20
0
30
20
10
∆
p aria mm H
2
O
P
o
tenza t
er
mica kW
25
20
10
15
50
40
60
5
30
50-30
°
C
35
70
80-60
°
C
0
30
20
10
∆
p aria mm H
2
O
P
o
tenza t
er
mica kW
25
20
10
15
50
40
60
5
30
50-30
°
C
35
70
80-60
°
C
G20
G31
4.3.1
Diagram illustrating heat output in relation to “air
∆
p”
TABLE 4/a - G20
*
Air
∆
p is measured during boiler operation using a differential pressure gauge connected to the ventilator intake.
** The gas consumptions refer to the calorific value at standard conditions at 15°C - 1013 mbar.
Variable heat output
Air
∆
p*
Gas consum.**
(80-60°C) (50-30°C)
(80-60°C) (50-30°C)
G20
kW
kW
mm H
2
O
mm H
2
O
m
3
/h st
29,3
32,0
63,8
66,4
3,17
22,9
25,0
45,0
45,0
2,48
16,1
17,6
25,0
25,0
1,75
10,4
11,4
8,4
9,2
1,14
TABLE 4/b - G31
Variable heat output
Air
∆
p*
Gas consum.**
(80-60°C) (50-30°C)
(80-60°C) (50-30°C)
G31
kW
kW
mm H
2
O
mm H
2
O
kg/h
29,3
32,0
68,4
70,4
1,52
21,8
23,4
45,0
45,0
1,19
15,4
16,6
25,0
25,0
0,84
10,4
11,4
9,2
9,5
0,55
Fig. 22
Heat
out
out
(kW)
Air
∆
p mm H
2
O
Heat
out
out
(kW)
∆
p de aire mm H
2
O