EUROSTER UNI2 User manual

EUROSTER UNI2 – INSTRUCTION MANUAL 1
EUROSTER UNI2
Weather-based heating system c ntr ller
MANUFACTURER: P.H.P.U. AS, Chumiętki 4, 63-840 Kr bia
Please read the instruction manual carefully to fully use the controller potential and to ensure
proper operation of central heating system.
Manual version: 01.08.2016
1. APPLICATION
UN 2 is a universal controller designed for heating systems equipped with:
two central heating circuits with mixing valves (e.g. for heater supply and floor heating)
domestic hot water (DHW) circuit
DHW circulation circuit
1. External temperature sensor
2. Room control unit for circuit 1
3. Temperature sensor for circuit 1
4. Central heating pump for circuit 1.
5. Mixer for circuit 1
6. Supply temperature sensor
7. Room control unit for circuit 2
8. Temperature sensor for circuit 2
9. Central heating pump for circuit 2.
10. Mixer for circuit 2
11. Feed pump for DHW tank
12. Temperature sensor for DHW tank
13. DHW circulation pump
14. Temperature sensor for DHW
circulation

EUROSTER UNI2 – INSTRUCTION MANUAL 2
2. FUNCTIONS
2.1. Central Heating Circuits
independent setting of temperature and weather curve for each circuit
independent control of each circuit with room control unit and weekly schedule
ability to disable circuits,
manual or automatic switching of summer/winter seasons – ability to set the start and
end dates of the heating season
selection of circuit operation: by switching the pump on and off or by lowering the
temperature with a mixer when the pump is continuously switched on
work with floor heating distributor
ability to switch on the anti-frost mode
2.2. DHW Circuit
control of weekly schedule
DHW priority
temporary limitation of DHW priority
disinfection of DHW circuits
2.3. DHW Circulati n Circuit
control of weekly schedule
time or temperature-based control of circulation
2.4. C mmunicati n
possibility to combine several UN 2 and UN 3 controllers
common weather sensor
common supply temperature sensor
common (one) boiler control output
common (one) control output for audible alarm
enabled remote reading of temperatures and status of transmitters (with the use of a
special converter and software)
2.5. Utility Functi ns
control of gas or other heating device using an auxiliary potential-free output (normally
closed relay contact)
alarm output (230V 50Hz output)
event log (the controller records 100 most recent alarms or irregularities)
language support: Polish, English, German and Czech
ability to test each output
overheating protection
work with systems with high supply temperature (up to 120°C) – at customer's request
freeze protection
Anti-Stop algorithm – protection of pumps and valves against wear
3. USER INTERFACE
3.1. Main Screen
The main screen shows the following information:
Circuit temperatures: current and set (e.g. calculated based on the weather algorithm)
devices switched on (pump, mixer, boiler)
controller status (anti-stop, disinfection, heating season: W NTER/SUMMER and others)
time and date
Example of screen with description is shown below.

EUROSTER UNI2 – INSTRUCTION MANUAL 3
The symbols shown in the controller mean the following:
pump operation
mixer operation
heating switched on by room control unit
active Anti-Stop algorithm
error
lack of communication
DHW disinfection
boiler input switched on
DHW priority function switched on
AF – fr st pr tecti n turned n
3.2. Multifuncti n Kn b
The control is operated with a multifunction knob. n addition to a rotary face used to change
the set value, it contains 4 buttons used for navigation (between menu items: up, down, next,
previous) and a confirm button, located in the middle of the knob, which also clears the display
of alarm warnings.
CAUTION! When the setting is changed, the new value is remembered after
c nfirmati n with middle r right butt n.
3.3. Light-emitting Di de
A light-emitting diode is located on the left-hand side of the display. Respective colors mean
the following:
green: Operation without errors
red: Error has occurred
blue: Active Menu
yellow: Output test mode
in case the communication is switched on a diode is flashing when the information are
transmitted between the controllers
3.4. Reset and rest ring fact ry settings
To restart a controller press Reset button, use e.g. a toothpick or a pen. Using reset does not
delete settings.
To restore factory settings, press Reset button and hold it for at least 5 s, until “Restoring
factory settings” is displayed.
After restoring factory settings language selection menu is displayed and operation parameters
of the system circuits must be set up again.
3.5. List screens
The controller settings are arranged hierarchically, based on the circuit -> parameters order.
Only the basic settings are available for the user. Advanced options are included in "Settings"
and are protected with an access code.
3.6. Setting Screens
Selected parameters with commentaries are shown below.

