Owner’s Manual Programmable SunStat Control 500670-SB

By SunTouch® A division of Watts Water Technologies, Inc.

Model 500670 Dual Voltage – 120/140 VAC

Owner’s Manual

Your new SunStat Pro thermostat 500670-SB is designed to control the voltage to
either a 120VAC or 240VAC resistive floor warming system.

Please follow this manual for complete installation and operation instructions.
If you have any questions or comments, try calling Technical Support at
1-877-880-8453 (TILE).

Make sure you are qualified and are familiar with house wiring.

This is a line voltage device that could cause serious injury or damage if improperly

installed.

Dimensions

Face Size	Overall Size
Width : 2 7/8″	Width : 2 7/8″
Height : 4 9/16″	Height : 4 9/16″
Depth : 13/16″	Depth : 1 3/4″

1. Preparation

1. Unpack your thermostat and make sure everything is in good condition:

• Thermostat

• Floor sensor

• Small screwdriver

• Mounting screws

• Wire nuts for wiring connections, If any parts are missing or damaged, contact the store where you purchased this thermostat. Do not install a damaged part.

Many people believe the extra cost can quickly be recovered in energy savings by using this electric radiant floor heat control.

2. Gather the following tools and supplies:

• Phillips screwdriver, hole saw

• Wire strippers, “fish tape”, other electrical tools

• Electrical box for thermostat:

A. If you are connecting to power leads from only 1 or 2 floor warming systems, you may use a single-gang, 31⁄2 inch deep box.

B. If you are connecting to power leads from 3 floor warming systems, use a 4x4x21⁄8 inch or deeper box (not a 2-gang box) when your wall studs are still exposed. Install a single-gang “mud-ring” cover on the box before installing drywall materials.

C. For more than 3 floor warming systems or other layouts, you may need to install a junction box to connect the power leads together.

Then use house wire to connect between the junction box and the thermostat electrical box.

See the installation instructions for your floor warming system for more information.

ALWAYS: Wire all circuits as Class 1, Electric Light and Power Circuits.

ALWAYS: Wire all circuits with insulation rated 600V minimum.

ALWAYS: Mount this control only to a grounded metallic box or a nonmetallic box.

ALWAYS: Use power supply wires suitable for at least 90°C.

CAUTION: High voltage – disconnect power supply before servicing.

2. Installation

Remove the Thermostat Face

1. Remove the thermostat Front Module
from the Power Module by opening the door
and loosening the screw.

2. Pull outward near the bottom on the
Front Module and lift off.

Prepare the Wiring

1. Find a location for your thermostat. It

is suitable for indoor use only, on insulated or uninsulated walls. Locate it about 4 1/2 feet to 5 feet above the floor on an inside wall. Avoid placing it near other heat sources such as hot-water piping, heat duct, wall-mount lighting, and direct sunlight to help prevent adversely affecting the thermostat.

2. Turn off the power to the floor warming system at the main circuit panel before doing any electrical work.

3. A qualified electrician should run a dedicated circuit from the main circuit panel to the thermostat location.

4. If a dedicated circuit is not possible, you may tap from another circuit in the room. Make sure there is enough load capacity (amps) to handle the addition of your floor warming system, and that it is NOT wired in series with any other device, including other GFCIs.

5. The circuit breaker in the main circuit panel should be 15 amps maximum for a floor warming system totaling 12 amps or less. For larger systems up to 15 amps, use a 20 amp maximum circuit breaker. Never exceed 15 amps on this thermostat.

6. Pull the power supply wiring into this box, leaving about 6 inches of wire.

7. Pull the floor sensor wire and the power lead wires from your floor warming system up the wall, into this box. Refer to your floor warming system installation instructions for placement of the floor sensor tip into the floor area.

