DeDietrich MCA 45 User Manual page 40

6. Checking and maintenance
39
7. Open the bleed connection using the bleed key provided whilst
keeping a rag pressed against the connection.
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8. Wait until water comes out of the bleed valve and then close the
bleed connection.
9. Switch on the boiler. A vent cycle of a duration of around 3 minutes
is carried out automatically.
10.After venting, check whether the pressure in the installation is still
sufficient.
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11.Set the heating set point.
CAUTION
The water may still be hot.
If the water pressure is lower than 0,8 bar, more water
should be added. If necessary, top up the water level in the
heating system (recommended hydraulic pressure
between 1,5 and 2,0 bar).
¼ See chapter: "Filling the system", page 35
MCA 45 - 65 - 90 - 115
06/09/2010 - 300024828-001-A