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conventional

A convention is a set of agreed, stipulated, or generally accepted standards, norms, social norms, or criteria, often taking the form of a custom.
In a social context, a convention may retain the character of an "unwritten law" of custom (for example, the manner in which people greet each other, such as by shaking each other's hands). Certain types of rules or customs may become law and sometimes they may be further codified to formalize or enforce the convention (for example, laws that define on which side of the road vehicles must be driven).
In physical sciences, numerical values (such as constants, quantities, or scales of measurement) are called conventional if they do not represent a measured property of nature, but originate in a convention, for example an average of many measurements, agreed between the scientists working with these values.

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  1. D

    Worcester 40 CDI conventional Boiler

    Hi Guys, I got called to look at the above boiler last week because the boiler would not stay ignited. The Flame kept fluctuating then eventually went to lockout. I phoned Worcester technical and tested evrything as they said but still couldnt find anything to fix it. In the end the customer...
  2. D

    worcester 29HE conventional E9 fault

    Hi got called out tonight to the above fault, The boiler wont fire, the fan runs it goes through ingition then stops and E9 comes up, the systems been like this for 2 weeks so cold. Ive checked head pressure is fine, pump works, checked fuse on pcb, im thinking the flow temp sensor needs...
  3. C

    Conventional flue combi boilers?

    Can you get them? A customer wants to replace an old floor-standing Ideal Mexico boiler that's in a hallway cupboard and change over to a combi system. It's a flat with concrete floors, so moving the boiler location to an outside wall is going to be an expensive job.
  4. M

    Conventional Gas Boiler firing all the time.

    I have a old Olympic / Thorn EMI conventional gas boiler that has been working ok but over the last few months I have noticed that it fires very frequently, as often as once every 10 - 15 minutes, all day and night, when it shouldn't be doing anything (i.e. central heating / hot water timer is...
    • markyb2
    • Thread
    • boiler button color conventional could firing gas gas boiler oil thorn time
    • Replies: 9
    • Forum: Plumbing Jobs | The Job-board
  5. D

    cp 12

    you have three flue categorys, flueless.open-flued, room sealed....so on a cp 12 what is c f refering too.
  6. M

    worcester 30cdi conventional

    Brand new in box worcester 30cdi conventional boiler and vertical flue. About 1k`s worth. £700 no offers. You are welcome to send a courier or we are based in Dudley, West Midlands. [email protected]
  7. A

    worc 40 cdi conventional

    hi again went out to a 40cdi conventional other day boiler fires goes to full then after rads warm up goes to low temp then stops i called worc tech (brill people ) went through routine they diagnosed a pcb problem great fitted new pcb still the same any help cust not happy
  8. A

    Pressure loss in Worcester Greenstar 40CDI Conventional Boiler

    Hi I have a Worcester Greenstar 40CDI Conventional boiler. The boiler and CH system is just under 2 years old and never caused an issue but has suddenly become prone to pressure loss . A recent radiator removal and draining of system was taken 2 weeks ago with no problems up until 2 days ago. We...
    • approach
    • Thread
    • boiler calibri color conventional greenstar oil pressure pressure loss water worcester
    • Replies: 8
    • Forum: Plumbing Jobs | The Job-board
  9. H

    18kw System Boiler to Replace Conventional Boiler

    What work would be involved in adapting my open vent system to put a system boiler in?I have been advised to do this as most heat only boilers are not much good. I am not replacing the existing cylinder What boiler would you recommend?
    • higgins79
    • Thread
    • boiler conventional fully oil recommend replace system system boiler
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  10. B

    Worcester bosch 30 kw heat only boiler ( conventional ) wiring issue.

    dear all, i am going to install a worcester conventional boiler, everything looks fine except for the wiring, from the old boiler, i have, Perm L, N, E, Pump L and Pump N, but the worcester boiler has: 1. Main L 2. Main N, 3. E 4. Ls 5. Lr, 6, Ns, i dont know connect which to which really...
  11. J

    Best 40kw Conventional boiler

    Can anyone recommend a good 40kw open vent boiler wall or floor it going in a cellar Cheers Jon
  12. V

    Is it possible to use propane/butane on conventional ovens?

