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5. TECHNICAL DATA AND CHARACTERISTICS
5.1 Dimensions, connections and main components
44
275
273
fig. 25 - Front view
126
11
B
fig. 26 - Rear View
C
10
11
fig. 27 - Side view
18
EN
500
246
E
10
A
7
36
630
44
275
cod. 3540Z410 - 03/2011 (Rev.00)
Table. 3
ERA MD 20
ERA MD 30
ERA MD 40
7
Gas inlet
10
System delivery
11
System return
44
Gas valve
126
Fume thermostat
246
Pressure transducer
273
Pilot light assembly
275
Heating system drain cock
5.2 Loss of head
Pressure loss water side
60
50
40
30
20
10
0
2000
2500
3000
fig. 28 - Pressure loss
to
mbar
B
Flowrate l/h
5.3 Technical data table
Table. 4
Models
Number of elements
Max. heating capacity
Min. heating capacity
Max. heat output in heating
Min. heat output in heating
Efficiency Pmax (80-60°C)
Efficiency 30%
Efficiency class Directive 92/42 EC
NOx emission class
Burner nozzles G20
Gas supply pressure G20
Gas baffle G20
Max. pressure downstream of gas valve G20
Min. pressure downstream of gas valve G20
Max. gas delivery G20
Min. gas delivery G20
Burner nozzles G25
Gas supply pressure G25
Gas baffle G25
Max. pressure downstream of gas valve G25
Min. pressure downstream of gas valve G25
Max. gas delivery G25
Min. gas delivery G25
Burner nozzles G31
Gas supply pressure G31
Gas baffle G31
Max. gas pressure at burner G31
Min. gas pressure at burner G31
Max. gas delivery G31
Min. gas delivery G31
Max. working pressure in heating
Min. working pressure in heating
Max. heating temperature
Heating water content
Protection rating
Power supply voltage
Electrical power input
Empty weight
ERA MD
A
B
C
mm
mm
mm
159
162
70
116
119
80
73
76
80
3500
4000
4500
5000
B
ERA MD 20 ERA MD 30 ERA MD 40
kW
3
4
5
kW
21.5
32.2
42.9
kW
10.1
14.9
19.7
kW
20.0
30.2
40.1
kW
9.1
13.5
17.7
%
93.1
93.7
93.5
%
92.7
91.8
92.5
2
2
2
no.x Ø
2x2.60
3x2.60
4x2.60
mbar
20
20
20
Ø mm
5.60
6.60
7.60
mbar
16
16
16
mbar
4
4
4
3
2.28
3.41
4.54
m
/h
3
1.07
1.58
2.08
m
/h
no.x Ø
2x2.60
3x2.60
4x2.60
mbar
25
25
25
Ø mm
5.60
6.60
7.60
mbar
20
20
20
mbar
5
5
5
3
2.65
3.96
5.28
m
/h
3
1.24
1.83
2.42
m
/h
no.x Ø
2x1.65
3x1.65
4x1.65
mbar
37
37
37
Ø mm
No baffle
mbar
35
35
35
mbar
7.7
7.7
7.7
kg/h
1.68
2.52
3.36
kg/h
0.79
1.17
1.54
bar
6
6
6
bar
0.8
0.8
0.8
°C
95
95
95
L
9.1
11.6
14.1
IP
X0D
X0D
X0D
V/Hz
230/50
230/50
230/50
W
15
15
15
kg
106
136
164
E
Ø mm
111
151
151
5500
(Q)
(Q)
(P)
(P)
(PMS)
(tmax)
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