ROOM THERMOSTAT
ROOM THERMOSTAT
with OpenTherm+ communication
• LARGE BACKLIT DISPLAY
with intuitive navigation in English
• 9 WEEKLY PROGRAMS FOR
CENTRAL HEATING (C.H.)
6 temperature changes per day
• 1 WEEKLY PROGRAM FOR
HOT SERVICE WATER (D.H.W.)
3 temperature changes per day
• CONTROL TYPE SELECTION
according to room or equitherm control
• OPERATION OPTIMIZATION
preliminary switch-on function
• UP TO 30 % ENERGY SAVINGS
quick investment return
DESCRIPTION
PT5 is intended for controlling gas and electric boilers which use the OpenTherm Plus (OT+) communication protocol. Its great advantages are the backlit display and navigation in CZ/PL/EN/DE/RU.
Controls
turning
short press
= change of temperature setting
= selection (entry) confirmation
= quick change of required
temperature or program (see page 3);
viewing other information (see page 4)
long press
= step back (only in the CONST mode,
page 8)
press
= opening the main menu or returning
a step back
MENU
Backlit display
After you press any button, the display is backlit automatically for at
least 5 s (activated within 30 min after connecting the OT line).
INSTALLATION AND LOCATION
Install the thermostat at a suitable place where its operation will not be affected by direct flow of hot air
from a heating source, by sunshine or other disturbing effects. Do not install it on an external wall either.
The installation height should be at least 1.5 m above the ground. Locate the thermostat in the so-called
reference room, such as the living room (the heat source will be switched according to the temperature
in this room).
The installation can only be done by a person with adequate qualification! Before
installation, disconnect the power supply!
1)
2)
3)
4)
5)
6)
Remove the control part from the bottom cover of the device (Fig. 1, page 3).
Chip off the plastic piece in the middle of the bottom cover to lead in the conductors.
Run the conductors through the hole and connect them to the terminal board acc. to the diagram.
Fasten the bottom cover to the wiring box by means of screws (Fig. 2, page 3).
Mount the control part onto the bottom cover.
Upon the first start (or reset), the thermostat shows the “SET TIME” message; set the current
time and date acc. to the instructions on page 5.
7) To change the navigation menu language, follow page 8.
8) Ask the boiler manufacturer, whether it communicates by means of the standard OpenTherm Plus
protocol (for the Thermona, Ferolli and Viessmann boilers, change the constant No. 26, see page 13).
Wiring diagram:
* The OpenTherm
BOILER
PT5
OpenTherm communication line,
max. length of 50 m, no polarity
2
*
communication terminals
are marked differently
with every boiler type;
therefore, observe the
electric connection
recommended by the
boiler manufacturer!
Fig.1
8
10
9 11 12 13 14
15
7
6
5
4
3
2
1
16
17
18
19
Fig.2
MENU
1, Current day (in the
Prog mode, selection
of days to be
programmed)
2, Heating on indication
3, Hot service water
indicator
4, Central heating
indicator
5, Current room
temperature
6, Anti-freeze temperature
7, Modes for setting
programs (PROG) and
constants (CONST)
(page 6 and 8)
8, Automatic mode
(page 5)
9, Manual mode (page 5)
10, Holiday mode (page 5)
11, Clock setting mode
12, Permanent shut-off
(page 5)
13, Summer mode
14, Boiler inspection indic.
15, OpenTherm (OT+)
communication indic.
16, Current time
17, Current date/
required temperature/
modulation output in %
(in the CONST mode,
for example, number
of the equitherm curve;
for details, see page 9 )
18, Status line, dynamically
changing according to
the running process
19, Key lock indication
USER TIPS
QUICK CHANGE OF REQUIRED TEMPERATURE / PROGRAM
Press twice the“ “ button; the required temperature starts flashing on the display. Change the required temperature by turning
“ pbutton for further informatithe “ “ button and press the “
on, or “ “ to return to the main menu.
In the AUTO mode, the change will last until the next program
change. In this mode, another program can be selected in the
same way.
In the MANU mode, the change is permanent.
By successively pressing the “ “ button, you can view further information on the: required temperature of hot service water, external temperature, central heating temperature, boiler output, and operating hours of
the central heating and hot service water; for detailed description, see
page 4.
3
TEMP. IN AUTO
TEMP. IN MANU
FURTHER INFORMATION
By successively pressing the “ “ button in the AUTO/MANU modes, you can view further information which
the boiler sends to the thermostat (attention: this information may differ according to the boiler type):
INFORMATION ON EXTERNAL TEMPERATURE
Information on the current external temperature provided
a sensor is connected to the boiler!