    I found a place that was selling a second hand oven for dirt cheap and am thinking about using it in the garage for larger roasts. Does anyone know these ovens can be connected to bottled gas tanks? If so would you use propane or butane? Thanks
  13. R

    Worcester bosch 30 kw heat only boiler ( conventional ) wiring issue.

    Ok I have a honeywell smartfit s plan ( 2 x 2 portvales, cylinderstat,pump,programmer ) installed from the previous install as I am only changing the boiler. I need to connect the smartfit to the the new wb boiler . I have a live neutral and earth coming from the smarfit wiring center to...
    • richardd
    • Thread
    • boiler bosch conventional heat heat only issue oil wiring worcester worcester bosch
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  14. G

    Hot water feed problem - conventional system

    Hi there, first post to the forum, and I was hoping for some help before calling in a plumber. I have a convential system where I have a main cold tank in the loft which feeds : The electric shower in bathroom (which is working fine) The cold water supply in upstairs bathroom, The hot water...
    • gideononline
    • Thread
    • conventional cylinder hot hot water problem running system valve water where
    • Replies: 10
    • Forum: Plumbing Jobs | The Job-board
  15. R

    Arrgh combi, conventional, water heater on 1 bar single mains over two flats...phew

    Hi, I recently bought a house which is split into two self contained flats. The first floor flat has a hot water heating system and a separate boiler for heating. Ive been told this system is very old and probably wont cope with increased modern day demands on water requirements from...
    • ripsoco
    • Thread
    • bar combi conventional floor heater mains shower single water water heater
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  16. W

    Problem with hot water pressure - Conventional Boiler?

    I live in a top floor flat with two bathrooms and what I think is a conventional boiler (large tank in the airing cupboard, feeder tank above it, but with a small British Gas unit in the kitchen (if fires up when the hot water/heating is turned on). We moved in in August 2010 and the hot water...
    • wilkinson_rober
    • Thread
    • boiler conventional hot hot water hot water pressure oil pressure problem water water pressure
    • Replies: 3
    • Forum: Plumbing Jobs | The Job-board
  17. M

    Boiler making a firing up noise then off again..on again... off again..

    Hi there, if anyone can help me I would be extremely grateful. My boiler is doing a strange thing, it is sounding like it is firing up, and then it goes off again, on again, consistently. Have no idea what to do, if anyone can advise me that would be wonderful. Thanks
    • miss.cosmo
    • Thread
    • again boiler conventional firing flue heater hot hot water making noise oil pipe water
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  18. W

    Cool rads

    Hello , I have a Potterton profile conventional boiler . If I put the boiler stat above 4 it trips out . The rads are not getting very warm . What should I do ? any ideas ? Thanks Wooly
  19. H

    Spillage detector issue

    We have a regularly-serviced Potterton Prima 60C boiler, about 12 years old, which is repeatedly tripping the spillage detector. Our service fellow is due to take a look at it in a day or two, but I'd like to understand for myself where the problem might lie. Some relevant (I think) points...
    • harveyvan
    • Thread
    • air boiler button cold cold weather conventional flu flue gas install issue potterton pressure problem reset sealed testing
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  20. I

    Conventional boiler : Hot Water & Cold Rads

    I hope one of you could help me again. For some reason my Radiators are 'warm - hot'. I have bled them (which helped). I understand there could be lots of answers but I am after advice on how I can find the problem. On the boiler downstairs there is a little dial with numbers 1 to 6. This...
    • icemancomeths
    • Thread
    • bleed boiler central heating system cold cold radiator cold rads conventional cylinder drain gas hot hot rads hot water magnaclean oil pressure problem radiators remove school sludge tank tf1 wall water
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
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