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9.3
Venting the installation
Fig.54
Venting the installation
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2
11
4
A
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7642066 - v01 - 29092015
9.2.3 Chimney sweep instructions
Check the combustion each time the flues are swept.
Any air in the appliance, the pipes or the valves must be removed in order
to prevent annoying noises that may occur during heating or when tapping
water. Proceed as follows:
3
5
6
C
B
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AD-3000484-B
1. Open the valves of all the radiators connected to the installation.
2. Set the room thermostat to the highest possible temperature.
3. Wait until the radiators are warm.
4. Switch off the boiler.
5. Wait approximately ten minutes, until the radiators feel cold.
6. Vent the radiators. Work from the bottom to the top.
7. Open the venting valve with the bleed key, keeping a cloth pressed
against the vent.
8. Wait until water comes out of the venting valve and then close the
venting valve.
Warning
The central heating water may still be hot.
9. Turn the boiler on.
A three-minute venting cycle is performed automatically.
10. After venting, check that the water pressure in the installation is still
adequate.
Note
If the water pressure is lower than 0.8 bar, water must be added. If
necessary, top the installation up (recommended water pressure
between 1.5 and 2.0 bar).
11. Set the room thermostat or the control.
9 Maintenance
EFU
37
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