Nordmann AT4 Operating Instructions Manual page 57

Unit component
Drain screen of the steam cylinder
Drain cup
Cylinder receptacle
Interior of the unit
(water side only)
What to clean and how to clean
• Remove any limescale from the drain screen using a
brush (do not use a wire brush) and remove loose limes­
cale inside the drain connector of the steam cylinder.
If the drain screen is heavily calcified, place it in an 8%
formic acid solution (observe safety notes in chap-
ter 6.5), until the limescale comes off.
• Wash the drain screen with a lukewarm soap solution
and rinse well with tap water.
• Use a brush to remove any limescale from the drain
cup and the receptacle on the bottom side of the unit
(do not use a wire brush).
If the drain cup is heavily calcified, place it in an 8%
formic acid solution (observe safety notes in chap-
ter 6.5), until the limescale comes off.
• Wash the drain cup and the receptacle on the bottom
side of the unit with a lukewarm soap solution, rinse
the parts well with tap water.
• Remove any limescale from the cylinder receptacle
and its connectors using a brush (do not use a wire
brush).
If the cylinder receptacle is heavily calcified, place it in
an 8% formic acid solution (observe safety notes in
chapter 6.5), until the limescale comes off.
• Wash the cylinder receptacle with a lukewarm soap
solution and rinse well with tap water.
Wipe the interior of the unit with a damp cloth without using
any cleaning agent.
CAUTION: Take care that the electrical connections and
the electronic components remain dry!
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