Nordmann AT4 - Notes on Cleaning the Unit Components

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6.4 Notes on cleaning the unit components
Unit component What to clean and how to clean
Water hoses • Remove any limescale by slightly knocking on the tubes
using a rubber hammer. Then, rinse the tubes well with
hot tap water.
Inlet valve
strainer insert
• Use a brush (do not use a wire brush) to remove any
limescale inside the inlet valve and on the strainer.
• Wash inlet valve and strainer insert with a lukewarm
soap solution, then rinse well with tap water.
Let the inlet valve dry before reinstallation!
Drain pump
Oring
Pump wheel
• Use a brush to remove any limescale from the pump
housing and the pump wheel (do not use a wire
brush).
• Then, wipe pump wheel with a damp cloth. Wash the
pump housing with a lukewarm soap solution and rinse
well with tap water.
Let the drain pump dry before reinstallation!
Water cup • Remove any limescale from the water cup and its con
nectors using a brush (do not use a wire brush).
If the water 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 water cup with a lukewarm soap solution and
rinse well with tap water.