Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual Download Page 3

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General information

Product Information

Vitotronic 300, Model GW2

For installation in or mounting on
Viessmann boilers only.

Applicable to the following control
units

Order No. 7134 555, 7143 156, 7511 362 from
Serial No. 7143 000



Order No. 7134 555, 7143 156, 7511 362 from
Serial No. 7187 101



Order No. 7134 555, 7143 156, 7511 362 from
Serial No. 7248 248



5285

941

Summary of Contents for VITOTRONIC 300 GW2

Page 1: ...l GW2 Outdoor reset logic digital boiler and heating circuit control unit Certified as a component part of Viessmann boilers only Read and save these instructions for future reference IMPORTANT for us...

Page 2: ...Requirements Advice to owner Once the installation work is complete the heating contractor must familiarize the system operator ultimate owner with all equipment as well as safety precautions requirem...

Page 3: ...tion in or mounting on Viessmann boilers only Applicable to the following control units Order No 7134 555 7143 156 7511 362 from Serial No 7143 000 Order No 7134 555 7143 156 7511 362 from Serial No 7...

Page 4: ...r and other sensors 26 Connection of the pumps 30 Connection of boiler return mixing valve or modulating valve actuator 32 Making space for accessory adaptors on the DIN rail CM2 only 34 Connections t...

Page 5: ...mation 77 Scanning and resetting the Service display 78 Troubleshooting Troubleshooting steps 79 Diagnosis 80 Functional description Boiler temperature control 86 Heating circuit control 87 DHW tank t...

Page 6: ...erature sensor T2 s A1 Close mixing valves with external heating circuit controls s M2 Heating circuit pump mixing valve circuit 2 s M3 Heating circuit pump mixing valve circuit 3 sA DHW pump sK DHW r...

Page 7: ...er Temperature sensor T1 Wiring of the temperature sensor T1 in heating systems with heating circuit control units which are not connected via the LON BUS to the boiler control unit Coding required 4C...

Page 8: ...HW tank temperature sensor aJA Therm Control temperature sensor s M2 Heating circuit pump mixing valve s M3 Heating circuit pump mixing valve s A1 Closing the mixing valves with external heating circu...

Page 9: ...e Wiring diagram Wiring of the Therm Control in heating systems with heating circuit control units are not connected to the boiler control unit via the LON Required coding Change 4C to 2 use the plug...

Page 10: ...erature sensor T2 s M2 Heating circuit pump mixing valve circuit 2 s M3 Heating circuit pump mixing valve circuit 3 sA Circulation pump for heating the DHW tank sK DHW re circulation pump sL Shunt pum...

Page 11: ...s proportionally closed via the temperature sensor T1 and the minimum return temperature is assured The shunt pump must be sized so that bypassed water accounts for approx 30 of the total flow rate of...

Page 12: ...ure sensor s A1 Heating circuit without mixing valve if installed s M2 Heating circuit pump mixing valve circuit 2 s M3 Heating circuit pump mixing valve circuit 3 sA Circulation pump for heating the...

Page 13: ...door re set boiler control unit Viessmann modulating burner is operated through Vitotronic control The boiler water temperature which is established in the heating mode is higher than the maximum heat...

Page 14: ...M3 Supply temperature sensor mixing valve circuit 3 Boiler temperature sensor DHW tank temperature sensor s A1 Heating circuit without mixing valve if installed s M2 Heating circuit pump mixing valve...

Page 15: ...eturn connection at the top those with the lower temperatures to the return connection at the bottom Please note At least 15 of the take off from the rated output must be connected to the return conne...

Page 16: ...3 Boiler temperature sensor DHW tank temperature sensor s A1 Heating circuit without mixing valve if installed s M2 Heating circuit pump mixing valve circuit 2 s M3 Heating circuit pump mixing valve c...

Page 17: ...ans of the outdoor re set boiler control unit Viessmann modulating burner is operated through Vitotronic control The boiler water temperature which is established in the heating mode is higher than th...

Page 18: ...g Vitotrol remote control accessory aVH Connection of external equipment Line voltage motherboard s A1 Heating circuit pump or control output sA Circulation pump for heating the DHW tank accessory sK...

Page 19: ...Installation 19 Overview of electrical connections for VD2 VD2A CT3 only 5285 941 01...

