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RDF301, RDF600KN RDF301.50
Semi-flush mount room thermostats
with KNX communications
RDF301, RDF301.50, RDF600KN
Basic Documentation
Edition: 2.0
CE1P3171en
2012-10-04
Building Technologies
2 / 82
Siemens RDF301, RDF301.50, RDF600KN Basic documentation CE1P3171en
Building Technologies Contents 2012-10-04
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 ............................................................................9
2.5 Equipment combinations.........................................................................11
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 ...............................................................21
3.4 Applications overview..............................................................................23
3.5 Additional functions .................................................................................25
3.6 Control sequences ..................................................................................28
3.6.1 Sequences overview (setting via parameter P01) ..................................28
3.6.2 Application mode.....................................................................................29
3.6.3 2-pipe fan coil unit ...................................................................................31
3.6.4 2-pipe fan coil unit with electric heater....................................................32
3.6.5 4-pipe fan coil unit ...................................................................................34
3.6.6 Chilled / heated ceiling and radiator applications ...................................36
3.6.7 Compressor applications.........................................................................36
3.6.8 Setpoints and sequences........................................................................37
3.7 Control outputs........................................................................................39
3.7.1 Overview .................................................................................................39
3.7.2 Control outputs configuration (setting via DIP switches or tool) .............40
3.8 Fan control ..............................................................................................41
3.9 Multifunctional input, digital input ............................................................44
3.10 Handling faults.........................................................................................45
3.11 KNX communications..............................................................................46
3.11.1 S-mode....................................................................................................46
3.11.2 LTE mode ................................................................................................46
3.11.3 Zone addressing in LTE mode (in conjunction with Synco) ....................47
3.11.4 Example of heating and cooling demand zone.......................................49
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3.11.5 Send heartbeat and receive timeout.......................................................50
3.11.6 Startup.....................................................................................................50
3.11.7 Heating and cooling demand ..................................................................50
3.11.8 Fault function on KNX .............................................................................51
3.11.9 KNX switching groups (RDF301.50 only) ...............................................52
3.12 Communication objects (S-mode)...........................................................54
3.12.1 Overview .................................................................................................54
3.12.2 Description of communication objects ....................................................55
3.13 Control parameters .................................................................................58
3.13.1 Parameter setting via local HMI ..............................................................58
3.13.2 Parameter setting / download via tool.....................................................59
3.13.3 Parameters of the "Service level" ...........................................................60
3.13.4 Parameters of the "Expert level with diagnostics and test"....................61
4. Handling.................................................................................................63
4.1 Mounting and installation ........................................................................63
4.2 Commissioning........................................................................................64
4.3 Operation ................................................................................................66
4.4 Remote operation....................................................................................67
4.5 Disposal ..................................................................................................67
5. Supported KNX tools............................................................................68
5.1 ETS .........................................................................................................68
5.1.1 Parameter settings in ETS ......................................................................68
5.2 ACS Service and Operating tool.............................................................69
5.2.1 Parameter settings in ACS......................................................................70
5.2.2 Operation and monitoring with ACS........................................................71
5.2.3 Operation and monitoring with OZW772 ................................................74
5.2.4 Operation and monitoring with RMZ972 .................................................74
6. Connection ............................................................................................75
6.1 Connection terminals ..............................................................................75
6.2 Connection diagrams ..............................................................................76
7. Mechanical design ................................................................................77
7.1 General ...................................................................................................77
7.2 Dimensions .............................................................................................78
8. Technical data .......................................................................................79
Index ................................................................................................................81
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Building Technologies About this document 2012-10-04
1. About this document
1.1 Revision history
Edition Date Changes Section Pages
2.0 Oct 2012 Added RDF600… All All
1.0 22 Jun 2010 First edition
1.2 Reference documents
Subject Ref Doc No. Description
[1] CE1N3171 Data Sheet
[2] CE1B3171... Operating Instructions
Semi-flush mount room
thermostats with KNX
communications,
RDF301, RDF301.50,
RDF600KN
[3]
[3a]
CE1M3171
CE1M3076.1
Mounting Instructions RDF301...
Mounting Instructions RDF600KN
KNX Manual [4] Handbook for Home and Building Control – Basic Principles
(www.knx.org/uk/news-press/p
ublications/publications/)
[5] CE1N3127 KNX bus, Data Sheet
[6] CE1P3127 Communication via the KNX bus for Synco 700, 900 and
RXB/RXL, Basic Documentation
Synco and KNX (see
www.siemens.com/synco
)
[7] XLS template
in HIT
Planning and commissioning protocol,
communication Synco 700
[8] CE1N3121 RMB795 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
[13] CM1Y9775 Desigo RXB integration – S-mode
[14] CM1Y9776 Desigo RXB / RXL integration – Individual Addressing
[15] CM1Y9777 Third-party integration
[16] CM1Y9778 Synco integration
Desigo
engineering documents
[17] CM1Y9779 Working with ETS
[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
Apogee
engineering documents
(RDF301... only)
[21] 140-0804 Application 6205 point map for RDF
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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 is 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 fieldsupport-zug.ch.sbt@siemens.com
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 RDF KNX thermostats are familiar with
the ETS and/or Synco ACS 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 RDF KNX parameters is only supported by the following tool
versions:
– ETS3f or higher
– ACS 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 RDF 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 3.13.
ETS
ACS
STOP
Note!
KNX
R
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2. Summary
2.1 Types
Product no. Stock no.
Operating
voltage
Control outputs
3-pos ON/OFF DC 0..10 V
KNX switching
groups
Suitable
conduit
box
2)
RDF301 S55770-T104 AC 230 V
1
1)
2
1)
--
rectangular
RDF301.50 S55770-T105 AC 230 V
1
1)
2
1)
--
rectangular
RDF600KN S55770-T293 AC 230 V
1
1)
2
1)
--
round
1) Selectable: ON/OFF or 3-position
2) Rectangular conduit box e.g. ARG71.
Round CEE conduit box min 60 mm diameter and min 40 mm depth
2.2 Ordering
When ordering, please indicate both product no. / stock no. and name:
E.g. RDF301 / S55770-T104 room thermostat
Order valve actuators separately
2.3 Functions
Fan coil units via ON/OFF or modulating control outputs:
2-pipe system
2-pipe system with electric heater
4-pipe system
Chilled / heated ceilings (or radiators) via ON/OFF or modulating control
outputs:
Chilled / heated ceiling
Chilled / heated ceiling with electric heater
Chilled / heated ceiling and radiator / floor heating
Compressors: Via ON/OFF control
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 HMI
Use
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Operating modes: Comfort, Economy (Energy Saving) and Protection
ON/OFF or 3-position control outputs (relay)
Output for 3-speed or 1-speed fan
Automatic or manual heating / cooling changeover
Backlit display
AC 230 V operating voltage
RDF600KN for round CEE box, with min 60 mm diameter, min 40 mm depth
RDF301… for recessed rectangular box with 60.3 mm fixing centers
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 (ACS).
