DuoFern Room Thermostat 2
EN
Instruction manual for the electrical connection and for commissioning
Item no. 3250 18 72
Type: 9485-1
VBD 653-3-1 (07.20)
Contents
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1. This manual... ......................................................................5
1.1 How to use this manual .....................................................................5
2. Hazard symbols ..................................................................6
2.1 Levels of danger and signal words .................................................6
2.2 Symbols and depictions used ..........................................................7
3. Safety instructions .............................................................8
3.1 Intended use ..........................................................................................9
3.2 Improper use ....................................................................................... 10
3.3 Required expert knowledge of the installer ............................ 10
3.4 Glossary - definition ......................................................................... 11
4. Included in delivery ........................................................ 13
5. General view of the operating unit .............................. 14
5.1 General view of the installation housing .................................. 16
5.2 Electrical connections ...................................................................... 17
5.3 Display and its symbols ................................................................... 18
5.4 Views of the standard display ....................................................... 20
6. Product description ........................................................ 22
6.1 Overview of functions ..................................................................... 25
6.2 Functions and sample applications ............................................ 26
7. Technical specifications ................................................. 34
7.1 Factory settings .................................................................................. 37
7.2 Conduct in the event of a power failure ................................... 38
8. Safety instructions for the electrical connection ...... 39
8.1 Important information prior to the electrical
connection and installation ........................................................... 41
8.2 Electrical connection ........................................................................ 43
8.3 Connection diagram with a 230 V control valve .................... 44
8.4 Connection diagram with a 24 V control valve .......................45
EN
2
Contents
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9. Installation after the electrical connection ................ 46
10. Introduction to opening the menus and
setting the functions ...................................................... 47
11. Initial commissioning with the help of the
installation wizard ........................................................... 49
12. Manually changing the target temperature .............. 53
13. Switching automatic mode on/off directly
on the standard display ................................................. 54
14. Calling up and displaying weather data ..................... 55
15. Menu overview ................................................................ 57
15.1 Menu 1 - Switching automatic mode on/off ........................... 59
15.2 Menu 2 - Setting automatic heating phases ........................... 60
15.3 Menu 3 - Setting target temperatures centrally ..................... 75
16. Menu 9 - System settings ............................................... 77
16.1 Menu 9.1 - Setting the time and date ........................................ 78
16.2 Menu 9.5 - Setting the week programme................................. 79
16.3 Menu 9.7 - Installer settings .......................................................... 81
16.4 Menu 9.7.1 - Setting the heating mode .................................... 82
16.5 Menu 9.7.2 - Setting the sensor offset ....................................... 86
16.6 Menu 9.7.3 - Setting the hysteresis / minimum on-time .... 87
16.7 Menu 9.7.4 - Setting the valve protection ................................ 88
16.8 Menu 9.7.5 - Setting the frost protection ................................. 89
16.9 Menu 9.7.6 - Setting the valve mode ......................................... 90
16.10 Menu 9.7.7 - Performing a sensor test ....................................... 92
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3
Contents
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17. Menu 9.8 - Device settings ............................................ 93
17.1 Menu 9.8.1 - Switching the automatic
summer/ winter time on/off .......................................................... 94
17.2 Menu 9.8.3 - Setting the display lighting .................................. 95
17.3 Menu 9.8.5 - Switching the button lock on/off ....................... 96
17.4 Menu 9.8.6 - Setting the holiday mode incl. the setback
temperature ........................................................................................ 98
17.5 Menu 9.8.7 - Setting the party mode incl. the comfort
temperature ......................................................................................100
17.6 Menu 9.8.0 - Displaying the software version ....................... 102
18. Menu 9.9 - DuoFern settings ....................................... 103
18.1 Menu 9.9.1 - Logging DuoFern devices on/off ..................... 104
18.2 Menu 9.9.2 - Setting the DuoFern mode ................................ 108
18.3 Menu 9.9.3 - Setting the transmission channel .................... 110
18.4 Menu 9.9.4 - Switching the weather data on/off ........................111
18.5 Menu 9.9.5 - Displaying the DuoFern address
(radio code)........................................................................................113
19. Logging on to the HomePilot® ....................................114
20. Deleting all settings, software reset .......................... 115
21. Carrying out a hardware reset .................................... 116
22. Error messages............................................................... 117
23. Dismantling .................................................................... 120
24. Simplified EU Declaration of Conformity ..................121
25. Accessories .....................................................................121
26. Warranty conditions ..................................................... 122
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4
1. This manual...
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...describes how to install, connect and operate the DuoFern
Room Thermostat 2.
1.1 How to use this manual
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◆ Before you begin, please read this manual through completely
and follow all the safety instructions
◆ Please also read the instruction manuals of the accessories
(if available) as well as the instructions of the respective
connected electrical appliance
◆ This manual is part of the product. Please store it in an
easily accessible place
◆ When passing the DuoFern Room Thermostat 2 on to a
third party, this manual must be passed on as well
◆ Damage resulting from non-compliance with these
instructions and safety instructions will void the warranty.
We assume no liability for any consequential damage.
EN
5
2. Hazard symbols
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The following hazard symbols are used in this instruction manual:
Danger of fatal electric shock
Danger area / dangerous situation
2.1 Levels of danger and signal words
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DANGER!
This hazard will lead to serious injury or death if not avoided.
WARNING! WARNING!
This hazard may result in serious injury or death if not avoided.
CAUTION!
This hazard may result in minor or moderate injury if not avoided.
EN
This hazard may lead to property damage.
6
ATTENTION!
2.2 Symbols and depictions used
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Depiction Description
1. Procedures
2.
◆ Itemisation
1) or a) Lists
Further useful
i
information
Please read the respective manual
Flashing menu symbols and setting
parameters have a grey background.
Information about opening the
menus and setting the parameters
can be found on page 47.
EN
7
3. Safety instructions
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The use of defective equipment can lead to personal injury
and damage to property (electric shocks / short circuiting).
◆ Never use defective or damaged equipment.
◆ Check that the DuoFern Room Thermostat 2 is intact.
◆ Consult our customer service department in the event that
you discover damage, see page 124.
Improper use leads to an increased risk of injury.
◆ Train all personnel to use the DuoFern Room Thermostat 2
safely.
◆ Children must not play with the device.
◆ Never remove the operating unit from the installation
housing during operation.
Risk of damage due to the overheating or excessive cooling
of the room or flooring.
The relay output remains unchanged if the operating unit is
pulled out of the installation housing during operation. Control
and limiting functions where appropriate are no longer provided.
◆ Make sure that a relay state that poses no risk is set before
removing the operating unit.
◆ Switch off the central heating or air conditioning
beforehand if necessary.
EN
8
3.1 Intended use
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Use the DuoFern Room Thermostat 2 solely to control radiators /
floor heating or the air conditioning within the permissible load
limits, see page 34, Technical specifications.
The DuoFern Room Thermostat 2 is suitable for switching the
mains voltage and extra-low voltage (ELV) with basic insulation.
