Viessmann VITODENS 300 Service Instructions Manual
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Viessmann VITODENS 300 Service Instructions Manual

6.6 to 35.0 kw gas fired wall mounted condensing boiler natural gas and lpg version
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See also: Instruction and Installation Manual , Installation Manual
VIESMANN

Service instructions

for heating engineers
Vitodens 300
Type WB3A, 6.6 to 35.0 kW
Gas fired wall mounted condensing boiler
natural gas and LPG version
See applicability on the last page
VITODENS 300
Please keep safe
5692 537 GB
6/2004

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Summary of Contents for Viessmann VITODENS 300

  • Page 1: Service Instructions

    VIESMANN Service instructions for heating engineers Vitodens 300 Type WB3A, 6.6 to 35.0 kW Gas fired wall mounted condensing boiler natural gas and LPG version See applicability on the last page VITODENS 300 Please keep safe 5692 537 GB 6/2004...

  • Page 2: Safety Instructions

    Safety instructions Safety instructions Please follow these safety instructions closely to prevent accidents and material losses. & Safety instructions explained the Code of Practice by relevant trade associations and all local reg- Danger ulations. & This symbol warns against the all current safety regulations as risk of injury.
  • Page 3 For conversions or replace- ments, use only original spare Repair work parts from Viessmann or those which are approved by Viess- Important information mann. Repairing components which fulfil a safety function can com- promise the safe operation of your heating system.

  • Page 4: Table Of Contents

    Index Index Initial start-up, inspection, maintenance Steps - initial start-up, inspection and maintenance ........Further details regarding the individual steps ..........Coding Code 1......................40 Code 2......................43 Resetting the coding to the delivered condition ........... 63 Service scans Service level summary ................64 Temperatures, boiler coding card and brief scans ........

  • Page 5: Initial Start-Up, Inspection, Maintenance

    Initial start-up, inspection, maintenance Steps - initial start-up, inspection and maintenance For further instructions on individual steps, see pages indicated Commissioning steps Inspection steps Maintenance steps Page • 1. Filling the heating system ..........•...

  • Page 6: Commissioning Steps

    Initial start-up, inspection, maintenance Steps - initial start-up, inspection and maintenanc . . . (cont.) Commissioning steps Inspection steps Maintenance steps Page • • 21. Checking the condensate drain and cleaning the siphon ..................•...

  • Page 7: Further Details Regarding The Individual Steps

    Initial start-up, inspection, maintenance Further details regarding the individual steps Filling the heating system Important information Unsuitable fill water increases the level of deposits and corrosion and may lead to boiler damage. & Thoroughly flush the entire heating system prior to filling with water.
  • Page 8 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 4. If the control unit had already been 5. Close the boiler fill & drain valve switched ON before filling began: Start the control unit and in code 1, set coding address 2F:2.

  • Page 9: Venting The Boiler

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Venting the boiler 1. Close the shut-off valves on the heating water side. 2. Connect the drain hose on the upper valve B with a drain outlet. 3. Open valves A and B, and vent at mains pressure, until no sound of escaping air can be heard.

  • Page 10: Venting The Heating System

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Venting the heating system 1. Close the gas shut-off valve and 2. Activate the venting program via start the control unit. coding address 2F:1. Note To call up code 1 and for setting the coding address, see page 40.

  • Page 11: Set The Time And Date (If Required) - Only For Weather-Compensated Control Units

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 5. Confirm with d. 4. Select the required language with Set the time and date (if required) - only for weather-compen- sated control units Note During commissioning, or after prolonged time out of use, it may be necessary to set the time and date.

  • Page 12: Gas Type Conversion

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 4. Set the gas type via coding 5. Record the gas type in the service address 1E at the control unit. report on page 120. Note To call up code 1 and for setting the coding address, see page 40.
  • Page 13 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Differential pres- After approx. Check fan cables sure sensor 51 seconds and fan plug-in enables start Fault connections, (0.75 V across check fan terminals X8.5 and X8.6) Ignition Fault Check the ignition module (control voltage 230 V...

  • Page 14: Checking Static And Supply Pressure

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking static and supply pressure Danger Higher CO emissions can lead to poisoning. Measure the CO value before and after any work on gas equipment to prevent any health hazards and to ensure the perfect operational condi- tion of the system.
  • Page 15 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 6. Check the supply (flow) pressure; it should be & 20 mbar for natural gas, & 50 mbar for LPG. Note Use suitable test equipment with a resolution of at least 0.1 mbar to measure the supply pressure.

