Danfoss PX Pipe Trace Heating System Installation guide
Installation Instruction
Danfoss PX Pipe Trace Heating System
Installation Instruction Danfoss PX Pipe Trace Heating System
Table of contents
1 |
Overview |
3 |
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2 |
Safety |
3 |
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3 |
Certifications / Approvals |
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4 |
4 |
Technical data |
4 |
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5 |
Personnel requirements |
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4 |
6 |
System design |
5 |
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7 |
Power connection components |
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5 |
8 |
End-termination |
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5 |
9 |
Accessories |
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6 |
10 |
Trace heater installation |
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7 |
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Preparation |
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7 |
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Maximum heating circuit length . . . . . . . . . . . . . . . . |
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. 7 |
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Required tools / equipment |
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8 |
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Unrolling the trace heater |
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8 |
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Installation on pipes . . . . . . . . . . . . . . . . . . . . . . |
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. 8 |
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Fastening . . . . . . . . . . . . . . . . . . . . . . . . . . |
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10 |
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Installation on functional elements |
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11 |
11 |
Tests and putting into operation |
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13 |
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Measurement of the insulation resistance |
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13 |
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Acceptance test and acceptance test report . . . . . . . . . . . . |
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14 |
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Putting into operation . . . . . . . . . . . . . . . . . . . . . |
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. 14 |
12 |
Operation |
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14 |
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System documentation . . . . . . . . . . . . . . . . . . . . |
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14 |
13 |
Maintenance |
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15 |
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Visual and functional inspection |
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15 |
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Electrical inspection . . . . . . . . . . . . . . . . . . . . . . |
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15 |
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Inspection intervals |
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15 |
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Personnel training courses . . . . . . . . . . . . . . . . . . . |
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. 15 |
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Repairwork on piping or thermal insulation . . . . . . . . . . . . |
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15 |
14 |
Troubleshooting |
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16 |
15 |
Acceptance report |
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17 |
16 |
Limited product warranty |
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18 |
17 |
Safety |
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20 |
18 |
Sécurité et avertissements |
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21 |
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Installation Instruction |
Danfoss PX Pipe Trace Heating System |
1 Overview
This manual introduces the installation and operation of trace heating circuits using the following self-regulating trace heaters:
• Danfoss PX Pipe Trace Heating System
The self-regulating trace heater features a temperature-dependent resistive element between two parallel copper conductors, that regulates and limits the heat output of the trace heater according to the ambient temperature. If the ambient temperature rises, the power output of the trace heater is reduced. This self-regulating property prevents overheating which would cause damage to the trace heater.
Even crossing or overlapping with other trace heaters (or other portions of the same trace heater) are possible.
The heating system is set up as a fixed equipment heating system for pipes in ordinary areas. Thanks to the parallel design the trace heater can be cut and installed to any required length as specified in table on page 7.
Multiple options for connection, splicing and end-termination of the heating circuit are available to meet the individual requirements on site. A large variety of accessories allows for easy customization and extensibility.
2 Safety
For safe installation and operation of the Danfoss PX Pipe Trace Heating System, all technical requirements and instructions given in this manual must be followed.
WARNING:
Risk of fire or electrical shock. Follow these guidelines to avoid personal injury or material damage.
•All electrical systems and installations must comply with Danfoss requirements and be installed in accordance with the relevant electrical codes and any other applicable national and local codes.
•The US and Canadian electrical codes require ground fault protection to be provided for all trace heating circuits.
•Install the trace heater circuit carefully.
•Use the trace heater in accordance with the intended purpose and strictly comply with the operational data specified in section Technical Data.
•The bending radius of the trace heater must be at least 1” (25 mm). Do not bend on the narrow axis.
•To avoid short circuits, do not connect the trace heater bus wires together.
•Keep all components and the trace heaters dry before and during installation
•Each heating circuit must be marked with electrical warning labels (see section Accessories).
•Keep these instructions for future reference. If applicable, leave them with the end user.
•De-energize before installation or servicing.
•Use only original Danfoss accessories.
