DeDietrich AFC 18 User Manual page 29

Fig.32
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4
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1. Open the valves of all the radiators connected to the system.
2. Cut the electrical power to the boiler.
3. Wait approximately 10 minutes, until the radiators feel cold.
4. Connect a drain hose to the lowest draining point. Place the end of the
hose in a drain or at a place where drained pipe water will not cause
any damage.
5. Open the central heating system filling/draining valve. Drain the
installation.
3
6. Close the drain valve when no more water comes from the draining
point.
MW-2000561-1
Warning
The water may still be hot.
7 Maintenance
AFC 29