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Siemens RDG20 KN Series Basic Documentation

Siemens RDG20 KN Series Basic Documentation

Room thermostats, communicating and standalone
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RDG20..KN.. & RDG26..KN..,
RDG200T, RDG260T
Room thermostats,
communicating and standalone
Basic Documentation
A6V11545892_en--_e
Smart Infrastructure
2023-06-20

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  • Page 1 RDG20..KN.. & RDG26..KN.., RDG200T, RDG260T Room thermostats, communicating and standalone Basic Documentation A6V11545892_en--_e Smart Infrastructure 2023-06-20...

  • Page 2: Table Of Contents

    Table of Contents About this document .................5 Revision history ...................5 Reference documents ..................6 Before you start ...................7 1.3.1 Trademarks ..................7 1.3.2 Copyright ..................7 1.3.3 Quality assurance .................7 1.3.4 Document user/request to the reader ..........8 Target audience, prerequisites ..............8 Glossary ......................8 Overview ....................9 Types ......................9 Functions ....................10...
  • Page 3 4.6.6 Humidity (RDG2..KN) ..............60 4.6.7 Scheduler .................. 64 4.6.8 M/S, manager/subordinate (RDG2..KN) ........65 4.6.9 Preventive operation ..............69 4.6.10 NFC communication..............69 4.6.11 IAQ - CO2 monitoring and control (RDG2..KN) ......69 4.6.12 Power reserve clock (RDG2..T) ..........76 Control sequences ..................
  • Page 4 4.15.4 Expert level parameters with diagnostics and test ..... 142 Supported tools ..................148 ETS ......................148 5.1.1 Setting parameters in ETS ............149 ACS tool ....................151 5.2.1 Setting parameters in ACS ............151 5.2.2 Operation and monitoring with ACS........... 152 5.2.3 Operation and monitoring with OZW772 ........

  • Page 5: About This Document

    About this document Revision history 1 About this document 1.1 Revision history Edition Date Changes Section Product no. (product index) September First version. RDG200KN (A) 2020 RDG260KN (A) ● ● November Update NFC communication info 4.6.8 ● ● 2020 Update changeover picture 4.7.9.2 ●...

  • Page 6: Reference Documents

    Synco and KNX (see [10] KNX bus, data sheet CE1N3127 www.siemens.com/synco) [11] Communication via the KNX bus for Synco 700, 900 CE1P3127 and RXB/RXL, Basic documentation [12] Planning and commissioning protocol, communication XLS template in Synco 700...

  • Page 7: Before You Start

    1.3.2 Copyright This document may be duplicated and distributed only with the express permission of Siemens, and may be passed only to authorized persons or companies with the required technical knowledge. 1.3.3 Quality assurance This document is prepared with great care.

  • Page 8: Document User/Request To The Reader

    Target audience, prerequisites 1.3.4 Document user/request to the reader Before using products from Siemens Industry, Inc., it is important that you read the documents supplied with or ordered at the same time as the products (equipment, applications, tools, and so on) carefully and in full.

  • Page 9: Overview

    Overview Types 2 Overview 2.1 Types For fan coil units, universal applications and compressors in DX-type equipment applications KNX communication products Housing Operating Built-in Product no. Stock no. Number of control outputs color voltage sensor 3-speed On/Off PWM 3-pos DC On/Off (3-wire) Temperature...

  • Page 10: Functions

    Overview Functions 2.2 Functions Control application The RDG2.. room thermostats are designed for use with the following: Fan coil units via On/Off or modulating/DC control outputs: ● 2-pipe system ● 2-pipe system with electric heater ● 2-pipe system with radiator/floor heating ●...
  • Page 11 RDG204KN & RDG264KN) ● Application selection via DIP switches or external commissioning software Setting (RDG2..KN: ACS, ETS and Siemens smartphone app PCT Go; RDG2..T: Siemens smartphone app PCT Go) ● Parameter download with external commissioning software (RDG2..KN: ACS, ETS and Siemens smartphone app PCT Go; RDG2..T: Siemens smartphone app PCT Go) ●...
  • Page 12 Overview Functions ● Control of 6-port ball valve via KNX S-Mode objects (RDG20..KN and RDG26..KN) ● Flow limitation function for PICV in heating and cooling mode (RDG26..) ● Set holiday period to reduce energy consumption during absences (holidays) ● For 6-port PICV (RDG26..) –...
  • Page 13 ● Energy supply optimization via energy demand signal via Synco RMB795B central control unit ● Interworking with Siemens AQR.. and QMX.. sensors for room humidity, room temperature and CO measurement ● Interworking with Siemens QMX.. room operator units for room humidity, room temperature and operating commands for fan, operating mode and setpoints ●...

