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AB Water Boiler - Sample Specification - Bryan Boilers

By Gilbert Campbell,2014-07-13 18:11
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AB Water Boiler - Sample Specification - Bryan Boilers

AB Series

    Water Boilers

    Forced Draft Gas, Oil, Gas/Oil Fired

    The boiler shall be a Bryan Model ___________ allow for inspection of the interior chamber and flexible water tube boiler, with a capacity of the burner head. All panels shall be individually ______ BTUH input and ______ BTUH output. removable. All access panels shall be affixed to (__________ HP) the pressure vessel frame and insulated with 2”

     mineral fiber mono block and 2” high The boiler shall be constructed and assembled temperature ceramic blanket insulation and be as a completely packaged unit ready for field fully gasketed for pressurized firing. connections to the water supply, return connection, electrical power supply, fuel The furnace/combustion chamber shall be supply(s), relief valve discharge, building primarily of water-wall design with one side of management controls and flue-gas vent. removable panels. The stationary interior wall shall be lined with 1” mineral fiber mono block The water boiler shall be manufactured in strict and 1” ceramic blanket insulation. The front accordance with the ASME Heating Boiler Code, and rear walls are insulated with 4” mineral Section IV, and shall bear the ASME “H” stamp fiber mono block and 2” ceramic blanket. The for a maximum working pressure of 160 PSIG at floor beneath the tubes shall be lined with 2” o250F temperature. mineral fiber mono block insulation and 2” ceramic blanket. The boiler The boiler shall also be built to withstand 150 furnace/combustion chamber and flueways degree delta “T”. shall be designed to operate at a positive 0.25” w.c. at the boiler flue outlet. The boiler will (Also available for higher pressures up to 250 orequire a “positive pressure” type metal flue. PSIG and temperatures to 300F per ASME

     Section I)

    JACKET CONSTRUCTION

    The boiler shall have no less than 5 sq. feet of

    heating surface per boiler horsepower. The boiler shall be complete with a metal jacket,

     16 gauge, zinc-coated rust resistant steel casing,

    finished with a suitable heat resisting paint and VESSEL AND TUBE CONSTRUCTION

    shall be constructed on a structural steel frame

    and properly insulated with no less than 1 ?” The boiler shall be constructed on a heavy steel fiberglass insulation. Complete jacket and frame. The boiler pressure vessel shall be insulation shall be easily removable and provided with adequately sized upper and lower reinstalled. The boiler shall incorporate drums. A minimum of two downcomers shall be individually removable jacket doors, with handles provided and shall be located inside the furnace providing easy access to combustion chamber chamber to maximize proper thermal internal and access panels. The entire tube area shall water circulation. No external water circulation be easily accessible for fireside cleaning. source shall be required. Steel water tubes are to be 1" O.D., .095 wall thickness, six-pass, flexible All appropriate controls where possible, shall be serpentine bend design, not subject to thermal mounted on boiler front. shock damage. Individual water tubes shall be easily removable and replaceable without either A tube removal and replacement shall be welding or rolling. The boiler shall have no more demonstrated at time of start-up. Demonstration than two tube configurations. The boiler shall be time not to exceed 40 minutes. furnished with an adequate number of tappings and inspection openings to facilitate internal boiler The boiler vessel shall be warranted for 25 years inspection and cleaning. against thermal shock on a non-pro-rated basis. FURNACE/COMBUSTION CHAMBER

     CONSTRUCTION

     Access to the furnace/combustion chamber is

     gained by an access door(s) with an opening of

    (Continued on Page 2) no less than 28" wide x 50" high maximum to

    Form 2014 Rev 07/01/04 Repl 01/01/04 ; Page 1 of 2

AB Series

    Water Boilers

    Forced Draft Gas, Oil, Gas/Oil Fired

    BOILER TRIM AND CONTROL EQUIPMENT DUAL FUEL GAS/OIL BURNER AND CONTROL

    EQUIPMENT

    1. Combination thermometer and pressure gauge

    2. Water temperature control operator Boiler shall be furnished with a UL listed forced draft, 3. High limit safety control pressure atomizing, dual fuel burner, suitable for 4. Low water cutoff operation with No. 2 fuel oil and natural gas (or other 5. ASME safety relief valve(s) gas). Burner shall be complete with integral motor and

     blower for supplying sufficient combustion air with

    normal vent conditions. GAS BURNER AND CONTROL EQUIPMENT The following controls shall be furnished: Boiler shall be furnished with a UL listed forced draft

    flame retention gas burner. Burner shall be complete 1. Same equipment as gas burner with integral motor and blower for supplying sufficient 2. Same equipment as oil burner combustion air with normal vent conditions. 3. Gas pilot ignition assembly for both gas & oil ignitions The following controls shall be furnished: 4. Manual fuel selection switch 1. Main manual gas shutoff valves OPTIONAL BOILER TRIM & CONTROLS 2. Electric gas valve operator and auxiliary safety shutoff gas valve (AB90 to AB200) 1. Manual reset type high limit 3. Motorized gas valve operator and auxiliary safety 2. Manual reset type low water cutoff shutoff gas valve (AB250 & AB300) 3. Auxiliary low water cutoff(s) 4. High and low gas pressure switches (AB300) 4. Low water cutoff feeder (in addition to, or in place 5. Gas pilot shutoff and solenoid valves of standard low water cutoff) 6. Gas pilot ignition assembly with ignition 5. UL, IRI, CSD-1, FM or other insurance transformer requirements 7. Pilot and main gas pressure regulators 6. Barometric damper 8. Burner mounted control panel furnished with: 7. Indirect water heating coils for domestic, pool or - Two indicator lights - power and fuel process hot water - Air safety switch 8. Other controls and boiler trim, as specified - Fused on / off switch - Honeywell electronic combustion safety control OPTIONAL BURNER CONTROLS AND ACCESSORIES OIL BURNER AND CONTROL EQUIPMENT 1. Two-stage high-low burner with proven LFS Boiler shall be furnished with a UL listed forced draft, controls pressure atomizing type oil burner, suitable for 2. Modulating burner operation with No. 2 fuel oil. Burner shall be complete 3. Auxiliary motorized safety shut off gas valve with integral motor and blower for supplying sufficient 4. Alarm bell(s) or horn(s) combustion air with normal vent conditions. 5. Fireye combustion safety control 6. UL, IRI, CSD-1, FM or other insurance The following controls shall be furnished: requirements

    1. Oil valves primary and auxiliary 7. Indicator lights as specified

    2. Ignition transformer 8. Direct spark ignition of oil (dual fuel burners) 3. Oil ignition and nozzle assembly 9. Boiler skid mounted burner control panel 4. Two stage fuel unit burner mounted 10. Boiler skid mounted burner oil pump set 5. Burner mounted control panel furnished with: 11. Lead lag systems for two or more boilers

     - Two indicator lights power and fuel 12. Sub 30 PPM Lo Nox burner

     - Fused on / off switch 13. Other controls, as specified

     - Honeywell electronic combustion safety control

Form 2014 Rev 07/01/04 Repl 01/01/04 ; Page 2 of 2

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