EUROSTER UNI2 – INSTRUCTION MANUAL 4
3.6.1. User settings
CH1 circuit
schedule
t can be used to switch off the circuit for selected time on selected days of the week.
circuit temperature
t is the circuit temperature maintained with the use of the mixer. Three settings: for
-20, 0, +10 for work with the weather compensator. One setting for work without the
weather compensator.
CH2 circuit
parameters identical to the CH1 circuit
DHW circuit
schedule
t can be used to switch off the DHW circuit for selected time on selected days of the
week.
DHW temperature
t is the tank temperature to be maintained by the controller.
thermal cleansing f DHW
The proper cleansing consists in heating the DHW tank to the temperature of 70°C and
flushing the pipes with hot water.
Turning the thermal cleansing on enables heating of the tank to the temperature of
70°C and turning on the flow in the circulation circuit.
CAUTION! F r the pr per thermal cleansing, the minimum alarm temperature
f the DHW sh uld be 80°C.
DHW circulati n circuit
schedule
t can be used to set the time of DHW circulation circuit operation on selected days of
the week.
circulati n temperature
The circulation pump is turned on when the temperature of the circulation sensor drops
below the preset circulation temperature by the hysteresis value.
This option is active only if the temperature-based control of circulation is set.
Heating seas n
Turning the heating season off results in switching off CH circuits. The DHW circuits work
normally.
W NTER sign is displayed to indicate activation of the heating season and SUMMER is
displayed to indicate its deactivation.
Aut
This function enables automatic turning on and off for the heating season according to
the preset start and end dates.
nformation on the date and time is used by a schedule algorithm and events log.
turning n/ ff
This parameter enables to turn the heating season on or off manually.
Date and time
This window enables to enter a current date and time. Please remember that only correct
settings enable a proper operation of the schedules and controlling algorithms as well as
events log.
Settings
Entering advanced settings (installer settings).
3.6.2. Installer settings
The installer settings are available after entering the access code. The default c de is “1, 2,
3”.
CAUTION! It is rec mmended t rest re fact ry settings bef re c nfiguring a new

EUROSTER UNI2 – INSTRUCTION MANUAL 5
c ntr ller.
Settings f r CH1 heating circuit and identical nes f r CH2 circuit
turning the circuit n/ ff
This item enables to turn off the unused circuit.
Mixer
turning the mixer n/ ff
This option enables to turn the mixer control off if it is not used in the CH circuit.
n such case the (current and preset) temperatures are not displayed for the
particular circuit.
When operating with turned off mixer the functions responsible for controlling
the temperature and the continuous operation function are not available. The
circuit overheating protection is unavailable as well.
mixer dynamics
Determines the mixer response time to changes in the circuit temperature. An
excessive value may cause frequent cycling of the mixer, whereas the insufficient
value may cause slowness in achieving the preset temperature.
mixer hysteresis
f the measured temperature of the circuit differs from the preset one by half of the
value of the preset hysteresis, then the mixer position is not corrected.
alarm temperature
CAUTION! Alarm temperatures f r all circuits sh uld be selected carefully.
Inc rrect setting f temperature level may cause impr per perati n r maj r
failure f the system c mp nents.
The alarm temperature should be preset as the maximum safe temperature for a
particular circuit.
r m c ntr l unit
This item enables to turn off the inputs of room control units. n such case heating will
be switched on regardless of control units request.
c ntinu us perati n, reducti n f CH temperature
n certain cases continuous operation of the central heating pump is recommended
regardless of whether the room is fully heated or not. n such case the “continuous
operation” option should be activated. Heating is then switched off by reducing the
temperature of the heating medium with the mixer, without switching the pump off.
The circuit temperature is reduced by the value determined with the “CH temperature
reduction” parameter.
When the “continuous operation” option is turned off, the pump will be turned off once
the mixer is closed (when the room control unit or schedule requests the circulation
turn-off).
The pumps are also switched off when the supply temperature drops below the
shutdown temperature.
weather c ntr l unit
The weather control allows for achieving thermal comfort, regardless of the external
temperature. t is only required to connect an external temperature sensor.
Once the weather control is activated, the central heating circuit temperatures should
be set for three external temperatures. On their basis the controller calculates the
currently required circuit temperatures every 10 minutes.
CAUTION! Temperatures must meet the c nditi n T10ºC ≤ T0ºC ≤ T-20ºC,
therwise the c ntr l will n t w rk pr perly.

