Document K6qy2mzxnepjOazELOVk5wd4w

Thermal Units Manufacturing Co. 228 N. LaSalle Street, Chicago, 111. 30 Church Street, New York, N. Y. The Thermal Unit System of Space Heating The line includes unit heaters, blast coils and concealed radiators for a wide range of uses. Integral Heating Section The outstanding feature of the Thermal Unit is the one-piece aluminum-alloy cast ing which includes the steam channel and extended heating surfaces from inlet to outlet as an integral unit. There are no tance that the heated air is projected. The large size of the core and the high velocity of the air induce rapid steam condensation and rapid release of heat units. Conductivity of heat is rapid with minimum penetration or conduction losses. The louvers are designed on the airplane principle, assuring unusual efficiency in directing the air currents. They are hinged separately to secure various angles o( deflection. Motor is standard type, enclosed and generously rated, quiet and durable. Fan is four-blade aluminum construction, rivetedtoaxle hub and built for longservice. The assembly is enclosed in a trim, sheet metal cabinet as illustrated. It may be suspended from steam line or installed on wall or ceiling. Brief operating data and dimensions are given below. Thermal Unit Coolers joints, welds, flanges or soldered connec tions to open up as the metal expands or contracts. This construction withstands water-hammer and other destructive forces. Even freezing in service cannot damage it. 'All Thermal .Unit castings are tested to 450 ;lb. hydrostatic pressure before ship ment. Stream-line Core Airplane-wing design of the steam core cuts down resistance'to the passage of air through the channels between the fins, while the smooth surfaces, rounded edges and parallel spacing add yards to the dis- Capacities for use on Direct Ammonia Expansion, Brine, SO, and Menthyl Chloride. Capacities Mth to 10 tons. "Automatically Defrosted" . The prime cooling surface of Unit Coolers is limited, therefore quick de frosting is necessary. The Thermal Unit Defrosting equip ment controls the suction line--when ice forms on the cooling surface the restriction ' of the air-flow opens a switch operating the suction line cut-off valve. The fan is con stant. The back pressure created defrosts the unit immediately. "Equipped with Rust-Proof Moisture Eliminators, Cabinets and Fittings'* Description Model 12 Model 16 Model 20 Model 24 Model 30 Air velocity.......... ft. min. Air velocity........... Motor.................. Net weight .......... ....... lb. Shipping weight. .. .......lb. 1000 1000 1/10 95 116 2000 1165 1/6 146 170 3000 1200 1/6 189 225 4500 1200 1/4 255 310 6500 1200 1/2 346 457 A very comprehensive engineering data book will be sent upon request. Thermal Unit ` `Air-Wringers' ' Extract the moisture from the air. For process work-- evaporating and dehumidifying. Designed to supply air of any relative humidity de sired. 694 Heaters, Unit 'jBERMmaijgj 24-4-1-AS CHARLOTTE STREET KANSAS CITY;MO. An E. K. Campbell Product "T Thermidaire Units are made with capacities ranging in size from 138 sq. ft. equivalent direct' radiation to 3350 sq. ft., rated at. 60 degrees enteringtemperatureand 5 poundssteam pressure. All units use the Thermidaire high-pressure heating elements, which have been tested to more than 600 pounds hydrostatic pressure, and are guaranteed for 150 pounds steam working pressure. These elements are built entirely of cold-rolled copper, fused by a special process which makes the element an integral piece. This construction solves all expansion problems and is leak-proof. These units are backed by a service that makes friends. Lo-Vel The following ratings are at 60 degrees entering temperature and 5 pounds steam pressure: LO-VEL TYPE Unit No. 4 5 8 10 14 15 20 24 25 30 50 RPM. 1750 1150 850 1150 1150 850 1150 1150 850 1150 1150 C.F.M. 400 500 800 1000 1450 1500 2000 2450 2500 3000 5000 B.T.U. 33,100 43,500 72,000 84,000 117,800 134,800 168,000 181,800 210,000 224,000 372,000 E.D.R. 138 174 288 336 491 540 672 756 840 896 1550 HI-VEL TYPE 112 1750 3000 113 1750 4500 114 1750 6000 122 1150 8000 123 1150 12000 Complete data furnished on request. 240,000 360,000 480,000 600,000 804,000 1000 1500 2000 2500 3350 695