M K. MK is a pressurized steel boiler for heating system with hot water production up 90 C. High efficiency

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M K MK is a pressurized steel boiler for heating system with hot water production up 90 C. High efficiency Gas/ gas oil working Output from 44 to 291,7 (from 37.840 to 250.862 of water efficiency). Pipe thickness 4

SMOKE PATH The flame inversion furnace and the effect of the refractory irradiating of the frontal door allows an extremely high degree of pulverization of the combustion particles. The use of retarders (turbolators), inserted in the smoke pipes, permits to reduce the temperature of the output burnt gasses to the minimum level allowed by the smoke flue. finishing the hydraulics connections in the heating plant. FREE FURNACE The MK boiler furnace is not fixed to the back plate and as consequence it has a free mechanics structure; therefore the furnace can expand itself without causing dangerous stresses on the pipe plates. COMPLETELY ADJUSTABLE DOOR The door is completely adjustable with refractory coating; it is necessary that the door assures a perfect gas tight, because the combustion chamber is lightly in pressure, so each minimum crack could cause a leakage of high temperature gas. For this reason the structure of the MK boiler s door is well-studied in order to allow all the possible adjustments: it means that the door can be risen, pulled down, inclined and opened on the right as well as on the left side, thanks to the interchange ability of the supports INSULATION The complete insulation is executed with the greatest accuracy in order to avoid any possible passive heat leakages. It is made of 80 thick glass fibre insulation pad, directly placed in contact with the body boiler. COMPLETE JACKET The casing include also the back side of the boiler MK, so the jacket covers also the smoke chamber and the back plate: it has been projected to be installed after

*position of the lock connection for the boiler model MK 220 280 Legend 1. control board ar. return heating water ac. chimney connection 2. burner flange connections am heating water flow ab. burner connection 3. flame control light as. waste 4. cleaning door as* waste model 220-300 MK BOILER DIMENSION Model Ø-DN Ø Ø Ø A B C G H N R S T ar-am ac ab as 55 670 790 1020 110 640 310 500 595 710 1 1/2" 200 120 1/2 70 670 790 1020 110 640 310 500 595 710 1 1/2" 200 120 1/2 80 670 790 1020 110 640 310 500 595 710 1 1/2" 200 120 1/2 90 730 890 1210 110 720 310 580 660 890 2" 200 150 1/2 100 730 890 1210 110 720 310 580 660 890 2" 200 150 1/2 120 730 890 1210 110 720 310 580 660 890 2" 200 150 1/2 140 730 890 1390 110 720 310 580 660 1070 2" 200 150 1/2 170 730 890 1390 110 720 310 580 660 1070 2" 200 150 1/2 230 850 1010 1430 135 / 380 610 780 1110 65 250 185 1" 300 850 1010 1680 135 / 380 610 780 1360 65 250 185 1"

MAIN FEATURES Pressurized steel boiler for heating system and water production up to 90 C. Useful Output: from 44 to 269 (from 37.840 to 250.160 ). Functioning: gas, gas oil. Cylindrical furnace with inversion flame, detached from the back duct plate and arc welded on a copper bar. Steel boiler body Fe360 UNI EN 10025/92,completely electro welded in a CO 2 controlled atmosphere. Steel duct bundle Fe360D UNI EN 10204/2.2, 4 thickness. Completely adjustable door allowing a perfect combustion product tightness. Epoxy enamelled boiler jacket, 80 thick glass fibre insulation pad to reduce passive heat leakages. The electric switchboard is outside the jacket and is fitted with an operating thermostat, a manual reset safety thermostat, thermometer, a minimal temperature thermostat on the circulating pump, an anti-inertia thermostat, general switch, a circulating pump switch and burner switch. Rubber sheath with IP 40 minimal protection level. Model MK 55 MK 70 MK 80 MK 90 MK 100 Output 44 58 37.840 49.880 50 70 43.000 60.200 62 81,5 53.320 70.090 75 93,1 64.500 80.066 90 105 77.400 90.300 Hearth capacity Kcal/h 48 63,5 41.280 54.954 54 76.5 46.440 65.790 67 89 57.620 76.540 80,5 101,9 69.230 87.634 97 114,7 83.420 98.642 Combustion chamber volume m 3 0,056 0,056 0,056 0,100 0,100 Thermal charge /m 3 kca/hm 3 1.141 981.321 1.366 1.174.821 1.589 1.366.785 1.019 876.340 1.147 986.420 Changer surface m 2 2,7 2,7 2,7 4,3 4,3 Thermal efficiency /m 2 m 2 21,5 20.353 26 22.296 30,2 25.959 21,6 18.620 24,4 21.000 Smoke tubes number 18 18 18 23 23 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 200 220 220 300 310 Capacity boiler l 90 90 90 140 140 Working pressure bar 5 5 5 5 5 Hydraulic proof pressure bar 7,5 7,5 7,5 7,5 7,5 Max. working temperature C 95 95 95 95 95 Combustion chamber pressure mbar 0,12 0,15 0,2 0,24 0,36 Min. efficiency at 100%** % 87,5 87,7 87,8 87,9 88 Efficiency at 100% in useful field % 90,7 91,5 91,5 91,3 91,5 Min. efficiency at 30% % 85,3 85,5 85,8 85,9 86,1 Efficiency at 30% 88,5 88,9 89 89,3 90,1 Working burner loss % 8,2 7,48 7,45 7,61 7,35 Burnt-out burner loss % 0,28 0,3 0,26 0,32 0,26 Shell loss ** % 1,1 1,02 1,05 1,09 1,15 Burner connection (Ø) 125 125 125 150 150 Hearth connection (Ø) 200 200 200 200 200 Min. hearth depression mbar 0,2 0,2 0,2 0,2 0,2 Max. smoke temperature C 180 185 188 181 185 Smoke temperature in capacity field C 141 180 148 185 151 188 146 181 155 185 CO2 on gas % 9,8 9,7 10 9,6 9,75 CO on gas ppm 27 24 22 25 19 Nox on gas ppm 43 39 42 45 40 Max. gas oil smoke capacity m 3 /h 15 180 210 240 270 Max. methane gas smoke capacity m 3 /h 133 159 185 212 239 Combustion chamber diameter Ø 76 90 105 120 136 Thermostat regulation field C 55 80 55 80 55 80 55 80 55 80

