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Summary of Contents for nvent RAYCHEM BTV
- Page 1 INSTALLATION AND MAINTENANCE MANUAL SELF-REGULATING AND POWER LIMITING HEATING CABLE SYSTEMS...
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Page 3: Table Of Contents
Thermostats Pg. 22 Thermal insulation and marking Pg. 23 Power supply and electrical protection Pg. 25 Heating cable testing Pg. 25 Operation, maintenance and pipe Pg. 27 repairs Heating cable damage Pg. 28 Troubleshooting guide Pg. 28 nVent.com | 3... -
Page 4: General Information
VPL Power Limiting Heating Cables Important For the nVent warranty to apply, the instructions that are included in this manual and product packages must be followed. The installation must be compatible with local requirements applicable to electric heat- tracing systems. - Page 5 II 2 GD Ex e IIC 226°C (T2) Gb PTB 09 ATEX 1117 X II 2 GD Ex tD A21 IP66 T226°C Baseefa06ATEX0188X II 2GD Ex e II T* Ex tD A21 IP66 T**°C *see schedule in hazardous area approval. nVent.com | 5...
- Page 6 15 mm 0°C ≤ T < +10°C 20 mm 20 mm 20 mm 15 mm 15 mm T ≥ +10°C 12 mm 12 mm 12 mm 12 mm 12 mm Minimum Installation –60°C –60°C –60°C –60°C –60°C Temperature nVent.com | 6...
- Page 7 Do not connect heating cable conductors together or this will result in a short circuit. Any unconnected heating cable end must be sealed with a nVent approved end seal. To prevent fire or explosion in hazardous areas, verify that the maximum sheath temperature of the heating cable is below the auto-ignition temperature of the gases in the area.
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Page 8: Heating Cable Selection
HEATING CABLE SELECTION Check the design specification to make sure the proper heating cable is installed on each pipe or vessel. Refer to nVent product literature and the TraceCalc software to select the proper heating cable for each thermal, chemical, electrical and mechanical environment. - Page 9 3.4 Heating cable attachment recommendations • The heating cable may be installed straight, spiralled or in multiple runs as required by the design specification, nVent product literature or TraceCalc software. – Do not use metal attachments, vinyl electrical tape or duct tape as heating cable damage may result.
- Page 10 Ensure that the active heating zones are located where heat is required i.e. on the pipe. • Thermally insulate and weatherproof to specification. nVent.com | 10...
- Page 11 Thermal (nominal) Glass cloth tape insulation (typical) (typical) Tight on pipe nVent attachment tapes: GT66 Self-adhesive glass cloth tape General purpose tape. Not for stainless-steel surfaces or for installation temperatures <4°C. GS54 Self-adhesive glass cloth tape Recommended for use on stainless-steel and cupra- nickel surfaces or for installation temperatures <4°C.
- Page 12 350 mm. Figure 2a Pipe length Glass cloth tape Pipe (typical) Pitch Heating cable Apply glass Tape after cloth tape Wrap loops in spiralling cable before spiralling opposite on pipe cable on pipe direction Heating cable length nVent.com | 12...
- Page 13 General notes: • Trace pipe fittings as shown to allow easy maintenance. • Consult the design specification or nVent product literature or TraceCalc software for the tracing requirements for fittings and supports. • Follow the recommendations for cutting and stripping heating cables;...
- Page 14 (including valve stem). 3.6.2 Elbow Figure 4 Pipe Glass cloth tape (typical) Heating cable Thermal insulation • Fix heating cable to outside (long) radius of elbow • Fix with self-adhesive glass cloth tape • Thermally insulate and weatherproof to specification nVent.com | 14...
- Page 15 • Fix with self-adhesive glass cloth pipe • Thermally insulate and weatherproof to specification 3.6.4 Pipe bar hanger Figure 6 Bar hanger Sealer Weatherproofing Thermal insulation Pipe Heating cable Bar hanger Sealer Glass cloth tape Heating cable (typical) nVent.com | 15...
- Page 16 Glass cloth tape Support shoe Pipe (typical) View from under Heating cable Pipe • Refer to design specification for additional heating cable length • Fix with self-adhesive glass cloth tape • Thermally insulate and weatherproof to specification nVent.com | 16...