Select operating mode via operating mode button on the thermostat
Temporary Comfort mode extension
1- or 3-speed fan control (automatically or manually)
Display of current room temperature or setpoint in °C and/or °F
Minimum and maximum limitation of room temperature setpoint
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
– Dew point sensor
– Electric heater enable
– Fault input
– Monitor input for temperature sensor or switch state
Advanced fan control function, e.g. fan kick, fan start, selectable fan operation
(enable, disable or depending on heating or cooling mode)
“Purge” function together with 2-port valve in a 2-pipe changeover system
Reminder to clean fan filters (adjust with P62)
Floor heating temperature limitation
Reload factory settings for commissioning and control parameters
Features
Type of mounting /
suitable conduit boxes
Functions
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2.4 Integration via KNX bus
The RDF 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 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)
RDF301.50 only: 4 buttons to control KNX actuators via KNX S-mode
("switching groups" with functions such as switching, dimming, blinds control,
8-bit scene)
Alarming, e.g. external fault contact, condensation, clean filter, etc.
Monitoring input for temperature sensor or switch
Engineering and commissioning can be done using…
– local DIP switches / HMI
– Synco ACS service tool
– ETS
The RDF 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 fan coil units, VAV, chilled
ceilings and radiators.
Thanks to S-mode extension to the QAX9x3 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 Bus operator unit
QAW... Room unit
ACS Service tool using OCI700.1 (OCI700.1 is delivered
with a service cable which can be plugged into the
service connector on a Synco controller)
RXB, RXL Room controllers
QAX Room unit for RXB / RXL room controllers
The RDF 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.
Synco topology
Legend:
Desigo, Apogee and
third-party systems
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2.5 Equipment combinations
Description Product no.
Data
sheet
Cable temperature sensor
QAH11.1
1840
Room temperature sensor
QAA32
1747
Condensation detector / extension
module
QXA2000 /
QXA2001 /
AQX2000
1542
Electromotoric ON/OFF actuator
SFA21...
4863
Electromotoric ON/OFF valve and
actuator
(only available in AP, UAE, SA and IN)
MVI… / MXI…
4867
Zone valve actuator
(only available in AP, UAE, SA and IN)
SUA…
4832
Thermal actuator (for radiator valves)
STA23...
STA21... *)
4884
4893 *)
Thermal actuator
(for small valves 2.5 mm)
STP23...
STP21... *)
4884
4893 *)
Electrical actuator, 3-position
(for radiator valves)
SSA31...
4893
Electrical actuator, 3-position
(for small valves 2.5 mm)
SSP31…
4864
Electrical actuator, 3-position
(for small valves 5.5 mm)
SSB31...
4891
Electrical actuator, 3-position
(for small valve 5.5 mm)
SSD31...
4861
Electromotoric actuator, 3-position
(for valves 5.5 mm)
SQS35…
4573
*) Not available any more
2.6 Accessories
Description Product no / SSN
Data
sheet
Changeover mounting kit
(50 pcs/package)
ARG86.3
N3009
Plastic mounting bracket for semi-
flush-mount thermostats RDF301... for
increasing the headroom in the conduit
box by 10mm
ARG70.3
N3009
Conduit box for semi-flush mounted
thermostat RDF301...
ARG71 /
S55770-T137
N3009
KNX Power supply 160 mA (Siemens BT LV)
5WG1 125-1AB02
--
KNX Power supply 320 mA (Siemens BT LV)
5WG1 125-1AB12
--
KNX Power supply 640 mA (Siemens BT LV)
5WG1 125-1AB22
--
On / off actuators
3-position actuators
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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 3.13.
The thermost
at 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:
ON/OFF control (2-position)
Modulating PI/P control with 3-position control output (only for 2-pipe
applications)
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 (RDF301...) and 45
minutes (RDF600KN), 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 change the room temperature display from °C to °F 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 31.
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.
When an application program is downloaded to the Synco devices via ETS, the
correct group addresses need to be downloaded as well to display the time of day
on the room thermostat. (see Synco Knowledge Base - KB771)
General note:
Parameters
Temperature control
Display
KNX
R
Room temperature
/
Concurrent display of
°C and °F
KNX
R
Outside temperature via
bus
KNX
R
Time of day via bus
Note
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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/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.
In Protection mode, 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.
KNX
R
Room operating mode:
State
Auto Timer
Comfort
Economy
KNX
R
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 or web server
OZW772 / 775.
Source Description Value of DP "Cause"
Operating mode is not Auto Timer
No time schedule via bus
Room operating mode selector
(preselection)
Temporary Comfort extension is active
“Timer” function
Local operation
via operating
mode button
Operating mode switchover contact
Room operating mode contact
"Window state" sent via bus
Room operating mode contact
Bus command
KNX
R
Room op. mode
Time schedule available via bus
local operating mode is set to Auto Timer
Time schedule sends Protection mode via bus
operating 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.
Operating mode button The user can switch the operating mode using the operating
mode button.
Operating mode via bus The operating mode can be changed via bus
Temporary 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
1
Switching manually between 2 modes, 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)
2
Switching manually between 3 modes
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.
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/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.
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)
KNX
R
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 in 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 the time schedule via bus is Economy
Parameter P68 (extend Comfort period) is greater than 0
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.
If the operating mode switchover contact is active, pressing the operating mode
button will show “OFF” (blinking).
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).
Ti
me 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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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.
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).
Economy mode
Protection mode
Caution
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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 Stored in EEPROM
of thermostat
Commissioning
– HMI
– Tool download
Input LTE mode Input S-mode
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-mode
3)
Local ope-
ration
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)
1) Only required for heating AND cooling applications (see section 3.6.8)
2) L
TE mode: the shift is added to the local shift
3) S-Mode: the last intervention wins, either S-Mode input or local operation
The current setpoint (used by the thermostat for temperature control) is available
on the bus for use in the central control unit.
KNX
R
Comfort basic setpoint
Comfort setpoint
KNX
R
Current setpoint
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The supported communication objects are different in LTE mode and S-mode
Changes via the local HMI or via tool have the same priority (last always wins)
Setting the Comfort basic setpoint will reset the runtime Comfort setpoint to the
basic setpoint
Central setpoint shift is used for summer / winter compensation in particular
Setpoint shift does not affect the setpoints stored in parameters P08, P11, P12,
P33
Local shift and central shift are added together
Applies only to Comfort and Economy setpoints; Protection setpoints are not
shifted centrally
The resulting (current) setpoint heating and cooling is limited by the Protection
setpoint; if Protection setpoint is OFF, then minimum 5 °C and maximum 40 °C
are used
The resulting setpoints for cooling and heating of the same operating mode have
a minimum distance of 0.5 K between them
The result of local and central shift, together with the room operating mode, is
used by the thermostat for temperature control (current setpoint)
General notes:
Notes on setpoint
adjustment (LTE mode
with Synco only)
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3.4 Applications overview
The thermostats support the following applications, which can be configured using
the DIP switches inside the front panel of the unit or a commissioning tool.
All DIP switches need to be set to OFF (remote configuration, factory setting) to
select an application via commissioning tool.
The tool offers the applications printed in bold text (basic applications).
For universal applications (chilled ceiling, etc.), refer to section 3.6.6.
For comp
ressor applications, refer to subection 3.6.7.