Model MK 120 MK 140 MK 170 MK 230 MK 300 Useful capacity 102 122,2 87.720 105.092 120 140 103.200 120.400 145 174,5 124.700 150.070 174 233 149.640 200.380 220 291 189.200 250.160 Hearth capacity 110 133,3 94.600 114.638 130 153 111.800 131.580 157 191 135.020 164.260 188 253,8 161.680 218.268 237 319 203.820 274.340 Combustion chamber volume 0,100 0,121 0,121 0,190 0,235 m 3 Thermal charge /m 3 kca/hm 3 1.333 1.146.380 1.264,4 1.087.384 1.578 1.357.520 1.335 1.148.778 1.357 1.167.404 Changer surface m 2 4,3 5,1 5,1 6,5 7,9 Thermal efficiency /m 2 Kcal/hm 2 28,4 24.440 27,4 23.564 34,2 29.425 35,8 30.827 36,8 31.678 Smoke tubes number 23 23 23 28 28 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 310 340 340 410 460 Capacity boiler l 140 180 180 280 300 Working pressure bar 5 5 5 5 5 Hydraulic proof pressure bar 7,5 7,5 7,5 7,5 7,5 Max. working temperature C 95 95 95 95 95 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% in useful field 91,6 91,3 91,3 91,8 91,2 % Min. efficiency at 30% % 86,3 83,5 86,8 87,1 87,2 Efficiency at 30% 92,8 92,5 92,6 93 93,5 Working burner loss % 7,67 7,66 7,58 7,18 7,84 Burnt-out burner loss % 0,25 0,29 0,22 0,24 0,26 Shell loss ** % 1,13 1,04 1,12 1,02 0,96 Burner connection (Ø) 150 150 150 185 185 Hearth connection (Ø) 200 200 200 250 250 Min. hearth depression mbar 0,2 0,2 0,2 0,2 0,2 Max. smoke temperature C 196 186 188 182 198 Smoke temp. in capacity field C 169 196 145 186 150 188 142 182 144 198 CO2 on gas % 10,2 10,5 9,9 9,7 10 CO on gas ppm 28 26 22 16 21 Nox on gas ppm 48 42 50 44 49 Max. gas oil smoke capacity m 3 /h 314 373 453 599 756 Max. methane gas smoke capacity m 3 /h 278 338 411 531 665 Combustion chamber diameter 390x830 390x1.010 390x1.010 468x10.50 468x1.300 Thermostat regulation field C 55 80 55 80 55 80 55 80 55 80 * p.d.c. water side relative to t=15 C ** minimum output required by CE certify *** loss at the jacket with t=50 C

PRK PRK is a pressurized steel boiler for heating system with hot water production up 90 C. High efficiency Gas/ gas oil working Output from 260 to 3500 (from 223.600 to 3.010.000 of water efficiency). Pipes thickness: 4

SMOKE PATH The flame inversion furnace and the effect of the refractory irradiating of the frontal door allows an extremely high degree of pulverization of the combustion particles. The use of retarders (turbolators), put in the smoke pipes, permits to reduce the temperature of the output burnt gasses to the minimum level allowed by the smoke flue FREE FURNACE The PRK boiler furnace is not fixed to the back plate and as consequence it has a free mechanics structure; therefore the furnace can expand itself without causing dangerous stresses on the pipe plates. COMPLETELY ADJUSTABLE DOOR The door is completely adjustable with refractory coating; it is necessary that the door assures a perfect gas tight, because the combustion chamber is lightly in pressure, so each minimum crack could cause a leakage of high temperature gas. For this reason the structure of the PRK boiler s door is well-studied in order to allow all the possible adjustments: it means that the door can be risen, pulled down, inclined and opened on the right as well as on the left side, thanks to the interchange ability of the supports INSULATION The complete insulation is executed with the greatest accuracy in order to avoid any possible passive heat leakages. It is made of 80 thick glass fibre insulation pad, directly placed in contact with the body boiler.

