Fenix MAPSV 30 - Manual (Page 8)

8
cable length.
EXAMPLES OF LAYING MAPSV CABLE
c) Regulation
 To avoid exceeding the upper limit of the cable’s thermal resistance, which could occur due to
improper use (such as by operating the heating system in the summer months) and in respect of
economic operation, the installation must be equipped with one of FENIX’s available thermostats,
such as EBERLE EM 524 89/90 + moisture probe ESD 524 003 + thermal sensor TFD 524 004.
3. Heating outside areas (anti-freezing protection)
a) Dimensioning
If the heating is intended to be used on open areas with soil as a base and on thermally insulated
surfaces, set the flat output to 200–300 W/m
2
. If the heating is intended to be used on surfaces that are
not thermally insulated, set the output to 250–350 W/m
2
. The value of the output depends, among other
things, on the depth to which the heating system is installed. That means that the closer the installation
is to the surface, the lower the output needs to be within the recommended range. If installed into fine
washed sand, the installed flat output must not exceed 300 W/m
2 .
Starting up of the heating system is dependent on the layout of heating circuits/mats, control
settings and outside temperature. When placed in (on) concrete, the reaction is further delayed
due to heat accumulation and dissipation in the concrete. A visible reaction (defrosting) may take
several hours.
b) Installing into concrete
Procedure

Create a compact underlying layer of gravel 150–300 mm thick. This can be regarded as the thermal
insulation. You can find information about the effect and importance of high quality thermal insulation
(e.g. on the basis of extruded polystyrene) on the FENIX internet pages – category
ECOFLOOR/Outdoor applications, or you can consult a technician regarding its use.

Place the heating cable in an open-looping pattern on the reinforcing grid and fix it with fastening
strips. The heating cable must not be too tightly affixed or it could be damaged due to the thermal
expansion of the concrete.

Place the reinforcing grid in the middle, and at maximum 2/3 down into the concrete layer.

Measure the resistance of the heating circuit and the insulation resistance and record the measured
values in the certificate of warranty.

Draw the scheme of the heating cable layout in the certificate of warranty.

Cover the cable with a concrete layer. The concrete layer must be monolithic so that individual layers
do not separate due to thermal stress.

Measure the resistance of the heating circuit and the insulation resistance again and record the
measured values in the certificate of warranty.

The concrete mixtures must contain ingredients protecting it against external effects.