Application and output signal DIP switches Diagram
Remote configuration
via commissioning tool (factory setting)
Synco ACS
ETS
1
ON
23
Heating or cooling
2-pipe fan coil unit ON/OFF
(heating or cooling)
Chilled / heated ceiling ON/OFF
(heating or cooling)
1-stage compressor ON/OFF
(heating or cooling)
1
ON
23
2-pipe fan coil unit 3-position
(heating or cooling)
Chilled / heated ceiling 3-position
(heating or cooling)
1
ON
23
3076D20
(B1)
M1
Y1
T
B2
T
T
(B1)
Heating or cooling with electric heater
2-pipe fan coil unit with electric heater
(heating or cooling) ON/OFF
Chilled / heated ceiling with electric heater,
(heating or cooling) ON/OFF
1-stage compressor with electric heater,
(heating or cooling) ON/OFF
1
ON
23
Y1
M1
3171D21
T
B2
YE
T
(B1)
T
(B1)
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Application and output signal DIP switches Diagram
Heating and cooling
4-pipe fan coil unit
(heating and cooling) ON/OFF
Chilled ceiling and radiator
(heating and cooling) ON/OFF
1-stage compressor
(heating and cooling) ON/OFF
1
ON
23
T
Y2
Y1
M1
3076D22
(B1)
T
(B1)
Key Y1 Heating or heating / cooling
valve actuator
M1 3- or 1-speed fan
Y2 Cooling valve actuator B1 Return air temperature sensor or external
room temperature sensor (optional)
YE Electric heater B2 Changeover sensor (optional)
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3.5 Additional functions
The heating / cooling changeover information can be received via bus. This is only
possible if the control sequence is set to automatic heating / cooling changeover
(parameter P01 = 3) and no local input X1, X2 is assigned with this function.
In the absence of the required information (e.g. due to problems with data
communication, power failure, etc.), the thermostat operates in the last valid room
operating mode (heating or cooling).
If a cable temperature sensor (QAH11.1 + ARG86.3) is connected to X1 / X2, and
parameter P38 / P40 is =2, the water temperature acquired by the changeover
sensor is used to change over from heating to cooling mode, or vice versa. When
the water temperature is above 28 °C (parameter P37), the thermostat changes
over to heating mode, and to cooling mode when below 16 °C (parameter P36).
If the water temperature is between the 2 changeover points immediately after
power-up, the thermostat starts in the previously active mode.
The water temperature is acquired at 30-second intervals and the operating state is
updated accordingly.
16
M
T
w
[°C]
28
M Operating mode
Cooling mode
T
w
Water temperature
Heating mode
The QAH11.1 cable temperature sensor for automatic heating / cooling changeover
can be replaced by an external switch for manual, remote changeover:
3076Z03
X2
M
T
X2
M
QAH11.1
T °C
Contact open heating mode
Contact closed cooling mode
The sensor or switch can be connected to input terminal X2 or X1, depending on
the commissioning of the inputs (P38, P40).
See also section 3.9 “Multifunctional input”.
If manual hea
ting / cooling changeover is commissioned (P01 = 2), then heating /
cooling mode cannot be changed via bus / changover sensor / switch; it will remain
in the last mode as selected locally via button.
The thermostat acquires the room temperature via built-in sensor, external room
temperature sensor (QAA32), or external return air temperature sensor (QAH11.1)
connected to multifunctional input X1 or X2.
Inputs X1 or X2 must be commissioned accordingly. See section 3.9 “Multi-
func
tional input”.
Heating / cooling
changeover via bus
KNX
R
Heating/cooling
changeover
Automatic heating /
cooling changeover via
changeover sensor
Changeover switch
Manual heating /
cooling changeover
External / return air
temperature sensor
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The changeover sensor ensures changeover from heating to cooling mode based
on the acquired water temperature. We recommend activating the “Purge” function
(parameter P50) with 2-port valves. This function ensures correct acquisition of the
medium temperature even if the 2-port valve is closed for an extended period of
time. The valve is then opened for 1 to 5 minutes (adjustable) at 2-hour intervals
during off hours.
The “Purge” function (parameter P50) must be disabled if the thermostat is used in
compressor-based applications.
In very warm and humid climates, the fan can be run periodically or continuously at
a low fan speed (e.g. in empty apartments or shops) in Economy mode by setting
parameter P61, in order to avoid damage from moisture due to lack of air
circulation. See also section 3.8 “Fan control”, under “Fan kick function”.
Limit the ON/
OFF switching cycle to protect the HVAC equipment, e.g. compressor
and reduce wear and tear. The minimum output on-time and off-time for 2-position
control output can be adjusted from 1 to 20 minutes via parameters P48 and P49.
The factory setting is 1 minute.
Readjusting the setpoint or heating / cooling mode changeover immediately results
in calculation of the output state; the outputs may not hold the minimum 1-minute
ON/OFF time.
If parameter P48 or P49 is set to above 1 minute, the minimum ON/OFF time for
the control output is maintained as set, even if the setpoint or changeover mode is
readjusted.
All heating sequences can also be used for floor heating.
You can use fan coil unit heating / cooling sequences for floor heating or cooling by
disabling the fan via parameter P52.
The floor temperature should be limited for 2 reasons: Comfort and protection of
the floor.
The floor temperature sensor, connected to multifunctional input X1 or X2, acquires
the floor temperature. If the temperature exceeds the parameterized limit (parame-
ter P51), the heating valve is fully closed until the floor temperature drops to a level
2 K below the parameterized limit.
This function is factory-set to OFF (disabled).
Input X1 or X2 must be commissioned accordingly (P38 or P40 = 1).
See section 3.9 “Multifunctional input”.
Living roo
ms:
Up to 26 °C for long-time presence, up to 28 °C for short-time presence.
Bath rooms:
Up to 28 °C for long-time presence, up to 30 °C for short-time presence.
The table below shows the relation between parameter, temperature source and
temperature display:
Parameter P51
External temp.
sensor available
Source for display of
room temperature
Output control
according to
Floor temp.
limit function
OFF No Built-in sensor Built-in sensor Not active
OFF Yes External temp. sensor External temp. sensor Not active
10...50 ˚C No Built-in sensor Built-in sensor Not active
10…50 ˚C Yes Built-in sensor
Built-in sensor + limit
by external sensor
Active
Purge function
Caution
Avoid damage from
moisture
Minimum output
ON-time / OFF-time
Floor heating /
Floor cooling
Floor temperature
limitation function
Recommended values
for P51:
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The “Floor temperature limitation” function influences the outputs listed in the table
below:
“Floor temp. limit” function has impact on
Application Output Y11 Output Y21
Heating
(P01 = 0/2/3)
Cooling
(P01 = 1/2/3)
Heat. and cool
.
(P01 = 4)
Remark
2-pipe H/C valve Y11 N/A
2-pipe & el heater H/C valve El heater Y21 Y21 *) Only el heater
4-pipe Heating valve Cooling valve Y11 N/A Y11
*) If P13 = ON
electric heater in cooling mode
Either floor temperature sensor or external room temperature sensor can be used.
Dew point monitoring is essential to prevent condensation on the chilled ceiling
(cooling with fan disabled, parameter P52). It helps avoid associated damage to
the building.
A dew point sensor with a potential-free contact is connected to multifunctional
input X1 or X2. If there is condensation, the cooling valve is fully closed until no
more condensation is detected, and the cooling output is disabled temporarily.
The condensation symbol “
” is displayed during temporary override and the fault
“Condensation in room” will be sent via bus.