* from PRK 1050 to PRK 2350 the m level lower than h ; the av connection is between ar and am Legend 1. control panel ar. return connection ac. Chimney connection 2. burner flange connections am. Flow connection ab. burner connection 3. flame control light av safety valve or expansion tank as. muddy waste connection 4. cleaning door connection PRK BOILER DIMENSION Model A B C D G H M N R S T Ø-DN ar-am Ø DN av Ø DN as Ø ac Ø ac 350 920 1105 1765 1415 640 540 835 500 790 850 1375 80 2" 1" 250 210 400 920 1105 1900 1555 640 680 975 500 790 850 1515 80 2" 1" 250 210 500 1100 1245 1805 1410 720 450 770 650 850 1030 1365 100 2 1/2" 1 1/4" 300 240 600 1100 1245 2170 1780 720 800 1120 650 850 1030 1715 100 2 1/2" 1 1/4" 300 240 740 1215 1300 2125 1660 760 620 970 700 920 1125 1615 125 2 1/2" 1 1/4" 350 240 830 1215 1300 2325 1910 760 870 1220 700 920 1125 1865 125 2 1/2" 1 1/4" 350 240 940 1410 1450 2450 1960 850 1125 575 750 790 1320 1920 125 3" 1 1/2" 400 305 1050 1410 1450 2450 1960 850 1125 575 750 790 1320 1920 125 3" 1 1/2" 400 305 1200 1410 1450 2850 2360 850 1450 750 750 790 1320 2320 125 3" 1 1/2" 400 305 1450 1480 1580 3320 2765 900 1830 950 830 800 1400 2720 150 100 1 1/2" 450 320 1850 1590 1700 3600 3005 900 2030 1015 900 900 1500 2960 150 100 1 1/2" 500 345 2350 1690 1850 3600 3005 900 1230 1722 970 970 1600 2960 200 100 1 1/2" 550 345 3000 1910 2065 3680 2965 920 1200 1780 1095 1095 1830 2920 200 125 2" 650 370 3500 1910 2065 4140 3280 900 1320 1900 1095 1095 1830 3230 250 125 2" 620 370

MAIN FEATURES Pressurized steel boiler for heating system and water production up to 90 C. Useful Output: from 260 to 3500 (from 223.600 to 3.010.000 ). Functioning: gas, gas oil. Cylindrical furnace with inversion flame, detached from the back duct plate and arc welded on a copper bar. Steel boiler body S 235 J RG 2 UNI EN 10.027/1, completely electro welded in a CO 2 controlled atmosphere. Steel duct bundle S 235 J RG 2 UNI EN 10.027/1.2, 4 thickness. Dispenser of the return water returning from the system towards the front duct plate allowing a better cooling and limiting carbonate and magnesium deposits. Completely adjustable door allowing a perfect combustion product tightness. Epoxy enamelled boiler jacket, 80 thick glass fibre insulation pad to reduce passive heat leakages. The electric switchboard is outside the jacket and is fitted with an operating thermostat, a manual reset safety thermostat, thermometer, a minimal temperature thermostat on the circulating pump, an anti-inertia thermostat, general switch, a circulating pump switch and burner switch. Rubber sheath with IP 40 minimal protection level. Model PRK 350 PRK 420 PRK 470 PRK 520 PRK 600 Useful o Ourput x1000 260 349 223,6 300,14 300 419 258 360,34 380 470 326,8 404,2 400 524 344 450,64 470 600 404,2 516 Hearth capacity x1000 281 379 241,6 325,94 324 457,8 278,6 393,7 410 510,5 352,6 4439,03 430 571 369,8 491,06 506 654 435,1 562,4 Combustion chamber volume m 3 0,293 0,293 0,39 0,39 0,467 Thermal charge /m 2 m 3 1.293,5 1.112.423 1.562,4 1.343.713 1.308,9 1.125.654 1.464 1.259.128 1.400,4 1.204.344 Changer surface m 2 8,3 9,3 9,7 9,7 12 Thermal efficiency /m 2 m 2 42 36.161 45 38.746 48,5 41.710 54 46.457 50 43.000 Smoke tubes number 28 30 33 33 33 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 650 740 1.070 1.070 1.250 Capacity boiler l 340 400 470 470 570 Working pressure bar 6 6 6 6 6 Hydraulic proof pressure bar 9 9 9 9 9 Max. working temperature C 95 95 95 95 95 Combustion chamber pressure mbar 2,4 3,6 3,8 4,1 4,8 Min. efficiency at 100%** % 89 89,2 89,2 89,2 89,2 Efficiency at 100% in useful field % 92 91,5 92 91,7 91,7 Min. efficiency at 30% % 87,6 87,8 87,8 87,8 87,8 Efficiency at 30% 93,6 92,8 93,4 93 93 Working burner loss % 7,38 7,8 7,45 7,65 7,65 Burnt-out burner loss % 0,25 0,24 0,2 0,22 0,22 Shell loss ** % 0,62 0,7 0,55 0,65 0,65 Burner connection (Ø) 210 210 240 240 240 Hearth connection (Ø) 250 250 300 300 300 Min. hearth depression mbar 0,2 0,2 0,2 0,2 0,2 Max. smoke temperature C 190 188 180 185 190 Smoke temperature in capacity field C 151 190 147 188 148 180 151 185 151 190 CO2 on gas % 9,8 9,7 10 9,9 9,9 CO on gas ppm 6 15 28 19 19 Nox on gas ppm 56 48 61 52 52 Max. gas oil smoke capacity m 3 /h 894 1.080 1.205 1.344 1.595 Max. methane gas smoke capacity m 3 /h 790 967 1.064 1.200 1.447 Combustion chamber diameter Ø 530x1.300 530x1.300 628x1.250 628x1.250 628x1.500 Thermostat regulation field C 55 80 55 80 55 80 55 80 55 80

