Stelpro STE302R2+ User manual

INSSTE302R2+0711
“STE302R2+”
Electronic thermostat
User’s Guide
www.stelpro.com
For further information or to consult this guide online,
please visit our Web site.

INSSTE302R2+0711
WARNING WARNING
Before installing and operating this product, the
owner and/or installer must read, understand
and follow these instructions and keep them
handy for future reference. If these instructions
are not followed, the warranty will be considered
null and void and the manufacturer deems no
further responsibility for this product. Moreover,
the following instructions must be adhered to
in order to avoid personal injuries or property
damages, serious injuries and potentially fatal
electric shocks. All electric connections must
be made by a qualied electrician, according to
the electric and building codes effective in your
region. Do NOT connect this product to a supply
source other than 120VAC, 208VAC or 240VAC,
and do not exceed the load limits specied.
Protect the heating system with the appropriate
circuit breaker or fuse. You must regularly
clean dirt accumulations on the thermostat. Do
NOT use uid to clean thermostat air vent. Do
not install thermostat in a wet place. However,
installing it in isolated walls is allowed.
Note
When a part of the product specication must be changed to improve operability or
other functions, priority is given to the product specication itself. In such instances, the
instruction manual may not entirely match all the functions of the actual product.
Therefore, the actual product and packaging, as well as the name and illustration, may
differ from the manual.
The screen/LCD display shown as an example in this manual may be different from the
actual screen/LCD display

INSSTE302R2+0711
1.Description
The STE302R2+ non programmable electronic thermostat
can be used to control electric heating units such as electric
baseboards, convectors, or aeroconvectors. It keeps the
temperature of a room at the requested set point with a high
degree of accuracy. This product is designed for installations
with electrical current - with a resistive load - ranging from
0 A to 12,5 A (120/208/240 VAC). It possesses a user-friendly
interface. Furthermore, it gives you the possibility to control
the temperature of a room with great precision.
This thermostat is not compatible with the following
installations:
•electrical current higher than 12,5A with a resistive load
(3000 W @ 240 VAC, 2600 W @ 208 VAC and 1500 W @
120 VAC);
•centralheatingsystem;
•inductiveload(presenceofacontactororarelay).
Parts supplied:
•one(1)thermostat;
•two(2)mountingscrews;
•four(4)solderlessconnectorssuitableforcopperwires.

INSSTE302R2+0711
2. Installation
Selection of thermostat location
The thermostat must be mounted on a connection box on a
wall facing the heating unit, at around 1.5m (5feet) above
the oor level, on a section of the wall exempt from pipes
or air ducts.
Do not install the thermostat in a location where temperature
measurements could be altered. For example:
•closetoawindow,onanexternalwall,orclosetoadoor
leading outside;
•exposeddirectlytothelightorheatoftheSun,alamp,a
replace or any other heat source;
•closeorinfrontofanairoutlet;
•closetoconcealedductsorachimney;and
•inalocationwithpoorairow(e.g.behindadoor),orwith
frequent air drafts conditions (e.g. head of stairs).

INSSTE302R2+0711
Thermostat mounting and connection
1. Cut off power supply on lead wires at the electrical
panel in order to avoid any risk of electric shock.
2. Ensure that the air vents of the thermostat are clean and
clear of any obstruction.
3.Using a screwdriver, loosen the screw retaining the
mounting base and front part of the thermostat. Remove
the front part of the thermostat from the mounting base by
tilting it upward.
4. Align and secure the mounting base to the connection box
using the two screws supplied.

INSSTE302R2+0711
5. Take the wires from the wall through the hole at the base
of the thermostat and connect them using the supplied
solderless connectors. When making the connection with
aluminum wire, make sure that you are using connectors
identied CO/ALR. Please note that the thermostat wires
do not have polarity. Therefore, the way they are connected
is not important.
Four-wire installation
6. Reinstall the front part of the thermostat on the mounting
base and tighten the screw at the bottom of the unit.
7. Turn on the power.
8. Set the thermostat to the desired setting (see the
following section).

INSSTE302R2+0711
3. Operation
Ambient temperature/
Timer
Heating power used
indicator
Smart mode
Security mode
Fan mode
Button (+)
Pictograms
Frost-free warning
Day mode
Night mode
Button (-)
Day/Night button
Backlit button
Powering on for the rst time
When powering on for the rst time, the thermostat is initially
set to Day mode. The temperature is displayed in Celsius and
is set at 21 degrees by default.
Language (French/English)
To switch the display from French to English and conversely,
press down the backlit button for 20seconds. The display is
set in French by default.

