Boilers in closed system

DS

DS boilers use bottom combustion technique, which belong to the most effective and ecological types of fuel combustion in boilers with manual charging. Layer of heat is maintained at the constant level and therefore fuel is combusted in effective and energy efficient way. Moreover, bottom combustion distinguished with lower pollutants emission, better afterburning of fuel, lower temperature of flue gas leaving the boiler and significantly higher efficiency exceeding 86%. Operation process does not require use of electric energy - boilers are operating using natural draught and temperature is mechanically controlled using knob on lifting flap in ash-pan doors or using draught regulator. Moreover, boiler is equipped with a possibility to adjust stream of secondary air. Boilers are equipped with installed cooling coil pipe allowing assembly in the closed system.

3 lata gwarancji na szczelność wymwyiennika ciepła, 2 lata na pozostałe elementy i sprawne działanie kotła 3 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
wysoka sprawność cieplna sięgająca 87% dzięki zwiększonemu odzyskowi ciepła ze spalin high thermal efficiency reaching 87% thanks to increased heat recovery from flue gases
przystosowany do montażu w układzie zamkniętym boiler in this standard is adapted for installation in closed system
regulacja dopływu powietrza wtórnego adjustment of secondary air inflow
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
katalizator ceramiczny stabilizujący proces spalania ceramic catalyst stabilising combustion process

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
20
25
32
Power range kW 20 25
32
Heating area m2 2,4
3,0 3,6
Area of heated rooms*
m2
to 200
to 250
to 320
Single fuel charging kg
~41,9
~63
~80,3
Optimum thermal efficiency %
 ~83,6-95,4  
Max. permissible work pressure bar
2,0-2,5
Required flue gas draught Pa
18
25
30
Max. water supply temperature °C
 65/90  
Boiler weight ******
kg
- -
-
Boiler water tank capacity l
74
92
110
Chimney section cmxcm
15x15
15x14
17x17
Chimney section Ø mm
170
170
190
Minimum chimney height m
9
10
11
Width mm
673 732 733
Depth mm
997 1103 1103
Height mm
1287 1287 1467
Diameter of supply and return Dn
mm
1½”
Flue size mm
159 178 178
Height to bottom edge of flue mm
953 943 1123
Dimensions of combustion chamber and fuel charging hole
width 358 408 408
  width 284 390 390
  height
515 495 631
Chips size width x height
358x358 408x358 408x388

 

* Maximum area of heated rooms estimated for unit heat demand q=100 W/m2.

**  Fuel tank capacity for charging density 0.8 kg/dm3
**** Height of boiler can be additionally adjusted by means of provided levelling legs. Legs regulation varies from 38 to 50 mm.

****** 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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