Installation Manual

4.0 INSTALLATION FOR INDOOR SLAB HEATING
4.1 TEMPERATURE CONTROLLER & SENSOR
We recommend a standard Programmable Thermostat with a temperature sensor
specially designed for control of the Heating System.
The sensor normally comes with a 2 conductor lead wire of 15 feet (4.5m) in
length. Thermostat sensor location shall be centered between two adjacent runs of
Heating Cable within metal pipe or conduit to allow for replacement. Do not position
Thermostat sensor closer than 1.5 inch (38 mm) to Heating Cable. Sensor cable shall
be routed to the Thermostat located in the wall at suitable operating height. Do not
allow any other Heating Cable to overlap with the sensor cable.
The details of the thermostats and installation guidelines are given in
the instruction manual provided with the Thermostat.
4.2 ELECTRICAL PROVISIONS FOR THE SYSTEMS
The Heating System installation wiring shall be in accordance with the National Electric
Code and any applicable local codes. Controls and accessories recommended for
use along with the Heating Cables are listed below:
• Floor Sensing Temperature controller / Thermostat
• Relay Panel(s) for amp loads greater than 15 amps
• Dedicated Circuit Breaker(s) for all heater circuits. GFCI (5mA trip) or GFPE (30mA
trip) may be required - check local and national code.
• Plastic zip ties, 2” thick polystyrene insulation (provided by installer)
The location of the Thermostat junction box shall be about 4’ (1.2m) high from the
oor for easy access. The oor sensor wire and the Heating Cable cold leads shall be
routed to the Thermostat / power connection box in separate conduits.
If the Heating System has a load below 1,750W at 120V or 3,500W at 240V based
on thermostat power rating, it may be connected directly to an electronic thermostat
as shown in Diagram A which gives a typical scheme of the electrical system. If the
Heating System has a load more than the thermostat power rating, consult your
WarmlyYours Account Manager. (you’ll likely need a relay panel)
WARNING
In case the GFCI in our thermostat trips during normal operation, and cannot be
reset, there is likely a fault in the Cable. No attempt should be made to re-energize
the system. The GFCI must not be bypassed under any circumstances. Consult a
qualied electrician.
3
2’ (61cm)
or
3’ (91cm)
Length 5’ (152cm) min 50’ (1524cm) max
20’ (610cm) Cold Lead
Outer Sheath PVC/Pololefin
Polyester Sheath
Metal Sheath (Copper/Galvanised Steel/Cladded Steel)
Primary Insulation (Fluoropolymer)
Heating Conductor (Solid/Multistrand)
10"
(251mm)
3"
(8cm)
20’ (610cm)
Cold Lead
HEATING
CABLE
FLOOR
SENSOR WIRE
CAPPED
CONDUIT
1/4” (6mm)
Twin-conductor
Heating Cable
SLAB HEATING SYSTEM
THERMOSTAT
SNOW MELT MAT
120 VAC SUPPLY
120V / 240V VAC SUPPLY
120 VAC
or
240 VAC
RELAY
PANEL
SCV-120
CONTROL
SENSOR
HEATING
CABLE
FLOOR
SNOW MELT MAT
THERMOSTAT
P N E
2’ (61cm)
or
3’ (91cm)
Length 5’ (152cm) min 50’ (1524cm) max
20’ (610cm) Cold Lead
Outer Sheath PVC/Pololefin
Polyester Sheath
Metal Sheath (Copper/Galvanised Steel/Cladded Steel)
Primary Insulation (Fluoropolymer)
Heating Conductor (Solid/Multistrand)
10"
(251mm)
3"
(8cm)
20’ (610cm)
Cold Lead
HEATING
CABLE
FLOOR
SENSOR WIRE
SENSOR WIRE SENSOR
CONCRETE SLAB
CAPPED 3/4”
METAL CONDUIT
2-3”
SLAB
4-6”
CAPPED
CONDUIT
1/4” (6mm)
Twin-conductor
Heating Cable
HEATING SYSTEM
THERMOSTAT
SNOW MELT MAT
120 VAC SUPPLY
110V / 230V AC SUPPLY
120 VAC
or
240 VAC
RELAY
PANEL
SCV-120
CONTROL
SENSOR
HEATING
CABLE
FLOOR
SNOW MELT MAT
THERMOSTAT
P N E
T-Stat
DIAGRAM A
Probe type sensor at the
end of 15’ 2 conductor
20AWG wire.