INFORMATION ON C.H. TEMP. AND MODULATION OUTPUT
Required C.H. = C.H. temperature calculated according to the equi-
OUTSIdE TEMP
therm curve selected, irrespective of the possible min. and max. temperature of C.H. water; the value in brackets is the required temperature with
respect to the min. and max. C.H. temperature set (see page 7).
Current C.H.
= current central heating water temperature
Modul. power
= modulation power of the boiler in %
C.H. OPERATING HOURS
TEMP ANd POWER
Value of the boiler operating hours for central heating. The LCD value means 906
hours and 43 minutes (the maximum value is 9999 hours and 999 minutes).
Resetting hours:
After displaying the operating hours, turn the “
anti-clockwise.
“ button
OPER HOURS CH
HOT SERVICE WATER OPERATING HOURS
Value of the boiler operating hours for hot service water heating. The LCD value
means 906 hours and 43 minutes (the maximum value is 9999 hours and 999
minutes).
Resetting hours:
After displaying the operating hours, turn the “
anti-clockwise.
“ button
OPER HOURS dHW
Additional information may be displayed: flow of water in liters, and temperature return!
ERROR MESSAGES
If the communication line between the thermostat and boiler is disconnected or interrupted,
the LCD displays the “LINE DISCONNECTED” message (at first connection, the thermostat
must be connected via the OT line to the boiler for about 30 minutes).
This system features a long time of clock operation backup – for more than 7 days!
The thermostat must be connected to the OT line for at least 2 days.
In case of a too long communication line failure, you must set the date and time, but the constants and programs remain saved in the thermostat!
In this case, the “SET TIME” reminder appears on the last line of the display.
The OpenTherm protocol allows sending of error messages of different importance from the
boiler to the thermostat. PT5 shows these messages on the last line of the display:
- E xxx , where the xxx value may be 001 to 255. This type of errors may vary according to the boiler
manufacturer; therefore, you must contact a service technician or the manufacturer. The errors may
include, for example: wrong flue gas exhaust, external temperature sensor error, etc.
- Temp. measurement error = the internal sensor of the thermostat is faulty; contact the manufacturer.
- OPT error - central heating temperature = information on the current central heating temperature not
received from the boiler, contact the boiler service.
4
OPERATING MODES
Pressing any button first, you activate the display backlit. By another short press of the
“ MENU “ button, you open the main menu in which you can choose operating modes.
AUTO
(the Pr3 weekly program set by default, see page 6)
The thermostat works according to the weekly program settings (this
program can be changed; for detailed description, see PROG, page 6).
Press twice the “ MENU “ button, choose the AUTO mode by turning the
“ “ button, and press the “
“ button to confirm.
AUTO MOdE
MANU (default temperature setting of 21°C)
The thermostat works according to the temperature setting until the next
manual change.
Press twice the “ MENU “ button, choose the MANU mode by turning the
“ “ button, and press the “
“ button to confirm.
MANUAL MOdE
(the anti-freeze temperature of 3 °C is kept – cannot be changed)
OFF
The thermostat is switched off until the next manual change of the
mode.
Press twice the “ MENU “ button, choose the OFF mode by turning the
“ “ button, and press the “
“ button to confirm.
HOLIDAY
OFF MOdE
The thermostat maintains the preset temperature until the preset date and
selected time. After expiry of the preset period, it automatically returns to
the AUTO / MANU mode last selected before the holiday.
Press twice the “ MENU “button, choose the
mode by turning the
“ “ button, and press the “
“ button to confirm.
Step by step, set the temperature which the thermostat should keep during the holiday, date and time of your return from the holiday. Change the
values by turning the “
“ button and confirm each change by pressing
the “
“ vbutton. After making the settings, press the “
“ button to
return to the basic screen.
Note: The holiday mode can be cancelled any time by selecting another
AUTO or MANU mode.
HOLIdAY
SET TEMP.
CLOCK SETTING
Setting the correct time and date.
Press twice the “ MENU “ button, choose the CLOCK mode by turning the
“ button to confirm.
“ “ button, and press the “
Change the time by turning the “
“ button and confirm each change
by pressing the “
“ button (the parameter modified is always flashing);
pressing the “
“button, you return to the menu.