  • Page 14: Accessories

    2.3 Accessories Product Type Product/stock no. Datasheet series RDG2..KN KNX power supply 160 mA 5WG1 125-1AB02 TPI_N125 (Siemens BT LV) KNX power supply 320 mA 5WG1 125-1AB12 TPI_N125 (Siemens BT LV) KNX power supply 640 mA 5WG1 125-1AB22 TPI_N125 (Siemens BT LV)
  • Page 15 Overview Equipment combinations On/Off and PWM Type of unit Product no. Datasheet actuators Thermal actuator (for radiator valves) STA321.. A6V14028280 AC 230 V, NC Thermal actuator (for radiator valves) STA121.. A6V14028280 AC 24 V, NC Thermal actuator AC 230 V (for small STP321..
  • Page 16 Overview Equipment combinations On/Off actuators Product Type of unit Datasheet Electromotive On/Off actuator SFA21.. 4863 SFA71.. Electromotive On/Off valve and actuator MVI../MXI.. A6V11251892 (only available in AP, UAE, SA and IN) Electromotive actuator SUA21/3 A6V10446174 Electromotoric actuator for zone valve SUE21 A6V11866674 Electromotoric actuator for PICV...
  • Page 17 Overview Equipment combinations DC 0…10 V damper Type of unit Product no. Datasheet actuators Air damper actuators DC 0…10 V, GQD166.1A 4604 AC/DC 24 V GQD161.1A Air damper actuators DC 0…10 V, GDB16..1 4634 AC 24 V GLB16..1 Air damper actuators DC 0…10 V, GMA16..1 4614 AC/DC 24 V...

  • Page 18: Recommended Rdg Actuators And 6-Port Valves Combinations

    GDB181.1E/KN 3547 The documents can be downloaded from https://hit.sbt.siemens.com The PWM control on 2 or more thermal actuators in parallel can be considered for floor heating/radiator applications. If several fan coil units are controlled by the same room thermostat, motorized actuators with On/Off or 3-position control are preferred.

  • Page 19: Integration Via Knx Bus

    Synco ACS ● ETS5 or higher versions ● Siemens smartphone application PCT Go The RDG2..KN room thermostats are especially tailored for integration into the Synco 700 Synco 700 system and operate together in LTE-Mode. This extends the field of use of Synco for individual room control in conjunction with fan coil units, chilled ceilings and radiators.
  • Page 20 Gamma Instabus For lighting control and other room electrical applications Desigo and third-party The RDG2..KN thermostats can be integrated into the Siemens building systems automation and control systems (BACS) Desigo or into third-party systems. Either S-Mode (group addressing) or individual addressing can be used for integration.

  • Page 21: Notes

    Notes Mounting and installation 3 Notes 3.1 Mounting and installation ● Mounting The devices are suitable for wall mounting. Warning! Do not mount the device on a metallic surface: Use mounting adapter ARG200 where this is not possible. ● Recommended height: 1.5 m above the floor. ●...

  • Page 22: Commissioning

    If all DIP switches are Off, NO APPL displays, indicating that application commissioning via a tool is required. Commissioning via The Siemens smartphone application Product Commissioning Tool (PCT Go) is a Siemens smartphone commissioning tool that allows users to: application PCT Go ●...
  • Page 23 Assign KNX address Assign complete KNX address (area, line and device) via: (RDG2..KN) ● HMI or Siemens smartphone application PCT Go by setting parameters P898 (area address), P899 (line address) and P900 (device address) ● ACS or ETS (P900: device address) Set the device address to 255 to deactivate the communication (no exchange of process data).

  • Page 24: Operation

    Notes Operation 3.3 Operation The room thermostat consists of two parts: ● Plastic housing with electronics, operating elements and room temperature sensor ● Mounting plate with the screw terminals The housing engages in the mounting plate and is secured with 2 screws. Layout Standard (selectable scheduler) Hospitality...
  • Page 25 Notes Operation User action Effect, description Operating mode, indicator element Press left button (arrow, P001 = 3) changes to the next mode symbol. After the last press and a timeout of 3 seconds, the newly selected mode is confirmed, the other elements disappear.

  • Page 26: Remote Operation

    Notes Remote operation Symbol Description Symbol Description Operating mode Scheduler selection/Unit switching Fan speed selection Escape Delete schedule Confirm parameters Number of schedules or Time bar for schedule subordinate alarms Indoor air quality Outside temperature Additional user information, Morning: 12-hour format such as outside temperature, Afternoon: 12-hour format time of day from KNX bus,...

  • Page 27: Disposal

    Siemens’ portfolio undergoes continuous development to make it more secure. Siemens strongly recommends that updates are applied as soon as they are available and that the latest versions are used. Use of versions that are no longer supported, and failure to apply the latest updates may increase your exposure to cyber threats.

  • Page 28: Functions

    Functions Temperature control 4 Functions 4.1 Temperature control General note: Setting control parameters (P001 etc. mentioned throughout the document), see Parameters Control parameters [➙ 138]. Temperature control The thermostat acquires the room temperature via built-in sensor, external room temperature sensor (LG-Ni1000 or NTC 3k), external return air temperature sensor (LG-Ni1000 or NTC 3k) or via KNX (S-Mode or LTE-Mode), and maintains the setpoint by delivering actuator control commands to heating equipment, cooling equipment, or both.

  • Page 29: Operating Modes

    Functions Operating modes 4.2 Operating modes The thermostat operating mode can be influenced in different ways (see Different ways to influence operating mode [➙ 30]). Specific heating and cooling setpoints are assigned to each operating mode. Room operating mode: The thermostat sends the current room operating mode via bus. (RDG2..KN) State The following operating modes are available: Operating...

