Viessmann VITOTRONIC 300 Installation And Service Instructions Manual
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Viessmann VITOTRONIC 300 Installation And Service Instructions Manual

Weather-compensated digital boiler and heating circuit control
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for heating engineers
Vitotronic 300
type KW3
See applicability, page 3.
VITOTRONIC 300
Please keep safe

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Summary of Contents for Viessmann VITOTRONIC 300

  • Page 1 Vitotronic 300 type KW3 See applicability, page 3. VITOTRONIC 300 Please keep safe...

  • Page 2: Safety Instructions

    Safety instructions Please follow these safety instructions closely to prevent accidents and material losses. Safety regulations Work on gas equipment Repair work Initial start-up Instructing the system user ¨ Safety instruction In this instruction manual, this heading denotes information which must be observed to prevent accidents and material losses.
  • Page 3 Product information/applicability Vitotronic 300, type KW3 Index General information Heating system designs Installation aBÖ Initial start-up Service scans...
  • Page 4 Index Troubleshooting Function description Components aBÖ Coding Parts list Connection and wiring diagram Appendix...

  • Page 5: System Version

    System version 1 One direct connected heating circuit without mixer Plug § only sÖ fÖ lÖ Required coding Automatic changeover Standard delivery boiler.
  • Page 6 System version 2 One mixer circuit only sÖ fÖ Plug lÖ § Required coding Check valve; only required if joined to a connector. e.g. for underfloor heating control via flow and return temperature sensor. Standard delivery boiler.
  • Page 7 System version 3 One direct connected heating circuit without mixer and one mixer circuit only sÖ sÖ fÖ Plug lÖ § Required coding Automatic changeover Check valve; only required if joined to a connector. e.g. for underfloor heating control via flow and return temperature sensor. Standard delivery boiler.
  • Page 8 System version 4 Two mixer circuits...
  • Page 9 System version 4 Plug § sÖ fÖ lÖ Required coding Check valve; only required if joined to a connector. e.g. for underfloor heating control via flow and return temperature sensor. Standard delivery boiler.
  • Page 10 System version 5 One direct connected heating circuit without mixer and two mixer circuits...
  • Page 11 System version 5 Plug § sÖ sÖ fÖ lÖ Required coding Automatic changeover Check valve; only required if joined to a connector. e.g. for underfloor heating control via flow and return temperature sensor. Standard delivery boiler.

  • Page 12: Summary Of Electrical Connections

    Summary of electrical connections...
  • Page 13 Summary of electrical connections Plug 230 V~ Low voltage plug sÖ § fÖ gÖ aBÖ...

  • Page 14: Inserting Cables And Applying Strain Relief

    Inserting cables and applying strain relief...
  • Page 15 Changing the high limit safety cut-out (if required) º ¨ If adjusted to 100 ºC, do not set the control thermostat above 75 ºC. Adjustment to 100 ºC at EGO º cannot...
  • Page 16 Changing the high limit safety cut-out setting Adjustment to 100 ºC at Juchheim º...
  • Page 17 Changing the control thermostat (if required) º º º Change to 87 ºC/95 ºC ¨ If the system is operated in conjunction with a domestic hot water cylinder, ensure that the maximum permissible domestic hot water temperature is not exceeded. If necessary, install a suitable safety device for this purpose.
  • Page 18 Inserting the boiler coding card Boiler Coding Part no. card...
  • Page 19 Sensor connection...

  • Page 20: Pump Connection

    Pump connection Available pump connections Please note: sÖ Heating circuit pumps for mixer circuits are connected to the mixer circuit extension kit (see page 73). Pumps 230 V~ Pumps 400 V~...
  • Page 21 External connections on plug aBÖ ¨ The external connections must be volt-free. Plug aBÖ must remain plugged in, even if no connection is made. External burner blocking External burner start ¨ Only safety shutdown equipment, e.g. high limit thermostats, may be connected External safety equipment to these terminals.
  • Page 22 Connecting central fault messages...