Model PRK PRK PRK PRK PRK 700 830 940 1050 1200 Useful capacity x1000 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 Hearth capacity x1000 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 m 3 0,607 0,676 0,95 0,95 1,056 Thermal charge /m 2 kca/hm 3 1.251 1.076.062 1.340,2 1.152.572 1.078,9 927.894 1.208,4 1.039.224 1.245,2 1.070.872 Changer surface m 2 13,7 15,6 19,6 19,6 23 Thermal efficiency /m 2 m 2 50,9 43.816 53,2 45.752 47,9 41.244 53,5 46.010 52,1 44.806 Smoke tubes number 40 40 49 49 49 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 1.650 1.750 1.850 1.850 2.050 Capacity boiler l 620 720 1.070 1.070 1.360 Working pressure bar 6 6 6 6 6 Hydraulic proof pressure bar 9 9 9 9 9 Max. working temperature C 95 95 95 95 95 Combustion chamber pressure mbar 5,7 6,2 5,2 5,6 6,2 Min. efficiency at 100%** % 89,2 89,2 89,2 89,2 89,2 Efficiency at 100% in useful field % 91,9 91 5 91,7 91,25 91,3 Min. efficiency 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 Working burner loss % 7,65 8 7,78 8,17 8,22 Burnt-out burner loss % 0,18 0,21 0,18 0,20 0,18 Shell loss ** % 0,45 0,5 0,52 0,58 0,48 Burner connection (Ø) 240 240 305 305 305 Hearth connection (Ø) 350 350 400 400 400 Min. hearth depression mbar 0,2 0,2 0,2 0,2 0,2 Max. smoke temperature C 192 185 181 189 192 Smoke temperature in capacity field C 142 192 147 135 144 181 149 189 153 192 CO2 on gas % 10,3 10,2 10,3 9,8 10,3 CO on gas ppm 58 69 49 55 49 Nox on gas ppm 67 71 54 52 54 Max. gas oil smoke capacity m 3 /h 1.810 2.210 2.436 2.801 3.209 Max. methane gas smoke capacity m 3 /h 1.631 2.004 2.140 2.540 2.909 Combustion chamber diameter Ø 718x1.500 718x1.670 820x1.750 820x1.750 820x2.000 Thermostat regulation field C 55 80 55 80 55 80 55 80 55 80

Model PRK PRK PRK PRK PRK 1520 1870 2350 3000 3500 Useful capacity x1000 1.180 1.520 1.014,8 1.307,2 1.480 1.870 1.278,8 1608.2 1.830 2.350 1573,8 2.021 2.450 3.000 2.107 2.580 2.780 3.500 2.390,8 3.010 Hearth capacity x1000 1.270 1.664 1.092,9 1.431 1.590 2.045 1.367,4 1758,7 1.980 2.572 1.702,8 2.211,9 2.642 3.285 2.272,1 2.825,1 3.015 3.835 2.592,9 3.298,1 Combustion chamber volume m 3 1,55 1,94 2.577 3.033 3.636 Thermal charge /m 2 1.73,5 1.050,1 998 1.083 1.054,7 kca/hm 3 923.251 906.546 858.280 931.380 907.042 Changer surface m 2 33,1 41,2 49,5 57,8 71,7 Thermal efficiency /m 2 m 2 97,4 39.492 45,4 39.034 47,4 40.764 51,9 44.634 49,2 42.312 Smoke tubes number 61 71 79 83 99 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 2.610 3.220 4.010 6.030 7.240 Capacity boiler l 1.650 2.080 2.690 3.740 4.490 Working pressure bar 6 6 6 6 6 Hydraulic proof pressure bar 9 9 9 9 9 Max. working temperature C 95 95 95 95 95 Combustion chamber pressure mbar 5,8 6 6 6,5 6,8 Min. efficiency at 100%** % 89,2 89,2 89,2 89,2 89,2 Efficiency at 100% in useful field % 91,35 91,4 91,5 91,4 91,3 Min. efficiency at 30% % 87,8 87,8 87,8 87,8 87,8 Efficiency at 30% 92,8 92,9 92,9 92,5 93,2 Working burner loss % 8,22 8,2 8,12 8,21 8,29 Burnt-out burner loss % 0,17 0,20 0,18 0,2 0,16 Shell loss ** % 0,43 0,4 0,38 0,39 0,41 Burner connection (Ø) 320 370 370 370 370 Hearth connection (Ø) 450 500 550 600 700 Min. hearth depression mbar 0,2 0,2 0,2 0,2 0,2 Max. smoke temperature C 197 188 193 188 195 Smoke temperature in capacity field C 147 197 149 188 159 193 152 188 155 195 CO2 on gas % 10,2 9,8 10,4 10,2 9,9 CO on gas ppm 69 55 70 77 68 Nox on gas ppm 71 52 72 74 73 Max. gas oil smoke capacity m 3 /h 3.928 4.828 6.276 8.016 9.358 Max. methane gas smoke capacity m 3 /h 3.490 4.289 5.691 7.269 8.486 Combustion chamber Ø 880x2.550 944x2.760 1.020x2.780 1.211x2.720 1.211x3.000 Thermostat regulation field C 55 80 55 80 55 80 55 80 55 80 * p.d.c. water side relative to t=15 C ** minimum output required by CE certify *** loss at the jacket with t=50 C

TRIPLOMAT TRIPLOMAT is a pressurized steel boiler for heating system with hot water production up 90 C. Gas/ gas oil working High efficiency Output from 43,8 to 583 (from 37.668 to 501.380 ). Three effective turns of smoke Low temperature ( 35 C, DS model) Low nitrogen oxide emissions (NO X ) TRIPLOMAT MODELS N (with standard pipe) water temperature on the return 50 C DS (with double layer pipe) Working through water low temperature on return 35 C possibility of working ON OFF AN EASY INSTALLATION The smokes circuit of the TRIPLOMAT is located over the combustion chamber. This solution allows to reduce the maximum width (756 for 582 of capacity) of boiler body making easier its introduction into the thermal power station. Moreover in the TRIPLOMAT boiler all the smokes pipes are involved in the circulation of the combustion gas, so a fair distribution of the thermal load is guaranteed, in contrast with what happen in the thermal exchange surfaces of the boilers having ring-surfaces or surface under the combustion chamber.

