Nexans TQXP XTREME-2R Resistance Cables User Manual

Nexans TQXP XTREME-2R Resistance Cables

Important! Before the installation starts

Read through these installation instructions before any work starts.
This product shall only be installed by qualified personnel, who are familiar with the construction and operation of the product and risks involved. The installation of this heating product shall be in accordance with the manufacturer’s instructions and the regulations of the authority having jurisdiction.

General guidelines
The installation of this heating product shall be in accordance with the manufacturer’s instructions and the regulations of the authority having jurisdiction. For US, the installation shall bemade in accordance with Article 424. Part IX of the National Electric Code, ANSI/NFPA 70.

Product description TQXP/2R

Series resistive twin conductor heating cable, with a metallic alloy as the warm conductor and a multistranded copper wire as the return conductor. The heating cable has a factory fitted end seal and an integrated hidden splice (marked SPLICE on the cable) between the cold lead and the heating element itself.

Product description TXLP/2R
Series resistive twin conductor heating cable, with a metallic alloy as the warm conductor and a solid copper wire as the return conductor. The heating cable has a factory fitted end seal and an integrated hidden splice (marked SPLICE on the cable) between the cold lead and the heating element itself.

Product description TXLP/1
Series resistive single conductor heating cable, with a metallic alloy as the warm conductor. The heating cable has two integrated hidden splices (marked SPLICE on the cable). These are at each end of the cable, providing two cold leads connected to the heating element itself.

Technical data

• Conductor insulation: PEX
• Outer sheath: PVC
• Linear load: 10 or 17 W/m
• Rated voltage: 230V
• Highest system voltage: 300/500 V
• Max. cont. operating temp. outer jacket: 65°C
• Min. bending radius: 5 x cable diamenter
• Tolerance on conductor resistance: -5/+10%
• Mechanical class: M2
• Length of cold lead: 2.3 m
• UV resistant: Yes
• Minimum installation temperature: 0 °C (32 °F)

(Working with the product at lower temperatures will require extra precautions, and is not recommended).

Application

The main area of use for TQXP/TXLP is underfloor heating, embedded in concrete or similar. Cable output [W] and output per meter [W/m] are determined with regards to room size and type, type of installation and floor type. The heating cable can be used both in new and renovation projects. It can also been used for frost protection, ice and snow melting installations.

Measure insulation resistance and heating element resistance before the cable is taken out of the package. The heating cable should never be installed directly in contact with combustible materials, except where the following condtions are met:

• The heating cable has an output per meter of 10 W/m (3 W/ft) or less
• Area power 80 W/m² (7,5 W/ft²) or less

To prevent high temperatures in the floor construction the following must be followed (restrictions to area output and linear output):

• Max. 80 W/m² (7,5 W/ft²), max 10 W/m (3 W/ft) in wooden floors*.
• Max. 80 W/m² (7,5 W/ft²) when the top surface is parquet, laminate, or carpet.
• Max. 160 W/m² (13,9 W/ft²) when the top covering is stone, tiles, vinyl or linoleum.

When installing heating cables beneath a wooden floor it is recommended to contact the vendor of the floor, to ensure the floor is suitable for the planned heating system including output in W/m² (W/ft²). Some wooden floors, allow a maximum area power as low as 60 W/m² (5,6 W/ft²) and restriction on maximum surface temperature as low as 27˚C (81˚F).
In floors with vinyl/linoleum, a maximum of 100 W / m² installed surface power is recommended to avoid the risk of discoloration.

Picture 1
Measure insulation resistance and heating element resistance before the cable is taken out of the package. Write down the values in the warrenty form

Picture 2
Plan the installation first and then lay the cable in the precalculated C-C distance on the subfloor. It is recommended that the subfloor is insulated to reduce heatloss downwards. However the heating cable must not be in contact with the insulation or pressed down into it. This can be prevented, e.g. by installing the cable on chicken wire. It is often a good choice to start with placing the splice(s) in the floor near the thermostat. The splice(s) must not be placed in a tube or in a wall. The endseal of a twin conductor cable is preferably placed in a dry zone of the floor. Apply glue, attach bands, or fix cable ties to keep the heating cable in place at the correct C-C distance. It is important that the cable will stay in place when the floor is poured. Keep the correct distance (C-C) between cables, and avoid at all times overlapping or crossing of cables, as this causes unwanted thermal effects. If attaching the heating cable to reinforcement bars, longitudinal bars are preferred. The heating cable shall not be attached to pipes in the floor or other components preventing heat flow, minimum 3 cm distance. Be aware that the cable will be exposed during installation to mechanical damage when placed on reinforcement bars. Heating cables should not be installed beneath kitchen cupboards, walls or other permanent installations which do not allow air circulation. Furniture that stands on the heated area must have feet to ensure that air can circulate and that heat emission from the floor is possible.

