Viessmann Vitotronic 300-K Installation And Service Instructions Manual
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Viessmann Vitotronic 300-K Installation And Service Instructions Manual

Digital boiler control unit/weather-compensated digital cascade control unit
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Installation and Service
Instructions
for use by heating contractor
Vitotronic 100, Type GC1B
Digital boiler control unit
For use with Boiler models VD2A, VD2 and CT3
Vitotronic 300-K, Type MW1B
Weather-compensated digital cascade control unit
VITOTRONIC
VITOTRONIC
Certified as a component
part for Viessmann boilers
5793 309 - 05
09/2016
100
r
300-K
r
Vitotronic 100
Vitotronic 300-K
Product may not be exactly as shown
IMPORTANT
Read and save these instructions
for future reference.
Please file in Service Binder

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Summary of Contents for Viessmann Vitotronic 300-K

  • Page 1 Installation and Service Instructions for use by heating contractor Vitotronic 100, Type GC1B Digital boiler control unit For use with Boiler models VD2A, VD2 and CT3 Vitotronic 300-K, Type MW1B Weather-compensated digital cascade control unit VITOTRONIC VITOTRONIC 300-K Vitotronic 100...

  • Page 2: General

    General Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Safety, Installation and Warranty Requirements Please ensure that these instructions are read and understood before commencing installation. Failure to comply with the instructions listed below and details printed in this manual can cause product/property damage, severe personal injury, and/or loss of life.

  • Page 3: Table Of Contents

    Table of Contents Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Page General Safety, Installation and Warranty Requirements....2 Product Information............2 Safety For your Safety............6 About these Instructions..........7 Installation Examples Overview of System Examples........8 System Example 1.............9 Multi boiler system: Boiler with Therm-Control..9 Equipment required..........10...
  • Page 4 Table of Contents Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Page Vitotronic 100, Installation Adjusting the Fixed High Limit (if required)....56 Changing the Adjustable High Limit (if required).....57 Connecting Sensors...........57 Power Supply............58 External Connections..........59 Connecting Actuators..........60 Connecting the Central Fault Message Facility....61 Connection of Low Water Cut-off Device ....61...
  • Page 5 Table of Contents Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Page Service Scans, Vitotronic 300-K Calling up Service Menu..........97 Scanning Operating Data...........97 Brief Scan...............98 Scanning and Resetting Service Display.......98 Troubleshooting, Vitotronic 100 Fault Display............99 Fault Codes............100 Troubleshooting, Vitotronic 300-K Fault Display............103...

  • Page 6: Safety

    Safety Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service For your Safety If you smell gas CAUTION H Don’t smoke! Don’t use naked flames or cause sparks (e.g. by switching lights or electrical appliances on Follow these safety instructions closely to avoid the risk and off) of injury and damage to property.

  • Page 7: About These Instructions

    Safety Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service About these Instructions Take note of all symbols and notations intended to draw attention to potential hazards or important product information. These include “WARNING”, “CAUTION”, and “IMPORTANT”. See below.

  • Page 8: Installation Examples

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Overview of System Examples Designations in the System Example Boiler Characteristics Page Vitorond Therm-Control Vitorond Shunt pump for every boiler for return temperature raising Vitorond Boiler circuit pump and 3-way mixing valve for raising the return temperature 25...

  • Page 9: System Example 1

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 1 Multi boiler system: Boiler with Therm-Control Note: This scheme is a basic example without shut-off devices or safety equipment. This does not replace the need for local engineering.

  • Page 10: Equipment Required

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 1 (continued) Equipment required Pos. Description Boiler I Therm-Control temperature sensor Boiler water temperature sensor KTS Motorized isolation valve Supply temperature sensor, common heating flow VTS as...
  • Page 11 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 1 (continued) Equipment required Pos. Description Supply temperature sensor M3 as - contact temperature sensor - immersion temperature sensor Mixing valve motor for flanged mixing valve M3...
  • Page 12 External hook-ups - External blocking/mixing valve closed - External demand - External heating program changeover/mixing valve open LON communication module (standard delivery Vitotronic 300-K) for communication with the following components: Vitotronic boiler and heating circuit control units Vitocom 100 LAN 1...

  • Page 13: Electrical Installation Scheme

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 1 (continued) Electrical installation scheme...
  • Page 14 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 1 (continued)
  • Page 15 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 1 (continued)

  • Page 16: Code Required At Every Vitotronic 100

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 1 (continued) Code required at every Vitotronic 100 Group Function 01:2 2 “Boiler” Multi boiler system with cascade control via LON Boiler number at the Vitotronic: 07:2 2 “Boiler”...

  • Page 17: System Example 2

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 2 Multi boiler system: Boilers with shunt pump for every boiler for return temperature raising Note: This scheme is a basic example without shut-off devices or safety equipment. This does not replace...

