Stelpro STE402P User manual

INSSTE402P0711
“STE402P”
Programmable electronic thermostat
User’s guide
www.stelpro.com
For further information or to consult this guide online, please visit our Web site.

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1.Description
The electronic thermostat STE402P can be used to
control electric heating units such as electric base-
boards, convectors, or aeroconvectors. It keeps the
temperature of the room at the desired set point with
WARNING
Before installing and operating this product,
the owner and/or installer must read, under-
stand and follow these instructions and keep
them handy for future reference. If these in-
structions are not followed, the warranty will
be considered null and void and the manu-
facturer deems no further responsibility for
this product. Moreover, the following in-
structions must be adhered to in order to
avoid personal injuries or property dam-
ages, serious injuries and potentially fa-
tal electric shocks. All electric connections
must be made by a qualied electrician,
according to the electrical and building
codes effective in your region. Do NOT con-
nect this product to a supply source other
than 120 VAC to 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 accu-
mulations on the thermostat. Do NOT use
uid to clean thermostat air vents.
Note: This handling description is printed prior to
product development. 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.
a high degree of accuracy. It has an easy user inter-
face and can manage up to four programming periods
a day. This product is designed for installations with
electrical current − with a resistive load − ranging from
1.2 A to 16.7A at 120/240 VAC.
This thermostat is not compatible with the
following installations:
• electricalcurrenthigherthan16.7Awitharesistive
load (4000 W @ 240 VAC and 2000W @ 120 VAC);
• electricalcurrentlowerthan1.2Awitharesistive
load (300 W @ 240 VAC and 150 W @ 120 VAC);
• inductiveload(presenceofacontactororarelay);
• centralheatingsystem.
Parts supplied:
• one(1)thermostat;
• two(2)mountingscrews;
• two(2)solderlessconnectorssuitableforcopperwires.
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 ex-
empt 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;
•inalocationwithpoorairow(e.g.behindadoor),or
with frequent air draft conditions (e.g. head of stairs).

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INSSTE402P0711
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. Make the required connections using the following
gures by selecting the proper type of installation (2
wires or 4 wires), and using solderless connectors.
For connections with aluminium wires, you must use
CO/ALR connectors. Please note that this thermostat
does not have polarity, which means that any wire
can be connected to the other;
Two-wire installation
Four-wire installation
4. Using a screwdriver, loosen the screw retaining
the mounting base and front part of the thermo-
stat. Remove the front part of the thermostat from
the mounting base by tilting it upward;
5. Align and secure the mounting base to the con-
nection box using the two screws supplied;
6 . Reinstall the front part of the thermostat on the
mounting base and tighten the screw at the bot-
tom of the unit;
7. Turn on the power;
8. Set the thermostat to the desired setting (see the
following section). Important: you must activate
the Fan mode when the heating unit is equipped
with a fan; failure of the heating unit could occur
if not doing so.

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3. Operation
Ambient temperature
The gures displayed above the icon indicate
the ambient temperature, ± 0.5 degree. Tempera-
ture can be displayed in degrees Celsius or Fahren-
heit (see “Display in degrees Celsius/Fahrenheit”).
Temperature set point
The gures displayed above the icon indicate
the temperature set point. It can be displayed in
degrees Celsius or Fahrenheit (see “Display in de-
grees Celsius/Fahrenheit”).

