tekmar 079 Slab Sensor - Manual (Page 2)

© 2007 D 079 - 05/07 2 of 4
Splices under the floor covering should be avoided to ensure trouble free operation.
A groove 3/16” (5 mm) wide by 3/16” (5 mm) deep by 1-3/4” (45 mm) long should be
cut to accommodate the sensor. The sensor should be located mid way between the
heating elements to ensure a proper temperature reading.
NOTE: If it is not practical to cut a groove in the surface covering, follow the installation
method used for thin floor coverings.
Retrofit Installations
Tile Floor Coverings
If a Slab Sensor 079 is to be installed into an
existing tile floor with sufficiently large grout
lines, the sensor and wire can be installed in
one of the grout lines between the tiles. Select
a low traffic area of the floor that is mid way
between the heating elements for the sensor
location. Ensure that the sensor is located in
such a position that the attached wire is able
to reach to a suitable junction location. Splices
within the grout should be avoided to ensure
trouble free operation. Remove the appropriate
grout line and place the sensor and wire in the
floor. Re-grout the area.
Installing the Sensor to the
Bottom of a Subfloor
If the sensor is to be installed to the bottom of
a subfloor, cut a piece of 1” (25 mm) thick rigid
insulation into a 6” (150 mm) by 6” (150 mm)
square. A groove 3/16” (5 mm) wide by 3/16”
(5 mm) deep by 1-3/4” (45 mm) long should
be cut into the insulation to accommodate the
sensor. Place the sensor in the groove and
sandwich the sensor between the insulation and
the subfloor. Use a suitable fastening method
to affix the insulation to the subfloor.
Tiles
Thin-set
Subfloor
Subfloor
STEP TWO
WIRING AND TESTING THE SENSOR
Caution: Do not run sensor wires parallel to telephone or power cables. If the sensor wires
are located in an area with strong sources of electromagnetic interference, shielded cable
or twisted pair should be used or the wires can be run in a grounded metal conduit.
The Slab Sensor 079 is supplied with 10’ (3 m) of cable. If a longer length is required, 24
AWG or larger wire can be spliced onto the two wires from the sensor. The splices should
be properly soldered and protected in an accessible junction box. Follow the sensor testing
instructions given in this brochure and then connect the wires to the control.