Raychem T2BLACK Floor Heating Cable Instruction Manual

Raychem T2BLACK Floor Heating Cable

GENERAL INFORMATION

• Check that delivered material matches the delivery note.

• Read through the instructions completely before you begin the installation work.

• The installation of heating cables must comply with the safety regulations, restrictions and national electrical rules in the country.

• For guidance on floor construction in regards to the construction materials, structures, building regulations and floor covering – follow the material manufacturer’s instructions.

• Measure the insulation resistance and resistance of the heating cable. Insulation resistance value should be at least 100 MΩ and heater circuit resistance value in accordance with the resistance (R) in the design table. All these measurement values should be recorded continuously in the intended field in the installation protocol. Remember to make a sketch of the installation.

• The heating cable may be fitted directly to non-flammable subfloor (e.g. cement, plaster, filler or tiles) and they may only be laid in such way that they are not subjected to mechanical stress.

• The lowest installation temperature during installation is +5°C.

• The heating cable may never be cut or shortened.

• The heating cable must not be crossed over itself or lie gathered in the same place!

• The minimum bending radius for the heating cable is 30 mm.

• The heating cable may not be installed under fixed furniture and the heated floor may not be covered with a thick carpet or insulation that might risk overheating the cable.

• The heating cable may not pass through thermal insulation or crossing expansion joints.

• The heating cable must be installed in a medium of equal thermal conductivity.

• The joint between the cold lead and heating cable must be installed in the same medium as the heating cable and must not be positioned in the protective conduit. Handle the joint with care, i.e. do not bent or pull the joint and it must not be drawn up into the protective pipe. Secure the joint against the subfloor or reinforcement.

•  The thermostat sensor should be placed in a protective conduit in the floor between two cable runs. Remember to seal the ends of the protective conduit, so that filler or concrete does not get into the tube.
  This allows the thermostat’s sensor to be changed if necessary.

• Information of the installation has to be kept visible at the electrical distribution board.

• To ensure electrical safety earth leakage circuit breakers of max 30 mA shall be used.

• Determine the required heater spacing between the cables for the required power output; see the design table in this document. Use the following formula to calculate the appropriate spacing:

• Measure the insulation resistance and resistance of the heating cable:

  • Before heating cable installation
  • After heating cable installation
  • After application of filler/cement

• Insulation resistance shall be at least 100 MΩ. The supplier cannot be held responsible for claims that should have been discovered at this stage. Resistance value (R) – see the design table in INST324 (Commissioning report).

• All these measurement values should be recorded continuously in the intended field in the installation protocol. The installation protocol should also include a dimensioned sketch or photo of the installation. Alternatively all measurements can be recorded in the InstalPRO360 app (see installpro360.eu).

NVENT RAYCHEM T2BLACK-20

• The heating cable is designed for installation in concrete of approx. 30-50 mm.
• The cable output is approx. 20 W/m.
• The minimum spacing for the heating cable is 135 mm.
• The maximum installed power output for the heating cable is 150 W/m2.

NVENT RAYCHEM T2BLACK-12

• The heating cable is designed for installation in filler layer of approx. 10-30 mm.
• The cable output is approx. 12 W/m.
• The minimum spacing for the heating cable is 80 mm.
• The maximum installed output for the heating cable installation is 150 W/m2.

INSTALLATION OF THE HEATING CABLE

1. Start the installation off the heating cable and secure the joint between the cold cable and the heating cable against the subfloor or reinforcement.
2. Roll out and place the heating cable with designed spacing.
3. Fasten the heating cable to the subfloor construction in such way that the cable is not subjected to mechanical stress. Fix the cable with a distance of approx. 0.25-0.30 m. Do not install the heating cable under surfaces where holes will be made, e.g. for water closets, or under fixed furniture. Place the heating cable at least 50 mm from the wall so that fastening of possible skirting boards cannot damage the heating cable.
4. All the heating cable must be installed within the floor as it cannot be cut or shortened. Make adjustments of the cable spacing when necessary.
5. Place the thermostat sensor in a protective conduit between two adjacent cable runs.
6. For information about the thermostat – follow the supplier’s instruction.
7. Control that the heating cable does not cross over itself.
8. For information about floor construction such as primer/filler/protective layer/grout/joints/floor covering – follow the supplier’s instructions.
9. Connect the heating cable to 230 V supply if the measured values are correct.

Note: The floor heating should normally not be switched on for at least 28 days. Follow the instructions provided by the filler /floor supplier.4 | nVent.com/RAYCHEM

CONSTRUCTION DRAWINGS

T2BLACK-20

1. Top Flooring Tiles
2. Tile adhesive
3. Watertight barrier (when applicable)
4. Casting of concrete 30-50 mm
5. Heating cable
6. Adhesive primer
7. Fixing strip or reinforcement
8. Cement floor structure
9. Thermal insulation

T2BLACK-12

1. Top Flooring Tiles/plastic matting/wood or laminate

2. Tile adhesive (when applicable)

3. Watertight barrier (when applicable)

4. Fine/coarse casting of concrete 10-30 mm

5. Heating cable

6. Adhesive primer

7. Fixing strip, metal grid or antifracture membrane (installed in accordance with manufacturers instructions)

8. Cement floor str

9.  Thermal insulation

10. Top Flooring Tiles/plastic matting/wood or laminate

11. Tile adhesive (when applicable)

12. Watertight barrier (when applicable)

13. Fine/coarse casting of concrete 10-30 mm

14. Heating cable

15. Adhesive primer

16. Fixing strip, metal grid or antifracture membrane (installed in accordance with manufacturers instructions)

17. Load-bearing subfloor

18. Thermal insulation

TOTAL CARE WARRANTY

12 years Total Care Warranty covers all our under floor heating products when installed by an authorized electrical installer. 20 years Total Care Warranty is valid if the installation is carried out by a Certified PRO installer.
The Commissioning report (INST324) should be completed, (stamped) and signed by the qualified electrician, who carried out the installation. Alternatively all measurements can be recorded in the Install PRO360 app (see installpro360.eu).

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