INSSTE302R2+0711
Backlit screen
The backlight screen lights up when you press down
a button. If you do not press down any button during
15seconds, the blacklight screen will turn off. It is possible
to turn on the backlit screen without modifying anything
by pressing down the (+) or (-) button once or by pressing
down the Sun or Moon button when the backlit screen is off.
You can also turn on the backlit screen by pressing down
the backlit screen button.
Temperature set points
The gures displayed above the pictogram indicate the
temperature set point. It can be displayed in degrees Celsius
or Fahrenheit (see “Display in degrees Celsius/Fahrenheit”).
To adjust the set point, just press down the (+) button to
increase the value, or the (-) button to decrease it. Set points
can be adjusted by increments of 0.5°C or 1°F. To quickly
scroll through the set point values, press and hold down
the button. The minimum set point is 3°C (37°F), and the
maximum set point is 30°C (86°F).

INSSTE302R2+0711
Day mode and Night mode
The thermostat includes a Day mode (Sun) and a Night
mode (Moon), both of them having their own independently
adjustable and recorded set point. The ambient temperature
is displayed above the set point, in degrees Celcius or
Fahrenheit. When switching from one mode to the other,
the system will automatically use the temperature set point
corresponding to the Day/Night mode selected. The standard
factory set point adjustment is 21°C (70°F) for the Day mode,
and 18°C (64°F) for the Night mode.
In order to manually switch from one mode to the other, press
down the Day or Night button and release it immediately.
In Day mode, you can turn off the thermostat by lowering the
set point below 3°C. The set point value displayed will be --.-,
and heating system start up will be impossible.
Night mode timer
The Night mode features a timer that automatically returns
to the Day mode after a selectable time period. This timer
allows the temporary use of a temperature set point. The
standard factory adjustment of the timer is 8 hours. With
this adjustment, the thermostat automatically returns to Day
mode 8hours after being switched to the Night mode.
For example, if you want a night temperature lower than the
day temperature, both Day/Night modes set points will rst
have to be set at the desired temperatures. Before bedtime,
the Night mode temperature set point will be activated by
switching manually to the Night mode. The timer is set for the
duration of the night. The thermostat will automatically return
to the Day mode at the end of the night, and the Day mode
temperature set point, which is higher, will become effective
at this time.

INSSTE302R2+0711
Night mode timer adjustment procedure
1. First, switch to the Night mode by pressing down the Day/
Night button and releasing it immediately (press it down
twice if the backlit screen is off and once if the backlit
screen is on).
2. From the Night mode, simultaneously press down the (+)
and (-) buttons for more than 3seconds. Then, the number
of programmed hours will be displayed by the three gures
at the top of the screen and ‘‘HRS’’ will be displayed
instead of the three gures at the bottom of the screen.
Then, you can release the buttons.
3. If needed, adjust the timer by pressing down the (+) button
to increase the value, or the (-) button to decrease it. The
adjustment range is from 1hour to 999hours. To quickly
scroll through timer values, press and hold down the
button.
4. When the adjustment is completed, release the buttons
and wait for 5 seconds to exit the adjustment function.
Then, the thermostat will automatically switch to the Night
mode.
NOTE: The Night mode timer will be automatically reinitialized
to the latest recorded value when switching from the
Day mode to the Night mode. It is not necessary to
readjust the timer every time you switch to the Night
mode. The timer is also reinitialized when this value
is adjusted.
Once the timer has completed its cycle and when the
thermostat is in the Day mode, you must manually return to
the Night mode. If you want to automatically return to the
Night mode, the Smart mode must be selected.

INSSTE302R2+0711
Smart mode
The Smart mode, which is associated to the Night mode
timer, allows alternating between the Day/Night modes and
the two corresponding set points over a 24-hour period.
Once activated, this mode allows an automatic return to the
Night mode after 24hours. The Smart mode allows you to
dene two periods in a single day with different set points.
For example, if the Smart mode is activated and the Night
mode timer is set at 8hours, the thermostat will be operating
in the Night mode for 8hours at the night temperature set
point. Then, it will return to the Day mode for 16 hours
operating at the day temperature set point. At the end of the
24-hour cycle, the thermostat will return to the Night mode,
and the cycle will start again. The 24-hour cycle starts with
the Night mode as soon as the Smart mode is activated. The
Smart mode activation should be made when you want to
return to the Night mode. The normal course of a cycle in the
Smart mode is as follows:
1- Night mode: activated for the duration of the Night mode
timer cycle. It returns to the Day mode when the timer
cycle is completed.
2- Day mode: activated for the remaining time of the 24-hour
cycle. It returns to the Night mode at the end of the 24-
hour cycle.
Adjustment procedure of the Smart mode:
1. When the thermostat is set in Day mode, switch to the
Night mode by pressing down the Day/Night button and
releasing it immediately (press it down twice if the backlit
screen is off and once if the backlit screen is on).
2. From the Night mode, simultaneously press down the (+)
and (-) buttons for more than 3seconds. Then, the number
of programmed hours will be displayed by the three gures
at the top of the screen and ‘‘HRS’’ will be displayed