REDUCED AZOTE OXIDE IN FUNCTION OF THE EFFECTIVE THREE SMOKE TURNS The TRIPLOMAT smokes circuit happens on three real ways, because the combustion gas inversion does not occur in the same chamber, in order to join the smokes pipes and from here the smokes-chimney chamber. The TRIPLOMAT boiler allows a remarkable reduction of the NO X emission and polluting dust in the atmosphere. The TRIPLOMAT boiler has been approved by EMPA (Sweden) and so it respects the restrictive limits imposed by the European regulations that will adopted in the near future. The boiler TRIPLOMAT can work by means of modulating burners, or multi- layers or with re-circle of part of waste gas. Using burners with re-circle it is possible to reduce the gas combustion temperature and, consequently, a further reduction of NO X. WATER CIRCUIT The water circuit follows a guided run. The water turn and return are placed in the superior side to keep away the cold water from the hearth; inside there is a ring header which delivers the return water towards the inferior side of the boiler and the anterior plate. COMPLETE ADJUSTABLE DOOR The door is characterized by a complete registration with a ceramic fibre covering; it is necessary that the door guarantees a perfect gas seal since the combustion chamber get a light pressure, hence every little crack could cause a gas loss at high temperature. For this reason the door boiler is particularly studied to all the registrations: it can be risen, pulled down, bent, opened on the right or on the left thanks to the interchangeable rests. The door is internally covered with ceramic fibre and a special intake insulation jet. INSULATION AND COMPLETE CASING The complete insulation is particularly cared in order to avoid warmth loss ; it is obtained by using 80 thick mineral wool panel. The mantle is extended as far as the back side, consequently interesting the smoke chamber and the posterior plate. The mantle is conceived in such a way as to be set up after the finishing of the hydraulics junction.

SLIDING TEMPERATURE ARCA suggests the own range of pressured boilers endowed with a special double-layer pipe and an inox steel flue gas flow breaker (DS version) to allow the boiler working on sliding temperature (taking advantage of the complete extinguishments boiler in the moment of no heating use). The optimal employment of such kind of boilers is fulfilled by means of modulating gas or gas oil burner. DRY SMOKES CHAMBER TRIPLOMAT boiler is endowed with a dry smokes chamber. A second plate separates the smokes chamber from the back wet plate and it is placed on the smokes pipes; in this way there the smokes cannot lap the wet plate avoiding the condensation phenomena. Hence the smokes chamber is dry, it does not corrode and it is easy to clean (picture C). WATER CIRCUIT The water circuit follows a guided run. The water turn and return are placed in the superior side to keep away the cold water from the hearth; inside there is a ring header which delivers the return water towards the inferior side of the boiler and the anterior plate. DOUBLE LAYER PIPE It is coon knowledge that the condensation process gets dangerous effects. For this reason ARCA has formulated a double layer pipe for the smokes run, throughout the experiences acquired in own laboratories. This pipe is obtained by pressing and it guarantees an easy functioning as a maximum reliability of working in a long time. The anti condensation function is realised by means of the temperature differential between the interior pipe (in contact with the combustion gas) and the exterior one (wet with water). Moreover the air space allows the maintenance of the temperature differential developing the anti condensation function. The thermal bridge (or pressing area) allows a proportioned transmission of the thermal energy.

Legend 1. electric panel ar. return heating ac. vertical hearth connection 2. burner plate am. heating lock ac* horizontal hearth connection 3. flame light av. safety valve or expansion tank as. waste ab. burner connection connection TRIPLOMAT BOILER DIMENSION Model A B C D E F G H I L M O P S Ø-DN aram Ø DN av Ø DN as Ø ac Ø ac 50 500 940 860 110 300 150 80 140 130 315 120 790 190 425 1 ½ 1 1 110 150 70 570 1040 1200 170 430 240 100 165 120 325 140 820 190 495 1 ½ 1 1 125 150 90 570 1040 1200 170 430 240 100 165 120 325 140 820 190 495 1 ½ 1 1 125 150 100 615 1135 1470 185 430 440 100 180 150 337 140 910 190 540 1 ½ 1 1 150 180 130 615 1135 1470 185 430 440 100 180 150 337 140 910 190 540 1 ½ 1 1 150 180 160 650 1180 1700 185 430 620 120 210 160 336 105 920 190 580 65 1 ¼ 1 ¼ 160 200 220 650 1180 1700 185 430 620 120 210 160 336 105 920 190 580 65 1 ¼ 1 ¼ 160 200 310 730 1380 1750 185 430 570 160 220 185 418 150 1120 190 660 80 1 ½ 2 180 250 380 730 1380 1985 185 430 750 200 235 185 418 150 1175 190 660 80 1 ½ 2 180 250 450 850 1390 2270 200 430 960 200 280 210 440 110 1275 190 765 100 65 1 ½ 240 300 540 850 1390 2270 200 430 960 200 280 210 440 110 1275 190 765 100 65 1 ½ 240 300

