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Viessmann VITOTRONIC 300 GW2B, Installation And Service Instructions Manual

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Viessmann VITOTRONIC 300 GW2B Installation And Service Instructions Manual Download Page 13

13

5693 982 - 04

Vitotronic 300, GW2B Installation and Service

Preparing for Installation

System Example 2

Single boiler system: Boiler with shunt pump for return 

temperature raising

Hydraulic installation scheme

Note:

  This scheme is a basic example without 

shut-off  devices  or  safety  equipment.                                  

This does not replace the need for professional 

planning on site.

Summary of Contents for VITOTRONIC 300 GW2B

Page 1: ...pensated digital boiler control units For use with Boiler models VD2A VD2 and CT3 for use by heating contractor Installation and Service Instructions Read and save these instructions for future refere...

Page 2: ...d related product documentation must be read and followed Failure to do so renders the warranty null and void Licensed professional heating contractor The installation adjustment service and maintenan...

Page 3: ...ation scheme 22 Mixing valve extension PCB 24 Required code 24 System Example 4 25 Single boiler system with Vitocrossal 25 Equipment required 26 Electrical installation scheme 28 Mixing valve extensi...

Page 4: ...upply 53 Changing the Language 56 Setting the Date and Time 56 Testing the High Limits Safety Cut out 56 Matching the Coding Addresses to the System Version 57 Checking Actuator and Sensors 58 Adjusti...

Page 5: ...ontents Connection and Wiring Diagram Type GW2B 120 Sensors 124 Outside Temperature Sensor 125 Flue Gas Temperature Sensor 125 Extension Kit Mixing Valve 126 Extension EA1 Accessory optional 127 Type...

Page 6: ...onic 300 GW2B Installation and Service 5693 982 04 6 Preparing for Installation Designations in the System Examples In the following system examples the Vitotronic 300 type GW2B is used as the control...

Page 7: ...em Example 1 Preparing for Installation Single boiler system Boiler with Therm Control Hydraulic installation scheme Note This scheme is a basic example without shut off devices or safety equipment Th...

Page 8: ...t 2 qW Heating circuit pump M2 Mixing valve extension kit qQ Supply temperature sensor M2 as contact temperature sensor and qE Mixing valve motor M2 or Supply temperature sensor M2 as qQ Contact tempe...

Page 9: ...eW 3 digital inputs External heating program changeover separately adjustable for heating circuits 1 to 3 External demand External blocking with fault message input Fault message input Short term oper...

Page 10: ...Vitotronic 300 GW2B Installation and Service 5693 982 04 10 Preparing for Installation System Example 1 continued Electrical installation scheme Main PCB 120V...

Page 11: ...11 5693 982 04Vitotronic 300 GW2B Installation and Service Preparing for Installation System Example 1 continued Main PCB LV connections...

Page 12: ...installed downstream via temperature sensor T1 in heating systems with heating circuit control units that are not connected to the boiler control unit via LON Required code 4C 2 General group Use of...

Page 13: ...allation System Example 2 Single boiler system Boiler with shunt pump for return temperature raising Hydraulic installation scheme Note This scheme is a basic example without shut off devices or safet...

Page 14: ...on site 8 DHW tank 9 DHW tank temperature sensor STS qP DHW pump UPSB qQ DHW recirculation pump ZP qW Heating circuit 2 qR Heating circuit pump M2 Mixing valve extension kit qE Mixing valve motor for...

Page 15: ...r mixing valve Close eP Extension EA1 eQ 1 analog input 0 10V Specification of the set boiler water temperature eW 3 digital inputs External heating program changeover separately adjustable for heatin...

Page 16: ...Vitotronic 300 GW2B Installation and Service 5693 982 04 16 Preparing for Installation System Example 2 continued Electrical installation scheme Main PCB 120V...

Page 17: ...17 5693 982 04Vitotronic 300 GW2B Installation and Service Preparing for Installation System Example 2 continued Main PCB LV connections...

