E93.1001EN.C Manual CD
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94
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 water heater is installed
- As part of a service/maintenance check, in case the CO
2
values turn out to be incorrect
.
B.
- The gas control safety valve has been (re)placed
- Another type of gas is applied: gas conversion
Adjustment procedures for situation A are described in § 14.2 And for situation B § 14.3
.
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 water heater at max. load and subsequently at min. load, and repeat if
necessary.
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 § 14.1.3. In § 14.1.5. a general scheme, conform which the adjustments must be carried out, is pre-
sented in table form. In §§
14.2.
and
14.3.
, a 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.
A
DJUSTMENT TABLES
Table 1: CO
2
values for maximum and minimum load.
2)
1 Cf. EN437.
2 All values measured without front door. The CO
2
/ O
2
values should always be between the values set in
this table. Nominal values can be found in Technical specifications datasheet page.
3 Fan settings must be changed by altering parameter P4BD (display D8). (only by a skilled mechanic).
4 B/P: Propane/butane mixture.
Using propane or butane/propane mixtures (B/P), maximum fan speed needs to be reduced by chang-
ing parameter P4BD.
gas type
1)
CO
2
[%]
O
2
[%]
G20, G25.3
water heater type
max load
min load
max load
min load
CD
+
80-180
9,0 - 9,2
8,5 - 8,7
4,5 - 4,8
5,4 - 5,7
CO
2
[%]
O
2
[%]
propane G31
3)
water heater type
max load
min load
max load
min load
CD
+
80-120
10,3 - 10,5
9,1 – 9,3
4,9 - 5,2
6,7 – 7,0
CD
+
150
10,4 - 10,6
4,7 - 5,0
CD
+
180
10,5 - 10,7
4,6 - 4,9
CO
2
[%]
O
2
[%]
B/P
3)
4)
G30/ G31
water heater type
max load
min load
max load
min load
CD
+
80-120
10,4 - 10,6
9,1 – 9,3
5,1 - 5,4
7,0 – 7,3
CD
+
150
10,5 - 10,7
4,9 - 5,2
CD
+
180
10,6 - 10,8
4,8 - 5,1
