Stelpro STCNP - 5mA User manual
INSSTCNP5MA0612
“STCNP - 5mA”
Smart non programmable electronic
thermostat for heating cable
User’s Guide
www.stelpro.com
For further information or to consult this guide online,
please visit our Web site.
INSSTCNP5MA0612
WARNING 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 manufac-
turer deems no further responsibility for this
product. Moreover, the following instruc-
tions must be adhered to in order to avoid
personal injuries or property damages,
serious injuries and potentially fatal elec-
tric shocks. All electric connections must be
made by a qualified 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 specified
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 fluid to clean
thermostat air vents. Do NOT use where ex-
posed to water.
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INSSTCNP5MA0612
1. Description
The STCNP non programmable electronic thermostat can be
used to control heating floors 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 floor ( 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
floor at any time and when the temperature of the ambient
air can be high without causing discomfort. For example, in
a bathroom.
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 ambi-
ent air temperature (without fluctuation). 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 out-
side temperature) and other heat sources such as a central
heating system, a fireplace, 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);
•inductiveload(presenceofacontactororrelay);and
•centralheatingsystem.
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INSSTCNP5MA0612
Parts supplied:
•one(1)thermostat;
•two(2)mountingscrews;
•four(4)solderlessconnectorssuitableforcopperwires;
•one(1)oorsensor.
2. Installation
Thermostat selection and sensor location
The thermostat must be mounted on a connection box, at
around 1.5 m (5 feet) above the floor 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:
•closetoawindow,onanexternalwall,orclosetoadoor
leading outside;
•exposeddirectlytothelightorheatoftheSun,alamp,a
fireplace or any other heat source;
•closeorinfrontofanairoutlet;
•closetoconcealedductsorachimney;
•inalocationwithpoorairow(e.g.behindadoor),orwith
frequent air drafts (e.g. head of stairs).
To install the sensor, refer to the installation guide of your
heating floor.
Thermostat mounting and connection
1. Cut off power supply on lead wires at the elec-
trical 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.
3.Using a screwdriver, loosen the screw retaining the mount-
ing base and front part of the thermostat. Remove the front
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INSSTCNP5MA0612
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 us-
ing the “Four-wire installation” figure, and using the sup-
plied 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 heat-
ing cable (refer to the drawings displayed on the back of
the thermostat). For connections with aluminum wires, you
must use CO/ALR connectors. Please note that thermo-
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INSSTCNP5MA0612
stat wires do not have polarity, meaning that any wire can
be connected to the other. Then, connect the wires of the
floor temperature sensor at the indicated location behind
the thermostat.
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).
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INSSTCNP5MA0612
3. Operation
First Start-up
At the first 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 floor temperature is limited to 28°C.
Maximum oor temperature limitation
At any time, the floor temperature (both in and modes)
is maintained at less than 28°C (82°F) in order to avoid over-
heating caused by an excessive heating request, which could
damage some materials or be detrimental for health.
TEST
Smart mode
Security mode
Night mode
Day mode
Red Indicator
(GFCI Test)
GFCI button
(Ambient mode)
(Floor mode)
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INSSTCNP5MA0612
Temperature set points
The figures beside the icon indicate the temperature set
points (both in and modes). They can be displayed in
degrees Celsius or Fahrenheit (see “Display in degrees Cel-
sius/Fahrenheit”).
Out of any adjustment mode, press down the + button to in-
crease 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 Smart modes, the mode set
points can range between 3 and 35°C and can only be ad-
justed 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 adjust-
able and recorded set point. When switching from one mode
to the other, the system will automatically use the tempera-
ture set point corresponding to the Day/Night mode selected.
The and temperature are displayed by the figures un-
der the and icons, and the temperature set points are
displayed by the figures beside the icon, both in degrees
Celsius or Farenheit. The standard factory set point adjust-
ment 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.
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INSSTCNP5MA0612
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. You
can switch from the mode to the mode without affect-
ing the timer adjustment.
For example, if you want a night temperature lower than the
day temperature, both Day/Night modes set points will first
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 figures 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 but-
ton.
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
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INSSTCNP5MA0612
Day mode to the Night mode. It is not necessary to read-
just 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.
Smart mode
The Smart mode, which is associated to the Night mode tim-
er, 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 define
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 operat-
ing 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.
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