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Author Topic: clearances from a external instantaneous water heater  (Read 40918 times)

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Offline robbo

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Re: clearances from a external instantaneous water heater
« Reply #15 on: September 13, 2012, 09:04:33 PM »
hi guys, the way i read it ,it says and shows in diagram"direction of discharge" and also indicates measuement of radius. If you see the note referring to 2.5.1.2(f) it says:- "Positioning to minimize the possibility of ignition of any discharge from a breather vent, so in the case of 2.5.4.9 (c) that is what you follow,cheers   
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Offline bowtieboy

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Re: clearances from a external instantaneous water heater
« Reply #16 on: September 14, 2012, 07:44:45 AM »
yes true Robbo, so what would you consider the clearance to be then?..... the other thing i would like to ask is who is the one person/organisation that a gas fitter can go to to get this issue clearly definded?
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Offline robbo

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Re: clearances from a external instantaneous water heater
« Reply #17 on: September 14, 2012, 08:36:44 AM »
hi guys,(yes true Robbo, so what would you consider the clearance to be then?) the way the reg reads i guess it could be anything!
 Trade practices are passed down from Tradesman to Apprentice apart from classroom learned theory. We do some things a certain way and know them to be right without always knowing the exact regulation wording or the technical reason for it. This may be one of those areas where the regulation is not fully understood but the practice is correct,cheers
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Offline Jaxcat

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Re: clearances from a external instantaneous water heater
« Reply #18 on: September 14, 2012, 11:29:14 AM »
The PGDB have the final say I guess.  The owner of the GMS can define the hazardous area around their unit - but good luck on trying to get them to committ to that in writing. 

It is covered off pretty well in 5261 - it's just that the interpretation of various gasfitters differs - it would be interesting to see what trainees are being taught at tech about this and in their distance learning.

You can also check with someone like Arie de Kort who does a lot of the COC Level 2A training for mains and services and see what he teaches in his course (which incidently is  very good course).

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Offline 07442

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Re: clearances from a external instantaneous water heater
« Reply #19 on: September 14, 2012, 08:40:27 PM »
The owner of my company is calling it BS.
His name is inside the front page of 5261.
My manager is also calling it BS, but I'm not so convinced.
Their argument.. Its not a mechanical inlet to a building. It a fan forced external appliance.
So.....?...
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Offline Thunderhead

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Re: clearances from a external instantaneous water heater
« Reply #20 on: September 15, 2012, 03:31:51 AM »
With the operation of the fan, products of combustion are being forced out and clean air is being induced i think there is clear argument that this is a mechanical inlet.
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Offline robbo

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Re: clearances from a external instantaneous water heater
« Reply #21 on: September 15, 2012, 09:16:46 AM »
hi guys, if the vent on the regulator operates to expell gas because of a reg fault there will not be enough gas pressure to operate the water heater,cheers
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Offline bowtieboy

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Re: clearances from a external instantaneous water heater
« Reply #22 on: September 16, 2012, 03:46:01 PM »
hi guys, well some very good comments :D. i would sugest you all tell any one and everyone you know that its 3 meters and be prepared that the board is looking for installations like mine!, this clearance will included ALL fan forced appilances including energy savers, radiator boilers like the immergas etc all that "have mecanicial air intakes".
i just cant believe this has never come up before now.
 :(
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Offline robbo

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Re: clearances from a external instantaneous water heater
« Reply #23 on: September 16, 2012, 09:20:55 PM »
hi guys/bowtieboy, yes 3mtrs it is if possible or otherwise follow the code:-2.5.4.9/2.5.1.2(f), thats my answer,cheers
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Offline bowtieboy

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Re: clearances from a external instantaneous water heater
« Reply #24 on: September 20, 2012, 08:02:37 AM »
here is a curve ball for you all to think about and i think i will ask pgdb this....

if the pgdb say a rinnai infinity external water heater is an "mechanical air intake" then it must have its flue teminal 1m away! that makes ALL instandaneous water heaters on the market non conpliant! as per nzs5261 table 16 ref k.

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Offline robbo

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Re: clearances from a external instantaneous water heater
« Reply #25 on: September 20, 2012, 08:52:33 AM »
hyi guys, i would say that the designers and engineering team at Rinnai would have no problem dismissing views submitted by the combine brains of the board,cheers
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Offline bowtieboy

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Re: clearances from a external instantaneous water heater
« Reply #26 on: September 20, 2012, 07:00:42 PM »
i wish Robbo...i have a meeting with mr pgdb tomorrow, he is in my town and wants to audit another one of my jobs!!! hmmmm.
i am now wondering why i am getting audited again??? two months since the last one??
watch this space!! >:(
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Offline Jaxcat

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Re: clearances from a external instantaneous water heater
« Reply #27 on: September 20, 2012, 09:50:12 PM »
Bowtie - you have a right to know why you are being audited - if it is a competency audit then there are rules around how they must conduct themselves with you.  Just who is it that is auditing you.  Be thoughtful about what information you give them and decline to answer if you feel they are trying to trap you.  You could also take someone with you as a witness if you felt it necessary. 

If they are doing a competency audit then I thought they needed to advise you in writing about why etc.   If they have not given sufficient notice then you can decline to meet them.  You have every right to know WHY they are auditing you - has their been a complaint?  Be careful - be professional, but also err on the side of silence.  If they have questions for you ask them to submit them to you in writing so you can consider what they are asking and how you will answer.  Say that you may want to take it all under advisement.
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Offline robbo

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Re: clearances from a external instantaneous water heater
« Reply #28 on: September 20, 2012, 10:44:23 PM »
hi guys,/Bowtieboy, good advice from Jax play it cool be vague if not sure don`t incriminate yourself, you should know which job is to be audited so you can organise entry to the property, go early to talk with client, make sure they do not have a problem if they do fix it before the audit takes place,good luck and keep us informed,cheers
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Offline Thunderhead

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Re: clearances from a external instantaneous water heater
« Reply #29 on: September 22, 2012, 01:38:52 AM »
soon its going to get to such a state that you will have to take along your lawyer with you and revise every question through him!.
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