The input must be commissioned accordingly (P38, P40).
See section 3.9 “Multifunctional input”.
If the “Button
lock” function is enabled by parameter P14, the buttons will be locked
or unlocked by pressing the operating mode button for 3 seconds.
If “Auto lock” is configured, the thermostat will automatically lock the buttons 10 /
20 seconds after the last adjustment (RDF301... / RDF600KN).
Note
Dew point monitoring
KNX
R
Fault state
Fault information
Button lock
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3.6 Control sequences
3.6.1 Sequences overview (setting via parameter P01)
The main control sequence (i.e. the water coil sequence of the fan coil unit) can be
set via parameter P01.
The following sequences can be activated in the thermostats (each without or with
auxiliary heating).
The available sequences depend on the application (selected via DIP switch, see
section 3.4).
Parameter
P01 = 0 P01 = 1 P01 = 2 P01 = 3 P01 = 4
Sequence
T °C
T °C
T °C
T
T °C
Available
for basic
application
1)
:
Heating
Cooling
*) 2-pipe with
el. heater
Manually select
heating or
cooling
sequence
Automatic
heating /
cooling
changeover via
external water
temperature
sensor or
remote switch
Heating and
cooling
sequence, i.e.
4-pipe
2-pipe,
2-pipe & el heater
4-pipe
2)
2)
1) For chilled / heated ceiling and radiator applications, see section 3.6.6;
for com
pressor applications, see section 3.6.7
2)
For manual and automatic changeover with 4-pipe applications, see section
3.6.5:
– 4-pip
e manual changeover (P01 = 2) means activating either cooling or
heating outputs
– 4-pipe automatic changeover (P01 = 3) means swapping the control outputs
according to a heating / cooling sensor or remote switch ("main and
secondary" application), see section 3.6.5
For the relation between
setpoints and sequences, see section 3.6.8.
Note
s:
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3.6.2 Application mode
The behavior of the thermostat can be influenced by a building automation and
control system (BACS) via bus with the command “Application mode”.
With this signal, cooling and/or heating activity can be enabled or disabled.
Application mode is supported in LTE mode and S-mode.
The RDF KNX thermostats support the following commands:
# Application
mode
Description Control sequence
enabled
0 Auto Thermostat automatically changes between
heating and cooling
Heating and/or cooling
1 Heat Thermostat is only allowed to heat Heating only
2 Morning
warm-up
If “Morning warm-up” is received, the room
should be heated up as fast as possible (if
necessary). The thermostat will only allow
heating
Heating only
3 Cool Thermostat is only allowed to provide cooling Cooling only
4 Night purge Not supported by fan coil applications N/A (= Auto)
5 Pre-cool If “Pre-cool” is received, the room should be
cooled down as fast as possible (if
necessary). The thermostat will only allow
cooling
Cooling only
6 Off Thermostat is not controlling the outputs,
which means all outputs go to off or 0%
Neither heating nor
cooling
8 Emergency
heat
The thermostat should heat as much as
possible. The thermostat will only allow
heating
Heating only
9 Fan only All control outputs are set to 0% and only the
fan is set to high speed.
Function will be terminated by any operation
on the thermostat
Run fan in high speed
With all other commands, the thermostat behaves like in Auto mode, i.e. heating or
cooling according to demand.
KNX
R
Application mode
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The state (heating or cooling) of the thermostat can be monitored with the ACS tool
(diagnostic value “Control sequence”). The last active mode is displayed when the
thermostat is in the dead zone or temperature control is disabled.
With a 2 pipe application, the control sequence state is determined by the
application mode (see section 3.6.2) and by the state of the heating / cooling
cha
ngeover signal (via local sensor or bus), or fixed according to the selected
control sequence (P01 = heating (0) / cooling (1)).
Application
mode (via bus)
State changeover / conti-
nuous heating or cooling
Control sequence state
Heating Heating
Auto (0)
Cooling Cooling
Heating Heating Heat (1), (2), (8)
Cooling
Heating
Heating
Cooling
Cool (3), (5)
Cooling Cooling
Heating Heating Night purge (4),
Fan only (9)
Cooling Cooling
With a 4-pipe, 2-pipe with electric heater, and 2-pipe with radiator application, the
control sequence state depends on the application mode and on the heating /
cooling demand.
Application
Mode (via bus)
Heating / cooling demand Control sequence state
Heating Heating
No demand Heating / cooling depending
on last active sequence
Auto (0)
Cooling Cooling
Heating Heating
No demand
Heating
Heat (1), (2), (8)
Cooling
Heating
Heating
Cooling
No demand
Cooling
Cool (3), (5)
Cooling Cooling
Night purge (4),
Fan only (9)
No temperature control active Heating / cooling depending
on last active sequence
The value of the output as a function of the room temperature is shown in the
following diagram in case of a heating and cooling system:
0
TR
Wheat Wcool
100%
0 = Cool
1 = Heat
3171D01
Wheat = current heating setpoint
Wcool = current cooling setpoint
ACS
Heating OR cooling
Heating AND cooling
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3.6.3 2-pipe fan coil unit
On 2-pipe applications, the thermostat controls a valve in heating / cooling mode
with changeover (automatically or manually), heating only, or cooling only. Cooling
only is factory-set (P01 = 1).
ON/OFF control
The diagrams below show the control sequence for 2-position control.
Heating mode Cooling mode
½ SDH
1
0
½ SDH
w
Y
3076D01
T[°C]
Y1
Y
½ SDC
1
0
½ SDC
w
3076D02
T[°C]
Y1
T[°C] Room temperature SDH Switching differential “Heating” (P30)
w Room temperature setpoint SDC Switching differential “Cooling” (P31)
Y1 Control command “Valve” or “Compressor”
Modulating control: 3-position
The diagrams below show the control sequence for modulating PI control.
Heating mode Cooling mode
XpH
100
0
w
Y [%]
3076D03
T[°C]
Y1
XpC
Y [%]
100
0
w
3076D04
T[°C]
Y1
T[°C] Room temperature XpH Proportional band “Heating” (P30)
w Room temperature setpoint XpC Proportional band “Cooling” (P31)
Y1 Control command “Valve”
The diagrams only show the PI thermostat’s proportional part.
For the fan sequence see section 3.8.
Setting the s
equence and the control outputs
Refer to sections 3.4 "Applications", 3.6.1 "Sequences", and 3.7 "Outputs".
Control se
quence
ON/OFF output
Control sequence
modulating output
Notes:
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3.6.4 2-pipe fan coil unit with electric heater
On 2-pipe applications with electric heater, the thermostat controls a valve in
heating / cooling mode with changeover, heating only, or cooling only plus an
auxiliary electric heater.
Cooling only is factory-set (P01 = 1) with enabled electric heater (P13).
In cooling mode, the valve receives an OPEN command if the acquired tempera-
ture is above the setpoint.
The electric heater receives an ON command if the acquired room temperature
drops below “setpoint” minus “dead zone” (= setpoint for electric heater) while the
electric heater is enabled (parameter P13 = ON).
Note: “Setpoint for electric heater” is limited by parameter “Maximum setpoint for
Comfort mode” (P10).
In heating mode, the valve receives an OPEN command if the acquired tempera-
ture is below the setpoint. The electric heater is used as an additional heating
source when the heating energy controlled by the valve is insufficient.