Page 18: ...A1 to close the downstream mixing valves 0d 1 Boiler group Temperature sensor T1 Therm Control affects the mixing valves of downstream heating circuits factory set condition Wiring diagram Closing mi...

Page 19: ...stem Example 3 Single boiler system Boiler with shunt pump and 3 way mixing valve for return temperature control Hydraulic installation scheme Note This scheme is a basic example without shut off devi...

Page 20: ...Contact temperature sensor or Immersion temperature sensor rR ON OFF switch on site 9 DHW tank qP DHW tank temperature sensor STS qQ DHW pump UPSB qW DHW recirculation pump ZP qE Heating circuit 2 qT...

Page 21: ...10V Specification of the set boiler water temperature eW 3 digital inputs External heating program changeover separately adjustable for heating circuits 1 to 3 External demand External blocking with...

Page 22: ...Vitotronic 300 GW2B Installation and Service 5693 982 04 22 Preparing for Installation System Example 3 continued Electrical installation scheme Main PCB 120V...

Page 23: ...23 5693 982 04Vitotronic 300 GW2B Installation and Service Preparing for Installation System Example 3 continued Main PCB LV connections...

Page 24: ...4 24 Preparing for Installation System Example 3 continued Mixing valve extension PCB Required code 0C 1 Boiler group Constant return temperature control 4E 1 General group Connection plug gS A1 motor...

Page 25: ...Preparing for Installation System Example 4 Single boiler system with Vitocrossal Hydraulic installation scheme Note This scheme is a basic example without shut off devices or safety equipment This d...

Page 26: ...Heating circuit pump M2 Mixing valve extension kit qQ Supply temperature sensor M2 as contact temperature sensor and qE Mixing valve motor M2 or Supply temperature sensor M2 as qQ Contact temperature...

Page 27: ...ater temperature eW 3 digital inputs External heating program changeover separately adjustable for heating circuits 1 to 3 External demand External blocking with fault message input Fault message inpu...

Page 28: ...Vitotronic 300 GW2B Installation and Service 5693 982 04 28 Preparing for Installation System Example 4 continued Electrical installation scheme Main PCB 120V...

Page 29: ...29 5693 982 04Vitotronic 300 GW2B Installation and Service Preparing for Installation System Example 4 continued Main PCB LV connections...

Page 30: ...ut Therm Control temperature sensor System Extension Rated current 2 A If the circulation pump power consumption is above 2 A use a contactor relay Required code Group Function 33 3 1 General Function...

Page 31: ...mounting surface with four fasteners 2 Fasten the junction box to the backplate with two fasteners 3 Install the control rear section to the junction box housing Hook the control to the backplate tab...

Page 32: ...erface cover to the control cover 3 Release the stay bar and lock in position 4 Insert the plug from the programming unit to the control Note Route the ribbon cable through retainer A 5 Return the sta...

Page 33: ...e Control Unit Installation 1 Remove the junction box cover screws and remove the cover 2 Remove the front housing screws 3 Swing up the front part of the control housing 4 Position the stay bar so th...

Page 34: ...with VD2 and VD2A accessory for CT3 aJB Return temperature sensor T2 accessory or Temperature sensor primary store system optional accessory not used aVD External hook up aVG KM BUS participant acces...

Page 35: ...300 GW2B Installation and Service Overview of Electrical Connections continued Legend A Vitotronic 300 GW2B B Junction box C Burner motor power supply refer to page 53 f Vitotronic 300 GW2B power supp...

Page 36: ...shared between all 120V outputs Legend A 120V pump output B To the Vitotronic control unit C Junction box Available pump connections s M1 A1 Heat circuit pump switching contact shunt pump sL Boiler p...

Page 37: ...estrain cables with zip tie to cable lead Inserting the Boiler Coding Card Only use the boiler coding card supplied with the boiler see table in chapter Components Insert the boiler coding card into s...

