Viessmann F11T Installation And Service Instructions For Contractors Download

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Arrangement of excess export system when con-
nected into a sub-distribution board

RCD

400V / 230V~

kWh

Fig. 7

Vitovalor PT2

Fuel cell module ON/OFF switch

Gas condensing module ON/OFF switch

Control unit, gas condensing module

Internal circulation pump

Internal consumers

GS protection

Sub-distribution board

On-site consumers

Meter cupboard

Property boundary

Low voltage grid

Inverter (DC/AC converter) S

EMAX

= 0.75 kVA

Fuel cell stack

S1 Bidirectional energy management meter (not rele-

vant for billing by the grid operator)

Z1 Balancing bidirectional meter
Z2 Export meter (standard delivery on Vitovalor PT2)

Arrangement of excess export when connected
into a main LV distribution board

RCD

kWh

AC 400V / 230V~

kWh

Fig. 8

Vitovalor PT2

Fuel cell module ON/OFF switch

Gas condensing module ON/OFF switch

Control unit, gas condensing module

Internal circulation pump

Internal consumers

GS protection

Meter cupboard

On-site consumers

Property boundary

Low voltage grid

Inverter (DC/AC converter) S

EMAX

= 0.75 kVA

Fuel cell stack

S1 Bidirectional energy management meter (not rele-

vant for billing by the grid operator)

Z1 Balancing bidirectional meter
Z2 Export meter (standard delivery on Vitovalor PT2)

Preparing for installation

Notes on connecting to the mains supply

(cont.)

5853335

Installation

Summary of Contents for F11T

Page 1: ...r contractors VIESMANN Vitovalor PT2 Type F11T F19T F25T F32T 0 9 to 30 8 kW Fuel cell based micro CHP unit with integral gas condensing boiler and adjacent cylinder module Natural gas version VITOVALOR PT2 5853335 GB 10 2019 Please keep safe ...

Page 2: ... system installer or a qualified per son authorised by the installer Regulations to be observed National installation regulations Statutory regulations for the prevention of accidents Statutory regulations for environmental protection Codes of practice of the relevant trade associations Relevant country specific safety regu lations Safety instructions for working on the system Working on the syste...

Page 3: ...ase note Repairing components that fulfil a safety function can compromise the safe operation of the system Replace faulty components only with genuine Viessmann spare parts Auxiliary components spare and wearing parts Please note Spare and wearing parts that have not been tested together with the system can compromise its func tion Installing non authorised com ponents and making non approved mod...

Page 4: ...ater escapes from the appliance there is a risk of scalding Never touch hot heating water Condensate Danger Contact with condensate can be harmful to health Never let condensate touch your skin or eyes and do not swallow it Flue systems and combustion air Ensure that flue systems are clear and cannot be sealed for instance due to accumulation of condensate or other external causes Ensure an adequa...

Page 5: ...nces that exhausts air to the outside can result in life threatening poisoning due to a reverse flow of flue gas Fit an interlock circuit or take suita ble steps to ensure an adequate supply of combustion air Safety instructions Safety instructions cont 5853335 ...

Page 6: ... accessories on left right of the cylinder module 29 Further installation on the cylinder module 34 Aligning the cylinder module at the installation site 34 Detaching the front panels of the gas condensing and fuel cell mod ules 36 Removing the cylinder module front panel 37 Removing the module connection lines 38 Heating water and DHW connections 39 Safety assembly to DIN 1988 and EN 806 at the c...

Page 7: ...g operating condition 110 Checking grid monitoring parameters 111 Removing the SD card 111 Inserting the SD card and saving the fuel cell module data 112 7 Troubleshooting Fault display and other messages on the programming unit 113 Fault messages on the gas condensing module fuel cell module pro gramming unit 115 Service messages 135 Warnings 136 Repairs 136 Moving the programming unit to the ser...

Page 8: ...5 Mains distributor box 156 Connection scheme heat management unit gas condensing module 157 Burner control unit connection scheme 159 Electronics module M2IO connection scheme cylinder module 160 10 Commissioning service reports 162 11 Specification 163 12 Disposal Final decommissioning and disposal 164 13 Certificates Declaration of conformity 165 Manufacturer s certificate according to the 1st ...

Page 9: ...dentified as follows Symbol Meaning Steps required during commissioning Not required during commissioning Steps required during inspection Not required during inspection Steps required during maintenance Not required during maintenance Intended use The appliance is only intended to be installed and operated in sealed unvented heating systems that comply with EN 12828 with due attention paid to the...

Page 10: ... dam age due to corrosion Do not install or operate the Vitovalor PT2 in unheated rooms Minimum temperature inside the installation room 3 C Vitovalor PT2 in systems with photovoltaic and solar thermal equipment It is not possible to operate the Vitovalor PT2 in con junction with a solar thermal system This would reduce the runtimes of the Vitovalor PT2 and economi cally efficient operation would ...

Page 11: ...ge to the appliance during han dling Never set the appliance down on its front or sides or apply any load to these surfaces If space constraints make it necessary the gas condensing and fuel cell module can be split for handling See page 52 for an illustration of the necessary measures Siting Dimensions of siting options Install the Vitovalor so that one side of the cylinder module is accessible f...

Page 12: ... left of the gas condensing and fuel cell module 1800 185 475 1205 595 1240 1310 1829 1979 3 1979 3 A Fig 2 A Wiring area Note Height of balanced flue terminal including balanced flue pipe 1000 mm in length Preparing for installation Siting cont 5853335 Installation ...

Page 13: ...ndensing and fuel cell module 1979 1800 125 185 595 1240 1310 1829 1979 3 3 1205 A Fig 3 A Wiring area Note Height of balanced flue terminal including balanced flue pipe 1000 mm in length Preparing for installation Siting cont 5853335 Installation ...

Page 14: ... area Preparing for installation Use a connection set available as an accessory to make the connections on the water side Fitting accessories Before final siting attach all of the accessories that are to be mounted from the back of the boiler e g connec tion set Please note Avoid damaging the appliance Connect all pipework free of load and torque stress Preparing connections on site Connection set...

Page 15: ... the necessary fall B Clearance for connections on the water side C Clearance for condensate drain pipe connection Note All height dimensions have a tolerance of 15 mm on account of the adjustable feet Preparing for installation Preparing for installation cont 5853335 Installation ...

Page 16: ... of 15 mm on account of the adjustable feet 1 Prepare the connections on the heating water side Thoroughly flush the heating system Note Fit the on site expansion vessel if required to the heating return 2 Prepare the connections on the DHW side Install the safety assembly accessories or on site provi sion in the cold water line to DIN 1988 and EN 806 see page 40 Recommendation Install the safety ...

Page 17: ...nnection ordinances as well as supplementary conditions of the relevant grid operator Any applicable statutory or local regulations Notify the local grid operator before commissioning the Vitovalor PT2 We recommend you contact the local grid operator prior to installation and clarify any techni cal points as well as the acceptance procedure Hand the relevant application forms as per VDE AR N 4105 ...

Page 18: ...idirectional meter Z2 Export meter standard delivery on Vitovalor PT2 Arrangement of excess export when connected into a main LV distribution board RCD RCD kWh Z1 L AC 400V 230V M K H kWh Z2 1 F G E kWh S1 O N B C A D Fig 8 A Vitovalor PT2 B Fuel cell module ON OFF switch C Gas condensing module ON OFF switch D Control unit gas condensing module E Internal circulation pump F Internal consumers G G...

