Boilers in closed system
Defro Duo Mini NZ
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.
Reinforced version NZ with installed cooling coil pipe and compete protective fixtures allowing installation in closed system. NZ version requires extra payment, according to the Boilers Equipment Price List.
|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 mm thickness from steel mills of Arcelor Mittal Poland S.A.|
|high thermal efficiency over 88%|
|boiler adapted for installation in closed system in version DUO MINI NZ|
|two furnace chamber: bottom with automatic burner, upper for wood combustion /for manual charging/|
|worm completely made of cast iron|
|large combustion chamber with highly effective retort burner made of high quality cast iron|
|Specification / boiler type||Unit||14||17||22||30|
|Area of heated
|m2||to 190||to 230||to 280||to 360|
|Capacity of fuel container **
|Optimum thermal efficiency||%
|Max. permissible operation
|Required flue gas draught||Pa
|Water supply temperature
|Boiler weight ****
|Boiler water tank capacity||l
|Chimney section||Ø mm||160
|Minimum chimney height||m
|Diameter of supply and return Dn||mm
|Maximum power consumption||W
|Height to bottom edge
|Dimensions of substitute combustion
chamber and charging hole
|width x height.
||308 x 188
||358 x 238
||358 x 238
||358 x 238|
* Maximum area of heated rooms estimated for unit heat demand q=80 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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