Tech Controllers EU-281 User manual

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EU-281

EU – 281 user’s manual
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Table of contents
I. Safety ............................................................................................................................. 4
II. Device Description ......................................................................................................... 5
III. Installation of the Controller............................................................................................ 6
IV. Operation of the Controller.............................................................................................. 9
IVa) Operating Principle........................................................................................................ 9
IVb) Main Screen Description ................................................................................................ 9
V. Controller Functions – Menu Options ................................................................................. 13
V.a) Time.......................................................................................................................... 15
V.b) Securities................................................................................................................... 16
V.c) Screen ....................................................................................................................... 17
V.d) Weekly Control ........................................................................................................... 18
V.e) Boiler Control ............................................................................................................. 18
V.f) Language Selection ...................................................................................................... 19
V.g) Information about the Operating Program ...................................................................... 19
V.h) Settings ..................................................................................................................... 20
VI. Alarms ....................................................................................................................... 20
Technical specifications....................................................................................................... 21

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I. Safety
Please read the following regulations carefully before using the device. Failure to comply with these
instructions may cause injuries and damage to the device. This instruction booklet should be carefully
stored.
To avoid unnecessary errors and accidents, ensure that all people who use this device become
familiar with its operation and safety functions. Please keep these instructions and make sure that they
accompany the device in the case of its transfer or sale, so that any user during the period of its use
will have the appropriate information and instruction on device operation and safety. For safety of life
and property follow precautions consistent with those listed in the operating manual, as the
manufacturer shall not be held liable for damage caused by negligence.
WARNING
Live electrical device. Before any activities related to power supply (connecting wires, device
installation, etc.) you must ensure that the regulator is not connected to the electrical grid.
Installation should be carried out by a person with the appropriate electrical authorizations.
You must measure the resistance of electrical motors earthing and resistance of electrical wires
insulation before activating the controller.
The regulator is not intended for operation by children.
NOTE
Atmospheric discharges may damage the controller, therefore during storms it is necessary to
disconnect the device from the electrical grid by pulling out the power plug.
The controller must be used in accordance with its intended purpose.
Please check the technical condition of wires before and throughout the heating season. Fas-
tening of the controller should be also checked, and any dust and dirt should be cleaned.
Care for the natural environment is of primary importance for us. We are aware of the fact
that we manufacture electronic devices and it obligates us to dispose used elements and
electronic equipment in a manner which is safe for the nature. As a result, the company
received a registry number assigned by the Chief Inspector of Environmental Protection. The
symbol of a crossed out disposal bin on the product means that the product must not be
thrown out to general waste bins. By segregating waste intended for recycling, we help to
protect the natural environment. It is the user's responsibility to transfer waste equipment to
the selected collection point for the recycling of waste generated from electrical and electronic
equipment.

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II. Device Description
Application of the EU-281 room regulator provides convenient steering and control of room
temperature, boiler, tank and mixing valves directly from home without the need to go down to the
boiler room. The controller is adapted to cooperate with various kinds of main controllers equipped with
RS communication: standard controllers, pellet controllers (equipped with ignition switch) and
installation controllers.
Its large, legible, colourful touch-screen display allows for convenient operation of the regulator
and modulation of its parameters.
The EU-281 room regulator enables:
Control of room temperature
Control of the CH pump temperature
Control of the DHW temperature
Control of the mixing valves temperature (available in cooperation with an additional valve
module)
View of external temperature
Weekly heating program
Alarm clock
Parental lock
Display of current boiler temperature and room temperature
Controller equipment:
Large, legible, colourful, touch-screen display
glass panel
Built-in room sensor
RS communication cable for boiler controller
RS wireless communication module –EU-260 (additional option)

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III. Installation of the Controller
The controller should be installed by a person with the relevant qualifications.
WARNING
There is a danger of fatal electrical shock from touching live connections. You must disconnect the
electrical connection and protect against accidental connection before working with the regulator.
The EU-281 regulator is intended for installation on the wall.

