DE DIETRICH VIVADENS MCR 24_28 BIC - Manual (Page 28)

7 Technical specifications
7.1 Technical specifications
MCR BIC
Boiler
Heating mode
Nominal useful output 40/30 (min / max) kW 6.3 /25.3
Nominal useful output 80/60 (min / max) kW 5.5 / 23.6
Nominal input power kW 24
Minimum input power kW 5.8
Domestic hot water mode Nominal useful output kW 27.4
Nominal input power kW 28
Minimum input power kW 5.8
Gas flow rate at nominal output (15 °C -
1013 mbar)
Natural gas H (G20)
m
3
/h
2.4
Natural gas L (G25) m 3 /h 2.8
Propane (G31) Kg/h 1.9
LHV efficiency 100% of nominal output and average water
temperature in the boiler of 70°C
% 98.3
LHV efficiency 100% of nominal output and return temperature of
30°C
% 104.4
LHV efficiency (92/42/EEC Gas Appliance
Directive)
30% of nominal output and return temperature of
30°C
% 108.7
HHV efficiency 100% of nominal output and average water
temperature in the boiler of 70°C
% 88.5
HHV efficiency 100% of nominal output and return temperature of
30°C
% 94
HHV efficiency (92/42/EEC Gas Appliance
Directive)
30% of nominal output and return temperature of
30°C
% 97.9
Maximum temperature (Safety thermostat cut-off) °C 110
Stand-by losses (ΔT = 30 °C) W 30
Losses through the outer casing % 1.1
Water content litres 1.8
Weight empty, without mounting frame, without front cover kg 61
Heating circuit
Nominal water flow (ΔT = 20 K)
m 3 /h 1.03
Manometric height (ΔT = 20 K) mbar (1) > 200
Flow temperature °C 75
Maximum pressure bar 3
Expansion vessel litres 8
Initial pressure of the expansion vessel bar 1
Minimum operating pressure bar 0.8
Domestic hot water circuit
Instruction set outlet temperature
°C 60
Specific hot water flow (ΔT = 30 K) (2) litres per min. 18
Nominal max cold water pressure (2) bar 8
(1) 1 mbar = 100 Pa, 1 daPa = 1 mmWG
(2) Cold water inlet temperature: 10 °C
7. Technical specifications MCR 24/28 BIC
27 170513 - 300024112-001-01