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7.4 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 valve
valve housing
valve stem
• Use a brush to remove any limscale from the valve
housing, the bores and the valve seat on the valve stem
(do not use a wire brush).
• Wash the valve housing and the valve stem with a
lukewarm soap solution, rinse the parts well with tap
water and let them dry.
Water cup • Remove any limscale from the water cup and its con-
nectors using a brush (do not use a wire brush).
If the water cup is heavily calcied, place it in an 8%
formic acid solution (observe safety notes in chap-
ter 7.5), until the limescale comes off.
• Wash the water cup with a lukewarm soap solution and
rinse well with tap water.
Drain screen of the steam cylinder • Remove any limscale from the drain screen using a brush
(do not use a wire brush) and remove loose limescale
inside the drain connector of the steam cylinder.
If the drain screen is heavily calcied, place it in an 8%
formic acid solution (observe safety notes in chap-
ter 7.5), until the limescale comes off.
• Wash the drain screen with a lukewarm soap solution
and rinse well with tap water.
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