11
> 2 sec
MAX
MIN
+
Co
---
0
0
6
.
rpm
0
0
6
.
rpm
or
fan speed
in CH
The displayed value refers to the number of revolutions divided by 100.
Set the maximum rpm value.
0
0
7
.
rpm
0
0
7
.
rpm
confirm
MAX
rpm
The boiler works at the maximum power level.
Check the analyser to ensure the max CO
2
value complies with the indica-
tion given in the table. If the value is different, calibrate the gas valve - see
paragraph “3.10 Gas valve calibration”
.
table 1
CO
2
max
METHANE
GAS (G20)
LPG
(G31)
25C f
9,0
10,0
%
30C f
9,0
10,0
%
Set the minimum rpm value
0
1
6
.
rpm
0
1
6
.
rpm
confirm
MIN
rpm
The boiler works at the minimum power level.
Check the analyser to ensure the min CO
2
value complies with the indica-
tion given in the table. If the value is different, calibrate the gas valve - see
paragraph
“3.10 Gas valve calibration”.
table 2
CO
2
min
METHANE
GAS (G20)
LPG
(G31)
25C f
9,0
10,0
%
30C f
9,0
10,0
%
After completing the check:
quit the function by pressing
0
5
6
.
rpm
exit function
reposition the previously removed components
set the boiler to the required operating mode, depending on the season
regulate the heat request temperature values according to the customer’s
needs.
b
When the combustion analysis function is active, all heat requests are
inhibited and the message “CO” appears on the display.
IMPORTANT
The combustion analysis function is active for max. 15 minutes; the burner
shuts down if a delivery temperature of 95°C is reached. It will ignite again when
the temperature falls below 75°C.
b
The combustion analysis function is usually carried out with the 3-way
valve on heating. The 3-way valve can be switched to DHW by genera-
ting a DHW request at the maximum output while the function itself is still
active. In this case, the DHW temperature will be limited to a maximum
value of 65°C. Wait for the burner to fire.
3.9 Adjustments
The boiler has already been adjusted by the manufacturer. If the adjustments
need to be made again however e.g. following extraordinary maintenance, after
the replacement of the gas valve
,
after conversion from methane gas to LPG
or vice versa
, or after a new regulation for inside-chimney pipes,
follow the
procedures described below.
The adjustment of the maximum and minimum output, maximum heating and slow
ignition must be made in the sequence indicated, and by qualified personnel only
:
power up the boiler
set the parameters
306
minimum fan speed
307
maximum fan speed
308
slow ignition
309
maximum fan speed for heating
table 3
MAX. NO. FAN
ROTATIONS
METHANE GAS
(G20)
LPG
(G31)
25C f CH - DHW
7.000-8.700
6.900-8.500
rpm
30C f CH - DHW
7.400-8.700
7.400-8.700
rpm
table 4
MIN. NO. FAN
ROTATIONS
METHANE GAS
(G20)
LPG
(G31)
25C f
1.500
2.050
rpm
30C f
1.500
1.700
rpm
table 5
NO. FAN ROTATIONS
SLOW IGNITION
METHANE GAS
(G20)
LPG
(G31)
25C f - 30C f
5.500
5.500
rpm
3.10 Gas valve calibration
Run the CO
2
check procedure as explained in paragraph “3.8 Combustion
analysis”. If the values need to be modified, proceed as follows
:
check the CO
2
adjustment values with the casing closed
remove the casing as explained in paragraph “2.5 Removing the casing”
check the CO
2
adjustment values again, with the casing open
on the basis of the difference in values with the casing closed and open, if
necessary bring the CO
2
to the value shown in the table (1 and 2) - (minus)
the difference found. Example:
CO
2
value measured with the casing closed
= 8,5%
CO
2
value measured with the casing open
= 8,3%
value to be set for CO
2
with the casing open
= 8,8%
value to be set for CO
2
with the casing closed
= 9,0%
to adjust the CO
2
value:
rotate the max. power adjustment screw clockwise to reduce the value
,
or anti-clockwise to increase it
rotate the min. power adjustment screw clockwise to increase the value
,
or anti-clockwise to reduce it
with the casing open and after adjusting the CO
2
value at the minimum
power, check the adjustment of the
CO
2
at the maximum power again
after completing the adjustments, replace the casing and check the
CO
2
corresponds to the value shown in the table 1 and 2.
CO
2
-
CO
2
+
Maximum output
adjustment screw
Maximum output
adjustment screw
3.11 Gas conversion
Conversion from the gas of one family to the gas of another family can be
done easily even when the boiler is already installed.
This operation must be carried out by professionally qualified personnel. The
boiler is designed to operate with methane gas (G20) or LPG (G31) according
to the product label. The boiler can be transformed to LPG or to methane gas
(G20) by means of special kits.
For disassembly refer to instructions below:
disconnect the boiler from the electricity supply and turn off the gas tap
remove the casing as explained in paragraph “2.5 Removing the casing”
release the instrument panel and rotate it forwards
unscrew the ramp nut from the gas valve and rotate the ramp so as to have
access to the gas nozzle (
B
) in the outlet fitting
remove the nozzle (
B
) and replace it with the one from the kit
