Viessmann VITOTRONIC 200 Installation And Service Instructions Manual
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Viessmann VITOTRONIC 200 Installation And Service Instructions Manual

Digital boiler control unit
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See also: Technical Data Manual , Installation and Service Instructions Manual
Installation and Service
Instructions
for use by heating contractor
Vitotronic 200, Type KW6B/HO1B
Digital boiler control unit
Vitotronic 300-K, Type MW2C
Weather-compensated, digital cascade control unit
VITOTRONIC
VITOTRONIC
Certified as a component
part for Viessmann boilers
5700 299 - 06
12/2016
200
r
300-K
r
Vitotronic 200
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 200

  • Page 1 Installation and Service Instructions for use by heating contractor Vitotronic 200, Type KW6B/HO1B Digital boiler control unit Vitotronic 300-K, Type MW2C Weather-compensated, digital cascade control unit VITOTRONIC VITOTRONIC 300-K Vitotronic 200 Vitotronic 300-K Product may not be exactly as shown...

  • Page 2: Safety, Installation And Warranty Requirements

    General Vitotronic 200, HO1B and 300-K, MW2C Installation/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

    Testing Actuators and Sensors on the Vitotronic 300-K..36 Adjusting the Heating Curve........37 Service Scans Calling up the Service Level - Vitotronic 200....39 Leaving the Service Level - Vitotronic 200....39 Scanning Operating Data - Vitotronic 200....40 Brief Scan - Vitotronic 200........40 Calling up the Service Menu - Vitotronic 300-K....41...
  • Page 4 Table of Contents Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Page Troubleshooting Fault Display.............46 Fault Codes..............47 Function Description, Vitotronic 200/300-K Boiler Water Temperature Control of the Vitotronic 200............53 Cascade Control of the Vitotronic 300-K.....53 Heating Circuit Control Unit of the Vitotronic 300-K..58 DHW Tank Temperature Control........63...

  • Page 5: About These Instructions

    Safety Vitotronic 200, HO1B and 300-K, MW2C Installation/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. Warnings draw your attention to the presence of WARNING potential hazards or important product information.

  • Page 6: For Your Safety

    Safety Vitotronic 200, HO1B and 300-K, MW2C Installation/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: System Example

    Preparing for Installation Vitotronic 200, HO1B and 300-K, MW2C Installation/Service System Example Multi boiler system with several heating circuits with mixing valve and low loss header (with/without DHW heating) Note: This scheme is a basic example without shut-off valves or safety equipment.

  • Page 8: Installation Information For The Vitotronic 200

    Code General 01:2 Multi boiler system with Vitotronic 300-K Note: Code “00:0” is set automatically. General Setting the boiler number at the Vitotronic 200 of the respective boiler 07:1 Boiler 1 (factory set condition) 07:2 Boiler 2 07:3 Boiler 3...

  • Page 9: Preparing Boilers For Cascade Mode - Vitodens 200-W

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Preparing Boilers for Cascade Mode - Vitodens 200-W IMPORTANT The following procedure must be done on each Vitodens 200-W boiler connected to the Vitotronic 300-K. Removing the front enclosure panel 1. Remove the external accessories connection box cover.
  • Page 10 Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Preparing Boilers for Cascade Mode - Vitodens 200-W (continued) Installation of the communication module/LON communication module The communication module is part of the standard delivery. 1. Installing the cascade communication module/LON communication module to the Vitotronic 200.
  • Page 11 Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Preparing Boilers for Cascade Mode - Vitodens 200-W (continued) Closing the control unit cover 1. Install the cover onto the control board. 2. Flip the control board back into position. 3. Secure the locking tabs as shown.

  • Page 12: Cu3A

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Preparing Boilers for Cascade Mode - Vitocrossal 300 CU3A Accessing the control electrical connections box 1. Remove the screws from the top panel and set aside. 2. Slide the top panel to the rear of the boiler and lift up.
  • Page 13 Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Preparing Boilers for Cascade Mode - Vitocrossal 300 CU3A (continued) LON communication module each Vitocrossal 300 CU3A comes with a LON communication module pre-installed. 1. Installing the cascade communication module/LON communication module to the Vitotronic 200.

