15 / 64
RAK57W / 3.5.2021
• The heating cable must be completely covered with a leveling compound.
• The minimum radius for bending the heating cable is 30 mm.
• The heating mat must not be installed in a class 0 space.
• In wet areas ensure, that the waterproong is made according to local building regulations.
• The heating mat must be installed in a medium of equal thermal conductivity over the whole installa-
tion area. The heating cable must not touch or overlay itself or the cold cable at any point.
• The joint to cold lead and cable termination have to be in the same medium as the heating cable. They
must not be bent and they must be xed suciently close to the base or reinforcement mesh. The cold
lead must be protected with a conduit.
• The heating cable must not be passed through the thermal insulation, exception the cold lead.
• The heating cable must not cross a construction joint or be laid in an area where there is a danger of
the slab cracking or overheating.
• The heating cable must not be installed in areas where there is a danger of overheating. The distance
to a sauna stove, heat storing re place or other radiant must exceed 0,5m.
• The oor materials and structures must comply with the manufacturer’s instructions and approved
building methods.
• The suitability of the oor material for underoor heating must be ensured with the manufacturer.
• In a oor in which a ThinMat heating mat has been installed the heating resistance must not exceed
0,125 m²K/W.
• The thickness of the ooring material covering the cable must be greater than > 5 mm.
• The lowest installation temperature is -5 °C.
• The oor to be heated must not be covered with a thick or otherwise well insulating carpet.
• The thermostat sensor is installed in a protective tube. The sensor must be positioned between the
heating cables so that it does not touch the cable. The end of the sensor tube must be made water-
tight.
• Protect the heating mat from damage in the event of possible repair work on the installation site.
6 General Electrical Installation Instructions
• A fault current switch with a nominal operating current of max. 30 mA must be used in installations.
• A suitable thermostat must be used to control the heating.
• The oor heating installation must be provided with an all-pole, overvoltage class III separating device.
For example, Ensto’s oor 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, other consumer appliances must not be connected
to the same branch circuit.
• The condition of the heating cable must be inspected before and after casting by measuring the cable
resistance (Rj) as well as the insulation resistance (Re) between the supply wires and the earth wire,
see gure 7 on page 4.
• The heating cables must not be switched on before the concrete screed has dried out. Follow the con-
crete screed manufacturer’s instructions.
7 Installation Protocol and Warranty
• The Installation protocol must be completed properly and carefully. The Installation Protocol and
these installation instructions must be stored in a safe location so as to be available after installation.
• Proper heating cable loop resistance (Rj) and insulation resistance (Re) measurements as well as ac-
cordingly 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 ThinMat heating cable is 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 the product card www.ensto.com.