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Page 17: Components Installation
COMPONENTS INSTALLATION General notes: Select the required components from nVent product literature or use the TraceCalc software. RAYCHEM component kits (including power connections, splices and end seals) must be used to satisfy Standards and Approval Body requirements. Installation instructions included in the kit must be followed, including those for preparation of the heating cable conductors for connections. - Page 18 4.2 Typical systems Figure 8a Valve SB-100 JBU-100 Heating cable End seal nVent.com | 18...
- Page 19 Wallmounted IEK-25-04 Insulation entry kit JBU-100 Junction box for modular system C25-100 Connection kit Heating cable Splice (as required) Thermal insulation Glass cloth tape (typical) Insulation Entry kit SB-101 Thermostat nVent.com | 19...
- Page 20 Figure 8b JBM-100 Integrated power/ tee con nec tion T-100 Tee or splice con nec tion JBS-100 Integrated power con nec tion (shown with light) C-150 Low profile power connection IEK-25-04 Insulation entry kit nVent.com | 20...
- Page 21 E-100-L Lighted end seal E-100 End seal S-150 Low profile splice E-150 Low profile end seal nVent.com | 21...
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Page 22: Thermostats
THERMOSTATS • In temperature-sensitive applications, thermostatic control may be necessary. If maximum temperature is a concern, consult your nVent representative for design assistance. • Follow the installation instructions supplied with the thermostat. Use the proper wiring diagram for the heating cable layout and control method desired. -
Page 23: Thermal Insulation And Marking
• Check that all insulation entry kits are fitted correctly and sealed. • Ensure that all places where valve stems, support brackets, thermostat capillaries, etc exit the cladding are sealed. nVent.com | 23... - Page 24 Mark on outside of insulation the location of heating cable components. • For XTV and KTV heating cables if T-class compliance was proven by stabilized design: install LAB-EX-XTV-KTV aluminium tag at approximately 75 mm from the entry of the junction box. Figure 10c nVent.com | 24...
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Page 25: Power Supply And Electrical Protection
7.3 Residual current (earth fault) protection nVent insists on the use of a 30 mA residual current device to provide maximum safety and protection. However, where there is a marked increase in nuisance tripping, a maximum 300 mA residual current device may be used. - Page 26 Figure 11 Test between heating cable and braid nVent.com | 26...
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Page 27: Operation, Maintenance And Pipe Repairs
OPERATION, MAINTENANCE AND PIPE REPAIRS 9.1 Heating cable operation – Temperature exposure must not exceed that specified in nVent product literature. Exceeding those limitations will shorten the service life and may permanently damage the heating cable. • Pipe insulation must be complete and dry to maintain the correct temperature. -
Page 28: Heating Cable Damage
Remove from service at once and replace before re-use. 11 TROUBLESHOOTING GUIDE • Refer to the Troubleshooting guide on pages 32-34. If the problem persists after following the guide procedures, contact your nVent representative immediately. nVent.com | 28... - Page 29 | 29...
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- Page 32 Excessive moisture in: a junction boxes b splices and tees c end seals High leakage currents due to a combination of excessive lengths of power cable and heating cable. Mains borne disturbances Defective RCD nVent.com | 32...
- Page 33 Energize part of circuit followed by remainder (e.g. in sequence Replace Corrective Actions Investigate and remedy (see note 1): Dry out and reseal or remake immediately. Perform insulation resistance test. (10 MΩ minimum) Redesign Redesign distribution, guidance is available from nVent Replace nVent.com | 33...
- Page 34 C Symptom: No power output. Probable Causes Loss of supply voltage due to: a overcurrent or residual current protection operating b loose terminals in junction box c loss of supply cable continuity (e.g., open circuited from damage Control thermostat is connected in the normally open position High resistance connection at: a junction box terminals...
- Page 35 Replace 4 If after 1, 2 and 3 above the fault has not been located, then either: a) Consult nVent for futher assistance. b) Where local practices and conditions allow (e.g., non hazardous areas) isolate one section of heating cable from another by cutting in half and testing (e.g., Insulation Resistance) both halves until...
- Page 36 Fax 0800 0224993 salesnl@nvent.com nVent.com ©2018 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without notice.
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