  • Page 14: Configure Boilers For Cascade Mode

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Preparing Boilers for Cascade Mode - Vitocrossal 300 CU3A (continued) Fitting the top panels 1. Place the control cover on the control connection housing and slide into place. 2. Install previously removed nuts onto the threaded studs.

  • Page 15: Overview Of Electrical Connections, Vitotronic 300-K

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Overview of Electrical Connections, Vitotronic 300-K Legend PCB, extension for heating circuits 2 and 3 Main PCB 120V~ ? M2/M3 Supply temperature sensor sÖA1 Heating circuit pump sÖ M2/M3 Heating circuit pump...
  • Page 16 Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Overview of Electrical Connections, Vitotronic 300-K (continued) Legend A Vitotronic 300-K B DIN rail (located in junction box)

  • Page 17: Inserting The Lon Communication Module

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Mounting the Control Unit 1. Fasten metal backplate onto mounting surface with four fasteners. 2. Install connection enclosure onto backplate. 3. Fasten connection enclosure and midplate onto backplate with four fasteners.

  • Page 18: Inserting Cables/Leads And Applying Strain Relief

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/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 19: Connecting Pumps

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connecting Pumps Pumps 120V Legend Available pump connections A 120V pump outputs B To the control unit sÖA1 High temperature circuit pump/ C DIN rail in junction box tank loading primary pump Heating circuit 2 pump sÖM2...

  • Page 20: External Connection

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service 120V External Connection 120V pumps with an amperage draw of <2FLA A DIN rail B Pump 120V pumps with an amperage draw of >2FLA Contactor specification 120VAC 1A A DIN rail...

  • Page 21: Connecting Actuators

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/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 C 120V Valve Actuator...

  • Page 22: Connecting The Central Fault Message Facility

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connecting the Central Fault Message Facility Rated voltage 120V~ Rated current max. 2 FLA Note: Maximum pump and alarm output is 6 FLA shared between all 120V outputs. External Demand via Switching Contact...

  • Page 23: External Demand Via 0-10V Input

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service External Demand via 0 - 10V Input Demand for a system supply temperature set value. Connection to input 0 -10V at extension EA1 (accessory). See page 106. 0 - 1V no default set supply temperature set value 50°F (10°C)

  • Page 24: External "Mixing Valve Closed"/"Mixing Valve Open

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service External “Mixing Valve Close”/”Mixing Valve Open” Connection at plug avD The mixing valves are opened A or closed B when the contact is closed. Note: ‘Live’ contacts lead to short circuits or phase failure.

  • Page 25: Making The Lon Connection

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service External Heating Program Changeover (continued) Preselected heating program (Contact open) Coding Changed heating program (Contact closed) Central heating d5:0  Permanent operation with reduced room OFF/DHW OFF (factory set condition) temperature/ DHW OFF...
  • Page 26 Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Making the LON Connection (continued) Connection with on-site cable and LON plug The line may be up to ≤ 3000 ft. (900 m) (with LON plug) Legend A Boiler, control unit or Vitocom...

  • Page 27: Power Supply

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/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, 60 Hz, rating of 12A and 2-pole disconnect.

  • Page 28: Fitting The Control Unit Front

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/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 29: Opening The Control Unit

    Installation Sequence Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Opening the Control Unit 1. Remove the junction box cover screws and remove the cover. 2. Loosen the front housing screws. 3. Swing up the front part of the control housing.

  • Page 30: Changing The Language

    Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Changing the Language 1. Turn ON the ON/OFF switch on all control units. The Vitotronic 300-K integrated commissioning assistant starts automatically. 2. Make required settings: H “Language” H “Date / Time” H “Temperature units”...

