Siemens RDF800KN User manual

RDF800KN.., RDD810KN/NF RDF800KN/VB
Touchscreen flush-mount
room thermostats with KNX communications
RDF800KN.., RDF800KN/VB, RDD810KN/NF
Basic documentation
CE1P3174en
2020-02-21 Smart Infrastructure

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Table of contents
1. About this document...........................................................................4
1.1 Revision history.....................................................................................4
1.2 Reference documents............................................................................4
1.3 Before you start.....................................................................................5
1.3.1 Copyright...............................................................................................5
1.3.2 Quality assurance..................................................................................5
1.3.3 Document use/request to the reader......................................................5
1.4 Target audience, prerequisites...............................................................6
1.5 Conventions used in this document........................................................6
1.6 Glossary................................................................................................6
2. Summary..............................................................................................7
2.1 Types ....................................................................................................7
2.2 Ordering................................................................................................7
2.3 Functions...............................................................................................7
2.4 User interface........................................................................................9
2.5 Integration with KNX bus .....................................................................10
2.6 Equipment combinations......................................................................12
2.7 Accessories.........................................................................................13
3. Functions ...........................................................................................14
3.1 Room temperature control...................................................................14
3.2 Operating modes.................................................................................15
3.2.1 Influencing the operating mode............................................................18
3.2.2 Communication example......................................................................21
3.3 Room temperature setpoints................................................................23
3.3.1 Description ..........................................................................................23
3.3.2 Setting and adjusting setpoints ............................................................25
3.4 Applications overview ..........................................................................26
3.4.1 Applications for fan coil systems (RDF800KN.., RDF800KN/VB only)...28
3.4.2 Applications for universal systems (RDF800KN.., RDF800KN/VB only)29
3.4.3 Applications for heat pump systems (RDF800KN.., RDF800KN/VB only)30
3.4.4 Applications for heating (RDD810KN/NF only).....................................31
3.5 Additional functions..............................................................................32
3.6 Control sequences...............................................................................35
3.6.1 Sequences overview using P01 (RDF800KN.., RDF800KN/VB only)....35
3.6.2 Application mode.................................................................................36
3.6.3 2-pipe fan coil unit (RDF800KN.., RDF800KN/VB only)........................38
3.6.4 2-pipe fan coil unit with electric heater (RDF800KN.., RDF800KN/VB
only)....................................................................................................39
3.6.5 4-pipe fan coil unit (RDF800KN.., RDF800KN/VB only)........................41
3.6.6 Chilled/heated ceiling and radiator applications (RDF800KN..,
RDF800KN/VB only)............................................................................41
3.6.7 Compressor applications (RDF800KN.., RDF800KN/VB only)..............42
3.6.8 Setpoints and sequences (RDF800KN.., RDF800KN/VB only).............42
3.6.9 Heating (RDD810KN/NF only) .............................................................43
3.7 Control outputs....................................................................................44
3.7.1 Overview.............................................................................................44
3.7.2 Control outputs configuration (using the DIP switches or the tool)
(RDF800KN.., RDF800KN/VB only).....................................................45