8. Mount the electrical box.

Connect Wires

1. Match and connect the two wires marked “LINE1” and “LINE2” to the power supply wires using the wire nuts provided.

2. Gently tug on the wires to make sure they are secure, otherwise a wire could loosen and cause failure.

3. Overwrap the wire nuts with electrical tape to better secure them to the wires.

4. Match and connect the two wires marked “LOAD1” and “LOAD2” to the floor warming system lead wires and secure these wires the same way.

5. Connect the house ground wire to the green lead wire(s) of your floor warming system.

6. Insert the ends of the floor sensor wire into the “SENSOR” terminals (1 and 2) and tighten the screws. There is no polarity, so it does not matter which wire end goes into which terminal.

Remote Control

1. If you want to connect your thermostat to a remote control device, such as a home automation system, first make sure that the remote device has a “dry contact” output (an un-energized switch, such as the contacts on a relay). Many home automation systems come with such an output that opens or closes at specified times.

2. Pull 2-conductor wire, size 18- to 24-gage, through the wall from the remote device, into this electrical box.

3. Connect the wire ends into the “SETBACK” terminals (5 and 6) and tighten the screws (no polarity).

SunStat Relays

1. If you want to use your thermostat to drive a SunStat Relay(s) (ask us about this convenient way to control larger systems with one thermostat), first read and follow the instructions for the SunStat Relay thoroughly.

2. Pull 2-conductor wire, size 18- to 24-gage, through the wall from the SunStat Relay, into this electrical box.

3. Connect the wire ends into the “RELOUT” terminals (3 and 4) and tighten the screws (no polarity)..

Mount the Thermostat

1. Carefully fold and press the wires back into the electrical box. Do not use the thermostat to push them in, as this may cause connections to loosen and possible failure.

2. Secure the thermostat Power Module into the box with the mounting screws provided.

3. Carefully snap the Front Module onto the Power Module.

4. Tighten the screw.

5. Switch on the power at the main circuit panel.

NOTE to contractors: After installing the thermostat, be sure to:

a. Do a Quick Setup (section 3),

b. Temporarily override the setpoint temperature to make sure it is heating for a few minutes (section 5),

c. Test the GFCI (section 5).

3. Quick Setup

On/Off Switch

Your thermostat should be turned off when it is first installed. The display will show OFF and the time and day.

1. Slide the on/off switch to the upper position, turning the thermostat on. The display will show the time and day, temperatures, and other information.

2. To turn the thermostat off anytime, slide the on/off switch to the lower position. No heating will occur and all programming is retained.

Change Format Between °F / 12-hour and °C / 24-hour

Your thermostat is factory set to operate in either °F / 12 hour format or °C / 24 hour (military time) format. If needed, you may change this at any time as follows:

1. Press the OPTIONS button and hold for 1 second. An °F and 12h will show on the display.

2. Press the down or up button to toggle to °C and 24h.

3. Press the HOLD/RETURN button to return to the normal operating mode.

Set the Current Time and Day

1. Press the DAY/TIME button and hold for 1 second. The hour should be blinking.

2. Press the down or up button to adjust the hour.

3. Press the DAY/TIME button briefly. The minutes should be blinking.

4. Press the down or up button to adjust the minutes.

5. Press the DAY/TIME button briefly. The day should be blinking.

6. Press the down or up button to adjust the day.

7. Press the HOLD/RETURN button or wait 15 seconds and the thermostat will return to the normal operating mode, saving your settings.

Use the Factory Programmed “User” Schedule

If you want to begin using your thermostat now without making any changes to the factory set programming schedule, you may skip to section “5 Operation”.

It will operate in the “User” Schedule (U1), pre-programmed as follows, and can be customized later to your needs (see section “4 Additional Setups”):

U1 (User changeable)

Cycle	Mon – Fri	Saturday	Sunday
1	6:00 am 82 F	6:00 am 82 F	6:00 am 82 F
2	8:00 am 75 F	8:00 am 75 F	8:00 am 75 F
3	5:00 pm 82 F	5:00 pm 82 F	5:00 pm 82 F
4	10:00 pm 75 F	10:00 pm 75 F	10:00 pm 75 F

4. Additional Setups

Change the Program Schedule

Your thermostat is factory set with a “User” program schedule (U1), and four convenient “Pre-set” schedules (P1, P2, P3, and P4).

