Rendimax N EL
13
7.03 output variability characteristics
The heat rate of the boiler furnace and, as a consequence, the heat output delivered to the central heating water,
can be adjusted by simply adjusting the main burner assembly via the gas valve. The diagrams in figs. 4a and 4b
indicate the variation in heat output delivered to the water in relation to the adjustment of the operating pressure
of the burner assembly. The possibility of adjusting the boiler output to the effective needs of the central heating
system, means above all reductions in heat loss and thus savings in gas consumption. Furthermore, with the output
variation feature, governed by the relative standards, the boiler maintains near constant thermal efficiency values
and combustion characteristics.
The instructions for adjusting the gas valve are provided in chapter 11.
Output variability on natural gas (G20)
Output variability on L.P.G. (G31)
1 =
Model 16
2 =
Model 23
3 =
Model 30
4 =
Model 36
1 =
Model 16
2 =
Model 23
3 =
Model 30
4 =
Model 36
Fig. 4b
Fig. 4a
14
17
18
19
20
21
22
23
24
25
26
27
28
29
30
16
31
15
14
13
12
11
15
kW
10
12
14
kcal/h
x 1000
9
11
13
29
37
36
35
34
33
32
31
30
28
27
26
25
20
19
18
17
16
mbar
6
2
3
4
5
7
8
9
10
11
12
13
21
22
23
24
16
15
1
2
3
4
35
25
30
1
mbar
10
29
13
11
9
15
20
27
28
30
kcal|h
x 1000
kW
26
14
12
10
31
32
33
34
25
35
36
37
15
11
12
13
14
15
31
16
30
29
28
27
26
25
24
23
22
21
20
19
18
17
20
19
21
22
18
23
24
17
16
2
3
4