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3.8 Fan control (RDF800KN.., RDF800KN/VB only)...................................46
3.9 Multifunctional input, digital input..........................................................50
3.10 Handling faults.....................................................................................52
3.11 KNX communications...........................................................................53
3.11.1 S-mode................................................................................................53
3.11.2 LTE mode............................................................................................53
3.11.3 Zone addressing in LTE mode (in conjunction with Synco)...................54
3.11.4 Example of heating and cooling demand zone .....................................56
3.11.5 Send heartbeat and receive timeout.....................................................56
3.11.6 Startup.................................................................................................57
3.11.7 Heating and cooling demand................................................................57
3.11.8 Fault function on KNX..........................................................................57
3.12 Communication objects (S-mode)........................................................59
3.12.1 RDF800KN.., RDF800KN/VB Overview ...............................................59
3.12.2 RDD810KN/NF Overview.....................................................................60
3.12.3 Description of communication objects..................................................61
3.13 Communication objects (LTE mode).....................................................63
3.13.1 RDF800KN.., RDF800KN/VB Overview ...............................................63
3.13.2 RDD810KN/NF Overview.....................................................................64
3.14 Control parameters..............................................................................65
3.14.1 Setting parameters using the local HMI................................................65
3.14.2 Setting and downloading parameters using the tools............................66
3.14.3 Service level parameters......................................................................67
3.14.4 Expert level parameters with diagnostics and test................................68
4. Handling.............................................................................................71
4.1 Mounting and installation .....................................................................71
4.2 Commissioning....................................................................................72
4.3 Operation.............................................................................................75
4.3.1 Alarm/Service reminder........................................................................75
4.3.2 Heating/cooling manual changeover (RDF800KN.., RDF800KN/VB only)75
4.3.3 INFO page...........................................................................................76
4.4 Remote operation................................................................................76
4.5 Disposal ..............................................................................................76
5. Supported KNX tools.........................................................................77
5.1 ETS.....................................................................................................77
5.1.1 Commissioning – downloading using ETS............................................77
5.1.2 Parameter settings in ETS...................................................................78
5.2 ACS.....................................................................................................78
5.2.1 Parameter settings in ACS...................................................................79
5.2.2 Operation and monitoring with ACS......................................................80
5.2.3 Operation and monitoring with OZW772 web server.............................83
5.2.4 Operation and monitoring with RMZ792-B bus operator unit.................83
6. Connection.........................................................................................84
6.1 Connection terminals...........................................................................84
6.2 Connection diagrams...........................................................................85
7. Mechanical design.............................................................................86
7.1 General ...............................................................................................86
7.2 Dimensions..........................................................................................87
8. Technical data....................................................................................90

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1. About this document
1.1 Revision history
Edition Date Changes Section Pages
04 2020-02-21 ·Update KNX interface
·RDF800KN/VB 4.2 all 72 all
03 2017-02-17 ·Update condensation monitor
·Update heartbeat 2.6 3.11.5 12 57
02 2015-06-08 Minor changes and corrections all -
01 2014-11-20 First edition - -
1.2 Reference documents
Subject
Ref
Doc
no.
Description
Touchscreen flush-mount
room thermostats with KNX
communications
[1] CE1B3174.1xx
CE1B3174.2xx RDF800KN.., RDF800KN/VB and RDD810KN/NF User Manuals
[2] CE1N3174 RDF800KN.., RDF800KN/VB Data Sheet
[3] CE1N3175 RDD810KN.. Data Sheet
KNX Manual [4] Handbook for Home and Building Control – Basic Principles
(http://www.knx.org/knx-en/training/books-documentation/knx-association-
books/index.php)
Synco and KNX (see
www.siemens.com/synco
)[5] CE1N3127 KNX bus, Data Sheet
[6] CE1P3127 Communication via the KNX bus for Synco 700, 900 and
RXB/RXL, Basic Documentation
[7] XLS template in
HIT Planning and commissioning protocol, communication Synco 700
[8] CE1N3121 RMB795B central control unit, Data Sheet
[9] CE1Y3110 KNX S-mode data points
[10] -- Product data for ETS
[11] CE1J3110 ETS product data compatibility list
[12] 0-92168en Synco Application Manual
Desigo
Engineering Documents [13] CM1Y9775 Desigo RXB integration – S-mode
[14] CM1Y9776 Desigo RXB/RXL integration – Individual Addressing
[15] CM1Y9777 Third-party integration
[16] CM1Y9778 Synco integration
[17] CM1Y9779 Working with ETS

