Boilers in closed system

DELTA NZ

DELTA boilers are intended for combustion of hard coal and firewood. Combustion process is mechanically controller using knob of lifting flap in ash-pan doors. Moreover, adjustable flap for adjustment of inflow of secondary air, is located in charging doors. This solution significantly improves course of combustion process and parameters of flue gas emission. It is also possible to adjust combustion process using draught regulator. Furthermore, boilers are factory adapted for assembly of fan and electronic controller. The advantage of the boiler is capacious combustion chamber ensuring many hours of equipment operation and large charging doors facilitating charging of fuel.

 

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.

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 z hut Arcelor Mittal Poland S.a., oddział Kraków oraz U.S. Steel Kosice s.r.o. heat exchanger made of certified boiler steel /grade P265GH/ of 6 mm thickness from steel mills of Arcelor Mittal Poland S.A. division and U.S. Steel Kosice s.r.o.
 wysoka sprawność cieplna sięgająca 83% dzięki zwiększonemu odzyskowi ciepła ze spalin
high thermal efficiency reaching 83% thanks to increased heat recovery from flue gases
przystosowany do montażu w układzie zamkniętym w wersji NZ adapted for installation in closed system in version NZ*
 mechaniczny ruszt ruchomy do odpopielania rusztowin wodnych
mechanical movable grate for removal of ash from water grates
duża komora paleniskowa large furnace chamber
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
 fabrycznie przystosowany do montażu zestawu nadmuchowego
factory adapted for installation of blowing set

(*) - 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.

Power range: 8-22 kW - Table no. 1

Power range: 25-49 kW - Table no. 2


Table no. 1
Specification / boiler type Unit 8 12 16 19> 22
Power range kW 2,4 -8 3,6 - 12 4,8 -16 5,7 -19 6,6 -22
Heating area m2 1,2 1,4 1,8 2,0 2,2
 Area of heated rooms m2 to 110 to 140 to 180 to 200 to 230
Single fuel charging kg ~13 ~18 ~23 ~23 ~28
Optimum thermal efficiency % ~83
 Max. permissible work pressure bar 2,5
Required flue gas draught Pa 18 21 24 26 27
Max. water supply temperature °C 65/90
Boiler weight **
kg 231 258 289 302 325
Boiler water tank capacity l 49 55 70 74 82
Chimney section cmxcm 14x14 14x14 14x14 14x14 15x15
Chimney section Ø mm  160 160 160 160 165
Minimum chimney height m 5 5 6 6,5 7
Width mm 646 646 646 646 696
Depth mm 990 1082 1094 1094 1094
Height mm 975 975 1075 1125 1125
Diameter of supply and return Dn mm G1 ½”
Flue size mm 159 159 159 159 159
 Height to bottom edge of flue mm 573 573 673 723 723
Dimensions of combustion chamber and fuel charging hole width 258 258 258 258 308
  depth 270 365 404 404 404
  height 240 240 280 280 280
 Chips size width x height 258 x 208 258 x 208 258 x 238 258 x 288 308 x 288

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

** Boiler weight depends on the equipment.


Table no. 2
Specification / boiler type Unit 25 28 35 42 49
Power range kW 7,5
-25
8,4-
28
10,5
-35
12,6
-42
14,7
-49
Heating area m2 2,4 2,7 3,2 4,2 4,9
Area of heated rooms m2 to 250 to 280 to 350 to 440 to 500
Single fuel charging kg ~32 ~37 ~51 ~56 ~61
Optimum thermal efficiency % ~83
Max. permissible work pressure bar 2,5
Required flue gas draught Pa 28 29 31 32 34
Max. water supply temperature °C 65/90
Boiler weight **
kg
354
382
429
489
555
Boiler water tank capacity l
90
98
114
136
158
Chimney section cmxcm 16x16
16x16
18x18
20x20
21x21
Chimney section Ø mm 175
185
200
220
235
Minimum chimney height
m
7
7,5
8
8
8,5
Width mm
746
796
846
846
846
Depth mm
1094
1094
1114
1262
1410
Height mm
1125 1125 1175
1178
1180
Diameter of supply and return Dn mm
G1 ½”
Flue size mm
159
178
178
178
178
Height to bottom edge of flue mm 723
714
765
768
768
Dimensions of combustion chamber and fuel charging hole width 358
408
458
458
458
  depth 404
404
424
464
504
  height
280
280
330
330
330
  Chips size width x height 358 x 288
408 x 288
458 x 288
458 x 288
458 x 288

* 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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