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Discuss Glowworm 100ff confirm my ideas please in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. Rob Foster

    Rob Foster Top Contributor!!

    Glowworm 100ff wall hung 30kw conventional boiler. Set up in garage with correct 28mm runs to rest of system. All worked well over the years odd new bits and bobs. Recently serviced It goes through start up sequence fine style.
    Call on from timer in house, fan starts, pump on, starts ignition sequence spark ignites pilot gas - pilot established and bingo ....28mm out starts to heat up but after about 10 mins ------------------------- shut down. Cool down and will do it all again. All rads (12 rads) are open and 3 way for cylinder is always open. Rads start to heat up. So whats the problem ? I think maybe pump is lala despite being new 3 years ago and runs smoothly. No airlocks centralheating water out of bleeds on all 3 levels of the gaff. The only control for heat is on the boiler and set at 3/4 full heat. Any ideas. It does not get to modulation in 10 mins - house is too big
    Thanks in anticipation
     
  2. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Start by making sure the pump is spinning mate. Take the centre out and see if you can stop it with a screw driver.
     
    • Like Like x 1
  3. Last Plumber

    Last Plumber Plumber GSR

    What are the flow and return temperatures over the ten minute period?
     
  4. Rob Foster

    Rob Foster Top Contributor!!

    gt no accurate temps but I can touch the rtn for ever but the flow gets hot quicktime. Thank you for responding
     
  5. bogrodder

    bogrodder GSR

    What make n model of pump is it rob?
     
  6. Rob Foster

    Rob Foster Top Contributor!!

    Grunfos selectric set on speed 2 which I am pretty sure was brand new when fitted not one from out of one of the vans !
     
  7. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Could be 6 months old, but if you system water is c**p it makes no difference
     
  8. Rob Foster

    Rob Foster Top Contributor!!

    I have had the best magnet cleaner installed for the last 6 years - it was designed by me and produced by Eclipse Magnetics in Sheffield.
     
  9. Rob Foster

    Rob Foster Top Contributor!!

    some of the pre production units still in my workshop like the one installed on my system - cant recall what the commercial name for the eclipse unit is called nowadays

    GEDC0921.JPG
     
  10. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Nothing like blowing ones own trumpet, A Rob?:D:D:D:p
     
    • Funny Funny x 3
  11. Rob Foster

    Rob Foster Top Contributor!!

    I have designed a couple of things that worked but did not work commercially and lost some lolly and time. We did have a forey into pot hole fixing machines but the cost and competative big boys blew us out. We had some fun tho. Somebody from Dublin tried to produce a system to dilute water - he is still at it !!!!.
     
  12. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    No worries mate. Just busting your b***s a little. But just so you know. Just because you have a filter fitted, doesn’t mean your water in the system will not be bad. A filter is only as good as the person who powerflushed your system.
     
  13. Rob Foster

    Rob Foster Top Contributor!!

    I flushed the system ! each year
     
  14. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    I would still test the pump
    First mate.
     
    • Like Like x 1
  15. Rob Foster

    Rob Foster Top Contributor!!

    on my way upstairs now thanks i will report back
     
    • Like Like x 1
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