Computherm E300 User manual

Instruction Manual
COMPUTHERM E300
a programmable digital Wi-Fi thermostat for
radiator and underoor heating systems

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TABLE OF CONTENTS
1. A general description of the thermostat 5
2. Important warnings and safety recommendations 6
3. Information appearing on the display of the thermostat 9
4. Functions accessible in the phone application 10
5. Location of the thermostat 11
6. Connection and installation of the thermostat
and putting it into operation 11
6.1. Connection of the device(s) to be controlled 12
 6.2. Connectingtheoortemperaturesensor 15
 6.3. Connectiontotheelectricalnetwork 16
 6.4. Mountingthethermostat 17
 6.5. Installingtheapplication 18
 6.6. ConnectingthethermostattoaWi-Finetwork 18
 6.7. Connectingthethermostattoauseraccount 19
 6.8 Controllingthethermostatbymultipleusers 20
7. Basic settings 21
 7.1.Renamingthethermostatassignedtotheapplication 21
 7.2.Disablingfurtherconnectionsofthethermostatassigned
  totheapplication  22
 7.3.Deletingthethermostatassignedtotheapplication 22
 7.4.Settingthedayandtime 23
 7.5 Lockingoperatingbuttons  24

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8. Operation-related settings 25
8.1 Selectingthetemperaturesensor   28
 8.2. Settingoortemperaturelimitandcorresponding
  switchsensitivity  29
 8.3 Calibrationofthetemperaturesensor  30
 8.4 Antifreezing 30
 8.5. Memorizingsettingsintheeventofapowerfailure 30
 8.6 Restoringdefaultsetting 31
9. Basic operation of the thermostat 32
10. Switching between ON and OFF positions
and modes of the device 33
10.1.Manualmode  34
10.2.Programmedautomode   35
   10.2.1Descriptionoftheprogrammedmode  35
   10.2.2.Descriptionofthestepsofprogramming 36
   10.2.3.Modifyingtemperatureuntilthenextswitchintheprogram 39
11. Practical advices 39
12. Technical data 42

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1. A GENERAL DESCRIPTION OF THE THER-
MOSTAT
COMPUTHERM E300 Wi-Fi thermostat is a switching device that
can be operated by a smartphone or tablet via Internet, and we
especially recommend it for controlling heating or cooling systems.
It can be easily connected to any gas boiler having a two-wire
thermostat connection point and to any air conditioning apparatus
or electrical apparatus, regardless of whether they have a 24 V
or 230 V control circuit. The device can be easily controlled via
both Internet and touch button interface, and its operating con-
ditions can be checked continuously. The device also facilitates
automatic control on the basis of temperatures and times. Several
thermostats that are put into operation at di󰀨erent locations can be
registered to the same account and controlled. The thermostat has
two potential free relays which switch simultaneously therefore it is
able to control two independent apparatuses.
COMPUTHERM E300 Wi-Fi thermostats can be used to control:
• gas boilers
• an existing heating/cooling system remotely
• electric water heaters
• solar systems
• certain groups of other electric devices

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With the help of the product the heating/cooling system of your at,
house or holiday home can be made controllable from any place
and at any time. This product is especially useful when you do not
use your at or house according to a predened schedule, you
leave your home for an uncertain period of time during the hating
season or you intend to use your holiday home during the heating
season as well.
The two parallel operating relays incorporated into the device
simply ensure that the thermostat can activate or turn on or o󰀨 a
pump and a zone valve (see Figure5), in addition to starting up
the boiler. Thus, using several COMPUTHERM E300 type Wi-Fi
thermostats, a heating system can be easily divided into zones
without a separate zone control system.
2. IMPORTANT WARNINGS AND SAFETY RE-
COMMENDATIONS
• Before starting to use the device, please study carefully the
instructions 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 0.69 kW (loadability: 230
V AC; 50-60 Hz; 3 A [1 A inductive]).

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• 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 device has been designed for indoor use. Do not use it in
a humid, dusty or chemically aggressive environment.
• This device is a thermostat that can be controlled via a wi-
reless 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 possib-
le direct or indirect damages or income losses incurring during
the use of the device.
• The device will not work without power supply, but the ther-
mostat is able to memorize settings. In case of power failure
(outage) it can resume operation without any external inter-
vention after the power supply is restored, provided that this
option has been chosen among settings (see Chapter8). If
you intend to use the device 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connec-
tedtothethermostat,makesurethatthedeviceisper-

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fectlyfunctioningwhenitiscontrolledbythethermos-
tatanditcanbeoperatedreliably.
• The software of the thermostat and the telephone applica-
tion is constantly upgraded and updated. For proper opera-
tion please check regularly whether there is any accessible
software or telephone application update, and always use
their latest version! Due to constant updates it is possib-
le that some functions of the device and the applications
operate and appear in a way other than described in these
instructions for use.