  • Page 18: Equipment Required

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 2 (continued) Equipment required Pos. Description Boiler I Boiler water temperature sensor KTS Vitotronic 100 Vitotronic 300-K Outside temperature sensor ATS Supply temperature sensor, common heating flow VTS as...
  • Page 19 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 2 (continued) Equipment required Pos. Description Supply temperature sensor M2 as contact temperature sensor Mixing valve motor M2 Supply temperature sensor M2 as - contact temperature sensor...
  • Page 20 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 2 (continued) Equipment required Pos. Description Outside temperature sensor ATS Boiler accessories Connection to safety equipment aBÖ (see page 61) Minimum pressure limiter SDB Maximum pressure limiter SDB...

  • Page 21: Electrical Installation Scheme

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 2 (continued) Electrical installation scheme...
  • Page 22 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 2 (continued)
  • Page 23 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 2 (continued)

  • Page 24: Code Required At Every Vitotronic 100

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 2 (continued) Code required at every Vitotronic 100 Group Function 01:2 2 “Boiler” Multi boiler system with cascade control via LON Boiler number at the Vitotronic: 07:2 2 “Boiler”...

  • Page 25: System Example 3

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 3 (continued) Multi boiler system: Boilers with boiler circuit pump and 3-way mixing valve for return temperature raising Note: This scheme is a basic example without shut-off devices or safety equipment.

  • Page 26: Equipment Required

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 3 (continued) Equipment required Pos. Description Boiler I Boiler water temperature sensor KTS Vitotronic 100 Vitotronic 300-K Outside temperature sensor ATS Supply temperature sensor, common heating flow VTS as...
  • Page 27 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 3 (continued) Equipment required Pos. Description Mixing valve motor M2 for flanged mixing valve M2 Heating circuit 3 Heating circuit pump M3 Extension kit for one heating circuit with mixing valve M3:...
  • Page 28 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 3 (continued) Equipment required Pos. Description - External boiler blocking - Start boiler externally as the last one in the boiler sequence System accessories ON/OFF switch...

  • Page 29: Electrical Installation Scheme

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 3 (continued) Electrical installation scheme...
  • Page 30 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 3 (continued)
  • Page 31 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 3 (continued)

  • Page 32: Code Required At Every Vitotronic 100

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 3 (continued) Code required at every Vitotronic 100 Group Function 01:2 2 “Boiler” Multi boiler system with cascade control via LON Boiler number at the Vitotronic: 07:2 2 “Boiler”...

  • Page 33: System Example 4

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 4 (continued) Multi boiler system: Vitocrossal and low temperature boilers with Therm-Control, with several heating circuits and one low temperature heating circuit Note: This scheme is a basic example without shut-off devices or safety equipment.

  • Page 34: Equipment Required

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 4 (continued) Equipment required Pos. Description Boiler I Boiler water temperature sensor KTS Supply temperature sensor, common heating flow VTS as - contact temperature sensor (standard delivery for Vitotronic 300-K)
  • Page 35 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 4 (continued) Equipment required Pos. Description Supply temperature sensor M3 as - contact temperature sensor - immersion temperature sensor Mixing valve motor for flanged mixing valve M3...
  • Page 36 - Short term operation of DHW recirculation pump External hook-ups - External blocking/mixing valve closed - External demand - External heating program changeover/mixing valve open LON communication module (standard delivery Vitotronic 300-K) for communication with the following components: Vitotronic boiler and heating circuit control units...

  • Page 37: Electrical Installation Scheme

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 4 (continued) Electrical installation scheme...
  • Page 38 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 4 (continued)
  • Page 39 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 4 (continued)

  • Page 40: Code Required At Every Vitotronic 100

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 4 (continued) Code required at every Vitotronic 100 Group Function 01:2 2 “Boiler” Multi boiler system with cascade control via LON 07:2 Boiler number at the Vitotronic: 2 “Boiler”...

  • Page 41: System Example 5

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 5 Multi boiler system: Vitocrossal and low temperature boilers with 3-way mixing valve, with several heating circuits and one low temperature heating circuit Note: This scheme is a basic example without shut-off devices or safety equipment.

  • Page 42: Equipment Required

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 5 (continued) Equipment required Pos. Description Boiler I Boiler water temperature sensor KTS Supply temperature sensor, common heating flow VTS as - contact temperature sensor (standard delivery for Vitotronic 300-K)
  • Page 43 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 5 (continued) Pos. Description Supply temperature sensor M3 as contact temperature sensor Mixing valve motor M3 Supply temperature sensor M3 as - contact temperature sensor - immersion temperature sensor...
  • Page 44 - Short term operation of DHW recirculation pump External hook-ups - External blocking/mixing valve closed - External demand - External heating program changeover/mixing valve open LON communication module (standard delivery Vitotronic 300-K) for communication with the following components: Vitotronic boiler and heating circuit control units...