The electric heater receives an ON command, if the temperature is below “setpoint”
minus “setpoint differential” (= setpoint for electric heater).
The electric heater is active in heating mode only and the control output for the
valve is permanently disabled when manual changeover is selected (P01 = 2).
Remote enabling / disabling of the electric heater is possible via input X1 or X2 for
tariff regulations, energy savings, etc.
Input X1 or X2 must be commissioned accordingly (parameters P38, P40). See
section 3.9 “Multifunctional input”.
The ele
ctric heater can also be enabled / disabled via bus.
If “Enable electric heater” input is used via bus, then the function must not be
assigned to a local input X1 or X2.
An electric heater must always be protected by a safety limit thermostat!
Heating or cooling with
auxiliary heater
Electric heating, active in
cooling mode
Electric heating in
heating mode
Electric heating and
manual changeover
Digital input “Enable
electric heater”
KNX
R
Enable electric heater
Note:
Caution
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ON/OFF control
The diagrams below show the control sequence for 2-position.
Heating mode
(automatic changeover = heating or heating only)
Cooling mode
(man. / auto. changeover = cooling or cooling only)
Y
½ SDH
1
0
½ SDH
w
3076D06
T[°C]
Y1
½ SDH
½ SDH
YE
w
D
Y
½ SDC
1
0
½ SDC
w
3076D05
T[°C]
Y1
½ SDH
½ SDH
YE
x
dz
Heating mode with manual changeover (P01 = 2)
(manual changeover = heating)
T[°C] Room temperature
W Room temperature setpoint
Y1 Control command “Valve” or “Compressor”
YE Control command “Electric heater”
SDH Switching differential “Heating” (P30)
SDC Switching differential “Cooling” (P31)
X
dz
Dead zone (P33)
½ SDH
1
0
½ SDH
w
Y
3076D07
T[°C]
YE
w
D
Setpoint differential (P34)
The diagrams only show the PI thermostat’s proportional part.
For the fan sequence see section 3.8.
For better temperature control performance with 2-pos electrical heater, we
suggest to set the switching differential heating (P30) to 1K
Setting the sequence and the control outputs
Refer to sections 3.4 "Applications", 3.6.1 "Sequences", and 3.7 "Outputs".
Control se
quence
ON/OFF output
Notes:
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3.6.5 4-pipe fan coil unit
On 4-pipe applications, the thermostat controls 2 valves in heating and cooling
mode, heating / cooling mode by manual selection, or heating and cooling mode
with changeover. Heating and cooling mode (P01 = 4) is factory-set.
The heating or cooling output can be released via operating mode button if
parameter P01 is set to Manual (P01 = 2).
If parameter P01 is set to changeover (P01 = 3), the heating and cooling output is
swapped according to the input state of the changeover sensor / switch / bus input
(see automatic heating and cooling changeover sensor in section 3.5). This mode
is used for th
e so-called “Main and secondary” application. This is a 4-pipe fan coil
unit system with different capacities of the 2 coils. The water circuit is changed to
optimize the energy exchange depending on the season (summer / winter):
– Winter: Large coil (V1) for heating, small coil (V2) for cooling
– Summer: Large coil (V1) for cooling, small coil (V2) for heating
T
B1
V2
V1
M1
3181D112
T
B2
Y
1
0
w
w
3181D117
T[°C]
YC
YH
Changeover
YH
YC
V1
V2
Changeover
Note:
This example shows
ON/OFF control;
for modulating con-
trol, connect the
appropriate output
terminals
The parameter for the heating and cooling changeover sensor (B2 in the above
diagram) must be set to 2 (X1 or X2, P38 or P40)
The thermostat assumes winter operation when B2 > P37 (factory setting 28 °C)
The thermostat assumes summer operation when B2 < P36 (factory setting 16 °C)
Heating and cooling
4-pipe application with
manual changeover
"Main and secondary"
application (4-pipe with
changeover)
Notes:
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The diagrams below show the control sequence for 2-position control.
Heating mode with manual selection
(P01 = 2)
Cooling mode with manual selection
(P01 = 2)
½ SDH
1
0
½ SDH
w
Y
3076D01
T[°C]
Y1
Y
½ SDC
1
0
½ SDC
w
3076D13
T[°C]
Y2
Heating and cooling mode (P01 = 04)
T[°C] Room temperature
w Room temperature setpoint
Y1 Control command “Valve” or “Comp.” (H)
Y2 Control command “Valve” or “Comp.” (C)
SDH Switching differential “Heating” (P30)
SDC Switching differential “Cooling” (P31)
Y
½ SDC
1
0
½ SDC
w
3076D11
T[°C]
Y2
½ SDH
½ SDH
Y1
½
x
dz
½
x
dz
X
dz
Dead zone (P33)
The diagrams only show the PI thermostat’s proportional part.
For the fan sequence see section 3.8.
Setting the s
equence and the control outputs
Refer to sections 3.4 "Applications", 3.6.1 "Sequences", and 3.7 "Outputs".
ON/OFF c
ontrol
Notes:
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3.6.6 Chilled / heated ceiling and radiator applications
For chilled / heated ceiling and radiator,
set the corresponding basic application
disable the fan (P52)
The following applications are available:
Application for
chilled / heated ceiling, radiator
Set basic application See
section
Sequences
Chilled / heated ceiling with
changeover
2-pipe 3.6.3
H (
\ )
C ( / )
Chilled / heated ceiling & el heater
(cooling only: disable el heater
via P13)
2-pipe and electric heater 3.6.4
El H +
H (
\ \ )
El H + C (
\ / )
C ( / )
Chilled ceiling and radiator
4-pipe 3.6.5
H + C
( \ / )
3.6.7 Compressor applications
For compressor applications,
set the corresponding basic application
disable the fan (P52) or set the fan speed (P53)
The following applications are available:
Application for compressor Set basic application See
section
Sequences
1-stage compressor
for heating or cooling
2-pipe 3.6.3
H (
\ )
C ( / )
1-stage compressor and electric
heater
(for cooling only: disable
electric heater via P13)
2-pipe and electric heater 3.6.4
El H + H (
\ \ )
El H + C (
\ / )
C ( / )
1-stage compressor
for heating and cooling
4-pipe 3.6.5
H + C
( \ / )
Minimum ON/OFF time: P48 / P49
Fan operation: P52 (0 = disabled, 1 = enabled)
Fan speed: P53 (1 = 1-speed, 2 = 3-speed)
Notes:
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3.6.8 Setpoints and sequences
On changeover applications, the Comfort setpoints for heating and cooling
sequence are the same (w).
On 2-pipe applications with electric heater, the Comfort setpoint is either at the first
heating sequence (in heating mode) or at the cooling sequence (in cooling mode).
The setpoints for Economy and Protection mode are below the Comfort setpoints
(heating) and above the Comfort setpoints (cooling).
