Boilers with feeder for coal

Defro Duo Uni

DEFRO DUO UNI boilers are the other two-furnace boilers. Bottom chamber is equipped with innovative trough burner allowing combustion of eco pea coal, qualified fines and crops grains. Upper chamber is created by fixed water-cooled grate, allowing periodical combustion of the other fuels and start-up of boiler in emergency situations. 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 components increasing operational safety e.g. flap opening sensor, double protection against ignition of fuel in hopper - first implemented by the controller, the second - by automatic, water extinguishing system STRAŻAK (FIRE FIGHTER). Version with innovative controller with touch panel is available as a standard.

   
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 K1 with colour touch panel servicing 4 pumps /central heating, hot utility water, circulation, floor pump/. Possibility to operate mixing valves, control using GSM or INTERNET*; adjustable angle of control panel
5 lata 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
 wysoka sprawność cieplna sięgająca 90% dzięki zwiększonemu odzyskowi ciepła ze spalin
high thermal efficiency reaching 90% thanks to increased heat recovery from flue gases
uklad-zamkniety.png boiler adapted for installation in closed circuit in version DEFRO DUO UNI NZ
dolna komora paleniskowa z wysoko efektownym palnikiem rynnowym bottom furnace chamber with highly effective trough burner
 system automatycznego wodnego gaszenia paliwa z zaworem termostatycznym
bottom furnace chamber with highly effective trough 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 Uni
Specification/boiler type Unit 15 20 25 35 50
Power range kW 4,5-15 6,0-20 7,5-25 10,5-35 15,0-50
Heating area

m2

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

Area of heated rooms 1

m2

to 200 to 260 to 300 to 370 to 580

Fuel tank capacity 2

kg ~178 ~178 ~178 ~228 ~228
Optimum thermal efficiency % ~90,3-90,9
Energy efficiency class - D C C C C

Max. permissible operation

pressure

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

Boiler weight 3

kg 459 502 538 614 777
Boiler water tank capacity l 80 106 114 120 172
Chimney section cmxcm 14x14 14x14 15x15 18x18 20x20
Chimney section

Ø mm

160 160 170 200 230

Minimum chimney height

m

7

7,5

8

9

10

Width mm 1195 1195 1257 1298 1287

Depth

mm

950

1060

1060

1090

1310

Height 4

mm 1664 1664 1664 1715 1715

Diameter of supply and return Dn

mm

G1 ½”

Diameter of flue mm 159 159 178 194 194

Supply

V/Hz

~230/50

Maximum power consumption

(operation / firing)

W 873/123 873/123 873/123 890/140 890/140

Height to bottom edge of flue

mm

1258

1258

1252

1270

1270

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

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 Details of burning pellets can be found in the manual of the boiler.
6 Extra paid option, installed on the customer’s request.

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