  • Page 45: Electrical Installation Scheme

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 5 (continued) Electrical installation scheme...
  • Page 46 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 5 (continued)
  • Page 47 Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 5 (continued)

  • Page 48: Code Required At Every Vitotronic 100

    Installation Examples Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service System Example 5 (continued) Code required at every Vitotronic 100 Group Function 01:2 Multi boiler system with cascade control via LON Boiler number at the Vitotronic 07:2 2 “Boiler”...

  • Page 49: Control Unit Installation

    Control Unit Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Mounting the Control Unit 1. Fasten the metal back plate to the mounting surface with four fasteners. 2. Install the junction box to the back plate. 3. Fasten the junction box to the back plate with two fasteners.

  • Page 50: Fitting The Control Unit Front

    Control Unit Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fitting the Control Unit Front 1. Snap on the control cover to the control housing. 2. Snap on the interface cover to the control cover. 3. Release the stay bar and lock in position.

  • Page 51: Opening The Control Unit

    Control Unit Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Opening the Control Unit 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.

  • Page 52: Vitotronic 100, Installation

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Overview of Electrical Connections Note: When connecting plugs aVD and aVH, bundle the individual cores of the cables close to the terminals. This prevents the cores from shifting into the neighboring voltage area.
  • Page 53 Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Overview of Electrical Connections (continued) Legend A Vitotronic 100 B Junction box C Burner motor power supply (refer to page 69) fÖ Vitotronic 100 GC1B power supply...

  • Page 54: Pump Connection Overview

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Pump Connection Overview Legend Pumps 120V A 120V pump output Available pump connections B To the Vitotronic control unit sÖM1/A1 Switching contact/shunt pump C Junction box Boiler pump...

  • Page 55: Inserting Cables And Applying Strain Relief

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Inserting Cables and Applying Strain Relief H Control unit fitted on the boiler: Route cables from below through the front panel of the boiler into the wiring chamber of the control unit.

  • Page 56: Inserting The Lon Communication Module

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Inserting the LON Communication Module Making the LON connection, see page 83. Legend A LON communication module (accessory) B Vitotronic 100 GC1B Adjusting the Fixed High Limit...

  • Page 57: Changing The Adjustable High Limit (If Required)

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Changing the Adjustable High Limit (if required) Note: Excessive DHW temperatures can damage the DHW tank. If the system is operated in conjunction with a DHW tank, ensure that the maximum permissible water temperature is not exceeded.

  • Page 58: Power Supply

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Power Supply Legend L: Line N: Neutral G: Ground 1. Ensure that the main power supply to the control contains overcurrent protection with a minimum A Power supply 120VAC, 1PH, 60Hz, provide rating of 12A and 2-pole disconnect.

  • Page 59: External Connections

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service External Connections 120V pumps with an amperage draw of <2FLA Legend A Din rail B Pump 120V pumps with an amperage draw of >2FLA Contactor specification 120VAC 1A...

  • Page 60: Connecting Actuators

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting Actuators Legend Legend A 24V Mixing Valve Adaptor A 120V Mixing Valve Adaptor B DIN Rail (in junction box) B DIN Rail (in connection enclosure) C 24V Valve Actuator...

  • Page 61: Connecting The Central Fault Message Facility

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting the Central Fault Message Facility Rated voltage 120V~ Rated current max. 2A~ Connection of Low Water Cut-off Device 1. Remove jumper between terminals 12 and 15.

  • Page 62: External Burner Blocking

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service External Burner Blocking Note: ‘Live’ contacts lead to short circuits or phase failure. The external connection must be floating. Remove jumper from DIN terminals 16 and 17.

  • Page 63: Vitotronic 100, Gc1 With 30% Ltp Package (Vd2 Only)

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Vitotronic 100, GC1 with 30% LTP Package (VD2 only) 30% LTP Package consists of: Each pump output: 120V single phase - 1 circulation pump Max. pump current: 2 FLA...

  • Page 64: External Changeover Of Multi Stage/Modulating Burners

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service External Changeover of Multi Stage/Modulating Burners Connection at plug aVH. Note: ‘Live’ contacts lead to short circuits or phase failure. The external connection must be floating. Contact open:...

  • Page 65: Connection Of Combustion Air Device

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection of Combustion Air Device Legend Connection of the Combustion Air Device Adaptor A Combustion Air Device Adaptor 1. Disconnect power to control and burners. B DIN Rail in connection enclosure 2.

  • Page 66: Connection Of Combustion Air Device On Multiple Boiler Systems

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection of Combustion Air Device on Multiple Boiler Systems If a single combustion air device is required for a multiple boiler system, a Common Combustion Air Interface must be installed.

