Watts SunStat 500750 User manual

Owner’s Manual
SunStat®View
Programmable Thermostat
Model 500750
The SunStat View model 500750 is designed to operate either a 120 VAC or
240 VAC resistance oor heang system. It comes with an easy setup wizard, a
typical program ready to go, and a GFCI inside to meet safety needs.
Please follow this manual for installaon and operang instrucons. Leave
these instrucons with the homeowner.
Installaon
Cautions to Follow
You are required to thoroughly read all installaon instrucons and product
safety informaon before beginning the installaon of this product. FAILURE
TO COMPLY WITH PROPER INSTALLATION AND MAINTENANCE INSTRUCTIONS
COULD RESULT IN DAMAGE TO THE SYSTEM OR ELECTRIC SHOCK CAUSING
PROPERTY DAMAGE, PERSONAL INJURY AND/OR DEATH. Was is not
responsible for damages resulng from improper installaon and/or
maintenance.
Local building or plumbing codes may require modicaons to the informaon
provided. You are required to consult the local building and plumbing codes
prior to installaon. If this informaon is not consistent with local building or
plumbing codes, the local codes should be followed.
CAUTION: This product requires electrical wiring. It is recommended that
this product is installed by a qualied technician. Local codes may require
this product be installed by an electrician. Prior to installaon, consult
your local codes for what is acceptable in your area. To the extent this
informaon is not consistent with local codes, the local codes should be
followed.
ALWAYS: Wire all circuits as Class 1, Electric Light and Power Circuits
ALWAYS: Wire all circuits with insulaon 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.
WARNING: High voltage – disconnect power supply before servicing.
WARNING: The GFCI (ground-fault circuit interrupter) in this thermostat
control does not protect against shock if both bare conductors are touched
at the same me.
WARNING: Do not exceed 15 amps on this thermostat control. Doing so will
cause risk of re hazard and damage.
WARNING: Make sure the house power supply voltage matches the voltage
rang of the oor heang system. Do not apply 240 VAC to a 120 VAC rated
system. Connecng the wrong voltage may cause overheang and damage
to the system, the control, oor coverings, etc.
Parts Needed
Contents of package:
Unpack the thermostat control and make sure everything is in good condion.
Do not use a damaged control or part. The package comes with these items:
(1) Thermostat
(1) Thermostat oor sensor
(4) Wire nuts (Marees®)
(2) Mounng screws
(1) Screwdriver
Tools and supplies needed:
- No. 2 Phillips screwdriver
- Hole saw (if installing in an exisng wall)
- Wire strippers, wire cuers, and other electrical tools
- Electrical wall box (plasc or metal)*
*NOTE: A single-gang extra-deep box allows sucient space to connect 1 or 2
heang mats or cables. For 3 heang mats or cables, a 4-inch square extra-deep
electrical box with a single-gang “mud ring” is necessary. Alternately, a juncon
box may be installed to connect mulple heang mats or cables, then run
power supply wire from the juncon box to the control electrical box. See the
Installaon Instrucons provided with the oor heang system for
more details.
Locang the Control
Find a suitable locaon for the control. It is designed for indoor dry locaon only.
It may be placed on an insulated or uninsulated wall, preferably an interior wall
to avoid overheang from outside sun heat. Keep it away from water sources
such as sinks, showers, and bathtubs as well as heat sources such as hot-water
piping, heat ducng, wall-mount lighng, and direct sunlight. Locate it at a
suitable height, normally about 4-1/2’ to 5’ (1.4 m to 1.5 m) from the oor.
Mounng the Electrical Box
When mounng on an exisng wall, cut the opening for the electrical box for the
control. To make it easier to pull the wiring, wait to install the electrical box unl
aer all wiring is drawn into this opening.
When mounng on an open wall, secure the electrical box for the control to the
wall stud.
When mounng on an open wall, conduit from the electrical box to the oor is
recommended (check local codes for requirements) for addional protecon.