EUROSTER UNI2 – INSTRUCTION MANUAL 6
fr st pr tecti n, anti-fr st temperature
The anti-frost algorithm is activated when the temperature of the particular circuit
sensor drops below the preset level. n such case both the boiler and the pump are
activated. The schedule settings do not affect the operation of this protection.
CAUTION! The pr tecti n is disabled by default.
sens r c rrecti n
CH1 or CH2 circuit sensor correction allows to correct temperature reading errors, such
as the ones resulting from improper contact between the sensor and the pipe.
test
The test option allows to switch on the connected devices manually. For safety reasons,
when the selected output is being tested, all other outputs are switched off.
Settings f r DHW circuit
turning the circuit n/ ff
This item enables to switch off the DHW circuit if it is not used.
hysteresis
t is a difference between the temperature at which the tank supplying pump is turned
off and turned on.
excess f DHW
The “excess of DHW” parameter determines the value by which the temperature of the
heat source must exceed the temperature of the tank. Setting a higher temperature
ensures an adequate heating capacity and compensates the heat loss due to the
imperfect insulation of pipes connecting the boiler and the tank.
f the temperature of the heat source is not sufficiently high, then the DHW tank
supplying pump is not switched on.
DHW pri rity
Switching on of the DHW priority means that the controller switches off the CH circuits
for the time of DHW heating in order to achieve the temperature preset for the tank as
fast as possible.
n case of operation with active communication mode, the circuits to perform DHW
priority must be selected in the communication menu.
pri rity perati n time, pri rity break time
Time limit for the DHW priority operation prevents excessive cooling of rooms when the
tank may not be properly heated in a reasonable time.
Non-zero priority break time must be set to use this function.
The DHW tank is heated for the time preset by the “priority operation time” parameter (
symbol active on the display screen), then the DHW priority is switched off for the
“priority break time” ( symbol flashing on the display). Subsequently, the DHW
priority is switched on again.
alarm temperature
f the tank is fed by another, additional heat source and if the tank temperature
exceeds the alarm temperature, then the controller switches on the DHW pump which
cools the tank. The pump is switched on only if the feeding temperature is lower than
the preset alarm temperature of the DHW tank. t is indicated with an error of DHW
overheating.
When using hot water special precautions must be taken in order to avoid burning.
fr st pr tecti n
The anti-frost algorithm is activated when the temperature of the DHW circuit sensor
drops below the preset level. n such case the boiler and the pump are switched on and
“AF” symbol flashes on the display. The schedule settings do not affect the operation of
this protection.
sens r c rrecti n
DHW circuit sensor correction allows to correct temperature reading errors, such as the
ones resulting from improper contact between the sensor and the pipe.
test
The test option allows to switch on the connected devices manually. For safety reasons,
when the selected output is being tested, all other outputs are switched off.

EUROSTER UNI2 – INSTRUCTION MANUAL 7
Settings f r DHW circulati n circuit
turning the circuit n/ ff
This item enables to switch off the circulation circuit if it is not used.
C ntr l
temperature-based c ntr l f circulati n
Circulation may operate according to time or temperature parameters.
n case of temperature-based control, the circulation pump is running until the
temperature of the circulation temperature sensor reaches the preset value.
perati n time, circulati n break time
The parameters used only in the case of temporary control of circulation. The
pump operation and idle times are preset.
fr st pr tecti n
t is activated if the temperature of the circulation sensor drops below the preset level.
n such case the boiler and the circulation pump are switched on and “AF” symbol
flashes at the display.
sens r c rrecti n
Circulation circuit sensor correction allows to correct temperature reading errors, such
as the ones resulting from improper contact between the sensor and the pipe.
test
The test option allows to switch on the connected devices manually. For safety reasons,
when the selected output is being tested, all other outputs are switched off.
Supply
shutd wn temperature
The controller operates only when the supply temperature is higher than the shutdown
temperature. t is aimed at reducing consumption of electricity.
shutd wn hysteresis
t is a parameter which is added to the preset shutdown temperature in order to
determine the temperature on the basis of which the controller switches on the heating
circuits, e.g.
shutdown temperature – 30°C, shutdown hysteresis – 5°C, the controller turns on the
heating circuits when the supply temperature reaches 35°C.
excess f supply
The excess of supply parameter determines by how much the supply temperature
should exceed the temperature calculated by the controller for circuits. t allows the
user to set the proper temperature at the boiler (temperature item required for supply).
supply alarm temperature
f the alarm temperature is exceeded at the supply, the alarm algorithm is activated to
attempt to cool down the boiler.
CAUTION! The alarm alg rithm heats circuits t temperatures appr ximate t
alarm temperatures. It is imp rtant t ensure safe level f alarm temperature
f r each circuit.
Fr st pr tecti n
f the temperature of the supply sensor drops below the preset temperature, the
controller switches on the transmitter, which controls the boiler, and “AF” sign flashes
on the display.
supply sens r c rrecti n
Supply temperature sensor correction allows to correct temperature reading errors,
such as the ones resulting from improper contact between the sensor and the pipe.
C mm n
external sens r c rrecti n
Correction allows to correct temperature reading errors, such as the ones resulting from
improper location of the sensor.
audible alarm
The “audible alarm” all ws t switch ff audible alarms generated by the
c ntr ller. This d es n t affect the perati n f the alarm utput.
C mmunicati n
switching n/ ff

