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User manual Lochinvar, model GW/GWO-300

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O. Smith representative, or online at MODEL BTU INPUT RECOVERY — GALLONS PER HOUR AT °F TEMPERATURE RISE NUMBER PER HOUR 40° 50° 60° 70° 80° 90° 100° 110° 120° 130° 140° GW/GWO-300 300,000 761 609 507 435 380 338 304 277 254 234 217 GW/GWO-400 399,900 1014 811 676 580 507 451 406 369 338 312 290 GW/GWO-500 500,000 1268 1015 845 725 634 564 507 461 423 390 362 GW/GWO-650 650,000 1649 1319 1099 942 824 733 659 600 600 507 471 GW/GWO-750 750,000 1902 1522 1268 1087 951 845 761 692 634 585 544 Gas Supply Pressure: 13.8” W.C. maximum natural and propane; 4.5” W.C. minimum natural; 11.0” W.C. minimum propane. Genesis boilers are approved for installation on noncombustible flooring in an alcove with minimum clearance to combustibles of: 3 inches sides, and back; 3 inches top, front alcove; 6 inches vent. For installation on combustible flooring use the optional Combustible Floor Kit. Genesis boilers must be connected to a single phase dedicated line source that is: 120 volts, 60 hertz and 20 amps. Revised October 2012 PG 3 OF 4 AOSDG25200 Commercial Gas Boilers SUGGESTED SPECIFICATION The hot water supply boiler(s) shall be an A. O. Smith Genesis® Model GW ___________________ having an input rating of __________________ BTU/hr. and capable of supplying no less than _________________GPH at a 100.F temperature rise when fired with Natural/Propane gas. The boiler shall bear the ASME “H” stamp and shall be National Board registered for 160 PSI working pressure. The boiler shall be test certified at 84% thermal efficiency by CSA per ANSI Z21.13/CSA 4.9 Harmonized Standard Latest Addenda. The boiler’s copper fin tube heat exchanger shall be a horizontal, single row, two pass design. The solid copper tubes shall have integral extruded copper fins spaced at “7” fins per inch, and be rolled into heavy steel tube sheets. High temperature silicone “O” rings shall provide a watertight seal between each tube and the ASME code Bronze/Cast Iron headers. Headers must be field removable to allow complete inspection of all waterways. Non-removable headers, with tubes rolled directly into the headers, shall not be acceptable. The low mass, low water volume heat exchanger shall be explosion-proof and immune to thermal shock. The combustion chamber shall be fully lined with high temperature ceramic fiber insulation, rated to 2,300°F. The jacket panels shall be coated with a baked-on powder-coat finish, suitable for outdoor service. The jacket shall be of tight construction, and weather- and water-resistant. The hot water supply boiler(s) shall be supplied with a factory supplied, sized and wired boiler-circulating pump. The boiler shall employ a fan induced premixed multi-burner system firing into a pressurized combustion chamber. Atmospheric or power burners will not be acceptable. Only stainless steel/titanium alloy burners will be acceptable. All boiler functions shall be controlled, operated, and monitored by a microprocessor-based con...