Boilers with feeder for coal
Automatic boilers DEFRO AKM are equipped with heat exchanger, where components mostly endangered to action of flames are made of boiler steel of thickness 8 mm. Boilers are adapted for operation with piston fuel feeder, feeding fuel to the grate in portions. Drawer feeding fuel has reinforced structure, protected with replaceable components made of stainless steel, while components for moving it have bearings, what increases their durability and ensures quiet and uniform operation. Ceramic catalysts, ensuring afterburning of gases and more ecological combustion process, are additionally located in the furnace chamber. Additional cast iron grate allows combustion of such fuels are wood or coal of thicker assortments. It allows to use boiler in emergency situations. Arrangement of cleaning holes ensures that servicing of boiler is easy and comfortable. Ash container, set of cleaning tools and adjustable legs are included in the standard equipment.
|5 years of warranty for heat exchanger tightness, 2 years for the remaining components and efficient operation of boiler|
heat exchanger made of certified boiler steel /grade P265GH/ of 6-8 mm thickness from steel mills of Arcelor Mittal Poland S.A.
|controller K2 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|
|high thermal efficiency reaching 87% thanks to increased heat recovery from flue gases|
|stable and quiet operation thanks to eccentric power transmission mechanism and bearing of fuel feeding component;|
exchangeable substitute grate made of high-quality cast iron
(*) - extra payable equipment, installed on Customer’s request
|Specification / boiler type||Unit||15||22||30||40||50||75|
|Area of heated
|m2||to 200||to 280||to 360||to 440||to 600||to 800|
|Capacity of fuel container**||kg||~89||~117||~130||~200||~262||~282|
|Optimum thermal efficiency||%||~87-88|
|Max. permissible operation
|Required flue gas draught||Pa||24||26||30||32||34||38|
|Water supply temperature
|Boiler weight ****
|Boiler water tank capacity||l||68||109||119||151||172||257|
|Chimney section||Ø mm||160||165||190||215||230||290|
|Minimum chimney height||m||6||7||8||8||9||9|
|Diameter of supply and return Dn||mm||G1 ½”||G2 ”|
|Maximum power consumption||W||224||273||273||290||290||345|
|Height to bottom edge
|Dimensions of substitute combustion
chamber and charging hole
|width x height.
||258 x 188
||258 x 238
||308 x 238||408 x 238
||454 x 238||504 x 338|
* Maximum area of heated rooms estimated for unit heat demand q=85 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.
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