Descale - Miele PTD 901 Originalbetriebsanleitung

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English 4 Software

4.1.6 Descale

If the warewasher is operated with hard water and without water treatment, then the boiler, the interior of the machine, all the water
lines and other components may develop scale. Grease residues and dirt that remain in the machine can contribute towards hygiene
risks, while scaling can lead to failure of heating elements. Regular removal of these coatings is recommended.
The interior of the warewasher can be descaled using the descaling programme. We recommend running the descaling programme at
the end of every working day, as the machine's tank is emptied when the programme starts and ends.
For descaling, you need an acid-based descaler suitable for commercial warewashers.
The water lines and the boiler can be descaled only by an authorised service technician.
Warning
Risk of chemical burn due to contact with descaler
Contact between descaler and the skin or eyes can lead to severe burns or serious eye damage.
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Wear protective clothing, protective gloves and protective goggles.
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Observe the danger and safety notes on the container and safety data sheet.
Warning
Danger of chlorine gas developing
Mixing active chlorine cleaner and acid-based descaler produces chlorine gas. Contact with chlorine gas leads to eye,
nose and throat irritations.
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Do not mix active chlorine cleaner and acid-based descaler.
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Ensure good ventilation when you descale the warewasher.
Note
Danger of corrosion due to descaler solution
Descaler solution has a corrosive effect when in contact with metals and plastics for a long time and therefore must not
remain in the interior of the machine (e.g. overnight).
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Do not terminate the descaling programme and follow the instructions on the display.
Start the descaling programme
When adding the descaler, observe the tank volume and dosing recommendation.
Item Name
1 Terminate descaling programme (possible as long as no descaler has been added)
2 Repeat descaling programme
3 End descaling programme
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12020302; 2021-09
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Operating instructions PTD 901