Computherm S300 Operating Instruction

Operating instruction

COMPUTHERM

S300

Wi-Fi Thermostat

COMPUTHERM

S Series

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TABLE OF CONTENTS

1. A general description of the thermostat 3

2. Important warnings and safety recommendations 5

3. Meanings of the LED signals of the thermostat 8

4. Putting the apparatus into operation 9

4.1. Downloading and installing mobile application 9

4.2. Connecting the thermostat to the user account and establishing contact

between the thermostat and the Wi-Fi network 11

5. Use of the thermostat and application, a description of

functions and services 17

6. Recommendations for the use of the thermostat 24

6.1. Remote control for central heating, heaters and infrared heating panels 24

6.2. Programmed operation and remote control of other electric devices (e.g.

watering pumps, refrigerators) 28

7. Practical advices 30

8. Technical data 33

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1. A GENERAL DESCRIPTION OF THE THERMOSTAT

COMPUTHERM

S300 Wi-Fi thermostat is an apparatus that can be

controlled by a smart phone via the Internet, and we recommend it
primarily as a supplement for an existing central heating systems and
other electric devices to enable remote control. When it is ON, the net-

work voltage appears on the thermostat terminal, and below the maximum
loadability limit of its output relay the thermostat is suitable to control any
connected electric device (e.g. gas boilers, infrared heating panels, etc.).
The apparatus can be easily controlled manually on the spot or by a smart
phone via the Internet and its operating condition (ON/OFF) can be checked
continuously. In addition, the apparatus enables automatic control based on

the temperature and humidity. Several thermostats installed at di󰀨erent

places can be registered into the same user account and can be controlled
(even from the same smart phone). For easy handling, devices belonging

to the same place of use can be arranged into separate groups (e.g. at or

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holiday home). Devices that have been put into service can be controlled
by more than one smart phone with the help of „Share” function.

A heating system controlled by an existing thermostat and complemented
with a

COMPUTHERM

S300 Wi-Fi thermostat can be made remotely con-

trollable by means of a smartphone via the Internet.

We o󰀨er the installation of a supplementary

COMPUTHERM

S100 Wi-Fi

sensor centre to those who wish to control their

COMPUTHERM

S300 ther-
mostat based on the temperature/humidity measured in another room via
wireless means. For example, with the installation of the

COMPUTHERM

S100 Wi-Fi sensor centre a boiler connected to a

COMPUTHERM

S300
thermostat in the basement of a house can be easily controlled by the tem­perature measured in the sitting room upstairs or freezing can be prevented
with out having to lay a cable.

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This product is especially useful when you do not use your at or house

according to a predetermined schedule, you leave your home for an un­certain period of time or you wish to control or check the heating of your
holiday home remotely during the heating season.

The functions and services of the apparatus and recommendations
for its use are described in detail in Chapters 5 and 6.

2. IMPORTANT WARNINGS AND SAFETY RECOM-

MENDATIONS

• Before starting to use the apparatus, please study carefully the instruc-

tions for use and follow strictly the instructions therein.

• The thermostat was designed for business or household (not industrial)

use and can be used to control any electric device whose performance
does not exceed 3.6 kW (loadability: 230 V AC; 50-60 Hz; 16 A).

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• When it is ON, network voltage appears on the thermostat terminal,

contrary to thermostats with conventional potential free relay output.

• Before starting to use the thermostat, make sure that the Wi-Fi network

is reliably accessible at the place where you intend to use the apparatus.

• This apparatus has been designed for indoor use. Do not use it in a

humid, dusty or chemically aggressive environment.

• This apparatus is a thermostat that can be controlled via a wireless

Wi-Fi network. To prevent jamming, keep it away from such electric
equipment which may interfere with wireless communications.

• The manufacturer will assume no responsibility for any direct or in-

direct damages or income losses caused by/during the use of the
product.

