Installation & Servicing instructions ATAG iC-Range
54
Work on the installation and/or boiler should only be carried out by qualified personnel with
calibrated equipment.
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 2 locking screws from the fasteners at the top of the boiler, unlock the fasteners and remove the
cover in a forward motion. See figure 16.a
Always refit and turn the 2 screws tight in the fasteners A and B.
Changing settings, such as the burner pressure and the amount of air flow, is superfluous. Only in case of a
failure or when replacing the gas block, venturi and/or fan, the CO
2
percentage should be checked.
Always check all gas carrying parts for leaks (with a leak detection spray) after (maintenance) work
to the boiler.
Close the relevant commissioning valves during the maintenance activities. See figure 15.a.
Draining the boiler
- Shut down the CH and DHW program and disconnect the 230V power supply
- Close the isolation valve CH flow (1) & CH return (2)
- Unscrew the cap nut from the return pipe filling loop connection (3)
- Connect a hose and drain socket (4) to the return filling loop connection (3) and lead the other end of the
hose to the drain.
- Slowly open the valve (2A) of the filling loop on the return pipe completely. CH water will only be drain out
from the boiler.
- If the CH water from the system and boiler needs to be drained, open the CV isolation valve (2)
Reassembly takes place in reverse order.
OPEN
CLOSED
CH FLOW
CH RETURN
GAS
DHW COLD
Figure 15.a
OPEN
CLOSED
CH FLOW
CH RETURN
Figure 15.b
1
2A
3
OPEN
CLOSED
2
4
2
2A
