve 028 Water pressure sensor 029 Flow switch 1 030 Step motor cartridge 031 Circulation pump 032 Bypass with overflow valve 033 Grommets 034 Gaskets set 035 Spring clips set 036 Flow limiter 037 Hydraulic 040 Lip seal 7 60 mm 041 Ventilation seal 7 100 mm 050 Burne...

Page 87: ...e harness 100 35 54 093 Step motor connecting cable 094 Mains power switch cable har ness 095 Gas valve connecting cable 35 096 Ignition transformer ionisation connecting cable 300 Touch up spray paint Vitowhite 301 Touch up paint stick Vitowhite A Data plate Parts lists cont 87 Parts lists 5862 670 GB Service ...

Page 88: ...Parts lists cont 88 Parts lists 5862 670 GB ...

Page 89: ...Parts lists cont 89 Parts lists 5862 670 GB Service ...

Page 90: ...Parts lists cont 90 Parts lists 5862 670 GB ...

Page 91: ...Parts lists cont 91 Parts lists 5862 670 GB Service ...

Page 92: ... 90 396 EEC EN 297 89 336 EEC EN 483 73 23 EEC EN 625 92 42 EEC EN 677 EN 50 165 EN 60 335 as follows EN 61 000 3 2 _ 0085 EN 61 000 3 3 EC Declaration of conformity by an authorised body according to EMVG article 10 2 Certificate number E9 02 08 1730 This product complies with the requirements of the Efficiency Directive 92 42 EEC for Condensing boilers Allendorf 14 01 05 Viessmann Werke GmbH Co ...

Page 93: ...sages 71 Fill the system 49 Final checks 56 Flow limiter 79 Flue outlet 39 Function sequence 69 Fuse 81 G Gas combination valve 52 Gas connection 33 Gas Supply 27 Gas supply pressure 52 General Information 5 H Horizontal Flue System 9 I Ignition electrode 61 Installing fittings 33 M Mains connection 42 Mounting boiler 32 O Outlet temperature sensor 78 P Plate heat exchanger 80 R Removing front pan...

Page 94: ...V Venting 50 Vertical Flue System 10 W Wall mounting bracket installation 29 Keyword index cont 94 Keyword index 5862 670 GB ...

Page 95: ...95 5862 670 GB ...

Page 96: ...rial no from serial no 7179 917 5 00001 7179 918 5 00001 8 to 30 kW from serial no 7179 916 5 00001 96 Printed on environmentally friendly chlorine free bleached paper 5862 670 GB Subject to technical modifications Viessmann Limited Hortonwood 30 Telford TF1 7YP GB Telephone 44 1952 675000 Fax 44 1952 675040 www viessmann com ...

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