ENSTO TASSU Underfloor Heating Cables Instruction Manual

TASSU
TASSU S

Installation Instructions

RAK105 2023-06-02
© 2021 Ensto Building Systems

TASSU Underfloor Heating Cables

TASSU and TASSU S Heating Cables
Installation Instructions

Safety Instructions

Electrically skilled person

• The installation must only be done by an electrician with the appropriate qualifications.
• Read this installation manual carefully before starting the installation work.
• Follow the instructions in this installation manual, and make sure that the installation complies with national safety regulations, installation methods and restrictions.
• The information provided in this installation manual in no way exempts the installer or user from responsibility to follow all applicable safety regulations.
• This installation manual is a part of the product and must be stored in a safe location so that it is available for future installation and service.

WARNING
Danger of electric shock! Risk of fire!

• Improper installation can cause personal injury and property damage.
• Do not operate a defect heating cable.
• Do not switch on the power supply before the installation work is completed.

Storage

• Store the heating cable and the associated components in a dry environment.
• Keep the heating cable in the sales package until you start the installation work.

Planning

• A qualified electrical contractor or electrical designer must provide plans and working drawings of the installation. Plans and working drawings must be made in accordance with the manufacturer’s instructions and in compliance with industry rules and regulations.

• The working drawings must show the following:
  » the cable type, rating and length;
  » the laying distance and the area in which the heating cable is installed.

• The installation must comply with the working drawings as precisely as possible.

• Indicate possible changes on the final drawings.

General Installation Instructions

• The lowest installation temperature is -5 °C.
• Do not install the heating cable in a class 0 space.
• Do not install heating cables under fixed structures like closets.
• Do not shorten heating cables.
• Make sure that there is not any tension on the connectors at the cable ends.
• Do not step on the heating cable.
• Make sure that the heating cable or the connectors at the cable ends are not subjected to any mechanical stress.
• Install the heating cable in a medium of equal thermal conductivity over the whole installation area.
• Make sure that the heating cable does not touch or overlay itself or the cold cable at any point.
• Do not pull the heating cable through the thermal insulation, exception the cold lead.
• Do not install the heating cable where it crosses a construction joint.
• Do not install the heating cable in an area where there is a danger of the slab cracking or overheating.
• Do not install the heating cable in an area where there is a danger of overheating. Make sure that the distance to a sauna stove, heat storing fire place or other radiant exceeds 0,5m.
• Attach the heating cable to the reinforcement mesh with a cable tie or a similar fastening method in such a manner that it does not cause permanent deformation of the cable sheath.
• Install the joint to the cold lead and the cable termination in the same medium as the heating cable.
• Do not bend the joint or the cable termination.
• Fasten the joint and the cable termination sufficiently near the base or reinforcement mesh.
• Protect the cold lead with a conduit.
• Install the thermostat sensor in a protective tube. Bend the protective tube gently so that the sensor can be replaced, if needed. Put the sensor between the heating cables so that it does not touch the cable. Make the end of the sensor tube watertight.
• In wet areas make sure that the waterproofing is made according to local building regulations.
• Follow the manufacturer’s instructions and approved building practices for surface treatment of building materials and structural issues.
• Check with the manufacturer the suitability of the floor material for underfloor heating.
• Do not cover the floor to be heated with a thick or otherwise well insulating carpet.
• Do not nail or drill a floor in which a heating cable has been installed.
• Protect the heating cable from damage in the event of possible repair work on the installation site.

General Electrical Installation Instructions

• Use a residual current circuit breaker with a nominal operating current of max. 30 mA in installations.
• Use a suitable thermostat to control the heating.
• Provide the floor heating installation with an all-pole, overvoltage class III separating device. For example, Ensto’s floor heating thermostat switches meet this requirement. The separating device may be collective or common for all heating groups. An operating switch located in the control circuit can also serve as a separating device.
• In premises where there is an explosion hazard, do not connect other consumer appliances to the same branch circuit.
• Inspect the condition of the heating cable before and after casting. Measure the cable resistance (Rj) and the insulation resistance (Re) between the supply wires and the earth wire, see figure on page 3.
• Do not switch on the heating cable before the concrete screed has dried out. Follow the concrete screed manufacturer’s instructions.