EUROSTER UNI2 – INSTRUCTION MANUAL 8
Enables t switch n c mmunicati n c ntr l. D n t switch n
c mmunicati n when the c ntr llers are n t c nnected int a netw rk.
device addresses
Enables to determine the addresses of the individual inputs and outputs.
Device addresses Descripti n
Pr per Physical address of the particular controller (identifier). Range
from 1 to 247. For the proper functioning each controller in the
network must have a unique address assigned.
Supply sens r dentifies a controller that feeds a supply temperature. t may be
a proper address or an address of another controller.
External sens r dentifies a controller that feeds an external temperature. t may
be a proper address or an address of another controller.
B iler utput dentifies a controller with a boiler output active. t may be a
proper address or an address of another controller.
Alarm utput dentifies a controller with an alarm output active. t may be a
proper address or an address of another controller.
DHW-CH1, CH2 pri rity
n case of connecting UN 2 and UN 3 controllers and using DHW priority
function, it is possible to define, which circuits are to operate the DHW tank
feeding priority. The priority switched on – a particular circuit will be switched off
during feeding of the DHW tank; the priority switched off – a particular circuit
operates according to its settings while feeding DHW tank.
CAUTION! If nly ne UNI c ntr ller is perating in the system, r c nnecti n f
independent supply and external sens rs f r each c ntr ller is n t pr blematic, then
the c mmunicati n sh uld n t be switched n. Installing the c ntr ller functi ns as
parallel t each ther will impr ve reliability f the wh le system.
Each controller in the network must have a unique address – identifier assigned. During the
manufacturing process randomly selected addresses are assigned to each controller, however
each system is different and generally requires assigning its own addresses.
Assigning an address in the field of the chosen temperature sensor indicates which controller
will feed the measured temperature. t may be a proper address or an address of another
controller.
More information is included in “ nstallation” Chapter.
events
The device records hazardous events. The display screen shows the following: Event
number (from the time of installation), date, time, and comment, for example:
30. 19-09 14:16:38 DHW overheat
versi n
You must indicate the software version number when contacting the technical support
center. These are two dates.
A: 23:07 24/4/2014 – display driver program
B: 10:08 10/2/2014 – relay driver program

