Siemens RDU341 Basic Documentation

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Semi-flush mount room thermostats with KNX communications RDU341

Basic Documentation

Edition: 1.1

CE1P3172en 2015-06-08

Building Technologies

2 / 68 Siemens RDU341 Basic Documentation CE1P3172en

Building Technologies 2015-06-08

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 Documen t use / reque st to the reader .................................................... 5

1.4 T arg et audience, prerequ isites ............................................................... 6

1.5 Glossary ................................................................................................ 6

2. Summary .............................................................................................. 7

2.1 Typ es .................................................................................................... 7

2.2 Ordering ................................................................................................ 7

2.3 Functions ............................................................................................... 7

2.4 Integra tion via KNX bus ......................................................................... 8

2.5 Equipment combination s ...................................................................... 10

2.6 Accessories ......................................................................................... 1 1

3. Functions ........................................................................................... 12

3.1 T emperature control ............................................................................. 12

3.2 Operating modes ................................................................................. 13

3.2.1 Differen t w ays to influe nce the op era ting mod e .................................... 14

3.2.2 Commun ication examples .................................................................... 17

3.3 Room temperature setpoint s ................................................................ 19

3.3.1 Descr iption .......................................................................................... 19

3.3.2 Setting and adjus ting se tpo ints ............................................................ 20

3.4 Applica tions overview .......................................................................... 22

3.5 Additional functions .............................................................................. 23

3.6 Control sequ ences ............................................................................... 25

3.6.1 Seque nces overview (s etting via para meter P01) ................................. 25

3.6.2 Applica tion mode ................................................................................. 26

3.6.3 Minimu m and maximu m air volume ...................................................... 28

3.6.4 Single-du ct .......................................................................................... 29

3.6.5 Single-du ct with elec tric he ater ............................................................ 30

3.6.6 Setpoint s and sequences ..................................................................... 32

3.7 Control outputs .................................................................................... 33

3.7.1 Overview ............................................................................................. 33

3.7.2 Control outpu t s con figura tion (s ett ing via D IP sw itch es or tool) ............. 33

3.8 Multifunc tiona l input, digital inpu t.......................................................... 34

3.9 Handling faults ..................................................................................... 36

3.10 KNX communication s........................................................................... 36

3.10.1 S-mode................................................................................................ 36

3.10.2 L TE mode ............................................................................................ 3 6

3.10.3 Zone addre ss ing in LTE mode (in conjunction w ith Synco) ................... 37

3.10.4 Example of hea t ing and co ol ing de man d zon e ..................................... 39

3.10.5 Send heartbea t and receive timeo ut ..................................................... 40

3.10.6 Startup ................................................................................................. 40

3.10.7 Heating demand .................................................................................. 4 0

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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 over run af ter sw itching o ff the elec tric heat er ..................... 41

3.10.11 Fault function on KNX .......................................................................... 42

3.10.12 Emerge ncy contro l (LTE Mode only) .................................................... 4 3

3.11 Commun ication objects (S-mo de) ........................................................ 44

3.1 1.1 Over view ............................................................................................. 44

3.1 1.2 Description of commun ication objec ts .................................................. 45

3.12 Control parameters .............................................................................. 47

3.12.1 Parame ter setting via local HMI............................................................ 4 7

3.12.2 Parame ter setting / dow nload via tool ................................................... 48

3.12.3 Parame ters of the "Service level" ......................................................... 49

3.12.4 Parame ters of the "E xpert le vel with diagn os tics an d test" ................... 50

4. Handling ............................................................................................. 52

4.1 Mounting and inst allation ..................................................................... 52

4.2 Commissioning .................................................................................... 53

4.3 Operation............................................................................................. 55

4.4 Remote operation ................................................................................ 56

4.5 Disposa l .............................................................................................. 56

5. Supporte d KNX tools ......................................................................... 57

5.1 ETS ..................................................................................................... 57

5.1.1 Parame ter setting s in ETS ................................................................... 57

5.2 ACS tool .............................................................................................. 57

5.2.1 Parame ter settings in ACS ................................................................... 58

5.2.2 Operation and moni toring with ACS ...................................................... 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 Conne ction terminals ........................................................................... 62

6.2 Conne ction diagrams ........................................................................... 62

7. Mechanic al design ............................................................................. 63

7.1 Genera l ............................................................................................... 63

7.2 Dimensions .......................................................................................... 64

8. Tec hnical 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, d isposal notes, declaration information and connect ion 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 communicati ons, 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-d ocument ation/knx-associati on-books /index.p hp

)

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 Docum entati on

[7]

XLS template

in HIT

Planning and commissioning protocol,

communicati on 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 docum ents

[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 docum ents

[18] 565-132 Installation I nstructions: 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 m ay be duplicated and distributed only with the express permission of Siemens, and may be passed only t o authorized persons or companies with the required technic al 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

· Docum ents are automatically amended as a consequence of modifications and

corrections to the products described Please make sure that you ar e 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 br anch office. The addresses of the Siemens Regi onal Companies are available at

www.buildingtechnologies.si emens.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 (equipm ent, 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.siem ens.com/cont ent/00001123/def ault.aspx

· From the Siemens branch office near you

www.buildingt echnologies.siem ens.com or from your system supplier

· From the support team at headquarters fieldsupport-z ug.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 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 associated 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 usi ng 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 – ACS 700 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!

KNX

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2. Summary

2.1 Types

Product number Stock number Operating voltage Control output s

Housi ng

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 activ ated during commissioning using one of the following tools:

· Synco ACS

· ETS

· Local DIP switch and HMI

· Operat ing modes: Comfort, Economy (Energy Saving) and Protection

· Out puts for DC 0…10 V actuator and AC 230V electric heater (ON-OFF)

· Automati c or manual heating / cooling changeover

· Backlit display

· AC 24 V operating voltage

· Room temperat ure control via built-in temperature sensor or external room

temperature / return air temperature sensor

· Changeov er between heating and cooling mode (automatic via local sensor or

bus, or manually)

· Selecti on of applications via DIP switches or commissioning tool (ACS700)

· Sel ect operating mode via operating mode button on the thermostat

· Temporary Comfort mode extensi on

· Displ ay of current room temperature or setpoint in °C and/or °F

· Displ ay of outdoor temperature or time of day via KNX bus

· Minim um and maximum limitation of room temperature setpoint

· Mi nimum 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 – Electri c heat er enabl e – Fault i nput – 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:

· Int egrati on into Synco 700 system via LTE mode (easy engineering)

· Integrat ion into Synco living via group addressing (ETS)

· Int egrati on into DESIGO and Apogee via group addressing (ETS) or individual

addressing

· Integrat ion into third-party systems via group addressing (ETS)

The following KNX functions are available:

· Central tim e program and setpoints, e.g. when using the RMB795 central control unit

· Out side temperature or time of day via bus displayed on thermostat

· Rem ote operation and monitoring, e.g. using the RMZ792-B bus operator unit

· Rem ote operation and monitoring with web browser using the OZW772 or

OZW775 web server

· Maxim um energy efficiency due to exchange of relevant energy information, e.g. with Synco 700 controll ers (e.g. heating demand, cooling demand)

· Alarmi ng, e.g. external fault contact, condensation, etc.

· Monit oring 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 indiv idual addressing can be used. The workflow for integration into DESIGO / Apogee is the same as with standard KNX devices.

Synco to po logy

Legend:

DESIGO, Apogee and third-party systems

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2.5 Equipment combinations

Type of unit Product no.

Data

sheet

Cable temperat ure sensor, cable length 2.5 m NTC (3 kW at 25 °C)

QAH11.1

1840

Room temperature sensor NTC (3 kW at 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

Electromotori c actuator, DC 0..10V (for valves 5.5 mm)

SQS65…

4573

Thermal actuat or, 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-flushmount 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 setpoi nt by delivering actuator control commands to heating and/or cooling equipment. The following cont rol 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, selectable 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 tem perature (internal or external sensor) is al so available as information on the bus.

· W ith 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

/ i ndicate 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 displ ay of the current temperature or setpoint in °C and °F (parameter P07 = 1) is possible on the thermostats.

The outside temperat ure 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 corr espondi ng 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

KNX

Room temperature

Concurrent displ ay of °C and °F

KNX

Outside temperature via bus

KNX

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 setpoi nts are assi gned 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) – Ec onomy 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 switchov er: Only one input source must be used, either local

input X1/X2 or KNX bus. User operations are ineffec tive and “OFF” is displayed if the operating mode switchover contact is active, or if "Window state" is sent via bus.

