Boilers with feeder for coal

Defro Duo Mini

Boilers with feeding screw and retort burner of II generation adapted for combustion of eco-pea coal and fine coal. Design of burner nozzle and even better fuel feeding system allows using fuels characterizing with better sinterability. Furnace is made of high quality heat resistant cast iron ensuring great durability. Boilers are equipped with the furnace chamber created by fixed water-cooled grate, what allows combustion of such fuels as thicker wood or coal and allows using boiler also on emergency cases. Microprocessor controller is used for supervision of combustion process and maintaining of temperature set for boiler.

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
wymiennik ciepła wykonany z atestowanej stali kotłowej /gat. P265GH/ o grubości 6mm z hut Arcelor Mittal Poland S.A. heat exchanger made of certified boiler steel
wysoka sprawność cieplna powyżej 88% high thermal efficiency over 88%
uklad-zamkniety.png boiler adapted for installation in closed circuit in version DUO MINI NZ
auto-manual.png two furnace chambers: bottom with automatic burner, upper for wood combustion /for manual charging/
ślimak w całości wykonany z żeliwa worm completely made of cast iron
duza-komora-retort-pz.png large combustion chamber with highly effective retort burner made of high quality cast iron

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

 

Name of the boiler   Duo Mini
Specification/boiler type Unit 14 17 22 30
Power range kW 4,2-14 5,1-17 6,6-22 9-30
Heating area

m2

1,7 1,9 2,4 3,2

Area of heated rooms 1

m2

to 190 to 230 to 280 to 360

Fuel tank capacity 2

kg ~148 ~148 ~148 ~198
Optimum thermal efficiency % ~87
Energy efficiency class - C C C C

Max. permissible operation

pressure

bar 1,5 - opened system, 2,5 - closed system
Required flue gas draught Pa 23 25 27 30
Max. temp. of water on supply °C 65/80

Boiler weight 3

kg 377 395 438 513
Boiler water tank capacity l 66 72 87 114
Chimney section cmxcm 14x14 14x14 15x15 17x17
Chimney section

Ø mm

160 160 165 190

Minimum chimney height

m

5

6

7

8

Width mm

1197

1230

1230

1230

Depth

mm

812

812

837

910

Height 4

mm 1475 1475 1492 1598

Diameter of supply and return Dn

mm

G1 ½”

Diameter of flue mm 159 159 159 159

Supply

V/Hz

~230/50
Maximum power consumption W 267 267 267 284

Height to bottom edge of flue

mm

1437

1437

1492

1598

Dimensions of charging chamber and charging hole

width

depth

height

width x height

308

340

220

308 x 188

358

340

220

358 x 238

358

390

220

358 x 238

358

470

230

358 x 238

1 Maximum area of heated rooms estimated for unit heat demand q=80 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.


NOTE! Please specify side of the container (left or right) during ordering of the DUO MINI boiler.

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