ELEKTROBOCK BT52 User manual

1
BT52
BT52
WIRELESS ROOM THERMOSTAT
for boilers with OpenTherm communication
The BT52 wireless thermostat is designed to control gas and electric boilers that use the OpenTherm plus (OT +) commu-
nication protocol. It consists of a receiving part (receiver) and a transmitting part (transmitter), which use two-way wireless
communications on the frequency of 433.92 MHz. This wireless variant allows for easy and quick installation, thus eliminating
the laborious and time-consuming installation of the line between the thermostat and the boiler with a passage through the
oor. The receiver is connected to the boiler via the OT communication line. This line transmits data and also powers the rece-
iver. The receiver immediately transmits the data obtained from the boiler to the transmitter, where the data is processed. The
required heating water is calculated and this request is sent back to the boiler.
receiver
transmitter
• Possibility to place a thermostat (transmitter) as needed.
• Predictive system (smart timer) guarantees determined
temperature at the required time. The adaptive controller evaluates
temperature gradient of the room and can determine the necessary
time to reach the required temperature.
• 9 weekly programs (optional) for UT (6 temperature changes
for a day).
• 1 week program (optional) for DHW (3 time periods
with dierent temperatures).
• Choice of regulation type:
equithermal regulation
equithermal control with internal temperature correction
PI regulation
• Display of operating hours information for UT / TUV.
• Display of outdoor temperature information.
• Display of heating water temperature and modulation power in-
formation.
• Display of additional information sent by the boiler to the receiver
(water ow in liters, return temperature, etc. depending on the type
boilers).
• E-EPROM memory retains all settings indenitely
even in the event of a power failure.
• Possibility of control via GSM module GST1 or GST2 (optional).
• Automatic changeover to WINTER or SUMMER time.
• Automatic indication of boiler maintenance.
• Measured temperature -9 ° C to 39 ° C.
• Antifreeze mode.
• Holiday mode and summer mode.
• Power supply 2x1.5 V alk. battery
• Power supply via OT communication
line directly from the boiler (or external
adapter AD05 - not included)
• Receiver with SELF-LEARNING system
CODES and with E-EPROM memory (sto-
re code even in case of power failure).
• Visual inspection of conditions
using colored indicator LEDs.
•The receiver keeps the last settings
and in the event of a wireless failure
signal, ensures the operation of the boiler.
ca 25 m
BOILER
with OpenTherm
communications
over one
oor

2
CONTENT
Description BT52 ............................................................... p.1
Content ............................................................... p.2
Properties BT52 ............................................................... p.3
Function .......................................................... p.3
Commissioning diagram .......................................................... p.3
Receiver BT52 ............................................................... p.4
Assembly .......................................................... p.4
Wireless mode .......................................................... p.5
Receiver coding .......................................................... p.5
Transmitter BT52 ............................................................... p.6
Description of controls .......................................................... p.6
Battery placement .......................................................... p.6
Transmitter disassembly .......................................................... p.6
Display description .......................................................... p.7
Operating modes (AUTO, MANU ..) .......................................................... p.8
Setting of temperature programs for UT and TUV .......................................................... p.9
Table of free and preset programs .......................................................... p.9
Setting constants CONST1 to CONST7 .......................................................... p.10
CONST1 Language selection ..................................................................... p.10
CONST2 Minimum regulated temperature ..................................................................... p.10
CONST3 Maximum regulated temperature ..................................................................... p.10
CONST4 Minimum water temperature in the heating system ..................................................................... p.10
CONST5 Maximum water temperature in the heating system ..................................................................... p.10
CONST6 Choice of regulation type ..................................................................... p.10
CONST7 PI control interval ..................................................................... p.10
Setting the CONST8 constant .......................................................... p.11
CONST8 Proportional band of PI regulation ..................................................................... p.11
Setting constants CONST9 to CONST12 .......................................................... p.12
CONST9 Manual or automatic heating curve correction ..................................................................... p.12
CONST10 Building insulation ...................................................................... p.12
CONST11 Equithermal control interval ...................................................................... p.12
CONST12 Equithermal control reaction rate ...................................................................... p.12
Setting constants CONST13 to CONST20 .......................................................... p.13
CONST13 Premature heating on ...................................................................... p.13
CONST14 Summer mode ...................................................................... p.13
CONST15 Odd - even week choice ...................................................................... p.13
CONST16 Temperature correction ...................................................................... p.13
CONST18 Choice of control via GSM module ...................................................................... p.13
CONST19 Phone number setting ...................................................................... p.13
CONST20 Setting the PIN code of the used SIM card ...................................................................... p.13
Setting constants CONST21 to CONST27 .......................................................... p.14
CONST21 Function test ...................................................................... p.14
CONST22 Key lock ...................................................................... p.14
CONST23 Key code ...................................................................... p.14
CONST24 Boiler maintenance indication ...................................................................... p.14
CONST26 Boiler type selection ...................................................................... p.14
CONST27 Password (against setting change) ...................................................................... p.14
Other displayed information .......................................................... p.15
Error messages .......................................................... p.16
Antifreeze mode .......................................................... p.16
GSM module connection .......................................................... p.16
Control when using the GSM module .................................................................. p.17
Technical parameters ......................................................... p.18
For easier orientation in the manual, each page is marked with the symbol of the part of the thermostat to
which it applies specied settings:
RECEIVER TRANSMITTER