  • Page 30: Different Ways To Influence Operating Mode

    Functions Operating modes 4.2.1 Different ways to influence operating mode Source for change of Different interventions can influence the operating mode. operating mode The source of the actual room operating mode state can be monitored using the "Cause" diagnostic data point in the ACS tool or web server OZW772. (RDG2..KN) Source Description Value of data point...
  • Page 31 Functions Operating modes Priority Description Remark ● ④ Standard presence mode: If a room is Presence detector occupied, the operating mode changes to Comfort. This overrides the operating mode on the thermostat. Unoccupied rooms set back the thermostat to the previous operating mode. ●...
  • Page 32 Functions Operating modes The display shows the Auto mode symbol along with the symbol for the actual room operating mode (Comfort or Economy You can change the operating mode by pressing the operating mode button. The selected operating mode remains "temporary" until command "Room operating mode: Time switch"...
  • Page 33 Functions Operating modes Available op. End user P002 Description mode op. mode button Schedule via bus (RDG2..KN) Recommended for commercial buildings: ⇨ ● Switching manually between modes by pressing the operating mode button ● User settings are temporary and valid until the next switching event ⇨...
  • Page 34 Functions Operating modes The thermostat is forced into Protection mode when the window is open. The Window contact contact can be connected to multifunctional input X1, X2 or U1. Set P150, P153 or P155 to 3. User operations are ineffective and OFF displays if the window contact is active.
  • Page 35 Functions Operating modes User profile for Operating Mode Operatin Operating Function operating mode mode button g mode mode at (selected via P002) when during the end of activating function function function Comfort Extension Comfort Protection P002 = 1: Comfort Absence Protection Comfort Comfort or Extension...

  • Page 36: Communication Examples

    Functions Operating modes 4.2.2 Communication examples The following examples show 3 typical applications for a central time schedule together with local control of the room operating mode. The room operating mode in rooms 1…3 of a building is determined by the time schedule.
  • Page 37 Functions Operating modes Interaction of user operation (operating mode button) and central time Example 2 schedule In Room 2, the window is opened briefly, once in the morning and once in the late afternoon (1). Only the opening in the morning directly influences actual room operating mode. With the operating mode button, the operating mode can be changed between OFF and Auto or to temporary Comfort extension.

  • Page 38: Room Temperature Setpoints

    The factory setting for the Comfort basic setpoint is 21 °C and can be changed in the thermostat’s EEPROM via P011, bus with communication object "Comfort basic setpoint" or Siemens smartphone application PCT Go. The last option selected is always used.
  • Page 39 Functions Room temperature setpoints If, e.g., the thermostat receives a new Comfort basic setpoint from the bus (object 25 - Room temp: Comfort basic setpoint), the current Comfort setpoint is not updated immediately. Only when the operating mode is set back to Comfort, the Comfort setpoint is updated with the new Comfort basic setpoint.

  • Page 40: Setting And Adjusting Setpoints

    Local HMI ● KNX tool (RDG2..KN) Comfort basic setpoint ● Central control unit Comfort setpoint ● Siemens smartphone application PCT Go Economy heating setpoint The thermostat saves the setpoints to: Economy cooling ● EEPROM in the form of parameters setpoint ●...
  • Page 41 Functions Room temperature setpoints The figure below shows the interrelation: Only required for heating and cooling applications (see Setpoints and sequences [➙ 99]) LTE-Mode: Shift is added to the local shift S-Mode: The last option selected is always used, either S-Mode input or local operation To display the S-Mode objects of the Economy heating and cooling setpoint (P019/P020), set the control parameter "Room temperature: Economy setpoints"...
  • Page 42 Functions Room temperature setpoints Clarification concerning The Comfort setpoint w (e.g., customer setting on the display) and the current current setpoint in setpoint w2 (used by the thermostat for temperature control, but not displayed) are Comfort mode handled differently depending on the selected application and setting. 2-pipe with P010 = 1 or Both the Comfort setpoint w and current setpoint w2 have the same value.

  • Page 43: Application Overview

    Remote configuration, via commissioning tool (factory setting) ON = ● Synco ACS (RDG2..KN) DIP NO.: 1…5 ● ETS (RDG2..KN) ● Commissioning via Siemens smartphone application PCT OFF = DIP NO.: 1…5 RDG20.. RDG26.. Application Application Fan coil fan speed Fan coil fan speed...

  • Page 44: Applications For Fan Coil Systems

    Functions Application overview 4.4.1 Applications for fan coil systems Applications, DIP setting, control outputs ● ● ● 2-pipe fan coil unit 2-pipe fan coil unit 2-pipe fan coil unit with radiator/floor with electric heater heating Using RDG2..KN, RDG2..T Using RDG2..KN, RDG2..T Using RDG2..KN, RDG2..T ●...

  • Page 45: Applications For Universal Systems

    Functions Application overview 4.4.2 Applications for universal systems Applications, DIP setting, control outputs ● ● ● Chilled/heated Chilled/ Chilled/heated heated ceiling ceiling and ceiling and electric radiator/floor heater heating Using RDG2..KN, RDG2..T Using RDG2..KN, RDG2..T Using RDG2..KN, RDG2..T ● ● ●...

