ARCA MK Series - Page 10

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PRK 700 PRK 830 PRK 940 PRK 1050 PRK 1200
kW
kcal/h x 1000
539 ÷ 698
463,5 ÷ 600,28
670 ÷ 830
576,2 ÷ 713,8
760 ÷ 940
653,6 ÷ 808,4
820 ÷ 1.050
705,2 ÷ 903
950 ÷ 1.200
817 ÷ 1.032
kW
kcal/h x 1000
586 ÷ 759,5
503,9 ÷ 653,17
724 ÷ 906
622,64 ÷ 779,16
815 ÷ 1.025
700,9 ÷ 881,5
888 ÷ 1.148
763,68 ÷ 987,28
1.029 ÷ 1.315
884,94 ÷ 1.130,9
Combustion chamber volume m³ 0,607 0,676 0,95 0,95 1,056
kW/m³
kcal/h m³
1.251
1.075.860
1.340,2
1.152.572
1.079
927.854
1.208,4
1.039.224
1.245,2
1.070.872
Exchange surface m² 13,7 15,6 19,6 19,6 23
kW/m²
kcal/h m²
50,9
43.774
53,2
45.752
47,9
41.194
53,5
46.010
52,1
44.806
Smoke duct number n° 40 40 49 49 49
Smoke duct diameter Ø est. 1½” 1½” 1½” 1½” 1½”
Boiler weight kg 1.650 1.750 1.850 1.850 2.050
Water content lt. 620 720 1.070 1.070 1.360
Operating pressure bar 6 6 6 6 6
Hydraulic pressure bar 9 9 9 9 9
Max. operatine temperature °C 95 95 95 95 95
Water loss of heat ∆t=15°C mbar
26 30 40 45 54
Combustion chamber pressure mbar 5,7 6,2 5,2 5,6 6,2
Minimum efficiency at 100% % 89,2 89,2 89,2 89,2 89,2
Efficiency at 100% % 91,9 91,5 91,7 91,25 91,3
Minimum effciency at 30% % 87,8 87,8 87,8 87,8 87,8
Efficiency at 30% % 93,9 92,2 93,2 92,9 93,2
Loss of heat at the chimney with working burner % 7,65 8 7,78 8,17 8,22
Loss of heat at the chimney with burner out % 0,18 0,21 0,18 0,20 0,18
Loss of heat at the jacket ∆t=50°C %
0,45 0,5 0,52 0,58 0,48
Burner connection (Ø) mm 240 240 305 305 305
Flue connection (Ø) mm 350 350 400 400 400
Min. chimney depression mbar 0,2 0,2 0,2 0,2 0,2
Max smoke temperature °C 192 185 181 189 192
Smoke temperature in the output range °C 142 ÷ 192 147 ÷ 185 144 ÷ 181 149 ÷ 189 153 ÷ 192
CO
2
a gas % 10,3 10,2 10,3 9,8 10,3
CO a gas ppm 58 69 49 55 49
NOx a gas ppm 67 71 54 52 54
Max. light oil smoke flow rate m³/h 1.810 2.210 2.436 2.801 3.209
Max. methane smoke flow rate m³/h 1.631 2.004 2.140 2.540 2.909
Light oil burning air volume (practice) m³/h 979 1.166 1.331 1.478 1.693
Methane burning air volume (practice) m³/h 902 1.038 1.220 1.316 1.507
Combustion chamber dimensions (DiameterxLenght) mm
718 × 1500 718 × 1670 820 × 1750 820 × 1750 820 × 2000
Thermostat adjustment range °C 55 ÷ 80 55 ÷ 80 55 ÷ 80 55 ÷ 80 55 ÷ 80
Output
Fornace output
Thermal load
Thermal output