Only use original spare parts and accessories from
RADEMACHER
◆ By doing so, you avoid the risk of malfunctions and damage
to the DuoFern Room Thermostat 2
◆ As the manufacturer, we provide no warranty for the use of
third-party components and accept no liability for
consequential damage resulting from such
Operating conditions
◆ Only use the DuoFern Room Thermostat 2 in dry rooms
◆ A 230 V/50 Hz power supply, together with a site-provided
disconnecting device (fuse), must be available at the
installation location
◆ The installation and operation of the radio systems is only
permitted for those systems and devices where a malfunction
in the transmitter or receiver would not cause a danger to
personnel or property or where this risk is already covered
by other safety equipment
EN
Radio systems that transmit on the same frequency
i
can cause interference.
9
3.2 Improper use
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Using the DuoFern Room Thermostat 2 for any other purpose than
previously mentioned is not permissible.
Improper use can lead to serious injuries or property
damage.
◆ Do not use the DuoFern Room Thermostat 2 to
disconnect the connected electrical appliance.
◆ Never use the radio system (e.g. DuoFern radio system) and
its components for the remote control of devices and systems
with increased safety-relevant requirements or where there
is an increased risk of accidents. Such applications require
additional safety equipment. Observe the respective statutory
regulations for the installation of such systems.
There is a risk of fatal injury caused by short circuiting and
electric shocks if the DuoFern Room Thermostat 2 is used
outdoors or in damp rooms.
◆ Do not install and use the DuoFern Room Thermostat 2 out-
doors or in damp rooms.
3.3 Required expert knowledge of the installer
i
EN
The electrical connection, installation and commissioning of the
DuoFern Room Thermostat 2 must be carried out by a qualified
electrician with basic heating control knowledge in accordance
with the instructions in this manual.
10
3.4 Glossary - definition
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UW
◆ UW = ultra-white (device colour)
DIN 49075
◆ German Standard "Cover panels for installation devices for
building into device boxes..."
2014/53/EU
◆ European Radio Equipment Directive
ELV
◆ Extra low voltage
Electrothermal control valves
Electrothermal valves with the switching states "normally closed
(NC) or normally open (NO)" are often used for heating control.
You can set the respective valve mode on the DuoFern Room
Thermostat 2 to adapt to the control valve used in each case.
Valve mode NC (normally closed)
◆ The control valve remains closed in an isolated,
de-energised state
Valve mode NO (normally open)
◆ The control valve remains open in an isolated,
de-energised state
EN
11
3.4 Glossary - definition
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Hysteresis / minimum on-time
◆ This function prevents an unnecessary large number of
switching operations by setting a minimum on-time
◆ This prevents the DuoFern Room Thermostat 2 tripping too
often if the room temperatures fluctuate
Offset (sensor offset)
◆ The temperature measured on site can vary slightly from
the room temperature if the DuoFern Room Thermostat 2 is
installed in a unfavourable position (e.g. behind a curtain or
on a cool exterior wall)
◆ An adjustment of the measurement in the range of - 5.0°C
to + 5.0 °C can be carried out using the sensor offset
EN
12
4. Included in delivery
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EN
b)
a)
Included in delivery
a) 1 x Operating unit (50 x 50 mm)
b) 1 x Frame
c) 1 x Installation housing
d) 1 x Spacer frame, see page 46
e) 1 x Instruction manual (not illustrated)
After unpacking please check and compare...
... the contents of the package with those specified above.
*) Accessories optionally available, see page 121
Remote Sensor 9485-F
c)
d)
*)
13
5. General view of the operating unit
M
i
EN
1)
2)
3)
7)
8)
Pos. Symbol Description
1) Operating unit
2) Display
3)
4) Setting buttons
Menu button
◆ Open the main menu
◆ Back to the previous menu or standard
display
◆ Select a menu in the main menu
◆ Set the parameters (more / less)
● Short press or press and hold =
gradual or quick setting
◆ Switch functions on / off
(On / OFF)
◆ Select the display (target (SOLL) /
actual (IST) temperature / time)
9)
4)
5)
6)
14
OK
+
-
5. General view of the operating unit
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Pos. Symbol Description
5)
OK button
◆ Open the selected menu
◆ Confirm and save settings
◆ Continue to the next setting
EN
6)
7)
8) SET button
9) Bridging contact for a hardware reset
Plus button - HOTTER
◆ Gradually increase the target
temperature by 0.5 °C
Minus button - COLDER
◆ Gradually reduce the target temperature
by 0.5 °C
◆ Switch the button lock on/off
(only when the button lock function is
activated)
◆ Display weather information
◆ See page 116
15
5.1 General view of the installation housing
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EN
10)
11)
Pos. Symbol Description
10) Installation housing
11) Claw fasteners and screws
12) Connecting terminals
13) Type plate
13)
12)
16
5.2 Electrical connections
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EN
14)
15)
Pos. Symbol Description
14)
15) Supply voltage [ N / L ] - 230 V / 50 Hz
16) Relay output - potential-free
Remote Sensor 9485-F [ S / N ] - optional
Connect the external Remote Sensor 9485-F
to measure the room temperature.
Connect the supply voltage.
Connect an electrothermal control valve
(also with extra-low voltage) / electric heater
or the air conditioning.
16)
17
5.3 Display and its symbols
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Pos. Symbol Description
17) MO... SO Weekdays (Monday...Sunday)
18) Time / setting parameters
19) DuoFern status
20) Weather information
21) Week programme
22) Rain display
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18
23) OFFSET Sensor offset
24) AUTO Automatic mode
25)
26) Heating
Automatic mode off or
manually changed target temperature
5.3 Display and its symbols
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Pos. Symbol Description
27) Cooling
28) Switching times for the heating phases
29) Brightness display
30) Dusk display
31) Wind display
32) System settings
33) SOLL Target temperature
34) SENSOR Sensor test
35) klx / lx Light intensity (klx = Kilolux / lx = Lux)
36) ° C Temperature unit in degrees Celsius
37) m / s Wind velocity (meters per second)
38) Automatic button lock
EN
The DuoFern Room Thermostat 2 has adjustable LCD
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backlighting, see page 95, menu 9.8.3.
19
5.4 Views of the standard display
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/ You can select the desired view
of the standard display using the
set buttons.
Target temperature
Symbols Description
21.5 °C
SOLL
Actual temperature
Symbols Description
19.8 °C
Time
Symbols Description
FR
EN
The set target
temperature
The current room
temperature
The current
weekday
20
16:30 The current time
5.4 Views of the standard display
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Other symbols can be displayed depending on the
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setting of the DuoFern Room Thermostat 2.
Examples:
Symbols Description
Automatic mode is active.
Heating or cooling is provided at the set
switching times until the room temperature
reaches the target value.
The target temperature has been manually
changed.
Heating is provided as the current room temperature is lower than the target temperature.
Cooling is provided as the current room temperature is higher than the target temperature.
The current weather information from a
DuoFern Environmental Sensor is available.
EN
/
/
Wind or rain display
Brightness or dusk display
21
6. Product description
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The DuoFern Room Thermostat 2 automatically measures and
controls the room temperature in individual rooms, e.g. by
controlling a radiator, the floor heating or air conditioning.
