Boilers with feeder biomass

Defro Duo EkoPell

DEFRO DUO EKO PELL boilers were designed based on the DEFRO DUO model. The most important difference is a fuel feeder and burner adapted for combustion of biomass in form of pellet from deciduous trees. The most important advantage of these boilers is an advanced automatics - controller servicing central heating and hot utility water pumps and two additional pumps and servicing of mixing valve and self-acting system: of ignition and fuel feeding and cleaning of burner. 
Additional chamber created by fixed water-cooled grate, with thickness of wall 8.8 mm, allows periodical combustion of the other fuels - e.g. wood chips - and start-up of boiler in emergency situations. Boilers are equipped with series of sensors monitoring its operation.

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 6-10mm z hut Arcelor Mittal Poland S.A. heat exchanger made of certified boiler steel
sterownik obsługujący 4 pompy /c.o., c.w.u., obiegowa, podłogowa/ z wyjściem na regulator pokojwy oraz obsługą zaworu mieszającego APC ADAPTIVE CONTROL ver.1 controller - servicing 4 pumps /central heating, hot utility water, circulation, floor/ control of mixing valve, possibility to connect GSM* module
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high thermal efficiency reaching 92% thanks to increased heat recovery from flue gases
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boiler adapted for installation in closed circuit in version DEFRO DUO EkoPell NZ
 duża komora paleniskowa z palnikiem pelletowym
large furnace chamber with pellet burner
układ samoczynnego zapłonu paliwa*
fuel self-ignition system

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

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Name of the boiler   Defro Duo EkoPell
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 ~210 ~210 ~210 ~210 ~225 ~225
Optimum thermal efficiency % ~90,1-92,5
Energy efficiency class - A+ A+ A+ A+ A+ A+

Max. permissible operation

pressure

bar 1,5 - opened system, 2,5 - closed system
Required flue gas draught Pa 24 26 28 31 34 38
Max. temp. of water on supply °C 65/85

Boiler weight 3

kg 481 542 578 638 855 1002
Boiler water tank capacity l 84 103 117 126 176 210
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 1336 1336 1386 1436 1436 1536

Depth

mm

1360

1360

1395

1435

1675

1689

Height 4

mm 1659 1659 1659 1704 1708 1882

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

(operation / firing)

W 76/376 76/376 76/376 126/426 126/426 126/426

Height to bottom edge of flue

mm

1258

1258

1252

1270

1275

1409

Dimensions of charging chamber and charging hole

width

depth

height

width x height

308

420

210

308 x 398

308

528

210

308 x 398

358

528

210

358 x 398

408

528

210

408 x 398

404

750

210

404 x 398

504

695

409

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 0,6 kg/dm³.
3 Boiler weight depends on the equipment.
4
Height of boiler can be additionally adjusted by means of provided levelling legs.
5 Boiler weight depends on the equipment.

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