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3 Certifications / Approvals
Self-regulating trace heater Danfoss PX.
4 Technical data
Ambient temperature range |
-67 °F to +185 |
°F / -55 °C to +85 °C |
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Operation temperatures |
-40 °F to +149 |
°F /-40 °C to +65 °C |
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Voltage |
110 to 120 VAC / 208 to 254 VAC |
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Heat output |
3 to 10 W/ft / 10 to 33.6 W/m |
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Resistance |
Grounding braid: < 18.2 Ω/km |
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Dimensions |
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polyolefin outer jacket |
0.46” x 0.23” (11.6 x 5.8 mm) |
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Minimum bending radius |
1” (25 mm) |
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Do not bend in an upright position. |
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5 Personnel requirements
The personnel executing installation and maintenance tasks must have acquired the skills and specialized knowledge relating to the types of protection and types of devices concerned. At least, the personnel must have:
•a general understanding of the relevant electrical engineering
•a basic knowledge of quality assurance, including the principles of auditing documentation, traceability of measurements and calibration of measurement instruments.
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Installation Instruction |
Danfoss PX Pipe Trace Heating System |
6 System design
A heating circuit with self-regulating trace heaters usually consists of:
•Power supply cable connection;
•End-termination.
The following pages list all compatible components for the PX heating system. The respective installation instructions are included in the scope of delivery.
7 Power connection components
The following components can be used for power connection with the PX Pipe Trace Heating System:
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Power connection kit |
Catalog No.: |
088L0023 |
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Cable to Junction Box with |
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½” NPT cable gland |
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For connection of self- |
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regulating trace heaters in |
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a junction box. Electrical |
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insulation is ensured by heat |
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shrink tubes. |
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Junction is not included. |
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Includes end-temination. |
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8 End-termination
The following components can be used for end-termination with the PX Pipe Trace Heating System.
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End-termination |
Catalog No.: |
088L0767 |
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Connecto NA B-E Silicone end |
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seal for insulation of the end |
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of the trace heater. |
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Includes 5 x endcap and 2 x |
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Silicone adhesive. |
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End-termination |
Catalog No.: |
088L1457 |
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Heat shrinkable end cap for |
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insulation of the end of the |
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trace heater. |
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Includes 5 kits. |
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Danfoss PX Pipe Trace Heating System |
9 Accessories
The following original Danfoss accessories are available for the PX Pipe Trace Heating System.
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Aluminium adhesive tape |
Catalog No.: |
088L0409 |
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application under trace |
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heaters for better heat |
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distribution. |
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Electrical warning label |
Catalog No.: |
088L0412 |
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Warning label for trace heater |
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circuits |
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Installation Instruction |
Danfoss PX Pipe Trace Heating System |
10 Trace heater installation
Preparation
Before installing any electric trace heating, the person installing must check if the trace heating has been designed and planned correctly. It is particularly essential to verify the following points:
•complete project planning documentation, operating instructions and installation instructions.
•correct selection of the trace heater and accessories with respect to:
·calculation of heat losses;
·max. permissible operating temperature;
·max. permissible ambient temperature;
·temperature class;
·heating circuit length.
Before installing, make sure that all piping and equipment is properly installed and pressure tested.
Maximum heating circuit length
The following table shows the maximum circuit lengths in m (ft) for the different trace heater types with standard circuit breaker amperages. Breaker sizing should be based on the National Electrical Code, Canadian Electrical Code or any other local or applicable code.
NOTICE: If the required trace heater length exceeds the maximum heating circuit length you must install multiple heating circuits.
