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9.12 Chimney Sweep Function
For correct boiler operation, content of (CO2 - O2) in the combustion flue must be within tolerances indicated in
table below.
Combustion
Table
Maximum
Nominal value
power
Permitted
(100%)
value
Nominal value
Ignition
Permitted
power (*)
value
Nominal value
Minimum
Permitted
power (0%)
value
(*)
Automatically calculated from the PCB
For correct boiler operation, content of (CO
combustion flue must be within tolerances indicated in
table above.
Chimney Sweep Function enables boiler firing rate to be
controlled for diagnostic purposes.
A. Press and hold
seconds. When the function is enabled, displays
shows "On" for few seconds followed by program
row "303" alternating with % of boiler power.
B. Press
or
to gradually adjust power
(increments of 1%).
C. To exit press both buttons
at least 6 seconds.
D. If value of CO
-O
2
2
and their relative distances. See Figure 11-1.
If necessary, replace electrodes and position them
correctly. See Section 11 General Maintenance,
Figure 11-1 Electrodes
If problem persists, use "COMBUSTION
ADJUSTMENT FUNCTION (CO
If problem continues to persist, follow directions in
Section 9.8 Automatic Calibration Function,
and Section 9.9 Manual Calibration Function.
NOTICE
• Press
to display instantaneous flow
temperature for 15 seconds.
• Use a regularly calibrated combustion analyzer
for combustion analysis.
• During normal operation boiler performs
combustion control cycles. In this phase CO
values higher than 400 ppm can occur for brief
periods of time.
9 - START UP PROCEDURE
DCBF-75 & 100
DCCF-115 & 150
CO2 %
O2 %
9.0
4.9
8.5
9.5
4.0 - 5.7
–
8.7
5.4
8.2 - 9.3
4.3 – 6.3
8.8
5.2
8.2 - 9.3
4.6 – 6.3
- O
2
2
and
at the same time for 6
and
together for
is different, check the electrodes
%)".
2
Gas A (Natural Gas)
DCBF-125
CO2 %
O2 %
8.7
5.4
8.2 – 9.3
4.3 – 6.3
8.7
5.4
8.2 – 9.3
4.3 – 6.3
8.8
5.2
8.2 – 9.3
4.3 – 6.3
9.13 Combustion Adjustment Function (CO
) in the
This function sets out to partially adjust the value of
CO
%. Use the following procedure:
2
1.
Press buttons
seconds. When the function is enabled, displays
shows "On" for a few seconds followed by program
row "304" alternated with the % of boiler power;
2.
After burner is lit, boiler shows a flame icon
alternately "304" and current firing power. Press
CH+ until "304" & "100" is displayed. It is now
possible to partially adjust CO2 value at 100%.
3.
If adjustment is needed Press
blinking flame icon
"00".
4.
Press
(from -0.3% to +0.3%).
5.
Press
show on display again. Boiler continues operating at
maximum DHW power.
6.
After saving the new value (step 5 above), press
to set boiler to ignition power. Wait for value
of CO
procedure (power value is a number <> 100 and
<> 0). Repeat step 5 to save.
7.
Press
for value of CO
(power value = 00);
8.
Exit function by pressing
least 6 seconds, see step 1.
53
DCBF-165
DCCF-205
CO2 %
O2 %
9.0
4.9
8.5 – 9.5
4.0 – 5.7
8.7
5.4
8.2 – 9.3
4.3 – 6.3
9.0
4.9
8.5 – 9.5
4.0 – 5.7
and
together for at least 6
and alternately "304" and
to raise or lower the amount of CO
to save new value. Power value "100" will
to stabilize. Adjust as described in step 4 of
2
to adjust boiler to minimum power. Wait
to stabilize. Go to step 4 to adjust
2
240013509 REV A, [03/15/2022]
Gas E (LPG)
All
CO2 %
O2 %
10.0
5.7
9.5 – 10.5
4.9 – 6.4
10.8
4.8
10.3 - 11.3
3.7 – 5.2
9.8
6.0
9.3 – 10.3
5.2 – 6.7
%)
2
and
, display shows a
2
and
together for at
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