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1.3 Before you start
1.3.1 Copyright
This document may be duplicated and distributed only with the express permission
of Siemens, and may be passed only to authorized persons or companies with the
required technical knowledge.
1.3.2 Quality assurance
This document was prepared with great care.
·The contents of this document are checked at regular intervals.
·Any corrections necessary are included in subsequent versions.
·Documents are automatically amended as a consequence of modifications and
corrections to the products described.
Please make sure that you are aware of the latest document revision date.
If you find lack of clarity while using this document, or if you have any criticisms or
suggestions, please contact the Product Manager in your nearest branch office.
The addresses of the Siemens Regional Companies are available at
www.buildingtechnologies.siemens.com.
1.3.3 Document use/request to the reader
Before using our products, it is important that you carefully read the entire
documents supplied with or ordered within the products (equipment, applications,
tools, etc.).
We assume that persons using our products and documents are authorized and
trained appropriately and have the technical knowledge required to use our
products as intended.
More information on the products and applications is available at:
·On the intranet (Siemens employees only) at
https://workspace.sbt.siemens.com/content/00001123/default.aspx
·From the Siemens branch office near you
www.buildingtechnologies.siemens.com or from your system supplier
·From the support team at headquarters [e-mail] if
there is no local point of contact.
Siemens assumes no liability to the extent allowed under the law for any losses
resulting from a failure to comply with the aforementioned points or for the
improper compliance of the same.

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1.4 Target audience, prerequisites
This document assumes that users of the
RDF800KN../RDF800KN/VB/RDD810KN.. thermostats are familiar with the ETS
and/or SyncoACS tools and can use them.
It is also assumed that these users are aware of the specific conditions associated
with KNX.
In most countries, specific KNX know-how is conveyed through training centers
certified by the KNXAssociation (see www.knx.org/).
For reference documentation, see section 1.2.
1.5 Conventions used in this document
Throughout this document, parameters are specified as P[parameter number].
For example, P30.
1.6 Glossary
The inputs, outputs and parameters of an application can be influenced in various
ways. These are identified by the following symbols in this document:
Parameters identified by this symbol are set using ETS.
Parameters identified by this symbol are set usingACS.
The setting of RDF800KN../RDF800KN/VB/RDD810KN.. parameters is only
supported by the following tool versions:
– ETS4 or higher
– ACS version 8.28 or higher
Inputs and outputs identified by this symbol communicate with other KNX devices.
They are called communication objects (CO).
The communication objects of the RDF800KN../RDF800KN/VB/RDD810KN.. room
thermostats work partly in S-mode, partly in LTE mode, and partly in both. These
objects are described accordingly.
A list of the parameters is shown in section 3.14.
ETS
ACS
STOP Note!

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2. Summary
2.1 Types
Product no. Stock no. Application Operating
voltage
Control outputs Suitable for
On/Off 3-pos
RDF800KN S55770-T350 Fan coil,
universal
heat pump
AC 230 V
21) 11) Round or square
conduit boxes
RDF800KN/VB S55770-T429 Fan coil,
universal
heat pump
21) 11) Round or square
conduit boxes
RDF800KN/NF2) S55770-T335 Fan coil,
universal
heat pump
21) 11)
Square conduit
boxes 2)
RDD810KN/NF2) S55770-T336 Heating 13) -
1) Select: On/Off or 3-position.
2) Mounting frames are not included and must be ordered separately. See section 2.7.
3) On/Off output with potential free input from AC 24…230 V
2.2 Ordering
·When ordering, please indicate product no., SSN no. and name:
For example: RDF800KN (S55770-T350) room thermostat.
·Separate mounting frames must be ordered for RDF800KN/NF and
RDD810KN/NF installation (see section 2.7).
·Order valve actuators separately.
2.3 Functions
Fan coil units using On/Off or modulating control outputs:
·2-pipe system
·2-pipe system with electric heater
·4-pipe system
Chilled or heated ceilings (or radiators) using On/Off or modulating control
outputs:
·Chilled or heated ceiling
·Chilled or heated ceiling and radiator/under floor heating
Compressors using On/Off control outputs:
·1-stage compressors in DX- type equipment
·1-stage compressors in DX- type equipment with electric heater
The room thermostats are delivered with a fixed set of applications.
The relevant application is selected and activated during commissioning using one
of the following tools:
·Synco ACS
·ETS
·Local DIP switch and the HMI
Heating using On/Off control outputs:
·Floor heating/radiators
·Wall-hung boilers
Use of RDF800KN..,
RDF800KN/VB
Use
of
RDD810KN
/NF