Page 20: ...Installation 20 Overview of electrical connections for CM2 only 5285 941 01...

Page 21: ...1 Run the cables from the connection enclosure into the control unit 2 Apply strain relief to cables see below Cables with moulded strain relief clamp Connect cable and strain relief clamp OR Fasten...

Page 22: ...7820 144 Vitorond 200 VD2 VD2A 1020 7820 142 Vitocrossal 200 CM2 1041 7820 145 1 Push the boiler coding card through the recess in the cover and insert it in plug in location X7 5285 941 01 For matchi...

Page 23: ...et to 110 C 230 F 3 Re fit the fuse box Please note Adjustment is required for the Vitocrossal 300 See Service Instructions for Vitocrossal 300 Non condensing boiler VD2 VD2A C F Condensing boiler CT3...

Page 24: ...s break off the cams identified by the shaded areas in the Fig from the stop dial A 75 to 100 C 167 to 212 F 3 Fit the selector knob R so that the marking is in the centre of the selected range Please...

Page 25: ...g wall of the building In the case of multi storey buildings it should be mounted in the upper half of the second storey Make sure that the sensor is not located over windows doors and air vents nor i...

Page 26: ...60 140 578 597 616 3 Compare the value measured with the current temperature If the value differs significantly check installation and if necessary replace sensor Technical data Degree of protection I...

Page 27: ...tems without domestic hot water heating Do not connect the DHW tank temperature sensor Check the sensor 1 Disconnect plug in the terminal compartment of the boiler control 2 Measure resistance of sens...

Page 28: ...terminals 1 and 2 of the plug Return temperature in C F Resistance in 30 86 40 104 60 140 569 592 643 3 Compare the value measured with the current temperature If the value differs significantly chec...

Page 29: ...ls 1 and 2 of the plug Flue gas temperature in C F Resistance in 180 176 160 320 200 392 650 800 880 3 Compare the value measured with the actual temperature If the value differs significantly check i...

Page 30: ...120 VAC pumps Note The maximum power consumption of all pumps is 4A Rated current max 2 FLA Recommended connection cable AWG 14 Use contactor for pumps with higher current rating Connect the 3 wire ca...

Page 31: ...VAC pumps Note The maximum power consumption of all pumps is 4A Rated current max 2 FLA Recommended connection cable AWG 14 Use contactor for pumps with higher current rating Connect the 3 wire cable...

Page 32: ...A Recommended connection wire size AWG 14 Part No 7134 559 Operating time 5 to 199 sec selected via coding address 40 1 120V valve adaptor 2 120V valve actuator 1 24V valve adaptor 2 24V valve actuato...

Page 33: ...nection wire size AWG 14 Operating time 5 to 199 sec selected via coding address 40 1 120V Valve Adaptor 2 120V valve actuator 1 24V Valve Adaptor 2 24V valve actuator 1 Disconnect power to control 2...

Page 34: ...pare DIN terminals 23 24 25 and 26 one at a time Place the screwdriver between the rail and the base of the terminal and turn the screwdriver clockwise Discard the removed terminals 3 Re install the D...

Page 35: ...when the contact is opened Emergency operation Move jumper from terminals 16 and 17 to terminals 17 and 18 5285 941 01 The terminals should be used for safety switch off purposes only e g through a h...

Page 36: ...VAC 60 Hz Rated current max 2 FLA Recommended connection wire size AWG 14 1 Disconnect power to control and burner 2 Connect the compiled failure alarm as shown in the diagram A Connect terminal strip...

Page 37: ...Hz Rated current max 2 FLA Recommended connection wire size AWG 14 1 Disconnect power to control and burner 2 Connect the compiled failure alarm as shown in the diagram A Connect terminal strip in co...

Page 38: ...t pump is switched off Please note During controlled switch off or Close mixing valves there is no frost protection of the boiler or heating circuits and no minimum boiler water temperature is maintai...

Page 39: ...d by the preset max boiler water temperature or by the value set on the mechanical adjustable high limit The required boiler set point value is set via the coding address 9b External changeover betwee...

Page 40: ...as shown or less 93 200 87 188 87 188 88 190 Single boiler systems Coding 01 1 factory setting When a building automation system is connected only the connections on plug aVD are required The DHW tan...