EUROSTER UNI2 – INSTRUCTION MANUAL 9
4. INSTALLATION
4.1. C nnecti n
GENERAL SAFETY RULES
It is necessary t read this user manual carefully pri r t the c mmencement
f the installati n w rks. Inc rrect installati n and impr per use may lead t a
seri us hazard t a user r ther pers ns and result in material damage! Pri r
t m unting r dismantling and maintenance f the c ntr ller, make sure that
it is de-energized!
Danger us v ltages, hazard us t life, may be present n the c ntr ller and
its cables, theref re nly qualified technicians h lding auth rizati n f r
electrical w rks may be entrusted with the installati n f the c ntr ller!
D n t install the c ntr ller in r ms f increased humidity, substantial
dustiness r with presence f caustic r flammable vap rs, pr tect
it against water and ther liquids!
D n t install any c ntr ller sh wing signs f mechanical damage.
The c ntr ller is n t a safety c mp nent f the heating system in the systems
with a risk f damage.
In the case f failure f c ntr l systems, use additi nal pr tective equipment.
Pay careful attenti n t c rrect c nnecti n f pr tective c nduct rs (PC) when
c nnecting p wer cables!
D n t misuse the c ntr ller!
The device is n t intended f r use by children!
Failure t meet the safety and maintenance rules results in l ss
f warranty!
Temperature sens rs are n t adapted t immersi n in liquids.
The c ntr ller w rks nly with actuat rs equipped with limit switches.
The controller should be installed in a location where the temperature does not
exceed 40°C. All the necessary cables should be brought before mounting. The controller is
designed for mounting on a 35mm D N rail. t is recommended to install the controller in a
protective cabinet.
Electrical conductors must be screwed to cubes in accordance with description and drawing,
with proper labeling of wires. Neutral conductors should be screwed to N terminals, phase
conductors to L terminals, and protective conductors to PE terminals. Conductors with cross-
section of at least 0.75mm² should be used for connection.
The controller is equipped with six temperature sensors. There is no need for connecting the
sensors related to circuits / functions that are switched off.
The sensors can be freely connected to the controller, without the need to maintain cable
polarity. During assembly, the sensors should not be lead in parallel with electric conduits
under voltage. t should also be kept in mind to ensure proper contact with the measured
surfaces.
External temperature sensor should be placed in a shaded area, away from windows and
doors, at a height of approximately 2 m above the ground.
Similarly, the support of room control unit may be activated or deactivated for each heating
circuit. t is allowed to switch off control units with n rmally pen dry c ntact. We
recommend the use of Euroster devices.
N te! Eur ster Uni2 c ntr ller and the heating device c nnected t the "B iler"
utput must be p wered fr m the same p wer system phase.

EUROSTER UNI2 – INSTRUCTION MANUAL 10
The connection diagram is shown below.
4.2.Maintenance
Before each and every heating season, the controller must be cleaned of any dust and dirt, the
cables must be checked for tight fixing. f necessary, wipe it carefully with a soft cloth. Do not
use solvents and aggressive detergents since they may damage the surface of the housing and
the display. Avoid contact with water or other liquids.
4.3. C mmunicati n
4.3.1. RS-485 c nnecti n
UN 2 controller is equipped with a possibility to communicate with use of RS-485 interface. The
connection should be made with use of a shielded twisted pair in bus topology. A, B and GND
terminals of the controller should be connected with A and B cables of the bus and a shield
(figure).
The controllers are equipped with a linear polarization and return loss system. t is sufficiently
effective in case of short connections. With connections of several hundred meters, termination
resistors with resistance of 120 Ω should be placed at both ends.

EUROSTER UNI2 – INSTRUCTION MANUAL 11
4.3.2. Address all cati n
After connecting a twisted pair, activate the communication and select the addresses of
controllers in all connected controllers. Each of the controllers must be provided with a
different address. t is advised to write down the addresses in a visible place in a boiler room,
which will facilitate the configuration process.
4.3.3. B iler c ntr l
The communication feature enables to control the boiler with the use of one controller output.
The boiler will be switched on by any controller in the network.
UN 3 operates additional heat sources. This function is strictly connected with controlling the
main boiler and is not operated by the communication protocol (it does not feature in UN 2).
Therefore, in case of using an additional heat source, the operation of the additional heat
source must also be switched on in the controller that switches on the main boiler. n other
words, the main boiler must be connected to the output of the same controller, to which the
sensor of the additional heat source is connected.
Moreover, in other controllers the parameter of boiler output to the address of the controller
which controls the boiler should be set.
Sample configuration of UN 2 and UN 3 controllers connected to each other:
Address UNI2 UNI3 Descripti n
Pr per 1 2 Unique address of each of the devices.
Supply sens r 1 1 A common supply sensor connected to UN 2
controller is used.
External sens r 2 2 A common supply sensor connected to UN 3
controller is used.
B iler utput 1 1 A common boiler switch-on output in UN 2 controller
is used.
Alarm utput 1 2 Alarm outputs are individual in each controller
separately (assigned proper addresses).
5. CONTROLLER OPERATION
CAUTION! Once the c ntr ller is switched n the Anti-St p alg rithm is activated
(pump and mixer utputs are switched n f r 30 s). The Anti-St p m de is repeated
every tw weeks, regardless f the heating seas n.
5.1. Supply temperature
UNI2 c ntr ller d es n t affect the temperature at the b iler (system supply).
H wever, it calculates it and sh ws it n the display, and the user sh uld ensure that
the supply temperature exceeds the temperature currently required by the c ntr ller