INSSTE302R2+0711
instead of the three gures at the bottom of the screen.
Then, you can release the buttons.
3. Activate the Smart mode by simultaneously pressing down
the (+) and (-) buttons for at least 3seconds. The icon
will appear. If the Smart mode was already activated, the
same procedure should be used to deactivate it.
4. When the adjustment is completed, release the buttons
and wait for 5seconds to exit the adjustment function.
NOTE: It is always possible to manually change the Day/
Night mode during a 24-hour cycle. This will not
change the 24-hour cycle and the automatic return
to the Night mode. However, the Smart mode will
be deactivated if the thermostat is set off (--.-).
When turning back on after being powered off
(because of a power failure, for example), the Smart
mode is deactivated, and, if previously activated, the
icon will blink. The blinking will stop as soon as
you press down a button.

INSSTE302R2+0711
Display in degrees Celsius/Fahrenheit
The thermostat can display the ambient temperature and
the set point in degrees Celsius (standard factory setting) or
Fahrenheit.
Selection procedure for degrees Celsius/Fahrenheit
display.
1.From the Day mode, simultaneously press down the (+) and
(-) buttons for more than 3seconds. Then, the set point will
blink. Release the buttons.
2.Press down the (+) button to switch from the degrees
Celsius to the degrees Fahrenheit, and conversely. The
degrees Celsius (C) or Fahrenheit (F) symbol will be
displayed.
3. When the adjustment is completed, release the buttons
and wait for 5seconds to exit the adjustment function.
Temperature control
The thermostat controls the temperature of the ambient air
with precision. When the heating comes on or shuts off, it is
normal to hear a ‘‘click’’ sound. This noise is caused by the
relay opening or closing, depending on the situation.

INSSTE302R2+0711
Programmable heating cycle
This setting allows the length of a heating cycle to be adjusted.
To activate this programmable heating cycle setting, the
thermostat should be in Day mode and the user must press
and hold down the (+) and (-) buttons for 20seconds. Note
that the SET icon will blink after 3 seconds, but you must
hold down the buttons until SEC appears at the bottom of the
screen. Then, release the buttons. It is important to keep the
two buttons pressed down to avoid switching to the Security,
Fan or Celcius/Fahrenheit modes. After the 20seconds, the
three top gures will display the number of seconds for a
heating cycle and SEC will be displayed at the bottom of the
screen.
Heating power indicator
The level of power used to maintain the temperature at the
set point is expressed as a percentage indicated by the
number of bars in the thermometer displayed. The heating
power used is displayed as follows:
4bars = 75% to 100%
3bars = 50% to 75%
2bars = 25% to 50%
1bar = 1% to 25%
0bar = no heat
Frost-free warning
The Snowake icon is displayed when the temperature set
point is between 3°C (37°F) and 5°C (41°F). A minimum
temperature will be maintained to ensure frost control.

INSSTE302R2+0711
Security mode
It is possible to impose a maximum temperature set point by
activating this mode. Then, it becomes impossible to exceed
this set point, regardless of the current mode. However, it is
still possible to lower the set point at your discretion.
Procedures to activate the Security mode
1.To activate the Security mode, from the Day mode adjust
the day set point to the desired maximum temperature.
2.From the Day mode, simultaneously press down the (+) and
(-) buttons for more than 13 seconds (note that the SET
icon will blink after 3seconds, but hold down both button
or you will nd yourself in the degree adjustment mode or
in Fan mode).
3.The icon will appear after 13 seconds, indicating that
the Security mode is activated. Release the buttons.
Procedures to deactivate the Security mode
1.To deactivate the Security mode, start by cutting thermostat
power at circuit breaker and wait at least 20seconds.
2.Turn thermostat power back on and the icon will blink
for a maximum of 5minutes, indicating that it is possible to
deactivate the Security mode.
3.Simultaneously press down the (+) and (-) buttons for more
than 13 seconds. (Note that the SET icon will blink after
3 seconds, it is important to hold down the two buttons
to avoid switching to the adjustment or Fan mode). After
13seconds, the icon will disappear, indicating that the
Security mode is deactivated. Release the buttons.

