Installation Manual

2.0 SELECTION OF THE HEATING SYSTEM
Selection of your Heating System will depend on the application. The following can
be taken as a general guide:
INSTALL CHART
Application
Watts per Sq.Ft. (per Sq.M.)
- Cable spacing inches (mm)
Multiplier at
given spacing
Indoor Slab Heating
20 W/ft2 (161 to 215 W/m2)
Recommended spacing 3” to 3.5” (76
to 89mm).
4 at 3” (76mm)
3.5 at 3.5” (89mm)
3 at 4” (102mm)
2.4 at 5” (127mm)
Formula: Area of Application x Multiplier at given cable spacing = Heated Cable
Length required
Example 1 (English): 100 sq.ft of Slab Heating x 4.0 at 3” spacing = 400 feet of
Heated Cable required
Example 2 (Metric): 9.3 sq.m of Slab Heating x 4.0 at 76mm spacing = 122m of
Heated Cable required
Note: For normal plain bare slabs, stained or stamped use 3” spacing. For
application when the slab also has a oor covering like tile or wood, use 5” spacing
for a maximum of 15w/sq ft. to meet code requirements.
Please note the above-indicated values are meant as a general guide. Your values
may vary depending on a number of factors. Please consult your Account Manager
for assistance.
3.0 IMPORTANT INSTRUCTIONS BEFORE INSTALLING THE SYSTEM
1. Heating Cable must not cross or
overlap itself at any point. Do not
install cable runs any closer than 3”
on center. This could cause the Cable
to overheat, requiring replacement.
2. The Heating Cable length should not
be cut or altered under any circumstances. This may cause over heating resulting in
damage to the Cable.
3. All heated portion (blue) and factory splice must end up buried completely in the
concrete. Ensure none of the heated portion (blue) or the splice (look for heatshrink)
enter into any conduit.
4. The cold lead can be cut /extended with a conventional splice, inside of an
accessible junction box (weatherproof if outdoors).
5. Take precautions to avoid damage to Heating Cable during installation. Do not drive
over cable. Duct tape the ends of shovels. Do NOT saw expansion joints, without
having lines marked o clearly with spray paint, where installer has veried that
Heating Cables will not be cut. Do NOT damage Cables with heavy equipment,
machinery or vehicles.
6. Heating Cables should be separated from other heat sources such as luminaries,
and replaces.
7. Do not install the Heating Cable below 5˚ F (-15˚ C) ambient temperature.
8. Minimum bending radius of the Heating Cable shall not be less than 10 times its
diameter.
9. Minimum spacing of Cables is 3” (76 mm) and maximum spacing of Cables is 5”
(127mm).
10. Twin Conductor Heating Cable has a ground braid (metal sheath) to be connected
to ground and 2 conductors which are to be connected to the power supply.
11. Double check the voltage and wattage of the Heating Cable received against
the project specications on your custom installation plan. These are marked on
the CSA label of the product. A qualied electrician should connect the Heating
System.
12. Check the conductor, resistance and insulation resistance of the Heating Cable
before installing and also after installing. Resistance value should match the value
shown in Appendix A and Appendix B. A tolerance of -5% to +10% is allowed.
Insulation resistance must be innite (500 VDC megger meter required to test).
13. Keep high voltage power wires in a separate conduit from the low voltage sensor
wire.
14. Allow sucient drying or curing period of the slab after installing the Heating
System before energizing the Heating System. (7 day minimum)
15. For easy reference, x a label at the power distribution board indicating the
location of the heating units installed.
WARNING
16. The Cable must NOT be shortened or cut in any manner or subjected to strain at
the factory splice joint.
17. NEVER power up Heating Cables prior to being buried in concrete, (even for
testing purposes). This will prevent premature failure of the Heating Cable.
2
2.5” in (6.3cm) maximum
thickness brick or concrete
paver
1.5” sand, stone
dust or mortar
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
Level of
heating
cable
2” (5 cm)
3” (7.6 cm)
8”-12” crushed
rock aggregate
Right
hot/cold joints 3
in (7.6 cm) apart
and 6 in (15 cm)
from slab edge
Wrong
hot/cold joints
installed on
slab edge
Wrong
hot/cold joints
bunched
concrete wall
Junction box mounted on
inside wall
Control joint
Concrete
Heating cable secured
to rebar with plastic tie
wraps
Steel bar
3”
3”
Cable identification tag
(within 3 in (7.5cm) of NPT
connector)
Cold lead
Conduit
Expansion joint
Heated Slab
Conduit
Hot/Cold
joint
Heating
cable
Cold leads protected with 1-1/2in (3.8cm)
minimum nonmetallic conduit
where they emerge from slab
Topping 2 in (5.0 cm)
minimum, to 3 in (7.5 cm)
maximum thickness
Dimension B must not
exceed 6 in (15 cm)
Dimension A must not
exceed 3 in (7.5 cm)
If dimension C exceeds 3
in(10 cm) an additional run
of cable must be used
Pavers - No lip overhang
B
Splice
Lip edge rounded off to
prevent cable damage
1.2 in (1.3 cm) wide steel
prepunched strapping
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
Cable must be at least 4 in
(10 cm) from edge
C
A
2.5” in (6.3cm) maximum
thickness brick or concrete
paver
1.5” sand, stone
dust or mortar
Plastic tie wrap
4 in (10) or 6 in (15) square 10
gauge wire mesh
Level of
heating
cable
2” (5 cm)
3” (7.6 cm)
8”-12” crushed
rock aggregate
Right
hot/cold joints 3
in (7.6 cm) apart
and 6 in (15 cm)
from slab edge
Wrong
hot/cold joints
installed on
slab edge
Wrong
hot/cold joints
bunched
concrete wall
Junction box mounted on
inside wall
Control joint
Concrete
Heating cable secured
to rebar with plastic tie
wraps
Steel bar
3”
3”
Cable identification tag
(within 3 in (7.5cm) of NPT
connector)
Cold lead
Conduit
Expansion joint
Heated Slab
Conduit
Hot/Cold
joint
Heating
cable
Cold leads protected with 1-1/2in (3.8cm)
minimum nonmetallic conduit
where they emerge from slab
Topping 2 in (5.0 cm)
minimum, to 3 in (7.5 cm)
maximum thickness
Dimension B must not
exceed 6 in (15 cm)
Dimension A must not
exceed 3 in (7.5 cm)
If dimension C exceeds 3
in(10 cm) an additional run
of cable must be used
Pavers - No lip overhang
B
Splice
Lip edge rounded off to
prevent cable damage
1.2 in (1.3 cm) wide steel
prepunched strapping
Wrong
cold joints
unche
Wrong
cold joints
stalle
slab
Cable must be at least 4 in
(10 cm) from rail post
Cable must be at least 4 in
(10 cm) from edge
C
A