Datasheet Content
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073571_A_gb
OR MODULATING WITH ELECTRONIC CONTROL BOX
K 350/M-EL EVO - K 450/M-EL EVO - K 550/M-EL EVO
Dual fuel burners gas/light oil with electronic control box. Two stages progressive or modulating
operation (if equipped with addition of 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 at reverse blades 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.
K 350/M-EL EVO - K 450/M-EL EVO - K 550/M-EL EVO
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073571_A_gb
OR MODULATING WITH ELECTRONIC CONTROL BOX
CONTROL BOX LAMTEC BT3
Fig. Control box Lamtec BT3
K 350/M-EL EVO - K 450/M-EL EVO - K 550/M-EL EVO
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073571_A_gb
OR MODULATING WITH ELECTRONIC CONTROL BOX
TECHNICAL DATA
MODEL K 350/M-EL EVO K 450/M-EL EVO K 550/M-EL EVO
Thermal power min. 1°st. / min. 2°st. - max. 2°st. * [Mcal/h] 400/1202-3508 438/1600-4500 426/2000-5500
Thermal power min. 1°st. / min. 2°st. - max. 2°st. * [kW] 465/1395-4070 510/1860-5232 496/2325-6395
Gas flow G20 (NAT. GAS) min. 1°st. / min. 2°st. - max. 2°st. * [Nm³/h] 49/132-408 52/187-526 50/234-643
Gas flow G31 (L.P.G.) min. 1°st. / min. 2°st. - max. 2°st. * [Nm³/h] 20/53-163 20/72-203 20/90-248
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 60
Min. pressure gas train D2" FS50 NAT.GAS/L.P.G. ** [mbar] 200/79 324/128 -/226
Min. pressure gas train DN65 FS65 NAT. GAS/L.P.G. ** [mbar] 66/27 103/43 325/134
Min. pressure gas train DN80 FS80 NAT. GAS/L.P.G. ** [mbar] 53/23 82/35 223/90
Min. pressure gas train DN100 FS100 NAT. GAS/L.P.G. ** [mbar] 42/19 65/28 124/52
Max. pressure at the entry of valves (Pe. max) [mbar] 360-500 360-500 360-500
LIGHT-OIL flow min. 1°st. / min. 2°st. - max. 2°st. * [kg/h] 42/114-351 44/160-450 43/200-550
Fuel: light-oil 1.5°E at 20°C = 6.2 cSt = 35sec Redwood N°1
Nominal electric power [kW] 12 14 18
Fan motor [kW] 9.2 11 15
Pump motor [kW] 2.2 2.2 2.2
Nominal fan motor current absorption [A] 18.8 22 30
Nominal pump motor current absorption [A] 4.7 4.7 4.7
Nominal absorption auxiliary [A] 0.5 0.5 0.5
Power supply: 3~400V, 1N~230V - 50Hz
Electric protection degree: IP40
* 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).
K 350/M-EL EVO - K 450/M-EL EVO - K 550/M-EL EVO
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073571_A_gb
OR MODULATING WITH ELECTRONIC CONTROL BOX
OPERATING RANGE DIAGRAM
[ mbar] 25
K 350/M-EL EVO
20
15
10
5
0
0 500 1000 1500 2000 2500 3000 3500 4000 4500
[kW]
Fig. 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.
[ mbar]
25
K 450/M-EL EVO
20
15
10
5
0
200 1200 2200 3200 4200 5200 6200
[kW]
Fig. 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 350/M-EL EVO - K 450/M-EL EVO - K 550/M-EL EVO
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073571_A_gb
OR MODULATING WITH ELECTRONIC CONTROL BOX
25
[ mbar]
K 550/M-EL EVO
20
15
10
5
0
0 1000 2000 3000 4000 5000 6000 7000 [kW]
Fig. 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 350/M-EL EVO - K 450/M-EL EVO - K 550/M-EL EVO
DUAL FUEL GAS/LIGHT-OIL BURNERS TWO STAGES PROGRESSIVE
SK073571_A_gb
OR MODULATING WITH ELECTRONIC CONTROL BOX
DIMENSIONS [MM]
Fig. Dimensions
MODEL A B C D E F G H R1 R2 R3 R4
K 350/M-EL EVO - D2" 490 600 550 380 160 1170 650 275 320 720 855 890
K 350/M-EL EVO - DN65 490 600 550 380 160 1170 650 275 320 745 890 780
K 350/M-EL EVO - DN80 490 600 550 380 160 1170 650 275 320 745 915 800
K 350/M-EL EVO - DN100 490 600 550 380 160 1170 650 275 320 795 975 840
K 450/M-EL EVO - D2" 490 600 550 380 160 1170 650 275 320 720 855 890
K 450/M-EL EVO - DN65 490 600 550 380 160 1170 650 275 320 745 890 780
K 450/M-EL EVO - DN80 490 600 550 380 160 1170 650 275 320 745 915 800
K 450/M-EL EVO - DN100 490 600 550 380 160 1170 650 275 320 795 975 840
K 550/M-EL EVO - D2" 490 600 550 380 160 1170 650 275 320 720 855 890
K 550/M-EL EVO - DN65 490 600 550 380 160 1170 650 275 320 745…