5
SET TIME
SET HOUR
PROG
(PROGRAMMING)
You can set up to 9 weekly programs for central heating (6 temperature
changes per day). The Pr1 and Pr2 programs are empty; Pr3 to Pr7
programs are set by default. The PrU and PrL are also set by default,
intended for the EVEN/ODD week (see page 12). Further, you can set
1 weekly program for hot service water (see page 7).
PROGRAMMING
Change in the central heating program settings:
Press twice the “ MENU “ button, choose the PROG mode by turning
the “ “ button, and press the “
“ button to confirm.
The selected program number is blinking on the display. Turning the “ “
button, choose the program which you want to change and press
the “ “ button to confirm. Turning the “ “ button, choose the days
to be programmed (you can program day-by-day or 1-5 = Mon-Fri,
6-7 = Sat-Sun, or 1-7 = Mon-Sun) and press the “
“ button to confirm. The 1st change time starts flashing; set the time by turning the
“ “ button (by minimum steps of 10 min) and press the “ “ button
to confirm. Set the temperature for this time by turning the
“
“ button and press again the “
“ button to confirm. The 2nd
change time appears on the display. Proceed in the same way as
with the first change setting.
In this way, you can set up to 6 temperature changes per day.
To return one step back, shortly press the “ “button; to return to the
main menu, press the “
“ button long.
SELECT PROGRAM
SELECT dAY
TIME CHANGES
After changing the preset program, check whether all the changes
made conform to your requirements!
It is not necessary to apply all six changes to one day!
Tables of temperature programs for central heating:
program No.1
program No.2
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
program No.3
program No.4
program No.5
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Note:
5/21 means
that the required
temperature at 5
o’clock is 21 °C
6
program No.6
program No.7
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
U
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
L
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
All the
indicated
programs
can be
changed!
Change in the hot service water program settings:
In the hot service water program (Prt), you can set 3 time intervals
with different temperatures (the minimum step is 1 hour).
SELECT PROGRAM
Press twice the “ MENU “ button, choose the PROG mode by turning
the “ “ button, and press the “
“ button to confirm.
The selected program number is blinking on the display. Turning the “ “
button, choose the Prt program and press the “
“ button to
confirm. Turning the “ “ button, choose the number of days to be
programmed (you can program day-by-day or 1-5 = Mon-Fri, 6-7 =
Sat-Sun, or 1-7 = Mon-Sun) and press the “
“ button to confirm.
The 1st time from starts flashing; set the switch time by turning the
“ “ button and press the “
“button to confirm. The 1st time to
appears; set the switch-of time by turning the “ “ button and press
the “
“ button to confirm. Set the temperature for this time by turning the “ “ button and again press the “ “ button to confirm. The
2nd time from appears on the display. Proceed in the same way as
with the first change setting.
In this way, you can set up to 3 temperature changes per day.
To return one step back, shortly press the “
“, button; to return to
“ button long.
the main menu, press the “
SELECT dAY
TIME FROM
Table of the hot service water temperature program:
The optional t program - for the TUV reheating
Intervals
FROM
TO
FROM
TO
FROM
TO
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
The program preset for hot
service water:
whole week (1-7)
whole day (0-24)
temperature 50 °C.
This program can be changed
any time!
If you just want to change the hot service water temperature
temporarily, use the possibility of a short-term change of hot service
water temperature:
Press the “
“button four times; the value of the required hot
service water temperature, set in the hot service water temperature program (Prt), appears on the LCD.
Turning the “ “ button, change the required temperature
and press the “ “ button to return to the main menu.
0 = off, range from 10 to 65 °C, by 1°C.
7
REOUIR TEMP dHW
CONST (CONSTANTS)
Setting the control parameters.
Press twice the “ MENU “ button, choose the CONST mode by turning the
“ button to confirm.
“ “ button, and press the “
CONSTANTS
1 CESKY
Language selection (CZ/PL/EN/DE/RU/SK).
Choose the language by turning the “ “ button and press the
“ “ button to confirm.
ENGLISH
2 MINIMUM CONTROL TEMPERATURE (5 °C set by default)
The temperature limit below which the programmed temperature cannot be set.
Choose within the range from 3 °C to 10 °C (by 0.5 °C).
Set the value by turning the“
button to confirm.
“ button and press the “
“
TEMP.
3 MAXIMUM CONTROL TEMPERATURE (39 °C set by default)
The temperature limit above which the programmed temperature cannot be set.
Choose within the range from 15 °C to 39 °C (by 0.5 °C).
