Siemens RDU341 Operator's manual

s
Semi-flush mount room thermostats
with KNX communications
RDU341
Basic Documentation
Edition: 1.1
CE1P3172en
2015-06-08 Building Technologies

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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 Glossary................................................................................................6
2. Summary..............................................................................................7
2.1 Types ....................................................................................................7
2.2 Ordering................................................................................................7
2.3 Functions...............................................................................................7
2.4 Integration via KNX bus.........................................................................8
2.5 Equipment combinations......................................................................10
2.6 Accessories.........................................................................................11
3. Functions...........................................................................................12
3.1 Temperature control.............................................................................12
3.2 Operating modes.................................................................................13
3.2.1 Different ways to influence the operating mode....................................14
3.2.2 Communication examples....................................................................17
3.3 Room temperature setpoints................................................................19
3.3.1 Description..........................................................................................19
3.3.2 Setting and adjusting setpoints ............................................................20
3.4 Applications overview..........................................................................22
3.5 Additional functions..............................................................................23
3.6 Control sequences...............................................................................25
3.6.1 Sequences overview (setting via parameter P01).................................25
3.6.2 Application mode.................................................................................26
3.6.3 Minimum and maximum air volume......................................................28
3.6.4 Single-duct ..........................................................................................29
3.6.5 Single-duct with electric heater ............................................................30
3.6.6 Setpoints and sequences.....................................................................32
3.7 Control outputs....................................................................................33
3.7.1 Overview.............................................................................................33
3.7.2 Control outputs configuration (setting via DIP switches or tool).............33
3.8 Multifunctional input, digital input..........................................................34
3.9 Handling faults.....................................................................................36
3.10 KNX communications...........................................................................36
3.10.1 S-mode................................................................................................36
3.10.2 LTE mode............................................................................................36
3.10.3 Zone addressing in LTE mode (in conjunction with Synco)...................37
3.10.4 Example of heating and cooling demand zone.....................................39
3.10.5 Send heartbeat and receive timeout.....................................................40
3.10.6 Startup.................................................................................................40
3.10.7 Heating demand..................................................................................40

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3.10.8 Air demand..........................................................................................40
3.10.9 Electric heater interlock by supply air controller (LTE mode only).........41
3.10.10 Primary fan overrun after switching off the electric heater.....................41
3.10.11 Fault function on KNX..........................................................................42
3.10.12 Emergency control (LTE Mode only) ....................................................43
3.11 Communication objects (S-mode) ........................................................44
3.11.1 Overview.............................................................................................44
3.11.2 Description of communication objects..................................................45
3.12 Control parameters..............................................................................47
3.12.1 Parameter setting via local HMI............................................................47
3.12.2 Parameter setting / download via tool...................................................48
3.12.3 Parameters of the "Service level".........................................................49
3.12.4 Parameters of the "Expert level with diagnostics and test"...................50
4. Handling.............................................................................................52
4.1 Mounting and installation .....................................................................52
4.2 Commissioning....................................................................................53
4.3 Operation.............................................................................................55
4.4 Remote operation................................................................................56
4.5 Disposal ..............................................................................................56
5. Supported KNX tools.........................................................................57
5.1 ETS.....................................................................................................57
5.1.1 Parameter settings in ETS...................................................................57
5.2 ACS tool..............................................................................................57
5.2.1 Parameter settings in ACS...................................................................58
5.2.2 Operation and monitoring withACS......................................................59
5.2.3 Operation and monitoring with OZW772...............................................61
5.2.4 Operation and monitoring with RMZ972-B............................................61
6. Connection.........................................................................................62
6.1 Connection terminals...........................................................................62
6.2 Connection diagrams...........................................................................62
7. Mechanical design.............................................................................63
7.1 General ...............................................................................................63
7.2 Dimensions..........................................................................................64
8. Technical data....................................................................................65
Index …………………………………………………………………………………67

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1. About this document
1.1 Revision history
Edition Date Changes Section Pages
1.1 2015-06-08 Update the mounting notes, disposal notes,
declaration information and connection diagrams 4.1 4.5
6.2
8
52
56
62
65
1.0 16 Jul 2010 First edition all
1.2 Reference documents
Subject Ref Doc No. Description
Semi-flush mount room
thermostats with KNX
communications,
RDU341
[1] CE1N3172 Data Sheet
[2] CE1B3172 Operating Instructions
[3] CE1M3172 Mounting Instructions
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 RMB395 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
Apogee
engineering documents [18] 565-132 Installation Instructions: KNX driver for PXC Modular
[19] 127-1676 Technical Spec Sheet: KNX driver for PXC Modular
[20] 140-0804 Technical reference for KNX driver
[21] 140-0804 Application 6205 point map for RDU