Install one conduit for the oor sensor. Install another conduit for the oor
heang system power leads. Refer to the Installaon Instrucons supplied with
the oor heang system for addional installaon details.
Wiring
WARNING: Turn o power at the circuit breaker before doing any electrical
work.
House Wiring
A qualied person should run a dedicated circuit from the main circuit breaker
panel to the control locaon. If a dedicated circuit is not possible, it is acceptable
to tap into an exisng circuit. However, there must be enough capacity to
handle the load (amps) of the oor heang system being installed and any
possible appliance, such as a hair dryer or vacuum cleaner. Avoid circuits that
have ballasted lighng, motors, exhaust fans, or hot tub pumps due to possible
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 if desired, but is not necessary.
WARNING: Do not exceed 15 amps on this thermostat control. Doing so
will cause risk of re hazard and damage.
Pull power supply wiring to the control locaon. Leave about 6 to 8 inches (15
to 20 cm) of wire for connecons later. This wiring should be size 12 or 14 AWG
following appropriate local code requirements.
Floor Sensor
Pull the oor sensor wire up the wall (or conduit) to the control locaon, leaving
about 6 inches (15 cm) of wire for connecon later. The sensor wire may be cut
shorter if desired, but do not cut it shorter unl the sensor is fully installed (see
below).
Note: If the sensor wire is not long enough to reach the control locaon, it may
be extended an addional 15 feet (4.5 m) using minimum 20 AWG 2-conductor
unshielded wire, or an addional 50 feet (15 m) using shielded wire. When
using shielded wire, the “shield” must be connected to the lower sensor
terminal, nearest to Bus A. A juncon box may be required by local code for the
connecon to this extension wire.
Aer the oor heang system is completely installed according to its
instrucons, secure the thick sensor p to the oor. It must be located halfway
between heang wires and at least 1 foot into the heang area. Use hot-glue to
secure the sensor p and wire in place. Do not cross over a heang wire. Avoid
placing it in an area where heang wires are spaced further apart than the rest
of the oor, like a large gap between mats or cables. Avoid placing it in an area
where a heat duct or recessed light will cause improper measurements. Try to
avoid locang it where future items such as a clothes hamper or similar could
trap heat and cause improper measurement.
Finish securing the sensor wire along the oor and up the wall. At the control
locaon, cut the sensor wire shorter if needed, leaving at least 6 to 8 inches (15
to 20 cm) of wire for connecons later. Re-strip the sensor wire ends 1/8” to
3/16” (3 mm to 4.5 mm) long. If the ends are stripped longer than this they may
short-circuit, resulng in an error code.
Mat or Cable Power Leads
Pull the power lead wires from the oor heang system into the control
locaon. Leave about 6 to 8 inches (15 to 20 cm) of wire for connecons.
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Wire Connecons
Match and connect the two wires marked “LINE1(L)” and “LINE2(N)” to the
house power supply wires using the wire nuts provided. Gently tug on the wires
to make sure they are secure, otherwise a wire could come loose and cause
failure. For added security, overwrap the connecons with electrical tape.
Match and connect the two wires marked “LOAD1” and “LOAD2” to the power
lead wires from the oor heang system. Secure these wire connecons the
same way.
CAUTION: Make sure the house power supply voltage matches the voltage
rang of the oor heang system. Do not apply 240 VAC to a 120 VAC rated
system. Connecng the wrong voltage may cause overheang and damage
to the system, the control, oor coverings, etc.
Connect the house ground wire to the ground wire(s) from the oor heang
system. If the electrical box is metal, a short length of wire must be secured to
the electrical box from this ground connecon.
Insert the ends of the oor sensor wire into the terminals marked “SENSOR” and
snug the screws. It does not maer which wire goes into which terminal.
SunStat Relay (oponal)
Read and follow the instrucons provided with the SunStat Relay.
Pull 18 AWG to 24 AWG 2-conductor shielded wire through the wall from the
SunStat Relay locaon to this control locaon. This wire may be up 100 feet (30
m) in length (for 18 AWG shielded wire). Strip the wire ends 1/8” to 3/16” (3 mm
to 4.5 mm) long. If the ends are stripped longer than this they may short-circuit.