Set the value by turning the“
button to confirm.
“ button and press the “
4 MINIMUM CENTRAL HEATING TEMPERATURE
(30 °C set by default)
This defines the lower limit of the required heating water temperature, as calculated by the thermostat, at which the boiler
can start heating. This constant hinders unnecessary ignition
of the boiler. Choose within the range from 5.0 °C to 50.0 °C
(by 1.0 °C).
Set the value by turning the“
button to confirm.
“ button and press the “
5 MAXIMUM CENTRAL HEATING TEMPERATURE
Set the value by turning the“
button to confirm.
MIN TEMP CH
“
(70 °C set by default)
This defines the upper limit of the required heating water temperature, as calculated by the thermostat, which the boiler
must not exceed. The maximum-minimum temperature difference must be higher than 8 °C. Choose within the range from
13.0 °C to 85.0 °C (by 1.0 °C).
8
TEMP.
“
“ button and press the “
“
5 MAX TEMP CH
6 CONTROL TYPE SELECTION
(“ROOM CONTROL” set by default)
ROOM CONTROL = PI control (according to the internal temperature),
The thermostat is heating according to the
reference room temperature. You must set the
PI control parameters – constants No. 7 and 8!!
1 - 60 =
EQUITHERM control, the 1 to 60 number
corresponds to the required heating curve (see
page 10). If choosing the equitherm control, follow
the instructions stated at the heating curve graph.
Select the control type by turning the “
the “ “ button to confirm.
6 ROOM CONTROL
6 HEAT CURVE
“ button and press
PI CONTROL SELECTED, CONSTANT NO. 6 SET “BY ROOM”:
7 CONTROL INTERVAL OF PI CONTROL
(10 minutes set by default)
To be selected according to the object thermal inertia.
The optimum setting is usually 10 to 15 minutes.
Selectable range of 5 to 20 minutes (by 1 min).
The interval length in minutes influences the system oscillation.
The lower the value, the higher the risk of oscillations.
Set the value by turning the “
to confirm.
“ button and press the “
8 CONTROL BAND OF PI CONTROL
7 CONTROL INT
“ button
(2 °C set by default)
Only if PI control is selected (constant 6 = without equitherm)
The so-called “proportional band” specifies the moment at which the
thermostat starts limiting the central heating temperature (when the
PI control starts). Selectable range of 0.5 °C to 3.0 °C (by 0.1 °C).
Set the value by turning the “
to confirm.
“ button and press the “
“ button
Preset temperature
Proportional
band
Heating on at
100 % of the
working cycle
9
of the working
cycle
Informative value – the real one is calculated by the thermostat
8 CONTROL ZONE
EQUITHERM CONTROL SELECTED, CONSTANT NO. 6 SET TO „ 1-60“ :
If this control is selected, the external sensor delivered with the boiler must be installed!
It is suitable to choose the equitherm control for large objects in which no reference room can be specified. The equitherm control principle consists in optimisation of the heating system water temperature
according to the external temperature. This relationship is visualized by the below equitherm curves (for the
required room temperature of 20 °C), according to which the required temperature of the heating system water
is selected. The thermostat calculates the heating water temperature according to the equitherm curve selected,
and then sends it to the boiler. Next, the boiler maintains the water temperature at the required value. To prevent
permanent over- or underheating of the object, you must choose the curve steepness according to the heating
system. Selection of the correct curve for the given system is a long-term task, and the system must be tested
at various external temperatures! It is suitable to adjust the internal temperature in the rooms, for example, by
thermostatic heads control. The heating system water temperature is restricted by the min. and max. limit
set by the constants No. 3 and 4! During this control, the external sensor must always be connected to
the boiler!
required temperature of
heating system [°C]
designation of curves
external sensor
temperature [°C]
If you choose a required room temperature different from 20 °C, the thermostat automatically
calculates a curve shift according to the following formula, where the coefficient is 1:
shift = (required temperature – 20) * coefficient
Note: The curve most frequently used in our conditions is approx. 9-11 for low-temperature systems, and approx. 15-17 for classical heating systems.
9 SHIFT OF THE CURVE (value 5 set by default)
1 - 20 = manual correction by coefficient, can be used if
the temperature is still not according to your requirements (by
0.5).
10
If you choose the manual correction, set the heating curve shift coefficient, at which you will achieve the heating water control according to
the current external temperature (the above formula) at various required temperatures in the reference room.
