Stelpro STCNP User manual

USER’S GUIDE
STCNP
SINGLE PROGRAMMING ELECTRONIC
THERMOSTAT FOR HEATING FLOORS
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For further information or to consult
this guide online, please visit our website
at www.stelpro.com
INSSTCNP15MA0914
(15mA Version)

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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 electrical 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 specied load
limits. Protect the heating system with the appropriate
circuit breaker or fuse. You must regularly clean dirt
accumulations on or in the thermostat. Do NOT use uid
to clean thermostat air vents. Do not install this thermostat
in a wet location such as a bathroom. The 15mA model is
not made for such an application, as an alternative, please
use the 5mA model.
Note :
When a part of the product specification must be changed to improve
operability or other functions, priority is given to the product specification
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.

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The STCNP single programming electronic thermostat can be
used to control heating oors with electrical current − with a
resistive load − ranging from 0 A to 16 A at 120/208/240 VAC. It
has an easy user interface. It keeps the temperature of a room
( mode) and a oor ( mode) at a requested set point with
a high degree of accuracy.
Floor Mode (factory setting)
This control method is ideal in areas where you want a hot oor
at any time and when the temperature of the ambient air can be
high without causing discomfort.
Ambient Mode / (you only have to press down the A/F
button to switch from one mode to the other)
This control method is ideal when you want a stable ambient air
temperature (without uctuation). Usually, this mode is used in
large and often occupied rooms where temperature variations
can be uncomfortable. For example, in a kitchen, a living room
or a bedroom.
Some factors cause variations in ambient air temperature. They
include large windows (heat losses or gains due to outside
temperature) and other heat sources such as a central heating
system, a replace, etc. In all these cases, the mode will
ensure a uniform temperature.
This thermostat is not compatible with the following
installations:
• electrical current higher than 16 A with a resistive
load (3840 W @ 240 VAC, 3330 W @ 208 VAC and
1920 W @ 120 VAC);
• inductive load (presence of a contactor or relay); and
• central heating system.
DESCRIPTION

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Parts supplied:
• one (1) thermostat;
• two (2) mounting screws;
• four (4) solderless connectors suitable for copper wires;
• one (1) oor sensor.
Thermostat selection and sensor location
The thermostat must be mounted on a connection box, 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;
• in a location with poor air ow (e.g. behind a door), or with
frequent air drafts (e.g. head of stairs).
To install the sensor, refer to the installation guide of your
heating oor.
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. Ensure that the thermostat will
be installed on a junction box located in an
uninsulated wall.
2. Ensure that the air vents of the thermostat are clean and
clear of any obstructions.
INSTALLATION

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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.
5. Route wires coming from the wall through the hole of the
mounting base and make the required connections using
the “Four-wire installation” gure, and using the supplied
solderless connectors. A pair of wires (black) must be
connected to the power source (120-208-240 VAC) and
another pair (yellow) must be connected to the heating
cable (refer to the drawings displayed on the back of the

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thermostat). For connections with aluminum wires, you must
use CO/ALR connectors. Please note that thermostat wires
do not have polarity, meaning that any wire can be connected
to the other. Then, connect the wires of the oor temperature
sensor at the indicated location behind the thermostat.
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).
4-WIRE INSTALLATION

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First Start-up
At the rst start-up, the thermostat is initially in the Day and
modes. The temperature is displayed in degrees Celsius
and the standard factory set point adjustment is 25°C. The
maximum oor temperature is limited to 28°C.
Maximum floor temperature limitation
At any time, the oor temperature (both in and modes)
is maintained at less than 28°C (82°F) in order to avoid
overheating caused by an excessive heating request, which
could damage some materials or be detrimental for health.
Temperature set points
The gures beside the icon indicate the temperature set
TESTA/F
Single
programming
mode
Security mode
Night mode
Day mode
Red Indicator
(EGFPD Test)
EGFPD button
Ambient
temperature
(Ambient mode)
Floor
temperature
(Floor mode)
OPERATION

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points (both in and modes). They can be displayed
in degrees Celsius or Fahrenheit (see “Display in degrees
Celsius/Fahrenheit”).
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 1 degree. To quickly
scroll through the set point values, press and hold down the
button. Both in Manual and Single programming modes, the
mode set points can range between 3 and 35°C and can
only be adjusted by increments of 1°C (from 37 to 95°F; by
increments of 1°F from the Fahrenheit mode). From mode,
the set points can range between 3 and 28°C (from 37 to 82°F).
In Day mode, you can turn off the thermostat by lowering the set
point below 3°C (37°F). The set point value displayed will be --,
and heating system start up will be impossible.
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. 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
and temperature are displayed by the gures under the
and icons, and the temperature set points are displayed
by the gures beside the icon, both in degrees Celsius or
Farenheit. The standard factory set point adjustment is 25°C for
the Day/ mode (21°C from the mode), and 22°C for the
Night/ mode (18°C from the mode).
In order to manually switch from one mode to the other,
simultaneously press down the + and - buttons and release
them immediately.
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

