Siemens RDU340 Basic Documentation

Flush-mounted room temperature controllers for VAV / CAV applications, with LCD

RDU340

Basic Documentation

Edition: 3.0

CE1P3078en

2014-11-03

Building Technologies

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Building Technologies 2014-11-03

Table of contents

1 About this document ........................................................................... 4

1.1 Revision history ..................................................................................... 4

1.2 Reference documents ............................................................................ 4

1.3 Before you start ..................................................................................... 4

1.3.1 Copyright ............................................................................................... 4

1.3.2 Quality assuran ce .................................................................................. 4

2 Summary .............................................................................................. 5

2.1 Brief descript ion ..................................................................................... 5

2.2 Features ................................................................................................ 5

2.3 Typ e summa ry ....................................................................................... 5

2.4 Equipment combinations ........................................................................ 6

2.5 Accessories ........................................................................................... 7

2.6 Ordering ................................................................................................ 7

3 Use ....................................................................................................... 7

4 Functions ............................................................................................. 8

4.1 T emperature control ............................................................................... 8

4.2 Operating modes ................................................................................... 9

4.3 Setpoint s ............................................................................................. 1 0

4.4 Applications ......................................................................................... 1 1

4.5 Addition al featu res ............................................................................... 12

4.6 Contro l sequen ces ............................................................................... 14

4.6.1 Single duct ........................................................................................... 14

4.6.2 Single duct with electr ical heater .......................................................... 16

4.7 Contro l output ...................................................................................... 17

4.8 Multifunc tional input ............................................................................. 1 8

4.9 Error handl ing ...................................................................................... 19

4.10 DIP switches ........................................................................................ 19

4.11 Contro l para meters .............................................................................. 2 0

5 Handling ............................................................................................. 23

5.1 Mounting and inst allation ..................................................................... 23

5.2 Operating Instructions .......................................................................... 24

5.3 Dispo sal .............................................................................................. 24

6 Engineering ........................................................................................ 25

6.1 Conne ction terminals ........................................................................... 25

6.2 Conne ction diagra ms ........................................................................... 25

7 Mechanic al desi gn ............................................................................. 26

7.1 Dimensions .......................................................................................... 27

8 Tec hnical data .................................................................................... 28

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Siemens RDU340… Basic Documentation CE1P3076.en Building Technologies Table of contents 2014-11-03

1 About this document

1.1 Revision history

Edition Date Changes Section Pages

3.0 2014-10-21 Update for RoHS 2.0 and overcurrent protection and other minor changes

2.0 2014-09-04 Update P51 Mounting and wiring information Date format changed in line with ISO 8601 specif ications (yyyy-mmdd format).

1.0 2008-07-11 First edition

5.1

5.3

6.2 8

1.2 Reference documents

Ref. Document title Type of document Document No.

N3078 Flush-mounted room temperature

controllers with LCD

B3076 Operating Instructions CE1B3076en M3078 Mounting Instructions CE1M3078xx

Datasheet CE1N3078en

23 24 25 28

1.3 Before you start

1.3.1 Copyright

This document may be duplicated and distributed only with the express permission of Siemens, and may be passed only to authorized persons or companies with the required technic al knowledge.

1.3.2 Quality assurance

These documents have been prepared with great care.

· The contents of all documents are checked at regul ar intervals.

· Any corrections necessary are included in subseque nt versions.

· Documents are automatically amended as a consequence of modifications and

corrections to the products described. Please ensure that you are aware of the latest revision date of the documentation. If you find any lack of clarity while using this document, or if you have any criticisms or suggestions, please contact the product manager in your nearest branch office, or write directly to the support team at Headquarters in Zug (see below).

Support address:

Siemens Switzerl and Ltd. Building Technologies Group International Headquarters Field Support 5500 Gubelstrasse 22 6301 Zug, Switzerl and Tel. +41 41 724 5500 Fax. +41 41 724 5501 E-mail: fieldsupport-zug.ch.sbt@siemens.com

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Building Technologies About this docu ment 2014-11-03

2 Summary

2.1 Brief description

The devices support VAV heati ng and cooli ng systems:

· Modulating PI / P control

· Control depending on the room or the return air temperature

· Output for a DC 0…10 V actuator and AC 230V electrical heater (ON-OFF)

· Automatic or manual heating/cooling changeover

· Operating modes: Comfort, Energy Saving and Protection

· Two multifunction al inputs for keycard contact, external sensor, etc.

