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Manafacture: Lochinvar File size: 166.38 kb File name: d3a759a3-54b1-491d-a5f7-9054337e392b.pdf Language of manual:

All water tubes are made from copper. Brazed joints orflare 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 I heat transfer 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 - Slow opening redundant gas valves ensure smooth light-off without flame roll-out or pilot outage. (Dual stage & modulation not available.) THERMAL BALANCER - Patented pump delay system that 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. AUTOMATIC SAFE CONTROLS AND ELECTRONIC 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 overheating or flame failure. Requires 120V 60Hz, maximum inlet gas pressure of 14" W.C. and activation of heater by an external temperature control. OPTIONAL POWER VENT KIT - For sidewall venting. WORKING PRESSURE - ASME approved, hydrostatically tested and certified for 160 psi (1100 kPa). * Model HW-399: 81% efficiency, Model HW-610: 80% efficiency. COMMERCIAL BOILERS HW-300 THRU HW-610 Domestic Hot Water Supply Not approved for instantaneous applications. FOR UNITS BUILT FOR U.S.A. FOR UNITS BUILT FOR CANADA HW MODELS CERTIFICATION & APPROVAL LIMITED WARRANTY OUTLINE If the heat exchanger modules should fail within 5 years, under the terms of the warranty; A.O. Smith will furnish a replacement part; installation, labor, handling and local delivery extra. THIS OUTLINE IS NOI A WARRANTY. For complete information, consult the written warranty or A.O. Smith Water Products Company. Revised December 1996 ——----- NOTE: TOP MANIFOLD HAS EXTRA OPENINGS FOR THERMOMETER 3/4“ (19MM) AND RELIEF VALVE 1“ (25MM) [HW-520 AND -610 ONLY] HW - 300 ONLY HW-610 NATURAL GAS ONLY ALL DIMENSIONS IN INCHES (MM) Models A В С D E F G H J К L M N P Q R S T Approx. Ship. Wt. Lbs. (Kgs.) HW-300 65 (1651) 43-1/4 (1099) 36 (914) 25-1/4 (641) 12 (305) 8 (203) 16-1/2 (419) 29-5/8 (753) 9 (229) 14 (356) 1-1/4 (32) 1-1/4 (3...

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