Seltron RCD20 User manual

RCD20..
User manual and installation instructions
ENEN

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EN
The Seltron room unit allows you to eciently and economically heat or cool your
rooms. With a simple user interface, you can easily set the temperature you want
or include any of the user functions for a comfortable temperature, saving mode or
holiday mode.
For proper and economical use always set the actual requested temperature. Setting
a higher or lower temperature will not accelerate the heating or cooling of the rooms.
The speed of heating or cooling of rooms depends on the heating system and the
construction of your building.
Seltron smart room units can also be connected to the SeltronHome platform, which
allows you to perform all settings with the Clausius BT mobile app. Learn more about
the function and services of the SeltronHome platform at www.seltron.eu.
Please read these instructions carefully before using the product and store them for
future reference.
The same applies to any modification or tampering with the device.
Do not disassemble the device! The device does not contain any components that
are serviceable by the user. In the event of an error, return the device to the seller or
contact an authorised service centre.
The power supply must be switched o when installing the room unit!
The room unit must be installed by a qualified person!
All safety regulations must be observed during installation!
Charging of the built-in battery is allowed only with standard household chargers. The
use of incompatible chargers can lead to fire and cause burns.
After charging the battery, disconnect the charger. Permanent connection to the
charger is not permitted.
This device is not a toy; do not allow children to play with it Also, do not leave the
packaging accessible to children as it may present a choking hazard.
The device can be used by children of 8 and above under the supervision of their
parents.
This device may only be used indoors and must be protected from moisture, dust, and
from direct sunlight or other heat radiation.
Warnings
Use of this device for any purpose other than that described in these
instructions is not permitted and excludes any liability for damages and
warranty.
INFORMATIONS

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TABLE OF CONTENTS
Overview of room unit................................................................................................................................. 6
Descriptions of symbols.............................................................................................................................. 7
overview of information..............................................................................................................................11
Changing the settings..................................................................................................................................11
Switching on, o and selecting the operating mode.....................................................................12
Setting the temperature ........................................................................................................................... 14
Setting the requested day and night temperature............................................................... 14
Setting the temperature for frost protection...........................................................................15
Using special functions...............................................................................................................................16
Party function .......................................................................................................................................16
ECO function.........................................................................................................................................17
Holiday function...................................................................................................................................18
Fireplace function ...............................................................................................................................19
Domestic hot water function........................................................................................................ 20
Settings menu ................................................................................................................................................21
Additional and service settings..............................................................................................................22
Room unit information...............................................................................................................................23
Settings parameters ...................................................................................................................................25
Operation settings P1 .................................................................................................................................26
Service settings S1........................................................................................................................................31
Reset of room unit.......................................................................................................................................33
Locking buttons ...........................................................................................................................................33
Operating the room unit with a smart device................................................................................. 34
Malfunction.....................................................................................................................................................35
Technical data...............................................................................................................................................37
Disposal of old electrical and electronic equipment .....................................................................38

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LCD display with backlight.
1
Button for On/O.
2
Button for user functions and connecting to smart device.
Button to turn the connection to the controller on or o. 1
USB port, type C, for charging of built-in battery.2
6
7
8
OVERVIEW OF ROOM UNIT
1Only by wireless room units.
2Used only by battery-powered models.
1
2
3
4 8
5
7
6
Button for reducing a setting or moving backwards.
3
Button for reviewing data and entering settings.
4
Button for increasing a setting or moving forwards.
5

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DESCRIPTIONS OF SYMBOLS
Symbols to display condition and status.
1
Display of temperatures and other climate data in the room.
2
Operating mode display.
3
3
2
1

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Controller malfunction.
Locked buttons.
Settings menu.
Wireless connection to the
controller is established.
The signal is excellent.
Wireless connection to the
controller is established. The
signal is good.
Wireless connection to the
controller is established. The
signal is weak.
The wireless connection to the
controller is being established
or has been interrupted.
Bluetooth connection to the
smart device is established.
Bluetooth connection to
the smart device is being
established.
Manual operation of the
controller.
In the settings menu, this
means that the parameter value
is changed.
Battery is charging.
The battery is 100% charged.
The battery is 50% charged.
The battery is 20% charged.
Battery charging is required.
Room unit name
(1-first, 2-second)
Event display symbols
DESCRIPTIONS OF SYMBOLS

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Date when the Holiday
function expires.
Measured temperature of the
auxiliary sensor.
Air quality in the room.
DESCRIPTIONS OF SYMBOLS
Symbols for displaying day of the week and state of time
programmes
Symbols for displaying measured and requested temperature
and other information
Measured outdoor
temperature.
Measured room
temperature.
Requested day temperature.
Requested night temperature.
Requested temperature of
protection against freezing
or overheating.
Measured relative air humidity
in the room.1
Monday,
Tuesday,
Wednesday,
Thursday,
Friday,
Saturday,
Sunday.
Operation according to the
time program - day interval.2
Operation according to the
time program - night interval.2
The time when the Party or
Eco function expires.
1Only available in models where this sensor is built-in.
2 The number next to the symbol indicates whether it is the first or second heating circuit.

