ARCA MK Series - Page 7

3
MK 120 MK 140 MK 170 MK 230 MK 300
kW
kcal/h
102 ÷ 120,2
87.720 ÷ 103.372
120 ÷ 140,3
103.200 ÷ 120.658
145 ÷ 170,1
124.700 ÷ 146.286
174 ÷ 230
149.640 ÷ 197.800
220 ÷ 291,7
189.200 ÷ 250.862
kW
kcal/h
110 ÷ 131,1
94.600 ÷ 112.746
130 ÷ 153,3
111.800 ÷ 131.838
157 ÷ 186,1
135.020 ÷ 160.046
188 ÷ 250,5
161.680 ÷ 215.430
237 ÷ 319,7
203.820 ÷ 274.942
Combustion chamber volume m³
0,100 0,121 0,121 0,190 0,235
kW/m³
kcal/h m
3
1.311
1.127.460
1.267
1.089.570
1.538
1.322.694
1.318
1.133.842
1.360
1.169.966
Exchange surface m²
4,3 5,1 5,1 6,5 7,9
kW/m²
kcal/h m²
28,0
24.040
27,5
23.658
33,4
28.684
35,4
30.431
36,9
31.755
Smoke duct number n°
23 23 23 28 28
Smoke duct diameter Ø est.
1½” 1½” 1½” 1½” 1½”
Boiler weight kg
310 340 340 410 460
Water content lt.
140 180 180 280 300
Operating pressure bar
5 5 5 5 5
Hydraulic pressure bar
7,5 7,5 7,5 7,5 7,5
Max. operating temperature °C
95 95 95 95 95
Water loss of heat ∆t=15°C mbar
18 20 22 25 30
Combustion chamber pressure mbar
0,5 0,7 1,2 1,5 3,2
Min. efficiency at 100% %
88,2 88,3 88,5 88,7 88,8
Efficiency at 100% %
91,6 91,3 91,3 91,8 91,0
Min. efficiency at 30% %
86,3 86,5 86,8 87,1 87,2
Efficiency at 30% %
92,8 92,5 92,6 93 92,0
Loss of heat at the chimney with operating burner %
7,27 7,66 7,58 7,18 7,84
Loss of heat at the chimney with burner out %
0,25 0,29 0,22 0,24 0,26
Jacket losses ∆t=50°C %
1,13 1,04 1,12 1,02 0,96
Burner connection (Ø) mm
150 150 150 185 185
Flue connection (Ø) mm
200 200 200 250 250
Min. chimney depression mbar
0,2 0,2 0,2 0,2 0,2
Max. smoke temperature °C
196 186 188 182 198
Smoke temperature in output range °C
169 ÷ 196 145 ÷ 186 150 ÷ 188 142 ÷ 182 149 ÷ 198
CO
2
a gas %
10,2 10,5 9,9 9,7 10
CO a gas ppm
28 26 22 16 21
NOx a gas ppm
48 42 50 44 49
Max. light oil smoke flow rate m³/h
314 373 453 599 756
Max. methane smoke flow rate m³/h
278 338 411 531 665
Light oil burning air volume (practice) m³/h
171 197 239 327 413
Methane burning air volume (practice) m³/h
158 175 213 302 376
Combustion chamber dimension (DiameterXLenght) mm
390 × 830 390 × 1.010 390 × 1.010 468 × 1.050 468 × 1.300
Thermostat adjustment range °C
55 ÷ 80 55 ÷ 80 55 ÷ 80 55 ÷ 80 55 ÷ 80
Output
Fornace output
Thermal load
Thermal output