Install Instructions

IOM-WR-WW 1616 10 of 36

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 cables) install 3/4" conduit.

SunStat Thermostat Sensor:

The SunStat 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 cable will be installed. If the sensor wire needs to be secured

to the wall stud, wait until after the cable 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 Thermostat electrical box (and SunStat Relay box(es) if needed)

following all codes, see Table 5.

If SunStat Relay(s) are used, feed appropriate wire (see SunStat Relay installation manual

for size and type) between the SunStat Relay(s) and the SunStat thermostat.

See SunStat Relay instructions for details of wire size and type.