  • Page 23: External Heating Program Changeover

    External heating program changeover Manually pre-selected heating program Changed heating program G Heating and DHW (set to 3 ºC ¢ standby mode) G Heating and DHW reduced room temperature (set higher than 3 ºC) Only DHW Standby mode...
  • Page 24 Burner connection Modulating oil- and gas-fired boilers Connect the burner in accordance with DIN 4791. Terminal codes → → Equipment codes Burner without connector...
  • Page 25 Burner connection Burner without fan Terminal codes Colour coding to DIN/IEC 757...
  • Page 26 Burner connection Two-stage/modulating burner extension Terminal codes → → Colour coding to DIN/IEC 757...

  • Page 27: Mains Electrical Connection

    Mains electrical connection Requirements Mains electrical isolator requirements Replacing the mains connection cable Safety instructions Do not interchange cores "L1" and "N": L1: brown N: blue PE: green/yellow fÖ Colour coding to DIN/IEC 757...
  • Page 28 Installing the top of the control unit...

  • Page 29: Opening The Control Unit

    Opening the control unit...
  • Page 30 Steps Further details regarding the individual steps Checking the heating circuit allocation...
  • Page 31 Further details regarding the individual steps Checking the high limit safety cut-out TÜV TÜV Changing the display language Matching up the coding addresses...
  • Page 32 Further details regarding the individual steps Checking outputs (actuators) and sensors Relay test Please note: The illuminated heating circuit selector button indicates the corresponding heating circuit. Checking sensors...
  • Page 33 Further details regarding the individual steps Adjusting heating curves º º...
  • Page 34 Further details regarding the individual steps Changing slope and level...

  • Page 35: Further Details Regarding The Individual Steps

    Further details regarding the individual steps Adjusting the set room temperature Example 1: Example 2: Adjustment of the standard room Adjustment of the reduced room temperature from 20 ºC to 26 ºC temperature from 5 ºC to 14 ºC º º...

  • Page 36: Service Level Summary

    Service level summary Function Key combination Exit Page Press d Press d Press K Press d Press K Press d Press c Press c Press c Press d Press K Press K Press L Press L Press L Press G Press d Press c Press d...
  • Page 37 Temperatures, boiler coding card and brief scans The adjusted outside temperature can be reset to the current outside temperature with e. The maximum flue gas temperature can be reset to the current value with e. Display only if a remote control unit is installed.
  • Page 38 Temperatures, boiler coding card and brief scans...

  • Page 39: Scanning Operating Conditions

    Scanning operating conditions Heating circuits A1, M2 and M3 Display only if a holiday program has been set up. Display only, if a value higher than 0 has been set for coding address "C7". Display only if a remote control unit is installed.
  • Page 40 Scanning and resetting "Maintenance" display Please note: Set code "24:1" and then code "24:0", if maintenance is implemented before "Maintenance" is displayed; the set maintenance parameters for hours run and periods are reset to 0. º Please note: An acknowledged maintenance message can be redisplayed by pressing d (approx.
  • Page 41 Scanning and resetting "Maintenance" display After maintenance has been carried out Please note: If the coding address "24" is not reset, a new "Maintenance" display will be shown on Monday at 07:00 hrs.
  • Page 42 Faults with fault display at the programming unit º Find the fault D B G - D B G -...
  • Page 43 Faults with fault display at the programming unit Fault display design D B G - Fault display in plain text Calling up acknowledged fault messages...
  • Page 44 Faults with fault display at the programming unit Fault Cause Check System code characteristics Please note: Set code "24:0" after the maintenance º...
  • Page 45 Faults with fault display at the programming unit Fault Cause Check System code characteristics...
  • Page 46 Faults with fault display at the programming unit Fault Cause Check System code characteristics...
  • Page 47 Faults with fault display at the programming unit Fault Cause Check System code characteristics aBÖ...
  • Page 48 Faults with fault display at the programming unit Fault Cause Check System code characteristics cE e cE f...
  • Page 49 Faults with fault display at the programming unit Fault Cause Check System code characteristics dE a dE b dE c dE d dE e dE f...
  • Page 50 Downloading fault codes from the fault memory (fault history) Order of fault Fault code codes occurred F 1 0...
  • Page 51 Faults without fault display at the programming unit Boiler cold, burner does not start H Pumps are not running → fÖ H Pumps are running → H Pumps are running →...
  • Page 52 Faults without fault display at the programming unit Boiler water temperature too high or too low H Set value too high or too low → H Set value OK →...
  • Page 53 Faults without fault display at the programming unit Boiler hot enough, but the heating circuit pumps will not run H Pumps are running → H Pumps are not running → H Pumps are not running → sÖ...