· Adjustable commissioning and control parameters

· Minimum and maximum setpoint limitation

· Adjustable minimum and maximum limitation of output signal DC 0..10V

· Output signal inversion as an option

· Mounting on recessed rectangular conduit box, 60.3 mm fixing centers

· AC 24 V operating voltage

2.2 Features

· Maintain room temperature via built-in t emperature sensor external room temperature / return air temperature sensor

· Automatic or manual changeover between heating and cooli ng mode

· Sel ect appli cations v ia DI P switches

· Select operating mode via the operating m ode button on the controller

· Display current room temperature or setpoint in °C and/or °F

· Mi nimum and maximum setpoint limit ation

· Key lock (automatic and m anual)

· Two m ultifuncti onal inputs, f reely selectable for:

– Operating mode swi tchov er contact (key car d) – Aut omatic heating/cooling changeov er sensor – External room temperature or ret urn air temperature – Dewpoint sensor – Electri c heater enabl e – Alarm input

· Minimum and maximum limitation of air fl ow signal DC 0..10V

· Fl oor heating temperature limit

· Reload factory settings for commi ssioning and control parameters

2.3 Type summary

Control output

Product number

RDU340 AC 24 V

Siemens RDU340… Basic Documentation CE1P3078en Building Technologies Summary 2014-11-03

Operating Voltage

3 pt on/off DC 0..10 V

ü ü white

LCD

Backl ig ht

Infrared

receiv er

Housing

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Colour r

DC 0..10 V actuators

2.4 Equipment combinations

Type of unit Product number Data sheet

Cable temperat ure sensor or changeover sensor, cable length 2.5 m NTC (3 kW at 25 °C) Room temperature sensor NTC (3 kW at 25 °C) Electrical actuator, DC 0..10V (for radiator valve) Electrical actuator, DC 0...10 V (for 2- and 3-port valves / V…P45) Electrical actuator, DC 0..10V (for small valve 2,5 mm) Electrical actuator, DC 0..10V (for small valves 5.5 mm) Electrical actuator, DC 0...10 V (for CombiValves VPI45) Electromotori c actuator, DC 0..10V (for valves 5.5 mm) Electrothermal actuator, AC 24 V, NC, DC 0…10 V, 2 m (for radiator valves and small valve

2.5 mm) Electrothermal actuator, AC 24 V, NO, DC 0…10 V, 2 m (for radiator valves and small valve

2.5 mm)

QAH11.1

QAA32

SSA61...

SSC61…

SSP61…

SSB61...

SSD61...

SQS65…

STA 63

STP63

1840

1747

4893

4895

4864

4891

4861

4573

4884

GQD161…

GDB161…

GLB161…

GMA161…

DC 0…10 V damper actuator

GEB161…

GCA161…

GBB161…

GDB181.1E/3

VAV compact controller

GLB181.1E/3

*) The docum ent s can be downloaded fr om http://siemens.com/bt/download.

4605

4634

4614

4621

4613

4626

GIB161…

3544

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2.5 Accessories

Designation Product no. Data Sheet

Changeover mounting kit (50 pcs/package) Plastic mounting spacer for flush mounted thermostats for increasi ng the headroom in the conduit box by 10 mm

Conduit box for flush mounted thermostat

*) The docum ent s can be downloaded fr om http://siemens.com/bt/download.

ARG86.3

ARG70.3

ARG71 /

S55770-T137

N3009

2.6 Ordering

When ordering, i ndicate both product number and name: E.g. RDU340 room temperature controller Order valve actuators separately.

3 Use

Control of the room temperature in individual rooms of ventilation or air conditioni ng plants that are:

· Heat ed or cooled by single duct.

· Heated and cooled by single duct with aux iliary electrical heater.

The RDU340 is suitabl e for use with VAV systems in connection with the VAV compact controll ers types G…B181.1E/3.