3
BT52 FEATURES
Before using the thermostat, it is necessary to verify which functions from the OpenTherm protocol your
heating device uses (some heating devices do not use all the functions of the OpenTherm protocol)!
OpenTherm Plus / Lite (OT + / OT-) protocol: based on this protocol, two-way communication (OT +) takes place
between the thermostat receiver and the boiler. The thermostat receiver obtains the necessary information (eg
about the outdoor temperature), which it then processes and transmits to the transmitter. From the information
obtained about the outdoor temperature, the room temperature and the set constants, the thermostat recalculates
the desired water temperature of the heating system and passes it back to the boiler. This wireless communication
system enables optimal operation of the boiler and heating system, including DHW, thus achieving longer boiler
life and higher savings.
In order to avoid interference and inuence from other BT52s in the vicinity, each thermostat is protected
by its own unique code, which is stored at the factory! As the whole system works on the two-way radio fre-
quency 433.92 MHz, follow the instructions for mounting and positioning the thermostat according to the
instructions!
!BT52 FUNCTIONS
Equithermal regulation
Equithermal control with manual curve correction
Equithermal control with automatic correction according to the eect of room temperature
Correction of the inuence of building dynamics (for equithermal regulation)
PI control (regardless of outdoor temperature)
Premature heating on (adaptive controller evaluates the room temperature gradient
and can determine the time necessary to reach the desired temperature at a given time)
Setting the minimum and maximum water temperature in the heating system
DHW preparation program (3 time intervals per day)
Holiday mode (constant temperature during the holiday)
Summer mode
COMMISSION SCHEME BT52
STUDY MANUAL
BT52
p.1-18
RECEIVER ASSEMBLY
BT52
p.4
TRANSMITTER
RECOVERY
p.6
BT52 TRANSMITTER FUNCTION
SETTINGS p.7-17
WIRELESS MODE SETTINGS
p.5
TRANSMITTER CONTROL
BT52
p.8-17
SERVICE
TECHNICIAN
USER
Follow the instructions to install the receiver and
connect via the communication line to the boiler
(or connect an external adapter).
Operate the transmitter by removing the pro-
tective paper from the batteries (display is active).
Set the clock, programs (PROG), constants
(CONST) and operating mode (AUTO / MANU).
The receiver is coded at the factory.
When the red Error LED on the receiver ashes ,
perform a TEST on the transmitter (see page 8).
If the wireless mode is not switched on, it is nece-
ssary to perform the coding, see p.5!

4
BT52- RECEIVER
The BT52 receiver is a unit that connects directly to the boiler via the OpenTherm communication line. Its function
is to obtain the necessary information from the boiler and pass it on to the transmitter unit.
Installation and commissioning of the receiver should be performed by a SERVICE TECHNICIAN in accordan-
ce with the procedure described below!
ASSEMBLY BT52- RECEIVER
Install the receiver in a suitable place where its operation will not be aected by interference. Install it as far away as possible from large
metal objects (min. 0.5 m) due to poor signal reception. When installing, make sure that no power lines pass around the receiver.
We recommend that the installation is carried out by a person with the appropriate electrical qualication!
In case of unprofessional intervention and damage, the product loses the warranty!
1. Attach the BT52 receiver to the wall using double-sided adhesive tape.
2. We bring the OT communication double line from the boiler to the terminal block marked LINE OT +. Initialization starts no
LED is blinking on the processor (this may take up to 10 minutes). We recommend using an external source AD05-Jack (not
included), which ensures continuous power supply of the receiver and trouble-free operation.
Wireless mode testing
As soon as the red Error LED starts ashing it is possible, after commissioning of the transmitter, to perform a wireless com-
munication test. On the transmitter, press the button MENU and by turning the button
„ „ select the TEST mode and conrm with . By turning the button „ „ you initiate the test.
Receiver function in case of OT line failure
a) the receiver is powered only via the OT line => If the OT line fails, the receiver will lose power and will not work. A
message appears on the transmitter„TRANSMISSION ERROR“ the symbol appears „ „ and the inscription disappears „ RFM“.
The boiler will work according to its thermostat!
b) receiver powered AD05 => In case of OT line failure the receiver will still be powered, yellow diode LINE OT + stops
ashing and the„OT +“ symbol on the transmitter disappears within 4 minutes!
Receiver function in case of wireless connection to the transmitter
a) receiver has information on the outdoor temperature from boiler => Automatically switches to equithermal
control. If it has not been set, the thermostat will automatically select curve no. 12 with a shift of 2.5!
b) receiver has no outdoor temperature information from the boiler => It automatically switches to non-freezing
mode, where it heats for 30 minutes to the maximum temperature given in CONST 5 and does not heat for 3 hours!
BOILER
with OpenT-
herm
communicati-
ons
OpenTherm communicati-
on line, length max.50 m,
without polarity
*
* Exact electrical connection
see instructions for the boiler
used
„R“ function key
to enter
LEARNING MODE
(see page 5)
possibility to connect external
power supply AD05-Jack (5
V / 2.5 A)
LEDs diod Description of functions
LINE OT+
FLASHING - indicates functional OT commu-
nication, starts ashing when the communi-
cation line is connected OpenTherm and CPU
initialization
FLASHING - indicates boiler heating (UT and
TUV)
Error OT+ FLASHING -
indicates a fault in the boiler (eg
disconnection of an external sensor, etc.)
Error
FLASHING - indicates a wireless error
communication, starts ashing the rst time
the processor is initialized (4 to 10 minutes
depending on power supply)
LITS - indicates ongoing communication
between the receiver and transmitter
PWR LITS - indication of external source connecti-
on power supply AD05 (5 V / 2.5 A)
LEDs diod Special modes
Error FLASHING ALTERNATELY - code learning
mode
Error IT WILL FLASH AT THE SAME TIME
- code learned