  • Page 54: Brief Description

    Boiler temperature control Brief description Coding addresses that influence the boiler water temperature control Functions Lower control range limits º º Upper control range limits º º º º º...

  • Page 55: Boiler Temperature Control

    Boiler temperature control Auxiliary circuits Please note: The heating program changeover can be effected for one heating circuit or several heating circuits simultaneously via plug aVD, see coding address "91". Control sequence Boiler goes cold The boiler heats up...
  • Page 56 Heating circuit control Brief description Coding addresses which influence the heating circuit control Functions Outside temperature Time program...

  • Page 57: Heating Circuit Control

    Heating circuit control Domestic hot water temperature º Heating circuit pump logic (economy circuit) º Room temperature...
  • Page 58 Heating circuit control Extended economy circuit Underfloor heating º Screed drying function Please note: Note DIN 4725 part 4. Four different temperature profiles System dynamics mixer circuit can be selected for drying the screed. These profiles are activated via coding address "F1". Frost protection º...
  • Page 59 Heating circuit control Flow temperature control...
  • Page 60 Heating circuit control Upper control limit º Please note: The maximum limit is no replacement for the underfloor heating system high limit thermostat. Lower control range limit º Control sequence Mixer circuit Flow temperature falls Flow temperature rises Special conditions...
  • Page 61 DHW cylinder temperature control Brief description Coding addresses that influence the boiler water temperature control Functions Time program Frost protection º º Auxiliary functions DHW heating...
  • Page 62 DHW cylinder temperature control In conjunction with coding address "7F" DHW circulation pump Auxiliary circuits Set DHW temperature º º...
  • Page 63 DHW cylinder temperature control Control sequence DHW cylinder goes cold DHW priority º...
  • Page 64 DHW cylinder temperature control The DHW cylinder is hot Adaptive DHW heating Pump run-on DHW priority...
  • Page 65 Components from the parts list For parts list see page 124. Main PCB Optolink/emissions test switch PCB Printed circuit board Power supply unit PCB Fault message module Fuses Front panel with heating circuit selector keys...

  • Page 66: High Limit Safety Cut-Out

    Components from the parts list TÜV key High limit safety cut-out Programming unit º º Control unit Programming unit º ∅...

  • Page 67: Control Thermostat

    Components from the parts list Control thermostat Expansion module Viessmann 2-wire BUS º º ¨ Safety instruction Adjust downwards at least 20 K higher than the DHW temperature, upwards at least 15 K lower than the high limit safety cut-out.
  • Page 68 Components from the parts list Boiler temperature sensor and cylinder temperature sensor Connection Checking the sensor § % Boiler water or Resistance DHW cylinder in W temperature °C Specification º º º º...

  • Page 69: Outside Temperature Sensor

    Components from the parts list Outside temperature sensor Connection Checking the outside temperature sensor Outside Resistance temperature in °C in W º Specification º...
  • Page 70 Radio clock receiver, part no. 7450 563 Connection Specification Check reception º...

  • Page 71: Flow Temperature Sensor

    Flue gas temperature sensor, part no. 7450 630 Connection Checking the flue gas temperature sensor Flue gas Resistance temperature in W in ºC Specification º º º Mixer circuit extension kit Flow temperature sensor...
  • Page 72 Mixer circuit extension kit Mixer extension Electrical connections summary CD EF Low voltage connections sÖ fÖ...

  • Page 73: Mixer Circuit Extension Kit

    Mixer circuit extension kit Pump connection 230 V~ Pump connection 400 V~...
  • Page 74 Mixer circuit extension kit Control unit connection Mains electrical connection Please note: Please note: Use KM BUS distributor (see page Use the mains distributor when 93) when connecting several BUS using two extension kits (see users. page 94).