  • Page 46: Application For Heat Pump Systems

    Functions Application overview 4.4.3 Application for heat pump systems Applications, DIP setting, control outputs ● ● Heated or cooled with Heated or cooled with compressors compressors with electric heater Using RDG2..KN, RDG2..T Using RDG2..KN, RDG2..T ● ● Heated and cooled with 2-stage heated or cooled compressors with compressors...

  • Page 47: Power Supply Selection For Rdg20

    Functions Power supply selection for RDG20..KN 4.5 Power supply selection for RDG20..KN The RDG20..KN can be powered either on AC 230 V or AC 24 V. The desired power supply is selected via the power switch on the rear of the device.

  • Page 48: Additional Functions

    Functions Additional functions 4.6 Additional functions Functions (parameters) Description Standalone Sensors and changeover functions [➙ 49] ● ✓ Heating/cooling changeover via bus Central control of heating / cooling via bus 2..KN (KNX) ✓ ✓ ● Automatic heating/cooling changeover Auto changeover on each equipment via changeover sensor ●...

  • Page 49: Sensors And Changeover Functions

    Avoid damage from moisture (P363, To prevent from damage of moisture P364) NFC communication [➙ 69] ● ✓ ✓ NFC communication via Siemens smartphone NFC (P500) application IAQ - CO2 monitoring and control (RDG2..KN) [➙ 69] (RDG204KN, RDG264KN) ● ✓...

  • Page 50: Presence Detector

    Functions Additional functions The water temperature is acquired and the operating state is updated accordingly. Operating mode Cooling mode Water temperature Heating mode The setting range is 5 °C...P060-2 K for P059 and P059+2 K… 40 °C for P060. Note Changeover switch When P001 = 2 (H/C changeover auto) is selected, an NTC 3k or LG-Ni1000 cable (P150, P153, P155)
  • Page 51 Functions Additional functions Presence detection is also possible via bus (RDG2..KN). In this case, do not assign the function to any local input X1, X2 or U1. Time schedule via Presence detector behavior bus (RDG2..KN) When the presence detector is activated or deactivated, the Comfort mode operating mode remains in Comfort.

  • Page 52: Output Functions

    Functions Additional functions 4.6.3 Output functions Purge function (P251) The changeover sensor ensures changeover between heating and cooling mode based on the acquired water temperature. We recommend activating the Purge function (P251) with 2-port valves. This function ensures correct acquisition of the medium temperature even if the 2-port valve is closed for an extended period of time.
  • Page 53 Functions Additional functions You can use fan coil unit heating/cooling sequences for floor heating or cooling by disabling the fan via P350. Qx relay switching The following functions allow the control of external equipment connected to the function (P400, P401, Q1, Q2 and Q3 relay outputs: P402) Function description...

  • Page 54: Monitoring And Limiting Functions

    Functions Additional functions To enable the function, set the related output parameter: ● To energize the output during heating/cooling demand, set the parameter to 2. ● To energize the output during heating demand, set the parameter to 3. ● To energize the output during cooling demand, set the parameter to 4. For application examples, see Relay functions [➙...
  • Page 55 Functions Additional functions The "Floor temperature limitation" function influences the outputs listed in the table below: “Floor temp.limit” function has impact on Output Output Output Output Application Remark Y1/Y10 Y2/Y20 Y3/Y30 Y4/U1 Heating Cooling Heating and (P001 = 0/2/3) P001 = 1/2/3 Cooling (P001 = 4) 2-pipe...
  • Page 56 Functions Additional functions RDG264KN and previous RDG260KN software versions use parameter P256 to Note adjust max flow limitation on the PICV for heating. Limiting the water flow for cooling is not available The function can be enabled on all combined heating/cooling applications with DC 0...10 V output for universal and fan coil unit applications.

  • Page 57: User Operation / Indication

    Functions Additional functions Return flow temperature For district heating systems (2-pipe systems), this function is used to increase the control (P061/P062) system efficiency. It guarantees that the delta temperature between flow and return temperature for water does not drop below the defined setpoint selected by P061 for cooling and P062 for heating.
  • Page 58 Functions Additional functions Auto lock operating mode, locked locked setpoint shift Auto lock operating mode, locked locked fan speed Auto lock fan speed, locked locked setpoint shift Auto lock scheduler locked Auto lock operating mode, locked locked scheduler Auto lock scheduler, fan locked locked speed...
  • Page 59 Functions Additional functions Energy-efficient setting Exceed the preset energy-efficient range Touch to reset user setting Set Time / date Set TIME WARNING Time synchronization via bus (RDG2..KN) Time of day and date information are received from a Synco controller with time manager function (RMB, OWZ, etc) or any other KNX device e.g.

