At the sensor location, measure at least 1′ into the heated area. Mark the spot where the sensor will be attached
to the floor. Be sure to place the sensor exactly between two of the heating wires. Ensure the sensor wire does
not cross over any heating wires.
Do not locate the sensor outside the heating area or in a gap between heating wires that is wider than the rest
of the floor. Do not locate the sensor where direct sun, hot-water piping, heat duct, or lighting below will cause
inaccurate temperature reading. Do not locate the sensor where an insulating item such as a rug is likely to be
placed.
To make sure the sensor tip does not create a high spot in the floor, it may be necessary to chisel a channel
into the floor and lay the sensor tip into the channel. Hot glue the tip into place.
Do not cut the sensor wire or remove the black cable protector. Strip the wire ends to 1/8″ long.
Floor Heating Mat or Cable Power Lead Installation
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.
Secure a steel nail plate over the cutout in the bottom plate to protect the wires against baseboard nails later.
SunStat Relay Rough-in Wiring
A SunStat Relay C3 is used when more than 15 amps must be controlled by one SunStat thermostat. The SunStat
Command is only compatible with the SunStat Relay C3. Do not use other models.
Pull 18 AWG to 24 AWG 2-conductor shielded wire from the relay location to this control location. The wire may
be up to 100′ (30 m) long.
Strip the wire ends to 1/8″ long. Refer to the instructions provided with the SunStat Relay C3 for additional
details.
Home Automation System Rough-in Wiring
A short or 24 VAC applied between the Away and Com terminal will switch the thermostat between the ‘Away’
temperature and regular operation.
Pull 18 AWG to 24 AWG 2-conductor shielded wire from the home automation control to this control location.
Strip the wire ends to 1/8″ long.
Thermostat Wiring
Before connecting the wires to the back of the thermostat, detach the display front from the base.
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