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·Operating modes: Comfort, Economy and Protection
·Backlit display
·AC 230 V operating voltage
In addition for RDF800KN.., RDF800KN/VB:
·On/Off or 3-position control outputs (relay)
·Output for 1- or 3-speed fan
·Automatic or manual heating/cooling changeover
In addition for RDD810KN/NF:
·Potential-free contact (SPDT) for heating
·RDF800KN, RDF800KN/VB: Round CEE/VDE conduit boxes, with minimum 60
mm diameter or recessed square conduit boxes with 60.3 mm fixing centers,
minimum 40 mm depth
·RDF800KN/NF and RDD810KN/NF: Recessed square conduit boxes with 60.3
mm fixing centers, minimum 40 mm depth
·Room temperature control via built-in temperature sensor or external room
temperature or return air temperature sensor
·Operating mode selected using touchscreen
·Temporary Comfort mode extension
·Display of current room temperature or setpoint in °C or °F
·Minimum and maximum limitation of room temperature setpoint
·"Screen lock" function: Unlock, total lock and setpoint
·Two multifunctional inputs, selectable for:
– Window contact
– Presence detector
– External room temperature or return air temperature sensor
– Fault input
– Monitor input for temperature sensor or switch state
– Sensor for automatic heating or cooling changeover (RDF..)
– Dew point sensor (RDF..)
– Electric heater enable (RDF..)
·Floor heating temperature limitation (P51)
·Reload factory settings for commissioning and control parameters
·Wizard function for easy commissioning using the HMI
In addition for RDF800KN.., RDF800KN/VB:
·Changeover between heating and cooling mode (automatic using local sensor
or bus or manually)
·Selection of applications using the DIP switches or the tool
·1- or 3-speed fan control (automatic or manually)
·Advanced fan control function, for example, fan kick, fan start, selectable fan
operation (enable, disable or depending on heating or cooling mode)
·Purge function with 2-port valve in a 2-pipe changeover system
·Reminder to clean fan filters (P62)
Features
Type of mounting/
suitable conduit boxes
Functions

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2.4 User interface
The RDF800KN.., RDF800KN/VB and RDD810KN/NF room thermostats have a
touchscreen (segment type) user interface. The thermostat displays only the room
temperature value or any alarm in Screen Saver mode.
To start any operation or change settings, touch the screen to display all available
operating icons available in Selection Screen mode. Ten seconds after the last
operation, the thermostat returns to Screen Saver mode.
Status icons:
Screen lock Manual override
Alarm/Service reminder Cooling active
Scheduler via bus Heating active
Fan active Auxiliary heat active
Selection icons:
Room temperature Comfort mode
Outdoor temperature Economy mode
Protection mode
Operating icons:
+

Increment, decrement OR selection
  Selection OR move to next items
Temperature OR parameter values, and etc.
Time clock (12/24 hour), parameter number OR
password, etc.
Setpoint mode (room temperature only)
Fan mode OR fan speed mode
Operating mode
Setting mode
Operations Function
Touch to select setpoint mode; adjust temperature value
using
+
/
–
.
Touch
to select fan mode; adjust fan speed using +/–.
Touch to select operating mode; select ON/ECO/OFF
using +/–.
Touch to select the INFO screen, display room & outdoor
temperature
s
using

/

if available.
to select the desired H/C control sequence using +/– if manual
H/C changeover (P01
=
2) is selected
.
to display alarms if the icon is displayed; use /icon to
select different alarms for viewing.
Touch
for
5
seconds
to select programming mode (KNX).
Touch
for 5 seconds
to select parameter mode (Service/Expert level).
Touch
s
creen
d
isplay
Touch
o
peration