• The apparatus will not work without power supply but in automatic

mode it memorizes the settings and resumes operation without any

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intervention after the power supply is restored (the power outage is
eliminated). In manual mode please check - and modify if required –
the setting of the thermostat according to the needs and specify its
position to be set after the power outage is eliminated and power sup­ply is restored (turned on/o󰀨, last previous condition; see Point “g” in
Chapter 5). If you intend to use the apparatus in an environment where
power outages occur frequently, for safety purposes we propose you
to control proper operation of the thermostat regularly.

• Before actually starting to control the device connected to the ther-

mostat, make sure that the device is perfectly functioning when it
is controlled by the thermostat and it can be operated reliably.

• The software of the thermostat and the mobile application is con-

stantly upgraded and updated. For proper operation please check
regularly whether there is any accessible software or mobile applica­tion update in menu item „…” / „Setting” and always use their latest

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version! Due to constant updates it is possible that some functions of
the apparatus and the applications operate and appear in a way other
than described in these instructions for use. (The service provider will

send a notication of the accessible updated software).

3. ME ANINGS OF THE LED SIGNALS OF THE

THERMOSTAT

The operating condition of the thermostat is indicated by one red and
one blue LED light as described below:

• Normal operation of the device is indicated by a solid blue LED light.

• The device indicates tuning with the Wi-Fi network as follows:

- the blue LED is ashing briskly or

- the blue LED blinks three times then illuminates steadily for a short
time and this process is repeated.

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• When the blue LED ashes once for a short time every few seconds

then the connection between the thermostat and the Wi-Fi network
has not been established.

• When the blue LED ashes twice for a short time every few seconds then

the connection between the thermostat and the Wi-Fi network has been
established but the connection to the central server was unsuccessful.

• When the blue LED ashes once for ~1 second every few seconds then

the thermostat has been connected to the Wi-Fi network and the central
server but the connection to the user account was unsuccessful.

• The ON position of the thermostat terminal is indicated by steady
illumination of the red LED beside the blue LED.

4. PUTTING THE APPARATUS INTO OPERATION

4.1. Downloading and installing mobile application

The thermostat can be controlled from devices using the Android or iOS op-

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erating system by means of an application called COMPUTHERM S Series.
a) Download the free COMPUTHERM S Series application from App

Store or Google Play store to the device (e.g. smart phone or tablet)

you intend to use to control the thermostat. The application is acces­sible through the below link and QR code:

 http://quantrax.hu/computherm-wi--termosztatok/

b) After the application has been installed, register a user account by

means of your e-mail address. During the registration process give
the e-mail address you wish to use then tap the „NEXT” button.
On the appearing page tap the „SEND” button and the application
will send your e-mail address to the central server which will send
a 4-digit validation code to the e-mail address given within a few

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minutes. Enter this 4-digit validation code into the line „VERIFI-
CATION CODE”. Following this, give a password composed of at
least 8 characters. When you are ready, click twice on the „REGIS-
TER” button and enter into your user account.

Following this, the mobile application is ready for use.

4.2. Connecting the thermostat to the user account and es-

tablishing connection between the thermostat and the
Wi-Fi network

The apparatus should be connected to the user account di󰀨erently from

devices which are using the Android or iOS operating system.

4.2.1. In case of devices using the Android operating system you
can connect the thermostat to the user account and the Wi-Fi net­work chosen by means of the following steps:

a) Enable the Wi-Fi connection on your device using the Android oper-

ating system.

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b) Connect the thermostat to the mains power source through the „N”,

„L” and „E” connection points indicated on the apparatus in the direct
vicinity of the Android-operated device and the Wi-Fi router selected

then wait for ~10 seconds. The Wi-Fi network selected must have

Internet access.

c) Press and hold down the push button on the thermostat for around

5 seconds. The LED on the apparatus will blink three times then illu-

minates steadily for a short time and this process is repeated. Press

and hold down the button again for around 5 seconds and the blue
LED starts to blink briskly indicating that the apparatus is in tuning
mode (should you encounter any problem during the further steps
of tuning then we propose you to reset the router to the factory
default and attempt tuning again. Another way to attempt tuning:
press only once and hold down the button on the apparatus for a
longer time and the blue LED on the apparatus blinks 3 times then
illuminates steadily for a short time and this process is repeated.

