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CHECKING THE GAS SETTINGS
Check minimum burner pressure
• Enter "programming mode" by holding down
buttons 17 and 18 for 5 seconds at the same
time (Figure 7.2). The code P00 appears on
the display, indicating entry into "parameter
P00" (Figure 7.12).
Figure 7.12
• Scroll through the various parameters using
12 or 13 until the LCD display shows the
code P06, indicating entry into "parameter
P06" (Figure 7.13).
Figure 7.13
• Press 16 (Figure 7.2) to show the value of
parameter P06 on the LCD display (Figure
7.14).
Figure 7.14
• Press 15 and the LCD display shows the
number 01, indicating activation of the
"chimney sweep function" at minimum out-
put ().
• Press the 12 button (Figure 7.2) to confirm
the value entered and activate the function
(Figure 7.15).
- 50 -
RESET
bar
RESET
bar
RESET
bar
Figure 7.15
• Press the 17 button (Figure 7.2) to exit "pro-
gramming mode" (Figure 7.16).
Figure 7.16
• Compare the pressure value measured with
that shown in the "Minimum gas pressure at
burner" tables. To calibrate the pressure at
the boiler turn the plastic screws (28 MIN in
Figure 7.8) keeping the large brass hexago-
nal nut (28 MAX in Figure 7.8) of the mod-
ulating operator stationary (turning it clock-
wise increases the pressure).
M290E.24CM - Min. gas pressure at the burner
Methane G20
Propane G31
1 mbar corresponds to approx. 10 mm H20
Figure 7.17
M290E.28CM - Min. gas pressure at the burner
Methane G20
Propane G31
1 mbar corresponds to approx. 10 mm H20
Figure 7.18
RESET
bar
RESET
bar
Pa
220
mbar
2,2
Pa
650
mbar
6,5
Pa
180
mbar
1,8
Pa
640
mbar
6,4
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