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Burners, Oil Branches San Carlos. Calif. San Francisco. Calif. Sacramento, Calif. Philadelphia. Pa. 940-950 Arlington Avenue, Oakland, Calif. OIL BURNERS FOR EVERY HEATING AND POWER PURPOSE EXPERIENCE The S. T. Johnson Co., established in 1904, is a pioneer in the use of liquid fuels for every heating and power purpose. PRODUCTS Manual, Semi-Automatic and fully Automatic Rotary Oil Burners built in various sizes to meet the requirements of any domestic, commercial or industrial application. Oil Fuel Combination Boiler-Burner units furnishing heat or hot water or both in com bination for homes. Gas fired Boiler-Burner units furnishing heat and domestic hot water where desirable. Combination Oil and Gas Burners for com mercial and industrial applications. ARCHITECT AND ENGINEER SERVICE Through the Johnson Engineering Depart ment your heating or power problems will be studied without obligation and full assistance given in preparing layouts and estimates. BULLETINS Loose-leaf bulletins on Johnson Oil Burners or boiler burner units and bricking and installation plans for boilers and furnaces most generally Type 30-A V--L. F. S. & M. F. Type SO-A V Johnson OH Burners Swing Easily Out of. Firing Position, Without Disconnecting Any Pipes, When It Is Desirable to Make an Inspection or Mechanical Adjustment encountered are available from the factory or Johnson distributors in principal cities. COMMERCIAL FULLY AUTOMATIC ROTARY TYPE OIL BURNERS Types 30-AV and 30-H These automatic burners are made in 5 sizes for boilers up to 41,700 sq ft of steam radiation. Controlled automatically by a thermostat, steam pressure, water tempera ture, or a combination of these devices as the application may require. . Standard ignition is electric-gas. The gas may be natural, manufactured or com pressed gas in containers. On special order electric spark ignition is available for fuels not heavier than No. 3 on iMQH SPCED CENTRIFUGAL FUEL ATOMaI HO CUP FOSITIVe FUEL SUPPLY FROM Oil PUMP ON .BURNER AIRCOOLCO MOTOR FAN AND MOTOR MOUNTED ON SHAFT SU PPORTEO BY BALL BEARINGS. INSURES SILENT CAREFREE OPERATION smaller burners. Type 30-AV uses up to No. 5 fuel without preheating and is equipped with the Johnson viscosity compensating valve fur nishing a constant flow of fuel, regardless of fuel temperatures or viscosities, to the burner without building excessive pressure in the lines or putting undue strain on the pump or motor. The valve incorporates a spring loaded floating piston with three orifices registering with delivery ports to the burner atomizer, to the suction side of the pump and to the oil return to storage. Ad justments are made by moving a lever around a notched quadrant 923 5. T. Johnson Co. Burners, Oil which changes the size of the metering orifices. Type 30-H is equipped with an automatic oil. preheater and features that make possible the efficient use of No. 6 (Bunker C) fuel oil. The preheater maintains warm oil enabling burner to start instantly at all times. Johnson Low Fire Starting and Modulated Firing Accessories. These features are incorporated in Type 30-AV LFS & MF and Type 30-H LFS & MF Johnson Burners. Also available for Type 28 Burner. Low Fire Starting automatically reduces oil and air to a minimum for starting purposes and during a short pre-determined period, increases the fuel and air to full flame, assuring smooth positive starting. Modulated Firing takes charge of the burner after full flame is established and automatically varies the flame to suit boiler demands through control of air and fuel. At shut down periods primary and secondary air are dosed thus conserving furnace heat. Fuel savings have run as high as 7 per cent with this type of operation. SEMI-AUTOMATIC TYPE 28 A manually ignited burner made in five sizes for boilers up to 41,700 sq ft of steam radiation. Built in two types--one with built-in pump for single installations, the other for use with separate Johnson pump equipment on multiple installations. Fuel oils (preheated when necessary) as heavy as No. 6 may be used. `LADDI' DU-ALL 'Laddi Du-AU Combination Boiler-Burner Unit for Small and Medium Sized Homes Furnishes heat or domestic hot water or both in combination at low cost. In the combination units fuel is only consumed for the production of domestic hot water during warm weather. Made in three sizes: 100,000, 120,000, and 140,000 Btu per hour output. `Laddi' Du-All Units rest directly on the floor. Diameter at the base is 24 in. on all three sizes, while the heights run 4H ft on No. 1, 5 ft on No. 2 and 5}4 ft on No. 3. General Specifications of `Laddi' Du-All Vertical % in. copper bearing steel boiler shell electrically welded . . . Tested to 150 lb hydrostatic pressure . . . Horizontal fire box with pre-cast refractory combustion chamber . . IX in. seamless extra heavy copper bearing steel fire tubes ... 6 in. reversible chimney connector for either top or back con nection . . . Completely insulated with mineral wool and heavy steel enameled jacket . . .Johnson Type B burner, 110 volts a.c., GO cycles. Bums Diesel fuel oil or No. 3 U. S. Standard. Unit fully assembled and tested before shipment . . . Finish of enamel in Royal Purple and Brewster Green . . . Fire tubes easily accessible. S; T. Johnson Co. Rotary Oil Burners Types 28, 30-AV, 30-H Burner Size No. Capacity Steam "Radiation, Sq Ft Min. Max. Boiler Hp Rating Cal Oil per Hour Min. Max. Size Motor Hp A Dimensions in Inches BcDE 2% 825 2775 20 m 1400 6950 50 2 7 M 14 13'/, 9%. 6% 17 3 15 Vi 16% is% 10% 8% 17% 4% 2775 13900 100 6 30 % 17 J?% 13 9% 21 S>/z 5550 27800 200 12 60 2 21% 2|l/2 13 11 24 8525 41700 300 24 90 3 21 Vz ' 21% 13 11 25 Boiler output. Above burners available without built-in pumps in same sizes and capacities. F p 15>/2 19% 20 20% 929