The temperature is either measured by the built-in sensor or by
the optional external Remote Sensor 9485-F. The room thermostat
has a potential-free relay output.
Support for three heating modes
The DuoFern Room Thermostat 2 can be used and
configured in three different heating modes, see page 82:
◆ Room temperature controller
◆ Room temperature controller with limiter function
◆ Cooling function
Furthermore, the DuoFern Room Thermostat 2 can be combined
with the DuoFern Radiator Actuator 2 (item no. 3500 30 74, type:
9433-1) to control it.
Setting multiple heating phases
Up to six heating or cooling phases (incl. four target temperatures)
can be set for each day.
Setting heating phases centrally in the HomePilot® or
locally in the DuoFern Room Thermostat 2
The desired use is carried out by selecting the corresponding
DuoFern mode in menu 9.9.2, see page 108.
EN
22
6. Product description
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Potential-free relay output
The following electrical appliances, for example, can be
connected to the potential-free relay output:
◆ Control valves (also extra-low voltage valves)
◆ Heaters (also electrical heaters up to max. 2300 W)
◆ Air conditioning
Connecting an external temperature sensor (optional)
The Remote Sensor 9485-F is optionally available as an external
temperature sensor if the internal sensor cannot reliably record
the room temperature. This may be useful if:
◆ The DuoFern Room Thermostat 2 is installed in a
thermally unfavourable position
(e.g. on a cool exterior wall)
◆ Heavy loads (e.g. an electric heater) are switched on that
significantly heat up the DuoFern Room Thermostat 2
(self-heating)
When is it absolutely essential to use the external
Remote Sensor 9485-F?
◆ If you are using the DuoFern Room Thermostat 2 as a
temperature limiter (e.g. for floor heating with special floor
coverings).
EN
23
6. Product description
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Two valve modes (NC/NO) to adapt to the control valve used
Electrothermal valves with the switching states "normally closed
(NC)" or "normally open (NO)" are often used for heating control.
You can set the respective valve mode in menu 9.7.6 to adapt to
the control valve used in each case, see page 90.
Manual mode
The device is manually operated with the plus and minus
button.
These buttons can be used to gradually increase or decrease
the target temperature by 0.5 °C, see page 53.
Installation and electrical connection
The DuoFern Room Thermostat 2 is designed as a flush-mounted
device for indoor rooms. The electrical connection is carried out
by means of the connecting terminals on the reverse side of the
installation housing.
Compatible switch ranges
The DuoFern Room Thermostat 2 can be integrated into standard
switch range (50 x 50 mm).
It may be necessary to use an intermediate frame *
50 x 50 (according to DIN 49075) depending on the
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switch range used.
* Not included
EN
24
6.1 Overview of functions
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◆ For use as a local control on site or as a system solution
(HomePilot® / DuoFern radio system)
◆ Manual operation on site with the plus and minus buttons
◆ AUTO / MANUAL switchover
◆ Easy set-up thanks to the installation wizard
◆ Heating and cooling function depending on the connected
device
◆ Configurable for up to 6 switching times per day and any 4
target temperatures
◆ Optional external temperature sensor (Remote Sensor 9485-F)
can be used for external temperature measurement or as a
temperature limiter
◆ Control of the valve / radiator or air conditioning in com-
bination with a DuoFern actuator also by radio (ideal for
retrofitting)
◆ Combination with DuoFern Radiator Actuators 2 (item no.
3500 30 74, type: 9433-1) possible.
◆ Two-step control (on/off) with configurable hysteresis and
adjustable minimum switching time
◆ Target temperature can also be manually changed by the
manual transmitter
◆ Receipt and display of weather data (temperature, bright-
ness, wind velocity and rain) in combination with a DuoFern
Environmental Sensor
◆ Three different week programmes
◆ Automatic button lock
◆ Dimming of the LCD backlighting
◆ Sensor test
◆ Delete or reset all data
EN
25
6.2 Functions and sample applications
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Sample application 1
DuoFern Room Thermostat 2 for individual room
regulation of radiators, floor heating or the air conditioning.
EN
26
Home
office
Living
room
STATUS
RADEMACHER
DuoFern 1-Kanal Aktor
9470-1
Made in Germany
N N
E
L
K
L
Bath
room
Radiator with
electric control valve
Air conditioning
Electric floor heating
6.2 Functions and sample applications
i
Home office
Control the air conditioning by radio using a DuoFern Universal
actuator (e.g. for retrofitting without cabling between the
DuoFern Room Thermostat 2 and the air conditioning).
Bathroom
Directly connect and control electric floor heating.
Living room
Directly connect an electrothermal control valve to control a
radiator.
EN
27
6.2 Functions and sample applications
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Sample application 2
Several DuoFern Room Thermostats 9485 for individual
room regulation of floor heating using DuoFern actuators.
Bath
room
Home
office
EN
28
Living
room
Kitchen
An individual DuoFern Universal actuator for each
room in the cellar, which regulates the control valves.
STATUS
RADEMACHER
DuoFern 1-Kanal Aktor
9470-1
N N
E
L
K
L
Made in Germany
STATUS
RADEMACHER
DuoFern 1-Kanal Aktor
9470-1
N N
E
L
K
L
Made in Germany
STATUS
RADEMACHER
DuoFern 1-Kanal Aktor
9470-1
N N
E
L
K
L
Made in Germany
STATUS
RADEMACHER
DuoFern 1-Kanal Aktor
9470-1
N N
E
L
K
L
Made in Germany
6.2 Functions and sample applications
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A DuoFern Universal actuator (1-channel) per room in the cellar:
◆ This receives the switching commands directly from the
respective DuoFern Room Thermostat 2, thus
regulating the control valves (e.g. for retrofitting if no leads
to the heating manifold are present.)
◆ The parallel connection of several control valves from one
room to one 1-channel Universal actuator each is possible
There is a risk of an unintentional or erroneous influence
through automated scenes or manual operation.
◆ A DuoFern actuator logged on to the DuoFern Room
Thermostat 2 must not be logged on to the HomePilot®
or to other DuoFern controllers (e.g. DuoFern manual
transmitters).
EN
29
6.2 Functions and sample applications
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Sample application 3
Central control through the HomePilot®
Home
office
Bath
room
EN
30
HomePilot®
Living
room
Kitchen
6.2 Functions and sample applications
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The DuoFern Room Thermostat 2 can be connected to the
HomePilot®. This means that the following functions can be used:
◆ The target temperature and display of the current state
(actual temperature, target temperature etc.) can be
changed manually with smartphone apps
◆ The four saved target temperatures can be changed at any
time via the HomePilot® web interface
◆ Scenes can be triggered in the HomePilot® if the
temperature drops below or exceeds the four saved target
temperature values
◆ The DuoFern Room Thermostat 2 must be operated in
mode 1 (DuoFern receiver) to control the heating phases
through scenes in the HomePilot®
Direct access from the HomePilot® to the relay
i
switching state is not possible.
◆ The switching of the relay is always dependent
on the target and actual temperature.
