Ensto tassu9 [12/29] General

Ensto tassu9 [12/29] General
12
GENERAL
- Read thoroughly through the installation instructions before you begin the installation work.
- Installations of heating cables must comply with the safety regulations, rules, restrictions and dimensioning regu-
lations of the country, region and electricity utility.
- Underfl oor heating loops are intended for underfl oor heating installations and they may only be laid on top of
non-fl ammable material in such a way that they are not subjected to mechanical stress.
- The joint to cold lead and termination of cable have to be left in same medium as the heating cable. They must
not be bent and they must be fi xed suffi ciently close to the base or reinforcement mesh.
- It must be possible to isolate the heating cable with an operating switch or with a branch circuit breaker which can
also be on the control circuit. Close to the switch there must be position indication markings or an indicator light
to indicate operation, as well as a sign in text indicating the installation, such as ‘UNDERFLOOR HEATING’.
- The condition of underfl oor heating must be inspected before and after casting by measuring the insulation
resistance and cable resistance between the wires and the sheathing.
- In premises where there is an explosion hazard, other consumer appliances may not be connected to the same
branch circuit.
- If socket outlets are connected to the same branch circuit in other installations, the branch circuit must be protected
with a RCCB (Residual Current Circuit Breaker).
- A heating cable may not be installed in a class 0 space.
- In bathrooms and other such rooms, a RCCB with normal tripping current 30 mA should be used with under-
oor heating.
- Plans and working drawings must be made of the installation of heating cables. Both must be made by a suitably
qualifi ed electrical contractor or electrical designer in accordance with the manufacturers instructions and in comp-
liance 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
- It is a condition of the guarantee that suitable measurements are made of the cable resistance and insulation resis-
tance and that a measurement report is made according to the readings.
- The heating cable must not be passed through the thermal insulation; it must be installed in a medium of equal
thermal conductivity. In an exceptional case, the cold lead may be passed through thermal insulation. The heating
cable must not go through an expansion joint or areas where there is a risk that the slab may break or the heating
cable may overheat (e.g., wood-fi red sauna stove, storage heating fi replace, distance 0.5 m).
- Working drawings must be complied as precisely as possible and changes must be indicated on the fi nal
drawings.
- The curve of the thermostat (for instance ECO10F) sensor’s protective pipe must be such that the sensor element
can be replaced if necessary. The sensor must be positioned between the heating cable in such a way that it does
not touch the cable.
- In the fi nishing treatment of construction materials and in questions related to the structures, the instructions of
the material manufacturer and accepted working methods must be complied with.
TASSU
The TASSU heating cable is designed for installation in a medium with thermal conductivity of the same order as
that of concrete. The cable loading is approx. 20 W/m.
RECOMMENDED LAYING DISTANCES
Hard mineral-faced fl oors: 120-240 mm
Floors with low thermal conductivity; parquet, soft-base acrylic fl ooring, etc.: 150-300 mm
The usual laying distance for underfl oor heating is 150 mm.

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