  • Page 75: Mixer Motor

    Mixer circuit extension kit Mixer motor, part no. 7450 657 (only when using the extension kit, part no. 7450 059) Specification í...
  • Page 76 Mixer circuit extension kit Mixer motor, part no. 9522 487 (only when using the extension kit, part no. 7450 059) Specification ºí...
  • Page 77 Mixer circuit extension kit Mixer motor, part no. 9522 488 (only when using the extension kit, part no. 7450 059) Specification ºí...
  • Page 78 Mixer circuit extension kit Changing the rotational direction must ¨ Safety instruction Switch OFF the mains power supply before opening the device. Switching the mains switch on the mixer extension OFF is not safe enough. Relay test Please note: A relay test is implemented every time the system is switched ON.
  • Page 79 Mixer circuit extension kit...
  • Page 80 Mixer circuit extension kit Coding always Specification º sÖ º...
  • Page 81 Contact temperature sensor, part no. 7450 642 Connection Check sensor Flow or return Resistance temperature in W in °C Specification º º º...
  • Page 82 High limit thermostat for limiting the maximum temperature Specification º sÖ...
  • Page 83 Remote control Vitotrol 200, part no. 7450 017 Connection...

  • Page 84: Remote Control

    Remote control Specification º Remote control Coding switch affects setting º º º º §...
  • Page 85 Remote control Vitotrol 300, part no. 7450 790 Connection...
  • Page 86 Remote control Specification Remote control Coding switch affects setting º º º º º º §...
  • Page 87 Remote control Connecting several remote control units Version 1...
  • Page 88 Remote control Version 2...
  • Page 89 Room temperature sensor, part no. 7408 012 Connection...
  • Page 90 Room temperature sensor, Part no. 7408 012 Check the room temperature sensor Room Resistance temperature in W in ºC º Specification º º Plug aBÖ, Part no. 7819 028...
  • Page 91 Control module V, part no. 7143 513 ¨ Do not alter the allocation of connections to sockets in control module V.
  • Page 92 Control module V, Part no. 7143 513 Plug a-D ¨ Frost protection for boiler gÖ and heating system are not safeguarded when this contact is closed. º...
  • Page 93 KM BUS distributor, part no. 7415 028...
  • Page 94 Mains power distributor, part no. 7415 030 Remove the jumper, if a mains isolator is connected to these terminals.
  • Page 95 Boiler coding card Burner connection cables...

