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3062087_0207
Service
Cleaning the DHW heat exchanger
Subject to the water quality it may be advisable to regularly
descale the DHW heat exchanger on the DHW side.
- Close the shut-off valve on the cold water side and open the
plug on the boiler. Catch any escaping water in a suitable
container.
- Close the shut-off valves on the heating water side (flow and
return). Drain the boiler via the drain valve of the hydraulic
assembly.
- Undo the two heat exchanger fixing screws and pull the
exchanger above the hydraulic assembly out of the boiler.
- Treat the heat exchanger with a commercially available
descaler.
- Reassemble in reverse order.
- When filling the boiler, proceed in accordance with the
corresponding chapter in these instructions. Only fill the boiler
after cleaning the strainer in the cold water inlet, if required.
Cleaning the strainer in the cold water inlet
- Close the cold water inlet on the system side.
- Remove the cold water inlet shut-off valve on the equipment
side. Catch any escaping water in a suitable container.
- Pull out the strainer and blow through with compressed air
or clean it under running fresh water.
- Reassemble in reverse order using new gaskets.
Fixing screws
Cold water inlet with strainer
Drain valve
Heat exchanger