  • Page 60: Humidity (Rdg2

    Functions Additional functions Set DATE The scheduler function must be enabled before setting the date: ● Press once and then turn the rotary knob or press continuously to select programming mode DATE. ● Press once to enter the date setting. ●...
  • Page 61 Functions Additional functions – If the parameter is set to Send (factory setting), the thermostat can display the humidity value measured by the built-in sensor and the value is sent to the bus. 2. LTE-Mode The thermostat displays the relative humidity value on the bus if the external KNX sensor is in the same geographic zone apartment and room (A.R.1) as the thermostat.
  • Page 62 Functions Additional functions Applications with a 3-speed fan: ● The external dehumidifier is controlled via external DC – On/Off converter connected to analog output Y50. The output signal is DC 10 V if dehumidification control is requested. ● Output Y50 remains On for min. 30 seconds (not selectable). ●...
  • Page 63 Functions Additional functions For heating and cooling applications, the value of the dead zone (P055) must be Note bigger than the maximum shifting temperature setpoint (P461), to avoid changeover between heating and cooling sequences in the event of fast humidity changes in the room.

  • Page 64: Scheduler

    Time of day via bus, HMI or Siemens smartphone application PCT Go display on the thermostat (P009 = 3 or 4) in either 12- or 24-hour format. The option selected last is used.

  • Page 65: M/S, Manager/Subordinate (Rdg2

    Functions Additional functions Example 1: schedule is 8:00…12:00 and the 2 is 13:00…17:00. If the newly added The 1 schedule starts at 10:00 and ends at 12:30, the schedule order is 1 schedule (8:00…12:30) and 2 schedule (13:00…17:00) after the change is confirmed by pressing Example 2: schedule is 8:00…12:00 and the 2...
  • Page 66 Functions Additional functions ● Manager and subordinates can be bound as one group via setting their geographical zone (apart.) P901 and geographical zone (room) P902 to same value. ● Synchronization works even if the manager and subordinate are different products or set with different applications. ●...
  • Page 67 Only the presence detector on the manager (external or built-in) controls the M/S - manager/subordinate loop accordingly. Presence detection on local input takes priority. Setting manager / The M/S - manager/subordinate is configured via ETS/ACS or Siemens subordinate smartphone application PCT Go. Basic setting Set the thermostat as subordinate: (Default parameter setting is manager.)
  • Page 68 Functions Additional functions 4.6.8.2 Manager/subordinate communication in LTE-Mode The manager thermostat shares the configuration with its subordinates for the following: ● Room temperature and humidity value ● Operating mode ● Manual fan speed ● Current room setpoint and ChangeOverWaterStatus If any of the above values is changed on the manager, the change is synchronized to all subordinates within the same zone.

  • Page 69: Preventive Operation

    When NFC communication is enabled, the parameters can be configured even if the thermostat has no power. ● The phone must have active NFC functionality. For commissioning via Siemens smartphone application PCT Go, see Commissioning. 4.6.11 IAQ - CO2 monitoring and control (RDG2..KN) RDG204KN and RDG264KN with built-in CO sensor can be used for: ●...
  • Page 70 Functions Additional functions The RDG2..4KN can also be used as standalone device. A bus connection is not required for on-screen CO indications. The CO monitoring function can be enabled for all fan coil and universal heating / cooling applications (without fan control). Set P450 (Control strategy) = 0 and P009 (Additional display information) to the requested IAQ information on the display.
  • Page 71 Functions Additional functions IAQ CO concentration, level indication: GOOD BUON BIEN GOED GOOD GOOD FAIR FAIR FAIR FAIR FAIR BASS MALA LAAG GOOD GOOD GOOD GOOD GOOD GOOD FAIR FAIR FAIR FAIR FAIR ORTA FAIR DLIG KOTU ● The thermostat displays "---" if the received value is ≥5000 ppm. Error display ●...
  • Page 72 Functions Additional functions Supported use cases with IAQ control: a) Fan coil with integrated b) Fan coil with integrated c) Fan coil system RDG2..4KN for d) Universal heating/cooling damper damper monitoring. systems. Fresh air from ventilation system Fresh air from outside Optional: Ventilation system for RDG2..4KN for CO monitoring.
  • Page 73 Functions Additional functions RDG204KN fan coil and universal (CLC, with no fan) applications with IAQ control: H/C Control outputs Damper signal signal combination application 3-speed On/Off ✓ ✓ ✓ ✓ ● 2-pipe On/Off (PWM) ✓ ✓ ● ✓ ✓ 3-pos ✓...
  • Page 74 Functions Additional functions IAQ - CO control, IAQ - CO S-Mode objects: KNX objects ● 100 Built-in room air quality values (out) ● 101 External room air quality values (in, for M/S – manager/subordinate function) ● 102 DC damper demand (1-byte out) ●...
  • Page 75 Functions Additional functions IAQ control with On/Off damper: P453 = 2 or 3 If On/Off damper control is selected, the following parameters are available: ● P453: Indoor air quality damper (2 = On/Off (normally open), 3 = On/Off (normally closed)) ●...

  • Page 76: Power Reserve Clock (Rdg2

    Functions Additional functions control versus The CO control takes precedence (higher priority) over temperature control. temperature control The room temperature setpoint may not be maintained during active CO control depending on the size of the HVAC system. Check sizing and balancing if this is the case. The CO setpoint (and P-Band) can be increased as an alternative.

  • Page 77: Control Sequences

    Functions Control sequences 4.7 Control sequences 4.7.1 Sequence overview (setting via P001) The main control sequence (water coil sequence of the fan coil unit) can be set via P001. The following sequences can be activated in the thermostats (with or without auxiliary heating).

