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5.5 Draining the installation
It may become necessary to empty the water from the heating system
when the radiators have to be replaced, should there be a major
water leak or a risk of frost.
To do this, proceed as follows:
1. Open the valves on all radiators connected to the heating system.
2. Cut the power supply to the boiler.
3. Wait around 10 minutes until the radiators are cold.
4. Connect an evacuation hose to the plug located at the lowest
level.
5. Place the end of the hose in a discharge sump or in a place where
the water discharged from the valve can not do any damage.
6. Open the filling/draw-off valve on the heating system. Bleed the
heating installation.
The water may still be hot.
7. When no more water comes out of the drainage plug, close the
drainage valve.
11/09/09 - 300010111-001-B
T000181-B
T000185-A
T000858-A
DTG 1300-24 Eco / V130
5. Checking and maintenance
11
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