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2.04 Central heating adjustment (not normally required)
To adjust boiler heat input (thus also regulating heat output to the central heating water) simply adjust the main
burner via the electronic control board (fi g. 4 and 5 and see paragraph 5.04 page 29).
The diagrams indicate the variation in heat output to the water as burner working pressure is varied.
Adjusting boiler output to the actual requirements of the central heating system will minimise boiler
cycling thus saving fuel, varying the output has virtually no effect on the efficiency and combustion
characteristics of the boiler.
iagram
ressures
and ut uts
ith
atural gas
14
13
12
11
10
9
8
7
6
5
4
3
2
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
kW
kcal/h
8
9 10 11 12 13 14 15 16 17 18 19 20 21
x 1000
ig. 4
2.0
mesti h t
ater aria ilit
The temperature of the domestic hot water can
be varied from 40 to 55
potentiometer.
iagram
d mesti h t
hara teristi s
by adjusting the boiler
ater r du ti n
ig.
iagram
ressures and ut uts
ith
r
ane
35
30
25
20
15
10
5
9 10 11 12 13 14 15 16 17
kW
kcal/h
8
9
10 11 12 13 14
X 1000
65
60
55
50
45
40
39
Tem erature
d mesti h t
0
3
4
5
6
7
8
l
d mesti h t
18 19 20 21 22 23
15 16 17
18 19 20
ig. 5
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
ater intake 1 °C
9
10
11
12
13
14
15
16
ater l min
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