Draining The Installation - DeDietrich NeOvo EcoNox EFU 22 User Manual

9 Maintenance
9.4

Draining the installation

Fig.55 Draining the installation
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38 EFU
It may be necessary to drain the central heating installation if radiators
need to be replaced, if there is a major water leak or if there is a risk of
freezing. Proceed as follows:
1. Open the valves of all the radiators connected to the installation.
2. Switch off the boiler's electrical connection.
3. Wait approximately ten minutes, until the radiators feel cold.
4. Connect a drain hose to the lowest draining point. Place the end of
5. Open the central heating system fill/drain valve. Drain the installa­
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6. When water stops flowing from the draining point, close the draining
AD-3000488-A
the hose in a drain or at a place where drained pipe water will not
cause any damage.
tion.
Warning
The central heating water may still be hot.
valve.
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