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INSSTE402P0711
Out of any adjustment mode, press down the
+ button to increase the set point, or the - button
to decrease it. Set points can only be adjusted by
increments of 0.5 degree. To quickly scroll through
the set point values, press and hold down the but-
ton. The minimum set point is 3°C (37°F), and the
maximum set point is 30°C (86°F).
Adjustment of the hour and the day of the week
Adjustment procedure of the hour and the day of
the week:
1. Press down the Jr/Day/Hr button, whether it is
from Man, Auto or Pre Prog mode;
2. At this moment, the icon and the day of the
week start to blink and you can adjust the day of
the week using the + or - button and conrm your
choice by pressing down the Mode or the Jr/Day/
Hr button. You can also press down the day of the
week button desired without using the + or - but-
ton and conrm your choice using the Mode or
Jr/Day/Hr button;
3. The two gures indicating the hour blink. You
must adjust them using the + or - button and
conrm your choice by pressing down the Mode
or Jr/Day/Hr button;
4. The two gures indicating the minutes blink.
You must adjust them using the + or - button
and conrm your choice by pressing down the
Mode or Jr/Day/Hr button. The adjustment is
then completed and the thermostat returns to
the previous mode.
At any time, you can exit the adjustment mode
of the day and the hour using one of these 2
methods.
1- Press down the Sortie/Exit button.
2- Press and hold down the Mode button.
3- Do not press down any button during 1 minute.
The adjustment of the hour and the day of the
week can be done from any of the three modes.
In case of a power failure, the thermostat is self-
sufcient for 2 hours. If the failure lasts less than
2 hours, the thermostat saves the adjustment of
the hour and the day of the week. When the power
is restored after an extensive failure, the hour and
the day of the week are recovered, but you must
update them.
Display in degrees Celsius/Fahrenheit
The thermostat can display the ambient tempera-
ture and the set point in degrees Celsius (standard
factory setting) or Fahrenheit.
Adjustment procedure for degree Celsius/Fahren-
heit display
1. To switch from the degrees Celsius to the de-
grees Fahrenheit, and conversely, simultane-
ously press down the + and - buttons for more
than 3 seconds until the icon starts to blink;
2. Press down the + button to switch from the de-
grees Celsius to the degrees Fahrenheit, and
conversely. The degree Celsius or Fahrenheit
symbol will be displayed;
3. When the adjustment is completed, press down
the Sortie/Exit button, hold down the Mode but-
ton or do not press down any button during 1
minute to exit the adjustment function.
Note: This adjustment can be done from any of the
three principal modes. From the adjustment mode,
the gures displayed at the top of the screen are
only useful for the manufacturer. It is not the ambi-
ent temperature.
Manual mode (Man)
From the Manual mode, you can manually adjust
the thermostat set point by pressing down the +
or - button to increase the value, or to decrease

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it. To quickly scroll through the set point values,
press and hold down the button. The set points
can range between 3 and 30°C and can only be
adjusted by increments of 0.5°C (from 37 to 86°F;
by increments of 1°F from the Fahrenheit mode).
The thermostat will turn off if the set point is low-
ered below 3°C, and the set point value displayed
will be --.-. The standard factory set point adjust-
ment is 21°C. From this mode, the screen displays
the temperature, the set point, the heating power
used, the hour and the day of the week.
This mode is initially activated when the power is
turned on for the rst time. You must adjust the
hour (as describe in the section “Adjustment of the
hour and the day of the week”) before switching to
other modes by pressing down the Mode or Pre
Prog button.
Automatic mode (Auto)
To switch from the Manual mode to the Automatic
mode, and conversely, press down the Mode but-
ton. The Man or Auto icon will be displayed at the
bottom of the screen as applicable.
From the Automatic mode, the thermostat adjusts
the set points according to the programmed peri-
ods. If no data was entered, the thermostat acts
the same way as from the Manual mode and the
standard factory set point adjustment is 21°C. It
is always possible to manually adjust the set point
using the + or - button. The selected set point
will be effective until one period is programmed,
which represents an hour and a day of the week.
Note that if the set point is lowered to off (--.-), the
programming will not be effective. It is possible to
program 4 periods a day, which means that the set
point can change automatically up to 4 times a
day. The period order is not important.
From this mode, the screen displays the tempera-
ture, the set point, the heating power used, the
hour, the day of the week and the current pro-
grammed period number (1 to 4; displayed on the
right-hand side of the hour).
Programming procedure of the Automatic mode
1. To access the Programming mode, press down
the day of the week button that you want to pro-
gram (Mon to Sun). Once you release the button,
the selected day of the week is displayed, the
icon blinks and the period number 1 blinks too;
2. Select the period number (1 to 4) that you want
to program using the + or - button. For each pe-
riod, the hour and the set point are displayed.
The hour displays --:-- and the set point displays
-- if there is no programming for the period. You
must conrm the period by pressing down the
Mode button;
3. The two gures representing the hour blink to
indicate that you can adjust them (from 00 to 23)
using the + or – button. You must conrm the
adjustment by pressing down the Mode button;
4. After conrmation, the gures representing the
minutes (the last 2 gures) blink and you can ad-
just and conrm them in the same manner as de-
scribed above (point 3). It should be noted that
the minutes can only be adjust by increments of
15 minutes;
5. The period set point blinks and you can adjust it
using the + or - button;
6. After set point conrmation, the programming
is completed. The period number increased by
1 and blinks. For example, if the previously pro-
grammed period was 1, period 2 blinks. It is then
possible to continue the programming of this pe-
riod by pressing down the Mode button. You can
also select another period using the + or – button;
7. At the end of the period 4 programming, you au-
tomatically exit the Programming mode.