EN
31
6.2 Functions and sample applications
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Sample application 4
DuoFern Room Thermostat 2 for group control of DuoFern
Radiator Actuators 2
Living room
HomePilot®
(optional)
EN
32
6.2 Functions and sample applications
i
elf-sufficient system
S
◆ Control of up to 20 DuoFern Radiator Actuators
◆ Central control: the target temperature is sent from
the DuoFern Room Thermostat 2 to all DuoFern
Radiator Actuators 2
Control via HomePilot®
◆ Only the DuoFern Room Thermostat 2 is registered on
HomePilot®.
◆ Commands are transmitted centrally from the DuoFern
Room Thermostat 2 to the DuoFern Radiator Actuators 2
Optionally, the measured actual temperature of
i
the DuoFern Room Thermostat 2 can be used as
the controlled variable for the DuoFern Radiator
Actuators 2.
Use therefore the menu item “SEn” of the DuoFern
Radiator Actuator 2.
EN
33
7. Technical specifications
i
Mains supply [ L / N ]
Mains supply
voltage:
Consumption: Standby: < 0.4 W
Sensor input [ S / N ] -
e.g. to connect the Remote Sensor 9485-F
Requirement: double insulated
R25: 10 kΩ
B: 3977
Relay output - load contact for 230 V [ ]
Switching voltage: 230 V / 50 Hz
Maximum switching
capacity:
230 V / 50 Hz
ohmic load
inductive loads:
EN
10 A µ / 2300 W
34
M
5 A µ / 1115 VA
7. Technical specifications
i
Relay output - load contact for 230 V [ ]
EN
Maximum switching
capacity:
Improper use can lead to serious injuries or property
damage.
◆ Due to the small contact distance (µ), not suitable for
disconnecting.
◆ Do not use the DuoFern Room Thermostat 2 to disconnect
the connected electrical appliance.
DuoFern radio technology
Transmission frequency: 434.5 MHz
Transmission power: max. 10 mW
Range:
Max. number of DuoFern
devices:
capacitive loads
5 A µ / 1115 VA
in buildings: approx. 30 m *
outdoors: approx. 100 m
* depending on the building
structure
20
35
7. Technical specifications
i
General information
EN
External dimensions
(W x H x D)
Operating unit [ 1 ]:
Available colours: ultra-white (UW), glossy
Installation depth:
Permissible ambient
temperature range:
Protection class: II
Protection type: IP 30 (only for use in dry rooms)
Connecting terminals:
Power reserve for clock in
the event of a power failure
50 x 50 x 12 mm
according to DIN 49075
32 mm
0 °C to + 40 °C
Screw terminals for max.
2
1.5 mm
approx. 8 hours
cable cross-section
36
7.1 Factory settings
i
Factory settings
Automatic mode: off
Automatic time: off
Hot (21.5 °C) from: 06:00
Cold (17.0 °C) from: 23:00
Target temp. 1 and 3: 21.5 °C
Target temp. 2 and 4: 17.0 °C
Weekly programme: off
Automatic summer/winter
changeover:
Standard display: target temperature
Heating mode: 1 (room temperature controller)
Hysteresis: 0.2 °C
Min. on-time / off-time: 2 minutes
Valve protection: off
Frost protection: on; 4.0°C
Valve mode: NC (energised heating)
Quick changeover to
temperature value:
- with + (hot):
- with - (cold):
DuoFern transmission
channel:
on
off
off
channel 1
EN
37
7.2 Conduct in the event of a power failure
i
Power reserve (approx. 8 hours)
The current time flashes for approx. 5 minutes in the event of
a power failure and the DuoFern room thermostat changes to
power reserve.
Time and date after a power failure
The power reserve is approx. 8 hours. If this time is exceeded,
the time and date are lost and need to be reset, see page 78.
The internal timer works with tolerances in power
i
reserve mode. It may therefore be necessary to adjust
the time after a longer power failure.
Data retention following a power failure
All settings remain permanently saved. Data is not lost even
after a longer power failure.
EN
38
8. Safety instructions for the electrical connection
i
Prior to the electrical connection, check that the voltage / frequency on the type plate corresponds to that of the local mains supply.
Read the specifications relating to the electrical
connection detailed in the instruction manual of the
electrical appliance used.
DANGER!
There is a risk of fatal electric shock when touching
electrical components.
◆ All connection and installation work must only
be carried out in a de-energised state.
◆ Disconnect all phases of the mains power cable
and secure it to prevent any reconnection.
◆ Check that the system is de-energised.
WARNING! WARNING!
There is a risk of fatal injury caused by short circuiting when
the DuoFern Room Thermostat 2 is overloaded.
The maximum switching capacity must not be exceeded, for
this, please observe the details in the technical specifications,
see page 34.
EN
39
8. Safety instructions for the electrical connection
i
WARNING! WARNING!
Using an incorrect installation housing can lead to
personal injury and damage to property (electric shocks /
short circuiting).
◆ Only use the installation housing provided to connect and
install the DuoFern Room Thermostat 2.
◆ Installation housings of other RADEMACHER products are
not compatible.
WARNING! WARNING!
Incorrect wiring may lead to short circuits and destroy the
device.
Follow the pin assignment detailed in the connection diagram.
EN
40
8.1 Important information prior to the electrical
6 mm
i
connection and installation
Potential-free relay output
The relay is potential-free. Control valves and controllers that require a different supply voltage can also be connected (e.g. 24 V).
One side of the relay contact should be set to the respective control
voltage (e.g. +24 V) instead of [ L ] in this case, see page 45.
Only switch extra-low voltage with basic insulation
Only extra-low voltages (ELV) with basic insulation may be
connected and switched.
Installation materials
The DuoFern Room Thermostat 2 is intended for flush mounting. We recommend installation in a deep 58 mm flush-mounted box or in an electronic socket.
Length of insulation stripped:
All leads must be stripped to 6 mm.
EN
41
8.1 Important information prior to the electrical
i
connection and installation
Optional connection of the external Remote Sensor 9485-F
The external Remote Sensor 9485-F
can optionally be connected for
temperature measurement if the
DuoFern Room Thermostat 2 is
installed in a thermally unfavourable
position.
Absolutely essential use of the external
Remote Sensor 9485-F
It is absolutely essential that the Remote Sensor 9485
is connected when using limiting functions
(heating mode 2 = room temperature controller with limiter).
Maximum length of lead to connect the external
Remote Sensor 9485-F
The maximum length of lead to connect the external Remote
Sensor 9485-F must not exceed 10 m.
EN
42
8.2 Electrical connection
i
1. Ensure the mains is disconnected and check whether the mains
power cables are current-free.
2. Securely lay all connecting cables right into the flush-mounted
box.
3. Remove the insulation on all leads down to 6 mm in length
and connect them according to the connection diagram on the
following pages.
4. After the electrical connection, the installation of the DuoFern
Room Thermostat 2 into the flush-mounted box is carried out,
see page 46.
EN
43
8.3 Connection diagram with a 230 V control valve
i
Remote Sensor 9485-F; optional
DuoFern Room
Thermostat 2
Type 9485-1
230 V / 50 Hz
EN
230 V
Electrothermal
control valve
44
8.4 Connection diagram with a 24 V control valve
i
Remote Sensor 9485-F; optional
230 V / 50 Hz
EN
24 V
Electrothermal
control valve
24 V
45
9. Installation after the electrical connection
i
1. Insert the installation housing into the flush-mounted box and
fasten it with the screws of the claw fasteners.