INSSTE302R2+0711
Fan mode
The activation of the Fan mode is similar to the Celsius/
Fahrenheit adjustment. To activate or deactivate the
Fan mode, you must press down the (+) and (-) buttons
simultaneously for at least 3 seconds while in Day mode.
Once the 3seconds have passed, the SET icon will blink.
At this point, release the buttons. You must then press down
the (-) button to activate or deactivate the Fan mode. The Fan
icon will turn on or off depending on the case.
When Fan mode is activated, the heating cycle is established
at 15minutes. The deactivation of the Fan mode will cause
the thermostat to go back to the heating cycle previously
programmed. Once the adjustment nished, we can exit the
Fan mode by not pressing on any button for 5seconds.

INSSTE302R2+0711
Parameters saving and power failures
The thermostat saves some parameters in a non-volatile
memory to be able to recover them after being shut off (a
power failure, for example). These parameters are the Day/
Night settings, the Smart mode, the state of the Security
mode, the maximum setting of the Security mode, the
Celsius/Fahrenheit mode, the number of hours on the night
time-switch, the language, Fan mode, the number of minutes
associated to a heating cycle, the number of hours remaining
on the night time-switch and the current Day/Night mode.
These parameters are saved every minute if any changes are
made, except for the Day/Night mode and the remaining time
left on the time-switch. These are saved only if the Smart
mode had not been activated.
Please note that the Smart mode is not automatically
reactivated when the thermostat is turned on. The
icon blinks to warn the user that the mode was previously
activated when thermostat was shut off but is no longer
active.
Furthermore, when power is shut off, the existing Day/
Night mode is recovered only if the Smart mode was
previously deactivated. In the opposite case, the Day mode
is automatically reactivated. The Security mode is also
reactivated if it was activated before the being shut off.
However, the icon will blink for 5minutes, during which it is
possible to deactivate the Security mode as it was described
in Procedures to deactivate the Smart mode. If this is not
done, the Smart mode will stay activated and the icon will
stop blinking.

INSSTE302R2+0711
4. Troubleshooting
Problem Solution
The thermostat is hot.
In normal operating
conditions, the thermostat
housing can reach nearly
40°C at maximum load. That
is normal and will not affect
the effective operation of the
thermostat.
Heating is always on. Check if the thermostat is properly connected. Refer to
the installation section.
Heating does not run
even if the thermostat
indicates it is on.
Check if the thermostat is
properly connected. Refer to
the installation section.
The display does not
turn on.
Check if the thermostat is
properly connected. Refer
to the installation section.
Check the power supply at the
electrical panel.
The displayed ambient
temperature is
incorrect.
Check the presence of an air
stream or a heat source near
the thermostat, and correct
the situation.
The display indicates
E1 or E2. Faulty thermal sensor. Contact the customer service.
Weak luminosity of the
display.
Possibility of a bad contact.
Check thermostat wirings.
Refer to the installation
section.
N.B. If you are unable to solve the problem after having
veried these points, please communicate with our
customer service. Consult our website for the phone
numbers.

INSSTE302R2+0711
5. Technical specications
Supply voltage:
120/208/240 VAC, 50/60 Hz
Maximum electrical current with a resistive load:
12,5 A
3000 W @ 240 VAC
2600 W @ 208 VAC
1500 W @ 120 VAC
Temperature display range:
3°C to 40°C (37°F to 99.5°F)
Temperature display resolution:
0.5°C (0.5°F)
Temperature set point range:
3°C to 30°C (37°F to 86°F)
Temperature set point increments:
0.5°C (1°F)
Storage temperature:
-40°C to 50°C (-104°F to 122°F)

INSSTE302R2+0711
Limited warranty
This unit has a 3-year warranty. If at any
time during this period the unit becomes
defective, it must be returned to its place
of purchase with the invoice copy, or simply
contact our customer service department
(with an invoice copy in hand). In order
for the warranty to be valid, the unit
must have been installed and used ac-
cording to instructions.If the installer or
the user modies the unit, he will be held
responsible for any damage resulting from
this modication. The warranty is limited to
the factory repair or the replacement of the
unit, and does not cover the cost of discon-
nection, transport, and installation.
Customer service
Stelpro Design inc.
1041, Parent Street
Saint-Bruno-de-Montarville (Quebec)
Canada J3V 6L7
E-mail: [e-mail]
Web site: www.stelpro.com