A.O. Smith HW 300 THRU HW 610 Specification Sheet
Contents
1. CONSERVATIONIST ZA SWOT 5 COMMERCIAL BOILERS HW 300 THRU HW 610 Energy Sawing Product Domestic rior Water SAROY k RA EA Not approved for instantaneous applications 82 EFFICIENCY Meets or exceeds the requirements of ASHRAE IES 90 1b 1992 FEATURES ALL NON FERROUS WATERWAYS All castings are made of Bronze or Brass All water tubes are made from copper Brazed joints or flare union construction make the heater immune to the effects of thermal shock and thermal cycling The best boiler for hot water supply EFFICIENT COPPER COIL COMBUSTION CHAMBER The combustion chamber is a heat exchanger formed from a two passage coil of tightly wound continuous copper tube Water circulating through this coil captures radiant heat A wrap of insulation on the outside of the coil retains the heat captured by the circulating water COPPER HEAT EXCHANGER Extended surface copper tube having integral helical fins on the outside The fins are extruded directly from the tube Burkay design provides a liberal heattransfer surface directly above the flame BURKAY BURNER MAXIMIZES EFFICIENCY The patented Burkay burner uses primary air injection at up to 72 individual orifices plus secondary entrainment of air Approved for installation on combustible floors as shipped from factory GAS VALVES Siow opening redundant gas valves ensure smooth light off without flame roll out or pilot outage Dual stage w amp modulati2. 1 261 1 008 840 720 630 560 _504 458 420 388 360 179 GPH 2958 1 972 1 479 1 183 986 845 739 657 592 538 493j 455 423 HW 610 ONLY Recovery capacity ratings are heater performance at an assigned 76 thermal efficiency Actual recoveries are higher NOTE To compensate for the effects of high altitude areas above 2 000 feet 610m input and output rating should be reduced approximately 4 for each 1 000 feet 305m above sea level SUGGESTED SPECIFICATIONS Boiler s for hot water supply purposes shall be Model s No as manufactured by A O Smith or an approved equal Boiler s shall be gas fired and design certified by the Canadian Gas Association or an approved accredited independent rating laboratory capable of supplying GPH LPH at 100 F 56 C temperature rise equipped to burn gas with input rating of BTUH KW hr and bearing the ASME code symbol Boiler s shall be up flow type having all non ferrous waterways and employing a copper finned heat exchanger and a tightly wound copper coil combustion chamber with 160 psi 1100 kPa working pressure rating Boiler s shall be equipped with an electric gas valve of the step opening type an adjustable limit contro which will break the electric circuit on temperature rise intermittent ignition with one 1 second shutdown in the event of pilot flame failure propane models equipped with standing pilots a gas pressure regulator pro
3. HERMOMETER 3 4 19MM AND RELIEF VALVE 1 25MM HW 520 AND 610 ONLY M OUTLET NPT N GAS INLET FEMALE NPT HW 300 ONLY TOP VIEW oF fe tL INLET NPT HW 610 NATURAL GAS ONLY ALL DIMENSIONS IN INCHES MM MAAR RAMS AMA ARNERI 1651 1099 914 641 305 203 419 753 229 356 32 32 19 676 25 257 137 127 109 1451 1146 984 686 305 254 425 800 229 356 38 38 25 699 25 286 140 127 132 1451 1146 984 686 305 254 425 800 229 356 38 38 25 699 25 286 140 127 132 1735 1429 1168 686 305 254 457 927 229 279 51 51 25 622 89 305 146 178 164 a ele ol clea gt HW 610 1702 1429 1168 686 305 305 457 927 279 51 51 25 622 89 305 146 178 164 i 2 lemlcal gol dale sell amliclal HW 610 1645 1429 1168 686 305 305 457 927 279 51 51 25 622 89 305 146 178 164 SPECIFICATIONS AND RECOVERY CAPACITIES TEMPERATURE RISE apa Selelelelelel ele e lal el alae BTUH K Rise F 20 30 70 80 100 110 120 130 140 88 GPH 1 455 970 727 582 485 416 364 323 291 264 242 224 208 116 GPH 1 935 1 290 967 774 645 553 484 430 387 352 322 298 276 123 GPH 2036 1 358 1 018 815 679 582 509 453 407 370 339 313 291 152 GPH 2 521 1 681
4. on not available R wae FOR UNITS BUILT FOR UNITS BUILT THERMAL BALANCER Patented pump delay system that FOR U S A FOR GANADA allows boiler and pump to run simultaneously but delays pump shut off at end of heating cycle to remove usable heat from the heater and reduce the scale forming tendencies of motionless hot water HW MODELS AUTOMATIC SAFE CONTROLS AND ELECTRONIC CERTIFICATION amp APPROVAL IGNITION Natural gas units have a proven pilot ignition system which provides flame failure response in under one 1 second Propane models have a Standing pilot system Redundant high limit controls and gas valves assure safe shutoff in the event of LIMITED WARRANTY OUTLINE overheating or flame failure Requires 120V 60Hz maximum inlet gas pressure of 14 W C and activation of heater by an f the heat exchanger modules should fail external temperature control within 5 years under the terms of the war ranty A O Smith will furnish a replacement OPTIONAL POWER VENT KIT For sidewall venting part installation labor handling and local delivery extra THIS OUTLINE IS NOT A WOFKING PRESSURE ASME approved hydrostatically i WARRANTY For complete information tested and certified for 160 psi 1100 kPa consult the written warranty or A O Smith Water Products Company Model HW 399 81 efficiency Model HW 610 80 efficiency Revised December 1996 A Ati nea NOTE TOP MANIFOLD HAS EXTRA OPENINGS FOR T
5. perly set for the gas to be supplied and a coil limit switch for shut off in event of excessive water temperature a thermal balancer a certified draft diverter and a fully illustrated instruction manual Certified for combustible flooring Outer jacket shall be of baked enamel finish The coil heat exchanger and burner shall have a five year limited warranty as outlined in the written warranty A O Smith Enterprises Ltd El Paso Texas Water Products Company McBee South Carolina A Subsidiary of A O Smith Corporation Seattle Washington Stratford Ontario Veldhoven The Netherlands A O Smith Corporation reserves the right to make product changes or improvements at any time without notice A 012 0C A O Smith Corp 1996 Printed in U S A
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