Stelpro STE402NP Bedienungsanleitung

INSSTE402NP1010

“STE402NP”

Electronic thermostat

User’s guide

www.stelpro.com

For further information or to consult this guide online,

please visit our Web site.

INSSTE402NP1010

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 qualiﬁed electrician, according to the

electric 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 load

limits speciﬁed. Protect the heating system

with the appropriate circuit breaker or fuse.

You must regularly clean dirt accumulations

on the thermostat. Do NOT use ﬂuid to clean

thermostat air vents

1.Description

The electronic thermostat STE402NP can be

used to control electric heating units such as

electric baseboards, convectors, or aerocon-

vectors. It keeps the temperature of a room at

the requested set point with a high degree of

accuracy. This product is designed for instal-

lations with electrical current - with a resistive

load - ranging from 1.2 A to 16.7 A (150 to

2000 W at 120 VAC, 260 to 3475 at 208 VAC

and 300 to 4000 W at 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, 3475 W @

208 VAC and 2000 W @ 120 VAC);

•electrical current lower than 1.2 A with a

resistive load (300 W @ 240 VAC, 260 W @

208 VAC and 150 W @ 120 VAC);

•inductiveload(presenceofacontactorora

relay); and

•centralheatingsystem.

Parts supplied:

•one(1)thermostat;

•two(2)mountingscrews;

•two (2) solderless connectors suitable for

copper wires.

Note:

This handling description is printed prior to product

development. When a part of the product speciﬁ-

cation must be changed to improve operability or

other functions, priority is given to the product

speciﬁcation itself. In such instances, the instruc-

tion 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.

INSSTE402NP1010

2.Installation

Selection of thermostat location

The thermostat must be mounted on a con-

nection box on a wall facing the heating unit,

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:

•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 ﬁreplace or any other heat

source;

•closeorinfrontofanairoutlet;

•closetoconcealedductsorachimney;and

•in a location with poor air ow (e.g. behind

a door), or with frequent air draft conditions

(e.g. head of stairs).

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 fol-

lowing ﬁgures 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 con-

nectors. Please note that thermostat does

not have polarity.

Two-wire installation

Four-wire installation

INSSTE402NP1010

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). 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.

4. Using a screwdriver, loosen the screw re-

taining the mounting base and front part of

the thermostat. Remove the front part of the

thermostat from the mounting base by tilting

it upward;

5. Align and secure the mounting base to the

connection box using the two screws sup-

plied;

INSSTE402NP1010

3. Operation

Ambient temperature /

Timer

Modes:

Frost free,

Day,

Night,

Fan,

Automatic

Heating

power

used

indicator

Temperature

set point

Button to decrease

set point / timer

Button to increase

set point / timer

Set point

lock

INSSTE402NP1010

Ambient temperature

The ﬁgures displayed above the icon indi-

cate the ambient temperature, ± 0.5 degree.

Temperature can be displayed in degrees Cel-

sius or Fahrenheit (see “Display in degrees Cel-

sius/ Fahrenheit”).

Temperature set point

The ﬁgures displayed above the icon indi-

cate the temperature set point. It can be dis-

played in degrees Celsius or Fahrenheit (see

“Display in degrees Celsius/Fahrenheit”).

To adjust the set point, just

press down the right but-

ton to increase the value,

or the left button to de-

crease it. Set points can

be adjusted by increments

of 0.5°C or 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 maxi-

mum 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.

Day mode and Night mode

The thermostat includes a Day mode and a

Night mode, both of them having their own in-

dependently adjustable 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 standard factory set point

adjustment is 21°C for the Day mode, and 18°C

for the Night mode.

The current Day/Night mode selection is indi-

cated on the display by the

Sun or Moon icon. In order

to manually switch from one

mode to the other, simulta-

neously press down the two

buttons and release them

immediately.

Night mode timer

The Night mode features a timer that automati-

cally 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 automati-

cally 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 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.

INSSTE402NP1010

Night mode timer adjustment procedure

1.If necessary, adjust the Day/Night mode set

points at the desired temperatures. If need-

ed, switch from one mode to the other by si-

multaneously pressing down the two buttons

and releasing them immediately.

2.From the Night mode, simultaneously press

down the two buttons for more than 3 sec-

onds until the icon starts to blink, indicat-

ing that the adjustment of the Night mode

timer is effective. The ﬁgures displayed above

the icon indicate the current adjustment

of the timer.

3.If needed, adjust the timer by pressing down

the right button to increase the value, or the

left 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.

NOTE: The Night mode timer will be auto-

matically reinitialized to the latest re-

corded 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 Automatic mode must be selected.

Automatic mode

The Automatic mode, which is associated to

the Night mode timer, allows alternating be-

tween the Day/Night modes and the two cor-

responding set points over a 24-hour period.