The heating cable is never to be cut or shortened in any way.
If a floor sensor is connected to the thermostat this should be installed inside a tube exactly between two cable strings in the floor, close to the floor surface. The end of the tube should be sealed with tape. When installing the sensor in a tube, it can be changed later if needed. Make a drawing of the installation and/or take a photograph for future reference before pouring the floor. If other cables (Supply conductors or cables which are not a part of the heating cable installation) are embedded in the heated floor these must be placed at least 2” (51 mm) away from any heating cable.

Picture 3
Avoid stepping or dropping items on the cable and use caution in further works with pouring the floor.

Picture 4
Measure insulation resistance and element resistance after the cable has been installed but before any concrete/screed/mortar is poured. To build a good and efficient heated floor the slab on the subfloor containing the heating cables must have good heat conductivity to create an even temperature throughout the slab, securing efficient heat emission from the cable to the room.

Picture 5
When embedding heating cables in concrete/screed/mortar this must be mixed correctly as prescribed by the vendor. Mix the materials well, before pouring the concrete/screed/mortar onto the subfloor and the cables.

Picture 6
The heating cable must be embedded with minimum 5 mm (0,2 inches) concrete/screed/mortar above the cable when the top floor covering is tile or stone. The minimum is 10 mm when the top floor covering is vinyl, linoleum, carpet, engineered wood or other.

Picture 7
Compact well to prevent air pockets and a porous slab. The concrete/ screed/mortar must surround the cable entirely to ensure good and necessary heat conductivity from the cable to it’s surroundings. Good heat conductivity is important for the function of the floor, but also to prevent excessive temperatures. Some concrete types can be mixed with small amounts of water as specified by the vendor. In these cases pay special attention to the mixing and the compacting as these floors easily becomes porous and thereby thermally insulating. It is recommended to use concrete/screed/mortar designed for heated floors. Thermally insulating types cannot be used.

Picture 8
The heating cable is not to be used before the concrete/screed/mortar has naturally hardened and dried. This can take up to 6-8 weeks. Please consult the instructions/guide provided by the vendor of the concrete/ screed/mortar.

Picture 9
A thermostat is recommended to regulate the heating cables. Before this is connected measure the insulation resistance and the element resistance of the heating cable to check cable integrity. This will also reveal any damage done to the cable during installation. The documentation coming with the thermostat is to be delivered to the owner of the installation, being a part of the total documentation of the heating cable system. The heating cable must be connected to electrical earth properly and always be protected by a ground fault protection device. This device should have a maximum trip value of 30 mA. If installing more than one heating cable in a room both cables can be connected to the thermostat. However ensure the cables are connected in parallel (not series), and that the total power output does not exceed the limit of the thermostat.

IMPORTANT! When installing a 3300W twin conductor heating cable, the cold leader must be installed in seperated tubes to the thermostat.

IMPORTANT! CONNECTION INSTRUCTIONS

The cold lead has an information text on it, showing the cross section area of the copper conductors. This will either be 0,5 mm², 0,75 mm² or 1,0 mm². The following apply.

TQXP multistranded red conductor (0,75 or 1 mm²)
If connecting one multistranded conductor to a terminal, attach a metal crimp (use crimping tool) to the connecting end before fastening.

TXLP 1,0 mm²
Connect normally.

TXLP 0,5 mm²

• If connecting one conductor (0,5 mm²) to a pillar terminal without pressure plate, attach a metal crimp (use crimping tool) to the connecting end before fastening the screw.
• if connecting one conductor (0,5 mm²) to a pillar terminal with pressure plate, the conductor can be connected and fastened normally like a 1,0 mm² conductor.
• If connecting two or more conductors into the same terminal (regardless of type) do the following: Attach a metal crimp (use crimping tool) over any multistranded and0,5 mm² conductor(s) and place the crimp(s) covering the conductor(s) into the terminal. Then fasten normally.

Advice regarding thermostats and regulators
Electrical floor heating gives a very comfortable and economical heat. Floor heating is somewhat slower to regulate than wall mounted heating and the best results are achieved when using an electronic thermostat for temperature control. In wet rooms it is common to use a thermostat with a floor sensor only. Comfortable bare foot temperature is usually around 26˚C (79 ˚F).

User manual
The heating cable system should not be turned on before the floor has hardened naturally. The thermostat or control system must be used according to the manufacturer’s instructions. Avoid drilling, cutting, attaching bolts or similar in the heated floor. If this must be done contact an electrician who can help locate heating cables. Documentation of the heating system received from the installer should provide information on where the cables are located.