9 SHIFT OF CURVE
required temperature of
heating system [°C]
The example describes selection of the equitherm
curve No. 13 (pink) and its correction calculated
with the coefficient 2.5 (for required temperatures
in 24 °C and 16 °C room). Thus you can achieve
optimum system settings at which the heating system water temperature is controlled according to
the current external temperature.
external sensor
temperature [°C]
AUTO = automatic correction, according to the internal
temperature measured in the reference room. This
option can only be used after a correct equitherm curve
has been selected!
Select the correction by turning the “ “ button and press the “
button to confirm.
“
9 AUTO SHIFT
During this control, the heating curve is automatically corrected depending on both the external temperature and the
current temperature in the reference room where the thermostat is located. Thus you can achieve a higher temperature
comfort in the heated room, optimum operation of the heating system, and thus also higher savings! For this control, the
external sensor must always be connected to the boiler and constant No. 9 must be set to “AUTO”!
10 BUILDING INSULATION (“middle” set by default)
The speed of temperature change in the room at frequent variations
of external temperature depends on the building structure and insulation.
This constant enables you to take the temperature change speed into
account according to the type of the building heated
10 MId INSULAT
(at equitherm control only).
bad = uninsulated building, quick response to external temperature changes
middle = insulated building, slower response to external temperature changes
good = well insulated building, slowest response to external temperature changes
Set the type by turning the “ “ button and press the “
“ button to confirm.
11 CONTROL INTERVAL OF EQUITHERM CONTROL (10 minutes set by default)
Selected according to thermal inertia of the object. The optimum
setting is usually 10 to 15 minutes.
Selectable range 5 min to 20 min (by 1 min).
The interval length in minutes influences the system oscillation.
The lower the value, the higher the risk of oscillations.
Set the value by turning the “
12 RESPONSE SPEED
“ button and press the “
11 CONTROL INT
“ button.
(value 11 set by default)
It is only active in case of selection of equitherm control with automatic
correction according to external temperature! This determines how
quickly the required temperature is achieved. The selectable range is 1
to 16 (by 1).
If the response speed is 1, the required temperature is achieved slowly, which prevents
a possible overswing, but the required temperature is achieved later.
If the response speed is 16, the heating up to the required temperature in case of its
change is immediate, but overswing occurs.
11
Set the value by turning the “
“ button and press the “
“ button.
12 REACTION RATE
13 PRELIMINARY SWITCH-ON OF HEATING (NO set by default)
This function guarantees you the required temperature at the required
time. You need not consider when to switch the heating on in order to
be warm when getting up in the morning without heating unnecessarily
long in advance. You just need to set the temperature program in the
Prog mode and enable this function. Within two operating days, the
program ascertains the thermal constants of the room and then it switches the heating on in advance sufficiently. The preliminary switch-on
time is limited to 2 hours.
Set YES/NO by turning the “
“ button and press the “
“ button
to confirm.
14 SUMMER MODE
13 PRE- SWITCH M
(NO set by default)
In this mode, you are not allowed to switch the heating on. It can particularly be used in the summer period, when you need not heat. After
you enable this mode, the “
“ symbol appears on the display.
Note: The anti-freeze protection (3 °C) and the hot service water
function are still enabled. In this mode, you cannot change the
temperature or set the holiday mode!
Set YES/NO by turning the “
“ button and press the “
“ button
to confirm.
14 SUMMER MOdE
15 EVEN-ODD WEEK SELECTION (NO set by default)
If you choose “YES”, the programs PrU and PrL will alternate
automatically according to the current week (even/odd).
This setting is suitable, for example, for shift operation (the
requirements on thermal comfort in the object change every week).
Set YES/NO by turning the “
“ button and press the “
“ button
to confirm.
15 Odd-EVEN MOdE
16 TEMPERATURE CORRECTION (0 °C set by default)
This is used for correcting the temperature measured by the
thermostat. The setting can only be done after 12 hours of operation,
when the internal sensor temperature has settled. Measure the
ambient temperature with a thermometer; if it is different from the
temperature on the thermostat, set the correction within the range of
-5 °C do +5 °C.
Set the correction by turning the “
“ button and press the “
“
button to confirm.
16 TEMP CORREC
22 KEY LOCK (NO set by default)
This is used for locking the controls as a protection against
undesirable interference of a foreign person.
Set YES/NO by turning the “
to confirm.
12
“ button and press the “
“ button
22 LOCK
23 KEY CODE
This constant can be set if CONST 22 = YES. It is used for setting the
code by which you will be able to activate the controls.
