Vitodens HX Cleaning

Mike T., Swampeast MO

From the manual:

"Remove deposits of soot with alkaline agents containing tenside."

"Remove coatings and (yellowish brown) suface discoloration with slightly acidic, chloride-free cleaning agents based on phosphoric acid (e.g. Antox 75 E)"

"Rinse thoroughly with water."

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So what the f#(* is "tenside"?

"@odondon irl: I (german chemist) used the expression ''tenside'' in conversation with an american native speaking chemist - and he asked me: ''What do you mean with 'tenside'?'' Further discussions with colleagues (german and american chemists) seem to proof that ''tenside'' doesn't exist in the english/american language - neither in science nor in common use.
Due to the fact that your experience is that ''tenside'' is well-known for a native speaker, I suppose the knowledge comes from the ingredients table on washing powders - as you pointed out - and originally washing powders come from the german chemical industry (HENKEL).
Nevertheless ''tenside'' is not correct in a scientific sense (probably scientists do not use washing powders themselves :-) ) - so I recommend to entitle ''tenside'' not as ''chem.'' but as ''coll.''"

In other words, "tenside" is essentially a detergent with high surfactant qualities like "Tide" WITHOUT CHLORINE!!!!!!

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As for Antox 75 E?

Called Viessmann US today--was told to call engineer at Viessmann Canada. Told him that "slightly acidic, chloride-free cleaning agents based on phosphoric acid" sure sounded like Naval Jelly (available anywhere) and commonly used to remove rust and other stains from cast iron and steel. Here's the link to the Material Safety Data Sheet listing ingredients: <A href=http://www.setonresourcecenter.com/msds/docs/wcd0002a/wcd02a5c.htm >"Naval Jelly MSDS"</A>

Engineer at Viessmann said it couldn't hurt and he's going to check and find if Naval Jelly is an "American" substitute for Antox 75 E.

The Antox 71E and Antox 73E mentioned by ME are MUCH stronger--known as "pickling paste" in the welding trade. Used to remove heavy scale and WELDING discoloration from stainless steel.

Viessmann Engineer also said that the "rust-colored" stains I saw are not rust. (I really don't doubt that in the least.) He said that particles are most likely from "things" in the natural gas--likely containing sulphur.

He said he'd get back--will let you know what I hear.

S Ebels

Mike

Pick up a bottle of "the Works" at the local hardware store. It'll be in the plumbing section or else the home cleanup supplies. It is phosphoric acid. Just what the doctor ordered and it sure did the trick on the muddy Vito I was into the other day.