Page 41: ...odulation can be switched externally The boiler water temperature is limited by the preset maximum boiler water temperature or via the mechanical adjustable high limit The setpoint value is selected v...

Page 42: ...et code 06 to the temperature as shown or less 93 200 87 188 87 188 88 190 Single boiler systems Coding 01 1 factory setting When a building automation system is connected only the connections on plug...

Page 43: ...es modulation can be switched externally The boiler water temperature is limited by the preset maximum boiler water temperature or via the mechanical adjustable high limit The setpoint value is select...

Page 44: ...set code 06 to the temperature as shown or less 93 200 87 188 87 188 88 190 Single boiler systems Coding 01 1 factory setting When a building automation system is connected only the connections on plu...

Page 45: ...mbustion Air Device Adaptor B DIN Rail in connection enclosure Connection of the combustion air blower to adaptor Rated voltage 120 VAC Rating current max 5 FLA Recommended connection wire size AWG 14...

Page 46: ...50 plug and DIN rail connections as shown in the diagram Wire BK2 must be connected to terminal 18 and BK3 to terminal 19 DO NOT reverse Connection of the combustion air blower to adaptor Rated voltag...

Page 47: ...l and burner 2 Make connection as shown in the diagram A Combustion Air Device Adaptor in connection enclosure B Relay 120 VAC coil field supplied C Combustion air damper D End switch rated for 120 VA...

Page 48: ...plug from the Vitotronic control and discard 3 Install new 150 plug supplied attached to flue gas temperature switch 5285 941 01 Please note that the diagram shown is only a simplified conceptual dra...

Page 49: ...n for external equipment 1 Remove jumper between terminals 12 and 15 2 Make connection as shown in diagram 5285 941 01 Please note that the diagram at left is only a simplified conceptual drawing of a...

Page 50: ...er between terminals 21 and 22 2 Make connection as shown in diagram 5285 941 01 Please note that the diagram shown is only a simplified conceptual drawing of a typical low water cut off LWCO device R...

Page 51: ...r fault indicator B4 Connection for burner hours counter A To plug in connection in connection enclosure B To burner 1 Disconnect power to burner and boiler control 2 Connect plugs fA and plug l to re...

Page 52: ...ner f Power supply connection of control unit 120 VAC fA Burner 1st stage l Burner 2nd stage aB Plugs for external equipment a External safety devices remove jumper when connecting b External controll...

Page 53: ...ontrol 2 Connect 240 VAC power to the terminals 21 22 and 23 on the DIN rail inside the connection enclosure Provide fuseable disconnect means according to local codes 3 Connect supplied power cable t...

Page 54: ...de fuseable disconnect means according to local codes 3 Connect supplied power cable to the motor terminals on the burner 4 Connect cable plug to the socket on the DIN rail in the connection enclosure...

Page 55: ...local codes B Terminals 40 C Connection enclosure 1 Ensure that the main power supply to the control contains overcurrent protection with a maximum rating of 15 A and 2 pole disconnect 2 Connect power...

Page 56: ...fault indicator B4 Connection for burner hours counter A To plug in connection in connection enclosure B To burner interface 1 Disconnect power to burner and boiler control 2 Connect plugs fA and plu...

Page 57: ...lock in position at point A 3 Insert the flat cable from the Optolink into plug X20 4 Insert the plug of the programming unit into socket X10 Use cable guides in cover for routing 5 Engage the stay ba...

Page 58: ...lock in position at point A 3 Insert the flat cable from the Optolink into plug X20 4 Insert the plug of the programming unit into socket X10 Use cable guides in cover for routing 5 Engage the stay ba...

Page 59: ...VD2 VD2A CT3 only 1 Remove the cover of the connection enclosure 2 Unscrew the screws from the front housing 3 Swing up the front part of the control housing 4 Position the stay bar so that it suppor...

Page 60: ...low cables to come in contact with hot metal components 2 Mount the control to the control panel 3 Secure the control to the control panel with screws Note Screws to secure control are included with t...

Page 61: ...stay bar open it up and lock in position at point A 3 Insert the flat cable from the Optolink into plug X20 4 Insert the plug of the programming unit into socket X10 Use cable guides in cover for rou...

Page 62: ...e Control Unit CM2 only 1 Remove the control cosmetic cover 2 Unscrew the screws from the front housing 3 Swing up the front part of the control housing 4 Position the stay bar so that it supports the...