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Figure 1
3. INFORMATION APPEARING ON THE
DISPLAY OF THE THERMOSTAT

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4. FUNCTIONS ACCESSIBLE IN THE PHONE
APPLICATION
Figure 2

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5. LOCATION OF THE THERMOSTAT
It is expedient to install the thermostat on the wall of a room
used regularly or for a prolonged stay, so that it is located in
the direction of natural air movement in the room, but do not
expose it to draughts of air or extreme heat e󰀨ects (e.g. solar
radiation, refrigerator or chimney). Its optimal position is at a
height of 1.5 m from the oor level.
The product has been designed so that it can be installed most
easily by sinking it in an electric mounting box built in the wall
(Figure7).
IMPORTANTWARNING! If the radiator valves in your at are
equipped with thermostat head then set the thermostat head to
maximum level in the room where you intend to locate the room
thermostat or replace the thermostat head of the radiator valve
with manual regulating knob, otherwise the thermostat head
may disturb the temperature control in the at.
6. CONNECTION AND INSTALLATION OF
THE THERMOSTAT AND PUTTING IT
INTO OPERATION
Attention! Makesurethatthe COMPUTHERM E300thermo-

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stat and the apparatus to be controlled are de-energized
while putting them into operation. The device should be
installed and put into operation by a competent person!
Ifyoudonotpossessthenecessaryskillsandqualica-
tions,pleasegetintouchwithanauthorizedservice.
Caution! The modication of the device poses a risk of
electricshockorbreakdown!
6.1. Connection of the device(s) to be controlled
Forcontrollingaone-zoneheatingsystem
The devices to be controlled should be connected to the ter-
minal block located on rear side of the product. In the thermo-
stat there are two potential free relays whose normally-opened
connection points are at legends COM-NO (3-4) and K2 (8-
9) of the terminal block. When the thermostat gives a switch
signal then it will switch both potential free relays, and closes
the two connections points of COM-NO(3-4)andK2(8-9) sep-
arately. Device(s) to be controlled should be connected here.
For controlling gas boilers the connection points of the boiler
thermostat should be connected to COM-NOor K2 connection
points of COMPUTHERM E300 (Figure3). If the device to be
controlled has no thermostat connection point, the power sup-

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ply cable of the device to be controlled should be cut o󰀨 and
connected to connection points COM-NO(3-4)orK2(8-9) of
the thermostat (Figure4).
Forcontrollingamulti-zoneheatingsystem
Within the loadability limits the two parallel operating relays built
in the thermostat make simultaneous actuation (open/close,
start/stop) of other electrically operable ttings (e.g. zone valve,
pump) possible, in addition to starting up the boiler. Thus, using
Figure 3 Figure 4

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several COMPUTHERM E300 type Wi-Fi thermostats, a heat-
ing system can be easily divided into zones without a separate
zone control system. For example, if you wish to install several
thermostats within a heating network, in addition to controlling
the boiler the zone control (opening/closing various heating
zones) can be en-
sured without a sep-
arate zone control
system, by connect-
ing boiler control
outputs (3-4) in par-
allel and connecting
zone valves to K2
connections points
of the thermostats
(Figure5).
Figure 5

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Forcontrollingacoolingsystem
If you intend to use the product to control a cooling system then
the device to be controlled should be connected to no. 3-5 nor-
mally-closed connection points located on the rear side of the
product. For possible use of the connection points of the rel-
ay marked by K2 take into consideration that they will always
switch oppositely to no. 3-5 connection points. When a cooling
system is being controlled, the cooling system is functioning
when the icon indicating that the heating is on does not appear
on the display of the thermostat and in the phone application.
6.2.Connectingtheoortemperaturesensor
A oor temperature sensor is also included in the packaging
of the COMPUTHERM E300 thermostat. If during operation
you wish to use the oor temperature sensor instead of or in
addition to the temperature sensor built in the thermostat then
connect it to the connection points labelled “Sensing” of the
terminal block located on the rear side of the thermostat.
Using the oor temperature sensor the output(s) can be cont-
rolled on the basis of temperatures measured by this sensor.
On the other hand, with the help of this sensor you can set a
maximum temperature, and the thermostat switches o󰀨 the out-

