(1) Limescale is the deposits left behind by hard water. Limescale is mainly made up of calcium and magnesium. We advise you not to use acetic acid-based descaler (vinegar), as this could have a negative effect on the taste of the coffee. Note: Never use a vinegar-based descaling agent with 8% or more acetic acid to descale the appliance, as this may cause damage. (2) citric acid is used mainly for home use, for getting rid of lime scale,(kettles, baths, toilets), in hard water areas.It is a natural material (found in fruit), and is non toxic, and doesn’t smell like vinegar would if you used that.By the way, I’ve answered your sulfamic acid question. (3) Citric acid is a colourless fruit acid. It is obtained directly from citrus fruits but can also be produced biotechnically. In system cleaning, the citric acid in AquaStar 1 is used for natural and effective descaling of the drinking water system (the water heater in particular). The descaling effect is achieved by a combination of the acid and the formation of a calcium complex. The advantage of using citric acid instead of vinegar for cleaning drinking water systems is the avoidance of the unpleasant vinegary taste. Citric acid also affords better corrosion protection to stainless steel containers by removing free iron from their surfaces. Vinegar is produced by fermenting alcoholic liquids with acetic acid bacteria (Mycoderma aceti). Vinegar is a descaling agent due to its acid content, but it leaves behind an unpleasant taste which adheres to plastics and rubber and is very difficult to remove. Vinegar is not suitable for descaling drinking water systems in mobile homes, as it attacks rubber seals and even some metals. (4) Many people believe that vinegar is the best limescale remover. However, using a citric acid-based decalcifier may cause precipitation and thus deposits that can prevent your household appliances from functioning properly, for example by clogging the fine lines and valves in...
Bibliography: (1) http://www.p4c.philips.com/cgi-bin/dcbint/cpindex.pl?scy=ZA&slg=ENG&ctn=HD5405/60&dct=FAQ&refnr=0092154&view=aa12_view_partial.html&session=20120502004843_22.214.171.124&faqview=1
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