  • Page 67: Burner Connection, Burner Control Wiring

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Burner Connection, Burner Control Wiring For burners with plug-in connection The burner cables are included in the standard delivery of the Vitotronic. Connect the burner in accordance with applicable codes.
  • Page 68 Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Burner Connection, Burner Control Wiring (continued) For burner without plug-in connection CAUTION The burner cables are included in the standard delivery of the Vitotronic. Connect the burner in accordance with This is a generic connection drawing only! applicable codes.

  • Page 69: Burner Connection, Motor Power Supply

    Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Burner Connection, Motor Power Supply CAUTION The control must be grounded. Ensure that “L”, “N” and “G” are not interchanged. 1. Ensure that the main power supply to the control contains overcurrent protection with a maximum rating of 15A and 2 pole disconnect.
  • Page 70 Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Burner Connection, Motor Power Supply Burner 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 controls.
  • Page 71 Vitotronic 100, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Burner Connection, Motor Power Supply (continued) Burner motor power supply connection (continued) For burners with 3PH 208, 460 or 575V power supply. CAUTION During commissioning check for correct motor rotation. If...

  • Page 72: Vitotronic 300-K, Installation

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Overview of Electrical Connections Note: When connecting plugs aVD and aVH, bundle the individual wires of the cables close to the terminals. This ensures that, should there be an error, for example when detaching a wire, the wires cannot drift into the adjacent voltage area.
  • Page 73 Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Overview of Electrical Connections (continued) Legend A Vitotronic 300-K B Junction box fÖ Vitotronic 300-K power supply connection...

  • Page 74: Inserting Cables/Leads And Applying Strain Relief

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Inserting Cables/Leads and Applying Strain Relief Run the cables from the connection enclosure into the control unit. Apply strain relief to cables. Cables with moulded strain relief clamp: Connect cable and strain relief clamp.

  • Page 75: Connecting Pumps

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting Pumps Pumps 120V Legend Available pump connections A 120V Pump outputs sÖA1/M1 High temperature circuit pump B To the Vitotronic control unit Heating circuit M2 pump sÖM2...

  • Page 76: Connecting Sensors

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting Sensors Installation point for outside temperature sensor H North or north-western wall, 6.6 to 8.2 ft. (2 to 2.5 m) above ground level; in multi storey buildings, in the...

  • Page 77: Power Supply

    Power Supply Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Power Supply Legend L: Line N: Neutral G: Ground 1. Ensure that the main power supply to the control contains overcurrent protection with a minimum A Power supply 120VAC, 1PH, 60Hz, 12FLA rating of 12A and 2-pole disconnect.

  • Page 78: External Connections

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service External Connections 120V pumps with an amperage draw of <2FLA Legend A Din rail B Pump 120V pumps with an amperage draw of >2FLA Contactor specification 120VAC 1A...

  • Page 79: Connecting Actuators

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting Actuators Legend Legend A 24V Mixing Valve Adaptor A 120V Mixing Valve Adaptor B DIN Rail (in junction box) B DIN Rail (in junction box) C 24V Valve Actuator...

  • Page 80: Connecting The Central Fault Message Facility

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting the Central Fault Message Facility Rated voltage 120V~ Rated current max. 2A~ External Demand Via Switching Contact Connection Note: ‘Live’ contacts lead to short circuits or phase failure.

  • Page 81: External Demand Via 0-10V Input

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service External Demand via 0–10V Input Connection at input 0 – 10V at extension EA1 (see page 160). 0 - 1V no default set supply temperature set value 50°F (10°C) set value 212°F (100°C)

  • Page 82: External "Mixing Valve Closed"/"Mixing Valve Open

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service External “Mixing Valve Closed”/”Mixing Valve Open” Connection at plug aVD. Note: ‘Live’ contacts lead to short circuits or phase failure. The external connection must be floating. Codes External “Mixing valve...

  • Page 83: Making The Lon Connection

    Vitotronic 300-K, Installation Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Making the LON Connection The Viessmann LON system is designed for the Connection with Viessmann LON cable “Line” BUS topology with a terminator at both ends (accessories). The transfer distances for LON are subject to the electrical properties of the respective cabling.

  • Page 84: Commissioning

    Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Testing the Fixed High Limit -Vitotronic 100 The minimum circulation volume should be 10% of the circulation volume at rated load. Reduce the heat consumption as far as possible.

  • Page 85: Matching The Coding Addresses To The System Version

    Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Matching the Coding Addresses to the System Version Vitotronic 100 Check all addresses in Code 1 and adjust if required. Check the following coding address and adjust accordingly in Code 2:...