  • Page 16: Checking The Co 2 Settings

    (cont.) Checking the CO settings Vitodens 300 is factory-set for natural gas E, and can be converted to natural gas LL or LPG P using a conversion kit. During commissioning or maintenance, check the CO level at the boiler adap- tor.
  • Page 17 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 1. Connect a flue gas analyser at the flue gas aperture A on the boiler adaptor. 2. Open the gas shut-off valve, com- mission the boiler and create a heat demand.

  • Page 18: Setting The Max. Output

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 7. Check the CO content. Should the actual value deviate by more than 1 % from the above range, imple- ment steps from page 16 (possibly replace the burner). 8.

  • Page 19: Checking The Balanced Flue System For Soundness (Annular Gap Check)

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking the balanced flue system for soundness (annular gap check) For balanced flue systems tested together with the gas fired wall mounted boiler, some Federal States (e.g. Northrhein-Westphalia) waive the requirement for a soundness test (overpressure test) during commis- sioning by the flue gas inspector.

  • Page 20: Removing The Burner And Checking The Burner Gasket (Replace Gasket Every Two Years)

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Removing the burner and checking the burner gasket (replace gasket every two years) 5. Release four nuts H and remove 1. Switch OFF the control unit ON/ OFF switch and the mains electri- the burner.

  • Page 21: Checking The Burner Gauze Assembly

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking the burner gauze assembly Replace the burner gauze assembly if the wire mesh is damaged. 1. Remove electrodes A. 4. Insert a new burner gauze assem- bly with a new gasket, and secure 2.

  • Page 22: Checking And Adjusting The Ignition And Ionisation Electrodes

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking and adjusting the ignition and ionisation electro- A Ignition electrodes B Ionisation electrode 1. Check the electrodes for wear and 3. Check all clearances. If the gaps contamination. are not as specified or the electro- des are damaged, replace and 2.

  • Page 23: Cleaning The Combustion Chamber/Heating Surfaces And Installing The Burner

    Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Cleaning the combustion chamber/heating surfaces and installing the burner 1. If required, clean combustion chamber A and heating surfaces B with a brush or flush with water. Important information Scratches on parts which are in contact with flue gases, can lead to corrosion.
  • Page 24 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 3. Secure the gas supply pipe with a new gasket. 4. Check the gas connections for soundness. Danger Escaping gas leads to a risk of explosion. Check all fittings for sound- ness.
  • Page 25 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Flow limiter (only for gas combination boilers) 1. Switch OFF the control unit, shut off the cold water supply line and drain the secondary (DHW) side of the boiler. 2.
  • Page 26 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Checking the ionisation current 1. Remove the cable and connect test equipment (adaptor line available as accessory). 2. Set the upper rated output. Constant temperature control units: Press K and d simultaneously &...
  • Page 27 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Matching the control unit to the heating system Note The control unit must be matched to the system equipment. Various system components are automatically recognised by the control unit, and codes are automatically set.
  • Page 28 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) System design 2 With/without DHW heating with 1 heating circuit without mixer A1 and 1 heating circuit with mixer M2 Note The volume flow of the heating circuit without mixer must be at least 30 % greater than the volume flow of the heating circuit with mixer.
  • Page 29 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) System design 3 With/without DHW heating with 1 heating circuit without mixer A1 and 1 heating circuit with mixer M2 and system separation Outside temperature sensor Maximum temperature controller Flow temperature sensor (underfloor heating) Cylinder temperature sensor...
  • Page 30 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) System design 4 With/without DHW heating with 1 heating circuit without mixer A1 with separate heating circuit pump and 1 heating circuit with mixer M2 Outside temperature sensor Mains supply (extension kit) aVG KM BUS Flow temperature sensor Cylinder temperature sensor...
  • Page 31 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Required coding Address Max. speed of the internal circulation pump in heating 31:20 mode: 20 % System design 5 With/without DHW heating with 1 heating circuit with mixer M2 (with exten- sion kit), 1 heating circuit with mixer (Vitotronic 050) and low loss header Outside temperature sensor Extension kit for 1 heating circuit...
  • Page 32 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) System design 6 With 1 heating circuit without mixer A1, solar panels and Vitocell-W 100 DHW cylinder (type CVB) installed adjacent to the boiler Outside temperature sensor Cylinder temperature sensor for aVG KM BUS solar operation Solar-Divicon...
  • Page 33 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Required coding Address Set DHW temperature 3 at 40 °C (check delivered condition) 67:40 Operation with natural gas (as delivered condition) 1E:0 Operation with LPG 1E:1 Connecting the control unit to the LON system (only for weather-compensated control units) The LON communication module (accessory) must be plugged in.
  • Page 34 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Single boiler system with Vitotronic 050 and Vitocom 300 Boiler control Vitotronic 050 Vitotronic 050 Vitocom unit User no. 1 User no. 10 User no. 11 User no. 99 Code 77:1 Code 77:10 Set code 77:11...
  • Page 35 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) 1. Press L and d simultaneously for approx. 2 seconds. User check initiated. 2. Select the required user with a and b. 3. Activate checking with d. "Check" flashes until its comple- A Consecutive list number tion.
  • Page 36 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Changing slope and level 1. Modify the slope in code 1 with cod- ing address d3 (see page 40). Value adjustable from 2 to 35 (equals slope 0.2 to 3.5). 2.
  • Page 37 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Adjusting the set room temperature Standard room temperature: 1. For two heating circuits – select heating circuit: Press a. & 1r flashes on the display. & Select heating circuit A1 (heating circuit without mixer): Press d.
  • Page 38 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Reduced room temperature: 1. For two heating circuits – select heating circuit: Press a. & 1r flashes on the display. & Select heating circuit A1 (heating circuit without mixer): Press d.
  • Page 39 Initial start-up, inspection, maintenance Further details regarding the individual steps (cont.) Instructing the system user The system installer must hand the operating instructions to the system user and instruct them in the operation of the system. Scanning and resetting the "Maintenance" display The red fault indicator flashes when the limits set via coding address 21 and 23 have been reached.

