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22 | 89014383; Version 2 | Operating instructions UC-Serie
4.2.9 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 components may develop scale. Limescale deposits and dirt that remain in the machine can contrib-
ute towards hygiene risks, while scaling can lead to failure of heating elements. In case of limescale deposits, the ware-
washer must be descaled.
Using the descaling programme (} page 22), scale is removed from the inside of the warewasher. We recommend run-
ning the descaling programme at the end of the working day only, as the machine’s tank is emptied when the programme
starts and ends.
The water lines and the boiler can only be descaled by an authorised service technician.
For descaling, you require an acid-based descaler suitable for commercial warewashers. Winterhalter recommends A 70
LS descaler.
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.
Ø Wear protective clothing, protective gloves and protective goggles.
Ø Observe the danger and safety notes on the canister 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.
Ø Do not mix active chlorine cleaner and acid-based descaler.
Ø 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 there-
fore must not remain in the interior of the machine (e.g. overnight).
Ø Do not cancel the descaling programme and follow the instructions on the display.
Starting the descaling programme
When adding the descaler, observe the tank volume and dosing recommendation.
Item Name
1 Cancel descaling programme (possible as long as no descaler has been added)
2 Repeat descaling programme
3 End descaling programme
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