  • Page 78: Application Mode

    Functions Control sequences 4.7.2 Application mode The behavior of the thermostat can be influenced via building automation and control system (BACS) and bus using command "Application mode". Cooling, heating or both can be enabled or disabled using this signal. Application Application mode mode is supported in LTE-Mode and S-Mode.
  • Page 79 Functions Control sequences Application mode (via State Control sequence state bus) changeover/continuous (ACS diagnostic value) heating or cooling Auto (0) Heating Heating Cooling Cooling Heat (1), (2), (8) Heating Heating Cooling Heating Cool (3), (5) Heating Cooling Cooling Cooling Night purge (4), Heating Heating Fan only (9)

  • Page 80: 2-Pipe Fan Coil Unit

    Functions Control sequences 4.7.3 2-pipe fan coil unit In 2-pipe applications, the thermostat controls a valve in heating/cooling mode with changeover (automatically or manually), heating only, or cooling only (factory setting, P001 = 1). On/Off control The diagrams below show the control sequence for On/Off control. Control sequence Heating mode Cooling mode...

  • Page 81: 2-Pipe Fan Coil Unit With Electric Heater

    Functions Control sequences 4.7.4 2-pipe fan coil unit with electric heater Heating or cooling with In 2-pipe applications with electric heater, the thermostat controls a valve in auxiliary heater heating/cooling mode with changeover, heating only, or cooling only plus an auxiliary electric heater.
  • Page 82 Functions Control sequences In this case, an electric heater is connected directly to outputs Q2 (RDG26..KN), and the current heats up the relay contact. This falsifies the internal temperature sensor reading. The thermostat compensates the temperature, if the rated power of the electric heating is entered at P217.

  • Page 83: 2-Pipe Fan Coil Unit With Radiator Or Floor Heating

    Functions Control sequences 4.7.5 2-pipe fan coil unit with radiator or floor heating Heating or cooling with In 2-pipe applications with radiator, the thermostat controls a valve in radiator or floor heating heating/cooling mode with changeover, heating only, or cooling only plus a radiator valve.
  • Page 84 Functions Control sequences Modulating control: The diagrams below show the control sequence for modulating PI control. 3-position, PWM or Heating mode Cooling mode DC 0...10 V Proportional band "Heating" T[°C] Room temperature (P050) Proportional band "Cooling" Room temperature setpoint (P052) Control command "Valve"...

  • Page 85: 2-Stage On 2-Pipe/4-Pipe Heating And Cooling

    Functions Control sequences 4.7.6 2-stage on 2-pipe/4-pipe heating and cooling 2-stage heating or In 2-stage applications, the thermostat controls 2 valves or 2-stage compressors in cooling series: ● 2-pipe/2-stage: in heating or cooling mode or changeover (automatically or manually). "Cooling only" is factory-set (P001 = 1) ●...
  • Page 86 Functions Control sequences 4.7.6.1 2-pipe/2-stage heating or cooling In heating mode, the 1 stage is activated if the acquired temperature is below the Heating mode setpoint. The 2 stage is activated if the acquired room temperature drops below "setpoint" minus "setpoint differential". In cooling mode, the 1 stage is activated if the acquired temperature is above the Cooling mode...
  • Page 87 Functions Control sequences Modulating control: The diagrams below show the control sequence for modulating PI control. 3-position, PWM or DC 0…10 V Heating mode (P001 = 0) Cooling mode (P001 = 1) Changeover (P001 = 2 or P001 = 3, Changeover (P001 = 2 or P001 = 3, P254 = 0) P254 = 1) (swap function)
  • Page 88 Functions Control sequences 4.7.6.2 4-pipe/2-stage heating and cooling (RDG2..KN) Heating and cooling In 4-pipe/2-stage applications, the thermostat controls max. 4 valves in heating and mode cooling mode or heating/cooling mode by manual selection. Heating and cooling mode (P001 = 4) is factory-set. The 1 stage is activated when the acquired temperature is below (heating) or above (cooling) the setpoint.
  • Page 89 Functions Control sequences Modulating control: The diagrams below show the control sequence for modulating PI control. PWM or DC 0…10 V Heating and cooling mode (P001 = 4) Heating mode with manual selection Cooling mode with manual selection (P001 = 3) or (P001 = 3) or to save energy (P010 = 2 &...