  • Page 40: Coding

    Coding Code 1 Call up code 1 1. Press K and L simultaneously 3. Change this value with a and b; confirm with d. The display briefly for approx. 2 seconds. shows "adopted", then the address 2. Select the required coding address flashes again.
  • Page 41 Coding Code 1 (cont.) Summary Codes Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value System design 00:1 System design 1: 00:2 System design 1, 6: 1 heating circuit without 1 heating circuit without mixer A1, without DHW mixer A1, with DHW heat- heating...
  • Page 42 Coding Code 1 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value User no. 77:1 LON user number 77:2 LON user number, adjus- table from 1 to 99: 77:99 1 - 4 = boiler 5 = cascade 10 - ...

  • Page 43: Code 2

    Coding Code 1 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value Slope A1 d3:14 Heating curve slope = d3:2 Heating curve slope adjustable from 0.2 to 3.5 d3:35 (see page 35) Slope M2 d3:14 Heating curve slope =...

  • Page 44: Overall Summary

    Coding Code 2 (cont.) Overall summary The coding addresses are grouped in accordance with the following function ranges. The respective function range is displayed. Scroll through the ranges in the following sequence with a or b. Function range Coding addresses System design Boiler/burner 06 to 54...
  • Page 45 Coding Code 2 (cont.) Codes Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value System design 00:1 System design 1: 00:2 System design 1, 6: 1 heating circuit without 1 heating circuit without mixer A1, without DHW mixer A1, with DHW heat- heating...
  • Page 46 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value 23:0 No time interval for bur- 23:1 Time interval adjustable ner maintenance from 1 to 24 months 23:24 24:0 No "Maintenance" dis- 24:1 "Maintenance"...
  • Page 47 Coding Code 2 (cont.) Coding Internal Heating cir- Heating circuit Cylinder loading circula- cuit pump pump pump tion pump Heating cir- Heating circuit cuit without with mixer mixer Control Control funct. Control funct. Control funct. funct. Control Control funct. Control funct. funct.
  • Page 48 Coding Code 2 (cont.) Coding Internal Heating cir- Heating cir- Cylinder loading pump circulation cuit pump cuit pump pump Heating cir- Heating cir- cuit without cuit with mixer mixer Control Control Control funct. Control funct. funct. funct. Control Control Control funct. OFF funct.
  • Page 49 Coding Code 2 (cont.) Coding Internal Heating cir- Heating cir- Cylinder loading pump circulation cuit pump cuit pump pump Heating cir- Heating cir- cuit without cuit with mixer mixer Control funct. OFF Control funct. Coding in Function mode Coding Possible change the as change delivered...
  • Page 50 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value 58:0 Without auxiliary func- 58:1 Input of DHW set value 2; tion for DHW loading adjustable from 1 to 58:95 95 °C (observe coding address 56) 59:0...
  • Page 51 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value 6C:100 Set speed internal DHW 6C:0 Set speed adjustable loading pump 100 % from 0 to 100 % 6C:100 6F:100 Max.
  • Page 52 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value 77:1 LON user number 77:2 LON user number, adjus- table from 1 to 99: 77:99 1 - 4 = boiler 5 = cascade 10 - ...
  • Page 53 LON BUS to any connected Vitotro- nic 050 98:1 Viessmann system 98:1 System number adjusta- numbers (in conjunction ble from 1 to 5 with monitoring of sev- 98:5...
  • Page 54 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value 9b:0 No minimum set boiler 9b:1 Set temperature adjusta- water temperature in ble from 1 to 127 °C case of external 9b:127 demand 9C:20...
  • Page 55 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value A3:2 Outside temperature A3:-9 Heating circuit pump ON/ below 1 °C: Heating cir- OFF (see the following cuit pump ON A3:15 table) Outside temperature...
