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A-Serie
21
5
Filling the heating installation
If you want to top up the heating installation, proceed as follows:
(If in doubt, check with your installer)
1 Connect the filling hose to the cold water tap;
2 Fill the hose completely with drinking water;
3 Connect the filled hose to the filling and draining valve of the heating installation;
4 Open the filling and draining valve;
5 Open the cold water tap;
6 Slowly fill the CH installation to 1,5-1,7 bar:
Press the i-key until A6 appears (water pressure). The value on the display
increases;
7 Close the cold water tap;
8 The code C1 05 will appear on the display the moment the pressure
exceeds
Venting program of approx. 7 min. becomes active;
9 Bleed the entire CH installation: start at the lowest point;
10 Check the water pressure and if necessary top off until 1.5 to 1.7 bar
11 Make sure the cold water tap and filling and draining valve are closed;
12 Disconnect the filling hose;
After the venting program (c1 05) of approx. 7 minutes has ended, the boiler
will be operational again.
Check the water pressure regularly and top it up if necessary. The operating
pressure in the system under cold conditions should be between 1.5 and 1.7
bar.
It may take some time before all the air has disappeared from a newly filled
installation. Especially in the first week, sounds may be heard that indicate air. The
automatic air vent in the boiler will let this air escape, causing the water pressure
to drop during this period and water will need to be refilled again.
