SunStat® ConnectPlus™ Installation and Operation Manual

Features:

• Floor or air-sensing temperature control
• Remote access via Watts Home mobile app
• Compatible with Voice commands
• Large touchscreen display
• Easy-to-use scheduling
• Weather/Clock display options
• Portrait/Landscape display
• Guided setup
• Comprehensive help screens
• Energy use monitoring
• Overcurrent and Voltage-level sensing
• Floor Sensor Included
• Wired or Wireless connection to SunStat® R4 Relay (sold separately)
• Wireless connection to ConnectPlus™™™ Smart Sensor (sold separately)
• 3 Year warranty

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
• Approvals: CULUS LISTED, 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
• Model#: 1139-01, 1139-02, 1139-03, 1139-04
• SunTouch Model#: 500900-SB/BB/WB/PB

Important Safety Information

This is a safety-alert symbol. Be alert to the potential for death or serious personal injury when you see this symbol.

This pictorial alerts you to electricity, electrocution, and shock hazards. WARNING: This symbol identifies hazards which, if not avoided, could result in death or serious injury.

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

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.

FCC Compliance: This equipment generates uses and can radiate radio frequency energy. If not installed and used in accordance with instructions, it may cause harmful interference to radio communications. If interference occurs, try to correct it by reorienting the antenna, increasing separation, connecting to a different outlet, or consulting a dealer/technician.

Antenna Separation: The antenna must be properly installed and maintained, providing a separation distance of at least 7.9 inches (20 cm) from all persons.

Installation

WARNING: Installation must be performed by qualified persons in accordance with local codes and relevant standards. Prior to installation, consult local codes. Electrical wiring is required from a circuit breaker to the control. It is recommended that an electrician perform these steps.

Cautions to observe:

• ALWAYS install the included floor sensor.
• NEVER put the system into full operation until cement materials are fully cured (typically 2-4 weeks).
• 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. Contact the factory if in doubt or if the product appears damaged.

WARNING: To prevent the risk of personal injury and/or death, make sure power is not applied until the product is fully installed and ready for final testing. All work must be done with power turned OFF.

WARNING: 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, leaving 6-8" (15-20 cm) of wire for connections. Wiring should be 12 or 14 AWG, compliant with local code. A qualified person should run a dedicated circuit. If not possible, tap into an existing circuit with sufficient capacity. Avoid circuits with ballasted lighting, motors, or exhaust fans to reduce interference. The circuit breaker should be rated 20 amps for total circuit loads up to 15 amps, or 15 amps for loads up to 12 amps. A GFCI or AFCI breaker may be used but is not necessary.

WARNING: Make sure 120 VAC is supplied to 120 VAC cables and 240 VAC to 240 VAC mats or wires. Otherwise, dangerous overheating and fire hazard could result. Do not exceed 15 amps on this control.

Bottom Plate Work

Drill or chisel holes at the bottom plate for routing the power lead conduit and the thermostat sensor, directly below the electrical box(es).

Diagram showing bottom plate work with conduit and sensor wire routing.

SunStat Sensor Installation

The sensor can be installed with or without electrical conduit (recommended for protection). Do not place the sensor in the same conduit as power leads to avoid 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 bottom plate, and into the floor.

If the sensor wire needs securing, wait until after installation. At the sensor location, measure at least 1' into the heated area and mark where the sensor will be attached, ensuring it is placed exactly between two heating wires and the wire does not cross any heating wires. Do not locate the sensor outside the heated area, in a gap wider than the floor, or where direct sun, hot-water piping, heat duct, or lighting below will cause inaccurate readings. Do not place an insulating item like a rug over the sensor.

To prevent the sensor tip from creating a high spot, chisel a channel into the floor and lay the sensor tip into it. Hot glue the tip in place. Do not cut the sensor wire or remove the black cable protector. Strip wire ends to 1/8".

Floor Heating Mat or Cable Power Lead Installation

The shielded power lead can be installed with or without electrical conduit (recommended). Remove one of the knock-outs in the electrical box to route the power lead. If conduit is not required, install a wire collar. If conduit is required, install 1/2" (minimum) conduit from the bottom plate to the electrical box. For multiple power leads, install 3/4" conduit. Secure a steel nail plate over the cutout in the bottom plate to protect wires against baseboard nails.

SunStat Relay Rough-in Wiring

SunStat® R4 Relays are used when more than 15 A must be controlled. The ConnectPlus can connect wirelessly to the R4 Relay. For a wired connection, pull 18 AWG to 24 AWG 2-conductor wire from the R4 Relay location to the ConnectPlus location (wire may be up to 100 ft long). Strip wire ends to 1/8". Refer to the R4 Relay manual for 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 ConnectPlus location. Strip wire ends to 1/8".

Second Stage Rough-in Wiring

The ConnectPlus provides a dry contact output, rated at 30 VAC, 1 A, for second stage heat activation when room temperature dwells below the setpoint (Room control mode only). Pull 18 AWG to 24 AWG 2-conductor wire from the second stage control location to the ConnectPlus location. Strip wire ends to 1/8".

ConnectPlus Wiring

Before connecting wires, detach the display front from the base by gently pulling upwards on the sides of the thermostat towards the bottom (near RESET button), pivoting away from the base.