In Protection mod e, 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

Room operating mode: State

Auto Time r

Comfort

Economy

KNX

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

· Operati ng mode is not Auto Tim er

· No time schedule via bus

Room operating mode selector (preselection)

· Temporary Comfort extension is active “Timer” function

· Operating mode switchov er contact Room operating mode contact

Bus command

KNX

Room op. mode

· "Window state" sent via bus Room operating mode contact

· Time schedule available via bus

à local operating mode is set to Auto Timer

· Tim e schedule sends Protection mode via bus

à operating mode cannot be changed locally

Time switch

The following table shows the priorities of diff erent interventions. A lower number means a higher priority.

Priority Description Remark



Commissioning In parameter setti ng mode (highest priority), you c an 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 pri ority 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 t hermostat.



"Window state" via bus "Window state" sent via bus has the same effect as the operat ing

mode switchov er 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... – Econom y was sent via bus – ex tended 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 inter v e ntions

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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 T imer 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 switchover 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 t he operating mode button (user profile) can be defined via parameter P02, factory setting is P02 = 1.

P02 Without time

schedule

With time schedule via bus

Description

1 à

· Switching m anually between 2 modes, Econom y i s not available (f actory sett ing)

· Suit ed for hotel guest rooms or commercial buildings.

· If a time schedule via bus is available, then the Comfort

mode can be temporarily ex tended (see below)

2 à à

à à à

· Switching m anually between 3 modes

· Suit ed 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 keycar d 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 ineffec tive 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

Room operating mode: Window state

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Comfort mode can be t emporarily 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 selecti on 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 swit ch the thermostat to Protection.

Temporary timer to extend the Comfort mode

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3.2.2 Communication examples

The following ex amples show two typical applications of a central tim e schedule in conjunction with local control of the room operating mode. The room operating mode in rooms 1…2 of a building is determi ned by the time schedule. Window contacts are fitted in all rooms.

The following condi tions 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

06:00

20:00

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 operating 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 c hanges to Economy as set by parameter “Transformation Precomf ort” (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 aft ernoon, the user switches the thermostat off by pressing t he 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 i s

reset by the time schedul e

· 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

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 v ia 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 interv ention always wins.

If the “Temporary setpoint” function is enabled via parameter P69, the Comfort setpoint adjusted via the +/- buttons or vi a 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 m inimum 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 cooli ng applications (e.g. single duct wit h 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 coo li ng

P09 < P10

Cooling setpoi nt adjustable 18…25 °C Heating setpoint adjustable 18…25 °C

P09 ≥ P10

Cooling setpoi nt 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 t o OFF for cooling.

Comfort mode

Temporary setpoi nt

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 setpoi nts – in EEPROM i n the form of parameters – in the runtime memory

The table below shows the interr elations:

Setpoint setting

Sto

red in EE PROM

of thermostat

Commis

sioning

– HMI – Tool download

Input LTE mode

Input S

-mode

Comfort basic setpoint Dead zone Comfort 1)

Setpoints Heating Setpoints Cooli ng

Comfort basic setpoint P08 Comfort basic setpoint

P33 Dead zone Comfort 1)

Setpoint Economy Heating Setpoint Economy Cooling

Setpoints Heating Setpoints Cooli ng

P11 Economy Heating

P12 Economy Cooling

Setpoint Prot ection Heating Setpoint Prot ection Cooling

P65 Protection Heating

P66 Protection Cooling

Current

runtime

setpoints in thermostat

Setpoint

adjustment

New

current

runtime setpoints in thermostat

Input LTE mode

Input S

-mode3)Local ope

ration 3)

Comfort setpoi nt 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 Heati ng Protection Cooling

Protection Heating

Protection Cooling

Effective room operating mode Current setpoint (used by the thermostat for temperature control)

Caution

KNX

Comfort basic setpoint Comfort setpoint

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1) Only required for heating AND cooling applications (see section 3.6.6)

2) The shift is added to the local shift (LTE mode only)

3) 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.

· The supported communicati on objects are different in LTE mode and S-mode

· Change s via the local HMI or via KNX have the same priority (last always wins)

· Adj usting the Comfort basic setpoint will reset the runtime Comfort setpoint to

the basic setpoint

· Central setpoi nt shift is used for summer / winter compensation in particular

· Setpoi nt shift does not affect the setpoints stored in parameters P08, P11, P12,

P33

· Local shift and central shift are added together

· Appli es only to Comfort and Economy setpoints; Protection setpoints are not

shifted central ly

· 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 setpoint s 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)

KNX

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 f ollowing applications, which c an be configured using the DIP switches inside the front panel of the unit or a commissioning t ool.

All DIP switches need to be set to OFF (remote configuration, factory setting) to select an application via commissioning tool. In this case the output signal type needs to be set in ACS as well.

The tool offers the applications printed in bold text (basic applications).

Application and output signal Diagram DIP switches Remote configuration

via commissioning tool (factory setting)

· Synco ACS

· ETS

1ON2 3

Single duct

· Single duct heating or cooli ng DC 0...10 V output signal normal

3192S07

MVM

1ON2 3

· Single duct heating or cooling

DC 10...0 V output signal inverted

1ON2 3

Single duct with electric heater

· Single duct heating and cooling, with

electric heater

DC 0...10 V output signal normal

3192S08

MVM

1ON2 3

· Single duct heating and cooling, with

electric heater

DC 10...0 V output signal inverted

1ON2 3

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3.5 Additional functions

The supply air temperature sent by the primary controller indicates whether cool or warm air is supplied. The controller determines the necessity to open or close the air damper according to the supply air temperature, the room temperature setpoint and the current room temperature. If no Supply air temperature is available via bus, then the air changeover is cooling per default.

With application “Single duct”, the changeover can also be accomplished via a local multifunctional input X1/X2 (parameter P38, P40).

Only one input source must be used, either local input X1/ X2 or KNX, and parameter “control sequence” must be set to automatic heating / cooling changeover (parameter P01 = 3).

Functionality of the local changeover input see below. See also section 3.8.

If a cable temperature sensor (QAH11.1 + ARG86.3) is connected to X1 / X2, and parameter P38 / P40 is = 2, the water or supply air temperature acquired by the sensor is used to change over from heating to cooling mode, or vice versa. When the water / air 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 / air temperature is between the 2 changeover points immediately after power-up, the thermostat starts in heating mode. The water / air temperature is acquired at 30-second intervals and the operating state is updated accordingly.

M Operating mode C oolin g m od e Tw Water temperature

Heating m od e

The QAH11.1 cable temperature sensor for automatic heating / cooling changeover can be replaced by an external switch for manual, remote changeover:

Contact open à heating mode Contact closed à cooling mode

The sensor or switch can be connected to input termi nal X2 or X1, depending on the commissioning of the inputs (P38, P40). See also section 3.8.

Air heating / cooling changeover

KNX

Supply air temperature

Automatic heating /

cooling changeover via

changeover sensor

Changeover switch

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If manual heating / cooling changeover is commissioned (P01 = 2), then heating / cooling mode cannot be changed via bus / changeover 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 acc ordingly. See section 3.8.

Dew point monit oring is essential to prevent condensation on the chilled ceiling. 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 sym bol “

” 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 3.8.

If the “Button lock” function is enabled by parameter P14, the buttons will be locked or unlocked by pr essing the right button for 3 seconds. If “Auto lock” is configured, the thermostat will automatically lock the buttons 10 seconds after the last adjustment.

Manual heating / cooling changeover

External / return air temperature sensor

Dew point monitoring

KNX

Fault state Fault information

Button loc k

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3.6 Control sequences

3.6.1 Sequences overview (setting via parameter P01)

The mode of the air control sequence can be set via parameter P01. It is only available with application "Si ngle duct"

In all application the changeover of the air sequence can be done via supply air temperature sent by the primary controller.

The available sequences depend on the application:

Parameter

P01 = 0

P01 = 1

P01 = 2

P01 = 3

Sequence

c/o signal on

X1 / X2 / D1

c/o signal

via bus

Supply air temp.

via bus

Available for basic application:

Heating Cooling Manually select

heating or cooling sequence

Automatic heating / cooling changeover

Single duct

ü ü ü ü

1)ü1)

Single duct & el heater

- - - -

1) Changeover air

For the relation bet ween setpoi nts and sequences, see section 3.6.6.