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INSSTE402P0711
At any time, you can exit the Programming
mode using one of the 3 following methods:
1-Press down the button of the day that you are
adjusting.
2-Press down the button of another day to pro-
gram it.
3-Press down the Sortie/Exit button.
Moreover, if you do not press down any button for
more than 1 minute, the thermostat will exit the
Programming mode. In all cases, the programming
is saved.
Anticipated start
This mode enables the room to reach the selected
temperature at the programmed hour. In fact, the
thermostat estimates the delay required to reach
the set point of the next period at the programmed
hour. This delay is obtained by the observation of
the temperature variations in the room and the
results obtained during the preceding anticipated
starts. That way, the results should be increasingly
precise day after day. From this mode, the thermo-
stat displays at any time the set point ( ) of the
current period. The anticipated start icon ( ) will
blink when the anticipated start of the next period
will begin.
For example, if the requested temperature be-
tween 8h00am and 10h00pm is 22°C and between
10h00pm and 8h00am is 18°C, the set point ( )
will indicate 18°C until 7h59am and will switch to
22°C at 8h00am. Thus, you will not see the pro-
gression carried out by the anticipated start, but
only the desired result.
To activate or deactivate the anticipated start, the
thermostat must be in the Auto or Pre Prog mode.
Then, you must press down the Mode button for
at least 5 seconds. The anticipated start icon ( )
will appear or disappear to indicate the activation
or the deactivation of the mode. This modication
will apply to the Auto as well as the Pre Prog mode.
If you modify the temperature set point manually
when these modes are activated, the anticipated
start of the next period will be cancelled.
Note: Please note that the anticipated start is ini-
tially activated when you enter the Automatic or
Preprogrammed mode. Thus, you must deactivate
it following the above procedure if needed.
Copy of the programming
You can apply the programming of one day of the
week to other days by copying the programming
one by one or in block.
To copy the programming one by one, you must:
1. press down the source day button (day to be
copied);
2. hold down this button and press down the desti-
nation days one by one. The screen displays the
selected days as you select them. If an error oc-
curs when you are choosing a day, press down
the erroneous day again to cancel the selection;
3. after all selections are completed, release the
source day button. Then, the selected days have
the same programming as the source day.
To copy the programming in block, you must:
1. press down the source day button and then the
button of the last day of the block to be copied;
2. hold down these two buttons during 3 seconds.
After this time, the destination days are dis-
played indicating that the copy in block is acti-
vated;
3. release the buttons. The days of the block are
not displayed anymore and the current day is
displayed.
Note: The block order is always increasing. For ex-

