Stelpro STE241 Manuel utilisateur
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USER’S GUIDE
STE241
LOW VOLTAGE
ELECTRONIC THERMOSTAT (24V)
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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.
according to the electric and building codes effective in your region.
Do NOT connect this product to a supply source other than 24 VAC and
the appropriate circuit breaker or fuse. You must regularly clean dirt
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 specication must be changed to improve operability
or other functions, priority is given to the product specication 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.
WARNING
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The STE241 low voltage electronic thermostat (24 V) is designed to control relays
(electronic or not). The allowed resistive maximum load is 12 W at 24 V (0.5 A).
Then, relays (electronic or not) connected to the thermostat can control electric
baseboards with or without fans, convectors, fan heaters and electric furnaces.
This thermostat can be connected to Stelpro relays (with or without transformers).
Moreover, the triac contact is really quiet.
This thermostat is not compatible with the following
installations:
• resistive load of more than 12 W at 24 VAC (0.5 A)
Parts supplied:
• one (1) thermostat
• two (2) mounting screws
Selection of thermostat location
The thermostat must be mounted 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
• in a location with poor air ow (e.g. behind a door), or with frequent air drafts
conditions (e.g. head of stairs).
DESCRIPTION
INSTALLATION
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Thermostat mounting and connection
1. Ensure that the air vents of the thermostat are clean and clear of any
obstruction.
2. 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.
N.B. The following photos show a connection box installation as a reference only.
A connection box is not necessary or required.
3. Align and secure the mounting base using the two screws supplied.
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4. Connect the wires coming from the 24 VAC power source following the
appropriate diagram below:
One baseboard with a STELPRO RE-153T electronic relay with a 24 VAC
transformer.
Two baseboards, with one connected to a Stelpro RE-153T electronic thermostat with
a 24 VAC transformer, and with the second baseboard connected to a Stelpro RE-153
electronic thermostat without a 24 VAC transformer.
BLACK BLACK
BLACK
BLACK
ELECTRIC RELAY
WITH TRANSFORMER
ELECTRIC RELAY
WITHOUT TRANSFORMER
POWER
WIRES
SIGNALS
BLUE
BLUE
BLUE
RED
WHITE
BLACK BLACK
ELECTRIC RELAY
WITH TRANSFORMER
POWER
WIRES
SIGNALS
BLUE
RED
WHITE
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Standard 24 VAC power source (24 VAC transformer)
NOTE: the color of the wires can change according to the electronic relays that
are used. Connection diagrams in this guide are only examples.
5. Reinstall the front part of the thermostat on the mounting base and tighten the
screw at the bottom of the unit.
6. Turn on the power.
7. Set the thermostat to the desired setting (see the following section).
TRANSFORMER
24 VAC
PRIMARY
SECONDARY
CONTACTOR
OR RELAY
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Intial start up
When powering on for the first time, the thermostat is initially set to Day mode
. The temperature is displayed in Celsius and is set at 21 degrees by default.
Temperature set points
The figures 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 top button to increase the value, or the
bottom button to decrease it. Set points can be adjusted by increments of 0.5°C
(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). 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.
OPERATION
Ambient
temperature
timer
Heating
power
used
indicator
Security mode
Single
programming
mode
Top button
Pictograms
Frost-free
warning
Night mode
Day mode
Bottom button
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Day mode and Night mode
The thermostat includes a Day mode and a Night mode , 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 standard factory set
point adjustment is 21°C (70°F) for the Day mode, and 18°C (64°F) for the Night
mode.
The current Day/Night mode selection is indicated on the display by the Sun or
Moon icon. In order to manually switch from one mode to the other, simultaneously
press down the two 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 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 mode 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. If necessary, adjust the Day/Night mode set points at the desired temperatures.
If needed, switch from one mode to the other by simultaneously pressing down
the two buttons and releasing them immediately.
2. From the Night mode, simultaneously press down the two buttons for more than
3 seconds until the Moon icon blinks.
3. If needed, adjust the timer by pressing down the top button to increase the
value, or the bottom 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.
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4. When the adjustment is completed, release the buttons and wait for 5 seconds
to exit the adjustment function.
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 Single
programming mode must be selected.
Single programming mode
The Single programming mode, which is associated with 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 define 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 over. 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. If necessary, adjust the Day/Night set point at the desired temperatures. If
needed, switch from one mode to the other by simultaneously pressing down
the two buttons and releasing them immediately.
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2. From the Night mode, simultaneously press down the two buttons for more
than 3 seconds. If needed, adjust the timer by pressing down the top button to
increase the value, or the bottom 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 the bottom button.
NOTE: 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 two 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.
NOTE: It is always possible to manually change the Day/Night mode during
a 24-hour cycle. However, any manual return to the Night mode will
re-initialize the Night mode timer to the latest value recorded, which
modifies the cycle in progress. 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.
When turning back on after being powered off (because of a power
failure, for example), the Single programming mode is deactivated, and, if
previously activated, the icon will blink. The blinking will stop as soon
as you press down a button.
Display in either degrees Celsius/Fahrenheit
The thermostat can display the ambient temperature and the set point in degrees
Celsius (standard factory setting) or Fahrenheit.
1. From the day mode, simultaneously press down the two buttons for 8 seconds
until the Celsius/Fahrenheit symbol blinks. Release the buttons.
2. Press down the top button to switch from the degrees Celsius to the degrees
Fahrenheit, and conversely. The degree Celsius or Fahrenheit symbol will be
displayed.
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