Notes:

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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 RDU KNX thermostats support the following commands:

# Application

mode

Description Control sequence

enabled

0 Auto T hermostat automatically changes between

heating and cooli ng

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 possibl e (if necessary). The thermostat will only allow heating

Heating only

3 Cool T hermostat is onl y allowed to provi de cooling Cool ing only 4 Night purge If “Night purge” is received, the room should

be aired with cool outside air if necessary. The thermostat will open the damper and does not heat/cool with the coils or the electric heater. Function will be terminated by any operation on the thermostat.

Open damper fully if night purge condi tion is val id

5 Pre-cool If “Pre-c ool” 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 or damper fully opened respectiv ely. Function will be terminated by any operation on the thermostat

Open damper fully

With all other commands, the thermostat behaves like in Auto mode, i.e. heating or cooling according to demand.

1) Conditions for “Night purge” functi on: – Current room temperature > Comfort cooling setpoint – If supply air temperature via KNX is available:

Supply air temperature < current room temperature

KNX

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 cont rol is disabled.

With a single-duct application, the control sequence state is determined by the applicati on mode (see section 3.6.2) and by the state of the heating / cooling changeover 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 / continuous heating or cooling

Control sequence state

Auto (0)

Heating Heating Cooling Cooling

Heat (1), (2), (8) Heating Heating

Cooling

Heating

Cool (3), (5)

Heating

Cooling

Cooling Cooling Night purge (4), Fan only (9)

Heating Heating

Cooling Cooling

With applications "Single duct with electric heater / radiator / heating / cooling coil", the control sequence state depends on the application mode and on the heating / cooling demand.

Application Mode (via bus)

Heating / cooling demand Con trol sequence state

Auto (0)

Heating Heating

No demand Heating / cooling depending

on last active sequence

Cooling Cooling

Heat (1), (2), (8)

Heating Heating

No demand

Heating

Cooling

Heating

Cool (3), (5)

Heating

Cooling

No demand

Cooling

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:

Wheat Wcool

100%

0 = Coo l

1 = Hea t

3171D01

Wheat = current heating setpoint Wcool = current cooling setpoint

ACS Operating

Heating OR cooling

Heating AND coo li ng

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3.6.3 Minimum and maximum air volume

The factory setting for minimum and maximum air volume is 0 / 100% respectively. These values can be changed using parameters P63 / P64.

If Vmin is greater than 0, a minimum air flow of Vmin is assured in Comfort and Economy mode. In Protection (or Economy mode with setpoint = OFF), Vmin is fixed to 0.

Comfort or Economy mode Protection mode: Vmin always = 0

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3.6.4 Single-duct

On single-duct applications, the thermostat controls an actuator (air damper, VAV system, valve et c.)…

– in heating / cooling mode with changeover (automatic or manual), – heating only m ode, – or cooling only m ode.

Cooling only is factory-set (P01=1).

The output signal for the air flow can be limited to a minimum and maximum value if required (see section 3.5).

Modulating control: DC 0…10 V

The diagrams below show the control sequence for modulating PI control.

Heating only (P01 = 0) Cooling only (P01 = 1)

Changeover (P01 = 2, 3)

T[°C] Room temperature XpH Proportional band “Heating” w Room temperature setpoint XpC Proportional band “Cooling” Y Control command “Actuator” Vmin Min. limitation for output

Vmax Max. limit ation for outpu t

The diagrams show the PI controller’s proportional part only.

Setting the sequence and the control outputs

Refer to section 3.4, section 3.6.1, and section 3.7.

Note:

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3.6.5 Single-duct with electric heater

General rule: In case of insufficient air flow, the thermostat cannot protect the electric heater against overtemperature. Therefore the electric heater MUST feature a separate safety device (thermal cutout).

On single-duct applications with electric heater, the thermostat controls a valve plus an auxiliary electric heater. Parameter P01 is not available.

The output signal for the air flow can be limited to a minimum and maximum value if required using parameters P63 and P64. With application " Single-duct with electric heater", the min. value of P63 is overridden, so that the air flow never drops below 10 % while the electric heater is ON.

The air flow starts to rise depending on the acquired room temperature, the current supply air temperature (if available) and the setpoint. The electric heater receives an ON command when the acquired room temperature drops below setpoint (= setpoint for electric heater).

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 acc ordingly (parameters P38, P40). See section 3.8.

The electric heater can also be enabled / disabl ed 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. On start-up of the controller and if the primary controller sends the information that the primary f an i s off, the t hermostat disables the electric heat er, see section

3.10.9.

To avoid overheating of an electric heater when switched off, the air fl ow signal of Vmin must be maintained for a preset "fan overrun time" (P54, factory setting 60sec). In conjunction with a Synco primary controll er it will be assured that the primary fan keeps running during the fan overrun time.

See also section 3.10.10.

Caution

Electric heating, active in cooling mode

Digital input “Enable electric heater”

KNX

Enable electric heater

Note

"Fan overrun tim e"

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Sequences

ON/OFF electri c heater

Without a valid bus signal for changeover air, the air volume is only increased for cooling:

Y Output signal TR Room temperature W Effective setpoint Comfort H Heating sequence C Cooling sequence

YV Volume flow rate YE Electric heater

XpH Proportional band heating XpC Proportional band cooling Vmin Minimum volume output

Vmax Maximum volume output

The diagrams only show the PI thermostat’s proportional part.

Setting the sequence and the control outputs

Refer to section 3.4, section 3.6.1, and section 3.7.

Note:

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3.6.6 Setpoints and sequences

· Comf ort setpoint (W) is in the currently active heating or cooling sequence

· Comf ort setpoint (W) is in the heating sequence

· If the supply air temperature is available (via KNX), the air

flow may also increase when t he room temperature is below the heating setpoi nt

· If no supply air temperature is available, sequence for air flow control i s Cooli ng only

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). .

Comfort mode

Economy / Protection mode

Application

Heating Cooling

Single duct

Heating and Cooling Heating and Cooling

Single duct with el. heate

W = setpoint in Comfort mode W

HeatEco/Prot

= setpoint heating in Economy or Protection mode

CoolEco/Prot

= setpoint cooling in Economy or Protection mode Y = air / water sequence T = room temperature

The dead zone can be adjusted via parameter P33.

Single duct / single duct with heating / cooling coil

Single d uct with el. heater / radiator / floor heating

Changeover air

Economy, Protection

eatEco/P

rot

CoolEco/P

rot

eatEco/P

rot

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3.7 Control outputs

3.7.1 Overview

Different control output signals are availabl e. They need to be defined during commissioning (see below).

Control output

Product no.

ON/OFF 3-position DC 0…10 V

RDU341 Y21 -- Y10

The demand calculated by the PI control from the current room temperature and setpoint is provided to the damper actuator as a continuous DC 0...10 V signal via output Y10.

The electric heater receives an ON command via the auxiliary heating control output Y21:

1. When the acquired room temperature is below “setpoint for electric heater”.

2. When the electric heater has been switched off for more than 1 minute.

The OFF command for the electric heater is output:

1. When the acquired room temperature is above the setpoint (electric heater).

2. When the electric heater has been switched on for more than 1 minute. A safety thermostat (to prevent overheating) must be provided externally.

3.7.2 Control outputs configuration (setting via DIP switches or tool)

Use DIP switch #3 on the inner side of the front panel to commission the signal type of Y10 prior to snapping it to the base.

DIP switch number 3

DC 0…10 V output signal normal (factory setting) OFF DC 0…10 V output signal i nv erted (DC 10...0 V) ON

If the application is configured via tool (DIP switches #1 and #2 = OFF), then the signal type of Y10 must also be configured via tool.

Note: During startup, the controller reloads the c ontrol parameter factory settings after each DIP switch settings change.

Overview of control outputs

DC 0..10 V control signal

Electric heater control signal

(2-position)

Caution

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3.8 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, 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 tem perature sensor to acquire the current room temperature, or floor heating temperature sensor to limit the heating output.

KNX

Supply air temperature

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).

With single-duct applications, the input changes over the air sequence.

Heating / cooling changeover is also possibl e via bus. In this case, the f unction must not be assigned to any local input X1, X2, D1. See al so section 3.5.

Diagnostic value 0 ˚C is displayed for closed contact / 100 ˚C for open contact, if a switch is connected.