  • Page 90: 4-Pipe Fan Coil Unit

    Functions Control sequences 4.7.7 4-pipe fan coil unit In 4-pipe applications, the thermostat controls 2 valves in heating and cooling Heating and cooling mode, heating/cooling mode by manual selection. Heating and cooling mode (P001 = 4) is factory-set. 4-pipe application with The heating or cooling output can be released via operating mode button if P001 is manual changeover set to Manual (P001 = 3).
  • Page 91 Functions Control sequences Modulating control: The diagrams below show the control sequence of modulating PI control. 3-position, PWM, or Heating and cooling mode (P001 = 4) DC 0...10 V Heating mode with manual selection Cooling mode with manual selection (P001 = 3) or (P001 = 3) or for energy saving (P010 = 2 &...
  • Page 92 Functions Control sequences 4.7.7.1 4-pipe application with one valve: 6-port ball valve or 6- port PICV (RDG26..) RDG26.. can control a 6-port ball valve or 6-port PICV for fan coil applications. ● 4-pipe with 6-port ball valve (DIP4 = ON) ●...
  • Page 93 Functions Control sequences 4.7.7.2 4-pipe application with PICV and 6-port control ball valve as changeover (RDG26..) In a 4-pipe fan coil application with DC 0...10 V fan control, the RDG26..KN controls a combi valve (PICV) in combination with a 6-port ball valve as changeover.
  • Page 94 Functions Control sequences DC 0…10 V signal T[℃] Room temperature Control command "Valve" Room temperature setpoint (heating) Control command "Valve" P260 Flow limitation function for (cooling) heating only Flow limitation function for P261 cooling only The connection diagram for 4-pipe applications with PICV and 6-port ball valve as changeover is available in Connection diagrams [➙...

  • Page 95: 4-Pipe Fan Coil Unit With Electric Heater

    Functions Control sequences 4.7.8 4-pipe fan coil unit with electric heater Heating and cooling with In 4-pipe applications with electric heater, the thermostat controls 2 valves in auxiliary heater heating and cooling mode by manual selection, heating only, or cooling only plus an auxiliary electric heater.
  • Page 96 Functions Control sequences Modulating control: The diagrams below show the control sequence for modulating PI control. 3-position or PWM Heating and cooling (P001 = 4) Heating mode with manual selection Cooling mode with manual selection (P001 = 3) (P001 = 3) T[°C] Room temperature Control command "EI heater"...

  • Page 97: Chilled/Heated Ceiling And Radiator Applications

    Functions Control sequences 4.7.9 Chilled/heated ceiling and radiator applications For chilled/heated ceiling and radiator applications ● Set the corresponding basic application see Application overview [➙ 43]. ● Disable the fan (P350) The following applications are available: Application for Basic application Section Sequences chilled/heated ceiling,...

  • Page 98: Compressor Applications

    Functions Control sequences 4.7.10 Compressor applications For compressor applications, ● Set the corresponding basic application as per Application overview [➙ 43]. ● Disable the fan (P350) or set the type of fan speed (P351) ● Select the type of control outputs (On/Off, P201, P203, P204, P205) The following applications are available: Application for compressor Basic application...

  • Page 99: Applications With External Aqr Sensor Or Qmx Room Operator Unit (Rdg2

    Functions Control sequences 4.7.11 Applications with external AQR sensor or QMX room operator unit (RDG2..KN) The equipment combination is intended for commercial buildings, offices, schools, museums, shops, etc. Advantages of equipment combination AQR/QMX sensor LTE- S-Mode Mode ✓ ✓ Sensor can be installed in the optimal place for temperature and humidity measurement.
  • Page 100 Functions Control sequences Application Comfort mode Economy/Protection mode Heating Cooling Heating Cooling 2-pipe 2-pipe with electric heater 2-pipe with radiator 2-pipe/ 2-stage heating or cooling If P027 = On W = Setpoint in Comfort mode = Setpoint heating in Economy or Protection mode HeatEco/Prot = Setpoint cooling in Economy or Protection mode CoolEco/Prot...

  • Page 101: Control Outputs

    Functions Control outputs Economy/Protection Application Comfort mode mode Heating and cooling Heating only or heating Cooling only or heating Heating and/or cooling P010 = 1 and cooling and cooling P010 = 2 P010 = 2 4-pipe 4-pipe with electric heater 4-pipe/2-stage (RDG2..KN) Manual changeover, P001 = 3...
  • Page 102 Functions Control outputs On/Off control signal The valve receives the On command via control output Y1 (Q1 on RDG26..) or Y3 (2-position) (Q2 on RDG26..), if: 1. The acquired room temperature is below the setpoint (for heating) or above the setpoint (for cooling), 2.
  • Page 103 Functions Control outputs Synchronization 1. When the thermostat is powered up, a close command for the actuator run time by + 150 % is issued to ensure the actuator closes fully and synchronizes to the control algorithm. 2. When the thermostat calculates the positions "fully close" or "fully open", the actuator run time is extended by + 150 % to ensure the correct actuator position is synchronized to the control algorithm.
  • Page 104 DC 2…10 V cooling within one DC 0…10 V or DC 2…10 V signal. for 6-port control ball These 2 signals allow for controlling Siemens valves as well as DC 2…10 V valves valve (RDG26.. only) by other suppliers. For the same application, RDG26.. can also provide an inverse signal DC 10…0 V or DC 10…2 V signal for inversed hydraulic connections on the valve.

  • Page 105: Control Output Configuration For 6-Port Valve (P201)

    DC 2…10 V signal. The control output is Y10 and cannot be changed. (RDG26.. only) The 2 signals control Siemens and third-party valves/actuators. For the same application, RDG26.. can also provide an inverse signal DC 10…0 V or DC 10…2 V signal for inversed hydraulic connections on the valve.