  • Page 96: Vitoair Draught Stabiliser

    Vitoair draught stabiliser, part no. 7338 725 and 7339 703 Colour coding to DIN/IEC 757 Function check → → In emergency mode...
  • Page 97 Motorised flue gas damper, part no. 7252 819 Colour coding to DIN/IEC 757 Function check → → In emergency mode...
  • Page 98 Resetting codes into the "as delivered condition" Code 1 Calling up code 1...
  • Page 99 Code 1 Summary Coding in the delivered condition Possible change System diagram Type of burner...
  • Page 100 Code 1 Coding in the delivered condition Possible change Max. boiler temp. º º DHW priority A1 Summer econ. A1 DHW priority M2/M3 Summer econ. M2/M3 Flow min. temp. M2/M3 º º Flow max. temp. M2/M3 º º...
  • Page 101 Code 2...
  • Page 102 Code 2 Calling up code 2...
  • Page 103 Code 2 Summary Coding in the delivered condition Possible change System diagram Boiler/burner º º Boiler/burner (two-stage) heating mode ¢...
  • Page 104 Code 2 Coding in the delivered condition Possible change Boiler/burner (two-stage) cylinder loading ¢ ¢ Boiler/burner Boiler/burner (modulating) These adjustments are matched to Vitocrossal.
  • Page 105 Code 2 Coding in the delivered condition Possible change Boiler/burner º ¢ ¢...
  • Page 106 Code 2 Coding in the delivered condition Possible change Boiler/burner º º Domestic hot water º º ¨ Safety instruction H Observe the max. permissible DHW temperature H Change the control thermostat setting "R" º...
  • Page 107 Code 2 Coding in the delivered condition Possible change Domestic hot water...
  • Page 108 Code 2 Coding in the delivered condition Possible change Domestic hot water...
  • Page 109 Code 2 Coding in the delivered condition Possible change General ¢ Please note: Please note: Coding address "82" to "87" only possible if code "81: 1" has been selected.
  • Page 110 Code 2 Coding in the delivered condition Possible change General ¢...
  • Page 111 Code 2 Coding in the delivered condition Possible change General...
  • Page 112 Code 2 Coding in the delivered condition Possible change Boiler circuit/mixer circuit º º º º º º º º º º º º ¨ When selecting a value º º below 1 ºC there will be º º a risk of pipes outside º...
  • Page 113 Code 2 Coding in the delivered condition Possible change Boiler circuit/mixer circuit ¨ Observe the note for coding address "A3". º º...
  • Page 114 Code 2 Coding in the delivered condition Possible change Mixer circuit Boiler circuit/mixer circuit...
  • Page 115 Code 2 Coding in the delivered condition Possible change Boiler circuit/mixer circuit Change the code for the heating circuit without mixer A1 for boilers without lower temperature limit or for mixer circuit, if the remote control affects that heating circuit.
  • Page 116 Code 2 Coding in the delivered condition Possible change Boiler circuit/mixer circuit Change the code for the heating circuit without mixer A1 for boilers without lower temperature limit or for mixer circuit, if the remote control affects that heating circuit.
  • Page 117 Code 2 Coding in the delivered condition Possible change Boiler circuit/mixer circuit ¢ Change the code for the heating circuit without mixer A1 for boilers without lower temperature limit or for mixer circuit, if the remote control affects that heating circuit.
  • Page 118 Code 2 Coding in the delivered condition Possible change Mixer circuit Boiler circuit/mixer circuit º º Mixer circuit º º º Boiler circuit/mixer circuit Change the code for the heating circuit without mixer A1 for boilers without lower temperature limit or for mixer circuit, if the remote control affects that heating circuit.
  • Page 119 Code 2 Coding in the delivered condition Possible change Mixer circuit Boiler circuit/mixer circuit º º º...
  • Page 120 Code 2 Coding in the delivered condition Possible change Boiler circuit/mixer circuit Mixer circuit Please note: Observe the screed supplier's instructions.
  • Page 121 Code 2 Coding in the delivered condition Possible change Boiler circuit/mixer circuit The party mode ends automatically in heating program "rw", when the system changes over to operation with standard room temperature.
  • Page 122 Screed drying function diagram Temperature time profile 1 (code "F1 : 1") Temperature time profile 2 (code "F1 : 2") Temperature time profile 3 (code "F1 : 3") Temperature time profile 4 (code "F1 : 4")

  • Page 123: Burner Switching Hysteresis

    Burner switching hysteresis Switching hysteresis 4 K (code "04 : 0") Heat demand-dependent switching hysteresis ERB50 function (code "04 : 1") ERB80 function (code "04 : 2")

  • Page 124: Parts List

    Parts list When ordering spare parts: Parts fÖ fÖ TÜV aBÖ fA lÖ aBA §...
  • Page 125 Parts list 125/126...
  • Page 126 Connection and wiring diagram 127/128...
  • Page 127 Connection and wiring diagram fÖ gÖ aBÖ º º º º º Low voltage plug § Plug 230 V~ sÖ...

  • Page 128: Specification

    Specification sÖ lÖ gÖ º Total max. 4 A º...

  • Page 129: Settings And Equipment

    Settings and equipment Function in as delivered condition Modified function º º º º Remote control With remote control Electronic maximal limit H Heating circuit A1 º º H Mixer circuit M2 º º H Mixer circuit M3 º º Electronic minimum limit H Heating circuit A1 º...
  • Page 130 Settings and equipment Function in as delivered condition Modified function Heating circuit pumps Heating circuit A1...
  • Page 131 Settings and equipment Function in as delivered condition Modified function Mixer circuit M2 Mixer circuit M3 Frost protection º º º º Switching hysteresis j ERB50 function j ERB80 function...
  • Page 132 Settings and equipment Function in as delivered condition Modified function Heating system with DHW heating: Heating system with DHW heating º º º...
  • Page 133 Settings and equipment Connected accessories...

  • Page 134: Keyword Index

    Keyword index...
  • Page 135 Keyword index aBÖ...
  • Page 136 Keyword index...

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