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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 read the documents supplied
with or ordered at the same time as the products (equipment, applications, tools,
etc.) carefully and in full.
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:
·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 RDU KNX thermostats are familiar with
the ETS Professional and/or Synco ACS700 tools and able to use them.
It also presupposes that these users are aware of the specific conditions associ-
ated with KNX.
In most countries, specific KNX know-how is conveyed through training centers
certified by the KNX Association (see www.konnex.org/).
For reference documentation, see section 1.2.
1.5 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 using the ACS tool.
Setting RDU KNX parameters is only supported by the following tool
versions:
– ETS3f or higher
– ACS700 version 5.11 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 RDU KNX 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 3.12.
ETS
ACS
STOP Note!
KNXR

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2. Summary
2.1 Types
Product number Stock number Operating voltage Control outputs
Housing color
3 pos ON/OFF DC 0..10 V
RDU341 S55770-T106 AC 24 V -- ü ü white
2.2 Ordering
·When ordering, please indicate both product no. / stock no. and name:
E.g. RDU341 / S55770-T106 room thermostat
·Order valve actuators separately
2.3 Functions
VAV systems via ON/OFF or modulating control outputs:
·Single-duct system
·Single-duct system 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 HMI
·Operating modes: Comfort, Economy (Energy Saving) and Protection
·Outputs for DC 0…10 V actuator and AC 230V electric heater (ON-OFF)
·Automatic or manual heating / cooling changeover
·Backlit display
·AC 24 V operating voltage
·Room temperature control via built-in temperature sensor or external room
temperature / return air temperature sensor
·Changeover between heating and cooling mode (automatic via local sensor or
bus, or manually)
·Selection of applications via DIP switches or commissioning tool (ACS700)
·Select operating mode via operating mode button on the thermostat
·Temporary Comfort mode extension
·Display of current room temperature or setpoint in °C and/or °F
·Display of outdoor temperature or time of day via KNX bus
·Minimum and maximum limitation of room temperature setpoint
·Minimum and maximum limitation of air flow signal DC 0...10 V
·Button lock (automatically or manually)
·2 multifunctional inputs, freely selectable for:
– Operating mode switchover contact (keycard, window contact, etc.)
– Sensor for automatic heating / cooling changeover
– External room temperature or return air temperature sensor
Use
Features
Functions

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– Dew point sensor
– Electric heater enable
– Fault input
– Monitor input for temperature sensor or switch state
·Reload factory settings for commissioning and control parameters
2.4 Integration via KNX bus
The RDU room thermostats can be integrated as follows:
·Integration into Synco 700 system via LTE mode (easy engineering)
·Integration into Synco living via group addressing (ETS)
·Integration into DESIGO and Apogee via group addressing (ETS) or individual
addressing
·Integration into third-party systems via group addressing (ETS)
The following KNX functions are available:
·Central time program and setpoints, e.g. when using the RMB795 central control
unit
·Outside temperature or time of day via bus displayed on thermostat
·Remote operation and monitoring, e.g. using the RMZ792-B bus operator unit
·Remote operation and monitoring with web browser using the OZW772 or
OZW775 web server
·Maximum energy efficiency due to exchange of relevant energy information, e.g.
with Synco 700 controllers (e.g. heating demand, cooling demand)
·Alarming, e.g. external fault contact, condensation, etc.
·Monitoring input for temperature sensor or switch
Engineering and commissioning can be done using…
– local DIP switches / HMI
– Synco ACS700 service tool
– ETS
The RDU room thermostats are especially tailored for integration into 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 VAV.
Thanks to S-mode extension to the QAX910 central apartment unit, communicating
room thermostats can be easily integrated into Synco living systems. Using the
S-mode data points of the central apartment unit, additional room information can
be exchanged with the room thermostat via KNX TP1 (RF function is not available
on the room thermostats). To make the integration, the ETS engineering tool is
required.
Synco 700
Synco living