If you are not satisfied with the “User” schedule, you may select one of the “Pre-set” schedules or modify the “User” schedule as follows:

“Pre-set” schedule

1. Press the PROGRAM button and hold for 1 second. Pro and U1, P1, P2, P3, or P4 will show on the display.

2. Press the down or up button briefly to select P1, P2, P3, or P4. These schedules are not able to be modified, and are as follows:

P1 (Early riser)

Cycle	Mon – Fri	Saturday	Sunday
1	5:00 am 82 F	5:00 am 82 F	5:00 am 82 F
2	7:00 am 75 F	9:00 am 75 F	9:00 am 75 F
3	5:00 pm 82 F	5:00 pm 82 F	5:00 pm 82 F
4	10:00 pm 75 F	10:00 pm 75 F	10:00 pm 75 F

P2 (Longer day)

Cycle	Mon – Fri	Saturday	Sunday
1	5:00 am 82 F	6:00 am 82 F	6:00 am 82 F
2	8:00 am 75 F	9:00 am 75 F	9:00 am 75 F
3	6:00 pm 82 F	5:00 pm 82 F	5:00 pm 82 F
4	11:00 pm 75 F	11:00 pm 75 F	11:00 pm 75 F

P3 (At home during the day)

Cycle	Mon – Fri	Saturday	Sunday
1	6:00 am 82 F	6:00 am 82 F	6:00 am 82 F
2	8:00 am 79 F	9:00 am 79 F	9:00 am 79 F
3	6:00 pm 82 F	6:00 pm 82 F	6:00 pm 82 F
4	10:00 pm 75 F	10:00 pm 75 F	10:00 pm 75 F

P4 (Take the chill off)

Cycle	Mon – Fri	Saturday	Sunday
1	6:00 am 75 F	7:00 am 75 F	7:00 am 75 F
2	9:00 am 70 F	10:00 am 70 F	10:00 am 70 F
3	6:00 pm 75 F	6:00 pm 75 F	6:00 pm 75 F
4	10:00 pm 70 F	10:00 pm 70 F	10:00 pm 70 F

3. Press the HOLD/RETURN button or wait 15 seconds and the thermostat will return to the normal operating mode, saving your selection.

The thermostat will now display a P1, P2, P3, or P4 at the bottom right.)

If you want to customize a schedule to your own needs, select the “User” schedule and begin modifying it as follows:

“User” schedule

1. Press the PROGRAM button and hold for 1 second. Pro and U1, P1, P2, P3, or P4 will show on the display.

2. Press the down or up button to select U1.

3. Press the PROGRAM button briefly. CYCLE 1 and MO through FR will show on the display. The hour should be blinking.

4. Press the down or up button to adjust the hour.

5. Press the PROGRAM button briefly. The minutes should be blinking.

6. Press the down or up button to adjust the minutes.

7. Press the PROGRAM button briefly. The setpoint temperature should be blinking.

8. Press the down or up button to adjust the setpoint temperature.

Note: A good rule of thumb is to adjust this about 5 to 7 °F (3 to 5 °C) lower during cycles when you are away to help reduce energy use. If you set the “away” cycles too low, it will take much longer to raise the temperature again and may result in unsatisfying performance.

Note: Some wood and laminate floor manufacturers recommend a maximum of 82 to 84°F (27° to 28°C). Check with manufacturer.

9. Press the PROGRAM button briefly to move to the next cycle number.

10. Repeat Steps 3 through 7 to adjust the remaining cycle times and setpoint temperatures MO through FR, and for the other days of the week.

11. When you finish, or at any time during these adjustments, press the HOLD/RETURN button or wait 15 seconds and the thermostat will return to the normal operating mode. Your adjustments will be saved.

Note: The display in normal operating mode will not show a “U1” indicating “User” schedule. Also, all schedule adjustments are saved in memory and will not be lost during power failure.