Page 38: ...mit until the slot points to the desired temperature 3 Re fit the fuse box WARNING Disconnect power to the control and burner A B Legend A LON communication module accessory B Vitotronic 300 GW2B Non...

Page 39: ...tion Sequence Legend Outside temperature sensor Boiler temperature sensor A DHW tank temperature sensor 1 B DHW tank temperature sensor 2 for primary store system optional accessory not used aJA Therm...

Page 40: ...power supply to the control contains overcurrent protection with a minimum rating of 15A disconnect 2 Connect power supply wire to the connection f terminals 11 N and G on the DIN rail inside the junc...

Page 41: ...ied C Pump D Power supply w disconnect and protection Contactor specification 120VAC 1A Legend A DIN rail B Contactor relay field supplied C Pump D Power supply w disconnect and protection Contactor s...

Page 42: ...cket gS on the control 4 Fasten cable with tie 5 Connect black wire of the adaptor to terminals 8 9 or 10 on the Din rail 6 Connect valve actuator wires to the adaptor terminals Legend A 24V Mixing Va...

Page 43: ...rconnection details 1 Remove jumper between terminals 12 and 15 2 Make connection as shown in diagram Legend aBH Power supply for accessories aB Connection for external equipment A Low water cut off t...

Page 44: ...2 Connect dry contact Controlled switch off takes place when the contact is opened External Burner Blocking 150 Remove jumper from DIN terminals 16 and 17 Note Connect only safety shutdown equipment d...

Page 45: ...Max pump current 2 FLA Mandatory Coding Address Changes 0C 5 Modulating isolation valve independant of boiler water temperature 0d 2 Switching contact 4A 1 17A Sensor installed 4b 1 17B Sensor instal...

Page 46: ...Connection Note Live contacts lead to short circuits or phase failure The external connection must be floating Codes Plug aVH Extension EA1 No code required Set 5d 5E or 5F in the General group to 2...

Page 47: ...ter temperature Installation Sequence Connection Note Live contacts lead to short circuits or phase failure The external connection must be floating Codes Plug aVD Extension EA1 Set coding address 99...

Page 48: ...ating circuits via coding address 99 in the General group Note Live contacts lead to short circuits or phase failure The external connection must be floating Connection at plug aVD External Changeover...

Page 49: ...re DHW heating in accordance with coding address 64 in the DHW group Codes Plug aVD Extension EA1 Via coding address 91 in the General group the function can be assigned to the heating circuits Set 5d...

Page 50: ...DIN Rail inside connection enclosure refer to installation manual of Combustion Air Device Adaptor 3 Remove jumper between terminals 16 and 17 4 Make connection as shown in the diagram Wire BK2 must...

Page 51: ...urner and boiler control 2 Connect plugs fA and plug l to respective counter plugs in boiler control unit 3 Connect the 7 pole plug fA and the 3 pole plug l to the burner Terminal codes 1 2 3 Control...

Page 52: ...llow the burner manufacturer s connection drawings for Viessmann controls Note Write the terminal numbers or markings on the drawing for future reference For burner without plug in connection The burn...

Page 53: ...disconnect 2 Connect power supply wire to the Connection f terminals 11 N and G on the DIN rail inside the connection enclosure Burner Connection Motor Power Supply Supply power must be sufficient to...

Page 54: ...r motor power supply connection For burners with 240VAC 1PH power supply and connection in conduit See burner manual for correct fuse and wire gauge sizing and specific connections for Viessmann contr...

Page 55: ...ect fuse and wire gauge sizing and specific connections for Viessmann controls 1 Disconnect power to burner and boiler control 2 Connect 3PH power to the terminals 21 22 23 and 24 on the DIN rail insi...

Page 56: ...water temperature has dropped approx 15 to 20 K below the selected safety temperature 4 Reset the high limit safety cut out by pressing reset button Commissioning Changing the Language Setting the Da...

