A-102-1 Electric Duct Heater Brochure - Brasch

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IndexBottom Insert . . . . . . . . . . . . . . . . . . . . 11Raintight Construction . . . . . . . . . . . . . . 11Bottom Outlet . . . . . . . . . . . . . . . . . . . . 12Recessed Terminal Box. . . . . . . . . . . . . . 10Construction Details . . . . . . . . . . . . . . . 6, 7Round-Duct Construction . . . . . . . . . . . . 14Dusttight Heaters. . . . . . . . . . . . . . . . . . 10SCRs . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Express Duct Heaters . . . . . . . . . . . . . . . 27SCR-Vernier . . . . . . . . . . . . . . . . . . . . . . 8Finned Tubular Construction . . . . . . . . . . 15Single Zone. . . . . . . . . . . . . . . . . . . . . . 16Flanged Construction . . . . . . . . . . . . . . . . 5Sizes and KW Ratings . . . . . . . . . . . . . . . 3Installation . . . . . . . . . . . . . . . . . . . . . . . 5Slip-in Construction . . . . . . . . . . . . . . . . . 5Insulated Terminal Box . . . . . . . . . . . . . . 12Specification, Sample. . . . . . . . . . . . . . . . 4Multizone . . . . . . . . . . . . . . . . . . . . . . . 16Step Controllers. . . . . . . . . . . . . . . . . . . . 8NEC Requirements . . . . . . . . . . . . . . 24-26Technical Data. . . . . . . . . . . . . . . . . . . . 16Oven Heaters . . . . . . . . . . . . . . . . . . . . 13Thermostats . . . . . . . . . . . . . . . . . . . . . . 9Pressure Drop Graph . . . . . . . . . . . . . . . 18Wiring Diagrams-Control Systems. . . . 20-23Protective Screens . . . . . . . . . . . . . . . . . 13UL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Quality Control. . . . . . . . . . . . . . . . . . . . . 32 BRASCH MANUFACTURING
Ratingsand SizesYou specify it—we build it! Heatersdescribed in this bulletin are customdesigned at no extra charge to yourexact size, wattage, voltage andphase and number of steps. Any ductsize from W = 5" and H = 4" minimumto W = 480" and H = 180"maximum, wattages to 2000 KW canbe furnished. Base price dependsupon duct size and KW rating; baseprice is the same for single or threephase and does not change withnumber of steps.For practical design of heater, minimumrecommended KW per step is .5KW for 208V single phase; 1.0 KW for277V or 480V single phase and 2.0KW for 480V or 600V three phase.UL ListingUL Listed by Underwriters Laboratories, Inc. under File Nos. E 39836 and E39386for zero clearance between heater and combustible surfaces. Listing includes allbuilt-in components unless otherwise noted. Heaters are also UL Listed for usewith heat pumps and air conditioners when mounted 4 feet or more from unit andmaximum inlet air temperature is 100°F.Quality ControlHeaters are dielectrically tested for 1000V plus twice the rated voltage or 2000V,whichever is higher. The resistance of each heater is measured and recorded andmust be within 5% of rated value. Electrical components are tested and inspectedafter installation in the heater. Every heater is checked twice; once in productionand once by a trained Quality Control inspector who gives each heater a thoroughinspection.Suggested Schedule for Electric Heating CoilsHorizontalInsideorDuct Type VerticalTag Size CFM No. of Control of AirflowNO. W' x H' (Min.) KW Voltage/Phase Steps Volts Control Direction Special FeaturesEH-1 to 10 12 x 8 430 5.0 480/3 2 24 PE Direct ActingEH-11 18 x 12 750 21.5 480/3 1 24 SCR HAF Direct Acting TransducerAH-1 — 5000 85.0 480/3 6 24 Step Control Preheat for Carrier 39BA120-BBULLETIN A102-13
Page 1: Bulletin A102-1© Brasch Manufactur
Page 6 and 7: Construction DetailsAutomatic reset
Page 8 and 9: Step ControllersStep controllers ar
Page 10 and 11: Special ConstructionsHeaters forDuc
Page 12 and 13: Special Constructions (cont.)BOTTOM
Page 15 and 16: Finned TubularSLIP-IN AND FLANGED
Page 17 and 18: Use these formulae as rough guideli
Page 19 and 20: How to Calculate Line CurrentsTo de
Page 21 and 22: Wiring Diagram Control System 2Mult
Page 23 and 24: Wiring Diagram Control System 4Tota
Page 25 and 26: REQUIREMENT(b) Thermostats That Do
Page 27 and 28: Express Duct Heaters 14 Day Shipmen

A-102-1 Electric Duct Heater Brochure - Brasch

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