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De Dietrich MCR-P 34-39 MI Manual

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7 Technical specifications
7.1 Technical specifications
Boiler type MCR-P 24 MCR-P
24/28 MI
MCR-P
30/35 MI
MCR-P
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
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
Casing losses W 57 57 57 57
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
Specific hot water flow (ΔT = 30 K)
(2)
litres per
min.
- 14 16 19
(1) 1 mbar = 100 Pa, 1 daPa = 1 mmWG
(2) Cold water inlet temperature: 10 °C
MCR-P 24 MCR-P 24/28 MI MCR-P 30/35 MI MCR-P 34/39 MI 7. Technical specifications
070513 - 127684-01
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