Installation Instructions Industrial Heating Cable Products PJ438-20 161-057884-001 July, 2013 Important General Instructions These instructions are to be followed when installing Chromalox Heating cables on pipes in ordinary locations. Consult factory for installation of braided cable in hazardous locations. Chromalox ELECTRIC SHOCK HAZARD. Any cable with an insula- has four basic types of heating cables: Self-Regulating, Constant tion resistance reading less than 10 megohms before Wattage, Mineral Insulated and Series Long Line Cable. Although installation should not be installed. Contact your local they are all resistance type cables, they each have different oper- Chromalox representative. ating characteristics. These characteristics may make one type of cable more suitable for a particular application than another. This 4. The heating cables should be stored in their shipping cartons manual, however, is not intended as a product selection manual. or on reels in a dry atmosphere until they are ready to be in- Refer to Chromalox Design Guide for Heat Tracing Products” for stalled. product selection guidelines. Below is a chart highlighting certain 5. Handle coils and reels utilizing equipment designed for that characteristics for Chromalox heating cables. purpose. 6. Do not drop coils or reels, especially from transporting equip- 1. Open package and visually check for breaks or nicks in the ment. cable jacket. File claim with carrier if any damage is found. 7. Lift or handle reels so that the lifting/handling device does 2. Never energize the cable when it’s coiled or on a reel. Test only not come in contact with the cable or it’s protective covering. when it is laid out straight. Coils should be placed on a skid. 8. Handle reels so that the deterioration or physical damage of 3. After removing the cable from the carton or wrapping, check cable is prevented. the resistance of the unit from buss wires to braid or metal sheath with a 500 VDC (1,000 VDC recommended) megger to assure the cables have not been damaged during shipping and handling. If the cable has no braid or metal sheath, uncoil the cable onto a metal surface and check resistance between the buss wires and the metal surface. See table on page 9 for acceptable minimum insulation resistance readings. NOTICE KEEP DRY These products may be become damaged by moisture. Damage to electrical components, electrical properties, corrosion or other damage may occur if equipment is not stored in a dry location. Visual inspection and electrical checks must be performed prior to installation to ensure safety and proper operation. See equipment installation manual or contact the factory for more information. 800-443-2640 or www.chromalox.com. 2 Chromalox Cable Types Constant Mineral Series Self-Regulating Wattage Insulated Long Line Hazardous ratings available Yes Yes Yes Yes Useable on plastic pipe Yes* No No No Can be cut to length in field Yes Yes No Yes Can be single overlapped Yes No No No Resistance Wire Overcoat Over Braid (Optional) Binder Module Point Buss Wires Buss Wires Tinned Copper Braid (Optional) Primary Insulation Jacket Conductive Matrix Tinned Copper Braid (Optional) Overcoat Over Braid (Optional) Self-Regulating Constant Wattage High Temperature Alloy 825 Sheath Fluoropolymer Overjacket Densely Compacted 16, 14, 12,10 AWG Mineral Insulation Copper Buss Wires Metallic Braid High Temperature Fluoropolymer Jacket High Temperature Twin (Shown) or Single Fluoropolymer Core Matrix Resistance Wires SLL Long Line Mineral Insulated 3 Installation A. IMPORTANT — GENERAL NOTES REGARDING 15. Pumps and small vessels should be heat traced and controlled with the piping on the inflow end. The cable on the pump or INSTALLATION OF HEAT TRACING SYSTEMS. vessel should be physically separate to permit disconnection during maintenance or removal. 16. Use aluminum foil tape to cover the heating cable whenever FIRE HAZARD. Failure to follow these guidelines could the cable is not in good contact with the pipe (i.e. at supports, result in property damage or personal injury. valves, pumps, etc.) or whenever its use is specified by the 1. Read this instruction sheet and those enclosed with the ac- “Chromalox Design Guide for Heat Tracing Products”. cessories to familiarize yourself with the products. 