Page 63: ...lect the language if required 65 15 Integrate the control unit in the LON BUS system in conjunction with heating circuits connected downstream 66 16 Carry out participant check 67 17 Match the control...

Page 64: ...TEST button Energy saving mode Party mode Hinged cover of programming unit Operating status indicator green Fault indicator red 2 Check assignment of heating circuits Check that the stickers for the...

Page 65: ...ustable high limit R is bridged The burner is switched on until the boiler water temperature reaches the safety temperature and the fixed high limit operates When the burner is switched off by the fix...

Page 66: ...otronic 200 H heating circuit controls and Vitocom 300 connected downstream Participant No 1 Coding 77 1 Participant No 10 Coding 77 10 Participant No 11 Coding 77 11 Participant No 99 Control unit is...

Page 67: ...Consecutive list number 2 Select the required participant with or 3 Activate the check with If communication between the two units is verified Check OK appears in the display If communication is not v...

Page 68: ...ding on the system equipment installed Burner stage 1 ON Burner stage 1 2 ON Burner modulation open Burner modulation neutral Burner modulation closed Output 20 ON Output 29 ON Output 52 open closed n...

Page 69: ...ting drive of the burner is at maximum output 4 Establish the maximum burner out put through the fuel consumption 5 With function Activate Burner mod closed and measure the time it takes for the actua...

Page 70: ...ns digits of the maximum output established in point 4 e g max output 210 kW here set 10 09 hundreds digit of the maximum output established in point 4 e g max output 210 kW here set 2 0A the basic ou...

Page 71: ...lope n 1 4 Shift N 0 See conversion chart on the back of the manual for F 1 Set the desired room temperature Normal room temperature Set the desired day temperature with the set point selector Desired...

Page 72: ...t Press 9 and OK simultaneously for approx 2 seconds Press OK 68 Participant check in conjunction with LON Press w and OK simultaneously for approx 2 seconds Press w and OK simultaneously for approx 1...

Page 73: ...red room temp Current room temp Boiler coding card Scan 1 Scan 2 Scan 3 Scan 4 Scan 5 Scan 6 Scan 7 The damped outdoor temperature can be reset to the current outdoor temperature by pressing D Only di...

Page 74: ...US participant No participant connected Number of participants e g remote control 0 1 2 Free Free 0 1 to F System type System circuit A1 Mixing valve Mixing valve DHW Coding circuit M2 circuit M3 tank...

Page 75: ...version Remote control for system circuit A1 Operating mode of system circuit A1 Coding Without remote control A0 0 With Vitotrol 200 remote control A0 1 With Vitotrol 300 remote control A0 2 0 to F...

Page 76: ...1 8 8 8 8 8 Scan 5 8 Viessmann participant number 0 to F Node address Subnet address system number 0 to F 0 to F 0 to F 0 to F 0 to F 8 8 8 8 8 Scan 6 8 Software version Communication coprocessor 0 to...

Page 77: ...Output 20 ON OFF Output 29 ON OFF Output 52 Open Closed DHW tank pump ON OFF DHW pump ON OFF Heating circuit pump ON OFF Mixing valve Open Closed Different languages Only displayed when LON communica...

Page 78: ...edged service message can be displayed again by pressing for approx 3 seconds Press Service scan is terminated After carrying out maintenance reset coding 24 1 see page 120 to 24 0 If coding address 2...

Page 79: ...fault message or ascertain behaviour of system 2 Look for the corresponding cause of the fault in the diagnosis tables Please note Retrieve fault codes from the fault memory 3 Establish the action re...

Page 80: ...ety circuit potential free Ext fault Outdoor sensor Supply sensor Boiler sensor DHW tank temperature sensor 1 or 2 Sensor 17A Sensor 17B Room sensor Flue gas sensor Participant fault The meaning of th...

Page 81: ...e 86 48 Mixing valve is closed Open circuit Supply temperature sensor of mixing valve circuit M2 Check supply temperature sensor see page 86 4c Mixing valve is closed Open circuit Supply temperature s...

Page 82: ...fault codes are displayed Short circuit Collector temperature sensor S1 on the Vitosolic Check sensor on the solar control 93 Controlled operation Only the solar control fault codes are displayed Shor...

