6
ADJUSTING THE GAS VALVE
- Turn the function selector to OFF/RESET (the display
shows “- -”)
- Pull off all 3 control knobs (DHW temperature, function
selector and CH temperature).
- Unscrew the four screws (A) and remove the front trim
(B).
- Press the combustion analysis button (CO).
- Wait for the burner to ignite. The display will read out
“CO” and the boiler will start functioning at maximum
central heating power. The chimney sweep function
remains active for a maximum time of 15 minutes. If the
central heating flow reaches a temperature of 95°C, the
burner shuts down. The burner will re-ignite when cen-
tral heating flow temperature drops below 75°C.
- Remove the cap and insert the combustion analysis
probe.
- Turn the HTG trimmer clockwise until maximum fan
speed is reached (see table).
- Check the CO
2
content. If the value is not as speci-
fied in the table, adjust the gas valve maximum screw
accordingly.
- Turn the HTG trimmer anticlockwise until minimum
speed is reached (see table).
- Check the CO
2
content. If the value is not as specified
in the table, adjust the gas valve minimum screw accor-
dingly.
- Return the HTG trimmer to the correct Max CH setting
(see table).
- Turn the function selector to exit chimney sweep mode.
- Remove the combustion analysis probe and replace
the cap.
- Fit the front trim (B) and secure with the four screws (A).
- Push the 3 control knobs back on to their pins in the
front trim.
The combustion analysis function stops automatically if
the control card detects an error condition. If an error
occurs during combustion analysis, proceed as follows
to perform a reset. Turn the function selector to “
}
”, and
then to “
{
”, and then to the desired function.
Labels
- Remove the G20 label from the outside of the boiler
casing.
- Apply the G31 label to the inside of the casing, covering
the old G20 label.
MAXIMUM FAN SPEED
METHANE (G20)
PROPANE (G31)
12 ISCN
51
51
rpm
21 ISCN
55
60
rpm
MINIMUM FAN SPEED
METHANE (G20)
PROPANE (G31)
12 ISCN
13
17
rpm
21 ISCN
13
13
rpm
MAX CO
2
VALUES
METHANE (G20)
PROPANE (G31)
12 ISCN
9,0
10,0
%
21 ISCN
9,0
10,0
%
MIN CO
2
VALUES
METHANE (G20)
PROPANE (G31)
12 ISCN
9,0
10,0
%
21 ISCN
9,0
10,0
%
GAS SUPPLY PRESSURE:
COUNTRY OF DESTINATION:
GB
Country of destination:
Type of boiler:
Boiler category:
II2H3P
Gas supply pressures:
G20
G31
20 mbar
37 mbar
Manufacturer setting:
G20 - 20 mbar
IMPORTANT!
Read the instruction manual thoroughly
before installing and starting up the boiler.
B23P, B53P, C13, C33, C43,
C63, C83, C13x, C33x,
C43x, C53x, C63x, C83x
GB
0
bar
4
1
3
2
°C
0
120
20
100
40
80
60
Max. gas
power screw
Max. gas
power screw
Summary of Contents for B23P
Page 2: ......