AI /

KNX

Window state

Operating mode switchover

Digital input to switch over the operating mode to Economy. If the operating mode switchover contact is active, user operations are i neffective and “OFF” is displayed.

Operating mode switchover is also possible via bus. In this case, the f unction must not be assigned to any local input X1, X2. See also section 3.2.

4 Dew point

monitor

Digital input for a dew point sensor to detect condensation. Cooling is stopped if condensation occurs.

KNX

Enable electric 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 f unction must not be assigned to any local input X1, X2. See also section 3.6.

KNX

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# Function of

input

Description Type

X1/X2

KNX

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 3.10.11. (Alarm x, with x = 1 for X1, x = 2 for X 2). Note: Fault displays have no impact on the thermostat's operation. They merely represent a visual signal.

KNX

X1, X2 (Digital)

Monitor input (Digital)

Digital input to monitor the state of an external switch via bus.

KNX

X1, X2 (Temp.)

Monitor input (Temperature)

Sensor input to m onitor the state of an external sensor (e.g. QAH11.1) via bus.

· Operational action can be changed between normally open (NO ) and normally

closed (NC) via parameter P39, P41.

· Each input X1, X2 m ust 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 “O perating mode switchover” (3), X2 t o “External sensor”

(1)

For more detailed information, refer to section 3.4.

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3.9 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 out put is activated.

The thermostat resumes Comfort mode after the temperature returns to within the measuring range.

For fault status messages on the bu s, see section 3.10.11.

3.10 KNX communications

The RDU KNX thermostats support comm unications as per the KNX specificati on. S-mode Standard mode; engineering via group addresses. L TE mode Logical Tag Extended mode, for easy engineering,

is used in conjunction with Synco.

3.10.1 S-mode

This mode corresponds to KNX communications. Connections are established via ETS by assigning communication objects to group addresses.

3.10.2 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 predefi ned:

· Ev ery device or subdevice is located within a zone

· Ev ery data point (input or output) is assigned to a zone

· Ev ery 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.

Tempera ture out of range

KNX

Definitions

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RDU

Air handling unit

Sensor

Outside temperature zone 1

Air distr zone 1

Geogr. zon e 2.5.1

Air d eman d

Outsi d e temper ature

3172Z02en

Outsi d e temper ature

Air demand

Outside temperature zone 1

Air distr zone 1

Time Switch

Operating mode Oper a ting mod e

Geogr. zone 2.5.1 or 2.1.1

Room temper ature

· For a detailed description of KNX (topology, bus supply, functi on 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])

3.10.3 Zone addressing in LTE mode (in conjunction with Synco)

In cases where RDU KNX room thermostats are used in LTE mode (e.g. in conjunction wit h 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 Facto ry setting Parameter

Geographical zone (apartment) --- (out of service) P82 Geographical zone (room) 1 P83 Air distribution zone --- (out of service) P87

Note: “Subzone” of “Geographical zone” is fix 1 (not adjustable)

The device will send and receive LTE communicati on 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 f ollows:

Geographical zone (space zone)

(Apartment . Room . Subzone) Apartment = ---, 1...126 Room = ---, 1...63

Subzone = fix 1

Zone in which an RDU KNX thermostat is physically located. Other room-specific devices may also be located in this zone.

Information ex changed in this zone is related specifi cally 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", howev er, 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 RMB975 central control unit. The zones are divi ded 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

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

3171z201

Air distribution zone

Zone = ---, 1...31

This Distribution zone is for air applications (VAV, CAV). Information related specifically to the air handling system i s exchanged within this zone (e.g. air demand). This zone also includes a Synco device to process the information (e.g. RMU7xx).

Outs ide te m pe r a ture zone

Zone = fix 1

Outside temperature received in outside temperature zone 1 will be / can be displayed on the room thermostat when commissioned accordingl y (parameter P07 = 2).

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3.10.4 Example of heating and cooling demand zone

The building is equipped with Synco controls on the generati on side and RDU / RDG thermostats on the room side.

RMH760 RMH760 RMB795

Konnex TP1

RDG...RDU...

RDF...

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 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

In the case of a typical application, the individual RDU / RDG room thermostats – when used with the RMB975 central control unit – signal t heir heat demand directly to the primary cont rol ler (in the above example to the RMH760).

(1) and (2) designate the numbers of the distribution zone.

· Thi s 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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3.10.5 Send heartbeat and receive timeout

In a KNX network, S-m ode and LTE mode communication objects can be exc hanged between individual devices. The Receive timeout defines the period of time within which all the communication objects requested from a device must have been received at least once. If a communication object i s not received within this period, a predefined value is used.

Similarly, the Send heartbeat defines the period of time within which all the commu- nication objects requested must be transmitted at least once.

Fixed times are specified as follows: – Receiv e timeout: 31 minut es

– Send heartbeat: 15 minutes

Individual zones can also be disabled (out of service) via control parameter if they are not being used. In disabl ed zones, the LTE signal will no longer be periodically sent, and will theref ore reduce bus load.

3.10.6 Startup

The application is restarted after every reset, so that all the connected motorized valve actuators are synchronized (see section 3.7).

After a reset, it takes up to 5 minutes for all the connected room thermostats to restart. This is designed to avoid overloading the network when restarting. At the same time, it reduces the load on the KNX network, as not all t hermostats transmit data at the same time. The delay (T

WaitDevice

) is determined by the thermostat's

device address. After the delay, the device starts to send.

3.10.7 Heating demand

In S-mode, the current state signal of the control output (e. heater) is available.

3.10.8 Air demand

In conjunction with Synco, the air demand from each room is transmitted to the BACS to provide the required air volume.

In S-mode, the curr ent state signal of the damper is available.

LTE mode / S-mode

Reducing the bus load

Startup response

Startup delay

KNX

Heating output primary Cooling output primary

KNX

Control output VAV

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3.10.9 Electric heater interlock by supply air controller (LTE mode only)

To avoid overheating of an electric heater, sufficient flow of supply air must be guaranteed. The thermostat features the function “Interlock of el. heater via supply air controller”, which is active when a supply air controller (e.g. Synco RMU7xx) is used in the system. The supply fan controller sends the fan status (StatusSATC) to the thermostat when the supply fan is running, after which the el heater is allowed to turn on if there is a call for heat. When the supply fan is not running, then the el. heater keeps turned off, even though there is a dem and for heat. The fan symbol is displayed, when the supply fan is on.

· El ectric heater enable via local input X1 / X2 or via KNX will override any release

by this interlock function and vise versa (last intervention wins).

· Af ter power-up of the thermostat the electric heater is completely disabled for at

least 5 minutes or until a supply air controller is detected. If no supply fan controller is in the system, the el. heater is allowed to turn on if there is a demand for heat.

· T he fan informati on is broadcast every 15 minutes or on change of value. If no

value is received any more, the thermostat will disable the interlock function after a timeout of 31 minutes.

3.10.10 Primary fan ov errun af ter switching off the electric heater

To avoid overheating of an electric heater after it has been switched off, the air flow must be maintained for a while.

In conjunction with a supply air controller (e.g. Synco RMU7xx) this will be automatically assured by exchanging the necessary information. The supply fan controller wi ll only switch off the supply fan once all el. heaters are cooled off.

Note: The cool off time of the el. heater can be adjusted for each el . heater via parameter "fan overr un time" (P54, factory setting 60sec).

Notes

Caution

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3.10.11 Fault function on KNX

If a fault occurs (e.g. digital fault input, dew point, communication configuration, etc.) then a fault will be sent on the bus.

An RDU thermostat listens on the bus and sends its fault when the fault has the highest alarm priority. This ensures that the management station does not miss any alarms. If alarms occur at the same time, the alarm with the highest priority will be first displayed and sent on the bus.

Fault transmission is different in LTE mode and S-mode:

S-mode LTE mode

Fault state Alarm info (error code + internal information) Fault information (internal information)

Alarm text (default text can be edited with ACS tool)

The table below shows the error code and default alarm texts.