Page 83: ...electronics board b6 Operation at constant temperature Invalid hardware code Check the control software circuit board and confirm the coding address Enter coding 2 see page 125 for instructions Change...

Page 84: ...itional fixed high limit Check system pressure reset fixed high limit reset flue gas damper cd Controlled operation Communication fault Vitocom 300 Check connections and Vitocom 300 cEe Controlled ope...

Page 85: ...e page 112 df Controlled operation without influence of room temperature Open circuit Room temperature sensor mixing valve circuit M3 Check room temperature sensor see page 112 e0 Controlled operation...

Page 86: ...age 114 onwards for description Functions The boiler water temperature is measured via a multiple sensor well by three sensors separately Fixed high limit FHL liquid expansion Adjustable high limit AH...

Page 87: ...g system The heating curve determines the set point boiler water temperature value as a function of the outdoor temperature Control takes place on the basis of the mean outdoor temperature This is der...

Page 88: ...conjunction with mixing valve circuit The control behaviour of the mixing valve can be influenced via coding address C4 Frost protection A supply temperature of 15 to 22 C 59 to 72 F is assured for o...

Page 89: ...omatic re starting can take several hours Lower limit of control range Electronic minimum limit Setting range 1 to 127 C 34 to 261 F Change via coding address C5 Control sequence Mixing valve circuit...

Page 90: ...c hot water heating and the DHW circulation pump are effective for all heating circuits Individual switching times can be assigned to each heating circuit via the coding address 7F Frost protection fu...

Page 91: ...door temperature the heating curve slope and the setting of the coding address A2 DHW tank temperature rises Set point value 2 5 4 5 F The boiler water temperature set point value is reset to the weat...

Page 92: ...6 Boiler coding card 97 Fuses 97 TEST button 97 Fixed high limit 98 Adjustable high limit 98 Outdoor temperature sensor 99 Boiler temperature sensor and DHW tank temperature sensor 101 Strap on temper...

Page 93: ...t conditions During storage and transport 20 to 65 C 4 to 149 F Relay outputs at 120V for Heating circuit pumps or control output s 2 FLA 120 VAC 1 Circulation pump for heat ing the DHW tank sA 2 FLA...

Page 94: ...ctions and external equipment Plug in locations for electronics board LON communication module programming unit boiler coding card and Optolink board Power supply unit board Part No 7823 991 The power...

Page 95: ...Optolink laptop interface Emissions test switch Emissions test switch for flue gas measurements with the boiler operated with constant boiler water temperature for a short time The burner is switched...

Page 96: ...Fuses Heating system switch TEST button LON communication module Part No 7172 173 Accessory A Control unit or Vitocom 300 B Connecting cable for data transfer between the control units accessory C Ter...

Page 97: ...e CT3 1040 7820 144 Vitocrossal 200 Type CM2 1041 7820 145 Fuses F1 6 3 A 250 V for protecting the control elements pumps and electronics Mounting location see drawing Part No 7404 365 F2 6 3 A 250 V...

Page 98: ...has fallen approx 15 K below the shut down temperature Central fastening M 10 capillary 3600 mm long Tests Functional check via T V TEST button Adjustable high limit Part No 7817 531 The adjustable h...

Page 99: ...t cores from the sensor if actual values deviate severely from the curve repeat the sensor measurement and compare with the actual temperature 4 Depending on the result replace cable or outdoor temper...

Page 100: ...outdoor temperature sensor housing 1 Remove the cap 2 Mount the bottom part of the sensor housing 3 Pull the sensor wire through the opening in the terminal compartment and through the strain relief...

Page 101: ...ntly check installation and if necessary replace sensor Technical data Degree of protection IP 32 Ambient temperature During operation boiler temperature sensor 0 to 130 C 32 to 266 F DHW tank tempera...

Page 102: ...the plug Supply temperature in C F Resistance in 30 86 40 104 60 140 569 592 643 3 Compare the value measured with the current temperature If the value differs significantly check installation and if...

Page 103: ...2 of the plug Return temperature in C F Resistance in 30 86 40 104 60 140 569 592 643 3 Compare the value measured with the current temperature If the value differs significantly check installation an...

