Watts SunStat Dial User manual

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.
Owner’s Manual
Your new SunStat Dial thermostat 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
1-800-276-2419.
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.
SunStat Dial
Dial Thermostat
Model 500710
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.
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, 31⁄2inch deep box.
b. If you are connecting to power leads from 2 or 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. 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 41⁄2feet 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.
power
module
front
module
5
sensor
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.
CAUTION: Before continuing,
make sure your power supply
voltage matches the voltage
rating of your floor warming
system.
Connecting 240V to a 120V floor warming system will cause overheating and
damage to the system and may damage the control, other wiring, floor cover-
ings, etc.
SunStat Relays
1. If you want to use your thermostat to drive a SunStat Relay(s) (ask
your dealer 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. Switch on the thermostat and turn up the temperature to make sure it
is heating for a few minutes (section 3)
b. Test the GFCI (section 3).
1-4
from
power
supply
to
floor
warming
system

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
temperature temporarily.
2. Press the GFCI Test button on the side of the thermostat. A red light should
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 4 “Troubleshooting” for
help.
5. Specifications
Power Supply 120/240 VAC, 50/60 Hz
Maximum Load 15 amps, resistive
Maximum Power 1800 watts at 120 VAC
3600 watts at 240 VAC
GFCI Class A (5 milliamp trip)
Setting Range 40 °F to 99 °F (4 °C to 37 °C)
Accuracy ± 0.9 °F (0.5 °C)
Storage Temp 0 °F to 120 °F (0 °C to 49 °C)
ETL Listing Control No. 3037530
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 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 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.
4. Troubleshooting
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 lights showing. 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.
Right light blinking
on front of
thermostat.
Floor sensor or air sensor is faulty:
> 1s on / 1s off : floor sensor fault. Check connections,
replace floor sensor, or disconnect floor sensor and use
air sensing.
> 0.5s on / 0.5s off : air sensor fault. Connect floor
sensor, or replace thermostat.
3. Operation
On/Off Switch
1. Slide the on/off switch to the upper
position, turning the thermostat on. A green
light will show on the front indicating the
thermostat is turned on. If the light is amber, it
indicates power is applied to the floor warming
system.
2. To turn the thermostat off anytime, slide the
on/off switch to the lower position. No heating
will occur.
Adjust the Temperature
1. Turn the dial clockwise to increase the floor temperature. The light on the
front will be amber when power is applied to the floor warming system.
2. Turn the dial counterclockwise to decrease the floor temperature.
Air or Floor Sensing
During installation, your thermostat should have been connected to a
floor sensor to be embedded with the floor warming system. This is the
recommended method to properly control the system.
However, if the floor sensor was not connected, the thermostat will sense the
air temperature instead, becoming an air thermostat.
on/off