A-102-1 Electric Duct Heater Brochure - Brasch
A-102-1 Electric Duct Heater Brochure - Brasch A-102-1 Electric Duct Heater Brochure - Brasch
Construction DetailsAutomatic reset thermal cutout (primarysafety protection) standard on everyheater. Automatically resets after heaterhas cooled. Wired in series with elementson single phase heaters notexceeding the ratings. For all otherheaters cutout controls contactors.Manual reset thermal cutout(optional) secondary safety protection.External reset button isnormally located in terminalbox cover.NOTE:Central location of thermal cutout allows sameheater to be used for left- or right-hand and verticalup airflow.Main supply terminals for connectionto copper supply wires(standard).Ground lugBuilt-in transformer providescontrol voltage ifnot same as line voltage.(Optional)Properly sizedknockoutsControl terminalsReset button for manualreset thermal cutout.(Optional)Built-in fuses.(Optional)Built-in magnetic contactor.(Optional)Heavy gauge corrosion protected terminalbox (galvanized steel standard)Terminal box cover is solid, nonperforated type,assuring dust-free, trouble-free operation ofbuilt-in contactors. Screws are accessible fromfront. Hinged cover provided when fuses, PEswitches, or interlocking disconnect switch arebuilt-in. (Cover shown separate here for clarity)Figure 1Typical Slip-in Heater (Featuresalso apply to flanged heaters)6 BRASCH MANUFACTURING
Open coil iron-free heating elements. Highest grade (80%nickel, 20% chromium) Type A resistance wire has longer life;coils do not sag or oxidize; resistance does not change withtime; glowing is minimized with sufficient airflow. Elementsare spread across the face of the heater, when practical, toavoid stratification.Optional finned tubular heating elements.80/20 nickel/chromium innercoil centered in copper-plated steeltubes; magnesium oxide filler assuresrapid heat transfer from coil to steelfins brazed to tube; silicone rubberdouble seals prevent magnesium oxidecontamination. High temperature aluminumcoating protects element surfacesfrom corrosion.Secondary disc-type cutouts standard on every heater. Set athigher temperature than automatic reset thermal cutout. MeetsUL and NEC requirements. Sufficient number of cutouts locatedin the power lines de-energize elements should automatic resetthermal cutout fail; easily serviced through the terminal box. Noback-up contactors are required.Support brackets with special reinforcements(ribbing along edges and gussetsin top and bottom mounting flanges)BULLETIN A102-1Coil terminations have been designedto assure trouble-free connections.Ceramic bushings and stainless steelterminals guard against high temperatures.Coil connection is machinecrimped and nuts are tightened tospecified torque.7
- Page 1 and 2: Bulletin A102-1© Brasch Manufactur
- Page 3: Ratingsand SizesYou specify it—we
- 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
Construction DetailsAutomatic reset thermal cutout (primarysafety protection) standard on everyheater. Automatically resets after heaterhas cooled. Wired in series with elementson single phase heaters notexceeding the ratings. For all otherheaters cutout controls contactors.Manual reset thermal cutout(optional) secondary safety protection.External reset button isnormally located in terminalbox cover.NOTE:Central location of thermal cutout allows sameheater to be used for left- or right-hand and verticalup airflow.Main supply terminals for connectionto copper supply wires(standard).Ground lugBuilt-in transformer providescontrol voltage ifnot same as line voltage.(Optional)Properly sizedknockoutsControl terminalsReset button for manualreset thermal cutout.(Optional)Built-in fuses.(Optional)Built-in magnetic contactor.(Optional)Heavy gauge corrosion protected terminalbox (galvanized steel standard)Terminal box cover is solid, nonperforated type,assuring dust-free, trouble-free operation ofbuilt-in contactors. Screws are accessible fromfront. Hinged cover provided when fuses, PEswitches, or interlocking disconnect switch arebuilt-in. (Cover shown separate here for clarity)Figure 1Typical Slip-in <strong>Heater</strong> (Featuresalso apply to flanged heaters)6 BRASCH MANUFACTURING
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