5
WIRELESS MODE
THERMOSTAT IS CODED BY MANUFACTURE, IT IS NOT NECESSARY TO SET THE CODE!
After connecting the receiver correctly (see page 4) and commissioning the transmitter, test the wireless connection as
follows:
1, Wait until the receiver‘s processor is initialized and the red Error LED ashes .
2, On the transmitter, press the button MENU and by turning the button „ „ select the TEST mode and conrm with .
By turning the button„ „ you initiate the test.
3, The blue LED on the receiver ashes .
4, When connected correctly, the OT + and RFM symbols for OT wireless communication will appear on the transmitter.
If the above test of the connection between the receiver and the transmitter has not failed (the message TRANSMI-
SSION ERROR and the symbol ) encoding is required.
1, Connect the receiver Immag.1 (see page 4) and commission the transmitter Immag.2 (more on page 6).
2, Wait until the receiver processor is initialized and the red LED starts ashing Error Immag.1.
3, On the receiver, press the button Rat 1s - 4s, Error diodes and
they start ashing alternately - the so-called LEARNING MODE Immag. 3.
4, On the transmitter, press the button MENU and by turning the button „ „ select the TEST mode and conrm
with . By turning the button„ „ you initiate the test (Immag.4).
5, Diods Error and they ash simultaneously on the receiver and thus the code is taught Immag.5.
RECEIVER CODING
connect the OT line from
the boiler
insert the batteries into
the transmitter
press the button R(1s to 4s)
to switch to LEARNING MODE
(LEDs ash alternately)
THE CODE WAS LEARNED
(LEDs ash simultaneously)
select TEST mode on the transmitter
and turning the button„ „ perform the test.
Immag.1 Immag.2 Immag.3
Immag.4 Immag.5
the button
RESET
REZIM TEST
TEST

6
DESCRIPTION BT52- TRANSMITTER
The BT52 transmitter is freely portable and serves to transmit the required temperature to the receiver, which sends
this request to the boiler. The clear display shows all current status, including information sent from the boiler.
The delay between data transmissions is max. 2 min.
Set constants, programs and functions according to the procedure described below!
In wireless mode, the boiler is fully controlled by requests from the transmitter!
BATTERY LOCATION AND REPLACEMENT
- remove the control unit from the bottom cover of the device, see „Disassembly“, remove the protective paper
from the batteries and thus becomes BT52 functional
- when replacing the batteries, pay attention to the correct polarity, which is marked in the battery compartment
- the need to replace the batteries is indicated on the display by the ashing symbol
- always use alkaline batteries 2x1.5V type AA!
Warning: when replacing the batteries, which will be longer than 20 s, it is necessary to reset the clock!
(note: BT52 is equipped with E-EPROM memory, which retains stored data even in the event of a power failure)
Dispose of used batteries in accordance with hazardous waste regulations!
!
connector for
GSM modules GST1 /
GST2 (not included)
space for placing alkaline ba-
tteries (2 x 1.5 V R6 / AA)
Backlit display
after pressing any button, the backlight will turn on au-
tomatically for at least 5 s.
Controls
by turning = change of set value
short press = Selection conrmation (entry)
= rapid change of the required temperature
or program (see page 15),
operating hours display (see page 15)
long press = step back (CONST mode only)
p.10-15)
by pressing = enter the main menu or
take a step back
Removing the bottom cover
from the control part

7
DISPLAY DESCRIPTION BT52- TRANSMITTER
1, Current day (in Prog day selection for
programming)
2, Heating on indication
3, DHW indicator
4, UT indicator
5, Current temperature in the room
6, Antifreeze mode
7, Setting modes programs (PROG)
and constant (CONST) (p. 9 to p. 15)
8, Automatic mode (p.8)
9, Manual mode (p.8)
10, Holiday mode (p.8)
11, Clock setting mode
12, Permanent shutdown (p.8)
13, Summer mode
14, Boiler inspection indication
15, Signal transmission indication
16, Wireless communication error
17, Communication indication
OpenTherm (OT +)
18, Wireless communication symbol
19, Current time
20, Current date /
required temperature/
modulation power in%
(in CONST mode e.g.
equithermal curve number,
see page 10 for more details)
21, Status bar, which
changes dynamically
according to the running process
22, Key lock indication
23, Low battery indication
1
2
3
4
5
6
7
8 9 12
10
11 13 14 15 16 17
18
19
20
21
22
23

