Instructions / Assembly

IOM-ST-DIY-MAT 1515 10 of 96

STEP 2.3:

Bottom Plate Work

Drill or chisel holes at the bottom plate as indicated. One hole is for routing the power lead

conduit and the other is for the thermostat sensor. These holes should be directly below the

electrical box(es).

Power lead

conduit

Wire

Clip

Power

lead

Sensor wire

If going in to an existing wall, cut out

dry wall and chisel out bottom plate

to route wires to control.

STEP 2.4:

Install Power Lead Conduit and Thermostat Sensor

Power Lead Conduit:

The shielded power lead can be installed with or without electrical conduit (recommended

for added protection against nails or screws) depending on code requirements. Remove one

of the knock-outs in the electrical box to route the power lead. If electrical conduit is not

required by code, install a wire collar to secure the power leads where they enter the box. If

conduit is required by code, install 1/2" (minimum) conduit from the bottom plate up to the

electrical box. For multiple power leads (multiple mats) install 3/4" conduit.

Thermostat Sensor:

The SunStat control sensor can be installed with or without electrical conduit depending on

code requirements. Conduit is recommended for added protection against nails or screws. Do

not place the sensor in the same conduit as the power leads to avoid possible interference.

Open a separate knock-out in the bottom of the thermostat box. Feed the sensor (and conduit,

if used) through the knock-out, down through the cut-out in the bottom plate, and out into the

floor where the heating mat will be installed. If the sensor wire needs to be secured to the wall

stud, wait until after the mat and sensor are completely installed on the floor.

STEP 2.5:

Rough-in Wiring:

Install appropriate 12 or 14 AWG electrical wire from the circuit breaker or branch circuit source

to the SunStat control electrical box following all codes, see Table 5.