Bosch T2400S 8 ND 23 Training And Service Information For After Sales page 42

Pict.43 – Heat Cell View with sealants between elements
In hard water regions it may be necessary to descale the heat exchanger body, using a
proper descaler. Fill the heat exchanger with the descaling solution and let it act until the
solution stops bubbling. Drain and thoroughly wash out the exchanger with clean water.
Warning: Acid/water solutions must be used with extreme caution. Take care not to
splash on to the skin or into the eyes. Wash any affected areas with large amounts of cold
water and seek medical advice.
Pict.44 – heat exchanger descaling
Re-assemble the heat exchanger ensuring its correct position on the two support hooks in
the appliance back plate, good conditions of sealings and tightness between heat
exchanger, collector and burner.
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