Page 19: ...stomer G Power distribution H On site consumers K Short circuit protection L Overload protection RCD M Vitovalor PT2 N GS protection O Inverter DC AC converter SEMAX 0 75 kVA P Fuel cell S1 Bidirectional energy management meter not rele vant for billing by the grid operator Z1 Balancing bidirectional meter observe meter cir cuit Z2 Export meter standard delivery on Vitovalor PT2 Preparing for inst...

Page 20: ...rotection L Overload protection RCD M Vitovalor PT2 N GS protection O Inverter DC AC converter SEMAX 0 75 kVA P Fuel cell U Power storage system inverter V Power storage unit S1 Bidirectional power storage management meter power storage system standard delivery S2 Bidirectional energy management meter not rele vant for billing by the grid operator Z1 Balancing bidirectional meter observe meter cir...

Page 21: ...r F Customer G Power distribution H On site consumers K Short circuit protection L Overload protection RCD M Vitovalor PT2 N GS protection O Inverter DC AC converter SEMAX 0 75 kVA P Fuel cell R GS protection for PV system S PV inverter T Photovoltaic system S1 Bidirectional energy management meter optional not relevant to billing by the grid operator Z1 Balancing bidirectional meter observe meter...

Page 22: ...er generation Z3 Export meter for power generation by Vitovalor PT2 standard delivery with Vitovalor PT2 Z4 Export meter for Vitovalor PT2 alone Preparing for installation Notes on connecting to the mains supply cont 5853335 Installation ...

Page 23: ... N PE kWh S1 U V kWh S2 kWh Fig 12 A Low voltage grid B Main power supply C Domestic distribution box D Property boundary E Grid operator F Customer G Power distribution H On site consumers K Short circuit protection L Overload protection RCD M Vitovalor PT2 N GS protection O Inverter DC AC converter SEMAX 0 75 kVA P Fuel cell Preparing for installation Notes on connecting to the mains supply cont...

Page 24: ...e required We recommend installing an AC DC sensitive RCD RCD class B for DC fault currents that can occur with energy efficient equipment The Vitovalor PT2 must not be installed in the same final consumer circuit as other consumers Please note Switching off by means of an emergency stop switch for the heating system can damage the appliance Remove any emergency stop switches from the existing hea...

Page 25: ...f RCD F used to protect the Vitovalor PT2 Adjust the activation times of both RCDs connected in series in such a way that the disconnection time of RCD F is less than the shortest disconnection time for RCD A Both conditions ensure RCD F for the Vitovalor PT2 responds earlier than upstream RCD A l in A t in s A F Fig 14 Response characteristics of the residual cur rent devices Preparing for instal...

Page 26: ...e arranged as follows 2 pipes outside Copper pipe 2 pipes inside Corrugated stainless steel pipe 8 Fit the supplied edge protector on the middle open ing towards the cylinder module Feed the cable with plug through the opening with edge protection towards the outside Power cable bundled at the back Depending on the position of the power cable provided by the customer feed the power cable out of th...

Page 27: ...d fuel cell module 2 1 1 2 3 8 6 5 4 7 180 Fig 17 Note Pull the hoses out of the appliance far enough to pre vent unnecessary bends inside the appliance Connecting hoses to the on site waste water pipe See page 41 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 28: ...28 Aligning the gas condensing and fuel cell module at the installation site 4x Fig 18 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 29: ...29 Fitting the surface mounting connection set accessories on left right of the cylinder module Fig 19 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 30: ... 4 6 3 2 1 4x Fig 20 Note If ordered as accessories Fit the wiring chamber set DHW circulation pump at the same time Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 31: ...31 4 2 1 3 3 2 1 4 Fig 21 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 32: ...32 Connections to the right 1 4x24 Nm 7 Nm 3 2 Fig 22 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 33: ...33 Connections to the left 3 4x24 Nm 2 1 7 Nm Fig 23 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 34: ...aBH out of the cylinder module Insert cables at the back of the gas condensing and fuel cell module 4 Stick the spacer to the corners and in the middle of the side panel Aligning the cylinder module at the installation site Fitting accessories Check prior to the final positioning whether all acces sories mounted from the back have been added E g connection set and if available DHW circulation con ...

Page 35: ...35 4x Fig 25 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 36: ...s condensing and fuel cell modules 9 7 6 4 2 1 3 5 8 Fig 26 Note Hook in the programming unit mounting bracket in the maintenance position See page 57 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 37: ...37 Removing the cylinder module front panel 2 3 1 Fig 27 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 38: ...oving the module connection lines Cylinder module to the left of the gas condensing and fuel cell module 8x 8x Fig 28 Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 39: ...module 8x 8x Fig 29 Heating water and DHW connections A B C D E A B C D E F F Fig 30 A Heating return R B Cold water R C DHW circulation R D DHW R E Heating flow R F Pressure gauge Installation sequence Installing and aligning the Vitovalor PT2 cont 5853335 Installation ...

Page 40: ...ith constant fall and in a frost free environment Balanced flue terminal Connecting the downstream balanced flue pipe Route all horizontal sections of the flue pipe with a constant fall of 3 Flue system installation instructions Note Only use the System certificate and Skoberne GmbH flue system labels in conjunction with the Viessmann flue system made by Skoberne Do not carry out commissioning unt...

Page 41: ...the gas connections for leaks Also check the line to the fuel cell module Note Only use suitable and approved leak detection agents EN 14291 and devices for the tightness test Leak detection agents with unsuitable constit uents e g nitrides sulphides can cause material damage Remove residues of the leak detection agent after testing Please note Excessive test pressure can damage the appliance Max ...

Page 42: ...such as heating or water pipes to dis charge static loads Electrical connections 74 5 1 91 91 C D E 40 156 156 96 P1 A B 1 M P2 Fig 35 Connections to 230 V plugs fÖ Power supply from the power distribution board lH External demand blocking and switched power outlet aBH Switched power outlet P1 Power outlet for heating circuit pump for heating circuit without mixer P2 No function Installation seque...

Page 43: ...nstructions provided with them The mains connection and PlusBus wiring chamber of accessories takes place on the M2IO electronics module of the cylinder module Connecting the circulation pump to P1 Connectible function Heating circuit pump for A1 heat ing circuit without mixer in connection with low loss header and heating circuit with mixer B A 1 M Fig 36 A Circulation pump B P1 plug on heat mana...

Page 44: ...with edge protec tion Connecting outlet temperature sensor of the cylinder module 1 2 Fig 38 1 Route the sensor lead through the openings with edge protection 2 Connect sensor leads plug to the outlet temper ature sensor on the plate heat exchanger Installation sequence Electrical connections cont 5853335 Installation ...

Page 45: ... core lead length up to 35 m with a cross section of 1 5 mm2 Floating switching contact connection Connection at plug lH One of the following functions can be connected External demand External blocking DHW circulation pump external demand pushbutton function pump runs for 5 min Cannot be connected with Vitodens 222 W Room temperature controller room thermostat For room temperature dependent opera...

