internal pipe tracing - nventthermal.com a section of pipe where liquid will not flow. do not leave...

1 / 8 IndustrIal Heat tracIng sOlutIOns Raychem-IM-H59920-InternalPipeTracing-EN-1611

DESCRIPTIONRaychem in-pipe heat trace cable is suitable for internal tracing of insulated metal and plastic pipes. This unique solution heats the pipe from the inside and is an ideal solution for existing buried pipes, making it unnecessary to excavate a pipe that is already buried.

The heating cable is supplied with a gland connector that makes a liquid-tight seal into a “Tee” or “Y” (Wye) pipe fitting.

For technical support contact your local Pentair representative or Pentair Industrial Heat Tracing Solutions at (800) 545-6258.

This heating cable is an electrical device that must be installed correctly to ensure proper operation and to prevent shock or fire. Read these important warnings carefully and follow all installation instructions.

WARNING:

APPROvAlS

Internal PIPe tracIngINSTALLATION INSTRUCTIONS FOR METAL AND PLASTIC PIPES

C US

Usage/Type: PS, X / D

TOOlS & MATERIAlS REquIRED

• Pipe Tee or “Y” fitting and appropriate fittings for pipe and the NPT gland connector supplied with the heating cable

• Screwdriver • Adjustable pliers/vise grips

• Electrician’s fish tape • Clean, dry cloth or rag

• Hacksaw • Safety glasses and gloves

• Pipe wrench • 500 Vdc megohmmeter

• Permanent marking pen • Pipe “Tee” or “Y” adaptor

• Tape measure • Pipe clamps (for plastic pipe)

• Ohmmeter or multimeter • Pipe fittings for inlet & outlet pipe

• Teflon tape • Torque and adjustable wrenches

• Do not install the heating cable in pipes with sharp bends, nor through valves or a shut-off of any kind.

• Do not unduly work or bend the heating cable (minimum inside bend radius is 6 times the outside diameter of the cable).

• Bend the heating cable gently and avoid repeated sharp bends, pinching, crimping, or flattening.

• Do not cut the heating cable or alter the heating cable length.

• The minimum installation temperature is –30°C (-22°F).• Do not use with any voltage other than that specified on

the metal tag.

• Do not energize the heating cable before installation is complete and the pipe is filled with liquid. Never energize the system if the pipe is not filled.

• The temperature controller must be installed in a dry location.• The temperature sensor must contact the pipe at all times or it

could sense an incorrect temperature.• Power must be supplied from a circuit with 30-mA ground-fault

equipment protection (or per national and local codes).

NOTE: Products marked with ‘X’ designation comply with NSF/ANSI-61 potable water requirements.


Pipe

Closed cellinsulation (if required)

Test 1Insulation resistance

Test 2Continuity

Tails

5001000150020002500

Tails

To outletpipe

Fitting withinternal thread

to match NPTgland supplied

with heating cableTo inletpipe

It is recommended that an electrician’s fish tape be inserted into the pipe to verify that it will pass through the entire length of pipe without obstruction and to verify the pipe length. The pipe should be approximately 6 in (15 cm) longer than the heating cable. Do not install the heating cable in pipes with sharp bends, valves or other obstructions.

Before installation, check the insulation resistance (IR) of the heating cable using a megohmmeter and resistance using an ohmmeter. Minimum acceptable IR is 100 Megohms. The resistance of most heating cables is generally less than 100 ohms. Record the results of the tests.

Assemble appropriate Tee or Y adaptor and necessary couplings, reducers, pipe adaptors, etc. (see Appendix A). The cable should pass through the in-line segment of the Tee assembly as shown in Appendix A. These instructions will show installation using a Tee adaptor and appropriate fittings.

If a Y adaptor is used, the heating cable will be inserted through the angled segment of the ‘Y’ adaptor as shown in Appendix A.

Note: Pipe fittings required will vary depending on type and size of pipe used (plastic or metal).

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2 3

Note: If a new pipe is being installed, do not install the pipe in which the heating cable will be inserted in such a way as to cause sharp bends in the pipe.


