PAT testing a Ariston Andris under sink water heater

punkin · May 4, 2023

Hi All

I’ve come across this heater Ariston Andris Lux Undersink Water Heater 2kW 10Ltr - Screwfix - https://www.screwfix.com/p/ariston-andris-lux-undersink-water-heater-2kw-10ltr/3248g
Its a plugin & I’m trying to PAT test it.
It doesn’t say which class its is under (1 or 2) I would assume it’s a class 1 but when I try the Earth continuity to the pipes going in and out, I get a fail, no continuity to earth whatsoever
Does anyone know if its Class 1 or 2?

Thanks
Pete

snowhead · May 4, 2023

Ariston undersink water heaters (usually / should) have these fitted at the inlet and outlet.

DPG · May 4, 2023

The manual I just found on the Internet shows a requirement for a 3 core supply cable and an earth connection when installing it. Not 100% sure it was exactly the same version though. If the device doesn't have the class II logo on the spec plate then it will not be double insulated and so will be class I.

Avo Mk8 · May 4, 2023

As per DPG, I found by accident an installation manual for the South African model (the wording of the instructions being very similar to the European one except for standards) which has a diagram showing the earth being connected to the metalwork of the immersion heater mounting bracket Inside the unit.
It would seem that to test earth continuity you would have to take the cover off!

[ElectriciansForums.net] PAT testing a Ariston Andris under sink water heater

mainline · May 4, 2023

punkin said:
Hi All

I’ve come across this heater Ariston Andris Lux Undersink Water Heater 2kW 10Ltr - Screwfix - https://www.screwfix.com/p/ariston-andris-lux-undersink-water-heater-2kw-10ltr/3248g
Its a plugin & I’m trying to PAT test it.
It doesn’t say which class its is under (1 or 2) I would assume it’s a class 1 but when I try the Earth continuity to the pipes going in and out, I get a fail, no continuity to earth whatsoever
Does anyone know if its Class 1 or 2?

Thanks
Pete

No bonding to the I assume copper water pipes ?

Avo Mk8 · May 4, 2023

mainline said:
No bonding to the I assume copper water pipes ?

The instructions require you to install the isolating plumbing fittings (post #2) to avoid electrolytic corrosion of the unit!

But yes, I agree, if the pipes are copper and bonded and the unit is connected up you would expect the earth continuity. But that's not a PAT, sorry ITSEE, test!

Rockingit · May 4, 2023

I'm surprised no-one has yet asked the obvious question..... why are you trying to test a non-portable device with a PAT test?

DPG · May 4, 2023

Rockingit said:
I'm surprised no-one has yet asked the obvious question..... why are you trying to test a non-portable device with a PAT test?

Don't forget it's ISITEE, not PAT. It can apply to non portable items as well. And often doesn't involve actual testing. The term PAT is very misleading.

Rockingit · May 4, 2023

DPG said:
Don't forget it's ISITEE, not PAT. It can apply to non portable items as well. And often doesn't involve actual testing. The term PAT is very misleading.

True - however - that's not what the OP stated.

loz2754 · May 4, 2023

PAT testing is no longer a recognised term.
The Code of Practice edition 5 removed all traces of the term.
And that's for precisely the reason raised by @Rockingit, that is, to remove any confusion between what equipment should be tested and/or inspected. ISITEE applies to ALL electrical equipment whether portable or not.

mainline · May 4, 2023

Anyone testing equipment for safe use, should also be competent enough to be able to ensure that the supply is also safe.

punkin · May 4, 2023

snowhead said:
Ariston undersink water heaters (usually / should) have these fitted at the inlet and outlet.

Yes I would have thought so but the fittings on this are slightly corroded. So I would assume the outlet would be insulated like in a shower. I will have to open the thing I reckon for a closer look.

punkin · May 4, 2023

Avo Mk8 said:
As per DPG, I found by accident an installation manual for the South African model (the wording of the instructions being very similar to the European one except for standards) which has a diagram showing the earth being connected to the metalwork of the immersion heater mounting bracket Inside the unit.
It would seem that to test earth continuity you would have to take the cover off!

View attachment 107896

Yep I think I would agree with you, bugger, as you can imagine, I need to disconnect the pipes under the sink and I'm not as flexible as I used to be.

punkin · May 4, 2023

mainline said:
No bonding to the I assume copper water pipes ?

Copper then flexi Stainless pipes.

punkin · May 4, 2023

Rockingit said:
I'm surprised no-one has yet asked the obvious question..... why are you trying to test a non-portable device with a PAT test?

Its

Rockingit said:
True - however - that's not what the OP stated.

ISITEE and PAT testing are the same, they are moving away from the word PAT testing as it confuses people.

PAT testing a Ariston Andris under sink water heater

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