Cold Weather Catalog - Chromalox Precision Heat and Control
Cold Weather Catalog - Chromalox Precision Heat and Control
Cold Weather Catalog - Chromalox Precision Heat and Control
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<strong>Heat</strong>ing CableDLIntegrated Temperature<strong>Control</strong>s (cont’d.)RTBC & RTBC-EP Bulb & CapillaryRTBC is a line-sensing thermostat whichis generally used for process temperaturemaintenance applications in ordinary (nonhazardous)areas. The thermostat is mountedwithin the enclosure <strong>and</strong> the capillary isbrought out through one of the openings inthe bottom of the box. This design providesextra protection for the capillary, especiallywhen the control is mounted on a pipe, forheat tracing applications. The three foot longstainless steel capillary provides good fl exibilityin mounting locations.FG6.25"(15.9 cm)A5.25"(13.3 cm)EBC4.25"(10.8 cm)DConstructionABCDEFStrategically placed cable entries allowmaximum fl exibility for insulation(<strong>Heat</strong>ing cable cut away for clarity).Stainless steel tiedown support providespositive attachment to pipes. 1Heavy duty support legs give stable pipemounting <strong>and</strong> provide conduit clearancefor applications with up to three inchesof insulation.Opening for 3/4" (20 mm) conduit hub. 1Oblique sided box <strong>and</strong> cover allow easyaccess for wiring.Stainless steel capillary (3 ft/1m long).ACCESSORIES& CONTROLSRTBC-EP is a modifi ed version of the RTBCwhich utilizes a hermetically sealed switch.Since this switch has no arcing contacts itcan be used in Division 2 Hazardous Areas.SpecificationsTemp. Setpoint Range — 0 to 400°F (-18 to200°C) for RTBC, RTBC-EPKMLNIGHStainless steel sensing bulb.Cable grommets provide water-tight sealbetween base, box, cable <strong>and</strong> capillary.Use GRSR with all self-regulating cables.Use GRCW with constant wattage cables.One of each grommet included in kit. Seetable below for spare grommets.Microswitch ® Rating — 22 Amps SPDT forRTBC; 11 Amps, RTBC-EPMinor Scale Division — 10°F (5.6°C)Max. Sensor Exposure Temp. — 450°F(230°C)Sensor Dimensions — 1/4" (6.4mm) OD x7-1/4" (18.4cm) L Bulb, 3' (1m) CapillaryOperating Ambient Temp. Range — -40°F to160°F (-40 to 71°C)Factory Preset <strong>and</strong> Calibrated — 200°F(93°C) for RTBC, RTBC-EPOHIJKLMNThree position terminal block for easywiring.Power wiring entry. Conduit hub notincluded. 1Gasket provides water-tight seal betweenbox <strong>and</strong> lid. It is affi xed to the lid <strong>and</strong>captures the mounting hardware.Thermostat mounting bracket.Setpoint adjustment knob.Thermostat switch.OStainless steel sensing bulb.Note 1 — Refer to DL & EL General ApplicationAccessories at the end of this section.Spare GrommetsPCNGRS RTD/Capillary type 385000GR0 Blank 385019GRSR Self-regulating cable type 389714GRCW Constant wattage cable type 389722Ordering Information — RTBCModelPCNSwitch Rating Max. Continuous Exposure Temp. Max. Max. Intermittent Exposure Temp. Temp.(Amps/Volts)°F °C °F °CWt.(Lbs.)RTBC 389600 22A @ 120 - 480 400 200 500 260 2RTBC-EP 389618 11A @ 120 - 250 400 200 500 260 2Stock Status: S = stock AS = assembly stock NS = non-stockTo Order—Specify model, PCN <strong>and</strong> quantity.145