  • Page 31: Selecting The Boiler Sequence (If Required)

    Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Selecting the Boiler Sequence (if required) Subject to the coding set in the “Cascade” group and internal control calculations, the control unit offers various boiler sequences. Coding that influence the boiler sequence: “38”...
  • Page 32 Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connecting the Control Unit to the LON System (continued) Vitotronic 200 set to Vitotronic 200 set to multi-boiler operating multi-boiler operating mode. Refer to page 9. mode. Refer to page 9. Boiler number 1 Boiler number 2 to ...
  • Page 33 Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connecting the Control Unit to the LON System (continued) Boiler equipped with Vitotronic 200, Vitotronic 300-K Installation and service and 200-H: instructions, Vitotronic 200-H The LON communication module (accessories) must be fitted (depending on boiler and package selected this may be an additional accessory).
  • Page 34 Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connecting the Control Unit to the LON System (continued) Vitotronic 200 set to Vitotronic 200 set to multi-boiler operating multi-boiler operating mode. Refer to page 9. mode. Refer to page 9. Boiler number 1 Boiler number 2 to ...

  • Page 35: Testing Actuators On The Vitotronic 200

    Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connecting the Control Unit to the LON System (continued) Carry out participant check from the home screen: 1. Tap “Menu”. 2. Select “Service”. 3. Enter “viservice” password. 4. Select “Service functions”. 5. “LON participant check”...

  • Page 36: Scanning Operating Details At The Vitotronic 200

    Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Scanning Operating Details at the Vitotronic 200 Calling up operating data 1. Press OK and simultaneously for approx. 4 sec. 2. “Diagnosis” 3. Select required group, e.g. “General”. Note: “- - -” appears on the display if a sensor that has been scanned is faulty.

  • Page 37: Adjusting The Heating Curve

    Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Testing Actuators and Sensors on the Vitotronic 300-K (continued) Information regarding the mixing valve motor rotational direction The supply temperature must rise when the mixing valve opens. If the temperature drops, either the motor is turning in the wrong direction or the mixing valve set is incorrectly fitted (observe the mixing valve installation instructions).
  • Page 38 Commissioning Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Adjusting the Heating Curve (continued) Selecting the set room temperature Individually adjustable for each heating circuit. The heating curve is offset along the axis of the set room temperature. With the heating circuit pump logic function enabled, the curve modifies the starting and stopping characteristics of the heating circuit pump.

  • Page 39: Calling Up The Service Level - Vitotronic 200

    Service Scans Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Calling up the Service Level - Vitotronic 200 1. Press OK and simultaneously for approx. 4 sec. 2. Select the required menu range. “Service” “Diagnosis” “General” “Brief scan” “Reset data” “Actuator test”...

  • Page 40: Scanning Operating Data - Vitotronic 200

    Service Scans Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Scanning Operating Data - Vitotronic 200 Operating data can be scanned in the “Information” menu. Refer to the Vitodens Operating Instructions Brief Scan - Vitotronic 200 1. Press OK and simultaneously for approx. 4 sec.

  • Page 41: Calling Up The Service Menu - Vitotronic 300-K

    Service Scans Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Calling up the Service Menu - Vitotronic 300-K From the home screen tap the following buttons: 1. “Menu” 2. “Service” 3. Enter “viservice” password. 4. Select the required menu range. “Service”...

  • Page 42: Leaving The Service Menu - Vitotronic 300-K

    Service Scans Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Leaving the Service Menu - Vitotronic 300-K From the home screen tap the following buttons: 1. Select “Close”. 2. Confirm “End service?” with OK. Note: The system exits the service menu automatically after 30 min.

  • Page 43: Scanning Operating Data - Vitotronic 300-K

    Service Scans Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Scanning Operating Data - Vitotronic 300-K Operating data can be scanned in various areas (see “Diagnosis” on page 41). Operating data on heating circuits with mixing valves and a solar thermal system can only be scanned if the relevant components are installed in the system.

  • Page 44: Brief Scan - Vitotronic 300-K

    Service Scans Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Brief Scan - Vitotronic 300-K In the brief scan, you can scan temperatures, software versions and connected components, for example. From the home screen tap the following buttons: 1. “Menu” 2. “Service”...

  • Page 45: Maintenance Display

    Service Scans Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Maintenance Display Service notification limits are set via coding “1f”, “21” and “23” in the “Boiler” group. Once these values have been reached, “Service” appears on the display. Tap the following buttons: 1.

  • Page 46: Fault Display

    Troubleshooting Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Fault Display In the event of a fault, the red fault display flashes at the control unit. The display shows “Fault”. For an explanation of fault codes, see chapter “Fault codes”. Note: If a central fault message facility is connected, this is started.