Page 57: ...ct 25 Note Values up to and including 199 kW can be entered directly 09 Hundreds of the maximum burner output Example Max burner output 225 kW select 2 0A Ratio of output base load to maximum burner o...

Page 58: ...o maximum burner output in percent Example Base load output 72 kW Max burner output 225 kW 72 kW 225 kW 100 32 05 Ratio of partial output at b of the servomotor runtime to maximum burner output in per...

Page 59: ...ut Mixing valve closed enabled heating circuit with mixing valve M2 Htg circ pump HC3 ON Output for heating circuit pump enabled heating circuit with mixing valve M3 Mixing valve HC3 Open Output Mixin...

Page 60: ...higher the boiler water or supply temperature The room temperature again depends on the boiler water or the supply temperature Adjusting Heating Curves Commissioning Slope Outside temperature in C Se...

Page 61: ...egend A Boiler water temperature or supply temperature in F C B Outside temperature in F C C Set room temperature in F C D Heating circuit pump OFF E Heating circuit pump ON Changing the reduced set r...

Page 62: ...tem with Vitotronic 200 H and Vitocom 100 LAN1 Set the LON participant numbers and further functions via code 2 see the following table Note In the same LON system the same participant number cannot b...

Page 63: ...list with Delete list participant list is updated Note During the participant check the display for the relevant participant shows the participant no and Wink for approx 1 min Boiler control unit Vit...

Page 64: ...a RJ45 plugs The Viessmann LON system always requires the cores 1 and 2 and the screen The cores are interchangeable The installation is therefore safe from pole errors Connection with Viessmann LON c...

Page 65: ...check Service PIN Heating circuit 3 HC3 Coding level 2 Fault history Service functions Terminate service Reset data Service reset Service menu overview Press OK and simultaneously for approx 4 sec Pre...

Page 66: ...ing data 1 Press OK and simultaneously for approx 4 sec 2 Diagnosis 3 Select required group e g General Scanning Operating Data In the brief scan you can scan temperatures software versions and connec...

Page 67: ...ystem number Node address 0 0 8 SNVT config 0 Auto 1 Tool Software version Communic coproc Software version Neuron Chip Number of LON participants Heating circuit HC1 Heating circuit HC2 Heating circu...

Page 68: ...et Note The selected service parameters for hours run and time interval restart at 0 Calling up acknowledged maintenance messages Extended menu 1 2 Service Fault Display Calling up acknowledged fault...

Page 69: ...the outside temperature sensor RF close to the wireless base De register and then re register the outside temperature sensor Replace if necessary see separate installation and service instructions 30...

Page 70: ...y pump ON Set DHW temperature set supply temperature Priority control is cancelled or With primary store system DHW tank heating is started and stopped by DHW tank temperature sensor 2 Short circuit D...

Page 71: ...utput reduction mixing valve return temperature control Open Lead break temperature sensor aJA Check temperature sensor aJA see page 124 Without temperature sensor Set code 4A 0 in the General group 7...

Page 72: ...ck sensor at the solar control unit see separate installation and service instructions 98 Control mode Lead break temperature sensor Connection at the solar control module Check temperature sensor see...

Page 73: ...ernal safety equipment Check safety equipment and reset if required A1 Boiler cools down Fault safety equipment at X3 of plug in adaptor 2 for external safety equipment Check safety equipment and rese...

Page 74: ...gas temperature sensor see page 125 Without flue gas temperature sensor Set code 1F 0 in the Boiler group bA Mixing valve Closed Communication error PCB extension for heating circuits 2 and 3 with mix...

Page 75: ...ck the system water level of the system reset low water indicator C9 Boiler cools down Fault maximum pressure limiter at X3 of plug in adaptor 1 for external safety equipment Check system pressure res...

