Replacing element on oso 20 RD

[gram1980]

Hi, i need to swop the element on an oso 20rd as it keeps tripping the rcd on my fuse board. Will i need to drain the tank down or can i just swop it over without ?
Regards Graeme[/img]

 

[Agile]

Needs draining first unless you want to get very wet.

I would also advise proper electrical tests first to ensure the element is indeed faulty.

Tony

 

[gram1980]

I will drain down then, i tested the element yesterday and had 12 ohm, but i think the insulation is breaking down when it cone upto temp. There's a spare element & stat on the tank so i will swop them over.
Will i have any problems when i come to fill back up ?
Cheers Graeme

 

[Agile]

You need to test the insulation resistance.

12 ohms is too low, should be 18 ohms for a 3 kW.

It is tripping an RCD from earth leakage is it and not an MCB from over current?

Its very shortsighted not to fit a new element.

The other element can be used as a temporary heater if the main one fails.

Tony

 

[DP]

There's a spare element & stat on the tank so i will swop them over.

Is the element really spare? More like for peak and off peak heating of water.

 

[gram1980]

As theres only a peak suppl the off peak element is therefore 'spare ,
I drained down & found that i couldnt release the elements anyway, so i swopped the connections to the 'spare' off peak element as a temp measure until i can get someone to have a look at it
Cheers for the advice

 

[HERTS P&D]

The spare as you say only heats up the top half of the cylinder and not all of it.

Andy

 

[DP]

As theres only a peak suppl the off peak element is therefore 'spare ,

A better option is to have two feeds to the cylinder. One to heat small quamtity (upper element) or the full cylinder for bath time. Does anyone have baths these days?