Set a four-digit combination (range from 0 to 9).
The keys will be locked within 1 minute (after opening the basic
23 KEYCOdE
display). The “
“ symbol appears on the LCD..
“ or “
“ button, the LCD asks you to enter the
If you press the “
key code; after entering the correct code, you are able to make any
changes (the controls are functional again).
Gradually set 4 digits by turning the “ “ button; confirm each setting
YOUR CODE
“ button.
with the “
RECOMMENDATION: - record the key code in the table
- you can cancel the code by setting CONST 22 to NO, or by
restoring the default settings of the thermostat (see CONST 28).
24 BOILER INSPECTION REMINDER (1.1.2030 set by default)
Set the date on which you want to be informed about the necessity of
the prescribed boiler service. At the required time, the “MAINTENANCE NECESSARY” message and the “
“ symbol will appear on the
bottom line of LCD (you can cancel the message by setting a new date
for the next boiler maintenance!).
Gradually set the day, month and year by turning the “
“ button.
confirm each setting with the “
“ button,
26 BOILER TYPE (1 set by default)
Possibility of selecting a boiler which has the OpenTherm
communication adjusted.
1 - universal (suits most boiler types)
2 - Thermona gas boilers
3 - Thermona electric boilers
4 - Ferolli
5 - Viessmann
Choose the boiler type by turning the “
27 PASSWORD
24 SERVICE dAY
“ button and confirm with the “
26 bOILER TYPE
“ button.
(not set by default)
It is used for locking the constants related to the given control settings. Suitable for service technicians. After a numerical code
has been entered, the user cannot change constants No. 6, 7, 8,
9, 10, 11, 12 and 26. When entering the mode CONST and browsing
in the constants you can see symbol key „
„ which appear near
the constants. These constants are blocked and you must to know
password for change the constants!
Turning the “ “ button, gradually enter four digits and confirm each
setting with the “
“ button.
27 PASSWORd
28 VERSION (restoring the default settings)
13
Firmware version, informative parameter only.
“ button long (for about 3 s), the RESET message
If you press the “
appears shortly on the LCD and the thermostat returns to the default
settings!
28 VERSION
ROOM THERMOSTAT
with OpenTherm+ communication
PT5 offers new possibilities of controlling boilers with the OpenTherm Plus
communication. The selected language menu with list of functions facilitates
and quickens work during setting the controller in your system. The OpenTherm
communication enables optimum operation of the boiler and heating system
including hot service water, which results in longer boiler life and higher savings.
Characteristics:
4 9 weekly programs for central heating
4 6 temperature changes per day
4 1 weekly program for hot service water
(3 temperature changes per day)
4 programming by 10 minutes and 0.5 °C
4 possibility of programming day-by-day or
Mon-Fri, Sat-Sun and Mon-Sun
4 large backlit graphic display
4 control type selection (PI control or
equitherm control)
4 preliminary heating switch-on function
4 quick change of the required C.H. temp.
4 quick change of the required D.H.W.temp.
4 manual mode (MANU)
Dimensions:
4
4
4
4
4
4
4
4
4
4
4
4
4
4
permanent shut-off (OFF)
HOLIDAY mode
summer mode
even-odd week selection
current temperature correction
key lock
service password (to lock the control
constants settings)
indication of calculated and current
temperature of central heating
indication of the boiler modulation
output in %
operating hours sum for central heating
and hot service water
boiler maintenance indication
anti-freeze protection (3 °C)
automatic SUMMER / WINTER time
changeover
clock operation backup for about 8 hours
83
Technical parameters
28.5
136.5
CERTIFICATE OF GUARANTEE
(guarantee period for the product amounts to 2 years)
product No.:
date of sale:
Power supply
through the OT+ communication line
from the boiler
Communication line
length
polarity
Communication type
twin-lead
max. 50 m
without polarity
two-way, OpenTherm Plus
Min. program. time of C.H.
10 minutes
Min. program. time of H.W.
1 hour
Adjustable temp. range
3 to 39°C
Adjustable temp. range C.H.
5 to 85°C
Adjustable temp. range D.H.W. 0, 10 to 65°C
stamp of shop:
Measurement accuracy
examined by:
Pb
LEAD FREE
in compliance with RoHS
±0,5°C
Protection class
IP20
Relative humidity
< 85% RH
Working temperature
0°C to +40°C
In case of guarantee
or post-guarantee
service, send the
thermostat to the
manufacturer’s
address.
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