Supplementary Bonding on a boiler

[telectrix]

this eaga. same company that installed our new boiler. when it froze in the cold weather it took them 7 weeks to come out and fix it. their emergency call service is nothing short of a joke. placed on hold for 5 hours, when the phone battery died.

 

[Deleted member 9648]

If you check the manufacturers instructions that come with most oil boilers carefully, you will find that they instruct to cross bond the pipes at the boiler.
Example:
http://www.worcester-bosch.co.uk/ca...nstructions-for-greenstar-danesmoor-18-25.pdf
Page 7 of the book, Page 9 of the pdf

My understanding is that gas boilers are designed to British Standards which require that the boiler design guarantees electrical continuity of pipes at the manifold, thus negating the need for any cross bonding. The standards oil boilers are designed to makes no such requirement.

Thanks for the link...the point is though where does it say pipes must be electrically continuous?...and why must they be electrically continuous?...why then are plastic tanks allowed to be installed breaking the 'essential electrical continuity'?.Clearly the manufacturers of these appliances dont understand the requirements....(see post 28)

 

[liam b]

this eaga. same company that installed our new boiler. when it froze in the cold weather it took them 7 weeks to come out and fix it. their emergency call service is nothing short of a joke. placed on hold for 5 hours, when the phone battery died.

there must be 3000 boilers going in a week and i imagine alot of them had problems this winter, to take on people to cover that would have cost alot of money. then all the funding would be gone for all the old biddies that need new boilers...

 

[sparky3366]

I got a fail today because the gas wasn't bonded within 600mm of the meter, there wasnt a cat in hells chance of getting it closer than 2.5m. Concrete floors, terraced house and db under the stairs, which were a half landing stairs and no access to met.well gutted...

 

[telectrix]

there must be 3000 boilers going in a week and i imagine alot of them had problems this winter, to take on people to cover that would have cost alot of money. then all the funding would be gone for all the old biddies that need new boilers...

so why install a boiler that can't cope with normal british climate ( i.e. cold in winter) and only works when you don't need it.

 

[telectrix]

I got a fail today because the gas wasn't bonded within 600mm of the meter, there wasnt a cat in hells chance of getting it closer than 2.5m. Concrete floors, terraced house and db under the stairs, which were a half landing stairs and no access to met.well gutted...

so what happened to the reg. stating within 600mm or as close as practicable?

 

[liam b]

if the boiler is in a garage or loft it will have frost stats, was it not the condensate or something that froze, not the boiler

 

[sparky3366]

its down to the surveyor, if the boiler is in a garage/outbuilding, there should be a frost stat...but they dont always specify them

 

[sparky3366]

Doh!...

 

[telectrix]

it was the condensate pipe. it had been installed incorrectly so that the flow outside was horizontal. no lagging, i fixed it myself temporarily by ripping out the condensate pipe and putting a bucket under the boiler. it was so bad that the plastic pipe had shattered with the cold. the frost stat probably told the boiler to fire up, but as the conny pipe was froze, no go. 2 burst pipes in garage. all my certs and paperwork, pc, printer, all ruined by flood.

 

[MarkieSparkie]

The confusion on this issue is due to a conflict between the Electrical Regs and the Gas Regs. Electrical Regs don't require supplementary (cross) bonding of boiler pipework, as stated by IQ and others. The Gas Regs however, state supplementary bonding of boiler pipework is required.
There is also another area of conflict you will come across BS 6891:2005, Installation of low pressure gas pipe work in domestic premises, clause 8.16.2 states that "Gas insallation pipes must be spaced: a) at least 150mm away from electricity meters, controls, electrical switches or sockets, distribution boards or consumer units; b) at least 25mm away from electricity cables." (OSG 2.3 refers) However, the Gas Regs say at least 25mm away from all electrical cables and fittings. So now you know why the the gas fitter always put his pipes close to your electrical accessories.

 

[Risteard]

Whilst I agree that manufacturers' instructions have to be adhered with in order to achieve compliance with BS 7671:2008, given that there is no such thing as "cross bonding" I'm not sure how that instruction could possibly be carried out.

 

[brucelee]

it was the condensate pipe. it had been installed incorrectly so that the flow outside was horizontal. no lagging, i fixed it myself temporarily by ripping out the condensate pipe and putting a bucket under the boiler. it was so bad that the plastic pipe had shattered with the cold. the frost stat probably told the boiler to fire up, but as the conny pipe was froze, no go. 2 burst pipes in garage. all my certs and paperwork, pc, printer, all ruined by flood.

Hi telectrix this happened to me and loads who have just had new combi or condesing boliers
in the end git sick of trying to melt it every day why it was cold i would go outside give the pipe a good whack or pull the top piece form the bottom and all the ice came out lol all winter hehe
prefered the old boiler