In rooms with an area power of 100 W/m² or more (for example in a bathroom) carpets are not to be used. Caution is to be taken when placing insulating items on the floor such as diaper packages, heaps of clothes and so on. Such items should preferably be placed in other areas. In rooms with an area power of 100 W/m² or less, pay attention when placing insulating items on the floor, for example carpets or furniture without feet. Permanent installations covering a room area should always be installed in nonheated areas.

Product Warranty

All of our heating cable units and their components are thoroughly tested during production. The final test is a high voltage test and measurement of the conductor resistance. Only the units which have passed the tests are sent to the market.
Nexans Norway offers a 20 year warranty on defects in material and workmanship in the sold product, under proper and normal use and service. In case of a defect, Nexans Norway will repair or replace the product. Please see the terms of warranty for further details. The warranty does not extend to defects caused by a faulty installation.

For the warranty to be valid these installation instructions must be complied with. The written form inside each box containing a product must be filled in. This is to ensure a correct installation and that no damage has been done to the product during the installation. If, during the installation,
a heating cable is defect, it shall have to be replaced before the construction is finished. Nexans Norway must be given notice of any defect within 30 days after the defect was discovered, and the warranty form correctly filled in must accompany the claim in order for the warranty to be valid.

Certificates and approvals

Certificates and approvals are subject to change. Please visit our website at www.nexans.com/heating to find updated information regarding certificates. The heating cable TQXP/TXLP is tested in conformity with IEC 60800, EN 50265 / IEC 60332-1.

Warranty form – Heating cables

Terms of warranty

Nexans Norway warrants the products manufactured by it to be free from defects in material and workmanship at date of delivery and for a period of twenty (20) years thereafter, under proper and normal use and service. Nexans Norway’s responsibility does not include defects caused by material obtained by the buyer or by constructions specified by it. Nor does Nexans Norway have any responsibility if the use of the product has been outwith the intention of the contract as presented to Nexans Norway. Nexans Norway further warrants that the products will have passed those performance tests, if any, called for in the applicable specifications. The buyer must give Nexans Norway written notice of any defect within thirty (30) days following the discovery of the defect, and in no event later than two (2) weeks after the expiry of the warranty period. The notice must include a description of the defect and how it manifests itself, and the warranty form correctly filled in. The right to claim will be lost if the buyer does not present the notice within the time limits in this sub-clause. If there is reason to believe that the defect can cause a risk for bodily injury, property damage or pollution, notice must be given immediately. Unless notice is given immediately, the buyer will lose its right to claim damages for any event and any loss which could have been avoided if such notice was given.

Furthermore, the buyer should indemnify Nexans Norway for any claim from third parties related to such event or loss. If, during the applicable warranty period, the products manufactured by Nexans Norway are found to have been defective when delivered they will be repaired or replaced without charge FOB named port of shipment. In no event shall Nexans Norway be liable for the expenses of removal and reinstallation of the defective products or defective parts of the products. If the buyer has given such notice as specified, and no defect for which Nexans Norway is responsible is found, Nexans Norway is entitled to be compensated in full for any work done by it in response to the notice and any cost incurred. The replacement or repair of defective products or defective parts of the products and price reduction, as aforesaid, shall be the buyer’s only remedy. Nexans Norway shall have the option of removing and reclaiming the products at its own expense and of repaying to Buyer all sums received on account of the purchase price, in which event all liability of Nexans Norway shall terminate. No allowance will be made for repair or alterations made without the written consent of Nexans Norway, in which event all Nexans Norway’s warranties shall be void and of no effect. The buyer agrees to assume responsibilities and pay for such defects which are attributable to it and for damages which may occur to the Products after delivery to it.

Limitation of warranties: All Nexans Norway’s warranties of the products are expressly set forth in this clause and are in lieu of any warranty of merchantability or of fitness for a particular purpose and other warranties of any kind, whether express or implied, in fact or by law, save for the implied warranties of Nexans Norway’s title, its right to transfer the products and the freedom thereof from encumbrance. The warranties and remedies set forth herein are further conditioned upon the proper receipt, handling, storage and installation of Nexans Norway ’s furnished Products, upon the Products not being operated beyond their rating and, in all respects, having been operated and maintained in a normal and proper manner and not having been subjected to accident, alteration, abuse or misuse.

Nexans Norway AS, Freserveien 1, 0196 Oslo, Norway
Phone: + 47 22 88 61 00, www.nexans.no
NEXANS NORWAY AS reserves the right to implement product changes without prior notice.

References

• Nexans - Varmekabler
• Nexans - Varmekabler
• Nexans - Varmekabler og varmekabeltilbehør
• Nexans - Nexans Norway

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