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Synco 700 Building automation and control system (BACS)
Synco living Room automation and control system
RDG..., RDF…, RDU… Room thermostats
OZW772 (or OZW775) Web server
RMZ792-B Bus operator unit
QAW... Room unit
ACS Engineering and Service tool
OCI700, OCI702 Interface for ACS
RXB, RXL Room controllers
QAX Room unit for RXB / RXL room controllers
The RDU KNX devices can be integrated into the Siemens building automation and
control systems (BACS) DESIGO / Apogee or into 3rd-party systems. For
integration, either S-mode (group addressing) or individual addressing can be
used. The workflow for integration into DESIGO / Apogee is the same as with
standard KNX devices.
Synco topology
Legend:
DESIGO, Apogee and
third-party systems

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2.5 Equipment combinations
Type of unit Product no. Data
sheet
Cable temperature sensor, cable
length 2.5 m
NTC (3 kWat 25 °C) QAH11.1 1840
Room temperature sensor
NTC (3 kWat 25 °C) QAA32 1747
Condensation detector / Supply unit QXA2000 /
QXA2001 /
AQX2000 1542
Electrical actuator, DC 0..10 V
(for radiator valve) SSA61... 4893
Electrical actuator, DC 0..10 V
(for 2 and 3 port valves / V…P45) SSC61… 4895
Electrical actuator, DC 0..10 V
(for small valve 2,5 mm) SSP61… 4864
Electrical actuator, DC 0..10 V
(for small valves 5.5 mm) SSB61... 4891
Electrical actuator, DC 0..10 V
(for Combi-valve VPI45) SSD61... 4861
Electromotoric actuator, DC 0..10V
(for valves 5.5 mm) SQS65… 4573
Thermal actuator, DC 0..10 V
(for small valves and radiator
valves) STS61 4880
DC 0…10 V damper actuator
GQD161… 4605
GDB161… 4634
GLB161…
GMA161… 4614
GEB161… 4621
GCA161… 4613
GBB161… 4626
GIB161…
VAV compact controller GDB181.1E/3 3544
GLB181.1E/3
DC 0…10 V
valve actuators
DC 0…10 V
damper actuators

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2.6 Accessories
Description Product no /
Stock no. Data sheet
Changeover mounting kit (50 pcs / package) ARG86.3 N3009
Plastic mounting bracket for RDU semi-flush-
mount thermostats for increasing the headroom in
the conduit box by 10 mm
ARG70.3 N3009
Conduit box for semi-flush mounted thermostat ARG71 /
S55770-T137 N3009
KNX power supply 160 mA (Siemens BT LV) 5WG1 125-1AB01 --
KNX power supply 320 mA (Siemens BT LV) 5WG1 125-1AB11 --
KNX power supply 640 mA (Siemens BT LV) 5WG1 125-1AB21 --

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3. Functions
3.1 Temperature control
Setting of the control parameters (P01, etc., mentioned throughout the document)
is described in section 3.12.
The thermostat acquires the room temperature via 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 heating
and/or cooling equipment. The following control outputs are available:
·VAV box / damper: Modulating PI/P control with DC 0...10 V
·El. heater: ON/OFF control (2-position)
The switching differential or proportional band is 2 K for heating mode and 1 K for
cooling mode (adjustable via parameters P30 and P31).
The integral action time for modulating PI control is 5 minutes (adjustable via
parameter P35).
The display shows the acquired room temperature or the Comfort setpoint, selecta-
ble via parameter P06. The factory setting displays the current room temperature.
Use parameter P04 to display the room temperature or setpoint in °F rather than
°C as needed.
The acquired room temperature (internal or external sensor) is also available as
information on the bus.
·With automatic changeover or continuous heating / cooling, symbols /
indicate that the system currently heats or cools (heating or cooling output is
activated).
·With manual changeover (P01 = 2), symbols / indicate that the system
currently operates in heating or cooling mode. Thus, the symbols are displayed
even when the thermostat operates in the neutral zone.
Concurrent display of the current temperature or setpoint in °C and °F (parameter
P07 = 1) is possible on the thermostats.
The outside temperature can be displayed on the room thermostat by setting
parameter P07 = 2. This temperature value has only information character.
In LTE mode, the outside temperature can only be received on outside temperature
zone 1.
In S-mode, the corresponding communication object needs to be bound with a
KNX sensor device.
Time of day via bus can be displayed on the room thermostat by setting parameter
P07 = 3 or 4. The display format is either in 12- or in 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.
General note:
Parameters
Temperature control
Display
KNXR
Room temperature
/
Concurrent display of
°C and °F
KNXR
Outside temperature via
bus
KNXR
Time of day via bus