TRIPLOMAT N: MAIN FEATURES Pressurized steel boiler for heating system and water production up to 95 C. Useful capacity: from 43,8 to 582 (from 37.668 to 500.520 ). Functioning: gas, gas oil. Low nitrogen oxide issue, possibility of functioning with return temperature up to 50 C. Main hearth connected to a secondary one, released from the back pipe plate. Tube bundle made by steel tubes S 235 J RG 2 UNI EN 10.027/1, totally electrojoined in controlled CO 2 atmosphere. Tube bundle made by steel tubes S 235 J RG 2 UNI EN 10.027/1 with 4 thickness Back-water distributor from the system to the inferior boiler piece to avoid the condensation of the pipe bundle. Total registration door which allows a perfect keeping of combustion products. Complete steel sheet lacquered with epoxydic dust and insulation by means of 80 thickness wood mineral mattress. The electric regulation panel is outside the jacket. It is supplied with: working thermostat, safety thermostat with a manual reset bottom, thermometer, minimum thermostat on the circuit, ant inertia thermostat, total switch and a burner switch. The plastic cover guarantees a minimal IP 40 protection level. Model TRI N 50 TRI N 70 TRI N 90 TRI N 100 Useful capacity 43,8 49,7 37.668 42.742 47,8 69,8 41.108 60.028 59,9 89,8 51.514 77.228 80 99,9 68.800 85.914 Hearth capacity 47,5 54,5 40.850 46.870 51,8 76,4 44.548 65.704 64,2 98,2 55.212 84.452 86,3 109,2 74.218 93.912 Combustion chamber volume m 3 0,043 0,065 0,065 0,116 Thermal charge /m 2 m 3 1.267,4 1.089.964 1.275,3 1.096.758 1.1510,7 1.299.202 941,3 809.518 Changer surface m 2 1,86 3,02 3,28 4,55 Thermal efficiency /m 2 m 2 26,7 22.926 23,1 19.866 27,3 23.478 21,9 18.834 Smoke tubes number 13 14 16 18 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 270 320 330 420 Capacity boiler l 120 150 150 230 Working pressure bar 5 5 5 5 Hydraulic proof pressure bar 7,5 7,5 7,5 7,5 Max. working temperature C 95 95 95 95 Combustion chamber pressure mbar 0,1 0,3 0,5 0,7 Min. efficiency at 100%** % 87,4 87,7 87,9 88 Efficiency at 100% in useful field % 91,2 91,3 91,4 91,5 Min. efficiency at 30% % 85,2 85,6 85,9 86,1 Efficiency at 30% 91,1 91,8 92,5 92,8 Working burner loss % 7,75 7,58 7,45 7,32 Burnt-out burner loss % 0,21 0,25 0,23 0,22 Shell loss ** % 1,05 1,2 1,15 1,18 Burner connection (Ø) 110 125 125 160 Hearth connection (Ø) 150 150 150 180 Min. hearth depression mbar 0,2 0,2 0,2 0,2 Max. smoke temperature C 168 166 169 167 Smoke temperature in capacity field C 132 168 126 166 130 169 128 167 CO2 on gas % 9,7 9,6 9,75 9,6 CO on gas ppm 5 4 5 5 Nox on gas ppm 102 104 103 106 Max. gas oil smoke capacity m 3 /h 133 186 239 266 Max. methane gas smoke capacity m 3 /h 120 169 217 241 Combustion chamber diameter Ø 330x500 330x720 330x720 390x950 Thermostat regulation field C 55 80 55 80 55 80 55 80

Model TRI N 130 TRI N 160 TRI N 220 TRI N 310 Useful capacity 96,2 130,3 82.732 112.058 125,7 160,7 108.102 138.202 151,3 221,8 130.118 190.748 212,4 313 182.664 269.180 Hearth capacity 103,6 142 89.096 122.120 135 174,8 116.100 150.328 162 240 139.320 206.400 227 338,2 195.220 290.852 Combustion chamber volume m 3 0,116 0,172 0,172 0,240 Thermal charge /m 2 m 3 1.224,1 1.050.726 1.016,2 873.932 1.395,3 1.199.958 1.409,1 1.211.826 Changer surface m 2 4,55 6,47 6,47 7,36 Thermal efficiency /m 2 m 2 28,6 24.596 24,8 21.328 34,2 29.412 41,9 36.034 Smoke tubes number 18 20 20 25 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 420 560 560 760 Capacity boiler l 230 290 290 420 Working pressure bar 5 5 5 5 Hydraulic proof pressure bar 7,5 7,5 7,5 7,5 Max. working temperature C 95 95 95 95 Combustion chamber pressure mbar 20 21 27 26 Min. efficiency at 100%** % 88,3 88,4 88,7 89 Efficiency at 100% in useful field % 91,7 92 92,4 92,5 Min. efficiency at 30% % 86,4 86,7 87,1 87,5 Efficiency at 30% 93,8 94,8 96,8 96,6 Working burner loss % 7,14 6,92 6,60 6,54 Burnt-out burner loss % 0,20 0,18 0,21 0,23 Shell loss ** % 1,16 1,08 1 0,96 Burner connection (Ø) 160 160 160 180 Hearth connection (Ø) 180 200 200 250 Min. hearth depression mbar 0,2 0,2 0,2 0,2 Max. smoke temperature C 172 166 171 165 Smoke temperature in capacity field C 131 172 129 166 134 171 130 165 CO2 on gas % 9,8 9,6 9,75 9,6 CO on gas ppm 4 4 4 5 Nox on gas ppm 109 107 110 106 Max. gas oil smoke capacity m 3 /h 346 426 585 825 Max. methane gas smoke capacity m 3 /h 314 386 531 748 Combustion chamber diameter Ø 390x950 430x1.185 430x1.185 508x1.150 Thermostat regulation field C 55 80 55 80 55 80 55 80 ** minimum capacity required by CE homologation *** shell loss with t=50 C

