Operating Instructions
AT
AG QR-Series
8
Filling and de-aeration of the ATAG QR and the heating installation
The heating installation is filled according to the standard method.
The installation must have been deaerated, both on the heating and the warm water side.
The water pressure can be read off in bar, either on the analog pressure indicator or via
the Info button. As soon as the heating installation has been filled and de-aerated, the
boiler will be ready for operation.
During the initial commissioning or after a power failure, the control system
starts the automatic de-aeration program. This function runs for approximately
16 minutes and stops automatically.
5
Replenishing the central heating system
The central heating installation needs to be filled with potable (drinking) water. For top
-
ping up the installation you use the filling loop according to the following procedure:
(If in any doubt please contact your dealer)
1
Connect the filling loop to the cold water tap;
2
Slowly open the filling loop;
3
Open the cold water tap;
4
Fill up slowly to 1.5 to 1.7 bar:
Press I key and turn the knob to "water pressure". Value on the display
increases;
5
Close cold water tap;
6
Check whether the automatic de-aeration program has been running.
If not yet de-aerated:
Hold down the E button for more than 3 seconds. This function runs
for approximately 16 minutes;
7
De-aerate the complete installation, start at the lowest point;
8
Check the waterpressure and if necessary top it up to 1,5 to 1,7 bar;
0
Close the filling loop.
After completion of the de-aeration program, the boiler will operate again.
Check the water pressure regularly and top up the installation when necessary.
The working pressure of the installation should be between 1.5 and 1.7 bar when the
installation is cold.
(Note: Before topping up the pressure, first fill the hose with water, which prevents the
entry of air into the heating system).
It can take a while before all air has dis-appeared from a filled installation. Es
-
pecially in the first week noises can be heard which indicate the presence of air.
The de-aeration of the boiler will make this air disappear, which means the water
pressure will reduce during this period and therefore topping up with water will
be necessary to adjust the flow water temperature.
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