REZIM TEST
8
DESCRIPTION OF FUNCTIONS AND THEIR SETTINGS BT52 - TRANSMITTER
Make sure that you have studied properly the introductory part of the manual with a description of the device,
battery storage, button functions and display symbols (LCD)! The next part focuses on explaining the basic modes
and setting important ones parameters for the correct operation of the BT52 transmitter.
The rst press of any button activates the display backlight. Another short press of the button“ MENU “
you enter the main menu, where it is possible to select operating modes.
AUTO
The thermostat works according to the set weekly program (this program is possible
change, detailed description see PROG p.9).
MANU (factory set temperature 21 ° C)
The thermostat works according to the set temperature until the next manual change.
OFF
The thermostat is switched o until the next manual mode change.
HOLIDAY
The thermostat maintains the set temperature until the set date and time.
After the set time has elapsed, it automatically returns to the last selected mode before
the AUTO / MANU holiday.
By turning the button twice“ MENU “, turn the button“ “ select AUTO mode and con-
rm with “ “.
(weekly program Pr3 is set by default from the factory, see p.9)
By turning the button twice “ MENU “, turn the button “ “ select MANU mode and con-
rm with “ “.
(non-freezing temperature of 3 ° C is maintained - cannot be changed)
By turning the button twice “ MENU “, turn the button “ “ select OFF mode and con-
rm with “ “.
By turning the button twice “ MENU “, turn the button “ “ select mode
and conrm the button “ “. Gradually set the temperature that the thermostat should
keep during the holiday, the time and date of the holiday return. By turning the button“ “
change the values and press the button“ “ always conrm. After setting, press the button
“ “ to return to the basic view. Note: the holiday can be canceled at any time by selecting
another AUTO or MANU mode.
CLOCK SETTING
Set the current time and date.
By turning the button twice “ MENU “, turn the button “ “ select the CLOCK mode and
conrm with „ “. By turning the button “ “ change the values and press the button “
“ always conrm (set value always ashes), by the button“ “ you return to the menu.
PROG
It is possible to set 9 weekly programs for UT (6 temperature changes per day). Programs
Pr 1 and Pr 2 are empty, Pr 3 to Pr 7 are preset at the factory. Pr U and Pr L are also
preset at the factory and are designed for the EVEN / ODD week option (more on page
13). It is also possible to set a 1-week DHW program (see page 9).
(programming)
CONST
It is used to set control parameters and other thermostat functions (eg premature hea-
ting on, temperature correction, boiler type selection, summer mode, etc.).
(CONSTANT SETTINGS)
TEST
To test the wireless connection between the transmitter and receiver.
press the button MENU and by turning the button „ „ select the TEST mode and con-
rm with . By turning the button „ „ you initiate the test.
(TESTING THE CONNECTION WITH THE RECEIVER)

POZAdOVANA TUV
9
SETTING TEMPERATURE PROGRAMS BT52
By turning the button twice “MENU “, turn the button “ “ select PROG mode and conrm with “ “.
The number of the selected program ashes on the display. By turning the button“ “ select
the program you want to edit and conrm with“ “. Turning the button “ “ select days for pro-
gramming (it is possible to program day by day or 1-5 = Mon - Fri, 6-7 = Sat - Sun and 1-7 = Mon
- Sun) and conrm with the button “ “. The 1st change time ashes, by turning the button “
“ set the time (min. step is 10 minutes) and conrm with“ “. To set this time, turn the knob “ “
temperature and conrm again with the button “ “. The 2nd change time appears on the LCD.
Follow the same procedure as at the rst setting of changes.
In this way it is possible to set up to 6 temperature changes per day.
To move back one step, briey press the button “ “, to return to the basic view, press the key
“ “ for a long time.
After changing the preset program, check all the set changes meet your requirements!
It is not a condition to use all six changes in one day!
To change the program settings for UT:
In the program for DHW (Pr t) 3 time periods with dierent temperatures can be set (min. step is 1 hour).
By turning the button twice “ MENU “, turn the button “ “ select PROG mode and conrm with
“ “.
The number of the selected program ashes on the display. By turning the button “ “
select the program Pr t and conrm with the button “ “. By turning the button“ “
select the number of days to program (it is possible to program day by day or 1-5 = Mon - Fri,
6-7 = Sat - Sun and 1-7 = Mon - Sun) and conrm the button “ “. The 1st time ashes from
turning the button„ “ set the switching time and conrm the button “ “. The data 1st time to
appears, by turning the button“ “ set the switch-o time and conrm
the button “ “. To set this time, turn the knob “ “
temperature and conrm again with the button “ “. The 2nd time from appears on the LCD.
Follow the same procedure as for the rst change settings. In this way it is possible to set up to 3
temperature changes per day. To move back one step, briey press the button “ “, to return
to the basic view, press the key “ “ for a long time.
Changing the program settings for DHW:
If you only want to change the DHW temperature temporarily, use the short-term
DHW temperature change option:
Press the button 4 times“ “, the LCD shows the required DHW temperature set in the DHW
program (Pr t). By turning the button “ “ change the desired temperature
and press the button “ “ to return to the main menu.
0 = o, range 10 to 65 ° C in increments of 1 ° C.
Table of temperature programs for UT and TUV
Factory preset programs: Pr3 to Pr7 (for UT), Pr U and Pr L (for UT and are intended for the selection EVEN / ODD
week, more on page 13), the last program Prt (for DHW). All programs can be changed as needed.
Preset program for DHW:
all week (1-7) all day (0-24) temperature 50 ° C.
Preset programs for UT (eg: data 5/21 means in 5 hours the required temperature is 21 ° C):
program 1
program 2
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
program 1
program 2
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Intervals
Program t optional - for DHW reheating
from to from to from to
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
For rooms
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
For rooms
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
5
For rooms
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
6
For rooms
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
7
For rooms
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
U
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
L
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