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2.5 Integration with KNX bus
The touchscreen room thermostats can be integrated as follows:
·Into Synco living using group addressing (ETS)
·Into Desigo using group addressing (ETS) or individual addressing
·Into third-party systems using group addressing (ETS)
·With Synco 700 system using LTE mode (easy engineering)
The following KNX functions are available:
·Central time program and setpoints. For example, when using the RMB795B
central control unit.
·Outdoor temperature or time of day displayed on thermostat using the bus
·Remote operation and monitoring. For example, using the RMZ792-B bus
operator unit.
·Remote operation and monitoring with web browser using the OZW772 web
server.
·Maximum energy efficiency due to exchange of relevant energy information. For
example, with Synco 700 controllers, heating demand, cooling demand.
·Alarming (such as, external fault contact, condensation, or clean filter).
·Monitoring input for temperature sensor or switch.
Engineering and commissioning can be done using…
·local DIP switches/HMI
·Synco ACS service tool
·ETS
The touchscreen room thermostats are tailored for interoperation with the Synco
700 system and operate together in LTE mode. This extends the field of use of
Synco for individual room control in conjunction with fan coil units, heating units,
chilled ceilings and radiators.
Synco 700

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Synco 700 Building automation and control system (BACS)
Synco living Room automation and control system
RDF800KN..,
RDF800KN/VB
RDD810KN/NF
Room thermostats
OZW772 Web server
RMZ792-B Bus operator unit
QAW... Room unit
ACS ]
Engineering and Service tool
OCI702 Interface for ACS
RXB, RXL Room controllers
QAX Room unit for RXB/RXLroom controllers
The KNX communicating devices can be integrated into the Siemens building
automation and control systems (BACS) Desigo or third-party systems. For
integration, you can use either S-mode (group addressing) or individual
addressing.
Synco topology
Legend
Desigo and third-party
systems

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2.6 Equipment combinations
Description
Product no.
Data
S
heet
Cable temperature sensor or
changeover sensor, cable length
2.5 m
NTC (3 kWat 25 °C)
QAH11.1 1840
Room temperature sensor
NTC (3 kWat 25 °C) QAA32 1747
Cable temperature sensor,
cable length 4 m
NTC (3 kWat 25 °C) QAP1030/UFH 1854
Condensation monitor QXA2100/
QXA2101 A6V10741072
Electromotoric On/Off actuator SFA21.. 4863
Electromotoric On/Off valve and
actuator (only available in AP,
UAE, SA and IN) MVI../MXI.. A6V11251892
Zone valve actuator (only available
in AP, UAE, SA and IN) SUA.. 4832
Thermal actuator (for radiator
valve) STA23.. 4884
Thermal actuator
(for small valves 2.5 mm) STP23.. 4884
Electrical actuator, 3-position
(for radiator valve) SSA31.. 4893
Electrical actuator, 3-position
(for small valve 2.5 mm) SSP31.. 4864
Electrical actuator, 3-position
(for small valve 5.5 mm) SSB31.. 4891
Electrical actuator, 3-position
(for 2- and 3-port valves/V..P45) SSC31.. 4895
Electrical actuator, 3-position
(for small valve 5.5 mm) SSD31.. 4861
Electromotoric actuator, 3-position
(for small valves 5.5 mm) SQS35.. 4573
Notes: For the maximal number of actuators operating in parallel, refer to information in the
Data Sheets of the selected actuators and the following information, depending on
which value is lower:
·Parallel operation of max 6 SS.. actuators (3-position) is possible.
·Parallel operation of max 10 On/Off actuators is possible.
·
Parallel operation of SQS35 is not possible.
On/Off actuators
3-position actuators

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2.7 Accessories
Description Product no./SSN no. Data
S
heet
Changeover mounting kit
(50 pcs per package) ARG86.3 N3009
Plastic mounting spacer for
RDF800KN, RDF800KN/VB to
increase the headroom in the
conduit box by
10 mm
ARG70.3 N3009
Conduit box for RDF800KN/NF and
RDD810KN/NF ARG71/S55770-T137 N3009
Single mounting frame*), ivory white
(for RDF800KN/NF and RDD810KN/NF only) ARG800.1/ S55770-T370 --
KNX power supply 160 mA
5WG1 125
-
1AB0
2
--
KNX power supply 320 mA
5WG1 125
-
1AB1
2
--
KNX power supply 640 mA
5WG1 125
-
1AB2
2
--
*) See the dimensions of mounting frame on page 89.

