Charging Boilers
KDR Plus 3 A

DESCRIPTION
KDR Plus 3 boilers are based on KDR boilers and additionally equipped with electronic system controlling air blowing for the combustion purposes. 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 forced draught and amount of air necessary for combustion process is controlled using electronic controlled based on PID algorithm maintaining boiler temperature on the same level. Use of multi-point method for supplying of air to the fuel combustion zone increases efficiency of boiler operation and ensured uniform and long-term combustion with stabilization of this process. Heat exchanger of boilers is made of certified boiler steel of thickness 6mm and insulated with mineral wool to limit heat losses
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4 years of warranty for heat exchanger tightness, 2 years for the remaining components and efficient operation of boiler. |
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Heat exchanger made of certified high-grade boiler steel; |
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electronic control of boiler: S3P controller servicing 2 pumps /central heating and hot utility water/ and PID algorithm maintaining constant boiler temperature; adjustable below the control panel;
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high thermal efficiency reaching 82,2-83% thanks to increase heat recovery from flue gases |
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in version for closed system as KDR 3 NZ* |
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Large combustion chamber |
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multi-point air supply system to the fuel charging zone |
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wide range or power |
(*) - extra payable equipment, installed on Customer’s request
Name of the boiler | KDR Plus 3 A |
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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 1 |
m2 |
to 150 | to 200 | to 220 | to 250 | to 300 | to 350 | to 400 | to 500 |
Single fuel charging | kg | ~23 | ~30 | ~39 | ~45 | ~73 | ~106 | ~106 | ~152 |
Optimum thermal efficiency | % | ~82,2-83,0 | |||||||
Energy efficiency class | - | D | D | D | D | D | D | D | D |
Max. permissible operation pressure |
bar | 1,5 | |||||||
Required flue gas draught | Pa | 23 | 25 | 27 | 28 | 30 | 31 | 32 | 34 |
Max. temp. of water on supply | °C | 65/85 | |||||||
Boiler weight 2 |
kg | 251 | 307 | 355 | 380 | 420 | 495 | 532 | 626 |
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 | 1515 | 1569 | 1569 | 1569 | 1765 | 1765 | 1916 | 2067 |
Diameter of supply and return Dn |
mm |
G1 ½” |
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Diameter of flue | mm | 159 | 159 | 159 | 178 | 178 | 178 | 194 | 244 |
Supply |
V/Hz |
~230/50 |
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Maximum power consumption | W | 44 | 44 | 44 | 44 | 44 | 44 | 165 | 165 |
Height to bottom edge of the flue |
mm |
1036 |
1086 |
1086 |
1068 |
1268 |
1268 |
1357 |
1458 |
Dimensions of charging chamber and charging hole |
width depth height width x height |
258 380 230 258x188 |
308 430 230 308x238 |
308 547 230 308x238 |
358 547 230 358x238 |
358 547 371 358x288 |
458 547 424 458x288 |
458 547 424 458x288 |
508 547 547 508x288 |
1 Maximum area of heated rooms estimated for unit heat demand q=80W/m².
2 Boiler weight depends on the equipment.
3 Extra paid option, installed on the customer’s request.