Nexans N-HEAT MILLIMAT, Manual

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MILLIMAT 150 W/m² must be installed beneath non-combustible materials.
Examples of such materials are tiles, slate, stone, vinyl, linoleum and marble.
In addition the following thermal resistance rules apply
Total thermal resistance of the floor covering (incl. carpets or similar) shall
not exceed a value of R 0,85 [ft² °F h / Btu] corresponding to RSI 0,15
[m²K / W].
Typical R-values
(thermal resistance [ft² °F h / Btu]) of top floor coverings
Material Typical thickness R-value
Ceramic Tiles 6 mm R 0,24
Vinyl-/Linoleum 4 mm R 0,25
Laminate 6-7 mm R 0,45
Parquet 13-16 mm R 0,51
Solid wood oak 16 mm R 0,54
Solid wood pine/spruce 16 mm R 0,82
Cork 4-8 mm R 0,47 - 0,94
Thin carpet, synthetic 6 mm R 0,66
Thin carpet, wool 6 mm R 0,99
Thick carpet, wool 12 mm R 1,99
Typical RSI-values
(thermal resistance [m²K / W] ) of top floor coverings
Material Typical thickness RSI-value
Ceramic Tiles 6 mm RSI 0,042
Vinyl-/Linoleum 4 mm RSI 0,044
Laminate 6-7 mm RSI 0,080
Parquet 13-16 mm RSI 0,090 - 0,111
Solid wood oak 16 mm RSI 0,095
Solid wood pine/spruce 16 mm RSI 0,145
Cork 4-8 mm RSI 0,083 - 0,166
Thin carpet, synthetic 6 mm RSI 0,116
Thin carpet, wool 6 mm RSI 0,175
Thick carpet, wool 12 mm RSI 0,350
This means some wooden and cork floors should not be installed above
MILLIMAT, and also some types of carpets should not be placed on heated
floors.
Beware!
Some wooden floors are sensitive to heat with respect to cracking and
contracting and shouldn’t be heated above 28 ºC (83 ºF). Only the
manufacturer or supplier of the floor can give the approval of any specific
underfloor heating system, and must be consulted in cases of doubt. Also,
some vinyl and linoleum coverings can be sensitive to heat with respect
to discoloring. To solve this and prevent high floor temperatures, a limiting
thermostat with a floor sensor can be installed. Recommended limiting
temperature (measured between two cables in the floor) is 35 °C.
Please also see the guidelines described in the user manual section.
8.
Measure the ground insulation and conductor resistance again before
connecting to the thermostat as a final test. Enter the results into the warranty
form. The heating cable must be connected to electrical earth properly
and always be protected by a ground fault circuit breaker (RCD/GFCI),
maximum trip level 30 mA. Connecting more than one heating cable mat to
a thermostat is possible, but make sure the total power [W] does not exceed
the limit of the thermostat.
IMPORTANT! CONNECTION INSTRUCTIONS
The cold lead has an information text on it, showing the cross section area of
the copper conductors. This will either be 1,0 mm² or 0,5 mm². The following
applies:
1,0 mm²
Connect normally.
0,5 mm²
If connecting one conductor (0,5 mm²) to
a pillar terminal without pressure plate, attach
a metal crimp (use crimping tool) to the
connecting end before fastening the screw.
If connecting one conductor (0,5 mm²) to
a pillar terminal with pressure plate, the
conductor can be connected and fastened
normally like a 1,0 mm² conductor.
If connecting two or more conductors into
the same terminal (regardless of type)
do the following: Attach a metal crimp
(use crimping tool) over any 0,5 mm²
conductor(s) and place the crimp(s)
covering the conductor(s) into the terminal.
Then fasten normally.
Complete the warranty form. This form comprises part of the total documentation
of the heating cable system, and the house owner shall receive a copy.
Some advice on
• commissioning
When the floor is finished, observe the type of floor and the floor suppliers
instructions with the respect to commissioning/initial use of the under floor
heating system.
•
thermostats and regulators
Electrical underfloor heating gives a very comfortable and economical heat.
Floor heating is somewhat slower to regulate than wall mounted heating
and the best results are achieved when using an electronic thermostat for
temperature control.
In wet rooms it is common to use a thermostat with a floor sensor only.
Comfortable bare foot temperature is usually around 26 ˚C (79 ˚F).
In living rooms and similar the use of the built-in sensor offers the most
efficient heat regulation. Many thermostats can, in addition, use a floor
sensor for temperature limiting, normally approx. 26 ˚C (79 ˚F).
User Manual
To ensure a comfortable and long lasting heated floor follow these guidelines:
• The heating cable installation is not to be turned on before the adhesive/
mortar/screed/concrete has hardened naturally.
• Thermostat or other controls must be used and programmed according to the
manufacturer’s installation instructions.
• Do NOT attach screws, bolts, nails or similar into the heated floor. If this
must be done seek help from an electrician who might be able to locate the
heating cables. The documentation of the installation will also contain useful
information.
• Avoid high temperatures:
- In rooms with an area power larger than 100 W/m² carpets shall not be
used. Caution is to be taken when placing thermally insulating items on the
floor such a diaper packages, heaps of clothes and so on.
- In rooms with an area power of 100 W/m² or less, pay attention when
placing thermally insulating items on the heated floor, for example; carpets,
furniture without feet.
- Be aware that some vinyl/linoleum floors are sensitive to heat, discoloring
of the floor can occur at high temperatures. Consult the manufacturer for
more information.
- Furniture and other permanent installations which are to be placed in the
room must either have legs allowing heat to be dissipated from the floor, or
be placed in floor areas without heating.
Product warranty
All of our heating cable units and their components are thoroughly tested during
production. The final test is a high voltage test and measurement of the conductor
resistance. Only the units which have passed the tests are sent to the market.
Nexans Norway offers a 20-year warranty on defects in material and work-
manship in the sold product, under proper and normal use and service. In case
of a defect, Nexans Norway will repair or replace the product. Please see the
terms of warranty for further details. The warranty does not extend to defects
caused by a faulty installation.
For the warranty to be valid, the installation must comply with these installation
instructions. The warranty form must be filled in. This is to ensure a correct
installation and that no damage has been done to the product during the
installation. If, during the installation, a heating cable is damaged, it will have to
be replaced before the construction is finished.
Nexans Norway must be given notice of any defect within 30 days after the
defect was discovered, and the warranty form correctly filled in must
accompany the claim in order for the warranty to be valid.
Standards/approvals
MILLIMAT is NEMKO and EAC certified
The MILLIMAT is tested in conformity with IEC EN 60335-1, IEC 60335-2-96.