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3. Functions
3.1 Room temperature control
Information for setting the control parameters (e.g. P01) is described in
section 3.14.
The thermostat acquires the room temperature using its built-in sensor, external
room temperature sensor (QAA32), or external return air temperature sensor
(QAH11.1), and maintains the setpoint by delivering actuator control commands to
the heating and/or cooling equipment. The following control outputs are available:
·On/Off control (2-position)
·Modulating PI/P control with 3-position control output
(only for RDF.. types, 2-pipe applications)
The switching differential or proportional bandis 2 K for heating mode and 1 K for
cooling mode (adjustable via P30 and P31).
The integral action time for modulating PI control is 45 minutes (RDF..), adjustable
via P35.
The display shows the acquired room temperature or the Comfort setpoint, which is
selected using P06. The factory setting displays the current room temperature.
Use P04 to change the room temperature display from °C to °F as needed.
The acquired room temperature (built-in or external sensor) is also available as
information on the bus.
·With automatic changeover or continuous heating/cooling, the icons / on
the top line of the screen indicate that the system currently operates in heating
or cooling mode (heating or cooling output activated).
·With manual changeover (P01 = 2), Hor Cdisplays on the INFO page and
indicates that the system currently operates in heating or cooling mode. For
more information, refer to section 4.3.2.
If the outdoor temperature is available, press the icon on the INFO page shown
below, and then use and to select the outdoor temperature. This temperature
value has only information character.
In LTE mode, the outdoor temperature can only be received in outdoor temperature
zone 31.
In S-mode, the corresponding communication object needs to be bound with a
KNX sensor device.
General note:
P
arameters
Room temperature
control
Display
Room temperature
/
Outdoor temperature
using the bus

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Time of day via bus can be displayed on the 2nd line of the LCD display on the
thermostat by setting P07 to either 3 or 4. The display is either in 12- or 24-hour
format.
The information can be received from a Synco controller with time master
functionality or any other KNX device if the corresponding communication object is
bound.
When an application program is downloaded to the Synco devices using ETS, the
correct group addresses must be downloaded as well to display the time of day on
the thermostat. (see Synco Knowledge Base - KB771).
3.2 Operating modes
The thermostat's operating modes can be influenced in different ways (see below).
Specific heating and cooling setpoints are assigned to each operating mode.
In Comfort or Economy mode, the Screen Saver mode normally displays the room
temperate as follows:
When you touch the temperature display, the Selection Screen displays (see figure
on the left side below).
Touch the icon to display the current operating mode. Use +/–to change the
operating mode between Comfort (ON), Economy (ECO) or Protection (OFF).
In Protection mode, the Screen Saver mode displays OFF:
Time of day via bus
Note
:
Comfort and Economy
modes
Protection mode

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When you touch OFF, the thermostat changes to ON first and then returns to
Comfort or Economy mode. Then it displays the setpoint adjustment screen.
Touch +/–to adjust the room temperature setpoint.
·In Economy mode, the icon does not display since the setpoint is not
adjustable.
·In Protection mode, both the and icons do not display since both
setpoint and fan speed are not adjustable.
·On universal applications (P52 = 0), the icon does not display.
The thermostat sends the effective room operating mode on the bus.
The following operating modes are available:
In Auto Timer mode, the operating mode is set using the bus only.
If no time scheduler is present, Auto Timer is replaced by Comfort.
In Comfort mode, the thermostat maintains the Comfort setpoint.
This setpoint can be defined using P08, P09 and P10. It also can be locally
adjusted using +/–after touching the icon or using the bus.
In Comfort mode, touch the icon to set the fan speed to either automatic (A -
AUTO) or manual fan speed (1/2/3).
The thermostat switches to Comfort mode when the presence detector (local or on
KNX) is active (room is occupied). See note*).
In Economy mode, the setpoints (less heating or cooling than in Comfort mode)
can be defined using P11 and P12.
The thermostat switches to Economy mode when...
·you touch the icon to go to the operating mode page and use +/–to select
ECO (only if P02 is set to 2)
·Economy is sent using the bus
·presence detection is not active (room unoccupied)
In Protection mode, the system is protected against…
– frost (factory setting 8 °C, can be disabled or changed using P65)
– overheating (factory setting OFF, can be enabled or changed using P66)
No other operating mode can be selected locally if Protection mode is commanded
using the bus. OFF is displayed.
The thermostat switches to Protection mode when...
·OFF is selected using +/-after touching the icon
·Protection is sent using the bus
Note
s
:
Room operating mode:
State
Auto Timer
Comfort
Presence detector
Economy
Protection
Room operating mode:
Window state

