Thermal Cut Out A Requirement?

[paulcopeman]

is it a requirement to have a thermal switch on the thermostat in hot water tanks 

 

[NozSpark]

I'm afraid so...

It's to try and ensure that the cylinder doesn't boil over into the header tank if the main stat fails

 

[paulcopeman]

so it would be an observation on a EICR if no cut out switch with advisory to have one instaled?

 

[NozSpark]

Definitely

 

[paulcopeman]

thanks

if thermostst is broken then water tank will keep heating up  so if thermostat is broken cut out switch wont work or am i wrong??? :C

 

[NozSpark]

Yes, you're wrong

There are two thermostats in series in modern stats,,,,, the preset temp and over temp safety cut out

 

[paulcopeman]

ok thanks i understand now. just wondering how long these have been around for. thanks for your help

 

[NozSpark]

Like I said,,,,there are two thermostats in series within the tank stat

 

[steptoe]

so it would be an observation on a EICR if no cut out switch with advisory to have one instaled?

Definitely

NO,

unless you dont word your test sheets correctly,

I dont see why we have to ensure the clients equipment is adequate,

do you also check the cooker has an overload/overtempo stat fitted.?

test to the point of local isolation only.

 

[NozSpark]

Well,,, I would always note the fact of a non-compliant tank stat on an EICR,,, however I wouldn't give it a code

 

[steptoe]

Well,,, I would always note the fact of a non-compliant tank stat on an EICR,,, however I wouldn't give it a code

non compliant with what reg.?

 

[NozSpark]

BS EN 60335-2-73

IAW the ESC's guidance note on EICRs - page 15

 

[SLIPSHOD & SLAPDASH]

Its only code-able if a non metalic header tank is in use.

 

[Bruspark]

The requirement for a second safety cut out came in c 2004 If I recall correctly

 

[kerching]

Have a look at the draft proposals for Amd3...... I think it gets a mention

Just sleighing

 

[Adrian]

Its only code-able if a non metalic header tank is in use.

as slip has said 

 

[Harvey]

NO,

unless you dont word your test sheets correctly,

I dont see why we have to ensure the clients equipment is adequate,

do you also check the cooker has an overload/overtempo stat fitted.?

test to the point of local isolation only.

I agree

 

[binky]

its in the inspection guidelines on NICEIC website. Was introduced after baby got boiled in its cot - overheating immersion melted plastic header tank that was over cot. Baby died. Law was introduced subsequntly. Not sure it applies to non-rental properties, but I don't remember there being a distinction between plastic and metal headers

 

[Technician]

 but I don't remember there being a distinction between plastic and metal headers

The place to look might be the Water Regulations.  Some plastics are only

good up to 60Cel but some are good to 100 Cel.

Horses for courses.

 

[ProDave]

Personally I would not be happy sleeping underneath any type of water tank. Perhaps it's building regulations that need changing?

Every house I have ever lived in has had it's water tanks above a bathroom or airing cupboard.  But I do see a surprising amount of houses with cold and hot tanks above a bedroom. That just seems daft to me when there are less critical placed they could be located.  Or better still don't have them in the first place.