http://www.chromalox.com PDS DL CONTROLS alox Chrom Chro malo x x alo om Chr Chr om alox Single Point On/Off Temperature Controls alox Chrom Ch rom alo x x malo Chro Ambient Sensing • • • • 120 - 480 Vac 0 - 225˚F Temp. Rating 9/16” OD x 4” SS Probe Ordinary & Hazardous (Div. 2) Areas Bulb & Capillary • 120 - 480 Vac • 0 - 400˚F Set Point Range • 1/4” OD x 7-1/4” SS Bulb, SS Capillary • Ordinary & Hazardous (Div. 2) Areas Description Features The DL Series Single Point On/Off Temperature Controls from Chromalox represents the state of the art in heat tracing accessories and are available in five models to handle a broad range of applications. Models include two ambient sensing thermostats and two line sensing thermostats. These high-quality models combine a variety of functions in a convenient, easy to use and economical package. • Integrated controls and power connections reduce installation hardware • Molded of durable plastic material (Ryton® PPS) • High service temperature • Corrosion resistant • Thermal stability • Non-flammability • High strength and rigidity • Stainless Steel sensor sheaths • Sealed Switches on EP models permit control in Div. 2 hazardous areas • Stainless steel hardware to ensure the integrity of the system • Cable terminations inside enclosure reduce installation time and cost • Liquid-resistant design prevents moisture from reaching the electrical connections. All models are rated NEMA 4X. • UL, FM, CSA is carried by most models, consult specific product information. Applications • Freeze Protection • Hydrocarbon and Chemical Product Piping • Process Temperature Maintenance • Fluid Flow and Viscosity Maintenance Approvals* UL Listed for use in ordinary areas CSA Certified for use in ordinary and Class I, Div. 2, Groups A, B, C, D Class II, Div. 2, Groups F, G Ryton¤ is a registered trade name of Phillips Chemical Company. FM - Factory Mutual Certified for use in ordinary and Class I, Div. 2, Groups B, C, D Class II, Div. 2, Groups F, G Class III, Div. 2 areas * Depends on specific model PRECISION HEAT AND CONTROL PH: 888-996-9258 • FX: 615-793-3563 www.chromalox.com © 2003 Chromalox, Inc. http://www.chromalox.com DL — Single Point On/Off Temperature Controls Available Models RTAS & RTAS-EP Ambient Sensing Model RTAS is an ambient-sensing thermostat which is generally used for freeze protection in ordinary (nonhazardous) areas. The thermostat is mounted through the end of the oblique sided enclosure lid. In fact, because there is so much room in this model, multiple heating cables can be terminated. The stainless steel sheathed, inverted bellows probe provides good sensitivity, resulting in more accurate control. Model RTAS-EP is a modified version of the Model RTAS which utilizes a sealed switch. Since this switch has no arcing contacts it can be used in Division 2 Hazardous Areas. RTBC & RTBC-EP Bulb & Capillary Model RTBC is a line-sensing thermostat which is generally used for process temperature maintenance applications in ordinary (non-hazardous) areas. The thermostat is mounted within the enclosure and the capillary is brought out through one of the openings in the bottom of the box. This design provides extra protection for the capillary, especially when the control is mounted on a pipe, for heat tracing applications. The three foot long stainless steel capillary provides good flexibility in mounting locations. Model RTBC-EP is a modified version of the RTBC which utilizes a sealed switch. Since this switch has no arcing contacts it can be used in Division 2 Hazardous Areas. Exterior Construction F 5.25" (13.3 cm) 4.25" (10.8 cm) 5.25" (13.3 cm) 4.25" (10.8 cm) 3" (7.6 cm) E D D F E 6.25" (15.9 cm) C A B G 6.25" (15.9 cm) A B C A Strategically placed cable entries allow maximum flexibility for insulation (Heating cable cut away for clarity) A Strategically placed cable entries allow maximum flexibility for insulation (Heating cable cut away for clarity) B Stainless steel tiedown support provides positive attachment to pipes B Stainless steel tiedown support provides positive attachment to pipes C Heavy duty support legs give stable mounting and provide conduit clearance for applications with up to three inches of insulation C Heavy duty support legs give stable mounting and provide conduit clearance for applications with up to three inches of insulation D Opening for 3/4-inch (20 mm) conduit hub D Opening for 3/4-inch (20 mm) conduit hub E Stainless steel sheath temperature