Power output |
Start-up |
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Maximum heating circuit length in ft. (m) |
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Trace |
temp. |
Operating Voltage: 120 Vac |
Operating Voltage: 208 Vac |
Operating Voltage: 240 Vac |
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heater type |
°F (°C) |
20 A |
30 A |
40 A |
20 A |
30 A |
40 A |
20 A |
30 A |
40 A |
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+50 (+10) |
312 (95) |
312 (95) |
312 (95) |
591 (180) |
591 (180) |
591 (180) |
673 (205) |
673 (205) |
673 (205) |
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PX-F3 (3 W/ft) |
0 (-18) |
295 (90) |
312 (95) |
312 (95) |
551 (168) |
591 (180) |
591 (180) |
597 (182) |
640 (195) |
640 (195) |
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-20 (-29) |
246 (75) |
312 (95) |
312 (95) |
476 (145) |
591 (180) |
591 (180) |
505 (154) |
623 (190) |
640 (195) |
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-40 (-40) |
240 (73) |
312 (95) |
312 (95) |
420 (128) |
558 (170) |
591 (180) |
479 (146) |
623 (190) |
640 (195) |
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+50 (+10) |
262 (80) |
262 (80) |
262 (80) |
486 (148) |
492 (150) |
492 (150) |
525 (160) |
525 (160) |
525 (160) |
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PX-F5 (5 W/ft) |
0 (-18) |
197 (60) |
262 (80) |
262 (80) |
394 (120) |
492 (150) |
492 (150) |
394 (120) |
525 (160) |
525 (160) |
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-20 (-29) |
161 (49) |
262 (80) |
262 (80) |
328 (100) |
443 (135) |
476 (145) |
328 (100) |
525 (160) |
525 (160) |
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-40 (-40) |
157 (48) |
256 (78) |
262 (80) |
312 (95) |
394 (120) |
476 (145) |
315 (96) |
512 (156) |
525 (160) |
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+50 (+10) |
190 (58) |
207 (63) |
207 (63) |
344 (105) |
377 (115) |
377 (115) |
381 (116) |
413 (126) |
413 (126) |
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PX-F8 (8 W/ft) |
0 (-18) |
125 (38) |
184 (56) |
207 (63) |
246 (75) |
312 (95) |
344 (105) |
246 (75) |
374 (114) |
413 (126) |
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-20 (-29) |
105 (32) |
177 (54) |
207 (63) |
203 (62) |
289 (88) |
322 (98) |
210 (64) |
348 (106) |
404 (123) |
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-40 (-40) |
98 (30) |
164 (50) |
207 (63) |
190 (58) |
272 (83) |
302 (92) |
197 (60) |
328 (100) |
387 (118) |
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+50 (+10) |
148 (45) |
167 (51) |
180 (55) |
262 (80) |
312 (95) |
312 (95) |
295 (90) |
335 (102) |
361 (110) |
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PX-F10 (10 W/ft) |
0 (-18) |
98 (30) |
138 (42) |
148 (45) |
190 (58) |
256 (78) |
295 (90) |
197 (60) |
276 (84) |
295 (90) |
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-20 (-29) |
85 (26) |
125 (38) |
131 (40) |
164 (50) |
230 (70) |
269 (82) |
171 (52) |
236 (72) |
262 (80) |
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-40 (-40) |
72 (22) |
115 (35) |
118 (36) |
131 (40) |
180 (55) |
230 (70) |
131 (40) |
197 (60) |
230 (70) |
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NOTICE: Automatic circuit breaker has to be “C” tripping characteristic.
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Installation Instruction Danfoss PX Pipe Trace Heating System
Required tools / equipment
The following tools are required for installation of the PX Pipe Trace Heating System: |
1 |
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•Wire cutters
•2 adjustable wrenches (up to 1” (25 mm)); for installation of an insulation bushing only)
Unrolling the trace heater
WARNING:
Risk of short cuts and/or material damage. Keep the trace heater ends dry before and during installation. Observe the trace heater’s installation instructions.
Unroll the required trace heater in a straight line and cut to the correct length. Cut off the trace |
2 |
heater ensuring a straight cut. |
Do not bend or pinch the trace heater, or pull it over sharp edges.
Installation on pipes
This step is necessary for plastic pipes only since plastic pipes conduct heat less efficiently than |
3 |
metal pipes do. For metal pipes continue with step 4. |
Place aluminium tape where the trace heater will be attached for better heat distribution.
8 | © Danfoss | 2019.11 |
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