7.5
Draining the heating system
It may be necessary to drain the central heating system if radiators need
to be replaced, if there is a major water leak or if there is a risk of freezing.
1. Open the valves on all the radiators connected to the system.
2. Shut down 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.
Warning
The water may still be hot.
6. Close the drain valve when no more water comes from the draining
point.
Fig.20
MW-2000561-1
5
3
2
1
2
3
4
1
4
7 Maintenance
7740500 - v02 - 12022021
CFU
33