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Scheme of connections – Wire Connection:
The EU-281 room regulator, along with the main controller, should be connected with a four-wired cable
according to the scheme below:
The four-wired cable is connected to the regulator inputs in accordance with colours of wires. The cable
is then connected to RJ12 connector which you should plug into the regulator power supply – the place
of connection is marked on the scheme as point 2 (there is additional description on the power supply).
The regulator power supply should be connected to the controller on the boiler by means of a 4-wired
cable connected on both sides to the RJ12 connector – marked on the connection scheme as point 1.

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Scheme of Connections – Wireless Connection:
Using the EU-260 set you can combine the EU-281 room regulator with
the main controller in a wireless manner.
Connections should be carried out in accordance with the following
scheme:
The four-wired cable is connected to the regulator connector in accordance with colours of wires. This
cable is then connected to the RJ12 connector and should be plugged into the v2 module – the place
of connection is marked on the scheme as point 2 (there is an additional description on the module).
The controller on the boiler should be connected to the v1 module by means of a 4-wired cable, and
connected at the other end to the RJ12 connector - on the connection scheme this is marked as point
1.
* Optionally, a vertical-6-connector may be used instead.
V1 V2
EU-260 set

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IV. Operation of the Controller
IVa) Operating Principle
The room regulator sends a signal on additional heating or underheating to the main controller.
Depending on the specific settings, the signal for additional heating of rooms may e.g.: switch off the
CH pump, reduce the set temperature of the boiler by the set one (settings can be adjusted with the
main controller). The room regulator also enables change of some settings within the main controller
e.g.: ability to change and set the temperature of the boiler, pump operation modes, etc.
IVb) Main Screen Description
The controller is equipped with a large touch-screen display. The main screen displays the current state
of basic parameters for the boiler.
Depending on the user's settings, the screen may display a visible installation screen or the panels
screen. Data which is displayed on the main screen of the room regulator depends on settings of the
main controller and its type.
NOTE
Each change of the set temperatures, time or other settings on the room regulator or boiler controller
introduces a new setting in both devices.
NOTE
Factory settings show the main screen as the installation screen which the user may change on the
panels screen.
Main Screen Description – Installation Screen:
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2
5
4
3
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6
8
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9
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1. Temperature of smoke (visible only when using the smoke sensor on the main controller).
2. Current time and date –clicking the screen in this area will switch you to the Time menu which
enables you to introduce changes to the current time and date.
3. Icon which signals an activated alarm clock.
4. Icon which signals an activated weekly control.
5. Access to the controller menu.
6. Valve 1 temperature: current and set - clicking the screen in this area will switch you to the
menu which enables you to introduce changes to the set temperature of valve 1.
7. Valve 2 temperature: current and set - clicking the screen in this area will switch you to the
menu which enables you to introduce changes to the set temperature of valve 2.
NOTE
Data concerning the valve must be loaded and registered in order to be displayed on the main screen
of the room regulator on the main controller (in the case of external modules of the valve, e.g.: the
EU-431N). In the circumstance of the valve not being installed, the room regulator will display an "!"
icon.
8. Boiler 1 temperature: current and set - clicking the screen in this area will switch you to the
menu which enables you to introduce changes to the set temperature of the boiler.
9. Icon which signals circulation pump –animation which displays current pump operation.
10. Icon which signals HUW pump - animation which displays current pump operation.
11. Icon which signals CH pump - animation which displays current pump operation.
12. Boiler temperature –current and set. If the third temperature value is displayed it means that
weekly control is activated and this value indicates the current adjustment of the set tempera-
ture of the boiler. Clicking the screen in this area will switch you to the menu which enables you
to change the set temperature of the boiler.
13. The current level of fuel in the feeder.
14. External temperature (visible only when using the external sensor in the main controller).
15. Room temperature –current and set. If the third temperature value is displayed it means that
weekly control is activated and this value indicates the current adjustment of the set room
temperature. Clicking the screen in this area will switch you to the menu which enables you to
change the set room temperature.