Once activated, this mode allows an automatic

return to the Night mode after 24 hours. The

Automatic mode allows you to deﬁne two peri-

ods in a single day with different set points.

For example, if the Automatic 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 Automatic mode is activated.

The Automatic mode activation should be

made when you want to return to the Night

mode. The normal course of a cycle in the Au-

tomatic 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.

INSSTE402NP1010

Adjustment procedure of the Automatic mode:

1.If necessary, adjust the Day/Night set point at

the desired temperatures. If needed, switch

from one mode to the other by simultane-

ously pressing down the two buttons and

releasing them immediately.

2.From the Night mode, simultaneously press

down the two buttons for more than 3 sec-

onds, until the icon starts to blink, indi-

cating that the adjustment of the Night mode

timer is effective. The ﬁgures displayed above

the icon indicate the current timer ad-

justment.

If needed, adjust the timer by pressing down

the right button to increase the value, or the

left button to decrease it. The Night mode

timer adjustment range is from 1 hour to

23 hours in the Automatic mode. To quickly

scroll through the timer values, press and

hold down the button. NOTE: If you set the

timer to any value exceeding 23 hours, it

will be impossible to activate the Automatic

mode and if it was activated, the Automatic

mode will be deactivated.

3.Activate the Automatic mode by simultane-

ously pressing down the two buttons for at

least 3 seconds. The Automatic mode icon

will appear. If the Automatic mode was al-

ready 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

Automatic mode when a manual change is

made to the Day/Night mode.

INSSTE402NP1010

Frost-free warning

The Snowﬂake 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.

Display in degrees Celsius/Fahrenheit

The thermostat can display the ambient tem-

perature and the set point in degrees Celsius

(standard factory setting) or Fahrenheit.

Selection procedure for degree Celsius/Fahr-

enheit display

1.From the Day mode, simultaneously press

down the two buttons for more than 3 sec-

onds until the icon starts to blink;

2.Press down the right button to switch from

the degrees Celsius to the degrees Fahren-

heit, and conversely. The degree Celsius or

Fahrenheit symbol will be displayed;

3.When the adjustment is completed, release

the buttons and wait for 5 seconds to exit the

adjustment function.

Fan mode

When the thermostat is used to control a heat-

ing 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.

Adjustment procedure for the Fan mode

1.From the Day mode, simultaneously press

down the two buttons for more than 3 sec-

onds, until the icon starts to blink;

2.Press down the left button to activate or de-

activate the Fan mode. The Fan icon will be

displayed or not, as applicable;

3.When the adjustment is completed, release

the buttons and wait for 5 seconds to exit the

adjustment function.

INSSTE402NP1010

Lock option

It is possible to impose a maximum tempera-

ture set point by activating this mode. Then, it

becomes impossible to exceed this set point,

regardless of the current mode (Day/Night).

However, it is still possible to lower the set

point at your discretion. All the other functions

remain unchanged. To unlock the set point, you

must cut off the power supply of the thermostat

for security purposes.

Locking procedure

1.From the Day mode, adjust the set point at

the maximum desired value;

2.From the Day mode, simultaneously press

down the two buttons for more than 10 sec-

onds, until the Lock icon displays (note that

the icon will also blink after 3 seconds);

3.Release the buttons. The thermostat is now

locked.

Unlocking procedure

1.Cut off the power supply of the thermostat at

the electrical panel;

2.Wait at least 20 seconds;

3.Restore the power supply of the thermostat

at the electrical panel;

4.The Lock icon is blinking on the thermostat

display, meaning that it is possible to unlock

the thermostat;

5.While the Lock icon is blinking, simultane-

ously press down the two buttons for more

than 10 seconds, until the Lock icon disap-

pears;

6.Release the buttons. The thermostat is now

unlocked.

NOTE: If the thermostat isn’t unlocked within

5 minutes after the restoration of the power

supply, the Lock icon will stop to blink and

it will be impossible to unlock the thermostat

unless cutting off the power supply again.

Heating power indicator

The level of power used to maintain the tem-

perature at the set point is expressed as a

percentage indicated by the number of bars in

the thermometer displayed. The heating power

used is displayed as follows:

0 bar = no heat

1 bar = 1% to 25%

2 bars = 25% to 50%

3 bars = 50% to 75%

4 bars = 75% to 100%

Power failure

In the case of a power failure, the adjustments

are automatically saved and recovered when

power is restored. Note that the Day/Night

mode is recovered only if the Automatic mode

was previously deactivated. Otherwise, the

thermostat comes back in Day mode and the

Automatic mode icon blinks, meaning that the

Automatic mode was previously activated and

that it is now deactivated. Blinking will stop as

soon as a button is pressed down.

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