Connect the wire ends into the “BUS” A and B terminals. Make sure the wire in
“A” terminal is connected to an “A” terminal in the SunStat Relay.
Mounng the Control
Carefully press the wires back into the electrical box. Do not use the control to
push them in, as this may cause connecons to loosen and possible failure.
Loosen the screw and remove the front module from the power module. Secure
the power module into the electrical box with the mounng screws provided.
Snap the front module onto the power module and ghten the screw. Press the
Screw Cover in place to cover screw.
Customizing the Control
The door may be removed and painted to match a room color or special color.
Use a plasc primer to prepare the surface of the door. Use only paints that are
acceptable for this type surface and follow the paint manufacturer instrucons.
CAUTION: Do not paint the door while it is aached to the control and do
not paint any other part of the control. Doing so will cause risk of re and
damage.
Operaon
Overview of Features and Display
Press anywhere on the display if the screen is blank. This wakes the display.
On/O and GFCI
On/O and Reset
Pressing will turn the thermostat on or o. This also Resets the thermostat to
clear an error or GFCI fault. See “GFCI Tesng” and “Troubleshoong”.
GFCI Tesng
The GFCI (Ground Fault Circuit Interrupter) in this control must be tested when
installaon is nished and once each month.
• Make sure the control shows it is Heang. This may require temporarily
increasing the setpoint temperature.
• Press the GFCI TEST buon. GFCI TRIP should be indicated on the control.
There will also be a click sound, indicang power has been removed from
the oor heang system. If either of these indicaons fail, turn o the
thermostat and replace it. Do not connue to use.
• To reset the GFCI TRIP, press the o and back on.
Startup Wizard
This thermostat comes with a “wizard” to help quickly get the user through basic
setup.
• When rst powered up, or upon reseng the factory defaults, the display
shows an introducon. Press “Begin” to proceed.
• Select the language desired from English, French, or Spanish. The selecon
will be highlighted. Press “Next”.
• Select the format for the me (12 hour or 24 hour clock) and temperature
(Fahrenheit or Celsius) and press “Next”.
• Set the me and date and press “Next”.
• The last display shows a short message before pressing “Finish”.
Adjusng the Temperature
Normally the thermostat will run automacally based on the programmed
sengs. However, these sengs may be overridden temporarily or for a
specied period of me.
Overriding Temporarily
To only override the program unl the next scheduled me, press or to
select the desired setpoint temperature. Aer a few seconds will show. To
cancel this override and return to normal scheduled sengs press .
Holding the Override
To override the program for a specic period of me, press the or to select
the desired setpoint temperature. For a few seconds, the display will show an
H buon. Press this buon. The display will show the Hold seng. Press or
to select the desired number of days from 1 to 99, or select “Connuous”.
Press Done! to save this selecon. The thermostat will operate at the setpoint
temperature for the number of days selected, or connuously, before returning
to normal schedule sengs. This feature may be cancelled by pressing the .
Vacaon Hold
To quickly override the program schedule to a low setpoint while on vacaon,
press the . Press Vacaon and conrm. The display will show the preset
temperature and “Vacaon”. This temperature will hold unl is pressed.
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Screw Cover
Cover Screw
Front Module
Load 1
Line 1
Line 2
Load 2
Floor Sensor
Connecon
Power Module
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Stylus

Customizing the Program Schedule
Press Program (buon with calendar). The schedule shown is set for the
highlighted days shown at the top of the display. This is a 7-day programmable
thermostat, so each day can have its own schedule. Press to browse through
each day(s) schedule.
How does a schedule work?
Example:
• To have the oor warm up to 82F at 6:00 AM in the morning, set the WAKE
period to these values.
• To save energy and allow the oor to cool to 74F aer leaving at 8:00 AM,
set the LEAVE period to these values.
• To have the oor warm again to 82F when returning home at 5:00 PM, set
the RETURN period to these values.