MIN TEPLOTA
5 MAX TEPLOTA
6 dLE MISTNOStI
6 EKVI KRIVKA
7 REG INTERVAL
10
1. CZECH
CONST (CONSTANTS)
Setting of control parameters.
Press twice“ MENU “, by turning the button“ “ select the CONST mode and conrm with
“ “.
Language selection (CZ/PL/EN/DE/RU/SK).
By turning the button “ “ select the language and conrm with “ “.
(factory set to Czech)
2. MINIMUM REGUL. TEMPERATURE
Temperature limit below which the required temperature cannot be set during progra-
mming. We choose in the range from 3 ° C to 10 ° C (after 0.5 ° C).
By turning the button “ “ set the value and conrm with the button“ “.
(factory setting 5 ° C)
Temperature limit above which the required temperature cannot be set during progra-
mming. We choose in the range from 15 ° C to 39 ° C (after 0.5 ° C).
By turning the button “ “ set the value and conrm with the button“ “.
It determines the lower limit of the required heating water temperature, calculated by
the thermostat, when the boiler can start heating. This constant prevents unnecessary
ignition of the boiler. Selectable range 5.0 ° C to 50.0 ° C (1.0 ° C each).
By turning the button “ “ set the value and conrm with the button“ “.
It determines the upper limit of the required heating water temperature, calculated by
the thermostat, which the boiler must not exceed. The dierence between min. and the
maximum temperature must be greater than 8 ° C.
Selectable range 13.0 ° C to 85.0 ° C (1.0 ° C each).
By turning the button “ “ set the value and conrm with the button“ “.
3. MAXIMUM REGUL. TEMPERATURE (factory setting 39 ° C)
4. MINIMUM TEMPERATURE UT (factory setting 30 ° C)
5. MAXIMUM TEMPERATURE UT (factory setting 70 ° C)
ACCORDING TO PI = PI regulation
(according to the internal temperature), the thermostat heats up depending on
temperature in the reference room. It is necessary to set the parameters of PI control
constants no.7 and 8!
1 - 60 = EQUITHERMAL regulation, number 1 to 60 corresponds to the requi-
red heating curve (see page 11). Follow the instructions when selecting equithermal
control listed in the heating curve graph.
By turning the button “ “ select the type of regulation and conrm with the button “ “.
6. CHOICE OF REGULATION TYPE (factory set „ACCORDING TO ROOM“)
7. REGULATORY INTERVAL PI REGULATION
It is selected according to the temperature inertia of the object. The optimal setting is
usually 10 to 15 minutes. Selectable range 5 min to 20 min (1 min each).
The length of the interval in minutes aects the oscillation of the system. The lower
this value, the greater the risk of oscillations.
By turning the button “ “ set the value and conrm with the button“ “.
(factory setting 10 minutes)
REGULATION CHOICE PI REGULATION, CONSTANT No. 6 SET„ACCORDING TO THE ROOM“:

8 REGUL PASMO
Set temperature
heating on for
100% duty cycle
Proportionality
zone
Work cycle
*Guide value - actual is calculated by the thermostat
Outdoor sensor
temperature (°C)
Required heating system
temperature (°C)
11
8. REGULATION ZONE OF REGULATION
Only when PI control is selected (constant 6 = no equitherm). The so-called The„proporti-
onal band“ indicates when the thermostat starts to limit the UT temperature (when the PI
control starts).
Selectable range 0.5 ° C to 3.0 ° C (0.1 ° C each).
By turning the button “ “ set the value and conrm with the button“ “.
(factory setting 2 ° C)
EQUITHERMAL CONTROL SELECTION, CONSTANT NO.6 CURVE„1-60“ SET:
Equithermal control is suitable for large objects where it is not possible to determine the reference room. The principle of
equithermal control is the optimization of the water temperature of the heating system depending on the outdoor temperature.
This dependence is expressed by the stated equithermal curves (for the required room temperature of 20 ° C), according to which we
choose the required water temperature of the heating system. The thermostat calculates the heating water temperature according
to the selected equithermal curve, which it then sends to the boiler. The boiler then regulates the heating water temperature to
the required value. It is necessary to select the steepness of the curve according to the heating system in order to avoid permanent
overheating or underheating of the building. Choosing the right curve for a given system is a long-term matter and it is necessary
to test the system at dierent outdoor temperatures! The internal temperature in the rooms should be adjusted, for example, by
regulation with thermostatic heads. The water temperature of the heating system is limited to min. and max. limits, which are set in
constants No. 4 and 5! An outdoor sensor must always be connected to the boiler during this control!
When selecting this control, an outdoor sensor must be installed, which is part of the boiler!
If you select the desired room temperature other than 20 ° C, the thermostat calculates the automatic curve shift according
to the following equation, where the coecient is 1:
shift = (required temperature - 20) * coecient / 2
... where oset is the oset of the calculated heating system temperature in ° C, the required temperature is the set room
temperature and the coecient is the value set in constant no.9 (p.12)
Note: the most commonly used curve in our conditions is about 9-11 for low temperature systems and about 15-17 for
classic heating systems.
For a clearer selection of equithermal curves and parameters, we
recommend: https://history.elektrobock.cz/Equitherm