Page 46: ...nsor top connected in the delivered condition TS2 B Cylinder temperature sensor bottom con nected in the delivered condition TS4 aJ Return temperature sensor connected in the delivered condition P1 sA Cylinder loading pump connected in the delivered condition P2 sK DHW circulation pump fÖ Power supply via gas condensing module fÖA Power supply for further accessories jF PlusBus connection further ...

Page 47: ...tion box If the total system current exceeds 6 A connect one or more extensions directly to the mains supply via an ON OFF switch see next chapter Power supply and PlusBus connection of accessories Power supply of all accessories on the heat management unit gas condensing and fuel cell module 74 74 40A 40 74 74 40A 40 B C 74 40 96 156 A 74 74 40A 40 D E Fig 42 Some accessories with direct power su...

Page 48: ... and implement all safety measures e g RCD circuit in accordance with the following regulations VDE regulations Connection conditions of the local power supply utility Install an isolator in the power cable to provide omnipolar separation from the mains for all active conductors corresponding to overvoltage cate gory III 3 mm for complete isolation The ON OFF switches integrated into the Vitovalor...

Page 49: ...t in the middle of the CAN bus system connected to only one plug lA Set switch A to ON C C A 91 91 B B ON Fig 45 If the device is integrated into a CAN bus system and is not located at the beginning or end of the CAN bus system both plugs lA connected Do not set switch A to ON A C C B B 91 91 ON Fig 46 Closing the wiring chamber 2 2x 1 3 Fig 47 Installation sequence Electrical connections cont 585...

Page 50: ...50 5 4 2 3 1 7 6 Fig 48 Fitting the programming unit A Fig 49 Lightguide A at the bottom Installation sequence Fitting the front panels of the gas condensing and fuel cell module 5853335 Installation ...

Page 51: ...51 2 1 Fig 50 Installation sequence Fitting the cylinder module front panel 5853335 Installation ...

Page 52: ... Only if required for easier handling Note Residual water may escape during dismantling 4x 4x 3 2 1 5 4 Fig 51 Installation sequence Splitting the gas condensing and fuel cell modules 5853335 Installation ...

Page 53: ...53 2 1 3 4 5 6 Fig 52 Installation sequence Splitting the gas condensing and fuel cell cont 5853335 Installation ...

Page 54: ...he cables are not damaged in the proc ess Reassemble the gas condensing and fuel cell module in reverse order Use cable ties to re secure the condensate pipe con nection piece in the factory position Torque settings Gas line fittings 20 1 Nm Fastening screws 1 5 0 5 Nm Note After assembly check the tightness of the balanced flue pipe inside the appliance Installation sequence Splitting the gas con...

Page 55: ...ountry setting 74 21 Filling with distilled water and starting the system 74 22 Terminating maintenance mode and activating energy manager 76 23 Tightness test on balanced flue system annular gap check 76 24 Burner removal gas condensing module 77 25 Checking the burner gasket and burner gauze assembly gas condensing module 78 26 Checking the back draught safety device 79 27 Checking and adjusting...

Page 56: ...l cell module under operating pressure 86 40 Checking the combustion quality 86 41 Checking the flue system for unrestricted flow and leaks 42 Setting heating curves 88 43 Checking and resetting Service on the programming unit of the gas condensing module 88 44 Fitting the cover panel and front panel 89 45 Instructing the system user 89 Commissioning inspection maintenance Steps commissioning insp...

Page 57: ... 2x 3 4 Fig 54 Note For commissioning and maintenance the program ming unit can be moved to hang on the appliance in the service position Do not disconnect the connection cable Checking the power supply Commissioning inspection maintenance Removing the front panels 5853335 ...

Page 58: ... service posi tion 3 Remove the black supply hose 4 Pull off the drain hose towards the back 5 Push the trap from the clip towards the back Note Alternatively fill the trap via the funnel and hose Capacity approx 85 ml 6 Fill trap with water and refit 7 Refit the hoses 8 Check connections Note Route the drain hose without any bends and with a constant fall 9 Refit the mains distributor box Torque ...

Page 59: ...5 l is available as an accessory Please note Commissioning with non distilled water VDE 0510 e g tap water will damage the appliance Fill only with the distilled water supplied or available as an accessory VDE 0510 Danger Escaping flue gas can damage your health Ensure that the integral trap is filled with water 5 Once water has run from the drain filling is com plete 6 Remove funnel B from the fi...

Page 60: ...rements in terms of the quality of fill water plus the DHW water circuit A Gas condensing module and heating circuits page 62 B System separation circuit fuel cell module page 68 C Fuel cell module process circuit D DHW Commissioning inspection maintenance Overview of water circuits 5853335 ...

Page 61: ...i clockwise until the end stop 2 Open on site drinking water supply cold water connection see page 39 and a DHW draw off point 3 The DHW cylinder has been completely filled when no more air flows out of the DHW draw off point 4 Close the DHW draw off point Commissioning inspection maintenance Filling the DHW cylinder 5853335 ...

Page 62: ...Remove the pressure gauge and lock the screw in the test connector D 8 Fit cover panel B 9 Open gas shut off valve C Filling gas condensing module and heating circuits Fill water According to EN 1717 with DIN 1988 100 as a heat transfer medium for DHW heating the heating water must meet fluid category 3 This requirement is met if water of potable quality is used as heating water For example if add...

Page 63: ...alues must be soft ened e g with a small softening system for heating water Total permissible hardness of the fill and top up water Total heating output Specific system volume kW 20 l kW 20 l kW to 50 l kW 50 l kW 50 3 0 mol m3 16 8 dH 2 0 mol m3 11 2 dH 0 02 mol m3 0 11 dH 50 to 200 2 0 mol m3 11 2 dH 1 5 mol m3 8 4 dH 0 02 mol m3 0 11 dH 200 to 600 1 5 mol m3 8 4 dH 0 02 mol m3 0 11 dH 0 02 mol ...

Page 64: ...ll with water until no more air is escaping from vent hole F 09 When fill water runs out without bubbles fully open shut off valve A and then B 10 Switch on ON OFF switch and activate commis sioning assistant See the following chapter 11 Vent heating circuits by bleeding the radiators 12 Adjust filling pressure by slowly closing valves E and F Check filling pressure on the display in System overvi...

Page 65: ...switch C The commissioning assistant starts automati cally If the device has already been switched on See chapter Calling up the commissioning assistant at a later point 3 Start the heat generator and follow the commis sioning assistant See the following overview Note Fault messages such as System pressure too low are associated with initial commissioning Ignore these fault messages at first Note ...

Page 66: ...cylinder with two sensors and DHW circulation pump With DHW circulation pump Low loss header buffer cyl inder Settings for the consumer groups Not installed No low loss header and no heating water buffer cylinder is available in the system DHW heating for the low loss header A low loss header is available in the system DHW heating for the buf fer cylinder A heating water buffer cylinder is availab...

Page 67: ...urn the ON OFF switch off and back on again Confirm the commissioning assistant with Switching internet ON OFF The system can be remotely controlled via the internet using an app Switch the internet connection ON and establish a connection to the router Activating the internet connection Operating instructions The access code required for commissioning can be found on the label affixed to the back...

