41
59970LTGBW7H025a
59970LTGBW7H025
3.1.4 Checking the combustion
•
Measure the O
2
/CO
2
percentage and the flue gas tempera-
ture at the flue gas sample point.
Do this as follows:
- heat the water temperature in the boiler to approx. 70°C;
- unscrew the top of the flue gas point of measurement;
- measure the O
2
/CO
2
percentage and compare this to the
check values in
table 09.
Ensure that the analysing probe has a gas tight seal in the
sampling point with the probe end in the centre of the flue
duct.
Checking values O
2
/CO
2
for natural gas H / L
Boilertype
Fan speed (rpm)
O
2
CO
2
Full load
h3
Part load
L3
%
%
18v
ca. 3500
ca. 1300
5,2
± 0.2
8.8
± 0.3
table 09 checking values O
2
/CO
2
(front panel not fitted)
Checking values O
2
/CO
2
for LPG (propane) H / L
Boilertype
Fan speed (rpm)
O
2
CO
2
Full load
h3
Part load
L3
%
%
18v
ca. 3200
ca. 2000
5.1
± 0.2
10.5
± 0.3
table 10 Checking values O
2
/CO
2
(front panel not fitted)
The O
2
/CO
2
- values
in table 09
are
checking
values. For
setting
values see
table 04, table 05, table 06 and table 07
If the flue gas analysis readings are within the values
in table
09
the boiler combustion is OK. However, if the readings are
outside the given values, then adjust the gas air ratio control to
the given values,
see table 04 and table 06 in par.2.10.3
.
If the adjustments cannot achieve the mentioned values, the
boiler will require a full service please refer to the maintenance
instructions in
par. 3.2.
•
Check the flame via the inspection glass; in full load the
flame should be stable with an even blue colour and in part
load should be stable with an even orange colour.