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This blinking indicates the alternative tuning mode).

d) On the Android device open application „COMPUTHERM S Series”

and click on „+” at the bottom of the screen then on the „Next” button.

e) In the application give the name and password of the Wi-Fi network to which

the thermostat is to be connected then click on the „Next” button again.

f) Following this, the Android operated device will automatically nd the

thermostat in its environment and connects it to the user account
and establishes connection between the thermostat and the Wi-Fi
network selected.

g) As a last step enter a name for the thermostat (e.g. daytime thermostat)

so that it can be distinguished from any possible devices easily then click
on the „Submit” button. Now the thermostat can be seen with the name
given in the application. Then you can connect the device to be con­trolled to the thermostat (see Chapter 6 for detailed instructions), which
becomes remotely controllable this way. Please make sure that neither

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the device to be controlled nor the thermostat are connected to the
mains power while the device is connected to the thermostat.

4.2.2. In case of a device using the iOS operating system you can

connect the thermostat to the user account and the Wi-FI network
chosen by means of the following steps:

a) Connect the thermostat to the mains power source through the „N”, „L”

and „E” connection points indicated on the apparatus in the immediate
vicinity of the iOS-operated device and the Wi-Fi router selected then wait

for ~10 seconds. (The Wi-Fi network selected must have Internet access).

b) On your iOS device open the „COMPUTHERM S Series” application

then tap „+” at the bottom of the screen then the „Next” button.

c) Pressing the „Home” button of the iOS device send the application

to the background then enter into menu item „Settings/Wi-Fi net-

works”. Press and hold down the push button on the thermostat for

around 5 seconds. The blue LED on the apparatus blinks three times

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then illuminates steadily for a short time and this process is repeated.

Press and hold down the button again for around 5 seconds and the

blue LED starts to blink briskly indicating that the apparatus is in tuning
mode. At this point the „ITEADxxxxxx” Wi-Fi network should appear
on the list of Wi-Fi networks. (Should you encounter any problem dur­ing the further steps of tuning than we propose you to reset the router
to the factory default and attempt tuning again. Another way to attempt
tuning: press only once and hold down the button on the apparatus for
a longer time and the blue LED on the apparatus blinks 3 times then
illuminates steadily for a short time and this process is repeated. This
blinking indicates the alternative tuning mode).

d) Out of the list of Wi-Fi networks o󰀨ered by the device select the net-

work named „ITEADxxxxxx” and give its password: 12345678. (If
the phone does not allow connection to the ITEADxxxxxx Wi-Fi net­work then delete Wi-Fi connections saved at the given place because

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the phone tries to make connections to them automatically).Once the
iOS device is connected to the Wi-Fi network of the thermostat, exit from
the „Settings” menu.

e) On your iOS device open again application „COMPUTHERM S Se-

ries” then tap the „Next” button at the bottom of the page.

f) On the next screen give the name and password of the Wi-Fi network

to which the socket is to be connected then tap the „Next” button
again. Following this, the iOS device will connect the thermostat to
the user account and establishes connection between the thermostat
and the Wi-Fi network selected.

g) As a last step enter a name for the thermostat (e.g. daytime ther-

mostat) so that it can be distinguished easily from the other devices
connected to the user account and acknowledge settings by tapping
the button “Added successfully!” then „OK” that appears after-
wards. Now the thermostat can be seen with the name given in the
application. Then you can connect the device to be controlled to the
thermostat (see Chapter 6 for detailed instructions), which becomes

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remotely controllable this way. Please make sure that neither the

device to be controlled nor the thermostat are connected to the
mains power while the device is connected to the thermostat.

