Operating Instructions and Installation Instructions

Installation - for contractors

14. Maintenance

DANGER Electrocution

Before any work on the appliance, disconnect all

poles from the power supply.

Draining the appliance

DANGER Scalding

Hot water may escape during the draining process.

If the appliance needs to be drained for maintenance or to

protect the whole installation when there is a risk of frost,

proceed as follows:

» Close the shut-off valve in the cold water inlet line.

» Open the draw-off valve.

» Undo the water connections on the appliance.

Cleaning the strainer

You can clean the tted strainer after removing the cold

water supply pipe.

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Checking the earth conductor

» Check the earth conductor (in Germany e.g. BGV

A3) on the earth conductor contact of the power

cable and on the appliance connector.

Appliance storage

» Store the dismantled appliance in a room free from

the risk of frost, as water residues remaining inside

the appliance can freeze and cause damage.

Replacing the power cable for the MTH 570

» If replacing the cable for the MTH 570, use a power

cable with 4 mm² cross-section.