Viessmann B2TB, Installation And Service Instructions For Contractors

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Commissioning steps
Inspection steps
Maintenance steps Page
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1. Removing the front panels ................................................................................................ 29
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2. Filling the heating system ................................................................................................. 29
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3. Filling the DHW cylinder on the DHW side ...................................................................... 30
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4. Venting the boiler ............................................................................................................... 31
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5. Filling the trap with water .................................................................................................. 31
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6. Venting the heating system ............................................................................................... 32
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7. Commissioning the system ............................................................................................... 33
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8. Checking all connections on the heating water and DHW sides for leaks
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9. Designating heating circuits – only for weather-compensated control units .............. 35
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10. Checking the gas type ....................................................................................................... 35
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11. Gas type conversion (only for operation with LPG) ....................................................... 36
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12. Checking the static pressure and supply pressure ........................................................ 36
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13. Function sequence and possible faults ........................................................................... 38
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14. Setting the max. heating output ........................................................................................ 39
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15. Activating screed drying ................................................................................................... 39
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16. Tightness test on balanced flue system (annular gap check) ....................................... 40
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17. Removing the burner ......................................................................................................... 41
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18. Checking the burner gasket and burner gauze assembly .............................................. 41
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19. Checking and adjusting the ignition and ionisation electrodes .................................... 43
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20. Cleaning the heating surfaces .......................................................................................... 43
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21. Checking the condensate drain and cleaning the trap ................................................... 43
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22. Installing the burner ........................................................................................................... 45
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23. Checking the neutralising system (if installed)
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24. Checking the anode connection and anode earth current with an anode tester ......... 45
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25. Draining the boiler on the DHW side ................................................................................ 46
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26. Cleaning the loading cylinder ........................................................................................... 47
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27. Checking and replacing the magnesium anode (if required) ......................................... 47
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28. Re-assembling and filling the loading cylinder ............................................................... 48
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29. Checking the expansion vessel and system pressure ................................................... 48
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30. Checking the pre-charge pressure and the DHW expansion vessel (if installed) ........ 49
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31. Checking the safety valve function
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32. Checking the firm seating of electrical connections
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33. Checking all gas equipment for tightness at operating pressure ................................. 50
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34. Checking the combustion quality ..................................................................................... 50
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35. Checking the flue system for unrestricted flow and tightness
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36. Matching the control unit to the heating system ............................................................ 51
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37. Adjusting heating curves .................................................................................................. 51
38. Connecting the control unit to the WLAN network ......................................................... 53
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39. Connecting the control unit to the LON ........................................................................... 53
Commissioning, inspection, maintenance
Steps - commissioning, inspection and maintenance
5789 302 GB