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ample, if the source day is Thursday and the des-
tination day is Monday, the copy will only include
Friday, Saturday, Sunday and Monday.
Erasing of the programming
You must proceed as follows to erase a program-
ming period.
1. Access the Programming mode as described
previously by pressing down the day of the week
button to modify. The period number will blink
and you must adjust it using the + or - button in
order to select the period to be erased;
2. It is not necessary to press down the Mode but-
ton to conrm the period selection, but you can
do it;
3. Simultaneously press down the + and – buttons
during 2 seconds to erase the period program-
ming. The hour displays --:-- and the set point
displays -- to indicate that the programming is
erased;
4. The erased period number blinks and you can
select another period to be erased or exit the
Programming mode following one of the 3 meth-
ods described in the previous page.
Preprogrammed mode
The Preprogrammed mode allows an automatic
programming of the thermostat. Up to 252 prepro-
grammings (A0 to Z1 and 0 to 9; see appendix 1
attached) are dened in factory and easily acces-
sible. This mode gives you the possibility to quickly
program the thermostat using commonly used pre-
programmings without having to do it manually.
As from the Automatic mode, it is possible at any
time to manually adjust the set point. This set point
will be effective until the next set point change an-
ticipated by the preprogramming. Note that if the
set point is lowered to off (--.-), the programming
will not be effective.
From this mode, the screen displays the tempera-
ture, the heating power used, the set point, the
hour, the day of the week and the letter and the
current number of the pre-programming (A0 to Z1
and 0 to 9; displayed on the right-hand side of the
hour; see appendix 1 attached).
Choice of the preprogramming
You can only access the Preprogramming mode
when the thermostat is out of any programming
function or adjustment.
You must proceed as follows to access the Prepro-
gramming mode:
1. Press down the Pre Prog button;
2. The Pre Prog icon is then displayed and the
saved selected preprogramming is displayed as
well. This preprogramming can range between 0
and Z1;
3. From the Pre Prog mode, you can choose the
rst 10 preprogrammings by pressing down
the Pre Prog button and release it successively.
Each time you press down the button, the pre-
programming switch from 0 to 9. Once you have
reach 9, you come back to 0;
4. To choose the advanced preprogrammings,
(see appendix 1), press down the Pre Prog but-
ton during 5 seconds. Then, the letter indicator
blinks and you can adjust it by pressing down
the + or - button successively or by holding
them down. Once the letter is chosen, you must
validate your choice by pressing down the Mode
button. Then, the letter ceases to blink and the
gure starts to blink. The choice of the gure is
made in the same way as that of the letter; using
the + or - button. Once the gure is selected, you
must validate your choice by pressing down the
Mode button.

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INSSTE402P0711
Note: From this mode, if you do not press down
any button during more than 1 minute, the ther-
mostat exits the adjustment function and saves the
choice in progress. Then, the icons cease to blink
and the selected value remains displayed.
View of the preprogramming
The view of the selected preprogramming is made
in a way similar to the Auto mode programming.
However, it is impossible to modify the prepro-
gramming.
You must proceed as follows:
1. Press down the day of the week button that you
want to view (buttons Mon to Sun). When the se-
lected day of the week is displayed, the icon
blinks and the period number 1 blinks too;
2. Choose the period number (1 to 2) to view using
the + or - button. For each period, the hour and
the set point are displayed. You can also press
down the Mode button to increase the period
number. If you press down the Mode button
when period 2 is displayed, you exit the View
mode.
At any time, you can exit the View mode using
one of these 3 methods.
1- Press down the button of the day that you are
viewing.
2- Press down another day to view it.
3- Press down the Sortie/Exit button.
If you do not press down any button during 1 min-
ute, the thermostat exits the View mode. At any
time, it is possible to change the day to be viewed
by pressing down the desired day button.
Fan mode
When the thermostat is used to control a heating
system equipped with a fan, the Fan mode MUST
be activated. This mode prevents the system to
continuously start and stop, which could cause fan
failure. The Fan mode is by default deactivated at
the factory. The status of this mode is indicated on
the display by the Fan icon.
You can activate the Fan mode in a similar way to
the adjustment of the degrees Celsius/Fahrenheit.
Adjustment procedure for the Fan mode
1. Simultaneously press down the + and - buttons
for more than 3 seconds, until the icon starts
to blink;
2. Press down the - button to activate or deactivate
the Fan mode. The Fan icon will be displayed or
not, as applicable;
3. When the adjustment is completed, press down
the Sortie/Exit button, hold down the Mode but-
ton or do not press down any button during 1
minute to exit the adjustment function.
Note: This adjustment can be done from any of the
three principal modes. From the adjustment mode,
the gures displayed at the top of the screen are
only useful for the manufacturer. It is not the ambi-
ent temperature.
Frost-free warning
The Snowake icon is displayed when the tem-
perature set point is between 3°C (37°F) and 5°C
(41°F). A minimum temperature will be maintained
to ensure frost control.