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 wire to connect grounds to the bonding screw.
• Connect the floor heating power lead conductors to the LOAD 1 and LOAD 2 terminals.
• For 120 VAC: connect power supply black (L) wire to L terminal, white (N) wire to N terminal.
• For 240 VAC: connect one power supply wire to L1 terminal, the other to L2 terminal.

Diagram showing power wiring connections.

Low Voltage Wiring

Sensor, R4 Relay, Home Automation, and Second Stage connections are made to the terminal block. Insert wires into openings and tighten screws. Route wires in the channel to the right of the terminal block so the display front can be re-attached. Low voltage wiring passing through the electrical box must be rated at least 90°C 300 V.

• Sensor: Connect to SENSOR terminals (not polarity sensitive).
• R4 Relay: Connect to RELAY and COM terminals, matching R4 Relay connections.
• Home Automation: Connect to AWAY and COM terminals; refer to home automation control instructions.
• Second Stage: Connect to W2 terminals; refer to second stage control instructions.

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

Finish ConnectPlus Installation

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

See over for operation details.

Operation

Power Up

Switch on the circuit power supply at the breaker. The ConnectPlus will load stored settings into memory.

Heating Operation

By default, the ConnectPlus controls the heating system to maintain the floor temperature at the setpoint of 85°F (29°C). Room temperature control can be selected in 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 operation. The GFCI RESET light will flash red. Press the RESET button to resume normal operation.
• If pressing TEST does not display a flashing red GFCI RESET light, protection is lost, and the unit needs replacement.
• If the GFCI RESET light continues to flash after pressing RESET, protection is lost, and the unit needs replacement.
• If the GFCI trips during normal operation, press RESET. 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 needs replacement.

Power Off

Navigate to Menu > Power > Power Off. To resume operation, touch the display for the power on option.

Home/Away Settings

Navigate to 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. Away mode can be entered from the Menu, the mobile app, voice services, or a home automation system.

Temperature Settings

Navigate to Menu > Settings > Temperature. Floor and Room Max settings protect temperature-sensitive flooring or prevent space overheating. “MAX” displays when the floor or room has reached its maximum allowed temperature. Control determines whether floor or room temperature is controlled. Weather Compensation adjusts heating operation for changing weather. 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 sensor readings.

Services & Voice Settings

Navigate to Menu > Settings > Services & Voice. Weather uses the ZIP/Postal Code for local weather data. Watts Home registers the device to the mobile app. See Voice Control for setup information.

Display Settings

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

Pair Devices Settings

Navigate to Menu > Settings > Pair Devices. Press and hold the RESET button on the R4 Relay for 3 seconds. Press and hold the button on the ConnectPlus Smart Sensor for 3 seconds. The number of paired devices is shown (limit of 6 paired devices). Any mix of SunStat® R4 Relays and ConnectPlus Smart Sensors is allowed.

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

Before first using Wi-Fi features, you must accept the Terms of Use at https://www.watts.com/terms-of-use. If not accepted, Wi-Fi features will not be available.

Touchscreen Operation

Tap the screen to change the display between Floor temperature, Room temperature, Weather info, Date, and Clock.

Notes:

• “MAX” indicates floor or room has reached its maximum allowed temperature.
• “+” indicates Second Stage is active.

Wi-Fi Status: Tap to access settings.

Menu: Tap to open.

Chevrons: Tap to adjust the setpoint.

Swipe left/right to change the Home Screen Setpoint/Weather/Clock. Tap pin on Weather/Clock to pin as the Home Screen on screen wakeup.

Schedule

Navigate to Menu > Schedule. The default schedule has a Weekdays program and a Weekends program (default is Schedule Off). To edit time or temperature for Wake, Leave, Return, or Sleep events, 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.
• Ground Fault: A ground fault has been detected.
• Welded Relay: The device must be replaced.
• Over Current Error: The current limits of the device have been exceeded.
• Voltage Error: The line voltage does not match the heating mat/cable.
• Floor Sensor Error: The floor sensor is disconnected or needs replacement.
• Memory Error: Programming may be lost—verify all settings.
• Water Leak: The ConnectPlus Smart Sensor has detected moisture.
• Low Battery/Sensor Lost: Replace batteries in the ConnectPlus Smart Sensor.

Remote Access Setup

Download the Watts® Home mobile app from the Apple App Store or Google Play. Create an account or sign in. On a Location page, select Add New Device. On the ConnectPlus, get a registration code from guided setup or Menu > Settings > Services & Voice > Watts Home. Enter the code in the mobile app, name your device, and save. To disable mobile access, go to Menu > Settings > Services & Voice > Watts Home.

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.

Limited 3 Year Warranty

SunTouch warrants this control to be free from defect in material and workmanship for (3) years from the date of original purchase from authorized dealers. SunTouch will replace or refund the product at SunTouch’s option, without charge, if proven defective in normal use. Return the control to your distributor to begin the warranty process. This warranty does not cover shipping costs, misuse, accidental damage, installation, diagnosis, removal, reinstallation, or material costs/loss of use. This warranty is in lieu of all other warranties. SunTouch shall not be liable for consequential or incidental damages. Some states/provinces may not allow limitations on implied warranties or incidental/consequential damages, so exclusions may not apply. This warranty gives you specific legal rights, and you may have other rights that vary by 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

©2021 Watts