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Main Screen Description – Panels Screen:
1. Active operation mode of pumps
2. Icon which shows an enabled weekly control option.
3. Icon which shows an activated alarm clock.
4. External temperature (visible only when using the external sensor on the main controller).
5. Current room temperature.
6. Current time and date.
7. Right parameters panel.
8. Buttons allowing change of active view of parameters panel.
9. Access to the controller menu.
10. Left parameters panel.
With the use of buttons allowing change of active view of parameters panels, the user obtains access
to additional information on the installation condition:
•Room temperature panel
View of current temperature and the set temperature inside the room
- after clicking on this panel it is possible to change the set room
temperature:
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Boiler temperature panel
View of current temperature and the set temperature of the boiler -
after clicking on this panel it is possible to change the set temperature
of the boiler.
Boiler temperature panel
View of the current temperature and the set temperature of the boiler
- after clicking on this panel it is possible to change the set
temperature of the boiler.
Valves data panel
View of the current temperature and set temperature of valve 1, 2, 3
or 4 - after clicking on this panel it is possible to change the set
temperature of the selected valve.
Fuel level panel
View of the fuel level in the boiler (this mode is only active when
selected by the user with the boiler controller).
Charts panel
Current temperature chart: boiler, tank or inside the room –
graphically presents temperature changes in time

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Pellet boiler change phase panel
This sub menu allows the user to enable or disable the boiler. This
option is only unavailable during daily boiler operations, which fall
under temporary operation settings.
Pump operation mode-change panel
View of the operation mode – shows the active pumps operation mode
(active view only in the case of the pellet type boiler) – after clicking
on this panel it is possible to change the pumps operation mode. A
selection can be made from among the following modes: Home
heating, Priority, parallel pumps, summer mode with additional
heating and summer mode without additional heating. Detailed
description of pumps operation modes can be found in the operation
manual of the boiler controller.
V. Controller Functions – Menu Options
During normal operation of the regulator, the devices home page is visible on the graphic display.
After clicking on the menu the user is switched to that particular controller function.

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Main Menu
Time
Timer
Day
Alarm Clock
Disabled
Active on Selected Days
At Once
Waking Hour
Day
Securities
Auto-Lock
Activated
Disabled
PIN Code
Screen
Screensaver
Screensaver Selection
Idle Time
Screen View
Panels Screen
Installation Screen
Night from Hour
Day from Hour
Brightness During the Day
Brightness at Night
Weekly control
Activated
Disabled
Settings
Boiler Control Submenu Subject to the Type of the
Main Controller
Language Selection
Information about the
Operating Program
Settings
Temperature Sensor
Hysteresis
Calibration
Main Controller Type
Standard Controller
Pellet Controller
Installation ControllerBuilt-in Timer
Software update

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V.a) Time
After clicking on the Time icon on the main menu
you will see the panel used for changing timer settings,
current date and alarm clock settings.
Timer
This function allows the user to set the current time,
according to which the regulator will then operate.
Date
This function allows the user to set the current date,
according to which the regulator will then operate.
Alarm clock
This function allows the user to set the alarm clock.
There is an option to set the alarm clock so that it will
activate only on selected days (active on selected days) or
whether it will activate once each time.

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- waking hour can be set by means of using the "up" and
"down" arrows.
- when the alarm clock is to be active only on selected
days, the user must select the days on which the alarm
clock is to be activated.
Controller screen view at the time of activation of the
alarm clock.
V.b) Securities
After clicking on the Securities icon on the main
menu you will see the panel used for changing settings of
the parental lock.
Auto-Lock
After clicking on the Auto-lock icon you will see the panel
used for switching the parental lock on or off.

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PIN Code
In order to set the PIN code (necessary for regulator
operation when the lock is active - you must click PIN code
icon
NOTE
The factory set PIN code is "0000".
V.c) Screen
After clicking on the Screen icon on the main menu you will see the panel used for changing the
screen settings.
Screensaver
On the controller, it is possible to set the screensaver which will activate after a fixed idle time. In order
to return to the main screen view it is enough to touch any place on the screen. The user may adjust
the screen view during the screen time-out by setting particular parameters:
Screensaver selection
By clicking selection of the screensaver you switch to the panel which enables you to turn off the
screensaver option (No screensaver), or set the screensaver in the form of:
- Clock –the screen displays the clock.
- Blank –after the pre-defined time of inactivity the screen goes blank.
- Blanked only at night - the screen will go blank at nighttime.
Idle Time
This function enables you to set the time after which the screensaver will activate.
Screen View
After clicking on the screen view icon the user has the
ability to set the appearance of the main screen. By
default it is set to the pre-installed screen, but you can
also set the panel screen.
Night from hour/Day from hour
In further sub-menus of the screen menu you can decide which hours the controller will switch to the
night mode (Night from hour) as well as return to the day mode (Day from hour).
Brightness during the day/brightness at night
After clicking on the icon, the user may set the percentage value of the screen brightness during the
day and at night.

