Myson Velaire Vitesse : Boiler firing problems

Discussion in 'Plumbing and Central Heating' started by nike, 6 Nov 2006.

  1. nike

    nike

    Joined:
    6 Nov 2006
    Messages:
    4
    Thanks Received:
    0
    Location:
    Norwich
    Country:
    United Kingdom
    Hi all,

    I could do with some help please. This boiler has been a useless piece of kit and constantly troublesomble from the day it was installed. However, many years on, it's still in place but hasn't been used for the last 2 years. After firing it up, the fan started up and after ignition you can hear a very unstable flame then after a few minutes shuts off with the reset button glowing. This happened a couple of times and now the fan starts but no flame/ignition can be heard. Oil is present at pump inlet and flowing freely. I have checked the pump filter and it looks clean. I am guessing a problem with the oil pump but could do with some expert opinions. Solenoid? PhotoCell? Can the pump be dismantled and cleaned?

    Burner is Electro Oil B9
    Oil Pump: Danfoss BFP41

    Any help would be most appreciated.
     
  2. Sponsored Links
  3. sime10

    sime10

    Joined:
    19 Oct 2006
    Messages:
    792
    Thanks Received:
    6
    Location:
    Cardiff
    Country:
    United Kingdom
    Oilman won't be long he will answer
     
  4. nike

    nike

    Joined:
    6 Nov 2006
    Messages:
    4
    Thanks Received:
    0
    Location:
    Norwich
    Country:
    United Kingdom
    Many thanks
     
  5. outinthestix

    outinthestix

    Joined:
    25 Nov 2005
    Messages:
    210
    Thanks Received:
    11
    Location:
    Staffordshire
    Country:
    United Kingdom
    Don't dismantle the pump. It won't go back together properly.You can check if the pump coupling is ok .
    When did you last get a full service on the boiler by an experienced oil technician ? He/she will have the specialised equipment and knowledge to set the burner up and to identify problem components.
     
  6. nike

    nike

    Joined:
    6 Nov 2006
    Messages:
    4
    Thanks Received:
    0
    Location:
    Norwich
    Country:
    United Kingdom
    Well that's the problem :) Two different engineers looked at it a couple of years ago due to it having various problems (not dis-similar to what's happening now). It worked for a couple of months then packed up on both occassions after having most parts replaced. It's my elderly parents and they got so fed up with it that they decided to buy electric oil heaters and not to use it! They now won't let me get anyone else in to have a look!!! I'm an engineer by trade (not heating) so thought I would have a go.
     
  7. Sponsored Links
  8. oilman

    oilman

    Joined:
    16 Sep 2003
    Messages:
    7,978
    Thanks Received:
    31
    Country:
    United Kingdom
    You'll need to check the pump pressure is around 100psi min.
    Look up the Danfoss site for pump info.
    Then you need to fit a new nozzle of the same size, but use an EH or equivalent. It gives a hollow spray pattern. They are too cheap to mess around investigating whether they are ok or not.
    Check the capacitor value is within 5% of its value. Measure it don't read the case. Unplug the solenoid coil lead.
    Take the burner out, and sit it so you can see the business end. Apply power briefly and check the spark looks healthy. Make sure you're healthy, and can run fast if necessary.
    Once it's running, you need to check the CO2 level. These burners can be a pain, and need a high CO2 to ensure stability.
     
  9. nike

    nike

    Joined:
    6 Nov 2006
    Messages:
    4
    Thanks Received:
    0
    Location:
    Norwich
    Country:
    United Kingdom
    Many many thanks Oilman. I will have a go tomorrow and report back! I am guessing that after sitting unused for so long, the nozzle could have become blocked? I will source a new one in the morning.
     
  10. outinthestix

    outinthestix

    Joined:
    25 Nov 2005
    Messages:
    210
    Thanks Received:
    11
    Location:
    Staffordshire
    Country:
    United Kingdom
    How are you checking the capacitor value oilman ? Do you mean the uf value or something else, and what instrument are you using ?
     
  11. oilman

    oilman

    Joined:
    16 Sep 2003
    Messages:
    7,978
    Thanks Received:
    31
    Country:
    United Kingdom
    I mean uF, what else is there? I use a capacitance meter.
     
  12. oilman

    oilman

    Joined:
    16 Sep 2003
    Messages:
    7,978
    Thanks Received:
    31
    Country:
    United Kingdom
    Nozzle wont necessarily be blocked, but thinking is too expensive.
     
  13. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page