• Finally, to save energy overnight and cool the oor to 74F aer 10:00 PM,
set the SLEEP period accordingly.
NOTE: With the SmartStart feature turned on (see SmartStart below), the
thermostat will learn how long it takes the oor to reach 82F and begin warming
up a lile early, reaching 82F by the WAKE me 6:00 AM and again at the
RETURN me 5:00 PM.
To modify the schedule, select the period and then adjust the Start me and the
setpoint temperature using and . To save these new sengs, press Done!.
To clear a period, useful if you want to only raise and lower the oor
temperature once in a day, select the “Disable this period” opon. The schedule
will skip over this period in the schedule. There must be two periods in the
schedule.
Building a New Schedule
To build a completely new schedule, press New Schedule. Follow the on-
screen steps to select the days to schedule and modify each period to the
desired me and temperature. Pressing Next will take you to the remaining
days to be scheduled. Connue modifying the schedule for each day as needed.
When all days have been completed, press Done! to save these sengs.
Changing Sengs
Date/Time
Press . Press to nd Date/Time and select it. The Time display will show.
Set the me by adjusng with the arrow buons. Select Date. Set the month,
day and year. This thermostat will automacally adjust the me for daylight
savings. If you want this ability turned o, de-select the box “Adjust for Daylight
Savings”. When nished, select Done!.
Clock and Temperature Format
Press . Press to nd Format and select it. The display will show the current
formats highlighted. Select the desired formats and then press Done!.
Screen Brightness
The brightness during idle me can be adjusted. Press . Press Brightness.
Adjust the brightness with and and press Done! to save this seng.
Language
Press . Press to nd Language and select it. Select the desired language
and press Done! to save this seng.
Floor Limit
The thermostat can be adjusted for the minimum and maximum allowable
setpoint temperatures of the oor sensor. This is useful when the oor covering
cannot exceed a certain temperature (84F is common for many wood or
laminate products. Consult your oor covering manufacturer for recommended
limits.). It is also useful to limit adjustment by users. And it is useful if the
thermostat is being operated in Air Sensing mode (see Sensor Regulaon below)
but it is sll desired to maintain a minimum oor temperature regardless of the
air temperature.
Press . Press to nd Floor Limit and select it. Adjust the Minimum and
Maximum allowed oor temperature setpoints and press Done! to save these
sengs.
Sensor Regulaon
The thermostat is designed to operate best in Floor Sensing mode. It is also
possible to operate in Air Sensing mode with Floor Sensing limitaon. However,
make sure to set a proper maximum Floor Limit temperature (see Floor Limit
above) to avoid overheang certain oor coverings. Also note that internal
heang in the thermostat may aect the air sensor temperature reading.
Press . Press to nd Sensor Regulaon and select it. Select the desired
sensor mode and press Done! to save this seng.
SmartStart
The thermostat is factory set with the “SmartStart” feature turned on. This
allows the thermostat to learn and automacally determine the best me
to begin heang, reaching the setpoint temperature at the scheduled me.
For example, the schedule may have a “WAKE” start me of 6:00AM to be
82F (27.8C) and SmartStart may begin pre-heang at 5:30AM to reach 82F by
6:00AM.
If this feature is not desired, it may be turned o. Press . Press to select
“SmartStart”. Select “ON” or “OFF” and press Done! to save this seng.
Other Features
Usage
The thermostat stores in memory the number of hours that it is heang. This
informaon may be useful in calculang the energy used by the oor heang
system.
Press . Press to select “Usage”. The display shows the number of hours
it was heang the last 24 hours, last 7 days, 30 days, and since it rst started
heang. To reset these counters to zero, press “Clear”. Press Done! to save this
seng.
Brightness
The screen brightness may be adjusted. Press . Select “Brightness”. Adjust
the brightness and press Done! to save.
Clean Screen
To allow the screen to be cleaned without buon funcons for 30 seconds, press
. Select “Clean Screen” and conrm.
