25
COMMISSIONING AND MAINTENANCE
3.2.2
Resetting the burner and safety thermostat
To restore normal startup conditions, open the protective cover
over the control panel and turn the function selector to position
(II) "Reset burner" for at least 1 second before returning it to
position (I). Wait for the burner to complete the entire ignition
cycle again, up to the ignition of the flame.
20
100
4
40 60 80
3 2 1
0
0
120
If boiler temperature becomes too high, the manual reset safety
thermostat trips.
9
No warning signal is given if the safety thermostat trips,
but the fact that is has tripped can be seen from the boiler
temperature gauge (T>100°C).
Proceed as follows to reset the safety thermostat:
− Wait until boiler temperature falls below 80°C;
− Open the control panel cover;
− Unscrew the cap over the safety thermostat reset button;
− Press the reset button;
− Replace the cap.
20
100
4
40 60 80
3 2 1
0
0
120
9
Eliminate the cause of the overheating before restarting the
boiler.
3.3
Checks during and after initial start-up
Once the boiler has started up, make sure that it shuts down
and re-starts properly when:
− The boiler thermostat setting is changed;
− The function selector is moved from position (
I
) to (
0
) and
back;
20
100
4
40 60 80
3 2 1
0
0
120
20
100
4
40 60 80
3 2 1
0
0
120
− The room thermostat or timer setting is changed;
− Make sure that all the pumps in the system are free and
rotate in the right direction;
− Turn the mains power switch OFF and make sure that the
boiler shuts down completely.
Provided all the above conditions are satisfied, start the boiler up
again, then analyse the combustion fumes. The sampling hole
for flue gas analysis must be located along the straight section
of flue at an adequate distance from any curves or elbows. Refer
to applicable standards for the dimensions of the hole and its
correct position L along the flue pipe (minimum and maximum
distances from the boiler exhaust).
L
≥5°
9
Always plug the sampling hole after analysing the flue
gases.