  • Page 86: Selecting The Boiler Sequence At The Vitotronic 300-K

    Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Matching the Coding Addresses to the System Version (continued) Vitotronic 300-K Check all addresses in Code 1 and adjust if required. Check the following coding addresses and adjust accordingly in Code 2:...

  • Page 87: Connecting The Control Unit To The Lon

    Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting the Control Unit to the LON Example of a multi boiler system Legend H The LON communication module must be fitted into A Vitotronic 100 B Vitotronic 100 every Vitotronic 100 (see page 56).
  • Page 88 Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting the Control Unit to the LON (continued) Multi boiler system. Multi boiler system. Set code “01:2” in Set code “01:2” in group 2 “Boiler”. group 2 “Boiler”. Boiler number 1.
  • Page 89 Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connecting the Control Unit to the LON (continued) Carrying out a LON participant check at the Vitotronic 300-K Communication with the system devices connected to the fault manager is tested by means of a participant check.

  • Page 90: Checking Actuator And Sensors At The Vitotronic 100

    Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Checking Actuators and Sensors at the Vitotronic 100 Carrying out a relay test 1. Press OK and simultaneously for approx. 4 sec. flashes on the display. 2. With select “...

  • Page 91: Commissioning

    Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Checking Actuators and Sensors at the Vitotronic 300-K Carrying out a relay test 1. Press OK and simultaneously for approx. 4 sec. 2. “Actuator test” The following relay outputs can be controlled subject to the system equipment level:...

  • Page 92: Adjusting Heating Curves

    Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Adjusting Heating Curves The heating curves illustrate the relationship between the outside temperature and the boiler water or supply temperature. To put it simply: The lower the outside temperature, the higher the boiler water or supply temperature.
  • Page 93 Commissioning Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Adjusting Heating Curves (continued) Reduced set room temperature Changing the reduced room temperature from 37 to 57°F (3 to 14°C) Refer to the Operating Instructions Legend A Boiler water temperature or supply temperature...

  • Page 94: Calling Up Service Level

    Service Scans, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Calling up Service Level 1. Press OK and simultaneously for approx. 4 sec. flashes on the display. 2. Select required function, e.g. relay test. Exiting the Service Level 1.

  • Page 95: Brief Scan

    Service Scans, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Brief Scan 1. Press OK and simultaneously for approx. 4 sec. flashes on the display. 2. Confirm with OK. 3. Select required scan. For example, “b” for “Boiler coding card”...

  • Page 96: Scanning And Resetting Service Display

    Service Scans, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Scanning and Resetting Service Display After the limits set at coding address “1F”, “21”, “23” in group 2 “Boiler” have been reached, the red fault indicator begins to flash and the display shows:...

  • Page 97: Calling Up Service Menu

    Service Scans, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Calling up the Service Menu Service menu overview Press OK and simultaneously for approx. 4 sec. Service General Diagnosis Heating circuit 1 HC1 Heating circuit 2 HC2...

  • Page 98: Brief Scan

    Note: The displays in fields 3 and 5 are the same. Scanning and Resetting Service Display No service interval can be set at the Vitotronic 300-K. In other words, no service display is shown. Note: If a service display appears on the Vitotronic 300-K, MW1B, the display will show “Participant fault”...

  • Page 99: Fault Display

    Troubleshooting, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Display In the event of a fault, the red fault display flashes at the Note: A fault message facility, if connected, will be  control unit. The 2- digit fault code and flash on the switched off.

  • Page 100: Service Scans, Vitotronic

    Troubleshooting, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Codes Displayed fault System characteristics Cause Measures code Control mode. Service “0F” is only Service the appliance. displayed in the fault Note: After the service, set history.
  • Page 101 Troubleshooting, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Codes (continued) Displayed fault System characteristics Cause Measures code Boiler cools down. Fault, safety equipment at “X1” of Check safety equipment, and reset plug-in adaptor 2 for external safety if required.
  • Page 102 Troubleshooting, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Codes (continued) Displayed fault System characteristics Cause Measures code Control mode. Incorrect LON communication Replace LON communication No communication via module module. LON. Boiler cools down.

  • Page 103: Fault Display

    Troubleshooting, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Display In the event of a fault, the red fault display flashes at the  control unit. “Fault” is displayed and flashes. The fault code is displayed with OK.

  • Page 104: Fault Codes

    Troubleshooting, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Codes Displayed System characteristics Cause Measures fault code Activates at 32°F (0°C) outside Short circuit, outside temperature Check outside temperature temperature. sensor sensor (see page 158).
  • Page 105 Troubleshooting, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Codes (continued) Displayed System characteristics Cause Measures fault code Boiler with maximum Short circuit, temperature sensor Check temperature sensor temperature, no output (see page 158). reduction, mixing valve return temperature control “Open”.
  • Page 106 Troubleshooting, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Codes (continued) Displayed System characteristics Cause Measures fault code Control mode. Lead break, temperature sensor, Check sensor at the solar control unit connection at S3 of the Vitosolic (see separate installation and service instructions).
  • Page 107 Troubleshooting, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Fault Codes (continued) Displayed System Cause Measures fault code characteristics Control mode. Lead break, KM Check KM BUS cable and appliance. BUS to solar control module or...