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puts whenever this temperature is reached. This function may be
especially useful, for safety reasons, for underoor and electrical
heating systems. If you wish to use the sensor to measure oor
temperature, we propose to put the temperature sensor in a short
copper pipe and sink it into the oor so that it can be replaced
easily when a breakdown occurs.
If you connected also a oor temperature sensor to your thermos-
tat and you have chosen the sensor of the thermostat so that the
main sensor is the built-in temperature sensor, and you use the
oor temperature sensor as a safety sensor (2/In-scontrol,Out-s
limit) (see Sub-chapter8.1) then you can check the temperature
measured by the oor temperature sensor in the application at the
place shown in Figure 2. You can view this temperature on the
thermostat by touching and icons at the same time. Now
the Floor Temperature appears instead of the Room Temperature
on the display of the thermostat. The temperature displayed on the
thermostat will return to the Room Temperature approximately 10
seconds after you touched any button of the thermostat.
6.3.Connectiontotheelectricalnetwork
The product should be connected to the 230 V network through
a two core cable. Power supply should be connected to points N

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and Lof the terminal block located on the rear side of the thermos-
tat. You do not have to take care of phase correctness during the
connection process.
6.4.Mountingthethermostat
To install the thermostat you should separate the front plate from
the black plate. To do so, slide the front plate of the thermostat
upwards and slide the rear part of the product downwards at the
same time (Figure 6). Following this, place the rear part of the
product into the electric wall mount box then secure it by screws
(Figure7). Finally, slide back the front plate of the product into the
black plate.
Figure 6 Figure 7

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6.5.Installingtheapplication
The thermostat can be controlled by both a smartphone and a
tablet with the help of free application COMPUTHERM ESeries.
Application COMPUTHERM ESeries can be downloaded to iOS
and Android operating systems. The applications are acces-
sible through the following link or using a QR code:
http://quantrax.hu/computherm-wi--termosztatok/
6.6.ConnectingthethermostattoaWi-Finetwork
• On your phone/tablet switch on Wi-Fi connection.
Join the Wi-Fi network to be used for the thermostat.
• Start the COMPUTHERM ESeries application.
• Turn o󰀨 the device by tapping button on the thermostat.
• Touch and hold button while tapping button for a short
time. Then the thermostat enters the settings menu: in the
left bottom corner “SEN” appears and the set temperature
will be replaced by numbers 00 .
• Then touch button 9 times and abbreviation FAC ap-

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pears in the left bottom corner.
• By tapping button several times alter the number 08
ashing in the middle on the right side to 10 or 32.
• Touch the button again.
• Touch and hold button while tapping button for a
short time. Then the display of the thermostat turns on and
its top line the symbol starts to ash rapidly.
• Now touch the “Congure” icon in the right bottom corner in
the application.
• On the appearing page enter the name and password of the Wi-
Fi network to be used than click on “StartConnection” icon.
• The connection has been established successfully between
the thermostat and the Wi-Fi network when on the display
of the thermostat the symbol starts to illuminate conti-
nuously.
6.7.Connectingthethermostattoauseraccount
• You can search for COMPUTHERM E300 thermostats
connected to the Wi-Fi network concerned by tapping the
“Search” icon in the left bottom corner (i.e. this requires that
the thermostat is connected to the same Wi-Fi network used
for the phone).

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• On the appearing page “SearchList” you can choose the
thermostat you wish to assign to the installed application.
Touching the name of the thermostat concerned, it is assig-
ned to the application and from now on the thermostat can
be controlled from anywhere. Following this, on the start
screen of the application all assigned thermostats appear,
together with currently measured (PV) and set (SV) tempe-
ratures.
6.8.Controllingthethermostatbymultipleusers
When several users wish to control the same thermostat, after
the thermostat has been put into operation the following steps
should be carried out to add further users:
• Connect your smartphone/tablet to the Wi-Fi network to
which the COMPUTHERM E300 thermostat has been con-
nected.
• On the apparatus you want to use for controlling download
then start application COMPUTHERM ESeries.
• Tapping the “Search” icon in the left bottom corner, the pho-
ne/table will search COMPUTHERM E300 thermostats con-
nected to the Wi-Fi network concerned.
• On the appearing page “SearchList” you can choose the