Installation Protocol and Warranty

• Complete the Installation Protocol properly and carefully. Store the Installation Protocol in a safe location so that it is available after installation.
• Proper heating cable loop resistance (Rj) and insulation resistance (Re) measurements as well as accordingly completed Installation Protocol is required for validating Ensto Building Systems Finland Oy’s warranty.
• In the installation of the Ensto heating cables into wet areas it is required that the water insulation that is used can be partly corrected / defragmented in the event of a possible defect. Report the damage to Ensto Building Systems Finland Oy or an installer authorized by Ensto before you take any actions to repair the installation.
• The warranty period for Ensto Tassu and Tassu S heating cables are 20 years from the date of purchase but no longer than 21 years from the date of manufacture. The manufacture date is located on the rating label.
• Warranty terms, see www.ensto.com/building-systems

Disposal

Do not dispose of electrical and electronic devices including their accessories with the household waste.

• The product’s cardboard packing is suitable for recycling.
• When underfloor heating system is at the end of the life cycle dispose of the cables, conduits and electronic components properly according to local recycling guidelines.

TASSU

• The Tassu heating cable is designed for installation in a medium with thermal conductivity of the same quality as that of concrete.
• The heating cable is not suitable for mounting on a wall.
• The cable loading of the Tassu heating cable is approx. 20 W/m.
• The minimum laying distance for the Tassu heating cable is 130 mm.
• The minimum bending radius for the Tassu heating cable is 40 mm.
• The maximum power per square meter for the Tassu heating cable installation is 150 W/m2.

Installation in concrete structures
1-Stage casting (Fig. A1)

1. Compacted gravel

2. Thermal insulation

3. Construction paper

4. Reinforcement mesh
   » Attach the heating cable directly to the reinforcement mesh.

5. Heating cable
   » Installation depth is min. 50 mm.

6. Floor sensor in protective tube
   » Close the protective tube watertight with a plug, tape or similar.

7. Reinforced concrete floor slab

8. Damp proofing (if necessary)

9. Ceramic tile adhesive

10. Soundproofing

11. Flooring material
    » In direct heating hard, thermally conductive (e.g. ceramic tile).
    » In storage heating, thermally insulating (e.g. parquet, cork or vinyl flooring).

12. Thermostat

2-Stage casting (Fig. A2)

1. Compacted gravel

2. Thermal insulation

3. Construction paper

4. First casting

5. Fixing strip
   » Nail the fixing strip to the base casting. It is easiest to attach the strip before the concrete is fully set.

6. Heating cable
   » Clean the surface of the slab thoroughly before you spread out the cable.

7. Floor sensor in protective tube
   » Close the protective tube watertight with a plug, tape or similar.

8. Second casting
   » The thickness of the second casting depends on the selected heating cable, desired storage charasterics and the flooring material.

9. Damp proofing (if necessary)

10. Ceramic tile adhesive

11. Soundproofing

12. Flooring material
    » In direct heating hard, thermally conductive (e.g. ceramic tile).
    » In storage heating, thermally insulating (e.g. parquet, cork or vinyl flooring).

13. Thermostat

TASSU S

• Tassu S heating cable is designed for renovation installation on top of old floors, in concrete structures, on a plasterboard or in a wooden structure floor.
• The heating cable is not suitable for mounting on a wall.
• The cable loading of the Tassu S heating cable is approx. 10 W/m.
• The minimum laying distance for the Tassu S heating cable is 90 mm.
• The minimum bending radius for the Tassu S heating cable is 40 mm.
• The maximum power per square meter for the Tassu S heating cable installation is 140 W/m2.

Installation on top of an old floor (Fig. B)

1. Old flooring
   » Prepare the old flooring according to the flooring manufacturer’s instructions.

2. Adhesion layer (Primer)
   » Spread renovation plaster according to the manufacturer´s instructions.

3. Heating cable
   » Installation depth is 20-30 mm.

4. Installation tape or mesh
   » Attach the heating cable to a concrete and slab floor with installation tape or with cable fixing strip XBC1230.
   » You can also use a mesh (e.g. a thin wire mesh, approx. 25×25 mm). Attach the heating cable to the mesh with cable ties or a similar fastening method in such a manner that it does not cause permanent deformation of the cable sheath.

5. Floor sensor in protective tube
   » Close the protective tube watertight with a plug, tape or similar.

6. Screed
   » Screed thickness is 30-50 mm when using gypsum, and 20-30 mm when using concrete.
   » Install the heating cable in a medium of equal thermal conductivity over the whole installation area.

7. Filler (if necessary)

8. Flooring material

9. Thermostat

Installation in plasterboard floors (Fig. C)

1. Plasterboard layer
   » Prepare the layer according to local building regulations and manufacturer’s instructions.
   » Leave an intact layer of plasterboard under the heating cable. Attach additional strips of plasterboard to this layer.