IMPORTANT: Use a dry or damp so cloth only to clean the screen. Do not
spray the screen directly and do not use harsh solvents or abrasives as this may
damage the screen and control.
Calibraon
Under special circumstances it may be desired to slightly adjust the temperature
that is displayed for the sensor. Normally this is not recommended. However,
it can be done by pressing . Press to select “Calibraon’. The display will
show the current sensor temperature and the oset value. Adjust by pressing
or . Press Done! to save.
Reset Factory Defaults
To reset all programming and sengs to the factory defaults, press . Press
to select “Factory Sengs”. It will ask you to conrm by pressing Yes, or press
Cancel to cancel.

Troubleshoong
Problem Soluon
Thermostat works but no heat
from the system.
1. Check wiring connecons.
2. If GFCI is tripped, reset
thermostat with on/o switch.
3. Check resistances on oor
heang system. See manual for
system.
No display 1. Check wiring connecons.
2. Check circuit breaker or
other protecon “upstream” of
thermostat.
GFCI is tripped 1. Check wiring connecons.
2. Reset thermostat by switching
on/o.
3. Check resistances on oor
heang system. See manual for
system.
Heang occurs at the wrong mes 1. Check that the current me and
schedule mes are properly set to
AM or PM.
2. On uninsulated concrete
SmartStart may start heang very
early. You may turn this feature o
if not desired.
Err1:Wrong oor sensor Floor sensor not correct type or
out of range. Check oor sensor
resistance.
Err2:Floor sensor shorted Floor sensor short-circuited.
Turn o power at breaker. Make
sure wires are not crossed at the
terminals. Or replace sensor. Or
Reset Factory Defaults.
Err3:Floor sensor missing Floor sensor not aached and
thermostat is in oor sense mode.
Turn o power at breaker and
aach sensor. Or Reset Factory
Defaults.
Err4/Err5:Internal sensor fail Internal air sensor is faulty. Replace
thermostat or operate in oor
sense mode.
Err6:Internal temp limit Internal temperature overlimit.
Make sure sunlight is not directed
at the thermostat or other heat
sources in proximity. Make sure
load does not exceed 15 amps.
Otherwise, turn o power at
breaker and contact factory.
Err7:End-of-life “End-of-life” indicaon. GFCI will no
longer funcon correctly or safely.
Reset the circuit breaker or replace
thermostat.
Specicaons
Power Supply 120/240 VAC, 50/60 Hz
Maximum Load 15 amps, resisve
Maximum Power 1800 was at 120 VAC
3600 was at 240 VAC
GFCI Class A (5 milliamp trip nominal)
Display Range 32°F to 99°F (0°C to 37°C)
Seng Range 40°F to 99°F (4°C to 37°C)
Accuracy ± 0.9°F (0.5°C)
Environment Indoor dry locaon only
Storage Temperature 0°F to 120°F (-17°C to 49°C)
Floor Sensor Thermistor, 10k NTC type, double-insulated
Memory Programming retained indenitely
Current me/day will need reset if power is lost more than 30 minutes.
ETL Lisng Control No. 3037530
Conforms to UL 873, UL 943, CSA C22.2 No. 24, CSA/CAN C22.2 No. 144
Limited Warranty
Was Radiant 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, Was Radiant will replace
the product or refund the original cost of the product at Was Radiant’s opon,
without charge, if the product is proven defecve 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 installaon, diagnosis, removal or reinstallaon, or any material
costs or loss of use.
This limited warranty is in lieu of all other warranes, obligaons, or liabilies
expressed or implied by the company. In no event shall Was Radiant be
liable for consequenal or incidental damages resulng from installaon
of this product. Some states or provinces do not allow limitaons on how
long an implied warranty lasts, or the exclusion or limitaon of incidental or
consequenal damages, so the above exclusions or limitaons may not apply to
you. This warranty gives you specic legal rights and you may also have other
rights that vary from state to state.
A Watts Water Technologies Company
For Technical Support:
4500 E. Progress Place
Springfield, MO 65803
[phone]
IOM-WR-SS-View 1142