Document MMgQOXgOMj7LyVVL41BXkBZ7j

PFA-5 FORCED DRAFT BOILERS 15416 BOILER BURNERS More effective circulation in the PFA-5 produces the highest tankless heater ratings. Each heater can provide up to 8 GPM of continuous flow of hot water at 100 rise. Actually superior internal circulation of the PFA-5 permits utilizing the entire boiler output for hot water service. A refractory firewall serves as a builtin thermal pump to improve internal circulation. Because of the built-in firewall, heat transfer is greater on one side of the boiler. This modification produces an upward flow on the side where the heat transfer is greater, and a downward movement on the side where heat transfer is lower. The end result is a superior circulation enabling rapid release of dry steam. The versatility of the PFA-5 is also evident in the variety of firing methods available. Light oil burners, gas burners or combination gas/light oil burners can be provided to take advantage of any fuel economically available in any particular area. Basic unit design makes possible an operating efficiency of over 80% for all fuels, compared to that of about 75% for boilers of ordinary design. 15417 3 INSTALLATION highly recommended form of shipment to eliminate risk of damage to jacket and burner. Package--a completely assembled package, including jacket and burner The versatile design of the PFA-5 boiler offers real economies in assembly time and handling... and Package shipment also requires crane unloading and handling at the job site Extreme caution must be exercised with this method of shipping, due to can be ordered and shipped in the possible damage to jacket and burner form best suited to meet any while in transit. installation conditions. Available in three basic forms, the PFA-5 boiler can be shipped as: Gas-tight sealing, which is imperative for forced draft boilers, is achieved with the application of an elastic Knockdown-sections and related sealant. The sealant is applied into the Pressure relief door, located on the parts are shipped loose for easy grooves of each section with a caulking back section, contains a sight glass handling through restricted building gun. to insure proper sealing of section which allows viewing of burner flame openings. Final assembly is completed joints and canopy connection. This characteristics. There is also a tapped at the job site. method of sealing (patent pending) 1/8" hole for measuring combustion pressure. All controls and burners are front- Factory Assembled --sections including sealed canopy are assembled at the factory with jacket and burner shipped saves installation time compared to the ordinary asbestos-rope gasketing method. mounted on the boiler, to facilitate separately for semi-field assembly. The superior airtight seal maintains its installation, maintenance and The PFA-5 shipped in this manner integrity over years of service, while adjustment. Front burner plate also requires crane unloading and handling ordinary methods with less resilient incorporates a shutter-type sight glass. at installation site. However, it is the materials may often develop leaks. 4 15418 r FRONT-MOUNTED CONTROLS INTERNAL. TANKLESSTYPE WATER HEATER GLASS FIBER INSULATION TO PREVENT HEAT LOSS OPTIONAL. ACOUSTICALLY TREATED JACKET EXTENSION BURNER PLATE WITH SHUTTER-TYPE SIGHT GLASS L IJ 11 'r^^======^'? . II , . tf9 : f;/.. GAS. LIGHT OIL OR GAS/LIGHT OIL BURNERS - V\ WET-BASE . CONSTRUCTION FOR EXTRA HEAT-ABSORBING SURFACE 5 15419 FIELD ASSEMBLY START-UP Assembly of boiler sections is easily accomplished with the aid of a hydraulic draw-up tool. This easy-touse tool allows assembly to be completed in one-third the normal installation time. Ten tons of hydraulic pressure assure that sections are drawn up. iron to iron, eliminating any chance of cocked nipples, which generally cause the majority of installation problems. Professional start-up of boilers provides on-site fire-testing under actual operating conditions. Other boilers are simply fire-tested at the factory, under simulated conditions One-year service is included in the trade price of gas and gas/light oil burner units. This service is optional for oil-fired units. 