Page 68: ...from the drain hose at drain connection E Note Ensure that the pressure in the system separation circuit does not exceed 1 5 bar during the entire filling process Regulate pressure on drain valve F and check on pressure gauge G 07 Convert the fuel cell 3 way valve using the soft ware tool or the actuator and sensor test fuel cell group see page 108 1 In Heating position flush with filling water fo...

Page 69: ...um heating output See page 93 Naming the heating circuits In the delivered condition the heating circuits are des ignated Heating circuit 1 Heating circuit 2 Heating circuit if installed If the system user prefers the heating circuits can be renamed to suit the specific system To enter names for heating circuits Operating instructions Entering heating contractor contact details The system operator...

Page 70: ...s exceeded take steps according to the table on page 71 Note Use a suitable measuring device with a resolution of at least 0 1 mbar 0 01 kPa to check the supply pressure 09 Record the actual value in the report on page 162 10 Shut down the appliance and close the gas shut off valve Remove the pressure gauge and tighten the screw in test connector D 11 Open the gas shut off valve and start the appl...

Page 71: ...starts No Fault F 59 F 457 Check connection cables on fan Check power supply on fan Yes Ignition No Fault F 359 Check ignition module con trol voltage 230 V across plugs X18 1 and X18 3 on the burner control units Check the gas supply Yes Gas train opens No Fault F 357 Check the gas supply pres sure Yes Ionisation current builds No Fault F 369 F 380 Check distance of ionisation electrode on burner...

Page 72: ...ng unit will result in the system malfunctioning Commissioning must only be carried out via one of the options given If the gas condensing module is going to be oper ated before commissioning the fuel cell module The trap on the fuel cell module must be filled The fuel cell module ON OFF switch must be switched ON Starting maintenance mode Start the maintenance mode to commission the fuel cell mod...

Page 73: ...tenance can only be made using the programming unit on the fuel cell module Removing the programming unit cover Fig 66 Programming unit GEN MNT ERR GRD DCT SET ITEM STATE L A B C D E F G H K Fig 67 A Function display B Status C Commissioning indicator flashing or constant D Confirm the selection adjusted value E Select adjust value F No function G Power supply indicator H Fault indicator K Commiss...

Page 74: ...istilled water was already filled in during the first commissioning Carry out the corresponding work steps only when restarting after maintenance A B C D Fig 68 01 Remove the cover of filling aperture A 02 Remove the closure of vent aperture C 03 Undo funnel B and push it onto filling aperture A 04 Turn on the ON OFF switch on the fuel cell mod ule 05 Open gas shut off valve D on the fuel cell mod...

Page 75: ...ows End and n1 n2 or n3 For explanations see the fol lowing table Find the cause of the fault Remove the fault Then switch off the ON OFF switch for the fuel cell module and switch it on again after 10 seconds Initiate new starting procedure If a fault recurs or the cause of the fault is unclear notify Viessmann Technical Service 18 Terminate maintenance mode if the transferred electrical output i...

Page 76: ...ode via the programming unit of the fuel cell module See the following chapter Terminating maintenance mode on the fuel cell module programming unit 1 Check that Ecological Economical or Energy manager OFF is selected at the pro gramming unit If not select one of the operating modes 2 Use to select 17 on the fuel cell module pro gramming unit 3 Press and hold SET for at least 3 s OFF will appear i...

Page 77: ...is less than 0 2 or the O2 concentration is greater than 20 6 the flue pipe is deemed to be sufficiently gas tight If actual CO2 values are greater or O2 values are lower then pressure test the flue pipe with a static pressure of 200 Pa Please note If the test port is not sealed combustion air is drawn in from the room After the tightness test re seal the test port with the plug Burner removal gas...

Page 78: ...thermal insulation ring F Check components for damage 5 Install new burner gasket G Observe correct installation position Align the tab as per the dia gram 6 Insert thermal insulation ring F and burner gauze assembly D with gasket E Observe correct installation position Align the tab as per the dia gram 7 Align the hole in burner gauze assembly D with the burner door pin Secure burner gauze assemb...

Page 79: ...n electrode gas condensing module 10 6 5 A A B 0 5 4 0 5 0 5 3 0 1 0 Fig 73 A Ignition electrodes B Ionisation electrode 1 Check the electrodes for wear and contamination 2 Clean the electrodes with a small brush not a wire brush or sandpaper 3 Check the electrode gaps If the gaps are not as specified or the electrodes are damaged replace the electrodes and gaskets and adjust them as required Tigh...

Page 80: ... of use It has no bearing on the function and service life of the heat exchanger The use of chemical cleaning agents is not required A Fig 74 1 Use a vacuum cleaner to remove combustion resi dues from heating surface A of the heat exchanger 2 Flush heating surface A with water 3 Check condensate drain Clean the trap See the following chapter Checking condensate drain and cleaning the trap gas cond...

Page 81: ...n hose towards the back 05 Push the trap from the clip towards the back 06 Clean the trap 07 Fill trap with water and refit 08 Refit the hoses 09 Check connections Note Route the drain hose without any bends and with a constant fall 10 Refit the mains distributor box Torque for fixing screws 1 5 Nm Commissioning inspection maintenance Checking condensate drain and cleaning the trap cont 5853335 ...

Page 82: ...g for gas tightness 4 Connect the cables leads Fan motor A Ionisation electrode B Ignition unit C Earth D Checking the neutralising system if installed 5 yearly maintenance of fuel cell module Note Before carrying out the maintenance work The fuel cell module must be in maintenance mode Start maintenance mode see page 72 The distilled water must have been drained Commissioning inspection maintenan...

Page 83: ...The cooling process is complete when P0 appears under ITEM 30 in STATE Danger If the wait time is not observed there is a risk of scalding and damage to the appli ance Only carry out maintenance work when the fuel cell module is cold 04 Use to select 22 05 Press and hold SET for at least 3 s In STATE 01 and 02 appear in succession Note The change from 01 to 02 takes approx 2 min The water can be d...

Page 84: ...acing the flamma ble gases sensor in addition to the 5 yearly mainte nance Replacing the sensor Installation instructions provided Filling and venting the heating system after maintenance work 1 Refill the heating system see previous chapters 2 Check the system pressure Activating the filling function Tap the following buttons 1 2 Service 3 Enter password viservice 4 Use to confirm 5 Service funct...

Page 85: ...gauge indicator may rise to 2 or 3 bar 0 2 or 0 3 MPa The safety valve may also respond and dis charge the excess pressure Therefore check the expansion vessel pre charge pressure annually Check whether the installed expansion vessel is ade quate for the system water volume Carry out this test on a cold system 1 Drain the system until the pressure gauge shows 0 Alternatively close the cap valve on...

Page 86: ... Note To prevent operating faults and damage operate the appliance with uncontaminated combustion air CO content The CO content must be 1000 ppm for all gas types CO2 or O2 content The CO2 content must be within the following limits for the lower and upper heating output respectively 7 4 to 9 5 for natural gas E and LL The O2 content must be between 4 0 and 7 6 for all gas types Note The values ap...

Page 87: ... by more than 1 implement the measures listed above 8 Enter the actual value into the report Selecting the upper lower heating output Note Ensure adequate heat transfer Tap the following buttons 01 02 Service 03 Enter password viservice 04 Use to confirm 05 Actuator and sensor test 06 Use to confirm 07 Set the lower heating output Set Burner modulation set value to the mini mum value 0 08 Use to c...