9 POSUN KRIVKY
9 AUTO POSUN
10 STREdNI IZOL
11 REG INTERVAL
12 RYCHLOST REA
12
9. SHIFT TO CURVE
1 - 20 = manual correction according to the coecient, we will use it if the
temperature is still not according to your requirements (after 0.5).
When selecting the manual correction, you set the coecient of the heating curve shift, where at dierent. At the required temperatu-
res in the reference room, you can regulate the heating water according to current outdoor temperatures (see page 11 for the formula).
(factory setting 5)
Example describes the choice of equithermal cu-
rve No.13 (pink) and its calculated correction by a
factor of 5 (for the required room temperatures of
24 ° C at 16 ° C). We will achieve optimal settings
system, where the water temperature of the hea-
ting system is regulated according to the current
outdoor temperature.
Displacement calculation according to the formula:
10°C = (24 - 20) * 5/2
-10°C = (16 - 20) * 5/2
Ie. according to the graph, at an outdoor tempera-
ture of -10 ° C the heating water temperature will
be approx. 70 ° C (if required for a room 24 ° C) and
approx. 50 ° C (if required for a room 16 ° C).
During this control, the heating curve is automatically corrected depending on both the outdoor temperature
and the current temperature in the reference room where the thermostat is located. This achieves higher thermal
comfort in the heated space, optimal operation of the heating system and thus higher savings! It must be at the
boiler during this regulation always connected outdoor sensor and constant No.9 must be set to„AUTO“!
AUTO = automatic correction, according to the internal temperature measured
in the reference rooms. We can use this option only after the correctly selected equi-
thermal curve!
By turning the button “ “ select the correction and conrm with “ “.
10. BUILDING INSULATION
The rate of change of the room temperature during frequent outdoor temperature uctuations depends
on construction and insulation of the building. With this constant, the rate of temperature change can be
taken into account according to the type of heated building (only with equithermal control).
wrong = uninsulated building, reacts quickly to changes in outdoor temperature
medium = isolated building, responds more slowly to changes in outdoor temperature
correct = well insulated building, responds most slowly to changes in outdoor temperature
By turning the button “ “ select the correction and conrm with„ “.
(factory set„medium“)
11. REGULATORY INTERVAL EQUITHERMAL REGULATION
It is selected according to the temperature inertia of the object. The optimal setting is usually 10 to 15
minutes.
Selectable range 5 min to 20 min (1 min each).The length of the interval in minutes aects the oscillati-
on of the system. The lower this value, the greater the risk of oscillations.
By turning the button “ “ select the correction and conrm with„ “.
(from production 10 minutes)
12. RESPONSE SPEED
Active only when selecting equithermal control with automatic correction according to the internal
temperature! Determines how fast the desired temperature is reached. Selectable range 1 to 16 (1
each).At reaction rate 1, the desired temperature is reached slowly, which prevents the possibility
of overshoot, but the desired temperature is reached later. At reaction rate 16, when the desired
temperature changes, it immediately heats up to the desired temperature, but an overshoot occurs.
By turning the button “ “ select the correction and conrm with “ “.
(factory setting 11)

16 KOREKCE TEPL
13 PREdC ZAPNUtI
14 LETNI REZIM
15 LICHY-- SUdY
18
19
20
13
13. EARLY SWITCHING ON THE HEATING
It is used to correct the temperature measured by the thermostat. The setting must be made only after 12 hours of
operation, when the temperature of the internal sensor stabilizes. Measure the room temperature with a thermo-
meter, if the temperature diers from the temperature on the thermostat, set the correction between -5 ° C and +
5 ° C.
By turning the button “ “ set YES / NO and conrm withthe button “ “.
This function guarantees you the desired temperature at the desired time. You don‘t have to think about when to
turn on the heating so that it gets warm in the morning when you get up and it doesn‘t heat unnecessarily long in
advance. Just set the temperature program in Prog mode and activate this function. During two days of operation,
the thermostat determines the thermal constants of the room and then switches on the heating well in advance.
The early switch-on time is limited to maximum 2 hours
By turning the button “ “ set YES / NO and conrm with the button “ “.
Heating on is not allowed in this mode. The use is mainly during the summer, when it is not necessary to drown.
After activating this mode, the symbol appears on the display“ “.
Note: frost protection (3 ° C) and DHW functions are still functional. You cannot change the temperature and set the
holiday mode in this mode!
By turning the button “ “ set YES / NO and conrm withthe button “ “.
If„YES“ is selected, the PrU and PrL programs will be switched automatically, depending on the week (even / odd).
This setting is advantageous, for example, during shift operation (every week there are dierent requirements for
thermal comfort in the building).
By turning the button “ “ set YES / NO and conrm withthe button “ “.
(factory setting NO)
14. SUMMER MODE (factory setting NO)
15. EVEN EVEN-ODD WEEK (factory setting NO)
16. TEMPERATURE CORRECTION (factory setting 0 ° C)
18. USE GSM
With this constant we select the possibility of controlling the thermostat via the GSM module.
NO gsm module is not enabled
YES gsm module enabled, it is necessary to set CONST 19, 20!
By turning the button “ “ set YES / NO and conrm with the button “ “.
This constant can be set if CONST18 = YES, thus determining the possibility of connecting a GSM modu-
le for control by a mobile phone.
We‘re setting up a phone number in the international format (420123456789), to which return
SMS messages about the thermostat status are to be sent.
By turning the button “ “ set the phone one by one. number, conrm each setting with the button “ “.
This constant can be set if CONST18 = YES, thus determining the possibility of connecting a GSM mo-
dule for control by a mobile phone. We set the PIN code of the SIM card, which is inserted into the
GST1 or GST2 module.
By turning the button “ “ set 4 numbers one after the other, conrm each setting with the button “ “.
Note: If you select YES and do not connect the module, it will appear on the LCD in the basic display„GSM NOT CONNECTED“ warning. The control of
the GSM module is described in detail in the instructions on GST1/GST2.
(factory setting NO)
19. TELEPHONE NUMBER SETTINGS
20. PIN CODE SETTINGS