Thermostat Fault information on bus

Prio Fault Display Error code Default fault text

Text adjustable *)

- No fault --- 0 No fault

1 Bus power supply**)

bus

5000 No bus power

supply

---

2 Device add ress error Addr 6001 >1 id device address --3 Condensation 4930 Condensation in the

room

4 External fault input X1 AL1 9001 Fault input 1

5 External fault input X2 AL2 9002 Fault input 2

*) Default alarm texts are stored in the thermostat’s non-volatile memory and can

be adjusted using the ACS commissioning tool

**) Thi s error will not be sent on bus (because there is no bus!)

· Priority order is #1…5

· Ext ernal faults #4…5: If faults are active, the display will show AL1, AL2,

alternating. On the bus, only the fault with the highest priority will be sent

A supervisor alarm system may command the thermostat to stop sending f aults to the bus via the communication object “Fault transmission” (disable / enable). This has no impact on the local display of faults.

After a timeout of 48 hours, the sending of faults will automatically be enabled again.

KNX

Priority of alarms

KNX

Fault transmi ssion

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3.10.12 Emergency control (LTE Mode only)

In case of smoke or fire the damper can be overri dden via KNX. The necessary information is provided by the functi on block “HVAC Emergency Mode”

The table below describes the behavior of the controll er output.

# Datapoint value Damper

0 Normal Normal operation 1 EmergPressure Fully open 2 EmergDepressure Fully closed 3 EmergPurge Fully open 4 EmergShutdown Fully closed 5 EmergFire Fully closed

Emergency signal s have highest priority and command the cont rol output accordingly. Any ongoing function like fan-overrun etc. will be stopped immediately.

The priority is as follows:

1. Smoke (Emergency 1..4)

2. Fire (Emergency 5)

3. Fan overrun (Emergency 0 and el heater fan overrun function is active)

4. Normal operation (Emergency 0 and operation by operating mode button)

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3.11 Communication objects (S-mode)

3.11.1 Overview

Page Object # and name Thermostat Object # and name Page

12 1 System time 12 3 Time of day 12 38 Outside temperature 21 Room temperature 12 14 12 Room operating mode:

Time switch

16 Room operating mode:

State

14 7 Room operating mode:

Preselection

24 Room temperature:

Current setpoint

13, 15,3420 Room operating mode:

Window state

32/33 X1 (temperature / digital) 35

20 22 Room temperature:

Comfort basic setpoint

34/35 X2 (temperature / digital) 35

20 23 Room temperature:

Comfort setpoint

25 Control output VAV 40

26 31 Application mode

26 Heating output primary

40 34 20 Enable electric heater 23, 34 30 Supply air temperature 42 6 Fault transmission 5 Fault state 24, 42

4 Fault information 24, 35,

Input communi catio n object Output communication object Input & output communication object

1) 8-bit and 1-bit object availa ble, selectable via paramet er in ETS

2) Availability depending on selected application / function

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3.11.2 Description of communication objects

Obj Object name Function Type/ length Flags

1 System time Time and

date

19.001 8 Byte

CWU

System time for display on the room t hermostat. See par ameter P07 (3 or 4)

3 Time of day Time and

date

10.001 3 Byte

CWU

Another object for receiving the time of da y for display on the room thermostat. See parameter P 07 (3 or 4)

4 Fault information Alarm

Info

219.001 6 Byte

Common alarm output. If an alarm occurs, the alarm n umber is transmitted

5 Fault state Faulty /

normal

1.005 1 bit

Common alarm output. If an al arm occurs, the alar m f lag is set 6 Fault

transmi ssion

Enable / disable

1.003 1 bit

CWU

A supervisor alarm system can disable th e broadcasting of alarms by the devices. This has no impact on the local display of alarms. After a tim eout of 48 hours, the sending of faults will automatically be enabled again.

7 Room operating

mode: Preselection

Auto Comfort PreComf. Economy Protection

20.102 1 Byte

CWTU

Controls the room operating mode selecti on of the thermostat vi a bus. The comm and can also be submitted as four 1-bit communication objects (8...11). The last interaction wins – either from local operating mode button or via b us. Note: The thermostat will transform Precomfort either into Economy or Comfort (selectable via P88).

8 9 10 11

Operating mode: Preselection Auto Comf Eco Prot

Trigger 1.017

1 bit

Switch room operat ing mode to ei ther Auto, Comf ort , Economy or Protection. The last interact ion wins – either from the local operating mode button or via bus.

12 Room operating

mode: Time switch

Comfort Economy PreComf. Protection

20.102 1 Byte

CWU

This inf or mation is provided by a c entral time switch or a supervisor and defines the actual HVAC operating mode. The comm and can also be submitted via three 1-bit communication obj ects ( 13...15). Protection has the highest priority and cannot be overridden. Note: The thermostat will transform Precomfort either into Economy or Comfort (selectable P88).

13 14 15

Time switch Comfort Economy Protection

Trigger 1.017

1 bit

Switch the HVAC mode to either Comfort, Ec onomy or Pr otection mode.

Obj Object name Function Type/ length Flags 16 Room operating

mode: State

Comfort Economy Protection

20.102 1 Byte

CRT

Effective room oper ating mode used by the thermostat (considering time switch, user selection, window contact, etc.) This state information is available via one 8-b it enumerati on or three 1bit communication objects (17...19). Note: The thermostat does not support Precomf ort.

17 18 19

Room operating mode: State Comfort State Economy State Protection

ON OFF

1.002 1 bit

Corres ponding communication object sends "True" 20 Window state Open

Closed

1.019 1 bit

CWU

The thermostat is set to Econom y mode if value “1” (open) is received. It switches back to the previous mod e when the valu e is “0” (closed). "Window state" is sent e.g by a KNX switc h or a KNX pr esence detect or. It has the same effect as th e local operating mod e switchover contact X1, X2 (param eter P38, P40).

Only one input source must be used, either local input X 1/X2 or KNX bus.

21 Room temperature Temp.

value

9.001 2 Bytes

CRT

The valu e of the room t em peratur e measured vi a b uilt-in or extern al sensor is available vi a this communication object.

22 Room tempera

ture:

Comfort basic setpoint

Temp. value

9.001 2 Bytes

CWU

If function "Temporary setpoint" is enabled via parameter P69, then after an operating mode chang e, the setpoint adjustments mad e by the user and via comm unication object 23 wil l be dismissed and the thermostat will be reset to the Comfort bas ic setpoint. Note: Setp oints that have been changed via the local HMI may be overwri tten durin g a system startup from a central master controller, e.g.RMB795.

The Comfort basic setpoint is stored in EEPRO M (see section

3.3.2).

The service life of the EEPROM depends on the number

of write cycles. Never write this communication object cyclically!

Room temperature:

Comfort setpoint

Temp. value

9.001 2 Bytes

CWTU

Communication object used to shift the setp oint used by the thermostat (see section 3.3.2). Same priority as local setpoint shift on the thermostat. The last intervention wins. Note: The Comfort basic setpoint (object 22) will not be changed.

Room temperature:

Current setpoint

Temp. value

9.001 2 Bytes

CRT

Current setpoint, including shift, compensation, etc., used by the thermostat for temperature control

25 Control output

VAV

0…100% 5.001

8 bit

CRT

Indicates the position of the air dam per. E.g. single duct 26 Heating output

primary

0…100% 5.001

8 bit

CRT

Indicates the position of the heating actuator of the auxiliary heating. E.g. single duct with electric heater application : Output of the electric h eat er.

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Obj Object name Function Type/ length Flags 28 Enable electric

heater

Enable / disable

1.003 1 bit

CWU

An elect ric heater can be disabled with this communic ation obj ect (e.g. to meet tariff r egulations). The same function is also available via local multifunctional inp ut X1/X2 (parameter P38, P40).

Only one input source must be used, either local input X1/X2or KNX bus.

30 Supply air

temperature

Temp. value

9.001 2 Byte

CWU

The suppl y air temperature sent by the supply air c ontroller indicat es whether cold or hot air is supplied (for VAV changeover). The controller d etermines the necess ity to open or close th e air damper according to the supply air temperature, the room temperature setpoint, and the current room temperature. The same function is also available via local multifunctional inp ut X1/ D1 (parameter P38, P42).

Only one input source must be used, either local input X1/X2/D 1or KNX bus.