Inlet pipe(plastic pipe shown) Pipe clamp Tee assembly

Uncoil/feed heating cablefrom this end of pipe

Fish tape (pull from end of pipe)

Pipe

Pulling eye

Fish tape (fed from far end

of pipe)

Heating cable

Non slipping knot

2 ft (60 cm)minimum

Rope

Reversed glandon heating cable

cold lead

Compressionnut

Cold lead

Attach the Tee or Y assembly to the pipe (inlet), per local codes.

Pull the heating cable slowly into the pipe, with a second person uncoiling/feeding the heating cable into the pipe from the other end. Pull the heating cable all the way into the pipe. The end of the heating cable will not be visible, since the pipe is longer than the heating cable. However the string will appear, and can be cut and withdrawn completely by simply pulling through (the knot is cut off to ensure it does not snag in the cable loop and prevent the string from being removed).

Important: Do not install a heating cable with a loading greater than 5 watts/foot in plastic pipe. This can be determined by dividing the wattage by the length of the heating cable (see metal tag attached to cold lead).

Heating cable lengths 40 ft (12 m) and shorter can simply be pushed into the pipe, however, an electrician's fish tape is recommended for all lengths.

Starting from the end of pipe away from the power supply end, feed the fish tape back through the pipe. Tie the end of the fish tape to the pulling eye (or loop) of the heating cable, using a long piece of rope, so that the end of the fish tape is separated by about 2 ft (60 cm) from the pulling eye/loop and locate the knot at the fish tape end.

Once the cable is inserted, fasten the threaded reversed gland into the reducer coupling using appropriate materials (teflon tape, gasket sealant, etc.) and tighten into coupling. Next, tighten the compression nut to the torque settings indicated on the tag attached to the glands (tightening the compression nut forms a watertight seal).

Note: Do not overtighten reversed gland assembly.

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Outlet pipe

Attach temperaturesensor to pipe at least 3 ft (1 m)away from outer wall of heated structure

TapeInletpipe

Outlet pipe

Sensor lead

Temperature controller (mount in a dry location)Cold lead

Check for leaks

Check for leaks

Closed cell(waterproof)

insulation Pipe

Temperaturesensor

Attach outlet pipe to the tee opening per local codes, using appropriate materials. If a Y adaptor is used, the outlet pipe is attached to other end of the in-line segment of the Y adaptor as shown in Appendix A.

Mount temperature controller in a suitable location and attach temperature sensor to pipe using tie-wraps or tape.

The temperature sensor MUST be attached to the coldest section of pipe where liquid will flow. Do not mount temperature sensor on a section of pipe that is indoors or on a section of pipe where liquid will not flow. Do not leave temperature sensor exposed to sense air temperature.

Turn on water supply to pipe and check installation for leaks.

If called for in the design, install insulation of the required thickness and type over entire pipe (with and without heating cable inside). If the pipe is buried, install closed-cell (waterproof) insulation of the required thickness over entire pipe.

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Aluminum tape coveringseams in insulation

Temperaturecontroller

Conduitto power

supply

Cold Lead

Test 1Insulation resistance

Test 2Continuity

Tails

5001000150020002500

Tails

Cover seams and joints in insulation with aluminum tape or other suitable material to prevent water from entering the insulation. Exposed pipe may require that the insulation be covered with a waterproof jacket.

Connect the cold lead into a UL Listed or CSA Certified junction box/temperature controller per local codes.

Before connecting the cold lead to the junction box, check the IR of the heating cable to verify that the cable has not been damaged during installation - the minimum acceptable IR is 20 Mohms. Check the resistance to verify that it has not changed. Record the results of the tests. Damaged cables must be repaired; contact Pentair for assistance.

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APPENDIx A: TyPICAl HEATINg CAblE INSTAllATION

Temperaturesensor

Inletpipe

Sensor lead

Pipeclamp

Outlet pipeGland connector tojunction box/temperaturecontroller

Cold leadCompression nut

Reversed glandTee adaptorInsertadaptor

Close nipple

Reducer coupling

Inlet pipe Outlet pipe

Close nipple

Reducer coupling

Compression nut

Reversed gland

Cold lead

Temperaturesensor

Pipeclamp “Y” adaptor

Insertadaptor

Sensor lead

Gland connector tojunction box/temperaturecontroller

Installation using a Tee adaptor

Installation using a “y” adaptor


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internal pipe tracing - nventthermal.com a section of pipe where liquid will not flow. do not leave...

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