22
21
23
YOUR CODE
24
26 TYP KOTLE
27 HESLO
14
It is used to lock the controls. It serves as protection against unwanted manipulation by a third party.
By turning the button„ “ set YES / NO and conrm with the button“ “.
22. KEY LOCK (factory setting NO)
We recommend using the thermostat for wireless authentication the rst time you
use it communication!
Turning the button “ “ the test starts and switches on / o several times
output relay (ON / OFF appears on the LCD). The button“ “ the next constant is displayed, to return to
the main menu press the button“ “.
When the GSM module is connected, it is used to verify the correct PIN code.
21. TEST
After connecting the GSM module according to the procedure on page 16, turn the“ “, the following message appears on the LCD:
In progress
control
connection
module.
Module
is connected
and PIN is
entered correctly.
Wrong PIN en-
tered, reset the
transmitter
and reconnect the
module.
This constant can be set if CONST22 = YES. Used to enter a code that will be able to activate the controls.
We set a combination of 4 numbers (in the range 0 to 9).
The keys will be locked within 1 minute (after entering the basic display)
symbol shown “ “. When you press the button“ “ or “ “ the LCD prompts you to enter the key code,
after entering the correct code it is possible to make any changes (the controls are functional again).
By turning the button “ “ set 4 numbers one after the other, conrm each setting with the button “ “.
RECOMMENDATION: - record the key code in the table
- code cancellation is possible by selecting NO in CONST22 or by specifying
thermostat to factory settings (reset button, located inside the control part + button )
23. KEY CODE
24. BOILER INSPECTION NOTICE
We will set the date when we want to be informed about the need for the prescribed boiler service. At the
required date, the word„NECESSARY MAINTENANCE“ will appear on the bottom line of the LCD a symbol
“ “ (We will cancel the data by entering a new date for the next boiler maintenance!).
By turning the button “ “ set the day, month and year one by one, conrm each
setting with the button “ “.
(factory set 1.1.2049)
26. BOILER TYPE
By turning the button “ “ select the boiler type and conrm with the button“ “.
(factory setting 1)
27. PASSWORD
It is used to block constants related to the setting of the given regulation.
Convenient for service technicians. After entering the numeric code, the user cannot
change constants Nos. 6,7,8,9,10,11,12 and 26.
When entering CONST mode and scrolling through constants,
a key character appears for blocked constants „ „, when turning the button “ “ a password
will be required! If no password is entered, the constants remain locked. For the next attempt
to unlock, it is necessary to leave the CONST mode and scroll through the locked constant
again.
By turning the button “ “ enter four numbers one after the other and conrm each setting with the button“ “.
(not set at the factory)
Possibility to select a boiler that has a modied OT communication.
1 - universal (ts most boiler types) 5 - Viessmann
2 - Thermona gas boilers 6 - Dakon
3 - Thermona electric boilers 7 - De-Dietrich
4 - Ferolli 8 - ACV

28 ZMENA CASU
HOd PROVOZU UT
VENKOVNI TEPLOtA
TEPLOTA A VYKON
POZAdOVANA TUV
HOd PROVOZU TUV
29
29. VERSION (factory reset)
Firmware version, information only.
If you press and hold (approx. 3 s) the button “ “,RESET appears briey on the LCD
and the thermostat returns to the factory settings!
15
28. TIME CHANGE (factory setting YES)
If YES, DST / WINTER time is automatically changed according to the calendar. You don‘t
have to watch when the time changes, the thermostat will take care of the automatic
time setting for the given period.
MORE INFORMATION
By successively pressing the button “ “ in AUTO / MANU modes, additional information can be obtained, which
the boiler transmits to the thermostat (note that this information may be dierent depending on the boiler type):
QUICK CHANGE OF REQUIRED TEMPERATURE / PROGRAM
Press twice “ “, the required temperature ashes on the display. By turning the button“
“ change the desired temperature and press the button “ “ for more information or
“ “ to return to the main menu.
In AUTO mode the change will last until the next change given by the program. In this
mode, you can select another program in the same way.
In MANU mode the change will be permanent.
OUTDOOR TEMPERATURE INFORMATION
Information about the current outdoor temperature. The condition is a connected
sensor at the boiler!
INFO ABOUT UT TEMPERATURE AND MODULATION POWER
Required UT = calculated UT temperature according to the selected equithermal cur-
ve, without regardless of min. and max. possible water temperature UT.
Actual UT = current water temperature UT
Modul performance = boiler modulation output in%
UT AND TUV OPERATING HOURS
Indication of operating hours of the boiler for DHW and DHW heating. The indication on
the LCD means 906 hours 43 minutes (max. 9999 hours 999 minutes).
Clock reset:
After displaying the operating hours, turn the button“ “ to the left (counterclockwise).
Press 4x the button “ “, the LCD shows the required DHW temperature set
in the program for DHW (Pr t). By turning the button “ “ change the desired tempera-
ture and press the button “ “ to return to the main menu.
0 = o, range 10 to 65 ° C up to 1 ° C.
SHORT - TERM CHANGE OF REQUIRED DHW TEMPERATURE

PRUTOK
TEPLOtA ZPATECKY
16
ANTIFREEZE MODE
If the room temperature drops below 3 ° C, the BT52 automatically sends a command to switch on the boiler. As
soon as the temperature rises by 0.5 ° C, it returns to the set mode.
ERROR MESSAGES
If the communication line between the thermostat and the boiler is disconnected or interrupted, is displayed on the LCD “ LINK
DISCONNECTED “ (When connecting for the rst time, the thermostat must be connected to the boiler via the OT line for approx. 30
minutes).
If the batteries in the transmitter are disconnected for more than 20 s, it is necessary to set the date and time, but the constants and
programs remain in the thermostat!
In this case, a warning is displayed on the last line of the display„SET THE CLOCK“
The OpenTherm protocol allows sending error messages from the boiler to the thermostat, which are of various importance. BT52
displays these messages on the last line of the display:
- E xxx , where xxx takes on values 001 up to 255. This type of error may vary depending on the boiler manufacturer, therefore it is
necessary to contact a service technician or manufacturer. These are errors such as: bad draught ue gas, outdoor temperature sensor
error, etc.
- ERROR ACTUAL UT - UT temperature = the boiler did not receive information about the current UT temperature, contact the boiler
service.
- ERROR TRANSMISSION = in case of wireless signal failure between the receiver and the transmitter! Check the function of the rece-
iver and perform a TEST on the transmitter (see page 8)
- wireless communication error between receiver and transmitter. Check the function of the receiver
and perform a TEST on the transmitter (see page 8)
- temperature measurement error = internal thermostat sensor is damaged, contact the manufacturer.
DESCRIPTION OF SETTINGS WHEN USING GSM MODULE
1) Install and adjust the BT52 thermostat according to the instructions.
2) For the CONST18 constant, set the option to YES (use GSM) and then set CONST19 and CONST20 according
to instructions from p.13.
3) Insert the activated SIM card into the GST1 (or GST2) module.
4) Connect the thermostat and the GSM module using a data cable (included in the GST1 or GST2 package)
and connect power supply of GSM module for el. 230 V / 50 Hz (the green LED on the module lights up and the
orange LED ashes).
5) As soon as the orange LED lights up, test the correct connection TEST mode (p.8) - for automatic connection
the connection always takes place within 3 minutes, without using the TEST function.
The system can be extended by a GSM module GST1 or GST2 (not included - must be purchased separately), which will allow remote
control of the thermostat via a mobile phone. We control or obtain heating with simple SMS messages thermostat status information.
The following procedure must be followed for correct commissioning:
FLOW
Display of water ow information in liters per minute (in UT).
REVERSE TEMPERATURE
If the boiler allows it, the return temperature to the boiler is displayed in this position.