EUROSTER UNI2 – INSTRUCTION MANUAL 12
(alth ugh d es n t exceed the alarm temperature). Otherwise, it is n t p ssible t
maintain pr per temperatures in the system.
5.2. Heating Circuits
Heat in the selected circuit is activated if:
the CH circuit is switched on
the heating season mode is on (W NTER)
the current time is indicated in the schedule of the selected circuit
the room control unit is switched on or work with room control unit is off
the DHW tank is heated or the DHW priority is off
the supply temperature is higher than required
Normally, the circulation pump is switched on when the heating is switched on and the mixer is
not closed. However, if the "continuous operation" is switched on, the pump runs continuously,
while the room temperature is achieved by adjusting the circuit temperature. Details are
described in Section "3.5.3. nstaller Settings".
CAUTION!
The temperature set for the CH circuit is not displayed when:
CH circuit is switched off
the room control unit has reached the set temperature and has switched off the circuit
break in the schedule work of the selected circuit is set
DHW priority function is active
5.3. DHW Circuit
Heating of the DHW tank is on if:
the DHW circuit is switched on
the current time is indicated in the DHW schedule
the tank temperature is too low
the supply temperature is adequate
5.3.1. Disinfecti n f the DHW System
Maintaining low temperature of DHW (approximately 40ºC) may lead to development of
bacterial flora in the system. The following must be done in order to carry out disinfection:
turn on disinfection at the controller
ensure that the supply temperature is not lower than the temperature indicated by the
controller – heating of tank and circulation circuit is initiated
when the tank is properly heated the controller shows the "Disinfection complete"
message
open taps and flush the system with hot water (be careful – possible burn)
5.4. DHW Circulati n
Circulation circuit is active when:
the circulation circuit is switched on
the current time is indicated in the circulation schedule
the supply temperature is adequate
and during disinfection
The circulation pump works in accordance with the set work and break times, or if the
temperature of circulation sensor is too low.
5.5. Alarm Output
The alarm output is used to connect an additional, external alarm signaling device.
Voltage is applied to the alarm output in the case of sensor failure, circuit overheat, or other
errors.
CAUTION! The alarm signaling device must be adjusted t v ltage in 230V netw rk.
At the same, relevant information will appear on the display screen, along with the time of
error.

EUROSTER UNI2 – INSTRUCTION MANUAL 13
5.6. B iler Output
The Boiler output is used to switch on the heat source, for example gas boiler. t is equipped
with 3 contacts, marked NC, NO and COM. They are galvanically isolated from the rest of the
system. They withstand a network voltage of 230V and a load of 4A.
The boiler output is switched on if it is necessary to heat any of the circuits.
CAUTION! The utput status is n t affected by the supply temperature.
5.7. The perati n f the c ntr ller in arrangement with ut supply temperature
sens r
n case if supply temperature sensor is not used, RZ resistors (included in the kit) with 1K5
value should be installed instead.
The temperature at the supply part of the heating system will be approximately 83°C, which
will enable the correct operation of all algorithms.
6. POSSIBLE ERRORS IN THE CONTROLLER OPERATION
6.1. The selected circuit d es n t pr vide heat – cl sed valve r deactivated pump
Check:
whether the heating season mode is activated
whether a correct date (day of the week) and time is set
whether heating is active in the schedule for the current day of the week and time
in a system equipped with a weather sensor – whether indication of external
temperature is correct and whether the temperatures are set correctly
whether DHW with priority is activated
in a system without a room control unit – whether it is deactivated in the controller
in a system with a room control unit – whether it is activated and properly connected to
the controller
whether the mixer is not connected inversely and whether it is not jammed
6.2. The selected circuit is verheating
Check:
whether the valve is not stuck
whether the mixer actuator is running
whether the actuator conduits are connected properly
the mixer dynamics value
6.3. "Aut matic reset" message
dentify the conditions under which the reset takes place. Check the software version. Contact
the technical support centre.
6.4. Lack f c mmunicati n (in case if c mmunicati n is switched n)
Check:
if the communication is switched on
if there is a unique address assigned to each controller
if the entered addresses of the sensors and outputs correspond to the addresses of the
controllers
if the voltages on A and B (RS-485) terminals in all controllers with no twisted par
connected are similar to the voltages of the twisted par