17. Separately controlled circuits should be provided on dead end 2. Selection of heating cable type and rating should be in accor- legs and closed bypasses. dance with the procedures located in the “Chromalox Design 18. No heat tracing circuit should extend more than two feet be- Guide for Heat Tracing Products”. yond a point where two or more pipes join when such junc- 3. Ensure all pipes, tanks etc. have been hydrostatically tested tions permit optional flow paths. In such cases, separately prior to the installation of the heating cable. controlled traces should be used. 4. Always install tracing at the 5 or 7 o’clock position on a pipe. 19. The minimum installation temperature for all Chromalox heat- 5. Installation Guidelines for fire protection systems: ing cables is -40˚F (-40˚C). a. For use on insulated UL listed steel schedules 5, 10, 20 20. Chromalox Type SRL heating cables are well suited for heat and 40 standpipe and sprinkler system pipe up to and in- tracing plastic pipes. Consult “Chromalox Design Guide for cluding 6 in. size. Includes use on elbows, tees, flanges, Heat Tracing Products” for design recommendations. Installa- hangers and valves as shown. (show figures of heating tion details AD1 through AD17 apply for plastic pipe only when cable installed to various equipment as mentioned above). Type SRL heating cable is used. Consult factory for applica- UL listed fiberglass insulation with a minimum k-factor of tions involving other products. 2 0.25 BTU/hr -˚F/ft -in with weatherproof cladding must be used. B. INSTALLING A SINGLE RUN OF CABLE ON A PIPE. b. For systems having piping which connects between build- 1. Mount the reel of cable on a holder and place near one end of ings in unheated areas, coolers and freezers. the pipe run to be traced. Choose the end from which it will be c. For systems having sprinkler piping that is installed in cool- the easiest to pay out the cable. ers or freezers where the temperature is -40˚F or greater. 2. Pay out the cable from the reel and loosely string along the Not intended to be used as the means to prevent freezing of piping, making sure the cable is always next to the pipe when sprinkler branch lines including all accessories for these lines crossing obstacles. For example, if the heater is on the wrong and automatic (deluge, preaction, dry pipe, alarm, etc.) valves side of a crossing pipe, you will have to restring the cable or as referenced in NFPA 13. cut and splice it. For use in Ordinary Hazard Occupancies only as specified in NFPA 13 the standard for the installation of sprinkler systems. Fire suppression system heater circuits must be connected To prevent damage to cable, avoid such things as: to monitoring equipment. A listed power supply relay with the — Pulling the cable over sharp edges. appropriate voltage coil shall be connected in parallel prior — Forcibly pulling the cable free if it snags while to the heat tracing (should show figure with typical installa- being paid out. tion). The output contacts of the listed power supervisory relay — Allowing the cable to be walked on or subjec- should be connected to a listed fire control panel which has ed to other abuse which could cause mechan- provisions for supervisory circuits. ical damage. 6. Do not attempt to heat trace any piece of equipment 3. When you reach the end of the circuit, secure the heater cable which will not be insulated. to the pipe using glass tape or plastic cable tie with a tem- 7. Do not install heating cable on equipment which perature rating compatible with the heater cable. could become hotter than the heating cable’s maxi- If this end is to have an end seal installed, remember to leave mum exposure temperature. about a foot of extra cable. If it is a power connection, leave 8. Do not install heating cable in an area or on equip- about two feet of extra heater cable. ment which contains potentially corrosive materials 4. (If the heater cable is to be spiralled, go to step 4A.) without having a suitable protective jacket on the Begin attaching the cable to the pipe about every foot (.3 me- cable. ters). 9. The minimum bending radius for all Chromalox Place the cable on the bottom half of the pipe at the 5 or 7 heating cables is six times the minor diameter. o’clock position. Refer to installation detail AD1. Go to step 5. 