They can be set via parameters P11, P12 (Economy mode) and P65, P66
(Protection mode).
w
3181D127
T[°C]
w
HeatProt
w
CoolProt
w
HeatEco
w
CoolEco
Comfort mode
Economy / Protection mode
Application
Heating Cooling
Heating Cooling
2-pipe
2-pipe and
electric
heater
1) If P13 = ON
2) In case of manual changeover (P01 = 2), the first heating sequence is disabled to prevent heating
(electric heater) and cooling (coil) at he same time
W = setpoint in Comfort mode
W
HeatEco/Prot
= setpoint heating in Economy or Protection mode
W
CoolEco/Prot
= setpoint cooling in Economy or Protection mode
YR = radiator sequence
YE = electric heater sequence
2-pipe applications
Y
T
W
HeatEco
/
Prot
W
CoolEco
/
Prot
YE
1)
Y
T
W
HeatEco
/
Prot
YE
2)
Y
T
W
YE
1)
Y
T
W
YE
2)
Y
T
W
CoolEco
/
Prot
Y
T
W
HeatEco
/
Prot
Y
T
W
Y
T
W
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On 4-pipe applications, the Comfort setpoint (w) is in the middle of the dead zone,
between the heating and cooling sequence.
The dead zone can be adjusted via parameter P33.
If manual changeover is selected, then either the cooling sequence or the heating
sequence is released. In this case, the Comfort setpoint is at the selected heating
or cooling sequence.
Comfort mode
Economy /
Protection mode
Application
Heating and cooling Heating only
1)
Cooling only
1)
Heating and/or
cooling
4-pipe
1) Manual changeover, P01 = 2
W = setpoint in Comfort mode
W
HeatEco/Prot
= heating setpoint for Economy or Protection mode
W
CoolEco/Prot
= cooling setpoint for Economy or Protection mode
YE = electric heater sequence
4-pipe applications
Y
T
W
Y
T
W
HeatEco/Prot
W
CoolEco
/
Prot
Y
T
W
Y
T
W
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3.7 Control outputs
3.7.1 Overview
Different control output signals are available. They need to be defined during
commissioning (see below).
Control output
Product no.
2-position
2-position
PWM
3-position DC 0…10 V
RDF301, RDF301.50,
RDF600KN
Y11, Y21
(2 x SPST)
--- Y11, Y21 *)
(1 x
/ )
---
*) Only on 2-pipe application
In the ACS tool, Y11 and Y21 are called Y1 and Y2.
The valve or compressor receives the OPEN/ON command via control output Y11
or Y21 when…
1. the acquired room temperature is below the setpoint (heating mode) or above
the setpoint (cooling mode).
2. the control outputs have been inactive for more than the “Minimum output
OFF-time” (factory setting 1 minute, adjustable via parameter P48).
OFF command when…
1. the acquired room temperature is above the setpoint (heating mode) or below
the setpoint (cooling mode).
2. the valve has been active for more than the “Minimum output on-time” (factory
setting 1 minute, adjustable via parameter P49).
The electric heater receives an ON command via the auxiliary heating control
output (Y…, see Mounting Instructions) when…
1. the acquired room temperature is below the “Setpoint for electric heater”
2. the electric heater has been switched off for at least 1 minute
The OFF command for the electric heater is output when…
1. the acquired room temperature is above the setpoint (electric heater)
2. the electric heater has been switched on for at least 1 minute
A safety limit thermostat (to prevent overtemperatures) must be provided externally.
Output Y11 provides the OPEN command, and Y21 the CLOSE command to the 3-
position actuator.
The factory setting for the actuator's running time is 150 seconds. It can be
adjusted via parameter P44.
The parameter is only visible if 3-position is selected via DIP switches.
1. When the thermostat is powered up, a closing command for the actuator
running time + 150% is provided to ensure that the actuator fully closes and
synchronizes to the control algorithm.
2. When the thermostat calculates the positions "fully close" or "fully open", the
actuator's running time is extended + 150% to ensure the right actuator
position is synchronized to the control algorithm.
3. After the actuator reaches the position calculated by the thermostat, a waiting
time of 30 seconds is applied to stabilize the outputs.
Overview of control
outputs
Note
ON/OFF control signal
(2-position)
Electric heater control
signal
(2-position)
Caution
3-position
control signal
Synchronization
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3.7.2 Control outputs configuration (setting via DIP switches
or tool)
The type of the control outputs on 2-pipe applications (2- or 3-position) is set via
DIP switches (see section 3.4).
The DIP
switches have no impact if the application is commissioned via tool.
Control outputs need to be set via ACS in this case.
In the tool, the parameter is called "Output Y1 / Y2", not Y11 / Y21).
Note
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3.8 Fan control
The fan operates in automatic mode or at the selected speed with manual mode.
In automatic mode, the fan speed depends on the setpoint and the current room
temperature. When the room temperature reaches the setpoint, the control valve
closes and the fan switches off or stays at fan speed 1 (parameter P60).
Factory setting for P60:
RDF600KN fan Off in dead zone
RDF301... fan speed1 in dead zone
The fan speed and mode can be changed via bus.
For this purpose, the fan command value needs to be enabled.
The fan speed and mode can be monitored via bus.
The individual switching points for ON of each fan stage can be adjusted via control
parameters P55…P57. The fan speed switch off point is 20% below the switch on
point. The diagrams below show fan speed control for modulating PI control.
w Room temperature setpoint
Q Fan speed
Y
H
Control demand “Heating”
Y
C
Control demand “Cooling”
XpH Proportional band “Heating”
XpC Proportional band “Cooling”
X
dz
Dead zone
w
XpH
Y
C
[%]
Q
Q3
Q2
Q1
Y
H
[%]
0
0
XpC
100
100
x
dz
The diagram only shows the PI thermostat’s proportional part.
On applications with 2-position control:
1) The switching point for low fan speed (Q1) is synchronized to the heating /
cooling output. Parameter “Switching point fan speed low” P57 is not relevant.
2) The maximum switching range of the fan (XpH
Fan
/ XpC
Fan
) is defined by the
switching differential (SDH/SDC) via a look-up table.
T[°C] Room temperature
w Room temperature setpoint
Q Fan speed
Y Control command “Valve”
SDH Switching differential “Heating”
SDC Switching differential “Cooling”
X
dz
Dead zone
XpH
Fan
Switching range for fan “Heating”
Cool
T[°C]
w
XpH
Fan
Q
Q3
Q2
Q1
T[°C]
Y
1
0
w
XpC
Fan
x
dz
SDC
SDH
XpC
Fan
Switching range for fan “Cooling”
KNX
R
Fan command value
Enable fan command
value
KNX
R
Fan operation
Fan stage 1-2-3
Fan output
3-speed fan control
with modulating
heating / cooling
control
Note:
3-speed fan control
with ON/OFF heating /
cooling control
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SDH/SDC [K] 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 >4.5
XpH
Fan
/XpC
Fan
[K] 2 3 4 5 6 7 8 9 10
The thermostat can control a 1- or 3-speed fan (selected via control parameter
P53). A 1-speed fan is connected to terminal Q1, a 3-speed fan to terminals Q1,
Q2 and Q3.
Fan operation can be limited to be active with cooling only or heating only, or even
be totally disabled via control parameter “Fan operation” P52.
When fan operation is disabled, the fan symbol on the display disappears and
pressing the fan button has no impact.
This function allows you to use the thermostat on universal applications such as
chilled / heated ceilings and radiator, etc. (see section 3.6.6).
In automatic
mode, a dwelling time of 2 minutes (factory setting) is active. The fan
maintains each speed for at least 2 minutes before it changes to the next speed.