  • Page 47: Fault Codes

    Troubleshooting Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Fault Codes Fault codes Displayed fault code System characteristics Cause Measures Activates at 32°F (0°C) outdoor Short circuit, outdoor Check the outdoor temperature temperature sensor temperature sensor (see page 105). Activates at 32°F (0°C) outdoor...
  • Page 48 Troubleshooting Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Fault Codes (continued) Fault codes Displayed fault code System characteristics Cause Measures With tank loading system: Short circuit, DHW tank Check the DHW tank DHW tank heating is started and temperature sensor 2...
  • Page 49 Troubleshooting Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Fault Codes (continued) Fault codes Displayed fault code System characteristics Cause Measures With tank loading system: Lead break, temperature Check temperature sensor Mixing valve primary circuit sensor aJB (see page 105) “Closed”; no DHW heating Without temperature sensor: Set code “4b:0”...
  • Page 50 Troubleshooting Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Fault Codes (continued) Fault codes Displayed fault code System characteristics Cause Measures No solar DHW heating. Short circuit, DHW tank Check sensor at the solar temperature sensor, connection control unit (see separate...
  • Page 51 Troubleshooting Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Fault Codes (continued) Fault codes Displayed fault code System characteristics Cause Measures Control mode. Internal fault Check correct insertion of PCB (see parts list). Constant mode. Invalid hardware recognized Check coding address “92”...
  • Page 52 Troubleshooting Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Fault Codes (continued) Fault codes Displayed fault code System characteristics Cause Measures Control mode. Communication error EA1 Check connections extension (see page 106). Without extension EA1: Set code “5b:0” in the “General” group.

  • Page 53: Boiler Water Temperature Control Of The Vitotronic 200

    Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Boiler Water Temperature Control of the Vitotronic 200 Brief description H The boiler water temperature is regulated by modulating burner up or down as required. H The set boiler water temperature is defaulted by the Vitotronic 300-K.
  • Page 54 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Cascade Control of the Vitotronic 300-K (continued) Set supply temperature The set supply temperature is determined from the following coding: H Set supply temperatures of the heating circuit without...
  • Page 55 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Cascade Control of the Vitotronic 300-K (continued) Examples of the various control strategies Shutdown Starting Examples of system with 2 condensing boilers. Control strategies Condensing strategy (coding “3c:0” in the Condensing strategy “Cascade”...
  • Page 56 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Cascade Control of the Vitotronic 300-K (continued) Shutdown Starting Examples of conventional boiler strategy 1 Conventional boiler strategy 1 (coding “3c:1” in the “Cascade” group) Benefit: As few boilers as possible are active. Set coding “3c:1”...
  • Page 57 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Cascade Control of the Vitotronic 300-K (continued) Shutdown Starting Examples of conventional boiler strategy 2 Conventional boiler strategy 2 (coding “3C:2” in the “Cascade” group) Benefit: Long burner runtimes. Coding “3c:2” in the “Cascade”...

  • Page 58: Heating Circuit Control Unit Of The Vitotronic 300-K

    Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Heating Circuit Control Unit of the Vitotronic 300-K Brief description H The control unit has control circuits for one heating circuit without mixing valve A1 (heating circuit 1) and two heating circuits with mixing valve M2 (heating circuit 2) and M3 (heating circuit 3).
  • Page 59 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Heating Circuit Control Unit of the Vitotronic 300-K (continued) Room temperature In conjunction with a remote control and room temperature hook-up (coding “b0” in the “Heating circuit...”) group: Compared with the outdoor temperature, the room temperature has a greater influence on the set supply temperature (changed at coding “b2”...
  • Page 60 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Heating Circuit Control Unit of the Vitotronic 300-K (continued) Extended economy mode The heating circuit pump is switched off (set supply temperature set to 32°F (0°C) if one of the following...
  • Page 61 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Heating Circuit Control Unit of the Vitotronic 300-K (continued) Supply temperature control Differential temperature: The differential temperature can be set at coding “9f” in the “General” group, factory set condition 15°F (8 K).
  • Page 62 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Heating Circuit Control Unit of the Vitotronic 300-K (continued) Control sequence Mixing valve circuit The mixing valve motor will not be controlled within the “neutral zone” ±2°F (±1 K).