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3.2 Operating modes
The thermostat's operating mode can be influenced in different ways (see below).
Specific heating and cooling setpoints are assigned to each operating mode.
The thermostat sends the effective room operating mode on the bus.
The following operating modes are available:
In Auto Timer mode the room operating mode is commanded via bus.
Auto Timer is replaced by Comfort when no time schedule via bus is present
In Comfort mode, the thermostat maintains the Comfort setpoint. This setpoint can
be defined via parameters P8, P9 and P10.
It can be locally adjusted via the +/- buttons or via bus.
In Comfort mode, the fan can be set to automatic or manual fan speed: Low,
medium or high.
The setpoints (less heating and cooling than in Comfort mode) can be defined via
parameters P11 and P12.
The thermostat switches to Economy mode when...
– the operating mode button is pressed (only possible if parameter P02 is set to 2)
– Economy is sent via bus
– an operating mode switchover contact (e.g. keycard contact presence detector,
window contact) is active.
The contact can be connected to multifunctional input X1, X2.
Set parameter P38 / P40 to 3 (P02 is irrelevant) *)
– "Window state" is sent via bus, e.g. from a KNX switch or a KNX presence
detector (P02 is irrelevant) *)
*) Operating mode switchover: Only one input source must be used, either local
input X1/X2 or KNX bus.
User operations are ineffective and “OFF” is displayed if the operating mode
switchover contact is active, or if "Window state" is sent via bus.
In Protectionmode, the system is...
– protected against frost (factory setting 8 °C, can be disabled or changed via
P65)
– protected against overheating (factory setting OFF, can be enabled or changed
via P66)
No other operating mode can be selected locally if Protection mode is commanded
via bus. and are displayed.
KNXR
Room operating mode:
State
Auto Timer
Comfort
Economy
KNXR
Room operating mode:
Window state
Note:
Protection

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3.2.1 Different ways to influence the operating mode
The operating mode can be influenced by different interventions.
The source of the effective room operating mode state can be monitored using the
"Cause" diagnostic data point in the ACS tool, operator unit RMZ792-B or web
server OZW772.
Source Description Value of DP "Cause"
Local operation
via operating
mode button
·Operating mode is not Auto Timer
·No time schedule via bus Room operating mode selector (preselection)
·Temporary Comfort extension is active “Timer” function
·Operating mode switchover contact Room operating mode contact
Bus command
KNXR
Room op. mode
·"Window state" sent via bus Room operating mode contact
·Time schedule available via bus
àlocal operating mode is set to Auto Timer
·Time schedule sends Protection mode via 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 always
command an operating mode independent of all other settings or
intervention via bus and local input.
Protection mode via bus
from time schedule Protection mode, sent by a time schedule, has priority 2. It cannot be overridden by the user nor by an operating mode
switchover contact.
Operating mode
switchover contact If the contact is closed, the operating mode changes to Economy. This overrides the operating mode on the thermostat.
"Window state" via bus "Window state" sent via bus has the same effect as the operating
mode switchover contact.
Note: Only one input source must be used, either local input
X1/X2 or KNX bus.
aOperating mode button The user can switch the operating mode using the operating
mode button.
bOperating mode via bus The operating mode can be changed via bus
cTemporary extended
Comfort mode via
operating mode button
The operating mode can be temporarily set from Economy to
Comfort by pressing the operating mode button, if...
– Economy was sent via bus
– extended Comfort period >0 (parameter P68)
The last intervention wins, either locally or via bus
Time schedule via bus The operating mode sent via bus can be overridden by all other
interventions. Exception: Protection mode has priority 2.
Source for change of
operating mode
ACS
Priority of operating
mode interventions