This minimum on-time can be adjusted from 1…6 minutes via parameter P59.
In automatic fan mode and with the room temperature in the dead zone, the control
valve is normally closed and the fan disabled. With the “Fan kick” function, the fan
can be released from time to time at low speed for minimum on-time (see above)
even if the valve is closed.
This function can be used to avoid damage from moisture due to a lack of air circu-
lation, or to allow a return air temperature sensor to acquire the correct room
temperature.
Y
t [h:mm]
Q1
0
10385D22en
Periodic fan kick
Minimum
on-time
Periodic fan kick Minimum
on-time
The periodic fan kick time can be selected individually for Comfort mode via
parameter P60, and for Economy mode via parameter P61.
Note: Fan kick value “0” means the fan runs continuously in the dead zone.
Fan kick value “OFF” means the fan does not run in the dead zone.
When the fan starts from standstill, it starts at speed 3 for 1 second to ensure safe
fan motor start by overcoming inertia and friction (selected via parameter P58).
Q
Q3
Q2
Q1
0
T
1 sec
3181D22
Look-up table with
ON/OFF control
1-speed / 3-speed fan
Fan operation as per
heating / cooling mode,
or disabled
Fan minimum
on- time
Fan operation in dead
zone (fan kick)
Fan start
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When the electric heater is switched off, the fan overruns for 60 seconds
(parameter P54) to avoid overtemperature of the electric heater or prevent the
thermal cutout from responding.
In case of fan failure, the thermostat cannot protect the electric heater against
overtemperature. For this reason, the electric heater must feature a separate safety
device (thermal cutout).
The “Clean fan filter reminder” function counts the fan operating hours and displays
message “FIL
“ to remind the user to clean the fan filter as soon as the threshold
is reached. This does not impact the thermostat's operation, which continues to run
normally. The function is set via parameter P62 (default = Off (0)).
The “Clean filter reminder” is reset when the operating mode is manually set to
Protection and back.
In Auto Timer mode
, the default fan mode is automatic. The fan mode can be
changed to Manual by pressing the FAN button. The fan returns to the automatic
default mode after each switchover from Comfort to Economy mode, and vice
versa.
Fan overrun for electric
heater
Fan failure
Clean fan filter
reminder
KNX
R
Fault information
Fan in Auto Timer
mode
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3.9 Multifunctional input, digital input
The thermostat has 2 multifunctional inputs X1 and X2
An NTC type sensor like the QAH11.1 (AI, analog input) or a switch (DI, digital
input) can be connected to the input terminals. The functionality of the inputs can
be configured via parameters P38 + P39 for X1 and P40 + P41 for X2.
The current temperature or state of the inputs X1/X2 is available on bus for
monitoring purposes.
The parameters can be set to the following values:
# Function of
input
Description Type
X1/X2
0 Not used No function. --
1 External / return
air temperature
Sensor input for external room temperature sensor or
return air temperature sensor to acquire the current
room temperature, or floor heating temperature sensor
to limit the heating output.
Note: The room temperature is acquired by the built-in
sensor if the floor temperature limitation function is
enabled via parameter P51.
AI
KNX
R
Heating/
cooling
changeover
2 Heating / cooling
changeover
Sensor input for “Automatic heating / cooling
changeover” function.
A switch can also be connected rather than a sensor
(switch closed = cooling, see section 3.5).
Heatin
g / cooling changeover is also possible via bus.
In this case, the function must not be assigned to any
local input X1, X2. See also section 3.5.
Diag
nostic value 00 is displayed for closed contact /
100 for open contact, if a switch is connected.
AI /
DI
KNX
R
Window
state
3 Operating mode
switchover
Digital input to switch over the operating mode to
Economy.
If the operating mode switchover contact is active, user
operations are ineffective and “OFF” is displayed.
Operating mode switchover is also possible via bus. In
this case, the function must not be assigned to any local
input X1, X2. See also section 3.2.
DI
4 Dew point
monitor
Digital input for a dew point sensor to detect
condensation. Cooling is stopped if condensation
occurs.
DI
KNX
R
Enable elec-
tric heater
5 Enable electric
heater
Digital input to enable / disable the electric heater via
remote control.
Enable electric heater is also possible via bus. In this
case, the function must not be assigned to any local
input X1, X2. See also section 3.6.
DI
KNX
R
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# Function of
input
Description Type
X1/X2
KNX
R
Fault
information
6 Fault Digital input to signal an external fault (example: dirty air
filter).
If the input is active, “ALx” is displayed and a fault is
sent on the bus. See also section 3.11.8.
(Alarm x, with x = 1 for X1,
x = 2 for X2).
Note: Fault displays have no impact on the thermostat's
operation. They merely represent a visual signal.
DI
KNX
R
X1, X2
(Digital)
7 Monitor input
(Digital)
Digital input to monitor the state of an external switch via
bus, e.g. to send a local alarm via KNX to the central
controller.
DI
KNX
R
X1, X2
(Temp.)
8 Monitor input
(Temperature)
Sensor input to monitor the state of an external sensor
(e.g. QAH11.1) via bus, e.g. to send a local temperature
(0...49°C) via KNX to the central controller.
AI
Operational action can be changed between normally open (NO) and normally
closed (NC) via parameter P39, P41
Each input X1 or X2 must be configured with a different function (1…5).
Exception: 1 or 2 inputs can be configured as fault (6) or monitor input (7,8)
X1 is factory-set to “Operating mode switchover” (3), X2 to “External sensor”
(1)
For more detailed information, refer to section 3.4 “Applications”.
3.10 Handling faults
When the room temperature is outside the measuring range, i.e. above 49 °C or
below 0 °C, the limiting temperatures blink, e.g. “0 °C” or “49 °C”.
In addition, the heating output is activated if the current setpoint is not set to “OFF”,
the thermostat is in heating mode and the temperature is below 0 °C.
For all other cases, no output is activated.
The thermostat resumes Comfort mode after the temperature returns to within the
measuring range.
For fault status messages on the bus, see section 3.11.8.
In the event of a power fail
ure, all working conditions (operating mode, setpoint, fan
stage, all control parameter settings) are stored without time limitation.
When power returns, the thermostat reloads this data and continues to work in the
same conditions as before.
Temperature out
of range
KNX
R
Power failure
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3.11 KNX communications
The RDF KNX thermostats support communications as per the KNX specification.
S-mode Standard mode; engineering via group addresses.
LTE mode Logical Tag Extended mode, for easy engineering,
is used in conjunction with Synco.
3.11.1 S-mode
This mode corresponds to KNX communications.
Connections are established via ETS by assigning communication objects to group
addresses.
3.11.2 LTE mode
LTE mode was specifically designed to simplify engineering. Unlike with S-mode,
there is no need to create the individual connections (group addresses) in the tool.
The devices autonomously establish connections.
To make this possible, the following circumstances are predefined:
Every device or subdevice is located within a zone
Every data point (input or output) is assigned to a zone
Every data point (input or output) has a precisely defined "name"
Whenever an output and an input with the same "name" are located in the same
zone, a connection is established automatically, as shown in the following diagram.