Smart Start

Your thermostat is factory set with the “SmartStart” feature turned on. The thermostat automatically determines the best time to begin heating so it reaches your setpoint temperature at the scheduled time.

If this feature is not desired, you may turn it off:

1. Press the OPTIONS button and hold for 1 second.

2. Press the OPTIONS button again until SSt shows on the display.

3. Press the down or up button to toggle this On or Off.

4. Press the HOLD/RETURN button to return to the normal operating mode.

Air Sensing and Regulator Modes

Your thermostat is factory set to operate based on the floor sensor temperature.

This is the recommended method to properly control your floor warming system.

You may also operate your thermostat in either the air sensing mode or regulator mode:

• Air Sensing Mode – This may be useful when the floor warming system is operating as the primary room heating ( your designer must perform heat calculations to determine if this can be done). It operates by an air sensor inside the thermostat. If your floor sensor is connected, it is recommended that you set a Floor Limit temperature to avoid overheating the floor coverings (see Floor Limit below).

• Regulator Mode– This may be useful when the floor sensor was damaged or not installed. The user selects the amount of time the floor warming system heats during a 15-minute repeating cycle. There is no temperature sensing in this mode. (see section 5 “Operation”

If you want it to operate in the air sensing mode or regulator mode, you may change this as follows:

1. Press the OPTIONS button and hold for 1 second.

2. Press the OPTIONS button again until SENS shows on the display.

3. Press the down or up button to toggle this to Air or rEGu.

4. Press the HOLD/RETURN button to return to the normal operating mode.

Floor Limit

If you set your thermostat to operate in Air Sense Mode, the display will show the air temperature but will also monitor the floor sensor if it is connected.

To avoid possibly overheating your floor, you may set a Floor Limit temperature so it turns off the system if the floor sensor temperature exceeds this Floor Limit. Some wood and laminate floor manufacturers recommend a maximum of 82 to 84°F (27° to 28°C). Check with manufacturer. It is factory set to 99F (37C) and can be adjusted as follows:

1. Press the OPTIONS button and hold for 1 second.

2. Press the OPTIONS button again until SET TEMP and FLOOR LIMIT shows on the display with the current Floor Limit temperature.

3. Press the down or up button to adjust this.

4. Press the HOLD/RETURN button to return to the normal operating mode.

Calibration

Your thermostat allows the ability to slightly adjust the display temperature. Normally this is not recommended nor required. However, in special circumstances this may be necessary, and can be done as follows:

1. Press the OPTIONS button and hold for 1 second.

2. Press the OPTIONS button again until CAL shows on the display with the current sensor temperature and the current offset value. The offset value is factory set to zero.

3. Press the down or up button to adjust this.

4. Press the HOLD/RETURN button to return to the normal operating mode.

Resetting Factory Defaults

Your thermostat has the ability to reset all programming, settings, and usage times to the factory defaults. If you are certain you want to do this:

1. Press the OPTIONS button and hold for 1 second.

2. Press the OPTIONS button again until the software version Soft 1.0 or similar shows on the display.

3. Press the down and up buttons at the same time and hold for 1 second. Done and rst will show on the display. The thermostat will go through a startup mode and return to the normal operating mode.

5. Operation

Controlling the Temperature

Your thermostat has several ways to control your floor warming system. It is factory set to operate in the program schedule selected but this can be overridden to meet your needs.

Program Schedule

The thermostat will operate normally in the program schedule selected.

When heat is called for, HEATING will show on the display and full power is supplied to the floor warming system. This also signals to turn on any SunStat Relays that may be connected to your thermostat.

Temporarily Overriding the Temperature

You can temporarily adjust the temperature setpoint as follows. This will hold until the next scheduled program time:

1. Press the down or up arrow button and hold for 1 second to adjust the setpoint temperature.

2. Press the HOLD/RETURN button or wait 5 seconds and the thermostat will return to the normal operating mode, saving your adjustment.