10. Allow a minimum of 2” between cable runs. a. Note the path of the heater cable and the spiral factor of 11. Always install heat tracing on the outside radius of the design. A simple way to think about spiral factor is: elbows. A1.1 spiral factor means install 11 feet of heating cable on 12. Never install heat tracing over expansion joints every 10 feet of pipe, etc. At about every 10 feet of pipe, without leaving slack in the cable. pull the required amount of cable and let hang in a loop, and attach the cable to the pipe. 13. Never use tie-wire or pipe straps to secure Self- Regulating Maximum Circuit length or Constant b. Rotate the loops around the pipe until all the slack has Wattage heating cables. been taken up. Even out the spirals of the heater cable and secure to the pipe as necessary to obtain good contact. 14. Observe all published specifications. Do not expose The entire circuit can be installed with hanging loops with cables to temperatures above their specified maxi- the spiralling on the pipe being done when you trace the mums. Do not run cables longer than specified max- heat sinks. Refer to installation detail AD3. imum circuit lengths. See table 3 for details. 4 5. At a heat sink (pipe supports, valves, pumps, reducers, gaug- i. At each heat sink, the easiest thing to do is supply the es, bucket strainers, etc.), attach the heater cable to the pipe extra heater called for by the design drawing from only just before the heat sink. Refer to the design specs to deter- one heater cable. This avoids having to measure out half mine the amount of heater cable you need to install on the of the requirement from each cable. heat sink. Pull this amount of cable into a loop, attach the ii. When doing the previous step, leave a small loop oth- heater cable on the other side of the heat sink and continue er cable at equipment which may be serviced, such as attaching the cable down the pipe as before. pumps, valves, instruments, etc. This is so both heater 6. When you reach the heater cable reel, you should have the cables may be removed enough for future access. heater cable attached all along the pipe, with the correct b. Supply heater cables from one reel. amount of heater cable pulled in loops at all heat sinks. Attach The general procedure is the same as given earlier, but the cable to the pipe, (leave an extra foot if at an end seal, two there are a few things to do to make sure the system is feet if at a power connection) and cut the heater cable from correctly done. the reel. i. With this method, a loop is pulled for the entire circuit. 7. Install the heater cable loops on the heat sinks. Refer to the To do this, attach the end of the heater cable to the pipe proper installation detail (AD5-AD12) for a general idea of how near the heater cable reel. Remember to leave enough to install the cable, but remember: extra cable for the type of connection to be installed. • It is important to get the proper amount of heater cable on ii. Begin pulling the cable off the reel in a large loop down the heat sink, rather than exactly as the detail shows. The the piping run. Be sure to keep the cable next to the detail is just a guide. pipe. Moving down the run, continue attaching the ca- • Self-Regulating heater cables are very flexible and can be ble to the pipe, leaving the side of the loop going back single overlapped for installation ease. Feel free to use this to the reel unattached. feature when you can. iii. You will want both sides of the loop to be about the same length to avoid future problems. Also, it is easier to install the extra cable required at each heat sink from FIRE HAZARD. Do not overlap constant wattage or min- only one cable. Therefore, pull the right amount of extra eral insulated heating cables. heater cable needed at every second heat sink from the side of the loop you are attaching to the pipe. At the • By having the cable installed this way, it can be removed remaining serviceable heat sinks (pumps, valves, instru- easily from the heat sink without cutting if access to, or ments, etc.) don’t forget to leave a short loop of cable removal of the heat sink is required. for slack when access to the equipment is needed. Note: If a tee is designed into the system, or if you are using two iv. When the end of the piping run is reached, pull the or more short cable lengths to complete a circuit, allow two or proper amount of extra cable for the connection to be three feet of each cable to overlap. This will allow flexibility in as- installed. sembling the connection kit and locating it on the pipe. v. Now, begin working the remaining side of the loop back C. INSTALLING MORE THAN ONE HEATING CABLE