Datasheet Content
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073525_A_gb_190-250
OR MODULATING WITH ELECTRONIC CONTROL BOX
K 190/M-EL - K 250/M-EL
Dual fuel burners gas/light oil with electronic control box. Two stages progressive or modulating
operation(ifequipped withadditionof optional modulation kit PID and probe; to guarantee an ideal proportionality
of the power supplied to the thermal load).
Composed by: fan at high pressurisation and combustion head with adjustment at high efficiency and high flame
stability.
Compact overall dimensions and disposition rationalized of the components with accessibility facilitated for the
operations of setting and maintenance.
Available in the versions METHANE (natural gas) or L.P.G. (to specify at the order) on demand specific versions for
town gas, coal gas or biogas.
Gas train completely assembled and tested; composed by: working valve class A - safety valve class A - minimum
gaspressure switch - gas valve proving pressure switch - filter
Supplied with nozzle, fuel selection switch, flange and gasket for installation on boiler, flexible hoses, line filter.
The servomotors are indipendent and managed directly from the electronic control box of the burner: one
servomotor for the gas modulator, one servomotor for the air shutter and one servomotor fo the light-oil modulator.
The burners are equipped with a display that allows to:
- adjust the operating parameters of the burner
- visualize the flame intensity
- adjust the operating curve of the burner (air / fuel ratio)
With the addition of optional accessories (probes) thanks to the most advanced systems for automatic modulation in
mechanical or electronic version, the burner constantly ensures the proper gas / air ratio. The maximum efficiency of
the returns in each combustion point derived from the punctual adaptation of the thermal load to the heat
requirements of the burner at any instant of operation.
In the version with the electronic cam the fuel / combustion air curve, more extended, is fully exploited,
guaranteeing excellent performance in terms of accuracy and speed, even during the calibration phase.
A microprocessor monitors the different stages of the process and allows the correct repetition of the sequences of
operation.
Optional accessories: PID power modulator kit, probe, PC interface, VSD, O2 control, O2 + CO control, field bus
(profibus, modbus, profinet), Touchscreen HMI panel.
Fig. 1 K 250/M-EL
K 190/M-EL - K 250/M-EL
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073525_A_gb_190-250
OR MODULATING WITH ELECTRONIC CONTROL BOX
TECHNICAL DATA AND OPERATING RANGE DIAGRAM K 190/M-EL - K 250/M-EL
MODEL K 190/M-EL K 250/M-EL
Thermal power min. 1°st. / min. 2°st. - max. 2°st. * [Mcal/h] 300/900-2060 400/1000-2500
Thermal power min. 1°st. / min. 2°st. - max. 2°st. * [kW] 349/1046-2395 465/1163-2907
Gas flow G20 (NATURAL GAS) min. 1°st. / min. 2°st. - max. 2°st. * [Nm³/h] 35/105-241 47/117-292
Gas flow G31 (L.P.G.) min. 1°st. / min. 2°st. - max. 2°st. * [Nm³/h] 14/41-93 18/45-113
Fuel: NATURAL GAS (second family) - L.P.G. (third family)
Fuel category: I2R,I2H,I2L,I2E,I2E+,I2Er,I2ELL,
I2E(R)B/I3B/P,I3+,I3P,I3B,I3R
Intermitted working operation (min. 1 stop every 24 hours) two stage progressive or modulating
Environmental conditions operation / storage: -15...+40°C / -20...+70°C, rel. humidity max. 80%
Max. temperature combustion air [°C] 60 60
Minimum pressure gas train D2" FS50 NATURAL GAS/L.P.G. ** [mbar] 152/76 226/110
Minimum pressure gas train DN65 FS65 NATURAL GAS/L.P.G. ** [mbar] 79/47 110/66
Minimum pressure gas train DN80 FS80 NATURAL GAS/L.P.G. ** [mbar] 65/41 90/58
Minimum pressure gas train DN100 FS100 NAT. GAS/L.P.G. ** [mbar] 49/35 69/50
Maximum pressure at the entry of valves (Pe. max) [mbar] 360-500 360-500
LIGHT-OIL flow min. 1°st. / min. 2°st. - max. 2°st. * [kg/h] 30/90-206 40/100-250
Fuel: light-oil 1.5°E at 20°C = 6.2 cSt = 35sec Redwood N°1
Nominal electric power [kW] 7 9
Fan motor [kW] 5.5 7.5
Pump motor [kW] 1.1 1.1
Nominal absorption powers [A] 14 16
Nominal absorption auxiliary [A] 0.5 0.7
Power supply: 3~400V, 1N~230V - 50Hz
Electric protection degree: IP40 IP40
Noisiness *** min. - max. [dB(A)] 81-82 82-86
Burner weight [kg] 140 152
* Reference conditions: Environment temperature 20°C - Barometric pressure 1013 mbars - Altitude 0 metre (sea level).