  • Page 63: Dhw Tank Temperature Control

    Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service DHW Tank Temperature Control Brief description Priority control H The tank temperature control is a constant temperature H With priority control: (coding “a2:2” in the “Heating control function. This is achieved by starting and circuit...”...
  • Page 64 Function Description, Vitotronic 200/300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service DHW Tank Temperature Control (continued) Coding “55:2” in the “DHW” group; System with tank loading system tank temperature control with 2 tank temperature sensors The above functions also apply in conjunction with tank Tank temperature sensor 1 enables the DHW pump for loading systems.

  • Page 65: Calling Up Coding Level 1

    Coding 1 Vitotronic 200 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Calling up Coding Level 1 Prior to coding the Vitotronic 200, ensure the boiler is in cascade mode. See below. For the Vitotronic 200, see boiler Service Instructions 1. Press and OK for approximately 4 seconds.

  • Page 66: General" Group

    Coding 1 Vitotronic 200 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group Coding Coding in the factory setting Possible change System design (boiler connected to cascade) 00:0 00:1 Do Not Adjust 00:10 Participant no. 77:1 LON participant 77:2 LON participant number, adjustable from 1 to 99:...

  • Page 67: Calling Up Coding Level 2

    Coding 2 Vitotronic 200 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Calling up Coding Level 2 Prior to coding the Vitotronic 200, ensure the boiler is in cascade mode. See below. For the Vitotronic 200, see boiler Service Instructions 1. Press and OK for approximately 4 seconds.
  • Page 68 Coding 2 Vitotronic 200 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group Select “General” Coding Coding in the factory setting Possible change 32:0 Without extension AM1 32:1 With extension AM1 (automatic recognition). 35:1 With extension EA1 (automatic 35:0 Without extension EA1.
  • Page 69 Coding 2 Vitotronic 200 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group (continued) Coding Coding in the factory setting Possible change 3C:0 Function input DE3 at extension EA1: 3C:1 Function input DE3: Heating program - changeover. Not assigned 3C:2 Function input DE3: External demand with set supply temperature.
  • Page 70 Coding 2 Vitotronic 200 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group (continued) Coding Coding in the factory setting Possible change 81:1 Automatic summer/wintertime 81:0 Manual summer/wintertime changeover. changeover 81:2 Use of the radio clock receiver (automatic recognition). 81:3 With LON communication module: The control unit receives the time.

  • Page 71: Boiler" Group

    Coding 2 Vitotronic 200 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Boiler” Group (continued) Coding Coding in the factory setting Possible change 0D:0 Do not adjust! 0E:0 Do not adjust! 13:1 Do not adjust! 14:1 Do not adjust! 15:1 Do not adjust!

  • Page 72: Calling Up Coding Levels

    Coding Levels Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Calling up Coding Levels Display for coding levels H The coding display is defaulted by the heating system configuration (see page 30). H Coding are split into the following groups: – “General”...

  • Page 73: General" Group

    Coding 1 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group Coding Coding in the factory set condition Possible change System design 00:1 System version 1: 00:2 For system schemes, see the following table: One heating circuit without mixing valve A1...
  • Page 74 Coding 1 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group (continued) Coding Coding in the factory set condition Possible change “Automatic summer/wintertime changeover” 81:1 Automatic summer/wintertime changeover. 81:0 Manual summer/wintertime changeover. 81:2 Do not adjust! 81:3 With LON communication module: The control unit receives the time.

  • Page 75: Cascade" Group

    Coding 1 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Cascade” Group Coding Coding in the factory set condition Possible change “Number of boilers connected to the cascade” 35:8 8 boilers connected to the Vitotronic 300-K. 35:1 1 to 8 boilers connected to the Vitotronic 300-K.
  • Page 76 Coding 1 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Cascade” Group (continued) Coding Coding in the factory set condition Possible change “ECO threshold boiler 3” 43:31 No ECO threshold boiler 3 (see page 31). 43:−30 ECO threshold boiler 3 adjustable from -22 to 86°F (−30 to +30°C).