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Domestic hot water heating
according to the time
programme.
Domestic hot water
heating – permanent
activation
Function for one-time
domestic hot water heating
is active.
Switched-o room heating or
cooling. Frost or overheating
protection activated.
Eco function is active.
Party function is active.
Holiday function is active.
Fireplace function is active.
Room heating.
Automatic shutdown of
heating - summer operation.
Room cooling.
Symbols for operation mode indication
DESCRIPTIONS OF SYMBOLS

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In addition to room temperature, the room unit measures and displays other
information about its operation.
We can browse data by pressing the button.
What information can be displayed depends on the type of the room unit and
the setting of parameters from P1.10 to P1.17.
With parameter P1.18, we can set that the basic display automatically displays
the requested number of other information that we selected for viewing
information next to the measured room temperature Information is switched
on 3-second intervals.
CHANGING THE SETTINGS
The value of any setting can be changed while it flashes.
The instruction manual shows this with dashes.
The value will begin to flash when pressing the or button
for the first time. In the menu, the value starts flashing when it is
selected with the button.
Each setting is confirmed by pressing the button.
By pressing the button you return to the basic display.
If no button is pressed for 15 seconds, you automatically return to the home
screen.
OVERVIEW OF INFORMATION

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EN SWITCHING ON, OFF AND
SELECTING THE OPERATING MODE
Symbols for operation mode indication.
Switching on heating. Switching on cooling. Switching o.
Switching on domestic water according to the time programme.
Press the button for 1 second to switch between the possible operating modes.
* Domestic hot water heating is not available with all controllers.
Operation mode selection
Switched o. Frost or
overheating protection
remains active.
Heating or cooling is active.
1 sec.
1 sec.
* Domestic hot water
heating according to the
time programme and frost
or overheating protection is
active.
* Heating or cooling of rooms
and heating of domestic hot
water according to the time
programme is active.
1 sec.
1 sec.
1
1

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SWITCHING ON, OFF AND
SELECTING THE OPERATING MODE
Switching between heating and cooling
Switching from heating to cooling.
Switching from cooling to heating.
Hold the button for 10 seconds to switch between heating and cooling mode.
Switching is only possible if the room unit operating mode is switched-o.
Symbols for operation mode indication.
Heating switched on. Cooling switched on.
1
Heating is active.
Cooling is active.
Cooling switched-o.
Heating switched-o.
10 sec.
10 sec.
1
1

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EN SETTING THE TEMPERATURE
1
1
2
2
Setting the requested day and night temperature
By pressing the or button, you activate the requested temperature setting.
The current active temperature (day or night) starts flashing.
With further presses of the or button, you change the value of the requested
temperature.
By pressing the button, you complete the setting.
However, by pressing the button, you move to the setting of the second requested
temperature.
Setting the requested day and night temperature is enabled only when heating
is active and the Party, Eco, or Holiday functions are not active.
The value is flashing. Temperature symbol.
Day temperature.
Night temperature.

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Setting the temperature for frost protection
The temperature for frost protection can be
set when the controller is switched o.
By pressing the and buttons, the
requested room temperature for frost
protection is displayed.
If the button is now pressed and held for
at least 2 seconds, the setting value starts
flashing and can be changed with the and
buttons.
By pressing the or button, you confirm
the setting and return to the basic display.
Even when the controller is switched o , it activates heating and adjusts the
temperature to the value set for frost protection, or activates cooling and maintains
the temperature at 34°C.
SETTING THE TEMPERATURE

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EN USING SPECIAL FUNCTIONS
By pressing the button, you select
the requested function and confirm
it with the button.
By pressing the and buttons, you
can change the requested comfort
temperature.
By pressing the button, you move
to time setting.
Buttons and are used to set the
time when the Party function should
stop. By pressing the button again,
you return to the basic display.
When the Party function is on, we can
check or change settings by pressing
button or .
The Party function can be switched
o before the time has expired by
pressing the button again and
selecting the Party function.
2
3
1
1Party function
is selected. 3Time when Party function expires.
Party function enables to switched on operation according to the requested comfort
temperature at any time.
Party function
2Requested comfort
or Party temperature.

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The Eco function enables you to switch on operations at the requested saving
temperature at any time.
1
2
3
1ECO function
is selected. 3Time when ECO function expires.
By pressing the button, you select
the requested function and confirm
it with the button.
By pressing the and buttons,
you can change the requested saving
temperature.
By pressing the button, you move
to time setting.
Buttons and are used to set the
time when the ECO function should
stop. By pressing the button again,
you return to the basic display.
When Eco function is on, we can
check or change settings by pressing
button or .
ECO function can be switched o
before the time has expired by
pressing the button again and
selecting the Party function.
USING SPECIAL FUNCTIONS
Eco function
Requested saving or
Eco temperature
2

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1
2
3
Requested Holiday
temperature.
21 The Holiday
function is selected. 3Date when Holiday function expires.
By pressing the button, you select
the requested function and confirm
it with the button.
By pressing the and buttons,
you can change the requested saving
temperature.
By pressing the button, you move
to date setting.
Buttons and are used to set the
date when the Holiday function should
stop. By pressing the button again,
you return to the basic display.
When the Holiday function is on,
we can check or change settings by
pressing button or .
The Holiday function can be switched
o before the time has expired by
pressing the button again and
selecting the Holiday function.
USING SPECIAL FUNCTIONS
Vacation function enables activation of heating according to the requested saving
temperature until a specific date at any time.
Holiday function

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The Fireplace function disables the influence of the measured room temperature for a
certain duration.
Fireplace function
1
1The Fireplace function is selected.
By pressing the button, you select
the requested function and confirm
it with the button.
The Fireplace function can be
switched o before the time has
expired by pressing the button
again and selecting the Fireplace
function.
Duration of Fireplace function is set with parameter P2.12.
USING SPECIAL FUNCTIONS

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Domestic hot water function
1
Requested domestic water
temperature.
21 Function of one-time domestic
water heating is selected.
2
By pressing the button, you select
the requested function and confirm
it with the button.
Buttons and are used to
change the setting of the requested
temperature of domestic water. By
pressing the button again, you
return to the basic display.
The function of one-time domestic
water heating can be switched
o before the time has expired by
pressing the button again and
selecting the function.
Function enables to switch on one-time d.h.w. heating to the requested temperature.
The function is automatically switched o when domestic hot water is warm or after
one hour.
USING SPECIAL FUNCTIONS