** Minimal feeding-gas pressure to the gas train to get the maximum power of the burner, considering counter-pressure in combustion chamber of
value 0 (zero).
*** Measured sonorous pressure in the laboratory combustion, with functional burner on beta boiler to 1 metre of distance (UNI EN ISO 3746 law).
[ mbar] 19
15
11
7
3
K 190/M K 250/M
-1
300 700 1100 1500 1900 2300 2700 3100 [kW]
Fig. 2 X = Thermal power Y = pressure in combustion chamber
The firing rates has been obtained based on test boilers in accordance with EN676 standards and are indicative of matching the burner to the
boiler. For the correct operation of the burner, combustion chamber dimensions must be in accordance with current regulation. In case of non-
compliance, contact the manufacturer.
K 190/M-EL - K 250/M-EL
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073525_A_gb_190-250
OR MODULATING WITH ELECTRONIC CONTROL BOX
DIMENSIONS [MM]
20 A
D
A
R4
B
F TL RD
G H
R1
R2
C
R3
Fig. 3 Dimensions
MODEL A B C D F G H R1 R2 R3 R4 RD
K 190/M-EL - D2" 370 495 966 265 145 647 479 870 777 912 254 Rp 2
K 190/M-EL - DN65 370 495 966 265 145 647 479 688 871 1020 254 DN65
K 190/M-EL - DN80 370 495 966 265 145 647 479 708 811 1005 254 DN80
K 190/M-EL - DN100 370 495 966 265 145 647 479 748 811 991 254 DN100
K 250/M-EL - D2" 370 495 966 265 145 647 479 870 777 912 254 Rp 2
K 250/M-EL - DN65 370 495 966 265 145 647 479 688 871 1020 254 DN65
K 250/M-EL - DN80 370 495 966 265 145 647 479 708 811 1005 254 DN80
K 250/M-EL - DN100 370 495 966 265 145 647 479 748 811 991 254 DN100
BOILER PLATE
Fig. 4 Boiler plate
MODEL L min L* L max M N min N* N max
K 190/M-EL mm 280 280 320 M14 396 424 438
K 250/M-EL mm 280 280 320 M14 396 424 438
* The dimensions of the boiler plate (threaded holes or studs) must be as indicated in the drawing.
FLAME TUBE LENGTH
Flame tube length must be selected based on the specifications supplied by boiler manufacturer and, in any case, it
must be greater than the thickness of the boiler door included its insulation. In case of boilers with flame inversion or
front flue combustion chambers, it is necessary to insulate the area between the flame tube and front door with
refractory material. This protection material must not impede flame tube extraction.
MODEL TL **
K 190/M-EL mm 481
K 250/M-EL mm 481
** For different flame lengths, please contact our Technical-Sales Department.
K 190/M-EL - K 250/M-EL
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073525_A_gb_190-250
OR MODULATING WITH ELECTRONIC CONTROL BOX
PRODUCT SPECIFICATION
SHORT DESCRIPTION
Dual fuel burners…