2. Place the frame on to the installation housing.
3. Place the spacer frame in the frame.
EN
4. Then carefully insert the operating unit into the installation
housing .
5. Switch on the mains power supply again.
46
10. Introduction to opening the menus and
M
OK
i
setting the functions
EN
1.
Open the main menu.
Pressing the menu button in the standard
display opens the main menu.
2. / Select the desired menu.
The selected menu is indicated
by a flashing symbol.
3.
Confirm and open the selected
menu.
OFF flashes.
47
10. Introduction to opening the menus and
OK
M
i
setting the functions
4. / Select the desired setting
(e.g. On).
EN
5.
6.
48
Each setting must be confirmed with the
OK button.
Back to the standard display.
Confirming the entry takes you to the
next setting or back to the menu.
Example
Pressing the menu button briefly
i
takes you back one menu step.
Pressing and holding the button
always take you to the standard
display.
11. Initial commissioning with the help of the
i
installation wizard
The installation wizard, which guides you through the first basic
settings, is automatically started for the initial commissioning or
after a software reset.
Continue with menu 9.7 "Installer settings"
The settings in menu 9.7 must be checked and adapted to the
existing heating installation after completing the installation
wizard, see page 81.
Readiness for operation
The DuoFern Room Thermostat 2 is ready for operation after
completing the settings mentioned above.
EN
49
11. Initial commissioning with the help of the
i
installation wizard
1. The installation wizard is shown after switching on the mains
voltage. The digits start flashing.
2. Set and confirm the current time.
3. Set the current date (day. month)‚
and confirm each setting.
4. Set and confirm the current year.
5. Set and confirm the starting time of
the first heating phase.
Factory setting = 06:00
Maximum number of daily heating phases
A maximum of six heating phases can be set up for each day,
see page 60, menu 2.
Pre-setting the week programme
The first starting time applies to the entire week ( MO...SO ).
If necessary, you can then select one of three week programmes
in menu 9.5, see page 79.
EN
50
11. Initial commissioning with the help of the
i
installation wizard
Assigning different target temperatures
Each heating phase can be assigned an individual target
temperature. You can set four target temperatures and assign
any number of heating phases, see page 60, menu 2.
6. Select and confirm the number of the
desired target temperature for this
heating phase.
7. Set and confirm the desired target
temperature.
Factory setting = 1.21.5 °C
8. Set and confirm the starting time of
the second heating phase.
Factory setting = 23:00
9. Select and confirm the number of the
desired target temperature for this
heating phase.
EN
10. Set and confirm the desired target
temperature.
Factory setting = 2.17.0 °C
51
11. Initial commissioning with the help of the
i
installation wizard
11. Set the starting time of the next
heating phase (see points 8 to 10.).
or
Exit the settings in the installation
wizard by selecting and confirming
.
12. The standard display is shown after
the final setting.
Example
13. The settings in menu 9.7 must be checked and adapted to
the local heating installation after completing the installation
wizard, see page 81.
EN
52
12. Manually changing the target temperature
+
-
OK
+
-
If necessary you can manually change the target temperatures
of the automatic heating phases temporarily. The change is
made on the standard display.
➤
(Hotter) Gradually increase the target temperature
by 0.5 °C.
➤
(Colder) Gradually reduce the target temperature
by 0.5 °C.
Display example:
The target temperature has been
manually changed.
The manual change only applies until the
i
next automatic heating phase becomes active
at the set switching time.
Resetting the manual change
EN
1 sec. Press the OK button on the standard display
for one second to reset the manual change.
The automatic mode with its set heating
phases and target temperatures then applies
again.
53
13. Switching automatic mode on/off directly
OK
OK
on the standard display
Automatic mode on
◆ All previously set automatic functions are active.
◆ Manual operation is also possible in automatic mode.
Automatic mode off
◆ All set automatic functions are deactivated.
EN
1.
54
1 sec. Press the OK button for one
second on the standard display.
If the target temperature was previously changed,
i
you have only reset the manual change of the target
temperature in the first step.
◆ Press the OK button again in this case to switch off
automatic mode.
Automatic mode on
Automatic mode off
14. Calling up and displaying weather data
The DuoFern Room Thermostat 2 can receive and display
weather data (temperature, brightness, wind velocity and rain)
from a DuoFern Environmental Sensor. It is not necessary to log
the DuoFern Environmental Sensor on to the DuoFern Room
Thermostat 2.
Environmental sensors update the weather data
approx. every 5 minutes and therefore it can take a
i
few minutes until the weather data is displayed.
◆ If no new weather data is received for
45 minutes, this is no longer available.
In the event that multiple DuoFern Environmental
i
Sensors are being received, the desired environmental
sensor can be selected in menu 9.9.4, see page 111.
1. As soon as an environmental sensor is detected,
the corresponding symbol is shown on the display.
EN
2. Pressing the SET button briefly displays
the first weather data.
55
14. Calling up and displaying weather data
EN
3. / You can call up all the available weather data
using the set buttons, see examples.
Temperature and
rain
Brightness
0 - 999 Lux = lx
1 - 150 kilo lux = klx
Symbol depending on the brightness:
< 50 lx = (dusk)
> 50 lx =
Wind velocity
0 - 35 m/s
Exiting the weather data display
4. Pressing the SET button briefly exits
the weather data display.
56
The display automatically
i
switches to the standard display
after 10 seconds.
15. Menu overview
M
Main menu
Symbol Menu Page
AUTO 1 Automatic mode ................................................ 59
2 Switching times / automatic heating phases .......60
SOLL 3 Target temperatures / numbers ..........................75
9 System settings ................................................. 77
SET 9.1 Time and date ...................................................78
9.5 Week programme ..............................................79
9.7 Installer settings ...............................................81
9.7.1 Heating mode ....................................................82
OFFSET 9.7.2 Sensor offset ..................................................... 86
H 9.7.3 Hysteresis and minimum on-time .......................87
9.7.4 Valve protection ................................................ 88
9.7.5 Frost protection ................................................89
9.7.6 Valve mode ....................................................... 90
SENSOR 9.7.7 Sensor test .......................................................92
EN
57
M
15. Menu overview
9.8 Device settings .................................................. 93
9.8.1 Automatic summer / winter changeover..............94
9.8.3 Display lighting .................................................95
9.8.5 Button lock .......................................................96
9.8.6 Holiday mode ................................................... 98
9.8.7 Party mode ..................................................... 100
9.8.0 Software version ............................................. 102
9.9 DuoFern settings ............................................. 103
9.9.1 Logging on and off........................................... 104
9.9.2 Setting the DuoFern mode ...............................108
Ch 9.9.3 Setting the transmission channel ..................... 110
9.9.4 Switching the weather data on/off ................... 111
IST 9.9.5 Displaying the DuoFern address (radio code) ....113
EN
Standardised menu structure
A standardised, cross-product menu structure has
i
been developed for all RADEMACHER devices.
Similar functions always have the same menu
number and therefore there may be gaps in the
numbering.
