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Commissioning, inspection, maintenance
Checking the flue pipe for tightness
Adjusting the burner
The combustion heating output of the burner must not
exceed the permissible combustion heating output of
the boiler. Adjust the maximum gas or oil throughput of
the burner to the rated boiler heating output.
Use of low-NO
burners
x
Incorrectly adjusted low-NO
els of vibration and resonance during operation. This
phenomenon can result in damage to the thermal insu-
lation in the area of the boiler door/doors, the cleaning
aperture covers and the flue gas collectors.
The information and values in the tables relate to the
following general conditions:
■
O
content in dry flue gas
2
–
For natural gas: 3.0
%
For EL fuel oil: 3.0
–
%
Flow/return temperature: 120/80 °C
■
■
100
load
%
Max. pressure drop on the flue gas side
Boiler type M70A
Boiler size
Rated heating output
For natural gas
■
For EL fuel oil
■
Max. pressure drop on the
flue gas side
For natural gas
■
For fuel oil EL
■
Tab. 8
Boiler type M72B
Boiler size
Rated heating output
For natural gas
■
For EL fuel oil
■
Max. pressure drop
on the flue gas side
For natural gas
■
For fuel oil EL
■
Tab. 9
Boiler type M74B
Boiler size
Rated heating output
For natural gas
■
For EL fuel oil
■
22
burners increase the lev-
x
by vol.
by vol.
1
MW
0.35
MW
0.35
mbar
4.2
mbar
3.8
1
2
3
MW 2.30 2.60 2.90 3.20 3.60 4.00 4.50 5.20 6.00
MW 2.30 2.60 2.90 3.20 3.60 4.00 4.50 5.20 6.00
mbar
8.9
9.4 10.1 10.9 13.2 13.3 14.1 15.8 17.3
mbar
8.5
8.9
9.7 10.4 12.7 12.8 13.5 15.2 16.6
1
MW
7.90
MW
7.76
Burner operating and service instructions
To prevent vibrations and resonances:
■
Adjust the burner correctly.
■
Prevent "hard flames".
■
Carefully monitor the operation of the burner during
the 1st year of operation.
■
Rectify operating faults immediately.
■
Installation altitude: < 500 m above sea level
■
Combustion air temperature: 25 °C
Applicable to M72B:
■
O
content in dry flue gas
2
For natural gas: 2.1
–
For EL fuel oil: 2.7
–
2
3
4
0.48
0.65
0.85
1.10
0.48
0.65
0.85
1.10
4.5
8.8
10.5
11.6
4.1
7.9
9.5
10.5
4
5
6
2
3
4
8.90
9.90
11.80
13.80
8.41
9.01
10.25
11.46
by vol.
%
by vol.
%
5
6
7
1.30
1.60
2.10
1.30
1.60
2.10
12.2
12.2
14.0
11.1
11.0
12.6
7
8
9
A
6.75 8.00 8.80
6.75 8.00 8.55
18.2 13.8 12.8
17.4 13.1
5
6
7
15.75
17.75
19.75
12.93
14.00
15.83
8
9
2.60
2.60
13.2
11.9
B
C
11.1
8
9
21.00
16.70
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