The RDU340 control s

· One DC 0…10 V actuator

· One DC 0…10 V actuator and AC 230V 1-stage electrical heater

Use in systems with:

· Heating or cooling m ode

· Automatic heating/cooling changeov er

· Manual heating/cooli ng changeov er

· Heating and cooling (single duct with electrical heat er)

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4 Functions

4.1 Temperature control

General note

Display

The setting of t he control parameters (P01 etc., mentioned throughout the document) is descri bed in section 4.11.

The controller acquires the room temperat ure via built-in sensor, external room temperature sensor (QAA32), or external return air temperature sensor (QAH11.1), and maintains the setpoint by issuing actuator control commands to heating and/ or cooling equipment. The following control outputs are available:

· Modulating PI / P control wi th DC 0..10 V control output for actuators and ONOFF for electrical heater.

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 continuous PI control is 5 minutes (adjustable via parameter P35).

The display shows the acquired room temperat ure or the setpoint for the current operating mode, 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.

If the control ler is used in a system with manual heating/cooling changeover (P01=2), the heating

unit status. Thus, the symbols are displayed even when the cont roll er operates in the neutral zone. For all other cases, the heating

displayed when the heating or cooling out put is energized.

and cooling symbols on the display show the terminal

and cooling symbols are

Concurrent display of °C and °F

Concurrent di splay of the current tem perature or setpoint in °C and in °F (parameter P07) is possible on the controller without weekly time program.

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4.2 Operating modes

Select the controller's operating mode via operating mode button on the controller or operating mode input (e.g. keycard occupancy sensor, when X1 or X2 set to 3 (P38, P40)). A corresponding setpoint is used to maintain the room temperature at the desired level depending on the active operating mode. The following operating modes are available:

Comfort mode

Energy Saving

Note

Standby

/Protection mode

In Comfort mode, the controller maintains the setpoint which can be adjusted via the +/- buttons.

Energy Saving mode helps save energy. Select it by pressing the operating mode button

if parameter P02 is set accordingly, or if the external operating mode switchover contact is active (e.g. window contact). If the external operating mode switchover contact is active, user operations are ineffective and “OFF” is displayed. Control wil l then be according to energy saving setpoints (P11 and P12).

In Standby mode, the system is – prot ected against frost (f actory setting 8 °C, can be disabled or changed via P65). – prot ected against ov erheating (factory setting OFF, can be enabled or changed

via P66)

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4.3 Setpoints

Comfort mode

Setpoint limitation

P09 < P10

P09 ≥ P10

Examples Sin gle duct heating or cooling Single duct co oling with el he ater

P09 < P10

The setpoint in Comfort mode can be adjusted via the +/- buttons. For energy saving purposes, t he setpoint adjusting range can be limited to

minimum (P09) and maximum (P10).

· If the mi nimum limit P09 is set lower than the maximum limit P10, both heating and cooling are adjustable between these two limit s.

· For heating or cooling applications (e.g. single duct) – The setting range in cooling mode is from P09…40° instead of 5…40° – The setting range in heating mode is from 5…P10° instead of 5…40°

· For cooling and heating wit h el. heater applications (e.g. singl e duct) – The setting range is from P09…40° instead of 5…40° – The setpoint for the el. heater is maximal limited by P10

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

Setpoint adjustable 18…25°C Heating setpoi nt := Cooling setpoint – dead zone

P09 ≥ P10

Temporary setpoi nt

Energy Saving mode

Standby mode

Cooling settable 25…40°C

Heating settable 5…21°C

Setpoint adjustable 25…40°C

Heating setpoi nt := Cooling setpoint –

dead zone, but max (limited by) P10

If the “Temporary setpoint function” is enabled via parameter P69, the setpoint adjusted via the +/- buttons is set back to the Comfort basic setpoint when the operating mode changes.

The factory setting for the Comfort basic setpoint is 21 °C and can be changed via parameter P08.

Use control parameters P11 and P12 to adjust the Economy mode setpoints. The heating setpoint is factory-set to 15 °C and to 30 °C for cooling.

Use control parameters P65 and P66 to adjust the Standby mode setpoints. The heating setpoint is factory-set to 8 °C (frost protection) and to OFF for cooling.

Caution

If a setpoint is set to OFF (P65, P66), the controller does not maintain the setpoint in the corresponding mode (heating or cooli ng). This means no protective heating or cooling function and thus risk of frost in the heating mode or risk of overheat in cooling mode!

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