Stelpro STE241 Bedienungsanleitung

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For further information or to consult this guide online, please visit

our website at www.stelpro.com

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 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.

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

ELECTRIC RELAY

WITH TRANSFORMER

ELECTRIC RELAY

WITHOUT TRANSFORMER

POWER

WIRES

SIGNALS

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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