3. To cancel this temporary override and return to the normal schedule temperature, press the HOLD/RETURN button briefly.

Hold a Selected Temperature

You can hold the current setpoint temperature indefinitely, especially useful when you are on vacation.

1. Press the HOLD/RETURN button and hold for 1 second. HOLD will show on the display and the setpoint temperature shown will be maintained until you cancel this hold.

2. To cancel this hold, press the HOLD/RETURN button and hold for 1 second. HOLD will disappear from the display.

3. Press Hold/Return briefly and the thermostat will return to the normal schedule temperature.

Setback

You can use the Setback button to override the current setpoint temperature. This is especially useful if you have an alternate temperature you repeatedly select when you are away.

1. Press the SETBACK button briefly. SETBACK will show on the display and its temperature. This setpoint will hold until the next scheduled program time.

2. To hold this Setback temperature indefinitely, press the HOLD/RETURN button and hold for 1 second. To cancel this hold, press the HOLD/RETURN button again and hold for 1 second.

3. To cancel this Setback temperature and return to the normal schedule temperature, press the SETBACK button briefly.

To change the temperature stored in the SETBACK button:

1. Press the SETBACK button and hold for 1 second. SETBACK will show on the display and its temperature should be blinking.

2. Press the down or up button to adjust the temperature.

3. Press the HOLD/RETURN button or wait 5 seconds and the thermostat will return to the normal operating mode, saving your adjustment.

Remote Control Override

If your thermostat was installed with Remote Control input from a home automation system (see section 2 “Installation”), this will override the thermostat when the remote control system closes its output switch or relay.

SETBACK and HOLD will show on the display and it will operate in the Setback temperature indefinitely. To cancel this, the Remote Control switch or relay must be opened.

Regulator Mode

If you set your thermostat to operate in the regulator mode, it will operate like a timer. You may adjust the amount of time the floor warming system heats during a 15-minute repeating cycle as follows:

1. With the thermostat in the regulator mode, it will show the heating time and the current cycle time.

2. Press the down or up button to adjust the heating time from 0 through 15.

• Example: A value of 6 will cause it to heat for 6 minutes of the 15 minute cycle, and then not heat for 9 minutes of the 15 minute cycle.

• Zero will cause it to never heat.

• 15 will cause it to heat continuously.

3. The cycle time shown at the bottom of the display is the current time in the 15-minute cycle. It repeats from 0:00 through 14:59 (min:sec).

Usage

Your thermostat stores in memory the number of hours it is heating. This information may be useful in calculating the energy used by your floor warming system.

1. Press the OPTIONS button and hold for 1 second.

2. Press the OPTIONS button again until USAGE and 1 d shows on the display.

3. The time shown on the display is the number of hours it was heating today.

4. Press the down or up button to toggle between the previous 1-day, 7-day, and 30-day usages.

5. Press the HOLD/RETURN button or wait 15 seconds and the thermostat will return to the normal operating mode.

Lockout Feature

Your thermostat has the ability to lock out adjustment by other users. This may be useful in public locations. Only the on/off switch and the GFCI test button will then operate.

1. Press the down and up button at the same time and hold for 1 second. LOCK will show on the display.

2. To cancel this lockout, the down and up button must be pressed and held for 1 second. The thermostat will return to the normal operating mode.

Test the GFCI

There is a GFCI (Ground Fault Circuit Interrupter) inside the thermostat. It is designed to help protect people from possible electrical shock if the floor warming system has been damaged.

To make sure the GFCI is operating, test it after it is installed and once each month:

1. Make sure the thermostat is HEATING. You may need to increase the setpoint temporarily.

2. Press the GFCI Test button on the side of the thermostat. GFCI TRIP should show on the display and a red light will show next to the GFCI Test button. You should also hear a click, indicating power has been removed from the floor warming system. If any of these indicators fail, turn off the thermostat and replace it. Do not continue to use.