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·the window contact is active (open window)
·"Window state" is sent using the bus, e.g. from a KNX switch. See note*).
*) Refer to section 3.2.1 for details regarding the window contact and presence
detector.
Note:

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3.2.1 Influencing the operating mode
The operating mode can be influenced in different ways.
The source of the effective room operating mode state can be monitored using the
"Cause" diagnostic data point in theACS tool, bus operator unit RMZ792-B or web
server OZW772.
Source
Description
Value of DP "Cause"
Local operation
using operating
mode icon
·Operating mode is not Auto Timer
·No time scheduler using the bus Room operating mode selector
(preselection)
·Temporary Comfort extension is active (P68 >0) Timer function
·Window contact Window switch
·Presence detector Presence detector
Bus command
Room
operating mode
·
"Window state" sent using the bus Window switch
·"Presence detector" sent using the bus Presence detector
·Time scheduler available using the bus
àlocal operating mode is set toAuto Timer
·Time scheduler sends Protection mode using the
bus
àoperating mode cannot be changed locally
Time switch
The following table shows the priorities of different interventions.
A lower number means a higher priority.
Priority Description Remark
Commissioning In parameter setting mode (highest priority), you can command an operating
mode independent of all other settings or intervention using bus and local input.
Protection mode
using the bus from
time scheduler
Protection mode is, sent by a time scheduler
It cannot be overridden by the user, or by the window contact or presence
detector.
Window contact If the contact is closed (i.e. window open), the operating mode changes to
Protection. This overrides the operating mode on the thermostat.
"Window state"
using the bus "Window state" has the same effect as the local window contact.
Note: Only one input source must be used, either local input X1/X2 or KNX bus.
Presence detector If the contact is closed (room occupied), the operating mode changes to Comfort.
This overrides the operating mode on the thermostat. When the contact (room
unoccupied) is open, the thermostat is set back to Economy mode.
Presence detector
using bus "Presence detector" has the same effect as the local presence detector.
Operating mode
icon Touch the icon to select the operating mode using +/–.
Operating mode
using the bus The operating mode can be changed using the bus.
Temporarily
extended Comfort
mode using
operating mode
icon
Touch the icon to set operating mode from Economy to Comfort temporarily
if...– Economy was sent using bus
– Extended Comfort period > 0 (P68)
The last option selected is always used, either locally or using bus.
Time scheduler
using the bus The operating mode sent using the bus can be overridden by all other
interventions. Exception: Protection mode has priority 2.
Note: If the time scheduler switches from Comfort to Economy mode, but the
presence detector is still active (room occupied), the thermostat continues to
work in Comfort mode for the period of occupancy.
Source for change of
operating mode
ACS
Priority of operating
mode interventions