  • Page 56 Coding Code 2 (cont.) Parameters Heating circuit pump Address A3:... ON at OFF at 14 °C 16 °C Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value Boiler circuit, mixer circuit A4:0 With frost protection A4:1 No frost protection, adjustment only possible...
  • Page 57 Coding Code 2 (cont.) Parameter address With heating circuit pump logic function: Heating A5:... circuit pump OFF, if AT > RT + 3 K AT > RT + 2 K AT > RT + 1 K AT > RT AT > RT - 1 K AT >...
  • Page 58 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value A7:0 Without mixer econ- A7:1 With mixer economy omy function function (extended heat- ing circuit pump logic): Heating circuit pump also OFF, if the mixer was closed for longer than 20 minutes.
  • Page 59 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value b0:0 With remote control: b0:1 Heating mode: Weather- Heating mode/reduced compensated mode: Weather-com- Reduced mode: With room temperature hook- pensated b0:2 Heating mode: With room temperature hook-up...
  • Page 60 Coding Code 2 (cont.) Parameter With heating circuit pump logic function: Heating cir- address b5:... cuit pump OFF, if active RT > RT - 1 K; passive RT < RT - 2 K Actual Actual active RT > RT - 2 K; passive RT <...
  • Page 61 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value E2:99 Display correction +4.9 K E5:0 Without variable E5:1 With variable speed cir- speed circuit pump cuit pump; automatic recognition E6:65 Max.
  • Page 62 Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value & Heat-up data with respective flow tem- peratures & Max. flow temperature achieved & Operating condition and outside tempera- ture during handover. The function continues after power failure or after the control unit has...

  • Page 63: Resetting The Coding To The Delivered Condition

    Coding Code 2 (cont.) Coding in Function mode Coding Possible change the as change delivered Address: condition value Address: value ing mode, the internal mode, the internal circu- circulation pump is per- F6:24 lation pump will be manently OFF started 1 to 24 times per day for 10 minutes respectively F6:25...

  • Page 64: Service Scans

    Service scans Service level summary Function Key combination Exit Page Press K and G simulta- Press d Temperatures, boiler cod- ing card and brief scans neously for approx. 2 seconds Press K and d simulta- Press d Relay test neously for approx. 2 seconds Press K and F simulta- Press d...

  • Page 65: Temperatures, Boiler Coding Card And Brief Scans

    Service scans Temperatures, boiler coding card and brief scans Weather-compensated control units 1. Press K and G simultaneously 2. Select the required scan with a and b. for approx. 2 seconds. 3. Press d. The following values can be scanned, subject to the actual equipment level: Slope A1 –...
  • Page 66 Service scans Temperatures, boiler coding card and brief scans (cont.) Display screen Brief scan System design 1 to Display Max. demand temperature KM BUS indication in accor- users dance with the rele- vant design Flow Software Software Software Software Software switch version version...
  • Page 67 Service scans Temperatures, boiler coding card and brief scans (cont.) Display screen Brief scan Heating circuit 1 Heating circuit 2 (boiler circuit A1) (mixer circuit M2) Remote Software Remote Software control version control version 0: excl. Remote 0: excl. Remote 1: Vito- control 1: Vito-...
  • Page 68 Service scans Temperatures, boiler coding card and brief scans (cont.) Display screen Brief scan Flow System Software version Software switch design, Control unit version position indication User inter- in accor- face dance with the design Software Software version Software Software version Burner control unit version...