5. USE OF THE THERMOSTAT AND APPLICATION,

DESCRIPTION OF FUNCTIONS AND SERVICES

Once you have successfully established a connection between the ther­mostat and the Wi-Fi network selected (which must have the Internet
access) and connected the thermostat to your user account, you can
control it remotely with the help of the application.

To enable remote control, in the application log in to your user account with
your user name (phone number/e-mail address) and your password. By
means of the menu items that can be opened at the top of the main screen
of the application you can arrange the devices into groups („Group”) then
you can select those you wish to see together on the main screen.

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The settings of the user account and the application can be modied and

the application can be updated in settings ( ) menu. You can return to the
main menu with the icon showing four squares ( ).

The Andoid application has a widget functionality, with which the basic func­tionalities of the devices connected to the user account can be accessed
directly from the home screen of the Android device.
The thermostat will continue its pre-set function even in the absence of the
Internet access. Besides, it will continue its pre-set function after the power
is restored following a mains supply failure (power outage), except if the
Internet is not accessible any longer when power supply is restored.
If, for any reasons, in the future you intend to control you apparatus through

another Wi-Fi network or from another user account then rst you have to
remove it from this account with “Delete” or using the icon

then put the
thermostat into service again by means of the steps described in Chapter 4.
Attention! In the setting menu of the device the software of the thermo-

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stat can also be updated. For proper operation please check regularly
whether a software update is available and always use the latest version!

The thermostat has the following functions and services:
a) Manual on/off control: press the push button on the thermostat

for a short time.

b) Manual on/o󰀨 control by means of the application: tap „OFF”/„ON” button.
c) Timed on/o󰀨 control at a preset point of time with the application: tap

the „Timing/Timer” button then specify settings of the function.

d) Timed on/o󰀨 control with the help of the application after a certain

period of time has elapsed: tap „Countdown” button then specify
settings of the function.

e) Repeated timed on/o󰀨 control with the help of the application after a

certain period of time has elapsed: tap „...” then „Loop timer” button
then specify settings of the function.

f) Automatic mode: tap „Auto/Manual” button then specify the param-

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eter concerned (temperature or humidity) and the associated condi­tions (e.g. „Higher than 22°C” or „Lower than 21°C” and ON/OFF).
Settings can be conrmed by tapping the „OK” button. You can return
to manual mode by tapping the „Auto/Manual” button again.

g) You can get access to settings of the device by pressing „...” then

the „Setting” button. Here you can alter the name of the device or, in
case of switching, activate the vibration of the smart phone or update
the software. In addition, you can specify the position of the device to

be set (turned on/o󰀨, last previous condition) once the power supply

is restored (e.g. after a power outage). For proper operation please
check regularly whether there is any accessible software update and
always use the latest version!

h) You can share the device with other user accounts (e.g. those of

family members/colleagues) by tapping the „Share” button. Sharing
requires that the other party also registers a user account, enters into

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this account and stays online while sharing steps are carried out.

i) Coordinated control of several devices with function „Scene”: Coor-

dinated control of the devices connected to your user account can be
done with function „Scene”. You can manually control several devices

simultaneously or, based on pre-set parameters, turn on/o󰀨 one or more

COMPUTHERM

Wi-Fi devices that are not equipped with temperature

sensor (e.g.

COMPUTHERM

S200 Wi-Fi sockets) with the help of the

COMPUTHERM

S300 Wi-Fi thermostat as a master device.

The „Scene” function is accessible from the main screen of the appli-

cation by tapping icon „...” then menu item „Scene”. After entering into this
function you can create a new switch command by tapping the „+” button at
the bottom of the screen, and previous settings also appear on this screen.

The creation of the switch command is composed of four steps:

• A name should be given to the switch command (e.g. Turn on the

heating or Turn o󰀨 the heating)

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• After tapping the „+” button located beside menu item „When it meets”
you have to select the type of the switch command: manual start-up
(„Tap to run”) or control from the master device („Master device”).