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If a time scheduler is available, e.g. from the central control unit, Auto Timer mode
is active. The thermostat automatically changes between Comfort and Economy
mode according to the time scheduler using the bus.
The display shows theAuto Timer mode icon .
Touch the operating mode icon to change to another operating mode.
When you are in the Auto Timer mode, and you change the operating mode, the
icon (manual override) displays in place of the icon, indicating that a schedule
being overridden.
Default fan speed in Auto Timer mode is automatic.
Each time the time scheduler sends a new operating mode (switching event), the
thermostat’s operating mode is set back toAuto Timer. This ensures that the room
temperature is maintained according to the time schedule.
If the time scheduler sends the Precomfort mode, it will be switched to Economy
(factory setting) or Comfort (selectable via P88).
If Protection mode is set by the time scheduler, no intervention is possible neither
by users, window contact or presence detector. The screen displays OFF.
You can still access the INFO page.
Touch the operating mode icon to select the operating mode using +/–.
The behavior of the operating mode icon (user profile) can be defined using P02,
factory setting is P02 = 1 (auto-protection).
P02 Without time
schedule
r
With time scheduler
using
bus
Description
1à à
Auto Timer mode =
Comfort
·Select Comfort or Protection mode when there is
no time schedule from the bus.
·Economy mode is not available
·If the time schedule from the bus is Protection
mode, the operating mode cannot be changed.
·Suited for hotel guest rooms and commercial
buildings.
2à à à à
If Auto Timer mode =
Comfort
à
If Auto Timer mode =
Economy
·Select Comfort, Economy or Protection mode
when there is no time schedule from the bus
·Economy mode is available
·If the time schedule from the bus is Protection
mode, the operating mode cannot be changed.
·If the time schedule from the bus is Comfort mode,
you can select Economy or Protection mode.
·If time schedule from bus is Economy and P68 is
greater than 0, Comfort mode can be temporarily
extended.
The thermostat can be forced into Protection mode when the window is opened.
The contact can be connected to a multifunctional input X1, X2. Set P38 or P40 to
3. User operations are ineffective and OFF is displayed if the window contact is
active.
Auto Timer mode
with time scheduler
using
the
bus
Note:
Behavior when bus
sends new operating
mode
Precomfort using the
bus
Behavior when bus
sends Protection
Note:
Availability of Economy
mode
Window
contact

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The “window contact” function is also available using the KNX signal "Window
state", e.g. from a KNX switch.
Only one input source can be used, either a local input X1/X2 or the KNX bus.
User operations are ineffective and OFF is displayed if the operating mode
“window contact” is active, or if "Window state" is sent using the bus.
The operating mode can be changed to Comfort and back to Economy depending
on the room occupancy (room occupied/unoccupied, using the presence detector
or the keycard).
Behavior without time scheduler:
·Whenever the presence detector is activated, the thermostat’s operating mode
of the thermostat changes to Comfort.
·Whenever the presence detector is deactivated, the operating mode changes
to Economy.
Behavior with time scheduler using bus:
·When the time switch is on Protection:
- Presence detector has no influence on the operating mode.
·When the time switch is on Economy:
- When the presence detector is activated, the operating mode changes to
Comfort.
- When the presence detector is deactivated, the operating mode goes to
(Auto) Economy.
·When the time switch is on Comfort:
- and the presence detector is activated or deactivated, Comfort mode is
maintained.
Important: When the time switch goes to Economy mode, and the presence
detector is still active, Comfort mode is maintained until the presence detector
becomes inactive, that is, back to (Auto) Economy mode
The contact (e.g. a card reader) can be connected to a multifunctional input X1/X2
(set P38 or P40 to 10) or the occupancy signal can be sent using the bus from a
KNX presence detector: Only one input source must be used, either a local input
X1/X2 or the KNX bus.
Comfort mode can be temporarily extended (e.g. working after business hours or
on weekends) when the thermostat is in Economy mode. The operating mode icon
switches the operating mode back to Comfort for the period preset via P68.
Touch the icon again to stop the timer.
The following conditions must be fulfilled:
·Time scheduler using the bus is Economy mode.
·P68 (extend Comfort period) is greater than 0.
During the temporary Comfort mode extension, the icon appears.
If P68 (extend Comfort period) = 0, extended Comfort cannot be activated. Touch
the icon to switch the thermostat to Protection.
If the window contact is active, touch the icon and OFF flashes on the LCD.
Room operating mode:
Window state
Note:
Presence detector
Note:
Temporary timer to
extend the Comfort
mode