The central heating installation needs to be filled with potable (drinking) water.
For topping up the installation you use the filling loop according to the following
procedure:
(If in any doubt please contact your dealer)
Switch all functions off (heating, DHW and pump);
Slowly open the filling loop (Indication on display increases);
STOP appears on the display;
De-aerate the complete installation, start at the lowest point;
11 If A xx appears on the display, wait for 17 minutes;
13 Close the filling loop;
15 Be sure that the filling loop is closed.
After the automatic de-aeration programm (A xx) is finished the boiler will
return to the Good reading or Technical reading.
14 Press the ‘STEP’-button;
12 Check the waterpressure and if necessary top it up to 1,5 to 1,7 bar
10 Activate functions required (heating , DHW and/or pump );
8 Check the water pressure and if necessary top it up;
6 Close the filling loop;
4 Fill up slowly to 1.5 to 1.7 bar;
2 Briefly push the 'STEP'-button: P x.x = water pressure in bar;
Replenishing the central heating system
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