19
Care and Maintenance
Decalcifying the heating coil
Calcified machines use an unnecessary amount of energy because the water can only
be heated slowly and the excess pressure valve feeds a part of the water back into the
pump circuit.
Calcified machines can be recognised by increased pipeline resistance.
Check pipeline resistance by disconnecting the high pressure lance from the gun and
switching the machine on. A full jet of water emerges from the gun. The machine must
be decalcified if the pressure shown on the manometer is greater than 25 bars.
Decalcifiers are caustic!
Observe the instructions for usage and accident prevention. Wear
protective clothing to prevent the decalcifying agent from contacting
your skin, eyes and clothing (e.g. gloves, safety mask etc.)
Proceed as follows to decalcify the machine:
Unscrew the high pressure hose from the machine and decalcify it separately.
Put the detergent suction hose into a container of decalcifying solution.
Set the dispenser valve to the maximum concentration.
Switch on the machine.
Hold the gun in a separate container and press the trigger.
Wait for about a minute until the decalcifier comes out of the gun
(recognisable by its whitish colour).
Switch off the machine and allow the solution to act for about 15-20 minutes.
Switch the machine back on and rinse it through with clear water for about 2
minutes.
Now check whether pipeline resistance is back to an acceptable level. Repeat the
decalcifying process if the pressure without the high pressure lance is still above 25
bars.
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