Page 88: ...using Slope or Level 6 to confirm Checking and resetting Service on the programming unit of the gas condensing module In the following cases will be displayed red indica tor flashes The specified limits have been reached There is cause for a warning Checking service messages 1 2 for Message lists 3 for Service Acknowledging a service 1 to acknowledge the maintenance messages 2 to confirm Note An a...

Page 89: ...nstruc tions to the system user and instruct the user in oper ating the system This includes all components installed as accessories e g remote control units In addition the system instal ler must make the user aware of the required mainte nance work Commissioning inspection maintenance Fitting the cover panel and front panel 5853335 ...

Page 90: ...bles 10 to accept the set value General Note Parameter values in bold are factory settings 508 0 UTC time zone Setting Explanations Setting of the UTC time zone in which the appliance is located 2 The factory setting is UTC 1 h 24 to 24 Time difference adjustable from 12 h to 12 h in in crements of 0 5 h 528 0 Set flow temperature for external demand Setting Explanations Set flow temperature for e...

Page 91: ...ter to summertime Setting Explanations 3 Month of changeover March 1 to 12 Month of changeover adjustable from January to De cember 912 3 Earliest day of changeover from summer to wintertime Setting Explanations 25 Changeover from 03 00 h to 02 00 h occurs on the Sunday after or on this set date 1 to 31 Day of changeover adjustable from 1st to 31st of the month 912 4 Month of changeover from summe...

Page 92: ...anations Temperature limit for raising the reduced set room temperature see function description 14 Temperature limit in the delivered condition 14 C 60 to 10 Temperature limit adjustable from 60 to 10 C in 1 C increments 1504 0 Source for date and time Setting Explanations Selection of source for date and time The setting depends on the heat generator and acces sories Local 0 Factory setting The ...

Page 93: ...ons Set speed of internal circulation pump In heating mode With external demand With demand in conjunction with a low loss header Delivered condition specified by settings specific to the appliance 20 to 100 Set speed adjustable from 20 to 100 1411 0 Clear maintenance messages Setting Explanations Clear maintenance messages once maintenance has been performed No 0 Maintenance messages are active i...

Page 94: ...5 to 100 Adjustable from 5 to 100 DHW Note Parameter values in bold are factory settings 497 1 DHW circulation pump for auxiliary function DHW heating Setting Explanations DHW circulation pump OFF 0 OFF during hygiene function ON 1 ON during hygiene function Danger Risk of injury due to increased DHW tempera ture Inform the system user of the risk from the high er outlet temperature at the taps 49...

Page 95: ...unction While the appliance is being calibrated 534 0 Circulation pump run on Setting Explanations Circulation pump run on after cylinder heating 120 s 120 Delivered condition 120 s run on 0 to 900 Run on time adjustable from 0 to 900 s in 60 s incre ments Note To avoid damaging the appliance do not set the run on time to 120 s 1101 2 Set speed of the primary circuit pump for DHW heating Setting E...

Page 96: ...ting Explanations Set flow temperature increased when changing from operation at reduced room temperature to operation at standard room temperature or comfort room tempera ture See also chapter Function description 0 K 0 Delivered condition increase 0 K 0 to 20 Temperature rise adjustable from 0 to 20 K 426 4 Duration for set flow temperature increase heating circuit 2 Setting Explanations Duratio...

Page 97: ...t flow temperature increase See also chapter Function description 60 min 60 Delivered condition 60 min 0 to 120 Temperature rise adjustable from 0 to 120 min 933 3 Priority DHW heating heating circuit 1 Setting Explanations Priority of DHW heating over the heating circuit Note If several heating circuits are connected only adjusta ble in conjunction with low loss header OFF 0 Without DHW heating p...

Page 98: ...ircuit 2 Setting Explanations The higher the value the greater the influence of the room temperature on the set flow temperature of the heating circuit heating curve Operation with room temperature hook up must be set for the heating cir cuit parameter 934 6 Change value for heating cir cuit with mixer only For a sample calculation see chapter Heating curve in the Function description 8 Room influ...

Page 99: ...e from 0 to 64 936 3 Priority DHW heating heating circuit 4 Setting Explanations Priority of DHW heating over heating circuit pump and mixer OFF 0 Without DHW heating priority DHW 1 With DHW heating priority 936 5 Differential temperature heating circuit 4 Setting Explanations The flow temperature of the heat generator is higher than the flow temperature of the heating circuit with mixer by an adj...

Page 100: ... heating circuit 1 Setting Explanations Maximum speed of the internal circulation pump in heating mode with standard room temperature Delivered condition specified by settings specific to the heat generator 0 to 100 Maximum speed adjustable from 0 to 100 1192 0 Minimum flow temperature limit heating circuit 1 Setting Explanations Minimum flow temperature limit for the heating circuit 20 C 20 Minim...

Page 101: ... 4 Setting Explanations Minimum flow temperature limit for the heating circuit 20 C 20 Minimum limit in the delivered condition 20 C 1 to 90 Setting range limited by heat generator specific pa rameters 1195 1 Maximum flow temperature limit heating circuit 4 Setting Explanations Maximum flow temperature limit for the heating circuit 74 C 74 Maximum limit in the delivered condition 74 C 10 to 100 Se...

Page 102: ...a ture 1 K below selected value 25 C 25 Delivered condition Heating limit at outside tempera ture 25 C 10 to 35 Heating limit adjustable from 10 to 35 C in 1 C incre ments 1398 1 Heating limit Economy function outside temperature heating circuit 4 Setting Explanations Heating circuit pump logic function summer economy control Heating circuit pump switches off when out side temperature 1 K above se...

Page 103: ...0 Gas price per m3 Setting Explanations Gas price per m3 0 053 Gas price in the delivered condition 0 053 0 001 to 5 0 Adjustable from 0 001 to 5 0 1411 0 Clear maintenance messages Setting Explanations Clear maintenance messages once maintenance has been performed No 0 Maintenance messages are active if present Yes 1 Clear maintenance messages once 1431 0 CO2 factor gas per kWh Setting Explanatio...

Page 104: ...o heating circuits with mixers are available in the system 1 If heating circuits with mixer EM M1 or EM MX extensions are present in the system Always set subscriber number EM P1 extension to consecu tive number after extensions EM M1 or EM MX Note Extensions EM EA1 may have the same subscriber number as the extensions EM P1 EM M1 or EM MX The following table shows the possible features of a syste...

Page 105: ...tary switch S1 Select the operating status e g Fault message input Fault message output Operating mode changeover DIO EM EA1 1 DIO EM EA1 2 DIO EM EA1 3 System configuration parameters Subscriber numbers of the connected extensions cont 5853335 Parameter ...

Page 106: ...y Service functions Maintenance reset Filling Air vent valve System log WiFi Information Reset fuel cell Change passwords Commissioning Appliances detected Access point ON OFF Exit service Note Tap to return to Service main menu Exiting the service menu Tap the following buttons Exit service menu or Note The system exits the service menu automatically after 30 min Changing the service password In ...

Page 107: ...s Checking operating data Operating data can be called up in various areas See Diagnosis in the service menu overview Operating data on heating circuits with mixer can only be called up if such components are installed in the system Note If a called up sensor is faulty appears on the display Calling up operating data Tap the following buttons 1 2 Service 3 Enter password viservice 4 Use to confirm...