• When „Master device” control is chosen, the program o󰀨ers the
device(s) connected to the user account (e.g. the

COMPUTHERM

S300 Wi-Fi thermostat), out of which one should be chosen to be a

master device. Then out of the parameters o󰀨ered for control you have

to choose the one (e.g. temperature) based on which you intend to
control the other device (e.g. a

COMPUTHERM

S200 socket). Finally,

you have to give the condition belonging to the parameter (e.g. „≤ 21
°C” or „≥ 22 °C”) then tap the „OK” button to conrm the settings.

• After conrming the parameters having been set, by tapping the „+”
button located beside menu item (Execute) you can choose the type
of switch („ON” or „OFF”) to be performed when the pre-set value is
reached on the selected device(s) (e.g. a

COMPUTHERM

S200 socket).

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• When manual start-up is chosen (Tap to run), several devices can

easily be turned on/o󰀨 simultaneously. This mode is especially

suitable to activate certain electric devices with the push of a single

button (e.g. turning on/o󰀨 lights, opening/closing motorized roller
blinds) when you arrive at or leave your at or holiday cottage.

• When controlling from a master device the thermostat will automatically

execute the commands when the specied conditions are met

therefore in this mode the thermostat is perfectly suited to control the
central heating system (for more details please refer to Sub-chapter

6.1). Function „Scene” is only in operation when each of the two or
more devices connected to the function have the Internet access.

The active „Scene” function overwrites the manual switch com­mands therefore you have to delete or modify the settings of
the „Scene” function if you wish to control, either on the spot
or remotely, e.g. a

COMPUTHERM

S200 socket controlled by the

„Scene” function from a

COMPUTHERM

S300 thermostat.

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6. RECOMMENDATIONS FOR THE USE OF THE
THERMOSTAT

6.1. Remote control for central heating, heaters and infrared
heating panels

Remote control of an existing central heating system is easily feasible if
it is complemented with and controlled by a

COMPUTHERM

S300 Wi-Fi
thermostat. To this end all you have to do is connect the power cable
of the boiler of the central heating system through the terminal of the
thermostat to the electrical network (Figure 1). However, please note

that in this case domestic hot water will not be available in the OFF
state of the Wi-Fi socket.

Therefore, if you control your boiler with a

COMPUTHERM

wireless (RF)
thermostat, we suggest you to connect the power supply of the receiver
unit of the RF thermostat to the

COMPUTHERM

S200 Wi-Fi socket

instead (Figure 2), asthiswayheatingwillbeturnedo󰀨intheOFF

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heating equipment (boiler)

S300

230 V AC

50-60 Hz

Figure 1

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Figure 2

boiler

thermostat

receiver

230 V AC

50-60 Hz

thermostat

S300

230 V AC; 50-60 Hz

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state of the Wi-Fi socket, while domestic hot water is still available.

Then, with remote switch (ON/OFF) of the thermostat via the Internet,
the central heating system can be controlled and switching between
economy and comfort temperatures is feasible.
If the central heating system is operated in an environment where no
risk of frost exists (e.g. a south-facing condominium or holiday home in
commonhold) then it is su󰀩cient to turn OFF the thermostat when leaving
home and turn it ON remotely before arriving home. When it is ON, the

central heating system will heat the at to the temperature preset on the

room thermostat in the usual way.
If the central heating system is operated in an environment where risk of

frost exists we propose you to operate the

COMPUTHERM

S300 thermostat
in automatic mode and set an antifreeze temperature according to Sub­point „f” of Chapter 5 to prevent risk of frost.

If the temperature sensor of the thermostat installed in the vicinity of the

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boiler fails to guarantee that there is no risk of frost in the entire at then

either extend the cables thereof or use a

COMPUTHERM

S200 socket and

a

COMPUTHERM

S300 thermostat for the control of the boiler, and with the
help of the „Scene” function keep the temperature above freezing according
to Sub-point „i” of Chapter 5.