  • Page 69: Checking Outputs (Relay Test)

    Service scans Temperatures, boiler coding card and brief scans (cont.) Display screen Brief scan Variable Software speed version pump Variable 0: excl. speed pump 1: Wilo 2: Grund- Checking outputs (relay test) Weather-compensated control units 1. Press K and d simultaneously 2.
  • Page 70 Service scans Checking outputs (relay test) (cont.) Display Description Solar pump ON Vitosolic Constant temperature control units 1. Press K and d simultaneously 2. Select the relay outputs with a and b. for approx. 2 seconds. Relay test enabled. 3. Press d. Relay test enabled.

  • Page 71: Scanning Operating Conditions And Sensors

    Service scans Scanning operating conditions and sensors Weather-compensated control units 1. For two heating circuits – select 2. Press c. heating circuit: Press a. & 3. Select the required operating con- dition scan with a or b. 1r flashes on the display. &...
  • Page 72 Service scans Scanning operating conditions and sensors (cont.) Operating condition display Description (subject to system equip- ment level) Date Burner OFF or ON Int. pump OFF or ON Output 20 Int. output OFF or ON Internal extension Heating pump OFF or ON External extension or extension kit for one heat- ing circuit with mixer installed Cylinder loading pump OFF...
  • Page 73 Service scans Scanning operating conditions and sensors (cont.) Operating condition display (sub- Description ject to system equipment level) Actual value - collector sensor 70 °C/°F 263572 Burner hours run Burner starts 030529 001417 Hours run - solar circuit pump 002850 Solar energy in kW/h Displayed in °F if the relevant code has been selected and with the fourth display digit.

  • Page 74: Troubleshooting

    Troubleshooting Calling up fault code history The most recent 10 faults are saved and may be called up. 1. Press G and d simultaneously for approx. 2 seconds. 2. Call up the individual fault codes with a or b. Fault code order Fault code most recent 10th from most...
  • Page 75 Troubleshooting Calling up current fault codes (cont.) Control unit faults 1. Find current fault with c. 2. Select additional fault codes with a and b. 3. Acknowledge fault. The fault can be acknowledged with d. The fault message in the display will be hidden, but red fault indicator A continues to flash.

  • Page 76: Checking And Acknowledging Faults

    Troubleshooting Calling up current fault codes (cont.) 4. E in the display indicates that the burner control unit is locked out. After the fault has been removed, acknowledge by pressing reset E. Fault display design Plain text fault display & Burner control unit &...
  • Page 77 Troubleshooting Checking and acknowledging faults (cont.) Note The fault can be acknowledged with d. The fault message in the dis- play will be hidden, but the red fault indicator U continues to flash. A new fault message will be displayed if an Constant temperature control units acknowledged fault is not removed by the following morning.
  • Page 78 Troubleshooting Checking and acknowledging faults (cont.) Displayed Con- Weat- System Cause Remedy fault code her- character- com- istics Controls System flow Check the low loss without temperature header sensor (see flow tem- sensor lead page 87) perature break sensor (low loss header) Burner Boiler tem-...
  • Page 79 Troubleshooting Checking and acknowledging faults (cont.) Displayed Con- Weat- System Cause Remedy fault code her- character- com- istics No DHW Cylinder tem- Check sensors (see heating perature sen- page 87) sor 2/outlet sensor lead break No DHW Cylinder tem- Check sensors (see heating perature sen- page 87)
  • Page 80 Troubleshooting Checking and acknowledging faults (cont.) Displayed Con- Weat- System Cause Remedy fault code her- character- com- istics Burner Flue gas tem- Check the flue gas blocked perature sen- temperature sensor sor lead break (see page 89) Control Communica- Check connections tion fault –...
  • Page 81 Troubleshooting Checking and acknowledging faults (cont.) Displayed Con- Weat- System Cause Remedy fault code her- character- com- istics Control Communica- Check connections mode tion fault - and coding address solar control unit Control Communica- Check coding mode, tion fault - address 30 set- max.
  • Page 82 Troubleshooting Checking and acknowledging faults (cont.) Displayed Con- Weat- System Cause Remedy fault code her- character- com- istics Control Communica- Replace the LON mode tions fault - communication LON commu- module nication mod- Control Room tem- Check the room mode with- perature sen- temperature sensor out room...
  • Page 83 Troubleshooting Checking and acknowledging faults (cont.) Displayed Con- Weat- System Cause Remedy fault code her- character- com- istics Burner Internal fault Replace control unit blocked Burner in Flue gas tem- Check the heating fault state perature lim- system water level. iter has Vent the heating responded...
  • Page 84 Troubleshooting Checking and acknowledging faults (cont.) Displayed Con- Weat- System Cause Remedy fault code her- character- com- istics Burner in Fuel valve Check gas combi- fault state closes too late nation valve. Check both control paths. Press E. Burner in Fan speed too Check the fan, fault state...