Page 108: ...l up saved warning messages A 12 Real time clock battery flat Measure Replace the battery type CR2032 in the HMU heat manage ment unit A 18 Possible condensate backup in the heat cell Measure Check the combustion chamber and condensation drain A 20 Service interval could not be activated Measure Check the time and date set tings Information to call up saved service informa tion I 55 Maximum DHW te...

Page 109: ...it pump 2 speed Set value Speed heating circuit pump heating circuit 2 with mixer in Heating circuit pump 3 speed Set value Speed heating circuit pump heating circuit 3 with mixer in Heating circuit pump 4 speed Set value Speed heating circuit pump heating circuit 4 with mixer in Mixer HC 2 Open Output for Mixer open enabled mixer extension kit Stop Current position is maintained Close Output mixe...

Page 110: ...alve in central position filling draining DHW Diverter valve set to DHW heating Circulation pump for cyl inder heating On Off System separation cir cuit pump On Off Fuel cell module Checking power generated Operating instructions for Vitovalor PT2 Checking the gas consumption to reclaim fuel tax Operating instructions for Vitovalor PT2 Checking operating condition Operating instructions for Vitova...

Page 111: ...tings for the protection relay and the disconnection time of the coupling switch ITEM Meaning Set value Response time 81 AC undervoltage stage 184 V 2 5 s 83 AC overvoltage stage 1 262 2 V 1 0 s 84 AC overvoltage stage 2 237 7 V 0 5 s 85 Frequency drop stage 1 47 5 Hz 20 0 s 86 Frequency drop stage 2 47 Hz 0 5 s 87 Frequency rise 52 Hz 0 5 s 8a Islanding operation 1 0 Hz s 0 0 s 8b Nominal voltage...

Page 112: ...locked 8 Remove the SD card Inserting the SD card and saving the fuel cell module data 1 Insert the SD card into the slot See chapter Removing the SD card If the SD card has been inserted correctly the LED on the PCB flashes 2 Use to select 04 on the programming unit 3 Press SET to confirm 4 On the programming unit use to select on 5 Press SET to confirm When the LED on the PCB goes off data recor...

Page 113: ... sponding extension module The rotary switch position was set during installation To identify the affected module check the rotary switch position on the module if necessary The following is displayed Date and time of the occurrence of the fault Fault number Description of the fault Subscriber number of the component on which the fault has occurred PlusBus subscriber components 0 EM S1 extension A...

Page 114: ...ssages 7 If you wish to delete the list tap 8 to confirm Overview of electronics module A B C D E Fig 83 A M2IO electronics module B Burner control unit BCU C Heat management unit D HMI programming unit with RF module E Programming unit fuel cell module Troubleshooting Fault display and other messages on the cont 5853335 Diagnosis ...

Page 115: ...em perature sensor Check outside cylinder tempera ture sensor see page 140 F 29 Regulates without flow tem perature sensor for low loss header Lead break low loss header sensor Check the low loss header sensor F 30 Regulates without flow tem perature sensor for low loss header Short circuit low loss header sensor Check the low loss header sensor F 37 Burner locked out Internal circulation pump off...

Page 116: ...onisation electrode and connecting cable Reset device F 69 Burner in a fault state Ionisation current lies out side the permissible range Check ionisation electrode and connecting cable Reset device F 70 Burner in a fault state Internal burner control unit fault Reset device F 71 Burner in a fault state Fan speed too low Check fan on blockade Reset device F 72 Burner in a fault state Fan idle stat...

Page 117: ...t state Data memory access error Turn device off and on again Reset device F 162 Burner in a fault state Processor low voltage Turn device off and on again Check connecting cable Reset device F 163 Burner in a fault state Memory access checksum error Turn device off and on again Reset device F 182 No DHW heating Short circuit outlet tem perature sensor Check the outlet temperature sen sor F 183 No...

Page 118: ...air supply for Ingress of flue gas due to non compliance with chimney clear ances e g by a solid fuel boil er Outgassing contamination in the air supply system e g sili cones oils paints detergents deposits etc If the fault message appears dur ing initial commissioning Immedi ately close the gas shut off valve on the fuel cell module or the gas shut off valve for the entire unit Notify Viessmann T...

Page 119: ...F9 No power generation Air in the distilled water circuit Carry out fuel cell module commis sioning again If the fault recurs notify Viessmann Technical Service Note The message can only be cleared on the programming unit of the fuel cell module F 294 9BF0 No power generation Blockage in the flue sys tem Check flue system Note Reset the message on the fuel cell module programming unit Then switch ...

Page 120: ...l Service Note Fault message can only be reset on the programming unit of the fuel cell module F 304 C2F1 No power generation Fault stack voltage 2 fuel cell Check balanced flue system for Flue gas recirculation Leaks Check ventilation air supply for Ingress of flue gas due to non compliance with chimney clear ances e g by a solid fuel boil er Outgassing contamination in the air supply system e g ...

Page 121: ... cell only heats the cylin der module Short circuit common re turn temperature sensor Check return temperature sensor F 344 Fuel cell only heats the cylin der module Lead break common re turn temperature sensor Check return temperature sensor F 345 Burner locked out Temperature limiter has responded Ensure adequate heat transfer F 346 Burner in a fault state Ionisation current calibra tion error C...

Page 122: ...llowing Flue gas recirculation Leak Flue gas congestion caused by water sack if the flue gas system is not steep enough Constriction Blockage Repair flue system if necessary Reset device F 353 Burner locked out Insufficient gas supply burner output reduced Check the gas supply Optically check input side screen in the gas train for contamination Reset device F 354 Burner in a fault state Gas modula...

Page 123: ...me signal is not present or insufficient at burner start Check ionisation electrode and connecting cable Check plug in connection for loose connections Note Deposits on the electrodes indicate foreign bodies in the combustion air Check the installation room and flue system for causes of the de posits For example Laundry de tergents cleaning agents toilet ries deposits in the ventilation air supply...

Page 124: ...ing cable Check plug in connections Check flue system or flue gas re circulation Check if condensate banked Visually inspect gas train inlet and strainer on the inlet side for con tamination Note To prevent water damage detach fan unit before removing the burn er Note Deposits on the electrodes indicate foreign bodies in the combustion air Check the installation room and flue system for causes of ...

Page 125: ...inlet and strainer on the inlet side for con tamination Note To prevent water damage detach fan unit before removing the burn er Note Deposits on the electrodes indicate foreign bodies in the combustion air Check the installation room and flue system for causes of the de posits For example Laundry de tergents cleaning agents toilet ries deposits in the ventilation air supply chimney If burner gauz...

Page 126: ...r causes of the de posits For example Laundry de tergents cleaning agents toilet ries deposits in the ventilation air supply chimney If burner gauze assembly and ioni sation electrode have been re placed also clean fan unit gas air channel and Venturi extension Reset device F 378 Burner in a fault state Flame loss in the stabilisa tion or operating phase Check gas supply gas pressure and gas flow ...

Page 127: ...ec essary Reset device F 385 Burner in a fault state Short circuit signal 1 ioni sation current Check ionisation electrode and connecting cable Reset device F 386 Burner in a fault state Lead break signal 1 ioni sation current Check ionisation electrode and connecting cable Reset device F 387 Burner in a fault state Short circuit signal 2 ioni sation current Check ionisation electrode and connecti...

