Test Function And Combustion Analysis; Maximum Gas Fl Ow Combustion Analysis; Minimum Gas Fl Ow Combustion Analysis; Gas Setting - Ariston E-Combi 24 Installation And Servicing Instructions

Test function and combustion analysis

The boiler has two pressure taps to measure the combustion gas
temperature, the combustive air and the concentrations of O
on the outside of the fl ue gas header.
To access these pressure taps, unscrew the screw which holds the
blanking cover and its seal together.
Checking the gas setting
To carry out analyses of combustion, the test function must be
activated.

Maximum gas fl ow combustion analysis

Activate the test function at the maximum heating power, pushing
for 5 seconds the RESET until the yellow led 9 blinks (also 60°C led is
lit to indicate that Chimney is at max. CH absolute) The rotate the CH
knob to the min., intermediate position or max position it's possible
to switch between min, max CH absolute and max DHW power
(respectively the 40°C, 60°C and 80°C are lit to indicate the power
level.
The function is automatically deactivated after 10 minutes or by
pressing the RESET button.
Wait for the boiler to stabilise before carrying out the combustion
analyses. Check the CO value according to the table below.
2
Important: do not remove silencer 17
N.B. When the front combustion chamber panel is open, the CO
value drops by 0.3%.
CO 24
2
maximum
minimum
G20 9.0 ± 0.2
G31 10.7 ± 0.2
If the values taken diff er from the table, adjust
the gas valve following the procedure described
below.
Adjust the CO content to ± 0.2 by turning
2
setting screw 50 (2.5 mm allen key)
- tighten to lower the CO
- unscrew to increase the CO
Set the content by turning the screw about a
1/4 of a turn then wait after each change for
approximately 1 minute for the CO
stabilise, then repeat.
and CO
2
30 38
CO (%)
2
9.0 ± 0.2 9.4 ± 0.2
10.0 ± 0.2 10.6 ± 0.2

Gas setting

lower Wobbe index
value
2
15°C, 1013 mbar) (MJ/m3)
value
2
gas valve restrictor(ø)
gas fl ow max/min
value to
(15°C, 1013 mbar)
2
(nat - m3/h) (GPL - kg/h)
2
Only a 2.5 key
must be used

Minimum gas fl ow combustion analysis

Activate the test function at minimum power in either heating or
domestic hot water production.
Wait for the boiler to stabilise before carrying out the combustion
analyses. Check the CO
Important: do not remove silencer 17
N.B. When the combustion chamber is open, the CO
by 0.3%.
If the values taken diff er from the table, adjust the gas valve following
the procedure described below.
To adjust the CO value, remove cap, adjust the CO
2
turning setting screw 51 (4 mm allen key)
- unscrew to lower the CO
- tighten to increase the CO
Set the content by turning the screw about a 1/4 of a turn then wait
after each change for approximately 1 minute for the CO
stabilise, then repeat.
Once the settings and analyses are complete, exit test mode by
pressing Reset and reposition the blanking cover and its seal correctly.
2
G20
45.67
NO
max D.H.W 2.65
max C.H. 2.33
min 0.58
commissioning
value according to the table above.
2
content to ± 0.2 by
2
value
2
value
2
Only a 4 key must be used
24 30
G31 G20 G31
70.69 45.67 70.69
3.80 NO 4.50
1.94 3.17 2.33
1.71 2.96 2.17
0.43 0.69 0.50
50
value drops
2
value to
2
38
G20 G31
45.67 70.69
NO 5.25
4.02 2.95
3.28 2.41
0.79 0.58
31