S-CB
+
Boiler Range Manual
93
14
ADJUSTING AND SETTING THE BURNER
Before carrying out any adjusting of the burner, carefully read this complete chapter.
14.1 Introduction
The burner must always be adjusted in the next situations:
A.
- A new boiler is installed
- As part of a service/maintenance check, in case the CO
2
values turn out to be incorrect
Adjustment procedures for situation
A
are described in
B.
- The gas control safety valve has been (re)placed
- Another type of gas is applied: gas conversion
Adjustment procedures for situation
B
are described in
In either of the four cases described in
A
and
B
, always check the gas/air ratio of the combustion figure (CO
2
) at
maximum and minimum input. First set the boiler at maximum load and subsequently at minimum load, and repeat
if necessary.
Gas types and valves
The right type of valve must be selected, depending on the gas type. Gas types G20, G25 and G31 are commonly
used; the boilers are standard equipped with the A+C-class valves required for these types of gas.
Poland
Gas types G27 and G2.350 are Lw and Ls gases, used in some parts of Poland. For Ls gas G2.350, the boilers S-
CB
+
80, S-CB
+
100, S-CB
+
150 and S-CB
+
180 must be equipped with B+J-class valves, see table 3 and see the
pictures on page 96.
Set-up of this chapter:
First, all necessary values are given in three tables in § 14.1.1. A drawing of the gas valve(s) and setting screws is
given in § 14.1.2 on the next page. In § 14.1.4 a general scheme, conform which the adjustments must be carried
out, is presented in table form. After that, in §§ 14.2 and 14.3, a thorough description is given of how to proceed in
cases
A
and
B
respectively. In § 14.4, finally, two main procedures used in the previous sections are described in
detail.
14.1.1
A
DJUSTMENT TABLES
For adjustment use CO
2
tolerance of ± 0,1% (for O
2
this is ± 0,2%).
For Ls gas G2.350, used in parts of Poland, a B+J valve must be installed in the S-CB
+
80, S-CB
+
100, S-
CB
+
150 and S-CB
+
180 boiler. See also page 96.
Table 1
gas type:
boiler type
load
output
G20
1
,
G25
1
,
G27
1
,
G2.350
1
propane
3
G31
1
butane (B/P)
3
G30
1
/G31
1
S-CB
+
60-120
2
max. load
CO
2
(%)
9,0
10,3
10,4
O
2
(%)
4,8
5,2
5,3
min. load
CO
2
(%)
8,7
9,3
9,3
O
2
(%)
5,3
6,7
6,9
S-CB
+
150
2
max. load
CO
2
(%)
9,0
10,4
10,5
O
2
(%)
4,8
5,0
5,2
min. load
CO
2
(%)
8,7
9,3
9,3
O
2
(%)
5,3
6,7
6,9
S-CB
+
180
2
max. load
CO
2
(%)
9,0
10,5
10,6
O
2
(%)
4,8
4,7
4,9
min. load
CO
2
(%)
8,7
9,3
9,3
O
2
(%)
5,3
6,7
6,9
1
Cf. EN437.
(G27 and G2.350 for Poland)
2
All values are measured without boiler door
3
Fan settings must be changed by altering parameter P4BD (display D8) (only by a skilled mechanic)
Summary of Contents for S-CB+ Series
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