14
2.6 - GENERAL FEATUREs swG P
OPERATING DATA ACCORDING TO UNI 10348 swG P
Attention: should the boilers be used to heat systems at low temperature (e.g. radiant panels), a mixer valve is required to avoid
condensation forming.
SWG
A 23 P
C 24 P
C 28 P
C 32 P
Maximum thermal flow rate
kW
25.5
26.5
30.1
34.5
Minimum thermal flow rate
kW
11.5
11.5
11.5
13.5
Effective nominal output
kW
22.9
24.7
28.1
32.3
Minimum effective output
kW
9.9
10.1
10.2
12.2
Effective efficiency at nominal load (100%)
%
89.8
93.05
93.21
93.5
Effective efficiency required (100%)
%
89.72
92.78
92.90
93.02
Effective efficiency at 30% load
%
89.43
90.43
90.42
90.42
Effective efficiency required (30%)
%
87.08
90.18
90.34
90.53
Number of stars (according to 92/42 EEC)
no.
Combustion
efficiency with nominal load (100%)
%
91.36
93.21
94.6
94.57
Combustion efficiency with reduced load
%
88.5
88.06
89.52
88.76
Heat loss at casing (min.-max.)
%
2.0- 1.6
0.17 - 0.16
0.77-1.40
1.07-1.35
(*) Flue gas temperature tf-ta (max.)
%
95.5
119.3
96.3
101.4
Flue gas mass flow rate (min.-max)
g/s
19.1-21.2
14.21-13.74
15.17-15.35
18.12-16.8
Excess λ air
%
140.7
45.15
42.56
35.34
CO
2
%
2.2-4.6
3.0-7.8
2.8-8.0
2.75-8.4
NOx
(Weighted value according to EN 297/A3 or EN 483)
mg/kWh 189.2
184.16
186.00
164.05
NOx Class
2
2
2
2
Heat loss at chimney
with burner on (min.-max.)
%
8.6-11.5
11.94-6.79
5.40-10.48
5.40-11.2
Heat loss at chimney with burner off
%
0.657
0.256
0.321
0.280
(*) Room Temperature = 20°C
SWG
A 23 P
C 24 P
C 28 P
C 32 P
Appliance category
II
2H3P
II
2H3P
II
2H3P
II
2H3P
Minimum heat. circuit output (∆t 20 °C)
l/min
7.1
7.2
7.3
8.7
Minimum heating circuit pressure
bar
0.5
0.5
0.5
0.5
Maximum heating circuit pressure
bar
3
3
3
3
Primary circuit content
l
3
3
3.5
3.5
Maximum operating temperature in heat.
°C
78
78
78
78
Minimum operating temperature in heat.
°C
45
45
45
45
Expansion vessel total capacity
l
6
6
8
10
Expansion vessel pre-load
bar
1
1
1
1
Maximum system capacity
(max temp. calc. of 82°C)
l
138
138
184
230
Minimum domestic hot water circuit flow rate
l/min.
2.5
2.5
2.5
2.5
Minimum domestic hot water circuit pressure
bar
0.5
0.5
0.5
0.5
Maximum domestic hot water circuit pressure
bar
6
6
6
6
Domestic hot water specific flow rate (∆t 30 °C)
l/min.
11
12
13.5
15.5
Domestic hot water flow rate limiter
l/min.
10
10
12
14
Production of D.H.W. in continuous operation with ∆t 45 K
l/min.
7.8
7.4
8.7
10.3
Production of D.H.W. in continuous operation with ∆t 40 K
l/min.
8.8
8.3
9.8
11.6
Production of D.H.W. in continuous operation with ∆t 35 K
l/min.
10.0
9.5
11.1
13.2
Production of D.H.W. in continuous operation with ∆t 30 K
l/min.
11.7
11.0
13.0
15.4
Production of D.H.W. in continuous operation with ∆t 25 K (*)
l/min.
14.1
13.2
15.6
18.5
Temperature adjustable in domestic hot water mode
°C
35-57
35-57
35-57
35-57
Voltage/Frequency electric power supply
V-Hz
230/50
230/50
230/50
230/50
Fuse on the power supply
A (F)
2
2
2
2
Maximum absorbed output
W
85
138
138
150
Protection rating
IP
X4D
X5D
X5D
X5D
Net weight
kg
28.6
30.1
35.2
36.2
Gross weight
kg
31.5
33
38.2
39.2
(*) mixed