RDF
/
RD
G
Chiller
Sensor
Outside temperature zone 31
Refr. distr zone 1
Geogr. zone 2.5.1
Heat distr zone 1
Cool demand
Outside temperature
Outside temperature
Cool demand
Outside temperature zone 31
Refr. distr zone 1
Heat demand
Time Switch
Operating mode Operating mode
Boiler
Heat distr zone 1
Heat demand
Geogr. zone 2.5.1 or 2.1.1
Room temperature
Definitions
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For a detailed description of KNX (topology, bus supply, function and setting of
LTE zones, filter tables, etc.), see "Communication via the KNX bus for Synco
700, 900 and RXB/RXL, Basic Documentation" [6]
LTE mode data points and settings are described in the Synco Application
Manual [12]
To engineer and commission a specific system, use the Synco700 planning and
commissioning protocol (XLS table in HIT, [7])
3.11.3 Zone addressing in LTE mode
(in conjunction with Synco)
In cases where RDF KNX room thermostats are used in LTE mode (e.g. in
conjunction with Synco), zone addresses need to be allocated.
The following zone address must be defined together with the Synco devices at the
planning stage depending on the application.
Short description Factory setting Parameter
Geographical zone (apartment) --- (out of service) P82
Geographical zone (room) 1 P83
Heat distr zone heating coil 1 P84
Refr distr zone cooling coil 1 P85
Note: “Subzone” of “Geographical zone” is fix 1 (not adjustable)
The device will send and receive LTE communication signals only if the zone
address is valid (not OSV = out of service).
Engineering and
commissioning
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The zones to be defined are as follows:
Geographical zone
(space zone)
(Apartment . Room . Subzone)
Apartment = ---, 1...126
Room = ---, 1...63
Subzone = fix 1
Zone in which an RDF KNX thermostat is physically located. Other
room-specific devices may also be located in this zone.
Information exchanged in this zone is related specifically to the device
like operating mode, setpoints, room temperature, etc.
The designations "Apartment", "Room" and "Subzone" do not need to
be taken literally. For example, Apartment can be used to refer to a
group of rooms, floor or section of a building. ”Room", however, really
does refer to a room.
Subzone is not used for HVAC devices. It is more relevant to other
disciplines, such as lighting. Subzone is fix at “1” and not visible.
The time switch information is expected from the same zone where
the thermostat is located (Residential).
If no time switch information is received from the same zone, the
thermostat will use the information received from the same apartment
but with room “1“ A.1.1 (Office).
Example:
Commercial building
In a commercial building, the
time switch information is sent by
the RMB795 central control unit.
The zones are divided in so
called “Room groups” (e.g. 1...4),
where each “Room group” can
have an individual schedule. A
room thermostat in the same
“Room group” need to have the
same Apartment Address.
Legend:
D = device address (P81)
G = geographical zone (P82, P83)
(Apartment.Room.Subzone)
D: 001
G: 3.1.1
Meeting room
Office 1
Server room
Office 2
2
4
D: 002
G: 2.1.1
D: 003
G: 2.2.1
D: 10
G: 1.1.1
Corridor
D: 12
G: 1.3.1
D: 11
G: 1.2.1
D: 004
G: 4.1.1
1
2
3
3171z20 1
Heat distribution zone
heating coil
Zone = ---, 1...31
Information related specifically to the hot water system in heating coils
is exchanged within this zone. The zone also includes a Synco device
to process the information (e.g. RMH7xx or RMU7xx with
changeover).
Refrigeration
distribution zone
cooling coil
Zone = ---, 1...31
Information related specifically to the chilled water system is
exchanged within this zone (e.g. cooling demand). This zone also
includes a Synco device to process the information (e.g. RMU7xx).
Outside temperature
zone
Zone = fixed to 31
RDF301...: SW < V3.7: fixed to 1
Outside temperature received in outside temperature zone 31 will be /
can be displayed on the room thermostat when commissioned
accordingly (parameter P07 = 2).
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3.11.4 Example of heating and cooling demand zone
The building is equipped with Synco controls on the generation side and RDF /
RDG thermostats on the room side.
RMH760 RMH760 RMB795
Konnex TP1
RDG...RDU...
RDF...
T
T
T
T
1
2
P3171Z01
Heat requistion
Heat demand
Heat distr zone 1
Heat source
Controller 1 Controller 2
Controller 3
Controller 4 Controller 5 Controller 6
Controller 1 Controller 2 Controller 3 Controller 4 Controller 5 Controller 6
Heating circuit
fan coil
Fan coil
room A
VAV box
room B
Fan coil
room C
DHW heating
Heat demand
Heat demand
Heat demand
Heat demand
Heat requistion
Heat distr zone
source side: 1
Heat distr zone 2
Heat distr zone 2 Heat distr zone 2
Heat distr zone 2
Setting values
MV MV
T
T T
In the case of a typical application, the individual RDF / RDG room thermostats
send their heat demand directly to the primary controller (in the above example to
the RMH760).
(1) and (2) designate the numbers of the distribution zone.
This type of application can analogously be applied to refrigeration distribution
zones
If no 2-pipe fan coil is used, heat and refrigeration demand signals are sent
simultaneously to the primary plant
Explanation relating to
the illustration
Notes:
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Parameter
Name Factory setting Range
Expert level
P61 Periodic fan kick Eco OFF 0…359 min, OFF(360)
P62 Service filter Off (0) Off, 100…9900 h
P65 Protection heating setpoint 8 °C OFF, 5…WCoolProt;
WCoolProt = 40 °C max
P66 Protection cooling setpoint OFF OFF, WHeatProt… 40;
WHeatProt = 5°C min
P68 Temporary Comfort mode 0 (= OFF) 0...360 min
P69 Temporary Comfort setpoint OFF OFF = Disabled
ON = Enabled
P71 Restore factory setting OFF OFF = Disabled
ON = Reload start
“8888” is displayed for 3s during
reload process
Parameter
Name
Factory setting Range
Communications
P81 Device address
255 1…255
P82 Geographical zone (apartment) --- ---, 1...126
P83 Geographical zone (room) 1 ---, 1...63
P84 Heat distr zone heating coil --- ---, 1...31
P85 Refrig distr zone cooling coil --- ---, 1...31
P88 Transformation Precomfort 0 0 = Economy
1 = Comfort
1) Physical address = Area.Line.DeviceAddress. Factory setting for Area = 0, Line = 2.
Can be changed by special management service e.g. from line coupler or via ACS commissioning tool.
2) Type = geographical zone A.R.S. In RDF sub zone = fixed value 1
Parameter
Name Range
Diagnostics & test
d01 Application number NONE = (No application)
2P = 2-pipe
2P3P = 2-pipe 3-position
2PEH = 2-pipe with electric heater
4P = 4-pipe
d02 X1 state 0 = Not activated (for DI)
1 = Activated (DI)
0…49 °C = Current temp. value (for AI)
00
= H/C Input shorted
100
= H/C Input open
d03 X2 state 0 = Not activated (for DI)
1 = Activated (DI)
0…49 °C = Current temp. value (for AI)
00
= H/C Input shorted
100
= H/C Input open
d05 Test mode for checking the Y11/Y21 actuator's running
direction 3)
"---" = no signal on outputs Y11 and Y21
OPE = output Y11 forced opening
CLO = output Y21 forced closing
3) This parameter can only be quit when the setting is back at “---”.
Press buttons + and – simultaneously to escape.
44

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