  • Page 108: Boiler Temperature Control-Vitotronic 100

    Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Boiler Temperature Control of the Vitotronic 100 Brief description H The boiler water temperature is regulated by starting and stopping the burner or through modulation. H The set boiler water temperature is specified by the Vitotronic 300-K cascade control unit.

  • Page 109: Boiler Temperature Control-Vitotronic 300-K

    Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Boiler Temperature Control of the Vitotronic 300-K Switching hysteresis, burner Permanent switching hysteresis Code “04:0” Time Heat demand-dependent switching hysteresis The heat demand-dependent switching hysteresis takes the boiler load into account.

  • Page 110: Cascade Control Of The Vitotronic 300-K

    Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Cascade Control of the Vitotronic 300-K Cascading Layouts Brief description Boilers connected in parallel The supply temperature is regulated by starting or stopping the burners or by starting/stopping individual H Without and with supply temperature sensor.
  • Page 111 Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Cascade Control of the Vitotronic 300-K (continued) Conventional strategy 1 Control strategies (code “3C:1” in the “Cascade” group) Condensing strategy (code “3C:0” in the “Cascade” group) Benefit: As few boilers as possible are active.
  • Page 112 Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Cascade Control of the Vitotronic 300-K (continued) Conventional strategy 2 (code “3C:2” in the “Cascade” group) Benefit: Long burner runtimes. Code “3C:2” in the “Cascade” group (factory set condition).

  • Page 113: Heating Circuit Control Unit Of The Vitotronic 300-K

    Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Heating Circuit Control Unit of the Vitotronic 300-K Brief description Outside temperature A heating curve must be set for matching the control unit H The control unit has control circuits for one system to the building and the heating system.
  • Page 114 Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Heating Circuit Control Unit of the Vitotronic 300-K (continued) DHW temperature System dynamics Priority control You can influence the control characteristics of the mixing valves via coding address “C4” in the “Heating circuit...”...
  • Page 115 Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Heating Circuit Control Unit of the Vitotronic 300-K (continued) Supply temperature control Differential temperature: The differential temperature is adjustable via coding address “9F” in the “General” group, factory set condition 8 K.
  • Page 116 Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Heating Circuit Control Unit of the Vitotronic 300-K (continued) Example using the settings in the factory set condition Control sequence Mixing valve circuit The mixing valve motor will not be controlled within the “neutral zone”...

  • Page 117: Dhw Tank Temperature Control Of The Vitotronic 300-K

    Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service DHW Tank Temperature Control of the Vitotronic 300-K Brief description Frost protection The DHW tank will be heated to 68°F (20°C) if the H The DHW tank temperature control is a constant DHW temperature sinks below 41°F (5°C).
  • Page 118 Function Description Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service DHW Tank Temperature Control of the Vitotronic 300-K (continued) Control sequence Code “55:2” in the “DHW” group, DHW tank temperature control with 2 DHW tank temperature sensors Code “55:0” in the “DHW” group, DHW tank heating DHW tank temperature sensor 1 enables the circulation The DHW tank goes cold (set value −2.5 K, adjustable...

  • Page 119: Calling Up Coding Level 1

    Coding 1, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Calling up Coding Level 1 Note: Codes that have no function due to the heating 1. Press OK and simultaneously for approx. 4 sec. system equipment level or the setting of other flashes on the display.

  • Page 120: Group 1 "General

    Coding 1, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Group 1 “General” Coding Coding in the factory set condition Possible change System design 00:1 No Function. 00:0 Set automatically if code “01:2” is set. Boiler control unit is linked into the cascade.
  • Page 121 Coding 1, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Group 2 “Boiler” (continued) Coding in the factory set condition Possible change Boiler water temperature maximum limit 06:87 Set to 189°F (87°C). 06:20 Adjustable from 68 to 261°F (20 to 127°C).

  • Page 122: Calling Up Coding Level 2

    Coding 2, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Calling up Coding Level 2 Note: H In coding level 2, all codes are accessible, 1. Press OK and simultaneously for approx. 4 sec. including the codes from coding level 1.

  • Page 123: Group 1 "General

    Coding 2, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Group 1 “General” Coding Coding in the factory set condition Possible change 00:1 No Function 00:0 Set automatically if code “01:2” is set. Boiler control unit is linked into the cascade.
  • Page 124 Coding 2, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Group 1 “General” (continued) Coding in the factory set condition Possible change 6C:0 No run-on time neutralizing system. 6C:1 Run-on time neutralizing system at output A1 at extension AM1, adjustable 6C:255 from 1 to 255 sec.