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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. You can switch from the
mode to the mode without affecting the timer adjustment.
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.
Night mode timer adjustment procedure
1. First, switch to the Night mode by simultaneously pressing
down the + and - buttons and releasing them immediately.
2. From the Night mode, simultaneously press down the +
and - buttons for more than 3 seconds until the icon starts
to blink, indicating that the adjustment of the Night mode
timer is effective. The gures that replace the mode
temperature indicate the current adjustment of the timer and
‘‘hrs’’ replaces the mode temperature.
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. The
thermostat will then return to the Night mode.
N.B. 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

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in the Day mode, you must manually return to the Night
mode. If you want to automatically return to the Night
mode, the Single programming mode must be selected.
Single programming mode
The Single programming 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 Single programming mode
allows you to dene two periods in a single day with different
set points.
For example, if the Single programming 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 Single programming mode is activated.
The Single programming mode activation should be made
when you want to return to the Night mode. The normal course
of a cycle in the Single programming 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 Single programming mode:
1. First, switch to the Night mode by simultaneously pressing
down the + and - buttons and releasing them immediately.
2. From the Night mode, simultaneously press down the + and
- buttons for more than 3 seconds, until the icon starts to
blink, indicating that the adjustment of the Night mode timer

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is effective. The gures that replace the ambient temperature
indicate the current timer adjustment. If needed, adjust the
timer by pressing down the + button to increase the value, or
the - button to decrease it. The Night mode timer adjustment
range is from 1 hour to 23 hours in the Single programming
mode. To quickly scroll through the timer values, press and
hold down the button.
N.B. If you set the timer to any value exceeding 23 hours, it will
be impossible to activate the Single programming mode
and if it was activated, the Single programming mode will
be deactivated.
3. Activate the Single programming mode by simultaneously
pressing down the + and - buttons for at least 3 seconds.
The icon will appear. If the Single programming 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.
N.B. It is always possible to manually change the Day/Night
mode during a 24-hour cycle. In all cases, at the end of the
24-hour cycle, the thermostat will return to the Night mode
and start a new cycle. It is thus not necessary to readjust
the Single programming mode when a manual change is
made to the Day/Night mode. If the thermostat is set off
(--), the Single programming mode will be deactivated.
When the power is restored after a power failure for
example, the Single programming mode is deactivated
and its corresponding icon is blinking. The icon will stop to
blink as soon as you will press down a button.
Display in Degrees Celsius/Fahrenheit
The thermostat can display the ambient temperature and
the set point in degrees Celsius (standard factory setting) or
Fahrenheit.

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Adjustment procedure for degrees Celsius/Fahrenheit display.
1. To switch from the degrees Celsius to the degrees
Fahrenheit, and conversely, the thermostat must be from
the Day mode. If so, simultaneously press down the + and -
buttons for more than 3 seconds until the icon blinks.
2. Press down the + button to switch from the degrees Celsius
to the degrees Fahrenheit, and conversely. The degree
Celsius or Fahrenheit symbol is displayed.
3. When the adjustment is completed, do not press down any
button during 5 seconds to exit the adjustment function.
/ Mode
To switch from the mode to the mode, or conversely,
press down the A/F button (when you are not in any adjustment
mode). The previous temperature set point of this mode will be
restored.
Safe mode
If the thermostat fails to detect the presence of a oor sensor, it
will automatically revert to mode at a setpoint of 21°C. (with
a maximum set point temperature of 24°C)
Sensor Selection
If you want to use the STCNP thermostat of Stelpro with a
temperature sensor already installed in the oor (other than
the sensor supplied with this thermostat), you must contact the
Stelpro customer service to validate the compatibility between
the sensor and the thermostat. You must know the serial
number and name of the installed sensor.
Temperature Control
The thermostat controls the / temperature (according
to the / mode) with a high degree of accuracy. When
the heating starts or stops, it is normal to hear a “clic” sound. It
is the noise of the relay which opens or closes, as applicable.

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Backlighting
The screen lights up when you press down a button. If you
do not press down any button for more than 15 seconds, the
screen turns off.
N.B. If you press down the + or - button once when the backlight
is off, it will light up without changing the set point value.
The set point value will change only if you press down one
of these buttons again.
Equipment Ground-fault Protection Device (EGFPD)
The thermostat has an integral Equipment Ground Fault
Protection Device (EGFPD). It can detect a leakage current of
15 mA. If a defect is detected, the EGFPD device lights up,
and both screen and heating system circuit are deactivated.
The EGFPD can be reinitialized either by pressing down the
Test button or by disconnecting the thermostat at the electrical
panel.
Equipment Ground-fault Protection Device (EGFPD) verification
It is important to verify the EGFPD installation and operation on
a monthly basis.
EGFPD verification procedure
1- Increase the temperature set point until the heating power
bars are displayed (displayed in the bottom-right hand corner
of the screen).
2- Press down the Test button.
3- The following two cases can occur:
a) Successful test: The red indicator of the thermostat lights
up. In this case, press down once again the Test button to
reinitialize the EGFPD, the red indicator turns off.
b) Failed test: The red indicator does not light up and the
entire display blinks during 5 seconds. In this case,
disconnect the heating system at the electrical panel and
call Stelpro’s customer service.

