6.8.2
Filling the siphon
The siphon is supplied separately with the boiler as standard (including a
flexible plastic drain hose and a transparent extension hose for the auto
matic air vent). Fit the siphon under the boiler.
1. Fill the siphon with water up to the mark.
2. Push the siphon firmly into the appropriate opening
underneath
the boiler.
The siphon should snap shut with a click.
3. Carefully pull the siphon downwards.
4. Check whether the siphon is firmly fitted in the boiler.
Danger
The siphon must always be sufficiently filled with water. This pre
vents flue gases from entering the room.
6.8.3
Filling the system
Important
In order to be able to read off the water pressure from the control
panel, the boiler must be switched on. If the water pressure is too
low, the boiler or the boiler pump will not start.
1. Fill the central heating system with clean tap water.
Important
The recommended water pressure is between 1.5 and 2 bar.
2. Check the water-side connections for tightness.
Fig.38
Filling the siphon
AD-0000231-02
2
3
4
1
6 Installation
7625116 - v.04 - 17012017
39