  • Page 77: Dhw" Group

    Coding 1 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “DHW” Group Coding Coding in the factory set condition Possible change “Storage tank heating, hysteresis” 55:0 Tank heating hysteresis ± 2.5 K. 55:1 Adaptive storage tank heating enabled (see page 64).

  • Page 78: Heating Circuit 1, Heating Circuit 2, Heating Circuit 3" Group

    Coding 1 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group Coding Coding in the factory set condition Possible change “Storage tank priority” a2:2 Storage tank priority control a2:0 Without DHW tank priority applicable to heating circuit...
  • Page 79 Coding 1 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change “Pump idle time” a9:0 Without pump idle time a9:1 With pump idle time, adjustable from 1 to 15: (see function description, page 60).
  • Page 80 Coding 1 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change “EA1 extension: Operating program changeover” d8:0 No operating program changeover...

  • Page 81: General" Group

    Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group Coding Coding in the factory set condition Possible change 00:1 System version 1: 00:2 For system schemes, see the following table: One heating circuit without mixing valve A1...
  • Page 82 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group (continued) Coding in the factory set condition Possible change “Connection at plug sÖA1” 4c:0 4c:1 Primary pump, primary store system. Connection at plug sÖA1: heating circuit pump.
  • Page 83 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group (continued) Coding in the factory set condition Possible change “Function input DE2 at EA1 extension” 5e:0 Function input DE2 at extension EA1: 5e:1 Operating program changeover. No function.
  • Page 84 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group (continued) Coding in the factory set condition Possible change “Central control of heating circuits” 7a:0 Without central control of heating 7a:1 With central control (see page 76) Heating circuit circuits without mixing valve A1 (heating circuit 1).
  • Page 85 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group (continued) Coding in the factory set condition Possible change “Wintertime starts: Day of the selected month” 87:7 Wintertime starts: 87:1 Monday to Sunday Last Sunday of the selected month 87:7 “Temperature displayed”...
  • Page 86 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “General” Group (continued) Coding in the factory set condition Possible change “Connection at terminals 2 and 3 in plug avD” 99:0 99:1 No function Connection at terminals 2 and 3 in plug avD disabled (external blocking/ external “Mixing...

  • Page 87: Cascade" Group

    Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Cascade” Group Coding Coding in the factory set condition Possible change “Number of boilers connected to the cascade” 35:8 8 boilers connected to the Vitotronic 300-K 35:1 1 to 8 boilers connected to the Vitotronic 300-K 35:8 “Minimum system supply temperature limit”...
  • Page 88 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Cascade” Group (continued) Coding in the factory set condition Possible change “Tank priority control for system pump” 3f:0 Without DHW tank priority control for 3f:1 With DHW tank priority control for system pump system pump “ECO threshold boiler 1”...

  • Page 89: Dhw" Group

    Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “DHW” Group Coding Coding in the factory set condition Possible change “Storage tank heating, hysteresis” 55:0 DHW tank heating, hysteresis ± 2.5 K 55:1 Adaptive storage tank heating enabled (see page 64).
  • Page 90 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “DHW” Group (continued) Coding in the factory set condition Possible change “For solar DHW heating: DHW temperature target” 67:40 For solar DHW heating: DHW temperature 67:0 No set value 3.

  • Page 91: Solar" Group

    Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Solar” Group Only in conjunction with solar control module, type SM1. Coding Coding in the factory set condition Possible change “Differential between the actual DHW temperature and the start point for the solar circuit pump”...
  • Page 92 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Solar” Group (continued) Coding in the factory set condition Possible change “Stagnation time reduction” 0a:5 Temperature differential for reducing the 0a:0 Stagnation time reduction disabled. stagnation time (reduction in solar circuit...
  • Page 93 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Solar” Group (continued) Coding in the factory set condition Possible change “Minimum collector temperature” 12:20 Minimum collector temperature 12:0 No minimum limit enabled (minimum start temperature for the solar...
  • Page 94 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Solar” Group (continued) Coding in the factory set condition Possible change “Priority for DHW storage tank 1” 26:1 Priority for DHW storage tank 1 26:0 Priority for DHW storage tank 1...

