13
3. TECHNICAL CHARACTERISTICS
3.1 Technical Data
Model SRD
20
SRD 27
SRD 36
CE Certification
n°
0694BN3485
0694BN3485
0694BN3485
Appliance Type
B23p-B33-C13-C33-C43-C53-
C63-C83-C93
B23p-B33-C13-C33-C43-
C53-C63-C83-C93
B23p-B33-C13-C33-C43-
C53-C63-C83-C93
Appliance Category
II2H3B/P
II2H3B/P
II2H3B/P
Heat Input max
kW
18
25
34
D.H.W. Heat Input max
kW
23.5
25
34
Heat Input min
kW
4 (G20/G25) - 5.5 (G30/G31)
9
10
Heat Output max (50/30°)
kW
19.26
26.68
36.24
Efficiency 100% (full load 50/30°)
%
107
106.7
106.60
Efficiency 30% (partial load 50/30°)
%
108.1
106.3
107.90
Heat Output max - 80/60°C (Non condensing)
kW
17.69
24.6
33.42
Heat Output min - 80/60°C (Non condensing)
kW
3.9 (G20/G25) - 5.4 (G30/G31)
8.73
9.73
Efficiency 100% (full load 80/60°)
%
98.3
98.4
98.3
Efficiency 30% (partial load 80/60°)
%
101.1
100.1
100.7
GAS DIRECTIVE 92/42/EEC - Efficiency marking
stars
4
4
4
Central Heating circuit
Central Heating water temperature setting (min-max)
°C
30-80 / 25-40
30-80 / 25-40
30-80 / 25-40
Max. heating working temperature
°C
95
95
95
Expansion vessel capacity
litres
7
7
7
Max. working pressure (heating)
bar
3
3
3
Min. working pressure (heating)
bar
0.3
0.3
0.3
Domestic Hot Water circuit
D.H.W. temperature setting (min-max)
°C
35-60
35-60
35-60
Max. Hot water working pressure
bar
6
6
6
Min. Hot water working pressure
bar
0.5
0.5
0.5
D.H.W. flow rate at
Δ
T 30°C
litres/mn
11.53
12.25
16.63
Dimensions (Boiler casing size)
Width
mm
410
410
410
Height
mm
730
730
730
Depth
mm
285
285
310
Weight (net)
kg
38
40
44
Hydraulic connections
Central Heating Flow connection
Ø
3/4”
3/4”
3/4”
Central heating Return connection
Ø
3/4”
3/4”
3/4”
Cold water mains connection
Ø
1/2”
1/2”
1/2”
D. Hot water connection
Ø
1/2”
1/2”
1/2”
Gas connection
Ø
1/2”
1/2”
1/2”
Flue systems
Horizontal-Concentric flue system
Ø mm
60/100
60/100
80/125
Max. Flue length
m
6
5
8
Twin pipe flue system
Ø mm
80/80
80/80
80/80
Max. Flue length (from terminal to terminal)
m
50
50
50
Twin pipe flue system
Ø mm
60/60
60/60
60/60
Max. Flue length (from terminal to terminal)
m
30
30
30
Vertical-Concentric flue system
Ø mm
60/100
60/100
80/125
Max. Flue length
m
6
5
8
Gas Supply
Natural gas G 20
Inlet pressure
mbar
20
20
20
Gas consumption
m³/h
1.9
2.65
3.60
Butane G30
Inlet pressure
mbar
30
30
30
Gas consumption
kg/h
1.42
1.97
2.68
Propane G31
Inlet pressure
mbar
37
37
37
Gas consumption
kg/h
1.4
1.94
2.64
Electrical specifications
Power supply
V/Hz
230/50
230/50
230/50
Electrical power consumption
W
133
138
138
Electrical protection
IP
X4D
X4D
X4D
