Charging Boilers

KDR 3

KDR 3 boilers are adapted for combustion of solid fuels, especially wood in form of chunks, and large combustion chamber allows several-hour operation of the equipment. Boilers are operating using natural draught and combustion process does not require use of electric energy. Amount of air necessary for combustion process is adjusted using lifting flap in ash-pan doors, which can be adjusted manually or using string of draught controller /additional equipment/. Boilers are factory adapted for installation of blowing set. Heat exchanger of boilers is made of certified boiler steel of thickness 6mm and insulated with mineral wool to limit heat losses.

4 lata gwarancji na szczelność wymiennika ciepła, 2 lata na pozostałe elementy i sprawne działanie kotła 4 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 heat exchanger made of certified boiler steel /grade P265GH/ of 6 mm thickness
sprawność high thermal efficiency reaching 82,2-83% thanks to increase heat recovery from flue gases
w wersji do układu zamkniętego jako KDR 2 NZ in version for closed system as KDR 2 NZ*
regulacja procesu spalania przy pomocy miarkownika ciągu* lub pokrętła w drzwiach popielnikowych combustion process adjustment using draught regulator* or knob in ash-pan doors
duża komora spalania Large combustion chamber
szeroki zakres mocy wide range or power
fabrycznie przystosowany do montażu zestawu nadmuchowego factory adapted for installation of blowing set
regulacja dopływu powietrza wtórnego adjustment of secondary air inflow

 

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

DEFRO company reserves the right to introduce without any notice changes in technical parameters, equipment and specification of offered products. Information included on this page are not assurance within the meaning of art. 4 par 3 and 4 of the Act of 27 July 2002 on special conditions of consumer sales and change of Civil Code (hereinafter “Act”) and are not description of the product within the meaning of art. 4 par. 2 of the Act. This page is not an offer within the meaning of the art. 66 of the Civil Code.

Specification / boiler type Unit 12 15 20 25 30 35 40 50
Power range kW 3,6-12
4,5-15
6,0-20 7,5-25
9,0-30
10,5-35
12,0-40
15,0-50
Heating area m2 1,4
1,8
 2,2 2,4
2,7
3,2
3,6
4,3
Area of heated rooms*
m2 to 150
to
200
to
220
to
250
to
300
to
350
to 400 to 500
Single fuel charging kg ~18 ~24
~31 ~36
~58
~85
~85

~122

Optimum thermal efficiency %
~82,2-83  
Max. permissible work pressure bar
1,5
Required flue gas draught Pa
22
24
26
28
30
31
32
34
Max. water supply temperature °C
65/90
Boiler weight  **
kg
243
299
336
364
404
476
511
589
Boiler water tank capacity l 62
82
106
115
127
146
151 185
Chimney section cmxcm
14x14
14x14
14x14 16x16 17x17 18x18
19x19
21x21
Chimney section Ø mm
160
160
160
170
190
200
210
230
Minimum chimney height
m 6
6
7
8
8
8
9
9
Width mm
547 597
597 647
647 747 747 797
Depth mm
905 963
1080 1080 1088
1088
1088 1088
Height mm
1284
1350
1350 1350
1550
1550 1650
1800
Diameter of supply and return Dn
mm G1 ½”
Flue size mm
159
159 159
178
178
178
194
244
Height to bottom edge of flue mm
983
1033
1033
1014
1214
1214
1303
1405
Dimensions of combustion chamber and fuel charging hole width 258 308
308
358
358
458
358
508
  depth 380
430
547
547
547
547
547
547
  height 230
230
230
230
371
424
424 547
 Chips size width x height

258

x188

308

x238

308

x238

358

x238

358

x288

458

x288

458

x288

508

x288

 

* Maximum area of heated rooms estimated for unit heat demand q=95 W/m2.

** Boiler weight depends on the equipment.

 

DEFRO company reserves the right to introduce without any notice changes in technical parameters, equipment and specification of offered products. Information included on this page are not assurance within the meaning of art. 4 par 3 and 4 of the Act of 27 July 2002 on special conditions of consumer sales and change of Civil Code (hereinafter “Act”) and are not description of the product within the meaning of art. 4 par. 2 of the Act. This page is not an offer within the meaning of the art. 66 of the Civil Code.

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