58
AUTO
OK
15.1 Menu 1 - Switching automatic mode on/off
Automatic mode on (symbol on the standard display)
◆ All set automatic functions are active
◆ Manual operation is also possible in automatic mode
Automatic mode off (symbol on the standard display)
◆ All automatic functions are deactivated
Both symbols on the standard display
◆ Automatic mode on and the target temperature has been
manually changed - the change applies to the next heating
phase
Switching automatic mode on/off in menu 1
1. Open menu 1.
2. Select and confirm the
desired setting.
OFF = Automatic mode off
On = Automatic mode on
EN
Toggling directly on the standard display
1 sec. Press the OK button for one
second on the standard display.
59
15.2 Menu 2 - Setting automatic heating phases
You can set automatic heating phases for each day with
the desired switching time and target temperature.
Maximum number of daily heating phases
A maximum of six heating phases can be set up for each day.
Pre-setting the week programme
First select the desired week programme in menu 9.5,
see page 79.
Additional information about the setting:
◆ The switching times of the heating phases are set in 15
minute steps (e.g. 06:00, 06:15, 06:30 etc.)
◆ A new heating phase cannot be set before the previous
heating phase
◆ Four adjustable target temperatures are stored. These can
be randomly assigned to the individual heating phases
◆ If the setting of a heating phase sequence should be
terminated, select and confirm the next switching time
with:
◆ The setting of the heating phases can also be
terminated by pressing and holding the SET button
EN
60
15.2 Menu 2 - Setting automatic heating phases
We show you three examples below for the setting of automatic
heating phases:
Example 1 Family programme
The automatic heating phases should apply
for the entire week (Mon - Sun) [MO - SO].
Example 2 Single household
The automatic heating phases should be
set separately for the weekdays (Mon - Fri)
[MO - FR] and the weekend (Sat - Sun) [SA -SO].
Example 3 Home office
Heating should only be provided on Friday
and Saturday.
EN
61
15.2 Menu 2 - Setting automatic heating phases
6:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 23:00
8:00
°C
Uhr
EN
Example 1 Setting (family programme)
The room temperature is regulated to the desired target
temperature or setback temperature at the same switching
times on all weekdays.
22
21
20
19
18
17
16
15
Heat up to
21.5 °C at 06:00
Lower temperature
to 17.5 °C at 23:00
MO. . . . . .SO (Monday. . . . . .Sunday)
Heating
phase
1 06:00 1 21.5 °C
Time
Target temperature (SOLL)
No. °C
2 23:00 2 17.5 °C
3
62
15.2 Menu 2 - Setting automatic heating phases
EN
1. First open menu 9.5 and set the week programme [ 1 ].
2. Then menu 2 opens automatically
or
Open menu 2 if the desired week programme is already active.
3. Set and confirm the starting time of
the first heating phase.
e.g. 06:00
4. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 1.
5. Set and confirm the desired target
temperature.
e.g. 21.5 °C
63
15.2 Menu 2 - Setting automatic heating phases
6. Set and confirm the starting time of
the second heating phase.
e.g. 23:00
7. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 2.
8. Set and confirm the desired target
temperature (e.g. setback temperature).
e.g. 17.0 °C
9. Terminate and confirm the setting of
the heating phases.
10. Subsequently the main menu is
displayed
or
EN
64
Menu 9.5.
15.2 Menu 2 - Setting automatic heating phases
6:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 23:00
8:00
°C
Uhr
EN
Example 2 Setting (single household)
The room temperature should be regulated to different temperatures at different times on weekdays and at the weekend.
22
21
20
19
18
17
16
15
= MONDAY ... FRIDAY
= SATURDAY / SUNDAY
MO. . . . FR (Monday . . . . Friday)
Heating
phase
1 06:00 1 21.5 °C
Time
Target temperature (SOLL)
No. °C
2 08:00 2 17.5 °C
3 14:30 1 21.5 °C
4 23:00 2 17.5 °C
5
65
15.2 Menu 2 - Setting automatic heating phases
SA SO (Saturday / Sunday)
Heating
phase
1 07:00 1 21.5 °C
2 23:00 2 17.5 °C
3
Time
Target temperature (SOLL)
No. °C
1. First open menu 9.5 and set the week programme [ 2 ].
2. Then menu 2 opens automatically
or
Open menu 2 if the desired week programme is already active.
EN
66
15.2 Menu 2 - Setting automatic heating phases
EN
3. Set and confirm the starting time of
the first heating phase.
e.g. 06:00
4. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 1.
5. Set and confirm the desired target
temperature.
e.g. 21.5 °C
6. Set and confirm the starting time of
the second heating phase.
e.g. 08:00
7. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 2.
8. Set and confirm the desired target
temperature (e.g. setback temperature).
e.g. 17.0 °C
67
15.2 Menu 2 - Setting automatic heating phases
EN
9. Set and confirm the starting time of
the third heating phase.
e.g. 14:30
10. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 1. *
11. Set and confirm the starting time of
the fourth heating phase.
e.g. 23:00
12. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 2. *
* The selected target temperatures cannot be
changed because they are already used as they
i
are already elsewhere in a heating phase.
13. Terminate and confirm the setting of
the heating phases for the weekdays
Monday - Friday (MO - FR).
68
15.2 Menu 2 - Setting automatic heating phases
Setting the heating phases for Saturday / Sunday (SA/SO)
EN
14. Set and confirm the starting time
of the first heating phase for
the weekend.
e.g. 07:00
15. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 1. *
16. Set and confirm the starting time
of the second heating phase for the
weekend.
e.g. 23:00
17. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 2. *
* The selected target temperatures cannot be
changed because they are already used as they
i
are already elsewhere in a heating phase.
69
15.2 Menu 2 - Setting automatic heating phases
EN
18. Terminate and confirm the settings for
the weekend Saturday/Sunday (SA /
SO).
19. Subsequently the main menu is
displayed
or
Menu 9.5.
70
15.2 Menu 2 - Setting automatic heating phases
6:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 23:00
8:00
°C
Uhr
EN
Example 3 Setting (home office)
Heating should only be provided on Friday and Saturday.
The room temperature should be regulated to the setback
temperature on all other days.
22
21
20
19
18
17
16
15
= MON / TUES / WED / THURS / SUN
= FRI / SAT
MO / DI / MI / DO + SO (Mo / Tues / Wed / Thurs + Sun)
Heating
phase
Time
Target temperature (SOLL)
No. °C
1
FR + SA (Friday + Saturday)
1 08:00 1 21.5 °C
2 21:00 2 17.5 °C
3
71
15.2 Menu 2 - Setting automatic heating phases
1. First open menu 9.5 and set the week programme [ 3 ].
2. Then menu 2 opens automatically
or
Open menu 2 if the desired week programme is already active.
3. Select and confirm
because heating should not be
provided on Monday.
4. Repeat point 3 for Tuesday, Wednesday and Thursday.
5. Set and confirm the starting time of
the first heating phase for Friday.
e.g. 08:00
EN
72
15.2 Menu 2 - Setting automatic heating phases
6. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 1.