  • Page 95: Heating Circuit 1, Heating Circuit 2, Heating Circuit 3" Group

    Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group Coding Coding in the factory set condition Possible change “Remote control” a0:0 Without remote control a0:1 With Vitotrol 200A recognized automatically.
  • Page 96 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change “Frost protection” a4:0 With frost protection a4:1 No frost protection; this setting is only possible if coding “a3:–9”...
  • Page 97 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change “Room temperature hook-up” b0:0 With remote control:*1 b0:1 Heating mode: weather compensated...
  • Page 98 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change “Learning start optimization” b9:0 With remote control and for the heating circuit,...
  • Page 99 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change “External operating program changeover” d5:0 With external operating program changeover d5:1 Changeover to “Constant operation with...
  • Page 100 Coding 2 Vitotronic 300-K Vitotronic 200, HO1B and 300-K, MW2C Installation/Service “Heating Circuit 1, Heating Circuit 2, Heating Circuit 3” Group (continued) Coding in the factory set condition Possible change “Time limit for comfort mode” f2:8 Time limit for comfort mode or external...

  • Page 101: Connection And Wiring Diagrams

    Designs Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connection and Wiring Diagrams For the Vitotronic 200, refer to the boiler Overview Service Instructions. Legend A1 Extension PCB heating circuits 2 and 3 A2 PCB, low voltage A3 PCB 120V~ A6 Programming unit connection PCB...
  • Page 102 Designs Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connection and Wiring Diagrams (continued) PCB 120V~ Legend sÖ A1 Heating circulation pump Primary pump, tank loading system DHW pump (accessory) DHW recirculation pump (accessories) Distribution pump fÖ Power supply 120V/60 Hz Output for central fault message gÖ...
  • Page 103 Designs Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connection and Wiring Diagrams (continued) LV PCB Legend Outdoor temp. sensor §/? Common supply temperature sensor Tank temperature sensor Tank temperature sensor 2 (accessory) aJB B Temperature sensor tank loading system External hook-up...
  • Page 104 Designs Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Connection and Wiring Diagrams (continued) PCB, extension for heating circuits 2 and 3 with mixing valve Legend ? M2/M3 Supply temperature sensors sÖ M2/M3 Heating circuit pumps Power supply fÖ gS M2/M3 Mixing valve motors...

  • Page 105: Sensors

    Components Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Sensors DHW tank, supply and room temperature sensor Note: - The supply temperature sensor can be used as a contact or immersion temperature sensor. - The room temperature sensor is connected at terminals 3 and 4 in the Vitotrol 300A.

  • Page 106: Extension Ea1 Accessory

    Components Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Extension EA1 Accessory 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 pushbutton: The changeover is enabled for the time selected in coding address “f2”...
  • Page 107 Components Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Extension EA1 Accessory (continued) EA1 extension Legend Digital input 1 Digital input 2 Digital input 3 0 - 10V 0 - 10V input fÖ Power supply Power supply for additional accessories fÖA...

  • Page 108: Parts List - Vitotronic 300-K

    Parts Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Parts List - Vitotronic 300-K For the Vitotronic 200, see boiler Service Instructions Part No. Serial No. 7776084 7554896 Ordering Parts: Please provide Serial Number A when ordering replacement parts. Order replacement components from your Viessmann distributor.
  • Page 109 Parts Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Parts List - Vitotronic 300-K Part No. Serial No. 7776084 7554896 Parts for Connection Enclosure Assembly 0001 Housing, back 0002 Cover, motherboard 0003 Extension module for mixing valve 2+3 0004 Motherboard (low voltage, MB200)

  • Page 110: Specification Vitotronic 300-K

    Specification Vitotronic 200, HO1B and 300-K, MW2C Installation/Service Specification Vitotronic 300-K For the Vitotronic 200, see boiler Service Instructions Rated voltage 120V~ Rated frequency 60 Hz Rated current Power consumption 10 W Permiss. ambient temperature H during operation 32 to 104°F (0 to 40°C) Installation...
  • Page 111 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service...
  • Page 112 Vitotronic 200, HO1B and 300-K, MW2C Installation/Service...

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