ON A toward the reel, installing it on the pipe and heat sinks PIPE. as required. There are two cases where you will need to install more than one 2. Installation for Backup (Redundant) Systems. heater cable on a pipe: The purpose of a backup system is to provide the proper • When the design calls for more than one cable. amount of heat from the second heater cable if there are prob- • When the lines being heat traced are considered important lems with the first. Therefore, each cable must be installed so enough to install a backup (redundant) heat tracing system. it can do the job alone. The simplest way to do this is to install The installation requirements are different for these cases. the first heater cable as given in Section B. Then, go back and install the backup heater cable the same way. 1. Installing multiple heater cables for design requirements. There are several things to keep in mind: The most common multiple cable requirement is two cables on a pipe. Below are the recommended techniques for the two • The power connections and end seals for the two cables cable systems. They also apply to installations where three or are often designed to be at opposite ends of the run in a more cables are to be installed on a pipe. redundant system. Remember to leave the proper amount of extra cable for the connection to be installed on each There are two ways of paying out two heater cables along a cable at that end. pipe. The first is to locate two reels of heater cable and supply one cable from each. This method works for all types of piping • On piping one inch IPS or smaller, it can be difficult to ap- runs. ply both heater cables with good contact at all places. The main thing is to get the correct amount of cable installed. However, it may increase material waste by leaving unusable However, try to get as much contact with the piping and lengths from two reels. The second way is to supply both ca- heat sinks from both cables as possible. bles from one reel. This method is generally the easiest for relatively straight, simple piping runs. For each circuit, decide which method to use and then go to the appropriate part be- low. a. Supplying cable from two reels. The general procedure here is the same as given earlier, but there are a few things to do to make sure the system is correctly done. 5 Typical Installation Detail AD1 - One Run of Cable AD1 - Two Runs of Cable AD3 - One Cable-Spiralling Method AD4 - One Run of Cable at Pipe Elbow AD5 - Orifice Flange AD6 - Expansion Joint 6 AD7 - Welded Support AD8 - Shoe Support AD9 - Valve AD10 - Pressure Gauge AD11 - Diaphragm Pressure Gauge AD12 - Level Gauge 7 AD13 - U Series Power Connection AD14 - U Series Splice & Tee Connection AD14 - EL Series Splice and Tee Kit AD15 - End Seal AD16 - DL Series Power Connection AD17 - DL Series Splice & Tee Connection 8 AD18 - Sensor Placement Wiring 7. All equipment must be properly grounded. 8. Install installation accessories according to the instructions ELECTRIC SHOCK HAZARD. Disconnect all power be- included in the kits and per installation details AD13 through fore installing or servicing heating cable. Failure to do AD17. so could result in personal injury or property damage. Heater must be installed by a qualified person in accor- dance with the National Electrical Code, NFPA 70. To prevent equipment damage, Circuits fed from over- head lines should be protected by secondary lighting arrestors. ELECTRIC SHOCK HAZARD. Any installation involving CONTROLS: electric heating cables must be performed by a qualified 1. All heating circuits should have temperature controls. Temper- person and must be effectively grounded in accordance ature control of the pipeline can be obtained through various with the National Electrical Code to eliminate shock Chromalox temperature controls. hazard. 2. Contactors must be used when load currents exceed the rat- ACCESSORIES: ing of the thermostat contacts. Equipment protection ground 1. Selection of installation accessories should be in accordance fault (30 mA EPD) thermal breakers are recommended with with ChromaTrace 3.0 design software program. Ensure ac- type SRL, SRM/E, SRP & SLL. cessories are rated for the area where they are located. If 3. The temperature control should be mounted in a location Chromalox accessories are not used with cable, all third party where it will not be subjected to excessive shock or vibration. approvals are voided. 