Model TRI N 380 TRI N 460 TRI N 580 Useful capacity 294,5 384,5 253.270 330.670 365,9 465,2 314.674 400.072 447,9 582 385.194 500.520 Hearth capacity 313,8 415 269.868 356.900 389 502,5 334.540 432.150 475 631 408.500 542.660 Combustion chamber volume m 3 0,276 0,496 0,496 Thermal charge /m 2 m 3 1.503,6 1.293.096 1.013,1 871.270 1.272,1 1.094.072 Changer surface m 2 8,7 15,4 15,4 Thermal efficiency /m 2 m 2 44,1 37.926 30,2 25.978 37,7 32.501 Smoke tubes number 25 39 39 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ Weight boiler kg 850 1.240 1.240 Capacity boiler l 460 650 650 Working pressure bar 5 5 5 Hydraulic proof pressure bar 7,5 7,5 7,5 Max. working temperature C 95 95 95 Combustion chamber pressure mbar 34 24 32 Min. efficiency at 100%** % 89,2 89,2 89,2 Efficiency at 100% in useful field % 92,6 92,5 92,2 Min. efficiency at 30% % 87,8 87,8 87,8 Efficiency at 30% 96,4 96,2 96 Working burner loss % 6,64 6,72 7,06 Burnt-out burner loss % 0,19 0,21 0,18 Shell loss ** % 0,76 0,78 0,74 Burner connection (Ø) 180 250 250 Hearth connection (Ø) 250 300 300 Min. hearth depression mbar 0,2 0,2 0,2 Max. smoke temperature C 164 160 166 Smoke temperature in capacity field C 132 164 139 160 135 166 CO2 on gas % 9,8 9,9 9,6 CO on gas ppm 4 6 5 Nox on gas ppm 104 109 112 Max. gas oil smoke capacity m 3 /h 1.012 1.198 1.439 Max. methane gas smoke capacity m 3 /h 918 1.086 1.305 Combustion chamber diameter Ø 508X1.150 508X1.600 630X1.600 Thermostat regulation field C 55 80 55 80 55 80 ** minimum capacity required by CE homologation *** shell loss with t=50 C

TRIPLOMAT DS: MAIN CHARACTERISTICS Pressurized steel boiler for heating system and water production up to 95 C. Useful capacity: from 44 to 583 (from 37.840 to 501.380 ). Functioning: gas, gas oil. Low nitrogen oxide issue, possibility of functioning with return temperature up to 35 C. Main hearth connected to a secondary one, released from the back pipe plate. Tube bundle made by steel tubes S 235 J RG 2 UNI EN 10.027/1, totally electrojoined in controlled CO 2 atmosphere. Tube bundle made by steel tubes S 235 J RG 2 UNI EN 10.027/1 with 4 thickness Back-water distributor from the system to the inferior boiler piece to avoid the condensation of the pipe bundle. Total registration door which allows a perfect keeping of combustion products. Complete steel sheet lacquered with epoxydic dust and insulation by means of 80 thickness wood mineral mattress. The electric regulation panel is outside the jacket. It is supplied with: working thermostat, safety thermostat with a manual reset bottom, thermometer, minimum thermostat on the circuit, ant inertia thermostat, total switch and a burner switch. The plastic cover guarantees a minimal IP 40 protection level. Model TRI DS 50 TRI DS 70 TRI DS 90 TRI DS 100 Useful capacity 44 50 37.840 43.000 48 70 41.280 60.200 60 90 51.600 77.400 80 100 68.800 86.000 Hearth capacity 47,3 54,1 40.678 46.526 51,6 76 44.376 65.360 64,4 97,8 55.384 84.108 86 108,4 73.960 93.244 Combustion chamber volume m 3 0,043 0,065 0,065 0,116 Thermal charge /m 2 m 3 1.258,1 1.082.000 1.169,2 1.005.512 1.504,6 1.293.956 934,4 804.358 Changer surface m 2 1,86 3,02 3,28 4,55 Thermal efficiency /m 2 m 2 26,8 23.048 23,1 19.866 27,4 23.564 21,9 18.834 Smoke tubes number 12 14 16 18 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 280 340 350 450 Capacity boiler l 120 150 150 230 Working pressure bar 5 5 5 5 Hydraulic proof pressure bar 7,5 7,5 7,5 7,5 Max. working temperature C 95 95 95 95 Combustion chamber pressure mbar 0,2 0,4 0,6 0,8 Min. efficiency at 100%** % 87,4 87,7 87,9 88 Efficiency at 100% in useful field % 92,4 92,1 92 92,25 Min. efficiency at 30% % 85,2 85,6 85,9 86,1 Efficiency at 30% 91,2 91,5 92,3 92,6 Working burner loss % 6,63 6,88 6,84 6,61 Burnt-out burner loss % 0,20 0,22 0,24 0,19 Shell loss ** % 0,97 1,02 1,16 1,14 Burner connection (Ø) 110 125 125 160 Hearth connection (Ø) 150 150 150 180 Min. hearth depression mbar 0,2 0,2 0,2 0,2 Max. smoke temperature C 170 166 170 168 Smoke temperature in capacity field C 132 170 130 166 135 170 128 168 CO2 on gas % 9,9 9,6 9,7 9,9 CO on gas ppm 3 6 5 4 Nox on gas ppm 87 93 99 101 Max. gas oil smoke capacity m 3 /h 132 185 238 264 Max. methane gas smoke capacity m 3 /h 120 168 216 240 Combustion chamber diameter Ø 330x500 330x720 330x720 390x950 Thermostat regulation field C 55 80 55 80 55 80 55 80