Page 128: ...ault state Gas valve monitoring re lay 1 has responded Reset device F 410 Burner in a fault state Internal error processor burner control unit Reset device F 415 No current values of exter nal electricity meters No power generation in Economical and Ecologi cal operating modes Note Power generation possible only with Energy manager OFF operating mode Communication error CAN bus Check CAN bus conne...

Page 129: ...ring chamber connection at EM EA1 electronics module DIO extension F 441 Burner locked out Lead break gas pressure switch on configuration adaptor EM EA1 elec tronics module DIO Check wiring chamber connection at EM EA1 electronics module DIO extension F 442 Burner locked out Short circuit signal flue gas damper on configura tion adaptor EM EA1 electronics module DIO Check flue gas damper connecti...

Page 130: ...trol unit F 455 Burner in a fault state Error in logical program run monitoring Reset device F 456 Burner in a fault state System status at system start Reset device F 457 Burner in a fault state Fan blocked Check impeller for ease of opera tion Replace fan unit if necessary Reset device F 458 Burner locked out Internal error Restart heat generator Unlock de vice is necessary F 461 Burner in a fau...

Page 131: ...lue gas re circulation Reset burner Note Deposits on the electrodes indicate foreign bodies in the combustion air Check the installation room and flue system for causes of the de posits For example Laundry de tergents cleaning agents toilet ries deposits in the ventilation air supply chimney If burner gauze assembly and ioni sation electrode have been re placed also clean fan unit gas air channel ...

Page 132: ...reign bodies in the combustion air Check the installation room and flue system for causes of the de posits For example Laundry de tergents cleaning agents toilet ries deposits in the ventilation air supply chimney If burner gauze assembly and ioni sation electrode have been re placed also clean fan unit gas air channel and Venturi extension Reset device F 467 Burner in a fault state Gas supply ins...

Page 133: ...ommunication error electricity meter Check CAN bus connection to the external electricity meter ob serve polarity and correct if nec essary Check setting of CAN bus termi nator switch See page 48 Disconnect electricity meter from power supply then reconnect F 473 No heat demand Heat management unit communication error Check connecting cable between burner control unit and heat man agement unit F 4...

Page 134: ...ensor heating circuit 2 with mixer Check flow temperature sensor TS1 on extension kit mixer elec tronics module ADIO See page 140 F 545 Mixer closes Heating circuit pump is operational Short circuit flow temper ature sensor 2 in heating circuit with mixer Check flow temperature sensor TS1 on extension kit mixer elec tronics module ADIO See page 140 F 546 Mixer closes Heating circuit pump is operat...

Page 135: ...of operation Carry out decommissioning P 8 Interval in burner hours gas condensing module until the next service Perform maintenance P 14 Fuel cell maintenance re quired in less than 45 days Perform maintenance P 15 Fuel cell maintenance re quired in less than 1 month Perform maintenance P 19 Fuel cell overhaul required in less than 3 month P 20 Fuel cell overhaul required in less than 2 month P 2...

Page 136: ...e repair A 8 08F0 System in operation 6 months until decommis sioning after 20 years of operation Schedule decommissioning A 12 System in operation Real time clock battery flat Replace battery in heat manage ment unit A 18 System in operation Possible condensation water accumulation in the heat cell Check combustion chamber and condensate drain Repairs Moving the programming unit to the service po...

Page 137: ...137 1 2 2x 3 4 Fig 84 Draining the system on the heating water and DHW sides Only when necessary for repair work Troubleshooting Repairs cont 5853335 Diagnosis ...

Page 138: ...to drain at drain valves E F G H and K The drain hose is attached to the fuel cell module Draining the fuel cell module system separation circuit A B C Fig 87 1 Put the fuel cell module into maintenance mode See page 72 2 Switch the ON OFF switch of the fuel cell module to OFF See page 65 3 Attach the drain house to valve A and connect it to a drain 4 Open the drain valve on the underside of fitti...

Page 139: ...p to 90 min Please note If this waiting time is not observed there is a risk of scalding and damage to the appliance 2 Place a sufficiently large flat container under the drain opening A 3 Unscrew filter from drain opening A Ensure ade quate ventilation in the system separation circuit Draining the system on the DHW side B A Fig 89 1 Shut off the cold water connection 2 To vent open a draw off poi...

Page 140: ...ion of the temperature sen sors see connection and wiring diagrams from page 155 Danger The temperature sensors are immersed in the heating water risk of scalding Drain the boiler before replacing the sensor See page 137 10 1 10 30 50 70 90 110 Temperature in C 0 4 0 6 0 8 2 4 6 8 20 Resistance in kΩ Fig 92 Sensor type NTC 10 kΩ 1 Pull plug and measure the sensor resistance See connection and wiri...

Page 141: ...e gas can cause poisoning When restarting check for leaks on the flue gas side 7 If the permissible flue gas temperature has been exceeded the flue gas temperature sensor locks out the appliance Reset the burner on the pro gramming unit once the flue system has cooled down Fault during commissioning fault message F 416 During commissioning the control unit checks for cor rect placement of the flue...

Page 142: ...om missioning is carried out with the Service assistant software tool Spare part installation instructions and www service assistent info Checking the cylinder loading plate heat exchanger Note During and after removal small amounts of water may trickle from the plate heat exchanger B C A Fig 95 1 Shut off and drain the appliance on the heating water and DHW loading cylinder sides See page 137 2 U...

Page 143: ...ate heat exchanger B to the side and remove from the top 3 Check the connections on the heating water and DHW sides for contamination and scaling replace the plate heat exchanger if necessary 4 Install in reverse order using new gaskets Removing the flow sensor 1 1 2 3 Fig 97 Troubleshooting Repairs cont 5853335 Diagnosis ...

Page 144: ... unit components have to be replaced 2 1 6 4 2x 3 5 24 Nm 3x 5 Nm Fig 98 Replacing the power cable When replacing the power cable use the following cable type H05V2V2 F 3 G 1 5 mm2 Connection see page 156 Troubleshooting Repairs cont 5853335 Diagnosis ...

Page 145: ...ixer motor After being switched on the appliance implements a self test During this the mixer is opened and closed again Note The mixer motor can also be started via the actuator and sensor test see chapter Checking outputs Observe the rotational direction of the mixer motor dur ing its self test Then manually set the mixer back to Open The flow temperature sensor must now capture a higher tempera...

Page 146: ...in C 0 4 0 6 0 8 2 4 6 8 20 Resistance in kΩ Fig 101 Sensor type NTC 10 kΩ 1 Disconnect plug from the extension kit 2 Check the sensor resistance and compare it to the curve In the event of severe deviation replace the sensor Troubleshooting Repairs cont 5853335 Diagnosis ...

Page 147: ...en the specified temper ature has been reached at the cylinder temperature sensor After loading has stopped the cylinder loading pump and the 3 way diverter valve remain on for 30 s more Operating the fuel cell module The fuel cell module is switched on to generate power according to the heat up condition of the integral DHW cylinder and the energy manager defaults Heating energy generated during ...

