4 Unscrew the fittings and make sure they are
clear of obstructions.
5 Remove the lime scale using a appropriate
descaling product (citric acid, phosphoric
acid).
NOTE
Use Teflon tape or a liquid sealant when
inserting the ring in the heat exchanger again.
3 Collect the water contained in the tube in an
appropriate container.
Fig. 137
Edition 01 of 08/2017
5.11
SERVICE MANUAL
Fig. 139
Fig. 140
Fig. 138
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