4. Line sensing temperature sensors should be mounted in ac- 2. Only use Chromalox installation kits and use them only for the cordance with Installation Detail AD18 (see Detail above). operations for which they are designed. 5. Ambient sensing temperature sensors should be located at a 3. The instructions included in the Chromalox installation acces- point where the lowest ambient temperature is expected. sories must be followed in order for the third party approvals (UL, FM, CSA, ATEX, IECEx, etc.) to apply. 4. Junction boxes must be in accordance with the requirements To prevent equipment damage, handle and secure tem- of the area classification. perature sensors, especially thermostat bulbs and cap- 5. All outdoor junction boxes must be located above grade level. illaries with care to avoid distortion or crimping which Covers should be kept on the boxes at all time when not being might impair control accuracy. worked in. 6. Exposed thermostat capillaries should have mechanical pro- 6. All terminations must be protected from the weather and from tection. physical damage by locating them either under the weather- proof insulation or inside an appropriate junction box. 9 End Cap End Cap Heat Resistance Wire L2 Heat Generating Matrix L2 Power Supply Power Supply L1 Buss Wire L1 Thermostat Buss Wire Thermostat Contactor Contactor Heat Resistance Wire Heat Generating Matrix L2 Power L2 Power Supply L1 Supply L1 Buss Wire End Cap Buss Wire End Cap Control Control Circuit Circuit Thermostat Thermostat I. Self-Regulating II. Constant Wattage Contactor End Cap Heat Resistance Wire Heat Resistance Wire L2 L2 Power Supply Power Supply L1 L1 Cold Lead End Cap Thermostat Control Circuit OR L2 L1 Thermostat Thermostat III. Mineral Insulated Installation Testing When the heater cable and connections for a circuit have been Delivery Installed Maintenance completed, immediately perform the following checks. Chromalox SR 20 mΩ 5 mΩ 5 mΩ 1. Visually inspect the heater cable and temperature controls for Chromalox MI 20 mΩ 5 mΩ 5 mΩ signs of mechanical damage. If damage is seen, either replace the complete heater cable, or cut out the damaged section Chromalox Snow Melt 20 mΩ 5 mΩ 5 mΩ and replace using the proper splice connection for the area and cable you are using. 4. Check voltage at end of circuit and record in log. 2. Inspect all connections to be sure they are correctly assem- bled. Be sure each heater cable entry to a connection has a grommet and the compression plates and caps are properly tightened. 3. Inspect the insulation resistance of the circuit using a 500 VDC (1,000 VDC recommended) megger. Always perform this test at the power connection. See the following table for minimum insulation resistance readings. Any cable with an insulation re- sistance below the recommended value should be removed and factory should be contacted. 10 Thermal Installation An installed heating circuit should be thermally insulated im- 7. Insulation must be covered by a weatherproof barrier, such as mediately to provide protection from damage from ongoing an aluminum jacket. work. Things to remember about insulating: 8. If you are using metal jacketing and sheet metal screws, be 1. Insulate the equipment being heat traced as soon as possible sure the screws are not long enough to penetrate the thermal after the heating cable is installed. This will protect the cable insulation and damage the heater cable. from possible physical damage. 9. Again, perform the megger test on the circuit immediately af- 2. The type and thickness of thermal insulation specified on ter the thermal insulation is installed to detect if any mechani- the design drawing must be used. If you use another type or cal damage may have occurred. thickness, the heater cable type or amount may have to be 10. When the insulation and the weatherproofing is complete, at- changed. tach “Electric Traced” labels on the outside of the insulation. 3. Never install wet insulation. Both the piping and the insulation These should be installed where they are visible from normal must be dry when thermally insulating a circuit. Wet insulation operations, usually on alternating sides about every 10 feet. It may cause start-up or operational problems. is also useful to mark the location of any connections buried under the insulation. 