Page 76: ...t Remove fault at appliance concerned d8 Control mode Input DE3 at extension EA1 reports a fault Remove fault at appliance concerned dA Control mode without room influence Short circuit room temperatu...

Page 77: ...l be regulated subject to the respective boiler Function Description Brief description H The boiler water temperature is regulated by starting and stopping the burner or through modulation H The set b...

Page 78: ...heat demand high heat demand Time ON OFF set Burner low heat demand average heat demand high heat demand Time ON OFF set Burner ERB80 function Code 04 2 Subject to heat demand values between 6 and 20...

Page 79: ...flow rate in the startup phase e g after a weekend shutdown must be able to be reduced by at least 50 H Also affects the heating circuits of a Vitotronic 200 H installed downstream Raising the return...

Page 80: ...t be controlled e g older heating systems or commercial nurseries Function Temperature sensors T1 and T2 capture the return temperature at different test points The shunt pump is started via temperatu...

Page 81: ...res Activating party mode Changeover from central heating with reduced temp to central heating with standard temp Start optimization coding address b7 in the Heating circuit group Quick heat up will s...

Page 82: ...economy function coding address A7 in the Heating circuit group Heating circuit pump logic economy mode The heating circuit pump is switched off set supply temperature set to 32 F 0 C if the outside...

Page 83: ...tial temperature 8 K E Lower boiler water temperature defaulted by the boiler coding card Supply temperature control Raising the reduced room temperature During operation with reduced room temperature...

Page 84: ...xing valve motor receives the signal Mixing valve closed The signal duration lengthens with an increasing control differential The duration of pauses reduces with an increasing control differential Fu...

Page 85: ...mp can be adjusted individually for each heating circuit Function Description Brief description H The DHW tank temperature control is a constant temperature control This is the result of starting and...

Page 86: ...ystems Set the following codes 55 3 in the DHW group 4C 1 4E 2 in the General group System with solar control unit A third set DHW temperature can be specified via coding address 67 in the DHW group T...

Page 87: ...if a lot of hot water is drawn off The DHW tank heating will be switched off early if no hot water is drawn off DHW tank goes cold H Set value 2 5 K adjustable via coding address 59 or H Actual DHW te...

Page 88: ...want to reset all codes to their factory set condition Select Standard setting in Coding level 1 Note This also resets codes on coding level 2 Code 1 Note H The codes are displayed as plain text H Co...

Page 89: ...1 heating circuit 1 One heating circuit with mixing valve M2 heating circuit 2 without DHW heating automatic recognition 6 One heating circuit A1 heating circuit 1 One heating circuit with mixing valv...

Page 90: ...99 1 boiler control unit 10 97 Vitotronic 200 H 98 Vitogate 99 Vitocom Note Each number must only be assigned once Detached house apartment building 7F 1 Detached house 7F 0 Apartment building Separa...

Page 91: ...is displayed Burner service in 100 hours 21 0 No service interval hours run selected 21 1 to 21 100 The number of hours run before the burner should be serviced is adjustable from 100 to 10 000 h 1 s...

Page 92: ...circuit pump is reduced if the actual DHW temperature is 5 K below the maximum DHW tank temperature 0A 0 Stagnation time reduction is disabled 0A 1 to 0A 40 Value for stagnation time reduction is adj...

Page 93: ...circuit pump and mixing valve A2 0 Without DHW tank priority applicable to heating circuit pump and mixing valve A2 1 DHW tank priority applies only to the mixing valves A2 3 to A2 15 Modulating prior...

Page 94: ...ction description on page 82 A9 0 Without pump idle time A9 1 to A9 15 With pump idle time adjustable from 1 to 15 1 short idle period 15 long idle period Weather compensated room temperature hook up...

Page 95: ...he General group Heating program switches to Constant central heating with reduced room temperature or Standby mode subject to the settings of the set reduced room temperature d5 1 The heating program...