6 15420 OPTIONAL EQUIPMENT Acoustically treated jacket extensions, with removable front panel for access to burners and controls, are optional. Optional equipment is available to meet special requirements including: Factory Mutual Factory Insurance Association Hi-Lo Fire Control Modulated Fire Control and various other controls to meet local requirements. ADVANTAGES PFA-5 advantages over steel boilers Less space required for comparable heating--almost 50% less in comparison to even the most compact steel packaged boilers. No thermal shock problems to worry about. No tubes to replace or reroll for leaks ... and elimination of space requirement for tube removal. Cast iron is a corrosionresistant material which can be molded into the most efficient heat transfer forms. Components are easier to replace 50 psi working pressure is standard PFA-5 advantages over other cast iron boilers Ease of assembly on job site. Lower in height. Lower pressure drops incurred Rapid steam release. Efficient section design produces dry steam--eliminates operational problems caused by wet steam. Easier to clean. Vertical flue design. Exclusive thermal pump (patent pending) provides better circulation and heating. Lighter weight for ease of handling Sets up in fraction of time normally required for other boiler models. 15421 7 o PFA-5 ratings boiler boiler numbers* HP. gross l=B=R output (Bluh) piping end pickup lector steam water net l=rB = R rating Mbh steam water SQ. ft. steam l=B - n burner capacity light oil gas (gph) (mbh) gas pressure required* (inches water column) healing surface (It-*) net firebox volume (It.*) pressure in firebox^ (inches water column) water content full (lbs.) l=B = R venl diameter (inches) PFA-504 18.5 620.000 1.333 1.15 465.1 539.1 1938 5.45 763 PFA-505 234 786,000 1.333 1.15 589 6 683.5 2457 6.90 966 PFA-506 284 950.000 1.333 1.15 712.7 826.1 2969 8.35 1169 PFA-507 33.3 1.116.000 1.333 1.15 837.2 970.4 3488 9.80 1372 PFA-508 38 2 1.282.000 1.330 1.15 963.9 1114.8 4016 11.20 1568 PFA-509 43.2 1.446.000 1.315 1.15 1099 6 1257.4 4582 12.65 1771 PFA-510 48.2 1.612.000 1 302 1.15 1238 1 1401.7 5159 14.00 1960 PFA-511 53 1 1.776.000 1.292 1.15 1374 6 1544 3 5728 15 55 2177 PFA-512 58 1 1.944.000 1.288 1.15 1509.3 1690 4 6289 16.95 2373 PFA-513 63.0 2.108.000 1.288 1.15 1636.6 1833 0 6819 18.40 2576 PFA-514 67 9 2,272.000 1.288 115 1764.0 1975 7 7350 19 85 2779 PFA-515 72.9 2.440.000 1.288 1 15 1894.4 2121 7 7893 21.25 2975 PFA-516 77 8 2.604.000 1.288 1 15 2021 7 2264 3 PFA-517 82 7 2.768.000 1.288 1 15 2149 1 2407.0 8424 22.70 3178 8954 24.15 3381 PFA-518 87.7 2.936.000 1 288 1 15 2279 5 2553 0 9498 25 60 3584 PFA-519 92 6 3.100.000 1.288 1 15 2406 8 2695 7 10028 27.00 3780 PFA-520 97 4 3.260.000 1 288 1 15 2531 1 2834 8 10546 28 45 3983 PFA-521 102 5 3.430.000 1 288 1 15 2663 0 2982 6 11096 29 90 4186 5.2 6.4 66 6.7 6.4 65 60 56 66 63 61 57 6.1 55 62 62 68 75 66 8.5 85 11.1 104 13.7 123 16.3 142 18.9 161 21.5 179 24.1 198 26.8 217 294 236 32.0 255 34 6 274 37.2 293 39 8 312 42 4 330 45 0 349 47.6 368 50 2 387 52.8 .244 .244 .245 245 .246 .246 .247 .247 .248 248 .249 .249 250 250 .251 251 252 252 581 700 818 937 1056 1174 1293 1412 1530 1649 1768 1886 2005 2123 2242 2361 2479 2598 10 10 10 10 10 14 14 14 14 14 14 14 18 18 18 18 18 18 l Suffix S' indicates steam boiler. "W ' indicates water boiler Suffix G- indicates gas-fired. O" indicates oil-fired. GO ndicates combination gas-oil fired Minimum gas pressure reauired at std gas tram inlet for maximum burner input based on 1000 Btu/cu ft 0 60 aoecific gravity gas ^Witn positive pressure of 0 10 inches water column m boiler flue outlet 0 AMERICAN STANDARD Form No 70276-2 (12/70) J litho in U S A 15422