Model TRI DS 130 TRI DS 160 TRI DS 220 TRI DS 310 Useful capacity 96 130 82.560 111.800 125 160 107.500 137.600 150 220 129.000 189.200 210 310 180.600 266.600 Hearth capacity 103,2 140,8 88.752 121.088 134,3 173 115.498 148.780 161 236,8 138.460 203.648 226 332,9 194.360 266.294 Combustion chamber volume m 3 0,116 0,172 0,172 0,240 Thermal charge /m 2 m 3 1.213,7 1.043.782 1.005,8 864.988 1.376,7 1.183.962 1.387 1.192.820 Changer surface m 2 4,55 6,47 6,47 7,36 Thermal efficiency /m 2 m 2 28,5 24.510 24,7 21.242 34 29.240 42,1 36.206 Smoke tubes number 18 20 20 25 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ 1 ½ Weight boiler kg 450 590 590 790 Capacity boiler l 230 290 290 420 Working pressure bar 5 5 5 5 Hydraulic proof pressure bar 7,5 7,5 7,5 7,5 Max. working temperature C 95 95 95 95 Combustion chamber pressure mbar 21 22 28 27 Min. efficiency at 100%** % 88,2 88,4 88,7 89 Efficiency at 100% in useful field % 92,3 92,5 92,9 93,1 Min. efficiency at 30% % 86,4 86,7 87,1 87,5 Efficiency at 30% 93,6 95 96,7 96,5 Working burner loss % 7,14 6,92 6,60 6,54 Burnt-out burner loss % 0,21 0,24 0,20 0,24 Shell loss ** % 1,05 1 0,95 0,98 Burner connection (Ø) 160 160 160 180 Hearth connection (Ø) 180 200 200 250 Min. hearth depression mbar 0,2 0,2 0,2 0,2 Max. smoke temperature C 171 164 168 164 Smoke temperature in capacity field C 134 171 127 164 138 168 131 164 CO2 on gas % 9,8 10 9,7 9,5 CO on gas ppm 6 4 5 3 Nox on gas ppm 98 104 112 105 Max. gas oil smoke capacity m 3 /h 344 424 583 822 Max. methane gas smoke capacity m 3 /h 312 384 528 745 Combustion chamber diameter Ø 390x950 430x1.185 430x1.185 508x1.150 Thermostat regulation field C 55 80 55 80 55 80 55 80 ** minimum capacity required by CE homologation *** shell loss with t=50 C

Model TRI DS 380 TRI DS 460 TRI DS 580 Useful capacity 290 380 249.400 326.800 360 466 309.600 400.760 446 583 383.560 501.380 Hearth capacity 311,8 407 268.148 350.020 380 498 326.800 428.280 473 625 406.780 537.500 Combustion chamber volume m 3 0,276 0,496 0,496 Thermal charge /m 2 m 3 1.474,6 1.268.156 1.004 863.467 1.260 1.156.280 Changer surface m 2 8,7 15,4 15,4 Thermal efficiency /m 2 m 2 44,8 38.528 30,2 26.023 37,8 32.557 Smoke tubes number 25 39 39 Smoke tubes diameter Ø 1 ½ 1 ½ 1 ½ Weight boiler kg 890 1.290 1.290 Capacity boiler l 460 650 650 Working pressure bar 5 5 5 Hydraulic proof pressure bar 7,5 7,5 7,5 Max. working temperature C 95 95 95 Combustion chamber pressure mbar 35 26 33 Min. efficiency at 100%** % 89,2 89,2 89,2 Efficiency at 100% in useful field % 93,3 93,5 93,2 Min. efficiency at 30% % 87,8 87,8 87,8 Efficiency at 30% 96,8 96 95,8 Working burner loss % 5,92 5,7 6,05 Burnt-out burner loss % 0,18 0,19 0,22 Shell loss ** % 0,78 0,8 0,75 Burner connection (Ø) 180 250 250 Hearth connection (Ø) 250 300 300 Min. hearth depression mbar 0,2 0,2 0,2 Max. smoke temperature C 162 160 168 Smoke temperature in capacity field C 130 162 124 160 126 168 CO2 on gas % 9,9 9,9 9,8 CO on gas ppm 4 6 5 Nox on gas ppm 96 97 109 Max. gas oil smoke capacity m 3 /h 1.007 1.175 1.475 Max. methane gas smoke capacity m 3 /h 914 1.044 1.310 Combustion chamber diameter Ø 508X1.360 630X1.600 630X1.600 Thermostat regulation field C 55 80 55 80 55 80 ** minimum capacity required by CE homologation *** shell loss with t=50 C