Flextherm GreenCableCONCRETE Guide D'installation page 3

If an automatic multimeter is used the reading will be taken instantly. If the
multimeter is not automatic, set it to 200 Ω for a cable under 200 Ω or at
the higher value for a cable over 200 Ω. The resistance value of the cable is
indicated on the label attached to the end of the cold lead. Compare the test
result with the resistance indicated on the label. Record the results on the
limited warranty card. The measurement should be similar to the resistance
indicated on the cable label (± 10%). The cable's resistance was established
in an environment at 20 ˚C (68 ˚F). If you obtain a reading that does not
correlate with these parameters contact FLEXTHERM customer service at
1 800 353-9843.
Insulation Verification
Use a megohmmeter to verify the cable insulation integrity. Connect the
instrument's black cable to the system ground wire (the green lead) and
the red cable to one of the heating elements (black leads), and then send
a 1000 V current (picture 2). This result should be "infinite" ohms. Should there
be a current leakage between the heating element and the insulation the
appliance will indicate a result between 0 and 500 MΩ.
Record the Results
IMPORTANT: Record the results obtained for these two tests
on the limited warranty card every time you perform them:
before breaking the seal, after the cable is secured to the mesh
and after it is buried in concrete. These results must be
recorded on the warranty card in order to preserve the system's
limited warranty.
Should the results obtained not comply with cable specifications, do
not break the cable seal and contact FLEXTHERM customer service at
1-800-353-9843.
Preliminary Electrical Installation
Circuit
Floor heating systems should be connected to electrical circuits dedicated
to heating. The amperage drawn by the cable sets, as indicated on the cable
labels, will determine the required circuit intensity. Please take note that the
maximum load that can be supported by a FLEXTHERM thermostat is 15 A.
More than one circuit will be necessary should the system require more than
15 A. For a load greater than 15 A, use the appropriate number of expansion
units. For further information regarding their connection, please refer to the
literature included with those products, also available on the FLEXTHERM
web site at www.flextherm.com.
Electrical Connection Box
Determine where the thermostat connection box will be installed. It should
be in an accessible location, in the room where the system is installed and at
an appropriate height.
Use an expanded thermostat connection box or a 4 in x 4 in box for the
system connection (plan one connection box for each 15 A circuit). On
the first end of the cable is a 3 m (10 ft) cold lead to make the appropriate
connection. Note that the floor probe is included in the FLEXTHERM
thermostat box.
Green Cable Concrete Installation Guide
Note: Keep the cold lead ends of heating devices and kit components dry
before and during installation.
Cold Lead
The cold lead is the non heating part of the cable that will run in the wall
to connect the system to the thermostat. The cold lead is flat and black. It is
connected to the heating cable with a mechanical joint. Just like the heating
cable, the mechanical joint must be embedded in the concrete slab.
Determine the location where the mechanical joint will be fastened. Slide the
cold lead inside a cable conduit according to the local and national code in
force in your area. Pull on the cable until the mechanical joint is at a distance
of about 30 cm (12 in) from the cable conduit bottom edge (picture 3).
Picture 2
Anchor it to the mesh with FLEXTHERM adhesive tape (picture 4). Ensure that
the mechanical joint is attached outside of the cable conduit and in the zone
where concrete will be poured.
In a multiple cable installation, repeat these steps for each cable installed.
IMPORTANT: Connect the cable to the thermostat only once
the cable has been installed and covered.
Picture 3
Picture 4
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