7. Set and confirm the desired target
temperature.
e.g. 21.5 °C
8. Set and confirm the starting time of
the second heating phase for Friday.
e.g. 21:00
9. Select and confirm the number of the
desired target temperature for this
heating phase, e.g. 2.
10. Set and confirm the desired target
temperature.
e.g. 17.0 °C
EN
11. Repeat points 5 to 10.
for Saturday. *
* If the same target temperatures
are selected for this, they can no
longer be changed.
73
15.2 Menu 2 - Setting automatic heating phases
12. Select and confirm
because heating should not be
provided on Sunday.
13. Subsequently the main menu is
displayed
or
Menu 9.5.
EN
74
SOLL
15.3 Menu 3 - Setting target temperatures centrally
Target temperatures are configured and assigned in the installation wizard and in menu 2 "Setting automatic heating phases".
If the same target temperatures are used in different
heating phases, they can only be changed centrally
i
in menu 3.
Information about setting the target temperatures
◆ Four target temperatures are available that can be set
centrally
◆ Each target temperature can be randomly used,
e.g. as a comfort or setback temperature.
◆ Central changes to a target temperature affect all automatic
heating phases that use this target temperature
◆ The target temperatures can also be changed with the
HomePilot® through the advanced settings of the actuator
EN
75
SOLL
15.3 Menu 3 - Setting target temperatures centrally
Setting target temperatures centrally
1. Open menu 3.
2. Select and confirm the number of the
target temperature to be changed.
3. Change and confirm the
target temperature.
Setting range = 4.0 °C to 40 °C
4. Repeat points 1 to 3 if you want to change other
target temperatures.
EN
76
16. Menu 9 - System settings
This menu enables you to configure additional devices and system
settings to customise the DuoFern Room Thermostat 2 to your
individual preferences.
The DuoFern settings in menu 9.9 are introduced and described
separately from page 103 onwards.
Menu 9 - System settings
Symbol Menu Page
SET 9.1 Time and date ...................................................78
9.5 Week programme ..............................................79
9.7 Installer settings ...............................................81
9.8 Device settings .................................................93
9.9 DuoFern settings ............................................. 103
EN
77
SET
16.1 Menu 9.1 - Setting the time and date
1. Open menu 9.1.
Configure and confirm the desired
settings.
Setting order:
2. Time
3. Date
Day.Month
4. Year
2000 to 2099
EN
78
16.2 Menu 9.5 - Setting the week programme
You can adapt the automatic heating phases individually to the
weekly profile using the week programmes.
There are three week programmes available:
[ 1 ] Weekly switching times (factory setting)
The switching times of the automatic heating phases apply
from (Mon .... Sun) [MO .... SO] .
[ 2 ] Working day and weekend switching times
Separate switching times for (Mon .... Fri) [MO .... FR] and
(Sat + Sun) [SA + SO] .
[ 3 ] Individual day switching times
The switching times of the automatic heating phases can
be set for each individual weekday.
Once a week programme has been selected and
confirmed, menu 2 opens automatically to set the
i
heating phases.
EN
79
16.2 Menu 9.5 - Setting the week programme
1. Open menu 9.5.
2. Select and confirm the desired
week programme.
3. Menu 2 opens automatically to set the heating phases after
selecting a week programme, see page 61.
EN
80
16.3 Menu 9.7 - Installer settings
The settings in menu 9.7 must be checked and adapted to the
existing heating installation after completing the installation
wizard.
Menu 9.7 - Installer settings
Symbol Menu Page
9.7.1 Heating mode ....................................................82
OFFSET 9.7.2 Sensor offset ..................................................... 86
H 9.7.3 Hysteresis and minimum on-time .......................87
9.7.4 Valve protection ................................................ 88
9.7.5 Frost protection ................................................89
9.7.6 Valve mode ....................................................... 90
SENSOR 9.7.7 Sensor test .......................................................92
EN
81
16.4 Menu 9.7.1 - Setting the heating mode
You can set the DuoFern Room Thermostat 2 for one of the
following heating modes.
There are three heating modes available:
[ 1 ] Room temperature controller (factory setting)
The heating is switched on when the room temperature
drops below the set target temperature.
[ 2 ] Room temperature controller with limiter
This function can be used for floor heating with particularly
sensitive floor coverings. Excessive cooling of the floor can
also be prevented with additional heat sources (e.g. fireplace)
by defining a minimum floor temperature. It is absolutely
essential to connect the device to the external Remote Sensor
9485-F for this heating mode.
The heating is switched on when the room temperature
drops below the set target temperature. The room
temperature is measured with the internal sensor.
The floor temperature is measured by the external Remote
Sensor 9485-F regardless of the room temperature. The set
minimum and maximum floor temperature is taken into
account in the heating control and limited accordingly.
[ 3 ] Cooling function
The air conditioning is switched on when the room
temperature exceeds the set target temperature.
EN
82
Additional parameters must be set in each
heating mode.
i
16.4 Menu 9.7.1 - Setting the heating mode
EN
1. Open menu 9.7.1.
2. Continue with the desired heating mode.
2.1 Heating mode [ 1 ] - Setting the room temperature controller.
2.2 Select and confirm the heating mode
[ 1 ].
2.3 Select and confirm the internal [ I ] or
external [ E ] temperature sensor.
83
16.4 Menu 9.7.1 - Setting the heating mode
EN
2.1 Heating mode [ 2 ] - Setting the room temperature controller
with limiter.
2.2 Select and confirm the heating mode
[ 2 ].
2.3 Set and confirm the limiting value for
the minimum floor temperature.
Setting range = 10°C to 30 °C
Factory setting = OFF
The setting is undertaken in steps of
1.0 °C.
2.4 Set and confirm the limiting value for
the maximum floor temperature.
Setting range = 20°C to 40 °C
Factory setting = 35 °C
The setting is undertaken in steps of
1.0 °C.
84
If both a minimum and maximum temperature
limit are set, the limiting values must be at least
i
5 °C apart.
◆ An incorrect setting is automatically corrected by
the controller.
16.4 Menu 9.7.1 - Setting the heating mode
2.1 Heating mode [ 3 ] - Setting the cooling function.
2.2 Select and confirm the heating
mode [ 3 ].
2.3 Select and confirm the internal [ I ]or
external [ E ] temperature sensor.
EN
85
OFFSET
16.5 Menu 9.7.2 - Setting the sensor offset
The temperature measured on site can vary from the room
temperature if the DuoFern Room Thermostat 2 is installed in a
unfavourable position (e.g. behind a curtain or on a cool exterior
wall).
Setting range
An adjustment of the measurement in the range of - 5°C to + 5 °C
can be carried out using the sensor offset. The setting is undertaken in steps of 0.1°C.
1. Open menu 9.7.2.
2. Set the offset for the internal
temperature sensor.
e.g. -1.5 °C
3. Set the offset for the external
temperature sensor.
e.g. 0.5 °C
EN
86
16.6 Menu 9.7.3 - Setting the hysteresis /
H
minimum on-time
This function prevents an unnecessary large number of
switching operations by setting a minimum on-time for the
relay. This prevents the DuoFern Room Thermostat 2
tripping too often if the room temperatures fluctuate.