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If a time schedule via bus is present, e.g. from central control unit, then the Auto
Timer mode is active. The thermostat automatically changes between Comfort
and Economy according to the time schedule via bus.
The display shows the Auto Timer mode symbol along with the symbol for the
effective room operating mode (Comfort or Economy ).
By pressing the operating mode button, you can change to another operating
mode.
Automatic fan is the default fan speed in Auto Timer mode.
Each time the time schedule sends a new operating mode (switching event), the
operating mode of the thermostat is set back to Auto Timer mode. This is to assure
that the room temperature is maintained according to the time schedule.
If the time schedule sends Precomfort mode, then this mode will be transformed
either into Economy (factory setting) or Comfort (selectable via parameter P88).
No intervention is possible neither by the user nor by an operating mode switch-
over contact, if Protection mode is set by the time schedule. OFF flashes on the
display when the user presses a button.
The operating mode can be selected locally via the operating mode button.
The behavior of the operating mode button (user profile) can be defined via
parameter P02, factory setting is P02 = 1.
P02 Without time
schedule With time sche- dule via bus Description
1àà·Switching manually between 2modes, Economy is not
available (factory setting)
·Suited for hotel guest rooms or commercial buildings.
·If a time schedule via bus is available, then the Comfort
mode can be temporarily extended (see below)
2à à à à à ·Switching manually between 3modes
·Suited for homes and rooms where manual switching to
Economy mode is desired
The thermostat can be forced into Economy mode (e.g. when a window is opened,
when a presence detector signals "no one present", when the keycard of a hotel
room is withdrawn, etc). The contact can be connected to multifunctional input X1,
X2. Set parameter P38, P40 to 3.
If the operating mode switchover contact is active, pressing the operating mode
button will show “OFF” (blinking).
The function is also available via the KNX signal "Window state", e.g. from a KNX
switch or a KNX presence detector.
Note: Only one input source must be used, either local input X1/X2or KNX bus.
User operations are ineffective and “OFF” is displayed if the operating mode
switchover contact is active, or if "Window state" is sent via bus.
Auto Timer mode
with time schedule via
bus
Behavior when bus
sends new operating
mode
Precomfort via bus
Behavior when bus
sends Protection
Availability of Economy
mode
Operating mode
switchover contact
(window contact)
KNXR
Room operating mode:
Window state

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Comfort mode can be temporarily extended (e.g. working after business hour or on
weekends) when the thermostat is commanded to Economy mode.
The operating mode button switches the operating mode back to Comfort for the
period preset in P68.
Press the operating mode button again to stop the timer.
The following conditions must be fulfilled:
·Mode selection via operating mode button is set to “Protection-Auto” (P02 = 1)
and parameter P68 (extend Comfort period) is greater than 0
·The time schedule via bus is Economy or Operating mode switchover is active
During the temporary Comfort mode extension, symbol appears.
If parameter P68 (extend Comfort period) = 0, extended Comfort cannot be
activated; pressing the operating mode button will switch the thermostat to
Protection.
Temporary timer to
extend the Comfort
mode

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3.2.2 Communication examples
The following examples show two typical applications of a central time schedule in
conjunction with local control of the room operating mode.
The room operating mode in rooms 1…2 of a building is determined by the time
schedule.Window contacts are fitted in all rooms.
The following conditions are specified:
The rooms are used and controlled by the time schedule as follows:
– Night setback from 17:00 to 08:00 (Economy)
– Protection from 20:00 to 06:00
– Lunch break from 12:00 to 13:00 (Precomfort)
The substitution (parameter P88) for Precomfort via bus is set on the thermostats
as follows:
– Room 1: Comfort (1)
– Room 2: Economy (0)
Operating mode switchover
In room 1, the window is opened briefly, once in the morning, once in late
afternoon and once at night (1). Only the opening in the morning has a direct
impact on the effective room operating mode.
During lunch break, the time schedule changes to Precomfort. The mode remains
in Comfort as set by parameter “Transformation Precomfort” (P88 = 1).
Time schedule
Window contact
Room 1
Effective room
operating mode
Room 1
Comfort
Precomfort
Economy
Protection
Window open
Window closed
Comfort
Economy
Protection
08:00 17:0013:0012:00
1)
06:00 20:00
1) 1)
2)
3171Z91
Example 1

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Interaction of user operation (operating mode button) and central time
schedule
In room 2, the window is opened briefly, once in the morning and once at night (1).
Only the opening in the morning has a direct impact on the effective room opera-
ting mode.
With the operating mode button, the operating mode can be changed between
OFF and Auto or temporary Comfort extension respectively.
·During lunch break, the time schedule changes to Precomfort.
The mode of the thermostat changes to Economy as set by parameter
“Transformation Precomfort” (P88 = 0) (6)
·During lunch break, the user changes the operating mode to Comfort
(temporary Comfort extension) by pressing the operating mode button (2).
At 13:00, the timer is reset due to mode change of the central time schedule
·In the afternoon, the user switches the thermostat off by pressing the operating
mode button (3). At 17:00 the user setting is reset to Economy by the time
schedule
·At 19:30, the user again extends the Comfort mode (4). At 20:00, the timer is
reset by the time schedule
·After 20:00, pressing the operating mode button has no effect, as the central
time switch sets the thermostat to Protection (5)
Time schedule
Room operating
mode
Operating mode
button on the
thermostat
Window contact
Room 2
Effective room
operating mode
Room 2
Comfort
Precomfort
Economy
Protection
Pressed
Window open
Window closed
Comfort
Economy
Protection
08:00 17:0013:0012:00 06:00 20:00
1) 1)
5)
2) 3) 4)
6)
3171Z92
Example 2