4. Properly weatherproof the thermal insulation. All places where valve stems, conduits, pipe supports, connection housing, Additional requirements for rigid thermal insulations: thermal capillary tubes, etc. extend outside the insulation 1. In the standard single heater cable installation, rigid insula- jacketing must be sealed with a suitable compound to keep tions do not need to be oversized. However, they should be water out. carved so there is no gap in the insulation. 5. Insulate valves fully up to, and including, the packing gland. 2. In case of redundant or multiple heater cables, rigid insula- 6. Heat trace and fully insulate the face of all non-diaphragm tions which are .500 inches oversized should be used. pressure instruments. Commission Testing 1. Again, visually inspect the piping, insulation and connections For systems controlled by line-sensing thermostats: for the heater cable to make sure no physical damage has oc- 1. Set the thermostat to the desired control temperature. curred if some time period has elapsed since the installation 2. Turn the main circuit breaker ON. and start-up. 3. Turn ON the branch circuit breakers controlled by the thermo- 2. Megger the system again to determine if damage not readily stat. visible has occurred. 4. Allow the pipe temperatures to be raised to the control point. 3. Turn all branch circuit breakers to the OFF position. This may take up to four hours for most circuits (large full pipes may take longer). For systems controlled by ambient-sensing thermostats: 5. Measure the amperage draw. ambient temperature, and pipe 1. If the actual ambient temperature is higher than the desired temperature for each circuit and record in the installation log. thermostat setting, turn the thermostat setting up high enough This information may be needed for future maintenance and to turn the system ON or (some models) turn the selector troubleshooting. switch to the ON position. 2. Turn the main circuit breaker ON. For redundant systems: 3. Turn the branch breakers ON one-by-one until all are on. Follow the procedure above for the type of control system you 4. Allow system to run at least four hours in order to let all pipes have, but commission the systems one at a time. Start up the pri- reach steady-state. mary system, qualify it and shut it down. Then start up the backup system, qualify it and shut it down. 5. Measure the amperage draw, ambient temperature and pipe temperature for each circuit and record in the installation log. This information may be needed for future maintenance and troubleshooting. 6. When the system is completely checked out, reset the ther- mostat to the proper temperature. Specifications Table 1 – Maximum Temperatures Max. Maintain Max. Exposure Cable Type (Power On) (Power Off) SRL / HSRL 150˚F 185˚F SRM/E / HSRM 302˚F 420˚F CWM See table below See table below SRF 150˚F 185˚F SRP 230˚F 275˚F SLL 302˚F 450˚F 11 Table 2 – Maximum Maintenance Temperatures Temperatures (˚F) Output (W/Ft.) 3 4 6 6.7 8 9 10.1 10.6 12 w/o AT-1 Tape 340 325 293 282 262 246 229 222 200 w AT-1 Tape 350 344 332 328 320 314 307 304 296 Table 3 – Maximum SRL / HSRL Circuit Breaker Selection (Max. Circuit Lenghts in Ft.) 50°F Start-Up (Ft.) 0°F Start-Up (Ft.) -20°F Start-Up (Ft.) Cable Rating 10A 15A 20A 25A 30A 40A 10A 15A 20A 25A 30A 40A 10A 15A 20A 25A 30A 40A SRL / HSRL3-1C 205 305 360 NR NR NR 135 200 270 330 360 NR 120 185 245 300 360 NR SRL / HSRL3-2C 400 600 660 NR NR NR 275 415 555 660 NR NR 245 370 495 600 660 NR SRL / HSRL5-1C 125 185 250 270 NR NR 90 135 180 225 270 NR 80 120 160 205 245 270 SRL / HSRL5-2C 250 375 505 540 NR NR 180 270 360 450 540 NR 160 245 325 405 490 540 SRL / HSRL8-1C 100 150 200 215 NR NR 70 110 145 180 215 NR 65 100 130 165 200 210 SRL / HSRL8-2C 185 285 375 420 NR NR 135 200 265 335 395 420 120 175 235 300 350 420 SRL / HSRL10-1C 60 95 130 160 180 NR 50 80 105 130 155 180 45 70 95 120 140 180 SRL / HSRL10-2C 100 160 210 260 315 360 80 125 170 210 255 340 75 120 160 195 240 320 SRM/E / HSRM Circuit Breaker Selection (Max. Circuit Lenghts in Ft.) 50°F Start-Up (Ft.) 0°F Start-Up (Ft.) -20°F Start-Up (Ft.) Cable Rating 15A 20A 30A 40A 50A 15A 20A 30A 40A 50A 15A 20A 30A 40A 50A SRM/E / HSRM 3-1 285 385 NR NR NR 275 375 385 NR NR 265 365 385 NR NR SRM/E / HSRM 3-2 575 770 780 NR NR 540 750 780 NR NR 525 740 780 NR NR SRM/E / HSRM 5-1 180 240 360 375 NR 165 220 330 375 NR 155 210 310 375 NR SRM/E / HSRM 5-2 360 480 720 750 NR 325 430 645 750 NR 310 415 620 750 NR SRM/E / HSRM 8-1 145 190 285 325 NR 135 175 265 325 NR 130 165 250 325 