Page 96: ...limit adjustable from 50 to 76 F 10 to 60 C F8 61 Function disabled End temperature raising F9 14 Temperature limit for raising the reduced set room temperature 7 F 14 C see example on page 83 F9 10...

Page 97: ...you want to reset all codes to their factory set condition Select Standard setting in Coding level 2 Note This also resets codes from coding level 1 Code 2 Note H In coding level 2 all codes are acce...

Page 98: ...ing valve M2 heating circuit 2 without DHW heating automatic recognition 6 One heating circuit without mixing valve A1 heating circuit 1 One heating circuit with mixing valve M2 heating circuit 2 with...

Page 99: ...or external safety equipment 30 1 With plug in adaptor 1 for external safety equipment automatic recognition 31 1 Without plug in adaptor 2 for external safety equipment 31 1 With plug in adaptor 2 fo...

Page 100: ...tic recognition 54 2 With Vitosolic 200 automatic recognition 54 3 With solar control module type SM1 without auxiliary function automatic recognition 54 4 With solar control module type SM1 with auxi...

Page 101: ...l blocking with fault message 5F 5 Fault message input 5F 6 Brief operation DHW recirculation pump push button function Setting of runtime for DHW recirculation pump in coding address 12 in the Genera...

Page 102: ...DHW heating possible 80 6 A fault message is displayed if a fault occurs for at least 30 sec 80 0 Immediate fault message 80 2 to 80 199 The minimum fault duration until a fault message is issued is...

Page 103: ...ating circuits Heating circuit without mixing valve A1 heating circuit 1 91 2 Heating circuit with mixing valve M2 heating circuit 2 91 3 Heating circuits without mixing valve A1 heating circuit 1 and...

Page 104: ...ing external Mixing valve closed see page 55 99 1 No function 99 2 External Mixing valve closed Heating circuit with mixing valve M2 heating circuit 2 99 3 No function 99 4 External Mixing valve close...

Page 105: ...with mixing valve M2 heating circuit 2 and M3 heating circuit 3 9A 7 No function 9b 70 Set supply temperature for external demand 158 F 70 C 9b 0 to 9b 127 Set value adjustable from 32 to 261 F 0 to...

Page 106: ...ondition specified by the boiler coding card 05 0 Linear burner curve 05 1 to 05 99 Non linear burner curve PT Pmax 100 PT in kW Partial output at g of the servomotor runtime Pmax in kW Maximum output...

Page 107: ...urner start Factory set condition specified by the boiler coding card 16 0 to 16 15 Offset adjustable from 0 to 15 K 1A Start optimization in min Factory set condition specified by the boiler coding c...

Page 108: ...arried out 26 0 Burner fuel consumption stage 1 No count if 26 0 and 27 0 are programmed 26 1 to 26 99 Input of 0 1 to 9 9 1 step 0 1 L h or gallons h Note Values of coding addresses 26 and 27 are add...

Page 109: ...highest system supply temperature demand Scan of the temperature in the Diagnosis menu General Common dem temp see page 81 5A 1 For DHW heating The set supply temperature is determined by the DHW tan...

Page 110: ...y boiler specific parameters Observe the setting of coding address 56 68 8 With 2 DHW tank temperature sensors code 55 2 DHW tank heating stop point at set value x 0 8 68 2 to 68 10 Factor adjustable...

Page 111: ...ture control between the collector temperature and actual DHW temperature is adjustable from 5 to 20 K 04 4 Controller amplification of the speed control 4 K 04 1 to 04 10 Controller amplification adj...

Page 112: ...medium 0E 2 Calculation of solar yield with water as heat transfer medium never adjust as operation is only possible with Viessmann heat transfer medium 0E 0 Calculation of solar yield switched off 0F...

Page 113: ...fferential for central heating backup is adjustable from 2 to 30 K 23 4 Stop temperature differential for central heating backup 4 K Switching output sS is switched off when the temperature at sensor...