31 Application mode HVAC

control mode

20.105 8 bit

CWU

0 Auto (default) Heat ing and/or cooling 1 Heat Heating only 2 Morning warmup* Heating on l y 3 Cool Cooling only 4 Night purge Open damper fully 5 Precool* C oolin g only 6 OFF Neither heating nor cooling 8 Emergency heat* Heating only 9 Fan only Open damper fully (= night purge)

* Funct ion handled like Heat (1) or Cool (3 )

Obj Object name Function Type/ length Flags

3234X1: Temperature

X2: Temperature

Temp. value

9.001 2 Byte

CRT

Indic ates the valu es of the t emperature sensors connect ed to the local inputs X1 / X2

3335X1: Digital

X2: Digital

ON OFF

1.001 1 bit

CRT

Indic ates the status of the digital inputs (adjusted by parameters P39/P41) inc luding c ons idering of operating action

38 Outside

temper ature

Temp. value

9.001 2 Byte

CWU

The outside temperature m easured by a KNX sensor can be displayed on the thermostat, if parameter P07 "Additional user informat ion” is set = 2 (outside temperature).

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3.12 Control parameters

A number of control parameters can be readjusted to optimize control performance. This can be done on the thermostat via HMI or via commissioning / operating tool. These parameters can also be set duri ng operation without opening the unit. In the event of a power failure, all control parameter settings are retained.

The control parameters are assigned to 2 levels:

· “Service l evel”, and

· “Expert level” including communications, diagnostics and test

The “Service lev el” contains a small set of parameters to set up the thermostat for the HVAC system and to adjust the user interface. These parameters can be adjusted any time. Change parameters at the “Expert level” carefully, as they impact the thermostat’s control performance and functionality.

3.12.1 Parameter setting via local HMI

1. Press buttons + and – simultaneously for 3 seconds. Release and press button + again for 3 seconds within 2 seconds. The display shows “P01”. Continue with step 2.

1. Press buttons + and – simultaneously for 3 seconds. Release and press button – again for 3 seconds within 2 seconds. The display shows “P01” and "service".

2. Repeat edly press the + or – button to select the required parameter.

P01

P02 P08 P14

+- +

- -

3171z99

End

P13

3. Press + and – simultaneously. The current value of the selected parameter begins to flash, allowing you to change the value by repeatedly pressing + or –.

4. The next parameter is displayed when you press + and – again simultaneously.

5. Repeat steps 2 to 4 to display and change additional parameters.

6. Press + or – until “End” is displayed, and then press + and – simultaneously to save the change and exit parameter entry mode.

The factory setting for the control parameters can be reloaded via parameter P71, by changing the value to “ON”, and confirming by pressing buttons + and – simultaneously. The display shows “8888” during reload.

Enter only “Service” level

Enter “Service” and “Expert” level

Adjust parameters

Reset parameters

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3.12.2 Parameter setting / download via tool

Control parameters can be adjusted via bus either by parameter download during commissioning or during normal operation with a tool like ACS.

With the ACS tool, the parameters can be changed… – during commissioning via parameter download (all parameters)

– during normal operation via Popcard (most of the parameters)

Most parameters can be changed during normal operation using the OZW772 web server or the RMZ792-B bus operator unit.

Only the parameters for device address can be downloaded via ETS3 Professional. This is to simplify and avoid a conflict. It allows you to further engineer communication objects of an RDU prev iously commissioned vial local HMI or ACS (assigning communication objects to group addresses).

· The basic application can only be changed via parameter download with ACS.

· The RDU KNX thermostats require version ETS3f or higher / ACS version 5.11

or higher.

Connecting a KNX commissioning / operating tool to the RDU is described in section 4.2.

ACS

OZW772 Web server, RMZ792-B

bus oper a tor

unit

ETS

Notes:

Connecting a KNX tool

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3.12.3 Parameters of the "Service level"

Parameter

Name Factory setting Range

Service level

P01 Control sequence 1 0 = Heating only

1 = Cooling only 2 = H/C changeover manual 3 = H/C changeover auto

P02 Operation via room op selector 1 1 = Auto - Protection

2 = Auto - Comfort - Economy -

Protection

P04 Unit 0 0 = °C

1 = °F P05 Measured value correction 0 K – 3 ... 3 K P06 Standard display 0 0 = Room temperature

1 = Setpoint P07 Additional display information 0 0 = --- (No display)

1 = °C and °F

2 = Outside temperature (via bus)

3 = Time of day (12h) (via bus)

4 = Time of day (24h) (via bus) P08 Comfort basic setpoint 21 °C 5 ... 40 °C P09 Comfort setpoint minimum 5 °C 5 ... 40 °C P10 Comfort setpoint maximum 35 °C 5 ... 40 °C P11 Economy heating setpoint 15 °C OFF, 5 ... WCoolEco;

WCoolEco = 40 °C max P12 Economy cooling setpoint 30 °C OFF, WHeatEco ... 40 °C;

WHeatEco = 5C min P14 Button lock 0 0 = Unlocked

1 = Auto l ock

2 = Manual lock

Parameter display depends on selected application and function.

Note:

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3.12.4 Parameters of the "Expert level with diagnostics and test"

Parameter

Name Factory setting Range

Expert level

P30 Heat P-band Xp / switching diff 2 K 0.5 … 6 K P31 Cool P-band Xp / switching diff 1 K 0.5 … 6 K P33 Dead zone Comfort mode 2 K 0.5 … 5 K P35 Integral action time Tn 5 min 0…10 min P36 H/C ch'over swi point cooling 16 °C 10…25 °C P37 H/C ch'over swi point heating 28 °C 27…40 °C P38 Input X1 3 = Op m ode contact 0 = --- (no function)

1 = Room temp ext. s ensor / Return air temp (AI) 2 = H/C changeover (AI/DI) 3 = Operating mode contact (DI) 4 = Dew point sensor (DI) 5 = Enabl e electric heater (DI) 6 = Fault input (DI) 7 = Monitor input (Digital) 8 = Monitor input (Temp) 9 = Supply air sensor (AI) 10 = Presence detec tor (DI)

P39 Normal position input X1 0 (N.O.) 0 = Normally open / Open

1 = Normally closed / Close

P40 Input X2 1 = Ext. sensor 0 = --- (no function)

P41 Normal position input X2 0 (N.O.) 0 = Normally open / Open

1 = Normally closed / Close P63 Supply air limit value min 0% 0…P64 (%) P64 Supply air limit value max 100% P63...100 (%) P65 Protection heating setpoint 8 °C O FF, 5…WCoolPr ot;

WCoolPr ot = 40 °C m ax P66 Protection cooling setpoint OFF OFF, WHeatProt… 40;

WHeatProt = 5°C mi n P68 Temporary Comfort mode 0 (= OFF) 0...360 mi n 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

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Parameter

Name Factory setting Range

Communications

P81 Device address

255 1…255 P82 Geographical zone (apartment)2) --- ---, 1...126 P83 Geographical zone (room)

1 ---, 1...63 P87 Air distribution zone --- ---, 1...31 P88 Transformation Precomfort 0 0 = Economy

1 = Comfort

Ph ysical address = Area.L ine.Devic eAddr ess. Factory setting for Area = 0, Line = 2.

Can be changed by special management service e.g. from line c oupler or via ACS commissioning tool.

Type = geographic al zone A.R.S. In RDG RDU sub zone = f ixed valu e 1

Parameter

Name Range

Diagnostics & test

d01 Applic ati on nu m b er NONE = (No application)

Sd = Single duct SdEL = Single duct wit h electric heater

d02 X1 state 0 = Not activated (for DI)

1 = Activat ed (DI) 0…49 °C = Cu rrent temp. value (f or AI) 00

= H/C Input shorted

100

= H/C Input open

d03 X2 state 0 = Not activated (for DI)

1 = Activat ed (DI) 0…49 °C = Cu rrent temp. value (f or AI) 00

= H/C Input shorted

100 = H/C Input open

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4. Handling

4.1 Mounting and installation

Mount the room thermostat on a recessed square conduit box with 60.3 mm fixed centers. Do not mount on a wall in niches or bookshelves, behind curtains, above or near heat sources, or exposed to direct solar radiation. Mount about 1.5 m above the floor.

Mounting

· Mount t he room thermostat in a clean, dry indoor place without direct airflow from a heating / cooling device, and not exposed to dripping or splash water

· In case of limited space in the conduit box, use mounting bracket ARG70.3 to increase the headroom by 10 mm

Wiring

See Mounting Instructions M3172 [3] enclosed with the thermostat.

· Com ply with local regulations to wire, protect and earth the controller.

Warning! No internal line protection for supply lines to external consumers (Y10, Y21)

Risk of fire and injury due to short-circuits!

· Adapt the line diameters as per local regulations to the rated value of the installed ov ercurr ent protection device.

· The AC 230 V mains cable and the AC 24 V supply line must have an external circuit breaker with a rated current of no more than 10 A. For US installations use Class 2 rated power supplies.