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V.d) Weekly Control
This function allows you to change the set temperature of
the room in a day-night cycle.
You can set each day you can set the device to
change to a specific temperature at any hour on the main
set value in a 24 hour day-night cycle.
First select the day on which time deviations will
be set – for this option click on the Settings icon and then
select the day for which you want to set the temperature.
After selecting the day, you will see the panel for
setting temperature deviations within selected time
intervals.
To facilitate this, you can copy the set deviation for
subsequent hours – just click on the symbol on the
selected value and by means of the arrows copy selected
settings for subsequent hours.
By clicking on the Copy icon you can copy the settings of
any whole day for the subsequent days.
Weekly setting of the set temperatures reduces
heating costs and provides the desired level of thermal
comfort throughout the whole day. The parameter which
determines the correct operation of this function is the
current time and day settings.
V.e) Boiler Control
The parameters of this submenu depend on the main controller type.
Submenu for Standard Controller:
Set temperature
After clicking on this icon you can change the value of set temperature on the boiler (you can do this
by clicking on ‘view of parameters’ from the starting screen).

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Operation modes
After clicking on this icon, you can easily change the pumps operation mode (in the boiler controller)
between: Home heating, Priority, parallel pumps, summer mode, Floor heating. More detailed
descriptions of these operating modes can be found in the operation manual for the boiler controller.
Submenu for the pellet controller:
Set temperature
After clicking on this icon you can change the value of the
set temperature on the boiler (you can do this by clicking
on ‘view of parameters’ from the starting screen).
Lighting
By clicking on this icon you will activate the process of
lightning the boiler.
Extinguishing
By clicking on this icon you will activated the process of extinguishing the boiler.
Operating mode
After clicking on this icon, you can easily change the pumps operation mode (on the boiler controller)
between: Home heating, Priority, parallel pumps, summer mode, Floor heating. More detailed
descriptions of these operating modes can be found in the operation manual for the boiler controller.
Submenu for the Installation Controller:
Operating modes
After clicking on this icon, you can easily change the pumps operation mode (with the boiler controller)
between: Home heating, Priority, parallel pumps, summer mode, Floor heating. A more detailed
description of these operating modes can be found in the operation manual for the boiler controller.
V.f) Language Selection
After clicking on the Language selection icon on the main menu you will see the panel used for changing
the language for the user.
V.g) Information about the Operating Program
By clicking on this icon the display will show the boiler
manufacturer's logo along with the software version.

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V.h) Settings
After clicking on this icon you can change additional parameters.
Temperature Sensor
After clicking on this icon, you can see the panel which
allows the user to change the hysteresis settings and
calibration of the temperature sensor of the room regulator.
Hysteresis
Hysteresis introduces tolerance for the set temperature
preventing unwanted oscillations under minimal
temperature fluctuations (0 ÷ 10⁰C) with accuracy to 0.1°C.
Example: when the set temperature constitutes 23oC and
hysteresis is set to 1⁰C, the room regulator will begin to
indicate under heating in the room after the temperature
falls to 22⁰C
Calibration
Calibration of the device is set during the installation. It can additionally be set after a longer period of
use of the regulator - if the room temperature measured by the internal sensor differs from the current
temperature. The regulation range is as follows: -10 to + 10 ⁰C with accuracy to 0,1⁰C
Main Controller Type
After clicking on this icon, the user selects the main controller type with which room regulator will
cooperate: standard, pellet or installation. After the selection is made, the Boiler control submenu will
be changed.
Software update
Insert the memory stick with the new software version in the USB port and click on the icon. The up-
date will happen automatically.
VI. Alarms
The EU-281 room temperature regulator will signal all
alarms generated by the main controller. When the alarm
activates, the room regulator will send sound signals and
the display will show the same message as the boiler
controller. In the case of internal sensor damage "room
temperature sensor fault" will appear.