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10
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 mode. However, it is still possible to lower the
set point at your discretion. The programming of
the Auto and Pre Prog modes also adhere to this
maximum temperature set point.
Activating the Security mode
1. Exit any adjustment mode and manually adjust
the set point at the desired maximum value;
2. Simultaneously press down the + and - buttons
during 10 seconds (note that after 3 seconds,
the icon starts to blink and the version num-
bers and the software date are displayed. Hold
down these buttons, if not, you will enter in the
degrees/fan adjustment mode);
3. After 10 seconds, the icon is displayed indi-
cating that the Security mode is activated. Then,
release the buttons.
Deactivating the Security mode
1. To deactivate the Security mode, cut off the
power supply of the thermostat at circuit breaker
and wait at least 30 seconds;
2. Restore the power supply of the thermostat. The
icon will blink during at least 5 minutes, indicat-
ing that you can deactivate the Security mode;
3. Simultaneously press down the + and - buttons
during more than 10 seconds. The icon will
then disappear indicating that the Security mode
is deactivated.
Temperature control
The thermostat controls the temperature of a room
with a high degree of accuracy.
The level of power used to maintain the tempera-
ture at the set point is expressed as a percentage
indicated by the number of bars in the thermome-
ter displayed. The heating power used is displayed
as follows:
0 bar = no heating
1 bar = 1% to 25%
2 bars = 25% to 50%
3 bars = 50% to 75%
4 bars = 75% to 100%
Power failure
The thermostat can detect a power failure. In such
a case, the adjustments are automatically saved
and recovered when power is restored. Then, the
thermostat enters in a very low consumption mode
and only displays the hour and the day of the week.
All the other functions are deactivated.
If the power failure lasts less than 2 hours, the ther-
mostat thus saves the adjustment of the hour and
the day of the week. When power is restored after
an extensive failure (more than 2 hours), it recov-
ers the last mode (Man/Auto/PreProg) as well as
the various adjustments that was effective when
the failure occurred. The hour and the day of the
week are not recovered after a power failure of 2
hours and more.
Note: During the rst half hour of the failure, the
hour and the day of the week are displayed. After
half an hour, the screen turns off in order to ensure
an energy saving.

11
INSSTE402P0711
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 come on.
Check if the thermostat is properly connected. Refer to the
installation section. Check the power supply at the electrical
panel. Ensure that the heating unit has a switch. If so, ensure
that this switch is turned on.
The display turns off a few
minutes and then turns on again.
The thermal protection of the heating unit has deactivated the
unit due to overheating. Ensure that the heating unit is in good
condition of operation and that clearance around the appliance
is according to the manufacturer’s specications.
The display has low contrast
when heating is on.
The load is lower than the minimum load. Install a heating unit
that is within the load limits of the thermostat.
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.

INSSTE402P0711
12
5.Technical specications
Supply voltage:
120/240 VAC, 50/60 Hz
Minimum electrical current with a resistive load:
1.2 A
300 W to 240 VAC
150 W to 120 VAC
Maximum electrical current with a resistive load:
16.7 A
4000 W to 240 VAC
2000 W to 120 VAC
Range of temperature:
0°C to 40°C (32°F to 99°F)
Temperature display resolution:
0.5°C (0.5°F)
Range of the temperature set points:
3°C to 30°C (37°F to 86°F)
Temperature set point increments:
0.5°C (1°F)
Storage:
-20°C to 50°C (-4°F to 120°F)
Certication:
cCSAus
Limited warranty
This unit has a 3 years warranty. If at
any time during this period the unit be-
comes defective, it must be returned to
its place of purchase with a copy of the
invoice, or simply contact our customer
service department (with a copy of the
invoice in hand). In order for the warran-
ty to be valid, the unit must have been
installed and used according to instruc-
tions. 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 dis-
connection, transport, and installation.
Customer service
Stelpro Design inc.
1041, Parent Street
Saint-Bruno-de-Montarville (Quebec)
J3V 6L7 Canada
Email: [email protected]
Web site: www.stelpro.com