NR SRM/E / HSRM 8-2 285 380 575 650 NR 255 345 520 650 NR 245 335 490 650 NR SRM/E / HSRM 10-1 95 125 190 250 NR 90 110 175 250 NR 85 100 170 245 250 SRM/E / HSRM 10-2 190 255 385 490 NR 165 225 345 490 NR 155 215 330 470 490 SRM/E / HSRM 15-1 70 95 145 190 210 65 85 125 165 210 60 80 120 150 210 SRM/E / HSRM 15-2 145 190 290 385 420 120 175 270 360 420 115 165 260 340 420 SRM/E / HSRM 20-1 60 75 115 155 160 50 65 105 140 160 45 65 100 135 160 SRM/E / HSRM 20-2 115 155 230 305 350 100 135 200 270 350 90 130 195 255 335 SRP Circuit Breaker Selection (Max. Circuit Lenghts in Ft.) 50°F Start-Up (Ft.) 0°F Start-Up (Ft.) -20°F Start-Up (Ft.) Cable Rating 15A 20A 30A 40A 50A 15A 20A 30A 40A 50A 15A 20A 30A 40A 50A SRP 5/1 145 195 295 390 490 110 145 215 295 360 70 90 135 180 225 SRP 10/1 100 135 200 270 330 70 95 145 190 240 65 85 130 175 215 SRP 15/1 75 100 150 200 250 60 80 120 160 200 55 70 110 145 180 SRP 5/2 295 385 580 750 750 220 290 430 580 720 135 180 270 360 450 SRP 10/2 200 270 400 530 665 145 190 290 380 480 130 175 260 350 440 SRP 15/2 150 195 295 390 500 120 160 235 320 400 110 145 220 290 360 12 CWM Specifications SRF Circuit Breaker Selection (Max. Circuit Lengths in Ft.) Circuit Load Max Circuit 40°F Start-Up (Ft.) 0°F Start-Up (Ft.) Model (Amps / Ft.) Length (Ft.) Cable CWM 4-1CT 0.033 350 Rating 20A 30A 40A 20A 30A 40A SRF 3-1C 350 360 NR 270 360 NR CWM 8-1CT 0.067 240 SRF 3-2C 660 NR NR 555 660 NR CWM 12-1CT 0.100 200 SRF 5-1C 230 270 NR 180 270 NR CWM 4-2CT 0.017 700 CWM 8-2CT 0.033 480 SRF 5-2C 450 540 NR 360 540 NR SRF 8-1C 180 215 NR 145 215 NR CWM 12-2CT 0.050 400 SRF 8-2C 330 420 420 265 395 420 CWM 12-4CT 0.025 780 16.00 Nominal Output Ratings on Metal Pipe - 120 VAC Nominal Output Ratings on Metal Pipe - 240 VAC 14.00 W/Ft. W/Ft. 12.00 12.00 10.00 10.00 SLL45 SLL45 SLL28 8.00 8.00 SLL18 SLL28 SLL10 SLL18 SLL10 6.00 6.00 4.00 4.00 2.00 2.00 0.00 0.00 1400 0 200 400 600 800 1000 1200 1600 0 500 1000 1500 2000 2500 3000 3500 4000 Cable Length (ft.) Cable Length (ft.) 16.00 16.00 Nominal Output Ratings on Metal Pipe - 480 VAC Nominal Output Ratings on Metal Pipe - 600 VAC 14.00 14.00 W/Ft. W/Ft. 12.00 12.00 SLL45 10.00 10.00 SLL45 SLL28 SLL28 8.00 8.00 SLL18 SLL18 SLL10 6.00 SLL10 6.00 4.00 4.00 2.00 2.00 0.00 0 1000 2000 3000 4000 5000 6000 7000 8000 0.00 0 1000 2000 3000 7000 4000 5000 6000 Cable Length (ft.) Cable Length (ft.) NR = Not Required. Maximum circuit length has been reached in a smaller breaker size. Note — Thermal magnetic circuit breakers are recommended since magnetic circuit breakers could “nuisance trip” at low temperature. Maintenance Recommended maintenance for Chromalox heat tracing systems Repair or replace all damaged heater cable, connections, thermal consists of performing the steps involved in the commission test- insulation and weatherproofing using only Chromalox connec- ing on a regular basis. For those systems controlled by line sens- tions and methods before testing the system. ing thermostats, Chromalox recommends checking the system at Record all repairs made and measurements taken in the installa- least twice per year. Systems controlled by an ambient-sensing tion and maintenance log. thermostat should be checked when the season requiring their use is approaching. 13 Installation and Maintenance Log Reference Information Circuit Number Circuit Breaker Number Drawing Number Circuit Length Heat Tracing Visual Checks Inital No Signs of Moisture, Corrosion or Damage Date Inital Proper Electrical Connection Date Inital Proper Grounding of the Braid Date Heat Tracing Electrical Checks Meg Ohms Megger Test (500 VDC) (Bypass Controls) Date Amperage Amperage Draw Test Amb. Temp Compare to design Amperage Draw Date Voltage Voltage at end of Circuit* Date Accessories/Control Checks Setpoint Temperature Control Properly Set Date Inital Sensors Protected and Undamaged Date Inital All Enclosures and Kits Closed and Sealed Date Thermal Insulation Checks Inital Location of Kits Visible on Outside of Insulation Date Inital Insulation is Complete, Dry and Weatherproof Date * This test must be performed at installation or at any time the cable is cut or damaged in any way. Limited Warranty: Please refer to the Chromalox limited warranty applicable to this product at http://www.chromalox.com/customer-service/policies/termsofsale.aspx. 1347 HEIL QUAKER BLVD., LAVERGNE, TN 37086 Phone: (615) 793-3900 www.chromalox.com 14 © 2013 Chromalox, Inc.