· Isol ate the cables of SELV inputs X1-M/X2-M for 230 V if the conduit box carries AC 230 V mains voltage.

· Input s X1-M or X2-M of different units (e.g. summer/winter switch) may be connected in parallel with an external switch. Consider overall maximum contact sensing current for switch rati ng.

· Isol ate the cables of KNX communication input CE+ / CE- for 230 V if the conduit box carries AC 230 V mains voltage.

· Disconnect from supply before opening the cover.

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4.2 Commissioning

The room thermostats are delivered with a fixed set of applications. Select and activate the relevant applicati on during commissioning using one of the

following tool s: – Local DIP switch and HMI

– Synco ACS – ETS

Set the DIP switches before snapping the front panel to the mounting plate, if you want to select an application via DIP switches.

All DIP switches need to be set to “OFF” (remote configuration), if you want to select an application via commissioning tool.

After power is appli ed, the thermostat resets and all LCD segments flash, indicating that the reset was correct. After the reset, which takes about 3 seconds, the thermostat is ready f or commissioning by qualified HVAC staff.

If all DIP switches are OFF, the display reads "NONE" to indicate that appli cation commissioning via a tool is required.

Each time the application is changed, the thermostat reloads the factory setting for all control parameters, except for KNX device and zone addresses!

Connect the Synco ACS or ETS tools to the KNX bus cable at any point for commissioning:

3172A04

KNX

ETS

RS232

Siemens N148 UP146 UP152

ETS/ACS

Siemens OCI700 OCI702

G0 Y21 Y10 G0

X1 M X2

CE+ CE-

ACS and ETS require an interface: – RS232 KNX interface (e.g. Siemens N148 / UP146 / UP152)

– OCI700, OCI702 interface

An external KNX bus power supply is required if an RDU is connected directly to a tool (ACS or ETS) via KNX interface.

Applications

DIP switches

Note:

Connect tool

Note:

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The thermostat's control parameters can be set to ensure optimum perf ormance of the entire system. The parameters can be adjusted using – Local HMI – Synco ACS – ETS

The control parameters of the thermostat can be set to ensure optimum performance of the entire system (see section 3.12).

· The control sequence may need to be set via parameter P01 depending on the application. The factory setting is as follows:

Application Factory setting P01

Single duct 1 = cooling only Single duct wit h el. heater Not adjustable

· Recal ibrat e the temperature sensor if the room temperature displayed on the thermostat does not match the room temperature measured (after min. 1 hour of operation). To do this, change parameter P05

· W e recommend to review the setpoints and setpoint ranges (parameters P08…P12) and change them as needed to achieve maximum comfort and save energy

The programming mode helps identify the thermostat in the KNX network during commissioning.

Press buttons “operating mode”

and “+” simultaneously for 6 sec to activate

programming mode, which is indicated on the display with "PrOg". Programming mode remains active until thermostat identification is complete.

Use ETS to assign the KNX group addresses of the thermostat's communication objects.

Each device has a unique KNX serial number inside the front panel. An additional sticker with the same KNX serial number is enclosed in the packaging box. This sticker is intended for installers for documentation purposes.

Control parameters

Control sequence

Calibrat e sensor

Setpoint and range limitation

Programming mode

Ass ign KNX grou p addresses

KNX serial number

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4.3 Operation

See also Operating I nstructions B3172 [2] enclosed with the thermostat.

Layout

1 Operating mode selector / Protection

2 Adjust setpoint and control parameters

User action Effect, description

Normal operation Actual operating mode and state are

indicated by symbols Press any button (thermostat in norm al operation)

Backlit LCD turns on and… (see bel ow for

further acti on)

After the last operation and a timeout of 20

seconds, the LCD backlight turns off Press left button Change operating mode Press left button ( P01 = 2) Toggle between heating and cooling Press left button while "Operating mode" via bus is Economy

Activate "Extend Comfort mode"

(for details, see page 16) Press left button >5 seconds Activate / deactivate button lock Press + or – Adjusts the Comfort room t em perature

setpoint .

Thermostat changes to Comfort mode Press + and – >3 seconds, release, then press + agai n >3 seconds

Go to parameter setting mode “Service

level” Press + and – >3 seconds, release, then press – again >3 seconds

Go to parameter setting mode “Expert

level”, diagnosti cs and test Press operating m ode button and “+” simultaneously for 6 seconds

Enter (KNX) programming mode

Button ope r a tion

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3 Heating/cooling mode

Cooling Heating,

Electric heater active

4 Additional user information, like outdoor

temperature

or time of day from

KNX bus

1 Operating mode

Protection Comfort

Economy

Auto T imer according to schedule

(via KNX)

2 Displays room temperature, setpoints

and control parameters.

Symbol indicates the current room

temperature

5 Indicates fault or reminder 6

Condensation i n room (dew point sensor active)

7 Temporary comfort prolong activ e 8

Primary fan is active (only sup-

ported with Synco700 primary controller)

Button lock active

Weekday 1…7 from KNX bus (1 = Monday / 7 = Sunday)

4.4 Remote operation

The RDG thermostats can be operated from a remote location using a OZW772 / OZW775 web server, a RMZ792-B bus operating unit or the ACS Operating tool.

4.5 Disposal

The devices are consi dered electronics devices for disposal in terms of European Directive 2012/19/EU and may not be disposed of as domestic waste.

· Dispose of the device via t he channels provided for this purpose.

· Comply with all l ocal and currently applicable laws and regulations.

Display

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5. Supported KNX tools

5.1 ETS

ETS is an engineering tool. It is used to set up the communication of the RDU KNX thermostat and assigns the communication object to group addresse s (S-mode).

Parameters are only used for choosing (making visible / hiding) the communication objects.

This Manual does not describe how to operat e ETS and commission a device. Refer to the KNX Manual for more details.

Setting RDU KNX parameters is only supported by ETS3f or higher.

5.1.1 Parameter settings in ETS

For setting the paramet ers, open the project and select a devi ce. To start the parameter settings, select Edit, then Edit parameters.

· Param eters are only used to choose the communication objects

· The tool required is ETS version 3f or higher!

5.2 ACS tool

With the ACS tools, the RDU KNX thermostats can be commissioned (physical address, application, parameters). They can be operated or monitored via bus during normal operat ion.

This Manual does not descri be how the physical address is defined. Also, it only gives a brief overview of the main functionality of ACS. For more information, refer to the ACS online help.

Setting RDU KNX parameters is only supported by ACS Version 5.11 or higher.

ETS

STOP

Note!

Notes:

ACS

STOP

Note!

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5.2.1 Parameter settings in ACS

In the ACS program, sel ect Plant, then Open to open the plant. To start the parameter settings, select Applications, t hen Plant engineering…::

The application and control parameters can be adjusted and downloaded. Column Line no. contains the parameter number as shown in the parameter table. Refer to section 3.12.

Some parameters have a different range in ACS than in the room thermostats. The thermostat does not accept changes that are outside its range. This can be observed online by the fact that a changed value jumps back to the original value. To be sure, use the ranges described in the parameter tables in section 3.12.

STOP

Note!

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5.2.2 Operation and monitoring with ACS

In the ACS program, sel ect Plant, then Open to open the plant. To start monitoring and operation, select Applications,then Plant operation.

ACS supports parameter settings even duri ng norm al operation. To change a control parameter, select Popcard, then Settings.

· Make sure you have logged on with sufficient access right

· Only control parameter can be changed, no application!

ACS Operating

Parameter settings i n ACS

Notes:

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ACS offers plant diagrams for easy monitoring and operation of the thermostat. To start this application, select Applications, then Pant diagram

ACS provides standard plant diagrams for RDU KNX thermostats, which depend on the configuration as follows:

Plant type

Application

Single duct

Single duct wit h electri c heater

Plant dia gram in ACS

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5.2.3 Operation and monitoring with OZW772

OZW772..

KNX TP1

Ethernet

USB Router

Internet / Intranet

57 01 Z01a

Ethernet

Web browser

The OZW772 web server enables users to operate a Synco HVAC system from a remote location – via PC or from a smart phone via the web. A start page shows the most important data points. A combination of menu / path navigation enables users to access all data points quickly and straightforwardly. The entire installation can be visualized in the form of plant diagrams. Alarm and state messages can be forwarded to differ ent message receivers, such as e-mail, SMS, etc.