1. Open menu 9.7.3.
2. Set the hysteresis.
Setting range = 0.1°C to 5 °C
Factory setting = 0.2°C
3. Set the minimum on-time.
Setting range = 1 minute to
10 minutes
Factory setting = 2
EN
87
16.7 Menu 9.7.4 - Setting the valve protection
If an electrothermal control valve (e.g. for floor heating) is not
activated for a longer period of time (e.g. in summer),
it may get stuck.
Prevent the control valve getting stuck with the "Valve
protection" function.
The valve is switched on for a set time at 10:00 if it has not been
activated for longer than 3 days (>72 hours).
1. Open menu 9.7.4.
2. Switch on the valve protection.
On = Valve protection on
OFF = Valve protection off
3. Set the minimum on-time.
e.g. 3 minutes
EN
88
16.8 Menu 9.7.5 - Setting the frost protection
The "Frost protection" function switches the heating on when
the minimum temperature has been reached. The function is
independent of the set target temperatures.
1. Open menu 9.7.5.
2. Switch on the frost protection.
On = Frost protection on *
OFF = Frost protection off
3. Set the minimum temperature at
which the heating is switched on.
e.g. 4.0 °C *
Factory setting = On; 4.0 °C
Setting range = 2.0 °C - 10 °C
EN
89
16.9 Menu 9.7.6 - Setting the valve mode
Electrothermal valves with the switching states "normally closed
(NC)" or "normally open (NO)" are often used for heating control.
You can set the respective valve mode in menu 9.7.6 to adapt to
the control valve used in each case:
[ NC ] Valve mode normally closed
The control valve remains closed in an isolated,
de-energised state.
[ NO ] Valve mode normally open
The control valve remains open in an isolated,
de-energised state.
The set valve mode also applies to DuoFern
actuators connected via radio.
i
EN
90
-
+
16.9 Menu 9.7.6 - Setting the valve mode
1. Open menu 9.7.6.
2. Switch on the valve protection.
nc = normally closed
no = normally open
Switch off the relay if the control valve is regulated by a
Duofern actuator.
If the control valve is regulated solely by a DuoFern actuator or
the DuoFern Room Thermostat 2 only controls radiator actuators,
you can switch off the relay to avoid annoying switching noises.
5 sec. Press the minus button for 5 seconds
to switch the relay off.
Display when the relay is switched off:
– no or – nc
5 sec. Press the plus button for 5 seconds
to switch the relay on.
EN
91
16.10 Menu 9.7.7 - Performing a sensor test
It is possible to view the readings of the temperature sensors
(internal and external) to check the installation.
1. Open menu 9.7.7.
2. Select and display the desired
temperature sensor.
Example: The internal temperature
sensor measures 21.9 °C.
Example:
The external Remote Sensor 9485-F
measures 19.8 °C.
Example:
The external Remote Sensor 9485-F
is incorrect or not connected.
EN
92
17. Menu 9.8 - Device settings
Menu 9.8 - Device settings
Symbol Menu Page
9.8.1 Automatic summer / winter changeover..............94
9.8.3 Display lighting .................................................95
9.8.5 Button lock .......................................................96
9.8.6 Holiday mode ................................................... 98
9.8.7 Party mode ..................................................... 100
9.8.0 Software version ............................................. 102
EN
93
17.1 Menu 9.8.1 - Switching the automatic
summer/ winter time on/off
The DuoFern Room Thermostat 2 features an automatic summer/winter changeover function.
Summer time
The timer is changed to summer time on the last Sunday in
March. The timer is set back one hour at 02:00.
Winter time
The timer is changed to winter time (standard time) on the last
Sunday in October. The timer is set back one hour at 03:00.
Recommendation for operating the device outside Germany
If the DuoFern Room Thermostat 2 is not being used in
Germany, it may be necessary to switch off the automatic
summer/winter changeover function.
1. Open menu 9.8.1.
2. Switch the summer/winter
changeover function on/off and
confirm.
OFF = Function off
On = Function on
EN
94
17.2 Menu 9.8.3 - Setting the display lighting
Pressing one of the operating buttons switches the background
lighting on the display on and off after a predetermined time.
◆ After 10 seconds on the standard display
◆ After approx. 1 minute in the menus
You can set the desired brightness level if the background lighting should remain permanently lit up in an idle state (without
pressing a button).
1. Open menu 9.8.3.
2. Set and confirm the desired
brightness levels.
0 = Switch off the permanent
display lighting
1 = Weak brightness
2 = Average brightness
3 = Maximum brightness
EN
95
17.3 Menu 9.8.5 - Switching the button lock on/off
You can activate the automatic button lock to protect against
any unintentional input.
1. Open menu 9.8.5.
2. Switch the button lock on/off
and confirm.
OFF = Button lock off
On = Button lock on
Automatic activation after approx. two minutes
If the button lock is activated and no buttons are pressed
within a period of two minutes, the button lock is switched
on automatically.
If an attempt is made to call up the menu when the button lock
is active, the display flashes.
EN
96
17.3 Menu 9.8.5 - Switching the button lock on/off
The button lock is deactivated manually
on the standard display
4 sec. Press and hold for 4 seconds.
The button lock is activated manually
on the standard display before the time limit expires
4 sec. Press and hold for 4 seconds if you want to
activate the automatic button lock before the
two minutes expire.
Manual operation of the DuoFern Room Thermostat
i
2 is also possible when the button lock is active.
EN
97
17.4 Menu 9.8.6 - Setting the holiday mode incl. the setback temperature
You can switch on a holiday mode and set the desired setback
temperature on the DuoFern Room Thermostat 2. The holiday
mode can then be directly activated on the standard display.
The heating is regulated to the setback temperature when the
holiday mode is activated.
1. Open menu 9.8.6.
2. Switch the holiday mode on/off and
confirm.
OFF = Holiday mode off
On = Holiday mode on
3. Set and confirm the
setback temperature.
e.g. 17.0 °C
EN
98
17.4 Menu 9.8.6 - Setting the holiday mode incl.
-
-
the setback temperature
Activating the setback temperature temporarily on the
standard display
1 sec. Press and hold for 1 second
to temporarily activate the setback
temperature.
The heating is regulated to the setback
temperature until the next automatic heating
phase becomes active.
Manual mode
The hand symbol is shown if you press the
button briefly.
Activating the setback temperature permanently on the
standard display (holiday mode)
4 sec. Press and hold for 4 seconds
to permanently activate the setback
temperature (holiday mode). The automatic
heating phases have been deactivated.
Automatic mode off
The clock symbol disappears when you press
and hold the button.
EN
99
17.5 Menu 9.8.7 - Setting the party mode incl. the comfort temperature
You can switch on a party mode and set the desired comfort
temperature on the DuoFern Room Thermostat 2. The party
mode can then be directly activated on the standard display.
The heating is regulated to the comfort temperature when the
party mode is activated.
1. Open menu 9.8.7.
2. Switch the party mode on/off and
confirm.
OFF = Party mode off
On = Party mode on
3. Set and confirm the comfort
temperature.
e.g. 21.5 °C
EN
100
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