  • Page 85: Repairs

    Troubleshooting Checking and acknowledging faults (cont.) Displayed Con- Weat- System Cause Remedy fault code her- character- com- istics Burner Internal fault Remove EMC inter- blocked ference. If the equipment will not restart, check the boiler coding card and replace, or replace the control unit.
  • Page 86 Troubleshooting Repairs (cont.) 2. Test the resistance of the outside temperature sensor across term- inals X3.1 and X3.2 on the discon- nected plug and compare with the curve. 3. Where actual values strongly devi- ate from the curve values, discon- nect the wires at the sensor and repeat test directly at the sensor.
  • Page 87 Troubleshooting Repairs (cont.) Check the boiler temperature sensor, cylinder temperature sensor or the flow temperature sensor for low loss header 1. Boiler temperature sensor: Pull the leads from boiler temperature sensor A and measure the resis- tance. Cylinder temperature sensor: Pull the plug % from the cable harness on the control unit and measure the resistance.
  • Page 88 Troubleshooting Repairs (cont.) 2. Check the sensor resistance and compare actual values with the curve. 3. Replace the sensor in case of severe deviation. Danger The boiler temperature sen- sor is immersed in the heat- ing water (risk of scalding). Drain the boiler before repla- cing the sensor.
  • Page 89 Troubleshooting Repairs (cont.) 3. Replace the sensor in case of severe deviation. Note Water can leak out when replacing the outlet sensor. Close the cold water shut-off valve. Drain DHW pipe and plate heat exchanger (secondary side). Checking the flue gas temperature sensor The flue gas temperature sensor locks out the boiler when the permissible flue gas temperature is exceeded.
  • Page 90 Troubleshooting Repairs (cont.) 1. Pull the leads from the flue gas temperature sensor A. 2. Check the sensor resistance and compare actual values with the curve. 3. Replace the sensor in case of severe deviation.
  • Page 91 Troubleshooting Repairs (cont.) Checking plate heat exchanger H Heating return L Heating flow K Cold water M DHW 7. Release screws F and pull plate 1. Shut off and drain the boiler on heat exchanger G forward out of the primary and the secondary side.
  • Page 92 Troubleshooting Repairs (cont.) 10. Install in reverse order using new Danger gaskets. Lubricate the new gas- Escaping gas leads to a kets/seals. risk of explosion. Check the gas connections for soundness. Check all fittings and the flange for soundness. Checking the temperature limiter If the burner control unit cannot be reset after a fault shutdown, although the boiler water temperature is below...
  • Page 93 Troubleshooting Repairs (cont.) & Electrical connection & Correct position of the O-rings inside the adaptor & Are the test nipples closed with plugs? Replace the sensor if fault messages persist. 1. Pull off the electrical plug A. Checking O-rings: 2. Remove sensor B by pulling it upwards.
  • Page 94 Troubleshooting Repairs (cont.) Checking the fuse 3. Remove cover A. 1. Switch OFF the mains power. 2. Release the lateral closures and 4. Check fuse F1. pivot the control unit down.
  • Page 95 Troubleshooting Repairs (cont.) Extension kit for heating circuit with mixer Checking the rotational direction of 2. Note the rotational direction of the the mixer motor mixer motor during the self-test. Then set the mixer manually to the "Open" position. Note The flow temperature sensor must now sense a higher temperature.

