Biasi M275V.2024 SM, Service Manual

Page: 31 / 52

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GAS VALVE
13 Open at least one hot water tap fully.
Figure 11 .4
A
B
C
D
E
F G
14 To enter in the “programming mode” press at the same time
the 2 keys "F" and "G" (Figure 11.4) and hold in for 5 second
until the code P00 appears on the display, indicating entry
into “parameter P00” (Figure 11.5).
Figure 11 .5
bar
RESET
15 Scroll the various parameters using keys "A" or "B" (Figure
11.4) until the LCD display shows the code P06 , indicating
entry into “parameter P06” (Figure 11.6).
Figure 11 .6
bar
RESET
16 Press key "E" (Figure 11.4) to show the value of parameter
P06 on the LCD display (Figure 11.7).
Figure 11 .7
bar
RESET
17 Press E and the LCD display shows the number 01 , indicat-
ing activation of the “chimney sweep function” at minimum
output (Figure 11.8).
18 Press A (Figure 11.4) to confirm the value entered and acti -
vate the function.
Figure 11 .8
bar
RESET
19 Press F (Figure 11.4) to exit “programming mode” (Figure
11.9).
Figure 11 .9
bar
RESET
20 Allow the analyser to give a stable reading.
21 Read the CO
2
% value. It should be between:
Model BASICA Type gas CO
2
% value (range)
COND 24C
COND 28C
COND 32C
Natural (G20) 8,2 - 8,8
Propane (G31) 9,4 - 10,0
If the boiler starts up as expected, it is already with-
in the limits indicated; move on to checking the
maximum pressure .
Otherwise, follow the instructions below .
22 To calibrate the boiler CO
2
(gas pressure at the burner) un-
screw the protective brass cap "5" completely and turn the
underlying Ø 4 mm hex head socket screw Figure 11.2. Turn
it clockwise to increase the CO
2
.
Checking the maximum gas valve setting
23 To enter in the “programming mode” press at the same time
the 2 keys "F" and "G" (Figure 11.4) and hold in for 5 second
until the code P00 appears on the display, indicating entry
into “parameter P00” (Figure 11.10).
Figure 11 .10
bar
RESET
24 Scroll the various parameters using keys "A" or "B" (Figure
11.4) until the LCD display shows the code P06 , indicating
entry into “parameter P06” (Figure 11.11).
Figure 11 .11
bar
RESET
25 Press key "E" (Figure 11.4) to show the value of parameter
P06 on the LCD display (Figure 11.12).
Figure 11 .12
bar
RESET
26 Press E and the LCD display shows the number 02 , indicat-
ing activation of the “chimney sweep function” at maximum
DHW output (Figure 11.13).
27 Press A (Figure 11.4) to confirm the value entered and acti -