Page 104: ...e boiler control 2 Measure resistance of sensor at terminals 1 and 2 of the plug Flue gas temperature in C F Resistance in 180 176 160 320 200 392 650 800 880 3 Compare the value measured with the act...

Page 105: ...ical connections of the mixing valve motor are as required for the following installation examples do not change The electrical connections of the mixing valve motor must be changed for the following...

Page 106: ...ature Heating program Economy and party mode Function changes can be made via coding addresses A0 b0 to b9 C0 to C2 E1 and E2 see coding overview A Wall mounting base for Vitotrol 200 B To control uni...

Page 107: ...ting circuit selection button When connecting a separate room temperature sensor set DIP switch S6 3 to ON Specification Power supply via 145 KM BUS Safety class III Protection IP 30 Permiss ambient t...

Page 108: ...mperature Heating program Holiday program Switching times Economy and party mode Function changes can be made via coding addresses A0 b0 to b9 C0 to C2 E1 and E2 see coding overview A Wall mounting ba...

Page 109: ...hen connecting a separate room temperature sensor set DIP switch S30 3 to ON Specification Power supply via 145 KM BUS Safety class III Protection IP 30 Permiss ambient temperature In use 0 to 40 C 32...

Page 110: ...rol unit install a terminal box on site Version 1 A To control unit B Terminal box on site C Vitotrol 1 D Vitotrol 2 E Vitotrol 3 On site connection via terminal box Connect in accordance with the dia...

Page 111: ...Vitotrol 3 F Further BUS participants If several remote control units and additional KM BUS participants are connected make the connections via a terminal box on site as shown in the diagram The total...

Page 112: ...Two core cable max 35 m 115 ft long with a conductor cross section of 1 5 mm2 copper Set coding switch 3 on the rear of the top part of the remote control case to ON see page 107 Check room temperatur...

Page 113: ...nection aVF 0 to 10VDC input aVG KM BUS to control unit aBJ Potential free output contact A Power supply provide disconnect if required by code B DIP switch see table DIP switch Function 1 to 3 1 2 3...

Page 114: ...ing Address Value Possible change System type 00 1 System circuit A1 without domestic hot water heating 00 12 System circuit A1 with domestic hot water heating without domestic hot water heating 00 13...

Page 115: ...perating time variable from 5 to 199 seconds Participant number 77 1 LON participant number 77 1 to 77 99 LON participant number selectable from 1 to 99 Please note Each number may be assigned once on...

Page 116: ...valve circuits M2 and M3 1 Press w and rw simultaneously for approx 2 seconds press to confirm Access coding level 2 2 Call up the required coding address with the or button press to confirm 3 Change...

Page 117: ...ing valve circuit M2 with domestic hot water heating 00 15 System circuit A1 and mixing valve circuit M2 without domestic hot water heating 00 16 System circuit A1 and mixing valve circuit M2 with dom...

Page 118: ...ing differential i e the burner operating time is varied in relation to the actual heat demand Burner Burner Burner Set point Set point Set point Low heat demand Medium heat demand High heat demand Ti...

Page 119: ...rm Control effective for mixing valve of heating circuits 0d 2 Without function 13 1 Boiler burner Switch off differential The burner is switched off 13 0 Without switch off differential burner The bu...

Page 120: ...y appears address is set automatically and must be reset manually after maintenance has been carried out 26 0 Boiler burner 2 stage Fuel consumption of burner 1st stage not metered if 26 0 and 27 0 ar...

Page 121: ...F 60 Run on time adjustable from 1 to 60 minutes 54 0 General Without solar control 54 1 With Vitosolic 100 automatically recognized 54 2 With Vitosolic 200 automatically recognized 55 0 DHW DHW tank...

Page 122: ...on pump with 62 0 Circulation pump without run on time p p run on time of 10 minutes 62 1 to 62 15 Run on time variable from 1 to 15 minutes 64 2 DHW During the party mode Continuous domestic hot 64 0...

Page 123: ...nt only on preset time program 71 0 DHW DHW circulation pump ON according to preset time 71 1 DHW circulation pump OFF during domestic hot water heating to the 1st set point value g p program 71 2 DHW...

Page 124: ...ut time delay y for fault message 80 2 to 80 199 Time delay adjustable between 10 and 995 seconds 1 increment 5 seconds 81 1 General Automatic resetting to summer winter time 81 0 Manual resetting to...