  • Page 96: Function Description

    Function description Constant temperature control units Heating mode DHW loading with gas fired combi- The set boiler water temperature will nation boilers be maintained in the heating and If the flow switch recognises that DHW operating program G, when a DHW is drawn off (>...
  • Page 97 Function description Constant temperature control units (cont.) A Heating programs F Setting values B Comfort mode G DHW temperature C Information H Emissions test function D Basic settings K Boiler water temperature E Confirmation/acknowledgement...

  • Page 98: Weather-Compensated Control Units

    Function description Weather-compensated control units Heating mode The control unit determines a set boi- DHW loading with a gas fired boiler ler water temperature subject to out- The DHW heating will be activated if side temperature or room temperature the cylinder temperature falls 2.5 K (if a room temperature-dependent below the set cylinder temperature.
  • Page 99 Function description Weather-compensated control units (cont.) A Heating circuit time program H Party mode B DHW time program K Basic settings L Confirmation/acknowledgement and DHW circulation (if connected M Setting values to the control unit) C Holiday program N DHW temperature D Information O Emissions test function E Heating programs...

  • Page 100: Extensions For External Connections (Accessory)

    Function description Extensions for external connections (accessory) Internal extension H1 & The internal extension is integrated Central fault message (code 53:0) & into the control unit housing. As alter- Cylinder loading pump (code 53:3) & native, the following functions can be DHW circulation pump (code 53:1) connected to relay output sK.
  • Page 101 Function description Extensions for external connections (accessory) (cont.) Internal extension H2 & The internal extension is integrated Central fault message (code 53:0) & into the control unit housing. As alter- Cylinder loading pump (code 53:3) & native, the following functions can be DHW circulation pump (code 53:1) connected to relay output sK.

  • Page 102: External Extension H

    Function description Extensions for external connections (accessory) (cont.) External extension H1 & The external extension is connected External blocking to the boiler control unit via the KM (terminals 2 - 3) & BUS. The following functions can be External demand controlled or processed via this exten- (terminals 1 - 2) &...
  • Page 103 Function description Extensions for external connections (accessory) (cont.) External extension H2 & The external extension is connected External blocking to the boiler control unit via the KM (terminals 2 - 3) & BUS. The following functions can be External demand controlled or processed simulta- (terminals 1 - 2) &...

  • Page 104: Control Functions

    Function description Control functions External operating mode changeover The function "External operating mode changeover" is connected via input aVD of the external extension. With coding address 91 you can select, for which heating circuit the changeover of operating mode should apply: Coding Changeover of operating mode affects:...
  • Page 105 Function description Control functions (cont.) External blocking The function "External blocking" is In coding address 32 you can select connected via input aVD of the exter- the influence the signal "Ext. block- nal extension. ing" should have on the connected cir- culation pumps.
  • Page 106 Function description Control functions (cont.) The diverter valve can be moved into its central position via coding address 2F:2. The system can be filled com- pletely, if the control unit is switched OFF in this position. Filling with the control unit switched ON If the system is to be filled with the control unit switched ON, the diverter valve is moved into its central position...
  • Page 107 Function description Control functions (cont.) Temperature profile: Diagram 2 code F1:2 Temperature profile: Diagram 3 code F1:3 Temperature profile: Diagram 4 code F1:4...
  • Page 108 Function description Control functions (cont.) Temperature profile: Diagram 5 code F1:5 Temperature profile: Factory-set code F1:6 to F1:15...

  • Page 109: Designs

    Designs Connection and wiring diagrams – internal connections Main PCB DHW outlet sensor § Boiler temperature sensor...
  • Page 110 Designs Connection and wiring diagrams – internal connectio . . . (cont.) dÖ Cylinder temperature sensor Step motor for diverter valve (gas fired boiler) Temperature limiter Comfort sensor (gas combina- Ignition unit a-Ö Fan motor tion boiler) aVL Flow switch (plug on the cable harness) aNF Differential pressure sensor Ionisation electrode...

  • Page 111: Connection And Wiring Diagrams - External Connections

    Designs Connection and wiring diagrams – external connections Main PCB Mains supply unit...
  • Page 112 Designs Connection and wiring diagrams – external connectio . . . (cont.) Optolink Cylinder temperature sensor sÖ Burner control unit Internal circulation pump User interface Gas solenoid valve fÖ Coding card Power supply Connection adaptor Mains power supply - acces- LON communication module sories and Vitotrol 100 a-Ö...

