Nordmann Engineering AT4 D - Cleaning Other Components; Cleaning Drain Screen, Drain Cup, Receptacle, and Interior; Interior Cleaning Safety Warning

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Unit component What to clean and how to clean
Drain screen of the steam cylinder
• 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 calcied, 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.
Drain cup
• 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 calcied, 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.
Cylinder receptacle
• 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 calcied, 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.
Interior of the unit
(water side only)
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!