SunTouch SunStat CommandPlus Programmable Thermostat Instruction Manual

Specifications:
Power supply 120/240 VAC, 60 Hz, 3 W
Maximum load 15 A, resistive
Maximum power 1800 W at 120 VAC
3600 W at 240 VAC
GFCI Class A (5 mA trip)
Dimensions 4.73″ H x 3.11″ W x 1.9″ D (120 x 79 x 48 mm)
0.620″ D (16 mm) from wall
Type 1 or Type 2 action
and additional features Type 2.B
Rated impulse voltage 2500 V
Control pollution degree PD2
Approvals UL 943, UL/CSA 60730, UL 991
Ambient conditions 32°F to 86°F (0°C to 30°C), < 90% RH non-condensing
Floor Sensor Thermistor, 10kΩ NTC type, 300 V jacketed cable, 15 ft

WARNING:
Read this manual BEFORE using this equipment.
Failure to read and follow all safety and
use information can result in death, serious
personal injury, property damage, or damage to
the equipment.
Keep this manual for future reference.

The antenna used for this radio must be properly installed and maintained
and must provide a separation distance of at least 7.9 inches (20 cm) from
all persons.
This device complies with Part 15 of the FCC Rules and with Industry Canada
license-exempt RSS standard(s). Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this
device must accept any interference received, including interference that
may cause undesired operation.
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one of the
following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.
Consult the dealer or an experienced radio/TV technician for help.

Box Contents

SunStat® CommandPlus Wi-Fi thermostat
Floor sensor

Screwdriver
Installation manual

Machine screws (2), 6-32

Items Needed

Electrical box (must be UL listed and proper size)
– Portrait: vertical 1-gang box
– Landscape: square 2-gang box/plastic 1-gang mud ring

Conduit, flexible or rigid (if required, must be UL listed and proper size)
Electrical wiring cable (UL listed)
– Minimum 14 AWG to 12 A
– 12 AWG to 15 A

Nail plate
Hot glue gun and hot glue

Location

• Indoor location only
• Do not install where there is a draft, direct sun, hot-water
piping, ducting, or other cause for inaccurate temperature
readings
• Do not install where there is electrical interference from
equipment, appliances, or other sources
• Install away from all water sources such as sinks and at least
4 ft (1.2 m) away from showers and bathtubs
• Consider easy access for wiring, viewing, and adjusting
• Install at a suitable height, normally about 4-1/2 ft to 5 ft
(1.4 m to 1.5 m) from the floor

Important Safety Information

This is a safety-alert symbol. The safety-alert symbol
is shown alone or used with a signal word (DANGER,
WARNING, or CAUTION), a pictorial and/or a safety
message to identify hazards.

When you see this symbol alone or with a signal word on your
equipment or in this manual, be alert to the potential for death or
serious personal injury.

This pictorial alerts you to electricity,
electrocution, and shock hazards.

This symbol identifies hazards which, if not
avoided, could result in death or serious injury.

This symbol identifies practices, actions, or
failure to act, which could result in property
damage or damage to the equipment.

Installation

Installation must be performed by qualified persons, in accordance
with local codes, ANSI/NFPA 70 (NEC Article 424) and CEC Part 1
Section 62 where applicable. Prior to installation, please consult
the local codes in order to understand what is acceptable. To the
extent this information is not consistent with local codes, the local
codes should be followed. Regardless, electrical wiring is required
from a circuit breaker or other electrical circuit to the control. It
is recommended that an electrician perform these installation
steps. Please be aware local codes may require this product to
be installed by an electrician.

The following cautions must be observed:
ALWAYS install the floor sensor included with the thermostat.
NEVER put the system into full operation until the tile or flooring installer
verifies all cement materials are fully cured (typically two to four weeks
after installation).
ALWAYS use insulated copper wires rated for 90°C (194°F) and 600 V
minimum. Do not use aluminum.
ALWAYS wire all circuits as Class 1, electric light & power circuits.
ALWAYS mount the thermostat to a grounded electrical box.
ALWAYS seek help if a problem arises. If ever in doubt about the correct
installation procedure, or if the product appears to be damaged, the
factory must be contacted before proceeding with the installation.

To prevent the risk of personal injury and/or death,
make sure power is not applied to the product until
it is fully installed and ready for final testing. All work
must be done with power turned off to the circuit
being worked on.
To reduce the risk of electric shock, do not connect to a circuit
operating at more than 150 V to ground.

Power Supply

Pull power supply wiring to the control location.
• Leave about 6 to 8″ (15 to 20 cm) of wire for connections.
• This wiring should be size 12 or 14 AWG, in compliance with
local code requirements.
• A qualified person should run a dedicated circuit from
the main circuit breaker panel to the control location. If a
dedicated circuit is not possible, it is acceptable to tap into
an existing circuit. However, there must be enough capacity
to handle the load (amps) of the floor heating system being
installed, and any appliance likely to be used on the circuit
such as a hair dryer or vacuum cleaner.
• Avoid circuits that have ballasted lighting, motors,
exhaust fans, or hot tub pumps to reduce the likelihood
of interference.
• The circuit breaker should be rated 20 amps for total circuit
loads up to 15 amps. A 15-amp circuit breaker may be used
for total circuit loads up to 12 amps.
• A GFCI (ground-fault circuit interrupter) or AFCI (arc-fault
circuit interrupter) type circuit breaker may be used, but is not
necessary.