3. To reset the GFCI, slide the On/Off switch off and back on. If the GFCI does not reset, turn the thermostat off and go to section 6 “Troubleshooting” for help.

6. Troubleshooting

Problem	Problem Solution
Thermostat works but no heat from the system.	1. Check wiring connections. 2. If GFCI is tripped, reset thermostat with on/off switch. 3. Check resistances on floor warming system. See manual for system.
No display.	1. Check wiring connections. 2. Check circuit breaker or other protection “upstream” of thermostat.
GFCI is tripped.	1. Check wiring connections. 2. Reset thermostat by switching off/on. 3. Check resistances on floor warming system. See manual for system.
Heating occurs at wrong times.	1. Check that the current time and schedule times are properly set to AM or PM. 2. On uninsulated concrete SmartStart may start heating very early. You may turn this feature off if not desired.
Er 1 (only at startup)	Floor sensor not correct type or out of range. Check floor sensor resistance.
Er 2	Floor sensor short-circuited. Replace sensor.
Er 3	Floor sensor not attached and thermostat in floor sense mode. Attach sensor.
Er 4 or Er 5	Internal air sensor is faulty. Replace thermostat or operate in floor sense mode.

7. Specifications

Programmable Control Model 500670

Power Supply	120/240 VAC 50/60 Hz
Maximum Load	15 amps, resistive
Maximum Power	1800 watts at 120 VAC 3600 watts at240 VAC
GFCI	Class (5 millamp trip)
Display Range	32F to 140F (0 C to 60 C)
Setting Range	40F to 99F (4 C to 37 C)
Accuracy	+ 0.9 F (0.5 C)
Storage Temp	0 F to 120 F (0 C to 49 C)
Memory	Programming Retained Indefinitely Current time and day will need re-set if power is lost more than 30 minutes
ETL Listing	Control No. 3037530

Technical Specifications

Models:	500670-120CS (120 VAC)
Setting range:	59°F to 95°F (15°C to 35°C); minimum: 45°F (7°C
Potentiometers:	Minimum: 41°F to 77°F (5°C to 25°C) Maximum: 59°F to 95°F (15°C to 35°C)
Accuracy:	0.9°F (0.5°C)
Storage:	––4°F to 120°F (–20°C to 50°C)

Features and Specifications	500670	500675	500680

Dual Voltage 120/240 VAC  50/60	X	X	X
Floor Sensing Control	X	X
Air-Sensing Control Capability	X	X
Regulator (no sensor) Control	X	X
SmartSrart Technology	X	X
“Master” Control Capability	X	X
Manual Temperature Setback	X	X	X
Manual On/Off Switch	X	X	X
Class 2 Insulated Sensor ( 15 Ft. long)	X	X
Large Backlight Digital Display	X	X
Keyboard Lockout	X	X
Remote Control	X	X
Fahrenheit and Celsius Format	X	X
12-hour 24-hour clock display	X	X
15-amp (resistive) Relay output	X	X	X
Class A (5 milliamp trip) GFCI	X	X	X
5/1/1 Day Programming	X
Four preset Schedules	X
One User Set Schedule	X
Usage Monitoring	X
Display Range ——32-140F (0-60C)	X	X
Setting Range —–40 TO 99 F (4 TO 37C)	X	X
Programming Retained Indefinitely	X	X
Listed by ETL for USA and Canada	X	X	X

WARRANTY

WATTS RADIANT, INC. ONE (1) YEAR LIMITED WARRANTY

Watts Radiant, Inc. warrants this thermostat control and sensor (the product) to be free from defects in material and workmanship for a period of one (1) year from the date of original purchase from authorized dealers. During this period, Watts Radiant, Inc. will replace the product or refund the original cost of the product at Watts Radiant’s option, without charge, if the product is proven defective in normal use. Please return the thermostat to our store 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 Watts Radiant, Inc. 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.

International Flooring Center, Inc. / flooringsupplyshop.com.
5047 W Jefferson Blvd
Los Angeles, CA 90016

www.suntouch.com

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