Page 114: ...5 0 to 25 100 Stop temperature for thermostat function is adjustable from 0 to 100 K 26 1 Priority for DHW tank 1 with alternate heating Only when setting code 20 8 26 0 Priority for DHW tank 1 withou...

Page 115: ...e control A2 2 DHW tank priority applicable to heating circuit pump and mixing valve A2 0 Without DHW tank priority applicable to heating circuit pump and mixing valve A2 1 DHW tank priority applies o...

Page 116: ...tion Possible change A6 36 Extended economy control disabled A6 5 to A6 35 Extended economy control enabled i e the burner and heating circuit pump will be stopped and the mixing valve closed at a var...

Page 117: ...ture hook up b2 8 With remote control and for the heating circuit operation with room temperature hook up must be programmed 2 Room influence factor 8 b2 0 Without room influence b2 1 to b2 64 Room in...

Page 118: ...temperature C5 1 to C5 127 Minimum limit adjustable from 34 to 261 F 1 to 127 C limited by boiler specific parameters C6 75 Electronic maximum supply temperature limit set to 167 F 75 C C6 10 to C6 12...

Page 119: ...ings of coding addresses 5d 5E 5F in the General group as well as d5 and d8 in the Heating circuit group F2 0 No time limit 1 F2 1 to F2 12 Time limit adjustable from 1 to 12 h 1 F8 5 Temperature limi...

Page 120: ...ns Legend A1 PCB extension for heating circuits 2 and 3 with mixing valve A2 PCB low voltage A3 PCB 120V A6 Programming unit A7 Optolink PCB emissions test switch A8 PCB A9 Boiler Coding card A10 LON...

Page 121: ...circuit pump on site f Power supply 120V 60 Hz fA Oil gas burners g Output for multiple fault messages gS Motor for 3 way mixing valve return temperature control or Motor for 3 way mixing valve primar...

Page 122: ...mary store system aJA Therm control temperature sensor or Return temperature sensor T1 aJB Return temperature sensor T2 or Temperature sensor primary store system Optional accessory not used aG Flue g...

Page 123: ...vice Connection and Wiring Diagram Type GW2B continued Designs Legend Supply temperature sensors s Heating circuit pumps f Power supply PCB extension for heating circuits 2 and 3 with mixing valve gS...

Page 124: ...perature sensor in the mixing valve extension kit is a contact temperature sensor H The room temperature sensor is connected at terminals 3 and 4 in the Vitotrol 300A Sensors Installation and service...

Page 125: ...Depending on the result replace the lead or the outside temperature sensor Outside temperature sensor When an entered limit in the Vitotronic 300 is reached see coding address 1F in Boiler group a se...

Page 126: ...ull 3 PIN plug A in the mixing valve motor and reinsert turned through 180 2 Check the rotational direction Mixing valve Open Mixing valve Closed Changing the rotational direction if required Componen...

Page 127: ...essage input External demand with minimum boiler water temperature Fault message input Brief operation of the DHW recirculation pump When connecting external contacts observe the requirements of safet...

Page 128: ...upply plug f 3 pieces 0105 Plug ab 0106 Plug g 3 pieces 0108 Plugs aVD aVG aVH 3 pole 0109 Burner plugs fA l aBA and a A Ordering parts The following information is required H Serial no see type plate...

Page 129: ...129 5693 982 04Vitotronic 300 GW2B Installation and Service Type GW2B continued Parts Lists...

Page 130: ...relay output breaking capacity at 120V s Heating circuit pump or Primary pump primary store system or Circulation pump flue gas water heat exchanger or Switching output 2 A 3 sA Circulation pump for...

Page 131: ...131 5693 982 04Vitotronic 300 GW2B Installation and Service...

Page 132: ...Technical information subject to change without notice Printed on environmentally friendly recycled and recyclable paper 5693 982 04 Vitotronic 300 GW2B Installation and Service...

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