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3.3 Room temperature setpoints
3.3.1 Description
The factory setting for the Comfort basic setpoint is 21 °C and can be changed in
the thermostat’s EEPROM via parameter P08 or via bus with communication object
" Comfort basic setpoint". The last intervention always wins.
The Comfort setpoint can be adjusted via +/- buttons, or via bus from a remote
device like a touchpanel, operating unit, etc.
The last intervention always wins.
If the “Temporary setpoint” function is enabled via parameter P69, the Comfort
setpoint adjusted via the +/- buttons or via bus is set back to the Comfort basic
setpoint stored in P08 when the operating mode changes.
For energy saving purposes, the setpoint setting range can be limited to minimum
(P09) and maximum (P10).
·If the minimum limit P09 is set lower than the maximum limit P10, both heating
and cooling are adjustable between these 2 limits
·For heating or cooling applications (e.g. single duct):
– The setting range in cooling mode is from P09…40 °C in place of 5…40 °C
– The setting range in heating mode is from 5…P10 °C in place of 5…40 °C
·For heating and cooling applications (e.g. single duct with el. heater):
–P09 is the setpoint for cooling and P10 the setpoint for heating
– The setpoint can no longer be adjusted via the rotary knob
Examples Single duct
Heating OR cooling Single duct & el. heater Heating AND cooling
P09 < P10
Cooling setpoint adjustable 18…25 °C
Heating setpoint adjustable 18…25 °C Cooling setpoint adjustable 18…25 °C Heating setpoint adjustable 18…25 °C
P09 ≥P10
Cooling setpoint adjustable 25…40 °C
Heating setpoint adjustable 5…21 °C
Cooling fixed = 25 °C (P09)
Heating fixed = 21 °C (P10)
Use control parameters P11 and P12 to adjust the Economy mode setpoints.
The heating setpoint is factory-set to 15 °C, and the cooling setpoint to 30 °C.
Use control parameters P65 and P66 to adjust the Protection mode setpoints.
The heating setpoint is factory-set to 8 °C (frost protection) and to OFF for cooling.
Comfort mode
Temporary setpoint
Setpoint limitation
P09 < P10
P09 ≥P10
Economy mode
Protection mode

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If a setpoint (Economy or Protection) is set to OFF, the thermostat does not control
the room temperature in the corresponding mode (heating or cooling).
This means no protective heating or cooling function and thus risk of frost in
heating mode or risk of overtemperature in cooling mode!
The Economy setpoints are accessible at the service level (P11, P12); the
Protection setpoints at the expert level (P65, P66).
3.3.2 Setting and adjusting setpoints
Room temperature setpoints can be
– set during commissioning
– adjusted during runtime
The source can be
– the local HMI
– a tool
– a central control unit
The thermostat stores the setpoints
– in EEPROM in the form of parameters
– in the runtime memory
The table below shows the interrelations:
Setpoint setting
Sto
red in EEPROM
of thermostat
Commis
sioning
– HMI
– Tool download
Input LTE mode
Input S
-
m
ode
Comfort basic setpoint
Dead zone Comfort 1) Setpoints Heating
Setpoints Cooling Comfort basic setpoint P08 Comfort basic setpoint P33 Dead zone Comfort 1)
Setpoint Economy Heating
Setpoint Economy Cooling Setpoints Heating
Setpoints Cooling P11 Economy Heating P12 Economy Cooling
Setpoint Protection Heating
Setpoint Protection Cooling P65 Protection Heating P66 Protection Cooling
Current
runtime
setpoints in
thermostat
Setpoint
adjustment
New
current
runtime setpoints
in thermostat
Input LTE mode
2)
Input S
-
m
ode
3)
Local ope
-
ration 3)
Comfort setpoint Setpoint shift H
Setpoint shift C Comfort setpoint + / - buttons Comfort setpoint
Economy Heating
Economy Cooling Setpoint shift H Setpoint shift C Economy Heating Economy Cooling
Protection Heating
Protection Cooling Protection Heating Protection Cooling
Effective room operating mode Current setpoint (used by the thermostat for temperature control)
Caution
KNXR
Comfort basic setpoint
Comfort setpoint