Boilers with feeder for coal

Defro Duo

DEFRO DUO is a flagship boiler with characteristic logo of the company. This innovative design has two combustion chamberss - bottom, equipped with automatic fuel feeder with integrated retort burner and upper created by the fixed-mounted tubular water-cooled grate with wall thickness of 8.8 mm. Use of the upper chamber allows using e.g. wood chips as a fuel, it also allows start-up of the boiler in the emergency situations. Grate deck acts also as a water tubes and is an additional heat exchange surface. Heat exchanger of boilers is completely made of boiler steel of thickness 6-10 mm, while the individual components endangered with action of flames and substances in the flue gases - are made of thickness even 10-12 mm. Boilers are equipped with series of sensors monitoring its operation. They are adapted for installation of the additional, automatic, water extinguishing system STRAŻAK (FIRE FIGHTER). Boiler version with innovative PID controller with touch panel is available as a standard.

 
5 lat gwarancji na szczelność wymiennika ciepła, 2 lata na pozostałe elementy i sprawne działanie kotła 5 years of warranty for heat exchanger tightness, 2 years for the remaining components and efficient operation of boiler;
wymiennik ciepła wykonany z atestowanej stali kotłowej /gat. P265GH/ o grubości 6-10mm z hut Arcelor Mittal Poland S.A. heat exchanger made of certified boiler steel
K1P v3.jpg
controller K1P with colour touch panel servicing 4 pumps /central heating, hot utility water, circulation, floor pump/ and PID algorithm. Possibility to operate mixing valves, control using GSM or INTERNET*; adjustable angle of control panel, PID control
wysoka sprawność cieplna powyżej 90% high thermal efficiency over 90%
uklad-zamkniety.png boiler adapted for installation in closed circuit in version DEFRO DUO NZ
 duża komora spalania z wysokoefektywnym palnikiem retortowym
large combustion chamber with highly effective retort burner
dwie komory paleniskowe: dolna z palnikiem automatycznym, górna do spalania drewna /przy załadunku ręcznym/ two furnace chambers: bottom with automatic burner, upper for wood combustion /for manual charging/

(*) - extra payable equipment, installed on Customer’s request

 

Name of the boiler   Defro Duo
Specification/boiler type Unit 15 20 25 35 50 75
Power range kW 4,5-15 6,0-20 7,5-25 10,5-35 15,0-50 22,5-75
Heating area

m2

1,9 2,4 2,8 3,2 4,4 5,8

Area of heated rooms 1

m2

to 200 to 260 to 300 to 370 to 580 to 750

Fuel tank capacity 2

kg ~176 ~176 ~176 ~266 ~266 ~342
Optimum thermal efficiency % ~90,3-90,9
Energy efficiency class - D C C C B C

Max. permissible operation

pressure

bar opened system: 1,5 / closed system 2,5
Required flue gas draught Pa 24 26 28 31 34 38
Max. temp. of water on supply °C 65/80

Boiler weight 3

kg 465 504 539 627 798 949
Boiler water tank capacity l 80 106 114 120 172 218
Chimney section cmxcm 14x14 14x14 15x15 18x18 20x20 25x25
Chimney section

Ø mm

160 160 170 200 230 280

Minimum chimney height

m

7

7,5

8

9

10

11

Width mm 1080 1080 1136 1300 1300 1380

Depth

mm

950

1060

1060

1090

1310

1318

Height 4

mm 1664 1664 1664 1715 1715 1912

Diameter of supply and return Dn

mm

G1 ½”

G2”

Diameter of flue mm 159 159 178 194 194 245

Supply

V/Hz

~230/50

Maximum power consumption W 123 123 123 140 140 195

Height to bottom edge of flue

mm

1258

1258

1252

1270

1270

1404

Dimensions of charging chamber and charging hole

width

depth

height

width x height

308

420

203

308 x 398

308

529

191

308 x 398

358

529

228

358 x 398

408

529

253

408 x 398

404

750

223

404 x 398

504

750

331

504 x 398

1 Maximum area of heated rooms estimated for unit heat demand q=85 W/m².
2 Fuel tank capacity for charging density 0,8 kg/dm³.
3 Boiler weight depends on the equipment.
4 Height of boiler can be additionally adjusted by means of provided levelling legs.
Legs regulation varies from 38 to 50 mm.
5 Extra paid option, installed on the customer’s request.

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