EUROSTER UNI2 – INSTRUCTION MANUAL 14
7. DIMENSIONS
8. TECHNICAL DATA
Power supply: 230 V 50 Hz
Maximum power consumption: 4W
Maximum output load: 100W (each output)
Temperature adjustment range:
CH circuits: 15°C to 90°C
DHW circuit: 40°C to 75°C
DHW circulation circuit: 20°C to 50°C
Temperature measurement range: -30°C to 120°C
Accuracy of temperature control and readings: 1°C
Work temperature range: 0-40°C
Storage temperature range: 0-55°C
Protection rating: P20
Colour: grey, RAL7035
Assembly: on a 35mm D N rail, in protective enclosure
Alarm output: 230 V 50 Hz
Boiler output: potential-free, normally closed, maximum load of 4A 230V 50Hz
Pump supply output: 230 V 50 Hz
Supply outputs for mixer actuators: 230 V 50 Hz
Controller weight: 545g
9. CONTENTS
UN 2 controller
External temperature sensor (5m)
Supply temperature sensor (1.5m)
Tank temperature sensor (2.5m)
Circulation temperature sensor (2.5m)
CH circuit temperature sensor (2 x 1.5m)
Sensor bands (5 pcs)
Dowels for external temperature sensor – 2 pcs
User Manual with warranty card
Power cord (1.5m)
10. SIMPLIFIED DECLARATION OF EU CONFORMITY
P.H.P.U. AS AGN ESZKA SZYMAŃSKA-KACZYŃSKA hereby declares that the type of EUROSTER
UN 2 equipment conforms to the following directives: 2014/35/EU (LVD), 2014/30/EU (EMC),
2011/65/EU (RoHS).
The complete text of the Declaration of EU conformity is available at the following nternet
address: www.euroster.pl

EUROSTER UNI2 – INSTRUCTION MANUAL 15
ELECTRONIC WASTE MANAGEMENT INFORMATION
This product is designed and manufactured of high quality materials and
components suitable for reuse.
The crossed out wheelie bin symbol located at the product means that the product
is subject to selective collection in accordance with the provisions
of the Directive 2012/19/EU of the European Parliament and of the Council.
The product contains an internal battery subject to the selective collection in accordance with
the provisions of the Directive 2006/66/EC of the European Parliament and of the Council.
Such marking informs that the electrical and electronic equipment and batteries may not be
disposed of together with other household waste after their service life. The user
is obliged to take the used devices and batteries to a point of collection of waste electrical and
electronic equipment and batteries. The entities collecting such equipment, including the
collection points, shops, and municipal entities, set up an appropriate system enabling
handover of such equipment and batteries.
The proper disposal of waste equipment and batteries contributes to prevention
of consequences hazardous to the health of persons and nature, resulting from the possible
presence of hazardous components in the equipments and batteries and from inaccurate
storage and processing of such equipment and batteries. The guidelines regarding disposal of
the batteries are included in the user manual.
A household plays an important role in contributing to reuse and recovery including recycling,
of the waste equipment. The attitudes influencing protection of the common good of clean
environment are shaped at this level. Households are also one of the larger users of small
equipment and its rational management at this stage impacts the recovery of recyclables.
naccurate disposal of this product may be penalised in accordance with national legislation.

EUROSTER UNI2 – INSTRUCTION MANUAL 16
WARRANTY CARD
EUROSTER UNI2 C ntr ller
Warranty Terms and Conditions:
1. The warranty is provided for a period of 24 months from the date of sale.
2. A faulty controller with the warranty card should be delivered to the point of sale.
3. Claims under the warranty shall be examined within 14 working days from the date on
which the manufacturer receives the device.
4. Only the manufacturer or other entity, explicitly authorized by the manufacturer, can
make any repairs of the product.
5. The warranty becomes void in the case of mechanical damage, improper use and
repairs by unauthorized persons.
6. The warranty on the consumer product does not exclude, limit or suspend the buyer's
rights resulting from the product non-conformity.
...................................................................................................................................
Date of sale serial number/date of
manufacture
company stamp
and signature
technical support:
tel. [phone]
The warranty is provided by:
P.H.P.U. AS Agnieszka Szymańska-Kaczyńska, Chumiętki 4, 63-840 Krobia