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64
EN
5.6 Technical features
DESCRIPTION
DUETTO HE EV
25 35
CERTIFICATIONS
Country of intended installation IT – ES – PT – EN – FR – NL – HR – DK – EL
Fuel Diesel
PIN number 1312CS196R
Appliance classification B23P - C23P
DHW rated useful heat output kW 26,2 34,8
Class NO
x
(*) 3
HEATING PERFORMANCE
HEAT INPUT (**)
Nominal flow (Q
n
max) kW 26,2 34,8
HEAT OUTPUT
Nominal (80-60°C) (P
n
max) kW 25,1 33
Nominal (50-30°C) (P
n
max) kW 26,5 35,5
EFFICIENCY
Useful efficiency at 100% of load % 95,8 94,8
Useful efficiency at 30% of load % 103,3 104,9
Minimum combustion efficiency during operation
(Italian Pres. Dec. 311)
% 91,8 92
Losses after shutdown at 50°C (EN 303) W 68 103
ENERGY PERFORMANCE
Heating seasonal energy efficiency class % A A
Heating seasonal energy efficiency 91 92
Heating sound power dB (A) 58 59
Domestic hot water energy efficiency class B B
Domestic hot water energy efficiency % 74 68
Stated domestic hot water profile load XL XL
ELECTRICAL SPECIFICATIONS
Power supply voltage V 230
Frequency Hz 50
Absorbed electrical power (Q
n
max) W 211
Absorbed electrical power at (Q
n
min) 30% W 64
Absorbed electrical power in stand-by W 1
Electrical protection degree IP IPX2
COMBUSTION DATA
Cast iron elements No. 3 4
Fume temperature (80-60°C) °C 85 73
Fume mass flow rate m3n/h 26,3 37,2
CO
2
% 12,5 12,5
NOx measured (*) mg/kWh 107 110
TEMPERATURE - PRESSURE
Max operating temperature (T max) °C 95
Heating adjustment range °C 45÷85
Max operating pressure
bar 4
kPa 392
Water content in thermal unit l 18 22
Expansion vessel capacity l 10 10
Expansion vessel pressure
bar 1 1
kPa 98 98
Head loss fume side (****)
mbar 0,16 0,2
kPa 0,016 0,02
Combustion chamber pressure (****)
mbar 0,16 0,2
kPa 0,016 0,02
Recommended negative pressure at flue
mbar 0,3 0,3
kPa 0,03 0,03
PRODUCING DOMESTIC HOT WATER
Domestic hot water adjustment range °C 30÷60
Specific DHW flow rate (EN 13203) l/min 12 14 (***)
Continuous DHW flow rate (ΔT 30°C) l/min 12 14 (***)
Minimum DHW flow rate l/min 2,5 2,5
Max calorifier operating pressure (PMW)
bar 6 6
kPa 588 588
(*) NOx Class as per EN 267:2009
(**) Heat input calculated using the lower heat output (Hi)
(***) Values relevant to DHW inlet pressure of 3 bar
(****) Data measured with flue draught of 0 mbar