Name: Atag A203C
Brand: Atag
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ATAG A-Serie

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 lling hose to the cold water tap;

2 Fill the hose completely with drinking water;

Connect the lled hose to the lling and draining valve of the heating installation;

4 Open the lling and draining valve;

5 Open the cold water tap;

6 Slowly ll 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 lling and draining valve are closed;

12 Disconnect the lling 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 lled

installation. Especially in the rst 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 relled again.

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