Installation & Servicing instructions ATAG A-Series
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12 Isolating the boiler
In some situations it may happen that the entire boiler has to be deactivated. With the 2
function buttons for the DHW program and the CH program the boiler is put out of service.
Hot water program OFF: Press – until the lowest value is reached and then press – again.
The display shows -- and the middle is off.
Switching on with the + button takes place in reverse order.
CH program OFF: Press – until the lowest value is reached and then press – again. The
display is showing -- and the upper is off.
Switching on with the + button takes place in reverse order.
ATAG recommends to leave the plug in the wall socket, so that the circulation pump and
the three-way valve are activated automatically once every 24 hours in order to prevent
jamming.
If there is danger of frost it is advisable in this case to drain the boiler and/or
installation.
13 Commissioning
Work on the installation and/or boiler should only be carried out by qualied
personnel with calibrated equipment and appropriate tools.
At the time of commissioning, complete all revelant sections of the Benchmark
Checklist located on the inside back pages of the document.
For maintenance of the boiler the cover has to be removed.
Unscrew the 4 locking screws from the quick fasteners, unlock the quick fasteners and
remove the cover in a forward motion.
Changing settings, such as the burner pressure and the amount of air ow, is superuous.
Only in case of a failure or when replacing the gas block, venturi and/or fan, the O
2
percentage should be checked.
Always check all gas carrying parts for leaks (with a leak detection spray) after
(maintenance) work to the boiler.
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General
Weight and Dimensions