2. Heating cable

3. Floor sensor in protective tube
   » Close the protective tube watertight with a plug, tape or similar.

4. Plasterboard strips
   » Attach the strips to the base according to manufacturer’s instructions.

5. Grooves for heating cable
   » Lay the heating cable in the grooves.
   » Fill the grooves with stone-based plaster.

6. Filler

7. Plasterboard

8. Damp proofing (if necessary)

9. Ceramic tile adhesive (if necessary)

10. Flooring material

11. Thermostat

Installation in wooden structures (Fig. D)

1. Thermal insulation

2. Aluminium foil
   » Spread aluminium foil over the insulation to improve heat conduction and prevent the heating cable from overheating.

3. Attachment mesh
   » Spread a mesh between the fixing battens for attaching the heating cable.

4. Heating cable
   » Minimum distance to the flooring material is 30 mm.

5. Floor sensor in protective tube
   » Install the sensor at the floor joint and floor material connection point without touching the cable.

6. Crossing the fixing battens
   » Notch the crossing points to make them loose, e.g. 40×25 mm.
   » Take also into consideration the durability of the structure.
   » For flame proofing put a protective metal plate where the cables cross the runner.

7. Flooring material
   » Use a flooring material suitable for underfloor heating. Check the suitability with the manufacturer of the flooring material.

8. Thermostat
   » Use a thermal cut-out, if necessary.

Installation Protocol

Purchase date|
---|---
Attach the product label here!

Measurement table
P > 200W => Rj nom +10 …- 5 % / P ≤ 200 W => Rj nom ± 10 %
Re ≥ 1,0 MΩ

Measuring equipment

(Rj)|
---|---
(Re)|
Measurement date|
Measurement performed by|
Supervisor|
Date and signature|

RAK105W / 2023-06-02

TASSU

Type| Power| Length| Loop resistance| Floor area| Power / Area| Installation
distance
---|---|---|---|---|---|---
TASSU150W7M| 150| 7| 352,7| 1,0 – 1,9| 80
90
100
110
120
130
140
150| 250
220
200
180
170
150
140
130
TASSU200W9M| 200| 9| 264,5| 1,3 – 2,5
TASSU240W11M| 240| 11| 220,4| 1,6 – 3,0
TASSU300W15M| 300| 15| 176,3| 2,0 – 3,8
TASSU440W20M| 440| 20| 120,2| 2,9 – 5,5
TASSU500W25M| 500| 25| 105,8| 3,3 – 6,3
TASSU600W29M| 600| 29| 88,2| 4,0 – 7,5
TASSU700W35M| 700| 35| 75,6| 4,7 – 8,8
TASSU800W38M| 800| 38| 66,1| 5,3 – 10,0
TASSU900W40M| 900| 40| 58,8| 6,0 – 11,3
TASSU1000W50M| 1000| 53| 52,9| 6,7 – 12,5
TASSU1200W54M| 1200| 54| 44,1| 8,0 – 15,0
TASSU1600W72M| 1600| 72| 33,1| 10,7 – 20,0
TASSU1800W86M| 1800| 86| 29,4| 12,0 – 22,5
TASSU2200W106M| 2200| 106| 24,1| 14,7 – 27,5
TASSU3200W160M| 3200| 160| 16,5| 21,3 – 40,0

TASSU S

Type| Power| Length| Loop resistance| Floor area| Power / Area| Installation
distance
---|---|---|---|---|---|---
TASSUS105W10M| 105| 10| 503,8| 1,0 – 1,8| 60
70
80
90
100
110| 170
140
130
110
100
90
TASSUS165W16M| 165| 16| 320,6| 1,5 – 2,8
TASSUS200W22M| 200| 22| 264,5| 1,8 – 3,3
TASSUS250W25M| 250| 25| 211,6| 2,3 – 4,2
TASSUS300W29M| 300| 29| 176,3| 2,7 – 5,0
TASSUS400W42M| 400| 42| 132,3| 3,6 – 6,7
TASSUS500W50M| 500| 50| 105,8| 4,5 – 8,3
TASSUS600W59M| 600| 59| 88,2| 5,5 – 10,0
TASSUS700W71M| 700| 71| 75,6| 6,4 – 11,7
TASSUS800W79M| 800| 79| 66,1| 7,3 – 13,3
TASSUS900W87M| 900| 87| 58,8| 8,2 – 15,0
TASSUS1000W100M| 1000| 100| 52,9| 9,1 – 16,7
TASSUS1100W106M| 1100| 106| 48,1| 10,0 – 18,3
TASSUS1300W117M| 1300| 117| 40,7| 11,8 – 21,7
TASSUS1500W140M| 1500| 140| 35,3| 13,6 – 25,0

Ensto Building Systems Finland Oy
Ensio Miettisen katu 2, P.O. Box 77
FIN-06101 Porvoo, Finland
Tel. +358 204 76 21
www.ensto.com/building-systems

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