Flextherm GreenCableCONCRETE Guide D'installation page 6

One turn per square is sufficient to maintain the cable in place. Being secured
in this manner, the cable is kept in place evenly (picture 7).
Apply a slight tension to the cable to ensure that it remains parallel. When
changing the cable direction, or at the end of a run (loop), ensure that the
cable maintains a minimum radius curb of 4.5 cm (1 3/4 in).
Note that the cable direction can be changed during the installation. To get
around obstacles such as diagonal walls, fixed furniture, etc., fasten the cable
to the mesh in such a way that it follows the shape of the obstacle. When
there is insufficient space for the cable to return, change the direction of the
cable (picture 8).
Cables must be installed in runs lesser than 3 m (10 ft). Divide the room in
smaller sections should it exceed this dimension.
All the heating portion of the cable and the mechanical joint must be
fastened to the mesh.
Wet Environment Installation
The Green Cable Concrete can be installed in a wet environment such as a
European style shower floor, indoor pool deck (Canada only) and a sauna
with a ceramic or natural stone floor.* However, additional precautions must
be observed.
• The thermostat must be located at least 1 m (3 ft 3 in) away from the wet
zone so that it cannot be reached by a person in that area.
• The shower must have its own cable.
• The installation must be done in accordance with all other instructions
given for dry areas, such as minimum distance from the drain, not installing
the cable in the walls, etc.
* Applications must be validated with local and/or national electrical codes
Floor Probe Installation
First install the cable conduit included in the FLS1260T kit. This cable conduit
protects the probe (including the capillary) and makes its replacement easier,
should it become necessary. The cable conduit will need to go from the slab up
to the connection box. Attach this cable conduit to the one that already holds
the cold lead. Place the cable conduit in such a way that the probe capillary
(the bottom part) is at a distance of 60 cm (2 ft) within the heated zone.
Do not cross the probe cable conduit over the heating cable. Slide the probe
capillary in, using lubricant as needed, until it has reached the tip of the cable
conduit. Call our Customer Service at 1 800 353-9843 for recommendations
on lubricants. Secure the tip of the cable conduit to the mesh centered
between the heating cables. The probe should be placed in a neutral
location, not near any other heating or cooling sources.
Once the probe installation is complete, verify its integrity with an appropriate
multimeter (refer to the thermostat installation guide for more details).
6
Installation Over Plywood or OSB
Although the installation of the Green Cable Concrete is recommended
secured with tape to a wire mesh and embedded in a concrete slab as
previously stated, it is also suited for an installation over plywood or OSB
subfloor with a minimum 3.8 cm (1.5 in) topping.
• There are no gauges for the installation of this cable so it must be stapled
directly onto the plywood or OSB subfloor (picture 9).
• Staples must be at least 9/16'' long and must be suitable for 8 mm
diameter cables (picture 10). Secure the cable so the runs are evenly spaced
throughout the whole installation.
• Caution must be taken so that the stapler's mechanism does not damage
Picture 7
the cable.
• This cable is designed to be installed at a regular spacing of 10 cm (4 in) or
15 cm (6 in). Regular spacing must be maintained throughout the installation.
• Note that the installation spacing can never be less than 4 inches
(on-center).
• The cable can be installed over a diamond mesh placed over the subfloor,
if needed.
• The floor probe must be installed in a conduit.
Picture 8
Cable Verification
Once the cable installation is completed, once again verify the cable's
integrity as explained in the section "Cable Verification". Record the results on
the warranty card. Should the cable have been damaged during installation,
do not proceed with the concrete pouring. Contact FLEXTHERM Customer
Service at 1 800 353-9843.
Safe Practices during the Concrete Pour
Some precautions need to be taken in order to prevent cable damage when
pouring concrete over a wire mesh on which a heating cable has been
installed:
• Be careful with the cable when walking on the mesh. Ensure that enough
bricks or chairs were placed under the mesh to fully support traffic and
concrete weight without moving.
• Always use a concrete pump to pour the concrete. The use of a wheelbarrow
is prohibited.
• Always lay the concrete pump pipe (especially the pipe gaskets) over a
styrofoam panel reinforced with a plywood (plywood side up) to prevent
damage to the cables (picture 11).
WARNING: The Green Cable Concrete cannot be installed
under fixed objects since the heat trapped could cause the
heating cable to age prematurely.
Green Cable Concrete Installation Guide
Picture 9
Picture 10