17
SHAPE OF SENDING MESSAGES
xx = temperature value in ° C (always a two-digit number, eg 05)
Any type of mobile phone can be used to send and receive feedback !!
If your phone has the option to set the font size (format), always use MEDIUM size (option of three font sizes)
or LARGE size (option of two font sizes) when writing messages.
!
SHAPE OF THERMOSTAT FEEDBACK
xx.x = temperature value in ° C
FEEDBACKS ARE SENT WITHIN 3 MINUTES!
Note: If the min./max. Is exceeded. room temperature (set CONST 2 and 3, see manual BT52 p.10)
a„WARNING“ SMS message in the form of Status is automatically sent.
Info: When using a prepaid card, it is necessary to make a paid call once every 3 months. This call is made automatically (in
80 days from 4 pm to 9 pm) to the telephone number specied in the thermostat (CONST 19) and after 20 seconds the call is
automatically terminated. We can perform this function earlier by SMS„Call“.
Our tip! As a cost-eective solution, we recommend using a at rate oer - eg daughter SIM cards with a favorable tari or
other low taris (you can nd more information with your mobile operator):
Status heating system status information
Auto setting the AUTO mode, the thermostat will work according to the last
set temperature program
Manu setting the MANU mode, the thermostat will keep the last permanent
set temperature
Switch o switching o the heating system, messages can be used to cancel the function
Temperature xx or Auto or Manu
Temperature
xx
change of the required temperature (only whole numbers can be entered and must be
in the range permitted maximum and minimum temperatures)
Call callback
Assigned: xx.x is the required temperature (entered by the user)
Act: xx.x is the current room temperature
Switch ON
Switch OFF
heating system ON
heating system OFF
AUTO
MANU
OFF
the thermostat is in AUTO mode
the thermostat is in manual MANU mode
the thermostat is permanently switched o
Sig: x species the magnitude of the signal at the location of the module, where x are values
in the range 0 to 5:
0..No signal can be determined or detected
1. worst level
5..best signal level
Out: xx.x is the current temperature of the outdoor sensor (if used at the boiler)
E xxx error message, where xxx takes values from 001 to 255 (this type of error may vary depending on
the boiler manufacturer, therefore it is necessary to contact the service technician or the manu-
facturer, these are errors such as: poor ue gas exhaust, outdoor temperature sensor error, etc.)
LINE signals an OT line error
RF Err signals a wireless communication error between the receiver and the transmitter
Not accepted! signals an error (wrong SMS format, etc.)

18
Comments

19
Comments

Pb
LEAD FREE
v souladu s RoHS 20
TECHNICAL PARAMETERS
MADE IN CZECH REPUBLIC
EU DECLARATION OF CONFORMITY
Here is ELEKTROBOCK CZ s.r.o. declares that the BT52 type of radio equipment complies with Directive 2014/53 / EU. The full
text of the EU Declaration of Conformity is available at the following Internet address: www.elbock.cz
ELEKTROBOCK CZ s.r.o.
Blanenská 1763
Kuřim 664 34
Tel./fax: [phone]
Technical support (up to 2 pm)
Mobile: [phone]
[phone]
www.elbock.cz
In case of warranty and post-warranty servi-
ce, send the product to the manufacturer‘s
address.
RECEIVER
Power supply directly from the OpenTherm communication line (it is possible to use an
external source AD05-Jack, not included in the package)
Communication line
polarity
length
double line
without polarity
up to 50 m
Type of communication two-way OpenTherm
Frequency 433,92 MHz
Range 200 m (open area), 25 m (built-up area)
Degree of protection IP20
Operating temperature 0°C up to +40°C
TRANSMITTER
Power supply 2x1.5 V alk. batteries 2x1.5 V
Type of communication bidirectional
Frequency 433,92 MHz
RF power <10 mW
Range 200 m (open area), 25 m (built-up area)
Number of temperature changes for each day 6 temperature changes with dierent temperature
Minimum programming time UT 10 minutes
Minimum DHW programming time 1 hour
Adjustable temperature range 3 up to 39°C
UT adjustable temperature range 5 up to 85°C
Adjustable DHW temperature range 0, 10 up to 65°C
Temperature settings each 0,5°C
Minimum indication jump 0,1°C
Measurement accuracy ±0,5°C
Battery life(time) 1 up to 3 years depending on the type of battery used
Degree of protection IP20
Operating temperature 0°C up to +40°C