  • Page 113: Parts Lists

    Parts lists Parts lists Spare parts information Quote the type and serial no. (see type plate) and the item no. of the required part (as per this parts list). Obtain standard parts from your local supplier. 001 Quick-acting air vent valve 034 Return pipe 002 Connecting pipe 035 Ventilation air gasket...

  • Page 114: Type Plate

    Parts lists Parts lists (cont.) 095 Locking clips (10 pieces) 098 Cable harness 100/35/34 (aux- 110 Outside temperature sensor iliary earth) 099 Step motor connecting cable Wearing parts 100 Cable harness ionisation/KM 050 Burner gasket BUS (internal) 053 Ignition electrode with gasket 101 Internal ionisation lead 054 Ionisation electrode with gasket 104 Adaptor - ionisation current test...
  • Page 115 Parts lists Parts lists (cont.)
  • Page 116 Parts lists Parts lists (cont.)
  • Page 117 Parts lists Parts lists (cont.)
  • Page 118 Parts lists Parts lists (cont.)
  • Page 119 Parts lists Parts lists (cont.)

  • Page 120: Commissioning/Service Reports

    Commissioning/service reports Commissioning/service reports Setting and test values Set value Initial start-up Date: Static pressure mbar max. 57.5 mbar Supply pressure (flow pressure) = for natural gas E mbar 17.4 to 57.5 mbar = for natural gas LL mbar 17.4 to 57.5 mbar = for LPG mbar...
  • Page 121 Commissioning/service reports Commissioning/service reports (cont.) Maintenance/ser- Maintenance/ Maintenance/ Maintenance/ser- vice service service vice...
  • Page 122 Commissioning/service reports Commissioning/service reports (cont.) Setting and test values Set value Maintenance/ service Date: Static pressure mbar max. 57.5 mbar Supply pressure (flow pressure) = for natural gas E mbar 17.4 to 57.5 mbar = for natural gas LL mbar 17.4 to 57.5 mbar = for LPG...
  • Page 123 Commissioning/service reports Commissioning/service reports (cont.) Maintenance/ser- Maintenance/ Maintenance/ Maintenance/ser- vice service service vice...
  • Page 124 Commissioning/service reports Commissioning/service reports (cont.) Setting and test values Set value Maintenance/ service Date: Static pressure mbar max. 57.5 mbar Supply pressure (flow pressure) = for natural gas E mbar 17.4 to 57.5 mbar = for natural gas LL mbar 17.4 to 57.5 mbar = for LPG...
  • Page 125 Commissioning/service reports Commissioning/service reports (cont.) Maintenance/ser- Maintenance/ Maintenance/ Maintenance/ser- vice service service vice...

  • Page 126: Specification

    Specification Specification Rated voltage: 230 V~ Electronic tempera- Rated frequency: 50 Hz ture limiter setting: 82 °C (fixed) Rated current : 6.0 A~ Temperature limiter Safety class: setting: 100 °C (fixed) IP X 4 D to Mains fuse: max. 16 A Protection level: EN 60529 Power consumption...

  • Page 127: Certificates

    Certificates Declaration of conformity Declaration of conformity for Vitodens 300 We, Viessmann Werke GmbH & Co KG, D-35107 Allendorf, declare as sole responsible body, that the product Vitodens 300 conforms to the following stan- This product is designated in accor-...

  • Page 128: Manufacturer's Certificate According To The 1St Bimschv [Germany]

    Certificates Manufacturer's certificate according to the 1st BImSchV [Germany] We, Viessmann Werke GmbH & Co KG, D-35107 Allendorf, confirm that the fol- lowing product meets the NO limits specified by 1st BImSchV Paragraph 7 (2) [Germany]: Vitodens 300 Allendorf, 14.01.04 Viessmann Werk GmbH&Co KG...

  • Page 129: Keyword Index

    Keyword index Keyword index Adjusting the room temperature Fault history ........Fault messages 74, 76 .
  • Page 130 Keyword index Keyword index (cont.) Parts list Temperature limiter ........&...
  • Page 132 7176 537 3 00001 7176 538 3 00001 8.7 to 35 kW from serial no. 7176 539 3 00001 Viessmann Limited Hortonwood 30, Telford, TF1 7YP, GB Telephone: +44 1952 675000 Fax: +44 1952 675040 www.viessmann.co.uk...

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