Make sure 120 VAC is supplied to 120 VAC cables and 240 VAC
is supplied to 240 VAC mat or wire. Otherwise, dangerous overheating
and a fire hazard could result. Do not exceed 15-amps
on this control.

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).

SunStat Sensor Installation

• The SunStat sensor can be installed with or without electrical
conduit depending on code requirements. Conduit is
recommended for added protection against nails and screws.
• Do not place the sensor in the same conduit as the power
leads to avoid possible interference. Open a separate knockout
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 wire or mat and sensor are completely installed
on the floor.
• 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

SunStat® R4 Relays are used when more than 15 A must be controlled
by one CommandPlus thermostat. The CommandPlus can connect
wirelessly to the R4 Relay (see Operation > Wireless Pairing). If a
wired connection is desired, follow these steps.
• Pull 18 AWG to 24 AWG 2-conductor wire from the R4 Relay
location to the CommandPlus location
• The wire may be up to 100 ft (30 m) long
• Strip the wire ends to 1⁄8″ long
• Refer to the R4 Relay manual for additional details

Home Automation System Rough-in Wiring

A short or 24 VAC applied between the AWAY and COM terminals
will switch the thermostat into ‘Away’ mode.
• Pull 18 AWG to 24 AWG 2-conductor wire from the home
automation location to the CommandPlus location
• Strip the wire ends to 1⁄8″ long

Command Plus Wiring

Before connecting the wires to the back of the thermostat, detach
the display front from the base.
While holding the base section in one hand, with the other pull
gently up holding the sides of the thermostat towards the bottom
(near RESET button), pivoting away from the base.
Remove back cover plate to expose the power terminals.

Power Wiring

• Connect the ground wire from the power supply to the
ground wire from the floor heating power lead
• If the electrical box is metal, use a short length of wire to
connect the ground wires to the bonding screw
• Connect the floor heating power lead conductors to the
LOAD 1 and LOAD 2 terminals
• For 120 VAC connections, connect the power supply
black (L) wire to the L terminal and the white (N) wire to
the N terminal
• For 240 VAC connections, connect one of the power supply
wires to the L1 terminal and the other to the L2 terminal
• Replace back cover plate to cover your connections.

Low Voltage Wiring
Sensor, R4 Relay, and Home Automation connections are made
to the terminal block by inserting the wires into the openings and
tightening the screws. Three holes are provided for wire access
from the back. Wires must be routed in the channel to the right of
the terminal block so that the display front can be re-attached. Any
low voltage wiring that passes through the inside of the electrical
box must be rated at least 90°C 300 V.
• Sensor—connect to the SENSOR terminals, not polarity sensitive
• R4 Relay—connect to RELAY and COM terminals, matching connections on the R4 Relay
• Home Automation—connect to AWAY and COM terminals, refer to home automation control instructions

Make sure the wire connections are secure by gently tugging
on them. Otherwise, arcing could occur, causing dangerous
overheating and a possible fire hazard.

Finish CommandPlus Installation

• Ensure all connections are secure
• Carefully press the wires into the electrical box
• Do not use the thermostat to push the wires
• Secure the thermostat base to the electrical box with the screws included
• Do not overtighten
• Re-attach the display front
– Line up the top edge with the base
– Rotate the bottom towards the base and snap it into position

Make sure the mortar has had time to fully cure before operating the system for more than a brief test.

Power Up
• Switch on the circuit power supply at the breaker
• The CommandPlus will load stored settings into memory
Heating Operation
By default, the CommandPlus controls the heating system to
maintain the floor temperature at the setpoint of 85°F (29°C).
Room temperature control can be selected in the Temperature
Settings. Floor and Room maximum settings are also available
to limit temperatures.
GFCI Testing and GFCI Light Operation
• Press the TEST button on the GFCI monthly to verify that it is
operational. The GFCI RESET light will flash red. To resume
normal operation, press the RESET button.
• If pressing TEST does not display a flashing red GFCI RESET
light, protection is lost, and the unit will need replacement.
• If the GFCI RESET light continues to flash after pressing
the RESET button, protection is lost, and the unit will
need replacement.
• If the GFCI trips during normal operation, press the RESET
button to resume operation. If it trips again, the floor heating
system should be inspected and tested by a qualified
electrician.
• If the GFCI TEST light stays on solid, a welded relay has
occurred, and the unit will need replacement.

