Installation Guide

INSCT0816
10
STEP BY STEP CABLE INSTALLATION
To avoid damaging the heating cable, handle it carefully and use a reel to
unreel it (see FIGURE 13).
Make sure the circuit is not energized.
Determine the ideal location for the thermostat, in accordance with the electrical
codes effective in your area. Cut a hole in the wall for a junction box at the
desired location. At oor level, directly below the thermostat box, make a groove
in a “U” shape in the base of the wall (sole plate) to accomodate the entrance
of the power lead. Determine the length of conduit needed between the inlet
knockout of the junction box and the base of the wall (sole plate) according
to the electric codes in your area. It is unnecessary to include an elbow at
the base of the lead, unless it is required by the electric codes in your area
(see FIGURE 14). Pull the cold wire (power lead) and sensor wires through the
conduit into the thermostat junction box and leave 6 inches protruding. Position
and install the excess of cold wire on the oor (see FIGURE 14) with the help of
the oor mounting bracket and hot glue. Ensure that the cold wire installed on
the oor does not exceed the height of the oor mounting bracket. Then attach
a metal plate to the base of the wall (sole plate) to protect the electric wires in
the groove.
Make sure the cable’s factory splice is secured to the
oor. The splice must not be installed inside the wall.
Mark the splice location on the oor. With
the appropriate tool, make a groove in the
oor large enough to house the cable splice.
Once the splice is in the groove, it should be
placed at the heating cable level. (Depth to
dig can vary from 1⁄4 inch (6 mm) to 1⁄2 an
inch (6 to 13 mm) (see FIGURE 15).
Clean the oor area, put the splice in the
groove and and secure it to the oor using
hot glue.
Using the factory splice as a starting point, secure the cable to the oor in
accordance with the pre-established cable layout and the following standard
spacing (based on the wattage/square foot selection).
3 inches (76 mm) = 12 W/square foot = 129 W/m²
4 inches (102 mm) = 9 W/square foot = 97 W/m²
When reaching the half way indicator on
the cable (see FIGURE 16), evaluate
the remaining space and consider the
following possibilities:
1. If the cable is too long, the excess can
be laid in the buffer zone (see FIGURE
2). A buffer zone spacing of 2 inches
is acceptable but only for a few cable
passes (2 or 3).
2. If the cable is too short, the buffer zone
is considered as a non-heated area.
For an application using a minimal amount of cement, a cavity can be made in
the plywood in order to house the termination joint of the cable.
If more than one cable is required, plan the necessary oor space for the location
of the factory splices and follow the same
installation procedure for each cable. The
wiring of the thermostat or relay, whichever
is used, must be completed according
to the thermostat/relay manufacturer
recommendations. Make sure not to exceed
the thermostat or relay maximum allowable
wattage and/or amperage.
Install the thermostat sensor between
two cable runs, at a distance of at least
24 inches (60 cm) from the wall or centered
between walls. Choose a location where
the sensor does not cross over the heating cable once it is routed, beginning
at the base of the wall.
First, mark the sensor location on the oor and, using the appropriate tool,
make a groove in the oor large enough to house the sensor. Clean the oor
area, set the sensor in the groove and secure it to the oor using small pieces
of the mounting bracket and hot glue.
SECOND SERIES OF TESTS
Before performing the second series of tests, lay cardboard over the cable
runs to protect it until the concrete application. However, the mounting
brackets must remain visible and, thus, not be covered with cardboard in
order to prevent you from walking on the cable where it hooks onto the
mounting brackets and, therefore, damaging the cable.
As described in section REQUIRED TESTS AND WARRANTY CARD,
TESTS 1, 2 & 3, conduct the second series of tests when the cable has been
secured to the oor, preceding the pouring of the concrete. Measured values
must be recorded on your warranty card. If a break or damage is detected, the
installation should be stopped and the cable should be xed before continuing
the installation.
A repair kit is available, for details consult Stelpro’s customer service.
FIGURE 16
FIGURE 17
FIGURE 15
FIGURE 14
Put the extra
(COLD WIRE)
METAL
wire as shown
SPLICE
PLATE
CONDUIT
POWER LEAD
THERMOSTAT
SENSOR