sensor E Oblique sided box and cover allow easy access for wiring F Oblique sided box and cover allow easy access for wiring F Stainless steel capillary (3 feet/1 meter long) G Stainless steel sensing bulb 2 Chromalox ® • 1382 Heil Quaker Blvd. • LaVergne, TN 37086 • PH: 888-996-9258 • FX: 615-793-3563 • www.chromalox.com http://www.chromalox.com DL - Single Point On/Off Temperature Controls Interior Construction Each model consists of a NEMA 4X corrosion resistant wiring and control enclosure with terminal block, enclosure support, on/off thermostatic control and sensor. The enclosure has a 3/4” opening to accept a conduit hub (CCH-2 or equivalent). A pipe strap (PS Series pipe straps or equivalent) is required to mount the enclosure on a pipe. A mounting plate (MP Series) is required to mount the enclosure to a flat surface. RTAS A G C F B C D E B A E F G D Cable grommet provides water resistant seal between base and box Three position terminal block for easy wiring Power wiring entry. Conduit hub not included Gasket provides water resistant seal between box and lid. It is affixed to the lid and captures the mounting hardware Thermostat switch Set point adjustment knob Set point indicator RTAS-EP A G C B C D F E B H A E F G F H D Cable grommet provides water resistant seal between base and box Three position terminal block for easy wiring Power wiring entry. Conduit hub not included Gasket provides water resistant seal between box and lid. It is affixed to the lid and captures the mounting hardware Hermetically sealed thermostat switch Set point adjustment knob Set point indicator Ground wire connector RTBC A D F G E B B C D A E F G H H Cable grommet provides water resistant seal between base and box Three position terminal block for easy wiring Power wiring entry. Conduit hub not included (Not shown in picture) Gasket provides water resistant seal between box and lid. It is affixed to the lid and captures the mounting hardware Thermostat mounting bracket Set point adjustment knob Thermostat switch Stainless steel sensing bulb RTBC-EP A G C F D B E B C D A H I E F G H I Cable grommet provides water resistant seal between base and box Three position terminal block for easy wiring Power wiring entry. Conduit hub not included (Not shown in picture) Gasket provides water resistant seal between box and lid. It is affixed to the lid and captures the mounting hardware Thermostat mounting bracket Set point adjustment knob Hermetically sealed thermostat switch Stainless steel sensing bulb Ground wire connection *UL, FM, CSA not available Chromalox ® • 1382 Heil Quaker Blvd. • LaVergne, TN 37086 • PH: 888-996-9258 • FX: 615-793-3563 • www.chromalox.com 3 http://www.chromalox.com Single Point On/Off Temperature Controls — DL Enclosure Specifications for RTAS & RTBC Max. Continuous Max. Intermittent Exposure Temperature Exposure Temperature Switch Rating PCN (Volts/Amps) °F °C °F °C Wt. (Lbs.) RTBC 389600 22A @ 120 - 480 400 200 500 260 2 RTBC-EP 389618 11A @ 120 - 250 400 200 500 260 2 RTAS 389589 22A @ 120 - 480 400 200 500 260 2 RTAS-EP 389579 11A @ 120 - 250 400 200 500 260 2 Model Number Cable grommets provide a water-tight seal between base, box and cable. Use GRSR with all self-regulating cables. Use GRCW with all constant wattage cables. One of each grommet is included in each kit. See table below to order spare grommets. Spare Grommets Model Description PCN GRS RTD/Capillary 385000 GRO Blank 385019 GRSR Self-Regulating Type 389714 GRCW Constant Wattage Type 389722 Thermostat Specifications for All RTAS & RTBC Temperature Set Point Range ....................... 0 to 400°F (-18 to 200°C) for RTBC Only; 0 to 225°F (-18 to 107°C) for RTAS Microswitch® Rating ........................................ 22 Amps SPDT for RTAS and RTBC; 11 Amps at 250V for EP models Scale Division ...................................................... 10°F (5.6°C) Maximum Sensor Exposure Temp. ............. 450°F (230°C) Sensor Dimensions ........................................... 1/4” OD x 7-1/4” L Bulb, 3’ Capillary - RTBC 9/16” OD x 4” L Stainless Steel Probe - RTAS Operating Ambient Temp. Range ................ -40 to 160°F (-40 to 71°C) Factory Preset and Calibrated ...................... 200°F (93°C) for RTBC 40°F for RTAS PJ327 PDS DL CONTROLS OCT 03 4 ® Chromalox • 1382 Heil Quaker Blvd. • LaVergne, TN 37086 • PH: 888-996-9258 • FX: 615-793-3563 • www.chromalox.com
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