Viessmann Vitomax HW Series Installation Instructions Manual page 16

Adjusting the burner
Boiler size
10 bar
16 bar
Corruga-
■
ted pipe,
internal
16 bar d1
7
Corruga-
■
ted pipe,
average
16 bar d2
7
Cone,
■
min. in-
ternal
7
Lengths
Reversing chamber
depth
Burner connections
Max. flame head
■
7
Minimum flame
■
head length
Combustion chamber
volume (average value)
Flame tube
■
Relative to flame tube
■
length a and reversing
chamber depth b
Max. pressure drop on
the flue gas side
For natural gas
■
For EL fuel oil
■
Tab. 15
Boiler size
Boiler water ca-
3
pacity m
Tab. 16
Boiler size
Flue gas volume m 3
Tab. 17
M74B
Boiler size
Rated heating output
For natural gas
■
For EL fuel oil
■
Permissible combustion
heating output *12
In accordance with EN 12953, the internal diameter of the flame tube limits the maximum combustion heating output for oil
*12
operation.
16
(cont.)
1 2
mm 797 797
mm 785 785
mm
– –
mm
– –
f mm 617 617
a mm 2630 2630 2900 2900 3240 3240 3660 3660 4220 4220 4830
g mm
b mm
c mm 420 420
e mm
1.33 1.33 1.65 1.65 2.07 2.07 2.70 2.70 3.79 3.79 4.97
m 3
3
m 1.58 1.58 1.93 1.93 2.38 2.38 3.07 3.07 4.24 4.24 5.49
mbar 8.9 9.4 10.1 10.9 13.2 13.3 14.1 15.8 17.3 18.2 13.8
mbar 8.5 8.9
1 2 3
5.01 4.90 5.69
1 2 3
2.89 2.98 3.57
1
MW 7.90
MW 7.76
3 4 5 6
845 845 893 893
835 835 885 885
– – – –
– – – –
667 667 717 717
800
500
420 420 520 520
360
9.7 10.4 12.7 12.8 13.5 15.2 16.6 17.4 13.1
4 5 6
5.60 7.17 7.00 8.93
4 5 6
3.64 4.42 4.56 5.92
2 3 4
8.90 9.90 11.80
8.41 9.01 10.25
7 8 9
968 968 1064 1064 1135
– – –
950 950 1050 1050 1125
1000 1000 1100 1100 1175
792 792 892 892
520 520 590 590
7 8 9 A
8.70 10.83 10.50 16.03
7 8 9 A
6.10 7.74 8.01 10.60
5 6 7
13.80 15.75 17.75
11.46 12.93 14.00
A B C
1135
– – –
1125
1175
971 971
4830
710 710
4.97
5.49
12.8
11.1
B C
15.43
B C
11.10
8 9
19.75 21.00
15.83 16.70