Technical specifications, 7 technical specifications, 1 technical specifications – DE DIETRICH VIVADENS MCR 24, MCR .._.. MI User Manual
Page 29
7 Technical specifications
7.1
Technical specifications
Boiler type
MCR 24
MCR 24/28
MI
MCR 30/35
MI
MCR 34/39
MI
Heating mode
Nominal useful output 40/30
(min / max)
kW
6.3 /25
6.3 /25
6.6 /31.3
6.8 /35.5
Nominal useful output 80/60
(min / max)
kW
5.5 / 23.6 5.5 / 23.6
5.7 / 29.5
5.9 / 33.3
Nominal input power
kW
24
24/28
30/35
34/39
Minimum input power
kW
5.8
5.8
6.1
6.3
Domestic hot water mode Nominal useful output
kW
-
27.4
34.3
38.2
Nominal input power
kW
24
24/28
30/35
34/39
Minimum input power
kW
5.8
5.8
6.1
6.3
Gas flow rate at nominal
output (15 °C -
1013 mbar)
Natural gas H (G20)
m
3
/h
2.4
2.4
3.5
3.9
Natural gas L (G25)
m
3
/h
2.8
2.8
4.1
4.5
Propane (G31)
Kg/h
1.9
1.9
2.7
3.0
LHV efficiency
100% of nominal output and
average water temperature in
the boiler of 70°C
%
98.3
98.3
98.2
98
100% of nominal output and
return temperature of 30°C
%
104.4
104.4
104.4
104.4
30% of nominal output and
return temperature of 30°C
%
108.7
108.7
109.7
110.5
HHV efficiency
100% of nominal output and
average water temperature in
the boiler of 70°C
%
88.5
88.5
88.4
88.2
100% of nominal output and
return temperature of 30°C
%
94
94
94
94
30% of nominal output and
return temperature of 30°C
%
97.9
97.9
98.8
99.5
Maximum temperature (Safety thermostat cut-off)
°C
110
110
110
110
Stand-by losses (ΔT = 30 °C)
W
30
30
29
28
Losses through the outer casing
%
1.1
1.1
0.9
0.5
Water content
litres
1.7
1.8
2
2.2
Weight empty, without mounting frame, without front cover kg
29
30.5
32
31.5
Heating circuit
Nominal water flow (ΔT = 20 K)
m
3
/h
1.03
1.03
1.29
1.47
Manometric height (ΔT = 20 K)
mbar
(1)
> 250
> 250
> 200
> 200
Flow temperature
°C
75/85
75/85
75
75
Maximum pressure
bar
3
3
3
3
Expansion vessel
litres
8
8
8
-
Initial pressure of the expansion vessel
bar
1
1
1
1
Minimum operating pressure
bar
0.8
0.8
0.8
0.8
Domestic hot water circuit
Instruction set outlet temperature
°C
55
55
55
55
(1) 1 mbar = 100 Pa, 1 daPa = 1 mmWG
(2) Cold water inlet temperature: 10 °C
MCR 24 MCR 24/28 MI MCR 30/35 MI MCR 34/39 MI
7. Technical specifications
160513 - 300015874-001-01
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