6.2. Programmed operation and remote control for other

electric devices (e.g. watering pump, refrigerator)

Below the loadability limit of the output relay, the thermostat, even with­out a temperature sensor that can be connected thereto, is able to control
any electric device (e.g. a watering pump) remotely.
Connect your electric device to be controlled remotely to the 230 V net­work through the

COMPUTHERM

S300 thermostat and turn on the main

switch of the device to be remote controlled (Figure 3).

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You can switch between automatic and manual control modes by
tapping the „Auto/Manual” button. Choose manual control so that you
can control the operation of the device connected to the thermostat

remotely by turning on/o󰀨 the thermostat manually.

230 V AC

50-60 Hz

pump

(heater / infrapanel etc.)

S300

230 V AC

50-60 Hz

Figure 3

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The timed („Timer”/„Timing”) and repeated timed („Loop timer”)

on/o󰀨 controls make the device particularly suited to control e.g. a

watering pump. By means of the device you can operate the pump
of the irrigation system at pre-set intervals and period of time and,
additionally, you can modify settings remotely (e.g. in case of high
volume of rainfall or a severe draught), and you can check the
operation of the system, and manual remote control of the watering
pump is also feasible.

7. PRACTICAL ADVICES

Problems with the Wi-Fi connection

If you are not able to control the device through the Internet because
it cannot be reached through the application, then the connection
between the device and the server has been broken. This can have

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multiple reasons.
In most of the cases it is caused by the Wi-Fi router. It is practical to
restart the routers from time to time by disconnecting them from the mains

voltage for 2 minutes. In most cases the problems can be xed by this.

If the devices still cannot be controlled after a couple of seconds,
then you should try to reconnect the device to the Wi-Fi network,
as described in Section 4.2. If you nished the connecting steps
successfully but the device still cannot be controlled, then you should
reset the router to the factory default settings, because it is possible
that some settings of the router do not allow the device to connect to
the internet.

You can still switch on/o󰀨 the device manually even when it is not

available through the internet using the button on the device.

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The use of the application

The phone/tablet application is under constant development. It is
advised to update it to the latest version, as the user experience is
continuously enhanced and there can be new functionalities available
in the new versions.

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8. PRODUCT INFORMATION AND TECHNICAL DATA

Trademark:

COMPUTHERM

Model identier: S300

Temperature control class: Class I

Contribution to the e󰀩ciency of seasonal space heating: 1 %

Temperature measuring range: -20 °C – +70 °C
Temperature measurement accuracy: +/- 0.5 °C
Type of the temperature sensor: resistive (ohmic) temperature sensor
Adjustable measuring range: -20 °C – +70 °C
Switch sensitivity: +/- 1 °C (temperature); 1 % RH (humidity)
Humidity measuring range: 0 - 100 %
RH Humidity measurement accuracy: +/- 2 % RH
Adjustable humidity range: 0 - 100 % RH
Supply voltage for the thermostat: 90-230 V AC; 50/60 Hz
Output voltage of the thermostat: 90-230 V AC (identical with the input voltage)

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Protection against environmental impacts: IP51
Output loadability of the thermostat: 16 A (3 A inductive)
Standby power consumption: 0.1 W
Operating frequency: Wi-Fi (b/g/n) 2.4 GHz
Storage temperature: -40 °C … +80 °C
Operating temperature: -20 °C – +70 °C
Permissible relative humidity: max. 80 % without condensation
Dimensions: 115 x 52 x 32 mm
Mass: 85 g

The

COMPUTHERM

S300 type Wi-Fi thermostat complies

with standards RED 2014/53/EU

and RoHS 2011/65/EU.

Manufacturer: QUANTRAX Kft.
H-6726 Szeged, Fülemüle u. 34.
Telephone: [phone] • Fax: [phone]
E-mail: [email protected]
Web: www.quantrax.hu • www.computherm-hungary.hu

Country of origin: China

Copyright© 2018 Quantrax Kft. All rights reserved.