Power Off

• Menu > Power > Power Off
• To resume operation, touch the display for power on option

Home/Away Settings

• Menu > Home/Away
• Home mode is normal operation
• In Away mode, the heating system is controlled to the Away temperature
• Set Floor or Room Away corresponding to Temperature

Settings Control

• Away mode is entered from the Menu, the mobile app, voice
services, or a home automation system

Temperature Settings

• Menu > Settings > Temperature
• Floor and Room Max are used to protect temperature sensitive
flooring or prevent space overheating
• “MAX” displays when the floor or room has reached its
maximum allowed temperature
• Control determines whether the floor or room temperature will
be controlled
• Weather Compensation adjusts heating operation to
compensate for changing weather conditions
• Warm Weather Shut Down saves energy by turning off the
heating system when the outdoor temperature is above
the setting
• Floor and Room Offsets allow for corrections to the sensor readings

Services

• Menu > Settings > Services & Voice
• Weather uses the ZIP/Postal Code to get local weather data
• Watts Home registers the device to the mobile app

Display Settings

• Menu > Settings
• Select Language, Orientation, screen Brightness and Timeout
• If the Schedule is enabled, set screen Brightness for Wake/
Return and Leave/Sleep
• If enabled, the Night Light will keep the screen on from dusk
to dawn
• Clean Screen allows the screen to be cleaned without
affecting operation

Schedule

• Menu > Schedule
• The default schedule has a Weekdays program and a
Weekends program (the default is Schedule Off)
• To edit the time or temperature for a Wake, Leave, Return,
or Sleep event select the day group
• To create a new schedule, select Change Days
• Smart Start will begin heating the floor early to meet the
scheduled temperature on time

Notifications

• Firmware Update
New firmware is available for the device
• Ground Fault
A ground fault has been detected
• Welded Relay
The device must be replaced
• Voltage Error
The line voltage does not match the heating mat/cable
• Floor Sensor Error
The floor sensor is disconnected or needs to be replaced
• Memory Error
Programming may be lost—verify all settings
Remote Access Setup
• Download the Watts® Home mobile app from the Apple
App Store or Google Play
• Create an account and/or sign in
• On a Location page, select Add New Device
• On the CommandPlus, get a registration code either from
the guided setup or from Menu > Settings > Services &
Voice > Watts Home
• Enter the registration code on the mobile app, name your
device, and save
• To disable mobile access, go to Menu > Settings >
Services & Voice > Watts Home

Before first using the Wi-Fi features of this product, you must accept the Terms of Use, as amended from time to time and available
at https://www.watts.com/terms-of-use. If you do not accept these terms, this product can still be used without Wi-Fi features.

Troubleshooting Guide
It is strongly recommended that a qualified, licensed electrician install the heating cables and related electrical components. If problems
with the system arise, please consult the troubleshooting guide below.

Any electrical troubleshooting work should be performed with the power removed from the circuit, unless otherwise noted.

Problem	Possible Cause	Solution
Wi-Fi connected but weather info missing	Unknown location	Enter ZIP/Postal Code Menu > Settings > Services & Voice > Weather
Heating (orange setpoint screen), but floors do not feel warm	Setpoint too low to feel warm to the touch	Increase the setpoint
	Faulty wiring	Have the sensor and power lead wiring checked by a certified electrician
Display is off	Thermostat in off mode	To resume operation, touch the display for power on option
	Power off at the breaker	Check the breaker or fuse in the electrical panel supplying power to the thermostat
	Faulty Wiring	Have the power supply wiring checked by a certified electrician
Heat is on before the scheduled time	Smart Start feature enabled	Floor heating will begin early to meet the scheduled temperature on time
Memory Error	Thermostat cannot read its settings	Verify all settings or reload factory defaults Menu > Settings > Reset > Factory Reset
Floor Sensor Error	Faulty sensor or wiring	Have the sensor resistance and wiring checked by a certified electrician
		Replace wired sensor
		Pair CommandPlus Smart Sensor and accept to use as floor temperature

Limited 3 Year Warranty

SunTouch warrants this control (the product) to be free from defect in material and workmanship for a period of (3) years from the date of original purchase from authorized dealers. During this period, SunTouch will replace the product or refund the original cost of the product at SunTouch’s option, without charge, if the product is proven defective in normal use. Please return the control to your distributor to begin the warranty process.

This limited warranty does not cover shipping costs. Nor does it cover a product subjected to misuse or accidental damage. This warranty does not cover the cost of installation, diagnosis, removal or reinstallation, or any material costs or loss of use.

This limited warranty is in lieu of all other warranties, obligations, or liabilities expressed or implied by the company. In no event shall SunTouch be liable for consequential or incidental damages resulting from installation of this product. Some states or provinces do not allow limitations on how long an implied warranty lasts, or the exclusion or limitation of incidental or consequential damages, so the above exclusions or limitations may not apply to you. This warranty gives you specific legal rights and you may also have other rights that vary from state to state.

SunTouch Customer Support

USA Toll-free: 888-432-8932

Canada Toll-free: 888-208-8927

Latin America Tel: (52) 81-1001-8600

SunTouch.com

Documents / Resources

SunTouch SunStat CommandPlus Programmable Thermostat [pdf] Instruction Manual
SunStat CommandPlus Programmable Thermostat, CommandPlus Programmable Thermostat, Programmable Thermostat, Thermostat

References

User Manual

SunStat CommandPlus Programmable Thermostat

SunStat® CommandPlus™

Installation and Operation Manual

SunTouch® Model# 500950-SB/BB/WB/PB