  • Page 125: Group 2 "Boiler

    Coding 2, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Group 2 “Boiler” Coding Coding in the factory set condition Possible change 01:1 Single boiler system. 01:2 Multi boiler system with cascade control via LON. 01:3 Do Not Adjust.
  • Page 126 Coding 2, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Group 2 “Boiler” (continued) Coding in the factory set condition Possible change 0C:5 Modulating isolation valve, independent of 0C:0 No Function. the set boiler water temperature.
  • Page 127 Coding 2, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Group 2 “Boiler” (continued) Coding in the factory set condition Possible change 1F:0 With flue gas temperature sensor: 1F:1 When the flue gas temperature limit is...

  • Page 128: Calling Up Coding Level 1

    Coding 1, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Calling up Coding Level 1 Note: H The codes are displayed as plain text. H Codes that have no function due to the heating system equipment level or the setting of other codes are not displayed.

  • Page 129: General" Group

    Coding 1, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “General” Group Coding Coding in the factory set condition Possible change System design 00:1 One system circuit A1 (heating circuit 1), 00:2 For system schemes, see the following without DHW heating table.

  • Page 130: Cascade" Group

    Coding 1, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Cascade” Group Coding Coding in the factory set condition Possible change Number of boilers in cascade 35:4 4 boilers connected to the Vitotronic 35:1 1 to 4 boilers connected to the 300-K.

  • Page 131: Solar" Group

    Coding 1, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Solar” Group Only in conjunction with solar control module, type SM1. Coding Coding in the factory set condition Possible change Speed control solar circuit pump 02:0...

  • Page 132: Heating Circuit 1", "Heating Circuit 2", "Heating Circuit 3" Group

    Coding 1, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Heating Circuit 1”, “Heating Circuit 2”, “Heating Circuit 3” Group Coding Coding in the factory set condition Possible change Priority DHW heating A2:2 DHW tank priority applicable to heating circuit...
  • Page 133 Coding 1, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Heating Circuit 1”, “Heating Circuit 2”, “Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change Extended economy function mixing valve Weather-compensated/room temperature hook-up...
  • Page 134 Coding 1, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Heating Circuit 1”, “Heating Circuit 2”, “Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change Slab curing function (Not Used) F1:0 Do not adjust.

  • Page 135: Calling Up Coding Level 2

    Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Calling up Coding Level 2 Note: H In coding level 2, all codes are accessible, including the codes from coding level 1. H Codes that have No function due to the heating system equipment level or the setting of other codes are not displayed.

  • Page 136: General" Group

    Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “General” Group Coding Coding in the factory set condition Possible change 00:1 One system circuit A1 (heating circuit 1), 00:2 For system schemes, see the following table.
  • Page 137 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “General” Group (continued) Coding in the factory set condition Possible change 4D:1 4D:0 Distribution pump. Connection at plug sL: Shunt pump. 4E:1 4E:2 Motor for 3-way mixing valve, primary store Connection at plug gSA1: system.
  • Page 138 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “General” Group (continued) Coding in the factory set condition Possible change 5F:0 Function input DE3 at extension EA1: 5F:1 Heating program changeover. No Function. 5F:2 External demand with minimum set supply temperature.
  • Page 139 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “General” Group (continued) Coding in the factory set condition Possible change 84:7 Summer time starts: 84:1 Monday to Sunday Last Sunday of the selected month. 84:7...
  • Page 140 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “General” Group (continued) Coding in the factory set condition Possible change 99:0 99:1 No Function. Connection at terminals 2 and 3 in plug aVD 99:2 External “Mixing valve closed”...

  • Page 141: Cascade" Group

    Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Cascade” Group Coding Coding in the factory set condition Possible change 35:4 4 boilers connected to the Vitotronic 300-K. 35:1 1 to 4 boilers connected to the Vitotronic 300-K.

  • Page 142: Dhw" Group

    Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Cascade” Group (continued) Coding in the factory set condition Possible change 43:31 No ECO threshold boiler 3. 43:−30 ECO threshold boiler 3 adjustable from -22 to +86°F (−30 to +30°C).
  • Page 143 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “DHW” Group (continued) Coding in the factory set condition Possible change 62:10 DHW pump with a run-on time after DHW tank 62:0 DHW pump without run-on.

  • Page 144: Solar" Group

    Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Solar” Group Only in conjunction with solar control module, type SM1. Coding Coding in the factory set condition Possible change 00:8 The solar circuit pump starts when the...
  • Page 145 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Solar” Group (continued) Coding in the factory set condition Possible change 0D:1 Night circulation monitoring switched on. 0D:0 Night circulation monitoring switched off. Unintentional flow rate is captured in the solar circuit (e.g.
  • Page 146 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Solar” Group (continued) Coding in the factory set condition Possible change 23:4 Stop temperature differential for central heating 23:2 Stop temperature differential for backup: 4 K.

