Nordmann DC4 - Notes on Cleaning the Unit Components

41
5.4 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 us-
ing a rubber hammer. Then, rinse the tubes well with hot tap
water.
Inlet valve
Strainer insert
• Remove strainer insert with pointed pliers. Use a brush (do
not use a wire brush) to remove any limescale.
• Wash strainer insert with a lukewarm soap solution, then rinse
well with tap water.
Let the inlet valve dry before reinstallation!
Drain pump
O-ring
Vibration damper pump wheel
• Use a brush to remove any limscale 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.
Note: If the pump needs to be replaced remove the vibration
damper (noice reduction) from the defective pump and ret it on
the new pump.
Cylinder receptacle in the unit
O-ring
• Remove any limscale 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 5.5),
until the limescale comes off.
• Wash the cylinder receptacle with a lukewarm soap solution
and rinse well with tap water.
• Check O-ring and replace if necessary.
Water cup • Remove any limscale from the water cup and its connectors
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 chapter 5.5), until the
limescale comes off.
• Wash the water cup with a lukewarm soap solution and rinse
well with tap water.