The top of the concealed element cleans up really easy with a scourer type pad. Not brillo, those cheap green things from chickenfeed or similar.
Remember to lift of the thermostat sensor cover and clean it. It can harbour all sorts of crud. No problems with mine, a really good rolling boil. Just not sure on the calcs for measuring the water volume. My Urn is 337mm in dia - average.
Just note that there are two thermostats -- the long rod thingy under the cover, and the boil dry protector which is on the underside of the element. Everything has to be clean or one of them will stop the element.
My super tip for cleaning the concealed element - vinegar. I only use mine for a HLT so the calcium builds up. No amount of napisan was getting it off so I spashed about 500ML of vinegar and 500ML of water in the bottom with a chux.
Keep the chux super wet with the solution over the element. Every 30 min or whenever you think of it go back to your urn and give it a gentle wipe - starts coming off really easy and super shiny again
Hi all,
My crown urn died a horrible death about 12 mths ago, due to the boil modification.
Being out of warranty, I was stoked that a replacement element and installation instructions were avaialble for around $65 all up.
Thumbs up to crown, now I am back doing 20L batches, (have a 4 ring burner and 120L pot sitting idle at the moment!)
Cheers
DK
Most acids work. A good one is a tub of Mckenzies citric acid from the icing sugars and baking powder shelves, a third of a tub in 250ml of hot water, scrub with a scotch brite, works a treat. Has the advantage that it doesn't leave a vinegary after taste.