  • Page 147: Heating Circuit 1", "Heating Circuit 2", "Heating Circuit 3" Group

    Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Heating Circuit 1”, “Heating Circuit 2”, “Heating Circuit 3” Group Coding Coding in the factory set condition Possible change A0:0 Without remote control. A0:1 With Vitotrol 200A; automatic recognition.
  • Page 148 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Heating Circuit 1”, “Heating Circuit 2”, “Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change A6:36 Extended economy control disabled. A6:5 Extended economy control enabled, i.e.
  • Page 149 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Heating Circuit 1”, “Heating Circuit 2”, “Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change B6:0 With remote control: B6:1 With quick heat-up/quick setback (see Without quick heat-up/ quick setback.
  • Page 150 Coding 2, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service “Heating Circuit 1”, “Heating Circuit 2”, “Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change D8:0 No heating program changeover via extension...

  • Page 151: Connection And Wiring Diagram

    Wiring, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection and Wiring Diagram Overview Legend Main PCB low voltage Boiler coding card Main PCB 120V~ A10 LON communication module (accessory) A11 Power supply unit PCB Programming unit...
  • Page 152 Wiring, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection and Wiring Diagram (continued) Main PCB low voltage Legend Boiler water temperature sensor § aVD External hook-up %A No Function aVG KM BUS participant %B No Function...
  • Page 153 Wiring, Vitotronic 100 Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection and Wiring Diagram (continued) Main PCB 120 V~ Legend sÖ Circulation pump – flue gas/water heat exchanger abÖ External connections (remove jumper when connecting) Switching output...

  • Page 154: Connection And Wiring Diagram

    Wiring, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection and Wiring Diagram Overview Legend PCB, extension for heating circuits 2 and 3 with mixing valve A10 LON communication module (accessory) A11 Power supply unit PCB...
  • Page 155 Wiring, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection and Wiring Diagram (continued) PCB 120V~ Legend Heating circuit pump fÖ Power supply, 120V/60 Hz sÖ Central fault message Circulation pump for DHW tank heating gÖ...
  • Page 156 Wiring, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection and Wiring Diagram (continued) PCB low voltage Legend Outside temperature sensor External hook-up Supply temperature sensor KM BUS participant External hook-up %A DHW tank temperature sensor...
  • Page 157 Wiring, Vitotronic 300-K Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Connection and Wiring Diagram (continued) PCB, extension for heating circuits 2 and 3 with mixing valve Legend Supply temperature sensors Mixing valve motors sÖ Heating circuit pumps K1-K6 Relay fÖ...

  • Page 158: Sensors

    Components Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Sensors Boiler water, DHW tank, supply, return and room temperature sensors Note: H The supply temperature sensor can be used as a contact or immersion temperature sensor. Note: The supply temperature sensor in the mixing valve extension kit is a contact temperature sensor.

  • Page 159: Mixing Valve Motor Kit

    Components Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Mixing Valve Motor Kit Components: H Mixing valve motor (not for flanged mixing valve) H Connecting plug for the heating circuit pump H Supply temperature sensor as contact temperature sensor for measuring the supply temperature, with connecting cable 19 ft.

  • Page 160: Extension Ea1 Accessory (Optional)

    Components Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Extension EA1 Accessory (optional) Duration of the heating program changeover Contact constantly closed: The changeover is active as long as the contact is closed. Contact only closed briefly via push button: The changeover is enabled for the time selected in coding address “F2”...

  • Page 161: Parts List Vitotronic 100

    Parts Lists Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Parts List Vitotronic 100 Ordering Replacement Parts: Please provide model no. and serial no. from rating plate A when ordering replacement parts. Order replacement components from your Viessmann distributor.

  • Page 162: Parts List Vitotronic 300-K

    Parts Lists Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Parts List Vitotronic 300-K Part No. Serial No. 7533388 7514784 Please provide Serial Number A when ordering replacement parts. Order replacement components from your Viessmann distributor. Parts for Operating Enclosure Assembly...
  • Page 163 Specifications Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Parts List Vitotronic 300-K (continued) Part No. Serial No. 7533388 7514784 Parts for Connection Enclosure Assembly 0001 Housing, back 0002 Motherboard, cover 0003 Extension module MV 2+3 0004 Motherboard MB200...

  • Page 164: Specification Vitotronic 100

    Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service Specification Vitotronic 100 AND 300-K Vitotronic 300-K Vitotronic 100 Rated voltage 120V~ Rated voltage 120V~ Rated frequency 60 Hz Rated frequency 60 Hz Rated current Rated current 2 x 6A...

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