Document 5kLVmKNJn5aaQ23Z2RaXxEqQN

Air Conditioning ,Unit Heaters end Coolers D. J. Murray Manufacturing Go. Wausau, Wisconsin Offices In Principal Cities MANUFACTURERS OF THE GRID UNIT AND GRID BLAST COILS Designed and tested to operate with steam or hot water systems--for steam pressures from 2 lbs to 250 lbs. Engineered along the same lines as the standard GRID Unit which had aluminum heating sections and has been on the market since 1929. One piece construction "fin" heating sections of high test cast iron--no soldered, brazed, welded or expanded connections. Patented. Overall dimensions for installation of Cast Iron GRID Unit Heater Cl (CAST IRON) SERIES GRID UNIT HEATER DATA Model No. A Dimensions B CD Motor Camelries VoL Fan 5 Psi Steam 60 F Approx. Shipp. Pipe Size Support Rod E Hp Rpm Cm Btu/ Hr Final Air TMPF Lbs. Supply Return Di&m. Cl-1000 ny. I0>/2 l2'/4 \m 16 1/20 1750 675 30010 101 160 114 i'/. CI-I2Q0 I4X I3H 12% 13% I9X 1/8 1750 IM2 54000 103 230 i% 1'/ CM500 17Vz I5H 12 16 23% 1/8 1750 1500 76500 107 300 i% i'/. CI-2000 22% 2m 12 21% 28% 1/6 1150 2600 143000 110 v 500 2 I'A CI-2504 2T'h 25% 13 25K 35% 1/4 1150 3300 206000 117 675 2* 1% Cl-2500 mi 25JS 13 25Jf 351/. 1/2 1150 4350 224000 107 700 2* i'/. CI-3000 32% 31 13 31 1/2 850' 6300 332000 108 1025 2'/i* i'/. Cl-3000 32% 31 13 31 40% 1/2 1150 8000 380000 103 1075 2'/i" iy. Vi Vi Vi Vi H H H K Furnished also with 2 in. top supply connection inlet. NO ELECTROLYSIS TO CAUSE CORROSION Low maintenance expense. More air changes per hour. Positive "directed " heat. No leaks--no breakdowns. . Lower outlet temperature. Larger air volume. No soldered, brazed or expanded joints. . , Open design that keeps units clean.- Send for complete catalog information Send for information on Blast coils and radiation. 990 4 Air Conditioning Industrial Heating Direct Fired Units National Heater Co. 401 Essex Bldg., Minneapolis 2, Minn. Nationai championL STEEL S-P-A-C-E HEATERS OIL--GAS-STOKER HAND FIRED UNITS As shown in diagram these heaters are built as a complete unit consisting of heater, casing, firing equipment, multi ple blower assembly, motor, drive* induced draft blower and controls. NATIONAL HEATERS ^are con structed of welded copper bearing hot rolled one quarter inch boiler plate steel instead of the usual lighter ten guage plate. This provides positive assurance of life-long gas and smoke tight operation with ample provision for absorbing all strains resulting from expansion and contraction. The body of the heat generator is long and narrow in design, allowing complete fuel consumption with prop erly spaced radiating fins to facilitate maximum heat transmission from this primary heating surface. Casings are sturdy with insulated double metal walls to reduce wasteful radiation to a minimum. Panel type construction with rigid angle iron frames and structural iron reinforcement at both top and bottom assures a strong durable installation. Casings are designed for quick and con venient assembly. ENGINEERING RATING CHART HEATER NUMBER B.T.U. OUTPUT CAPACITY 2SPC.F.M. MAX. 300 350 *00 550 600 650 700 750 640,000 660.000 1.215.000 2,000,000 2,500,000 3.000,000 3.500,000 4,000,000 6.200 11.000 16,150 32,000 45,000 52.000 56.000 60,000 CRATE AREA SQ.FT. SQ.FT. HEATING SURFACE VOLUME CU. FT. INSIDE HEATER BLOWER MAXIMUM 6.5 8.0 12.0 14.7 16.0 20.0 24.0 26.00 320 430 600 644 1421 1685 1610 1935 75 100 130' 175 - 315 375 450 4SO 16-TWtM I6TW1N 2ITWIN ZrTRIPLE' 27TRIPLE 30"TRIPLE 30-TRIPLE 30**TRIPLE BLOWER MOTOR HP. MAX. RPM. APPROXIMATE TUBES WEIGHT NO. OIA. LESS STOKER 3 1750 2 6" " 6*50 5 1750 ? 6" 14.4 20 . 7* 1750 10 4" 15.660 - 10 1750 12 4* 16.610 15 1750 16 4" 20,650 20 1750 16 4" 24,090 25 1750 18 4" 26.340 30 1750 20 4" 26,470 991