Page 125: ...onstant for calculating the outdoor temperature change 21 3 hours 90 0 to 90 199 Fast matching lower values or slow matching higher values of the supply temperature to the change in the outdoor temper...

Page 126: ...active 99 3 Without function 99 4 Close mixing valve mixing valve circuit M3 99 5 Without function 99 6 Close mixing valve mixing valve circuits M2 and M3 99 7 Without function 99 8 External disable...

Page 127: ...alve mixing valve circuit g pump and mixing valve A2 1 1 The mixing valve is closed and the heating circuit pump is ON when the DHW tank is being heated A2 3 1 to A2 15 Reduced DHW tank priority over...

Page 128: ...and heating circuit pump are switched off and the mixing valve is closed A7 0 Mixing valve circuit Without mixing valve energy saving function A7 1 With mixing valve energy saving function extended h...

Page 129: ...er circuit In conjunction with remote control and for the heating b2 0 Without room influence circuit mixing valve circuit control and for the heating circuit operation with room temperature control m...

Page 130: ...on with the room temperature sensor switched on or with pure room temperature dependent control The desired room temperature value must be increased by at least 2 K by Pressing the party button Switch...

Page 131: ...Mixing valve circuit with 4 way mixing valve C4 0 Mixing valve circuit with 3 way mixing valve circuit y g C4 2 Special case 1 C4 3 Special case 2 C5 20 Boiler circuit mixing valve circuit Electronic...

Page 132: ...Max supply temperature reached Operating status and outdoor temperature on handing over the installation Slab curing function selectable on basis of four temperature time curves see page 134 Please n...

Page 133: ...oding address A3 F9 10 to F9 60 Temperature limit adjustable from 10 to 60 C FA 20 Boiler circuit mixing valve circuit Raising of the supply temperature when switching reduced to normal room temperatu...

Page 134: ...tinued Slab curing function diagrams Temperature time curve 1 F1 1 Supply temperature C Days Temperature time curve 2 F1 2 Supply temperature C Days Temperature time curve 3 F1 3 Supply temperature C...

Page 135: ...voltage motherboard A3 120 V motherboard A4 Electronics board for mixing valve extension A6 Programming unit A7 Optolink emissions test switch board A8 Electronics board A9 Boiler coding card A10 LON...

Page 136: ...Additional information 136 Wiring diagram continued Low voltage motherboard 5285 941 01 A11 A8 A9 A6 A2 A10 A 5 A 7 34 pole...

Page 137: ...ank loading system accessory aG Flue gas temperature sensor accessory aJA Temperature sensor of Therm Control or temperature sensor T1 aJB Temperature sensor T2 aVD Connection of external equipment aV...

Page 138: ...Additional information 138 Wiring diagram continued 120 V motherboard 5285 941 01 A11 A3 float ing ON ON...

Page 139: ...r installed on site gS Mixing valve motor for return temperature control or 3 way mixing valve for DHW tank loading system l Burner 2nd stage modulating aB External equipment a External safety equipme...

Page 140: ...Additional information 140 Wiring diagram Mixing valve extension circuit board Supply temperature sensors s Heating circuit pumps gS Mixing valve motors K1 K6 Relays 5285 941 01 A4 A1...

Page 141: ...cable 14 pole 024 Fuse holder cover 025 Fuse holder 030 Fixed high limit 3510mm 031 Adjustable high limit 037 Switch 1 pole FHL test 038 Switch 2 pole power on off 040 Sensor 1 for outdoor temperature...

Page 142: ...for Vitorond 200 063 Coding plug for Vitocrossal 300 080 Installation Service Instructions 081 Operating Instructions 082 Parts List Rating plate 1 A 16 digit bar coded serial no is printed on the fr...

Page 143: ...143 5285 941 01...

Page 144: ...144 5285 941 01...

Page 145: ...145 5285 941 01...

Page 146: ...732 0590 www viessmann us com info viessmann us com 146 Quick Reference C F 40 40 35 31 25 13 20 4 18 0 16 3 14 7 12 10 10 14 9 16 8 18 7 19 6 21 5 23 4 25 3 27 2 28 1 30 0 32 1 34 2 36 3 37 4 39 5 41...

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Viessmann VITOTRONIC 300 GW2, Installation And Service Instructions Manual

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