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Manafacture: Lochinvar File size: 439.08 kb File name: AOSDG25300.pdf Language of manual:

Each unit features a small footprint with a built-in draft diverter for extra clearance to simplify installation. Reliable, quiet, drawermounted stainless steel burners resist corrosion, improve access for easy maintenance. FEATURES 100% ALL NON-FERROUS HEAT EXCHANGER WATERWAYS of individual tubes GASKETLESS WET SECTION positioned away from and outside the combustion chamber DRAWER-MOUNTED, STAINLESS STEEL DURA-MAX® BURNERS COMPACT, LOW-PROFILE DESIGN INTERMITTENT ELECTRONIC IGNITION FACTORY-MOUNTED BRONZE-FITTED PUMP reduces standby heat loss MAXIMUM HYDROSTATIC WORKING PRESSURE: 160 PSI MEETS CURRENT EDITION ASHRAE/IESNA 90.1 FIVE-YEAR HEAT EXCHANGER LIMITED WARRANTY MODELS DW-720 through DW-1810 July 2011R Domestic Hot Water Boilers OTHER DURA-MAX® FEATURES MINIMUM CLEARANCES TO COMBUSTIBLES ALL MODELS DURA-MAX® OPTIONS CM 12 18 REAR VENT Alcove INPUT AND RECOVERY MODEL NUMBER BTU INPUT PER HOUR* GPH OR LPH RECOVERY -GALLONS OR LITRES PER HOUR AT DEGREE RISE 22°C 78°C 720,000 707 1911 840,000 3122 2230 943 8920 1,080,000 1073 2902 1,210,000 3007 1203 11,381 1342 1,480,000 3880 3903 14,774 4221 1,810,000 4388 * Natural gas only July 2011R Page 2 of 4 AOSDG25300 Domestic Hot Water Boilers Revised November 2009 Page 3 of 4 AOSDG25300 INPUT/OUTPUT, FLOW RATE (GALLONS AND LITRES PER MINUTE) AND PRESSURE DROP GPM LPM GPM LPM 720,000 223 1.1 39 149 1.7 29 111 1.0 0.3 840,000 4.8 173 2.1 34 130 79 297 2.1 198 3.3 1.0 39 149 1.9 1,080,000 89 339 1.4 2.1 1.4 0.4 1,210,000 992,200 100 379 2.7 0.8 190 1,107,000 112 423 2.1 282 3.2 1.0 212 1.8 1,490,000 1,184,000 120 7.9 2.4 80 302 3.9 1.2 2.1 1,288,000 130 492 2.9 87 328 3.0 0.9 1,810,000 1,448,000 12.0 3.7 98 1.9 73 277 3.9 1.2 Pressure drop shown is loss through boiler only, and does not include any additional piping. DIMENSIONS AND SHIPPING WEIGHTS MODEL NUMBER INCHES OR CM DIMENSIONS SHIPPING A B C D E F G H L M N P WEIGHT 1 12 780 Lbs. CM 118.1 139.1 3.2 19.7 39.4 43.8 10.8 39.4 1 14 CM 139.1 3.2 19.7 39.4 43.8 10.8 41.9 79.1 431 Kg 1 14 CM 139.1 3.2 19.7 39.4 43.8 10.8 41.9 431 Kg 4 1000 Lbs. CM 134.3 83.2 147.3 3.2 19.1 47 47.1 10.2 3.2 43.8 4 CM 83.2 147.3 3.8 19.1 47 47.1 10.2 3.2 43.8 488 Kg 4 18 11 00 Lbs. CM 83.2 147.3 3.8 19.1 47 47.1 10.2 3.2 499 Kg 34 18 31 CM 3.8 19.1 47 11.4 3.2 34.9 78.7 34 2 18 31 CM 19.1 47 11.4 3.2 34.9 78.7 34 2 20 31 CM 19.1 47 11.4 3.2 34.9 78.7 July 2011R Domestic Hot Water Boilers SUGGESTED SPECIFICATION The hot water supply boiler(s) shall be A. O. Smith Dura-Max® model DW ______ with an input rating of ______ BTU/hr and a recovery rating of ________________ BTU/hr at 100°F temperature rise. The boiler(s) shall be design-tested and certified to the ANSI Z21.13 standard, approved by CSA International and shall carry the ASME “H” Symbol. The wet section shall be design-registered in accordance with the requirements of the ASME Code and shall carry an appropriate National Board Number or Canadian Registration Number. All waterways ...

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