Page 148: ...tection class II 8 0 mm air and creep path or 2 0 mm insulation thickness to live parts Output hH A fault message facility can be connected to output hH Rated current max 1 A Relay output Z1 The following functions can be connected 230 V fault message input to digital input 1 L on connector Z1 and system block When the contact is closed the gas condensing module and fuel cell module are blocked Fa...

Page 149: ...rature the higher the flow temperature must be in order to reach the room temperature set point Factory settings Slope 1 4 Level 0 Note If heating circuits with mixer are present in the heating system The flow temperature of the heat generator is one differential temperature higher than the flow tem perature for the heating circuits with mixer Differential temperature in delivered condition set to...

Page 150: ...in C 90 20 20 Outside temperature in C 3 5 1 4 0 2 Fig 106 A Changing the slope B Changing the level vertical parallel offset of the heating curve Raising the flow temperature of the heating cir cuits during operation with room temperature hook up The higher the value the greater the influence of the room temperature on the set flow temperature of the heating circuit Room influence factor paramete...

Page 151: ...ow temperature achieved Operating state and outside temperature at handover Different temperature profiles can be set via parameter 897 0 Note Temperature profile 6 ends after 21 days The function continues after a power failure or after the control unit has been switched off When screed drying has completed or been manually switched off the sys tem is regulated in accordance with the selected par...

Page 152: ...n at reduced room temperature the reduced set room temperature can be automatically raised subject to the outside temperature The temper ature is raised in accordance with the selected heating curve and no higher than the standard set room tem perature or comfort room temperature Depending on which set room temperature will become active in the next time phase The outside temperature limits for th...

Page 153: ...ure B Heating curve for operation at reduced room tem perature Reducing the heat up time During the transition from operation at reduced room temperature to operation at standard room tempera ture or comfort room temperature the flow tempera ture will be raised in accordance with the selected heating curve The value and duration of the additional increase in the set flow temperature is adjusted in...

Page 154: ...t or the O2 content of the flue gas is measured The pre vailing air ratio is determined using the actual values The correlation between CO2 or O2 content and air ratio λ is shown in the following table To achieve optimum combustion control the system regularly carries out an automatic self calibration also after power failures shutdown For this the combus tion is briefly regulated to maximum ionis...

Page 155: ... condensing module A3 Burner control unit BCU A4 Programming unit A5 M2IO electronics module cylinder module A7 EM P1 or EM EA1 extension A8 Fuel cell module junction box A9 SA 191 extension Connection and wiring diagram Overview connection diagrams 5853335 Appendix ...

Page 156: ... C D B Fig 116 A1 Mains distributor box Z1 Electricity meter A Heat management unit gas condensing boiler B Power supply C BUS wiring chamber electricity meter D Fuel cell control unit Connection and wiring diagram Mains distributor box 5853335 Appendix ...

Page 157: ...ical interfaces Outside temperature sensor fÖ Power supply jF PlusBus lA CAN bus lH Floating input 230 V and output 230 V aBH Mains voltage output P1 Parametrisable output for e g circuit pump for heating circuit without mixer Connection and wiring diagram Connection scheme heat management unit gas condensing module 5853335 Appendix ...

Page 158: ...To M2IO electronics module cylinder module D To burner control unit E To M2IO electronics module cylinder module F To the fuel cell module G External electricity meter Connection and wiring diagram Connection scheme heat management unit gas cont 5853335 Appendix ...

Page 159: ...or aJ Return temperature sensor sÖ Boiler circuit pump dD Flow sensor dG Gas solenoid valve fÖ Power supply gF Ignition unit a Ö Fan motor a ÖA Fan motor control aND Water pressure sensor A Burner control unit B Heat management unit gas condensing module aBH plug C Heat management unit gas condensing module X4 plug Connection and wiring diagram Burner control unit connection scheme 5853335 Appendi...

Page 160: ...Cylinder module control unit PCB A11 SA 191 extension PCB P1sA Cylinder loading pump P2sK DHW circulation pump P3 No function P4 No function PWM1 No function PWM2 No function Connection and wiring diagram Electronics module M2IO connection scheme cylinder module 5853335 Appendix ...

Page 161: ...A 3 way valve stepper motor dÖB 3 way valve stepper motor fÖ Power supply fÖA Mains voltage output jF PlusBus A To heat management unit gas condensing module plug aBH B To heat management unit gas condensing module plug jF C PlusBus accessories D Fuel cell 3 way valve E Gas condensing boiler 3 way valve Connection and wiring diagram Electronics module M2IO connection scheme cont 5853335 Appendix ...

Page 162: ...4 0 7 6 At upper heating output by vol 4 0 7 6 Carbon monoxide content CO At lower heating output ppm 1000 At upper heating output ppm 1000 Fuel cell module Electrical output W 750 Power generated kWh Amount of gas consumed m3 Hours run h Distilled water cartridge replaced Air filter A replaced Air filter B replaced CO sensor replaced 2 If the fuel cell module is in operation when the measurement ...

Page 163: ...ower WiFi mW 100 100 100 100 Maximum transmitting power Zigbee mW 10 10 10 10 Supply values relative to the max load Natural gas E m3 h 3 38 3 38 3 38 3 38 Natural gas LL m3 h 3 93 3 93 3 93 3 93 Protection class I Permissible ambient temperature Operation C 5 to 40 Storage and transport C 25 to 70 Electronic temperature limiter setting C 88 88 88 88 Temperature limiter setting fixed C 110 110 110...

Page 164: ...ystem are not part of ordi nary household waste For decommissioning the system isolate the system from the power supply and allow components to cool down where appropriate All components must be disposed of correctly Disposal Final decommissioning and disposal 5853335 Appendix ...

Page 165: ...h Directive 2014 53 EU Using the serial number the full Declaration of Con formity can be found on the following website www viessmann co uk eu conformity Manufacturer s certificate according to the 1st BImSchV Germany We Viessmann Werke GmbH Co KG D 35107 Allendorf confirm that the product Vitovalor PT2 type F11T F19T F25T F32T complies with the NOx limits specified by the 1 BImSchV 6 Germany All...

Page 166: ...c distribution box 19 20 21 23 Drain lines routing 27 E Electronic combustion controller 154 Electronics module M2IO Connection plan 160 Energy manager 76 Energy meter 17 Excess export 21 23 Excess export system 18 Extension EM EA1 148 Extension kit for heating circuit with mixer 145 F Fault codes Gas condensing module 115 Fault history 113 Fault message call up 113 Fault messages Display 113 Faul...

Page 167: ...t pump 100 Maximum heating output 93 Min flow temperature heating circuit 100 101 Min speed heating circuit pump 100 Minimum heating output 94 Operating mode circulation pump 94 Outside temperature limit 92 Purchase price electrical energy per kWh 103 Reset fuel cell service counter 103 Residual head control circulation pump 93 Room influence factor heating circuit 97 98 99 100 Room temperature ho...

Page 168: ...emperature Setting 149 Short circuit protection 19 20 21 23 Siting 11 Specification 163 Static pressure 62 Gas condensing boiler 62 Sub distribution board 18 24 Subscriber number Extensions 104 Setting 104 Subscriber number of connected components 113 Summer economy control 101 102 Switch S1 104 Symbols 9 System Draining 138 System configuration 90 System filling 68 T Tightness test balanced flue ...

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