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Security mode
This mode imposes a maximum temperature set point which
is impossible to exceed regardless of the mode in progress.
However, it is still possible to lower the set point at your
discretion. Please note that when the Security mode is
activated, it is impossible to switch from the mode to the
mode, and conversely.
Procedures to activate Security mode.
1. To activate the Security mode, the thermostat should be in
Day mode. Exit any adjustment mode to 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 software version and date are displayed.
Continue to press down these buttons).
3. After 10 seconds, the icon is displayed indicating that the
Security mode is activated. Then, release the buttons.
Procedures to deactivate Security mode.
1. To deactivate the Security mode, cut off the power supply
of the thermostat at the electrical panel and wait at least
20 seconds.
2. Restore the power supply to the thermostat. The icon will
blink during a maximum of 5 minutes, indicating that you can
deactivate the Security mode.
3. In Day mode, simultaneously press down the + and - buttons
for more than 10 seconds. The icon will then be hidden
indicating that the Security mode is deactivated.
Parameter backup and power failures
The thermostat saves some parameters in its nonvolatile
memory in order to recovere them when power is restored
(e.g. after a power failure). These are the four set points (Day/
Night/ / ), the Single programming mode, the Security

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mode, the maximum set point of the Security mode, the
Celsius/Fahrenheit mode, the remaining time of the timer and
the maximum oor temperature. These parameters are saved
every minutes when a change occur, except for the Day/Night
mode and the remaining time of the timer, which are saved only
if the Single programming mode was not activated.
Please note that the Single programming mode is not
automatically reactivated when the power is restored, the
icon blinks to indicate that this mode was activated before the
power failure and that is now deactivated. Moreover, when the
power is restored, the Day/Night mode is recovered only if the
Single programming mode was deactivated before. If not, the
Day mode is automatically reactivated. The Security mode is
also reactivated if it was activated before the failure. However,
its icon blinks for 5 minutes and you can deactivate this mode
by simultaneously pressing down the + and - buttons for 10
seconds. The Security mode stays activated if you don’t follow
this process and the icon stops blinking.

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PROBLEM DEFECTIVE PART
OR PART TO CHECK
The thermostat is hot.
• In normal operating conditions, the
thermostat housing can reach nearly
40°C at maximum load. It is normal
and will not affect the 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 and make sure the red
indicator is not lit. 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.
The red indicator lights up
frequently. • Contact customer service.
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*, E2**
or E3***.
• Faulty thermal sensor. Contact customer
service.
Weak luminosity of the display.
• Possibility of a bad contact. Check
thermostat wirings. Refer to the
installation section.
* E1: Faulty ambient exterior sensor (open circuit) - written in the ambient section
** E2: Faulty interior sensor (open circuit) - written in the ambient section
*** E3: Faulty oor sensor (open circuit) - written in the oor section
N.B. If you do not solve the problem after checking these points, cut off the
power supply at the main electrical panel and contact customer service
(consult our Web site to obtain the phone numbers).
TROUBLESHOOTING

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Supply voltage:
120/208/240 VAC, 50/60 Hz
Maximum electrical current with a resistive load:
16 A
3840 W @ 240 VAC
3330 W @ 208 VAC
1920 W @ 120 VAC
Temperature display range:
0 °C to 40 °C (32 °F to 99 °F)
Temperature display resolution:
1 °C (1 °F)
Temperature set point range (Ambient Mode):
3 °C to 35 °C (37 °F to 95 °F)
Temperature set point range (Floor Mode):
3 °C to 28 °C (37 °F to 82 °F)
Temperature set point increments:
1 °C (1 °F)
Storage:
-30 °C to 50 °C (-22 °F to 122 °F)
Certification:
cETLus
TECHNICAL SPECIFICATIONS

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LIMITED WARRANTY LIMITED WARRANTY LIMITED
WARRANTY LIMITED WARRANTY LIMITED WARRANTY
WARRANTY LIMITED WARRANTY LIMITED WARRANTY
LIMITEDWARRANTY
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 according 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 disconnection,
transport, and installation.
Email : [e-mail]
Website : www.stelpro.com
LIMITED WARRANTY LIMITED WARRANTY LIMITED
STELPRO DESIGN INC. | Saint-Bruno-de-Montarville | Québec | J3V 6L7