For details, see Commissioning Instructions CE1C5701.

5.2.4 Operation and monitoring with RMZ972-B

The RMZ792-B is a communicating operator unit designed for operating Synco™ 700 and RDU KNX devices in a KNX network. The operator unit is suited both for fixed installation and mobile use (e.g. for use by the service engineer) . Third-party devices cannot be operated with it.

For details, see Basic Documentation CE1P3113.

The application cannot be displayed in the f orm of t ext, instead a number is used: (Parameter Plant type on menu Basic setting):

0 = no application 1 = single duct 2 = single duct and electric heater

Note:

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6. Connection

6.1 Connection terminals

G X1M

Y10 G0

SELV

3172A21

CE+ CE

L Y21

G, G0 Operating voltage SELV AC 24 V L Supply for electric heater AC 230 V Y10, G0 Output for damper, VAV compact controller Y21 Output for electric heater X1, X2 Multifunctional input for temperature sensor

(e.g. QAH11.1) or potential-free switch Factory setting: – X1 = Operating mode switchover contact – X2 = External sensor

(function can be sel ected via parameter P38 / P40). M Measuring neutral for sensor and swit ch CE+ KNX data + CE- KNX data -

6.2 Connection diagrams

10 A

N1 Room thermostat RDU341 Y1 Damper actuator, VAV c om pact control ler E1 Electri c heater S1, S2 Switch (keycard, window contact, etc. ) B1, B2 Temperature sensor (return air

temperature, external room temperature,

changeover sensor, etc.) CE+ KNX data + CE- KNX data -

For US installations, use Class 2 rated power supplies.

For other installations, use circuit breakers with rated current of no more than 10 A.

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7. Mechanical design

7.1 General

The thermostats consist of 2 parts:

· Front panel with electronics, operating elements and built-in room temperature sensor

· Mounting base wit h power electronics

The rear of the mounti ng base carries the screw terminals. The base fits on a square conduit box with 60.3 mm fixed centers. Slide the front panel in the mounting base and snap on.

1 Operating mode selector / Protection 2 Adjust setpoint and control parameters

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7.2 Dimensions

Dimensions in mm

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8. Technical data

Power supply

Operating voltage

DC 24 V: connect G to + and G0 to -

SELV AC 24 V / DC 24 V or

AC 24 V / DC 24 V class 2 (US) Rated voltage AC 24 V Frequency 50/60 Hz Power consumption Max. 2.5 VA / 0.9 W External supply line protection (EU)

Circuit breaker max. 10 A

Characteristic B, C, D

according to EN 60898

Power source with current

limitation of max. 10 A

No internal fuse.

External preliminary protection with max. C 10 A circuit breaker in the supply line requi red under all circumstances.

Outputs Control output Y21-N (N.O.)

Rating

AC 230 V

Max. 5(2) A Control output Y10-G0

Resolution Current

SELV DC 0…10 V

39 mV

Max. ±1 mA

Inputs Multifunctional input X1-M/X2-M

Temperature sensor input:

Type

Digital input:

Operating action Contact sensing Insulation against mains voltage (SELV)

QAH11.1 (NTC)

Selecta b le (N.O./N .C .) SELV DC 0...5 V/max 5 mA 4 kV, reinforced insulation

Function input:

External temperature sensor, heating/cooling changeover sensor, operating mode switchover contact, dew point monitor contact, enable el ectric heater contact, fault contact, monitor input

Selectable

X1: P38 X2: P40

KNX bus Interface type KNX, TP1-64

(electrically isolated) Bus current 20 mA Bus topology: See KNX manual (see section 1.2)

Operational data Switching diff erential, adjustable

Heating mode (P30) Cooling mode (P31)

2 K (0.5...6K)

1 K (0.5...6K) Setpoint setti ng and range

Comfort (P08)

Economy (P11-P12)

Protection (P65-P66)

21°C (5...40 °C)

15°C/30°C (OFF, 5...40 °C)

8°C/OFF (OFF, 5...40 °C) Multifunctional input X1/X2

Input X1 default value (P38)

Input X2 default value (P40)

Selectable 0...8

3 (Operating mode

switchover)

1 (External tem perature sensor)

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Built-in room tem perature sensor

Measuring range Accuracy at 25 °C Temperature calibrati on range

0…49 °C < ± 0.5 K ± 3.0 K

Settings and display r esol ution

Setpoints Current temperature value displayed

0.5 °C

Environmental conditions Operation

Climatic conditions Temperature Humidity

As per IEC 60721-3-3 Class 3K5

0...+50 °C <95 % r.h.

Transport

Climatic conditions Temperature Humidity Mechanical condit ions

As per IEC 60721-3-2 Class 2K3

-25...+60 °C <95 % r.h. Class 2M2

Storage

Climatic conditions Temperature Humidity

As per IEC 60721-3-1 Class 1K3

-25...+60 °C <95 % r.h.

Standards and directives EU Conformity (CE) CE1T3171xx

RCM conformity

CE1T3171en_C1

Electronic cont rol type

2.B (micro-disconnection on

operation) Safety class II as per EN 60730 Pollution class Normal Degree of protecti on of housing IP 30 as per EN 60529

General Connection terminal s Solid wires or prepared

stranded wires

1 x 0.4…2.5 mm

or 2 x 0.4…1.5 mm

Housing front color RAL 9003 white Weight without / with packaging 0.163 kg / 0.233 kg

The documents can be downloaded from http://siemens.com/bt/download

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Index

Air demand ......................................................... 40

Air heating / coo ling cha ng eover ......................... 23

Applica tion s overview ......................................... 22

Auto Ti mer mode ................................................ 15

Automat ic heat ing / cooling chan geo ver .............. 23

Button lock .......................................................... 24

Chang eover switch ............................................. 23

Control output VA V .............................................. 40

Control outpu ts co n figura tion ............................... 33

Control outputs overview ..................................... 33

Control para meters ............................................. 47

Control sequence s .............................................. 25

Cooling de mand .................................................. 40

DC 0..10 V control signal .................................. 3 3

Dew point mon itoring .................................... 2 4 , 34

Disposa l.............................................................. 56

Effect of Protect ion via time schedu le .................. 1 5

Electric heater ..................................................... 30

Enable / disa b le elec tr ic hea te r ........................... 34

Enable/d isa ble electr ic heate r ............................. 30

Expert level para mete rs ...................................... 4 7

Extens ion of Comfort mode ................................. 16

Externa l / return air temperatu re .......................... 34

Externa l / return a ir tempe ra ture s en s o r .............. 24

Fault ................................................................... 35

Fault on KNX ...................................................... 42

Fault, handling .................................................... 36

Heating / cooling changeo ver .............................. 3 4

Heating deman d ................................................. 40

Integra l action time .............................................. 12

Monitor ing with ACS ............................................ 59

Mounting and installat ion .................................... 52

Multifunc tiona l input s .......................................... 34

ON/OFF control output signals............................ 33

Operating mode

Priority inte rvention ......................................... 14

Operating mo de button ....................................... 15

Operating m od e switcho ver ................................ 34

Operation w ith AC S ............................................ 59

Parame ter setting ............................................... 47

Parame ter setting s in ACS .................................. 59

Plant diagra ms in ACS ........................................ 60

Precomfo rt ......................................................... 15

Proportion al ban d ............................................... 12

Protect ion mode / Sta ndb y .................................. 13

Remote hea ting / cool ing cha n ge o ver ................ 23

Rese t parameters ............................................... 47

Sens or input ....................................................... 34

Setpoint Co mfort mode ....................................... 32

Setpoint Econo my mode ..................................... 32

Setpoint li mitat ion ............................................... 19

Setpoint P rotection mode ................................... 32

Setpoints and sequences.................................... 32

St and by / Protection mod e .................................. 13

Supply a ir temperatu re ....................................... 23

Switching dif ferentia l ........................................... 12

Temperature out of range ................................... 36

T e mporary se tpoint ............................................. 19

Time sch ed ule cha ng e mode .............................. 15

V A V change over ................................................. 23

V AV change o ver via bus ..................................... 25

Window conta ct ................................................. 15

Window state ........................................... 1 3, 14, 34

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Building Technologies 2015-06-0 8

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www.buildingtechnologies.s iemens.com

Siemens Switzerland Ltd

Subject to change

Siemens RDU341 Basic Documentation

Specifications and Main Features

Frequently Asked Questions

User Manual