  • Page 106: Control Output Configuration (Setting Via Dip Switches 7/8 Or Tool, And P201/P203/P204/P205)

    Functions Control outputs 4.8.3 Control output configuration (setting via DIP switches 7/8 or tool, and P201/P203/P204/P205) Overview Application Control outputs Product no. Mod. DC 0…10 V On/Off DC 0...10 V 3-speed/ On/Off Mod. PWM Mod. 3- RDG.. pos. 1-speed (2-pos) (3-wire) (2-pos) ✓...
  • Page 107 Functions Control outputs RDG20.. The type of the control outputs (2- or 3-position) is set via DIP switches 7 and 8. Patterns of DIP switches 7 and 8: DIP NO.: 7…8 ➨ ON = , OFF = Y1/Y3 = 2-position (PWM) 2-position (PWM) 3-position 3-position...

  • Page 108: Fan Control

    The fan control signal (DC 0…10 V or 3-speed) is selected via DIP switch 6, local HMI (P351) or tool (ACS, ETS or Siemens smartphone application PCT Go). The fan operates in automatic mode or at the speed selected in manual mode.
  • Page 109 Functions Fan control Fan control with For 3-speed fan control: modulating The individual switching points for each fan stage can be adjusted via heating/cooling control P353…P355. The fan speed switch off point is 20% below the switch on point. The (PWM, 3-pos or diagrams below show fan speed control for modulating PI control.
  • Page 110 Functions Fan control Fan control with On/Off In applications with On/Off control: heating/cooling control 1. The switching point for low fan speed is synchronized to the heating/cooling output. P353 (switching point fan speed low) is not relevant. 2. The maximum switching range of the fan (XpH /XpC ) is defined by the switching differential (SDH/SDC) via a reference table.
  • Page 111 Functions Fan control Manual operation Fan speed I = Min. fan speed selectable via P357 DC 0...10 V fan Fan speed II = Medium fan speed selectable via P358 When the DC fan characteristic is not linear, fan speed II can be adapted to an efficient manual speed II.
  • Page 112 Functions Fan control ● Notes The output for the 1 stage (YHC1) in heating mode is also the 1 stage in cooling ● This function is available for DC/3-speed/1-speed fans Example 2 We recommend enabling the swap function on applications with fan coil units and floor heating/cooling.
  • Page 113 Functions Fan control Fan operation as per Fan operation can be limited to be active with cooling only or heating only, or even heating/cooling mode, or disabled via P350. disabled When fan operation is disabled, the fan symbol on the display disappears and pressing the fan button has no impact.
  • Page 114 Functions Fan control Fan start, minimum In the heating sequence, when the return water temperature exceeds 30 °C water temperature (factory setting, P366), fan operation is enabled even if the fan start delay time (P366) (P365) is not reached. The universal input "coil temperature" (P150, P153 or P155 = 12) is required to activate this function.

  • Page 115: Multifunctional Input, Digital Input

    Functions Multifunctional input, digital input ● Also be disabled (P350 = 0) ● Run only in heating (P350 = 2) sequence ● Run only in cooling (P350 = 3) sequence For this application, only DC fan control is available at output Y50. 4.10 Multifunctional input, digital input The thermostat has 3 multifunctional inputs X1, X2 and U1.
  • Page 116 Functions Multifunctional input, digital input Type Input function Description X1/X2/U1/ Fault Digital input to signal an external fault (e.g.: dirty air filter). If the input is active, ALx is displayed and a fault is Fault sent on the bus. See also Fault and alarms function information on KNX [➙...

  • Page 117: Handling System Faults

    Functions Handling system faults Type Input function Description X1/X2/U1/ 14 Coil return temperature To save energy, the thermostat controls the valve to adjust flow speed when ΔT between flow and return temperature value is less than P061 or P062. See also Monitoring and limiting functions [➙...

  • Page 118: Knx Communications (Rdg2

    Functions KNX communications (RDG2..KN) For fault status messages on the bus, see Fault and alarms function on KNX [➙ 128]. 4.12 KNX communications (RDG2..KN) RDG2..KN thermostats support communications as per KNX specifications. S-Mode Standard mode; engineering via group addresses. LTE-Mode Logical Tag Extended mode, for easy engineering, is used together with Synco.
  • Page 119 Functions KNX communications (RDG2..KN) If a thermostat is set as subordinate, parameter P259 value needs to be set accordingly. Note The following two M/S - manager/subordinate binding options are alternatives. They cannot be used together. M/S - manager/subordinate binding via P901 & P902 Manager and subordinate binding is set using parameters P901 and P902.
  • Page 120 Functions KNX communications (RDG2..KN) ● Binding setting on subordinate M/S - manager/subordinate binding via communication objects The M/S - manager/subordinate binding is set using communication objects, for object details, see Manager/subordinate communication in KNX S-Mode [➙ 68]. S-Mode objects manager S-Mode objects subordinate Setpoint: [90]...

  • Page 121: Lte-Mode

    Functions KNX communications (RDG2..KN) ● Binding setting on manager ● Binding setting on subordinate 4.12.3 LTE-Mode LTE-Mode was specifically designed to simplify engineering. Unlike with S-Mode, individual connections (group addresses) need not be created in the tool. The devices autonomously establish connections. Definitions The following circumstances are predefined: ●...

  • Page 122: Zone Addressing In Lte-Mode (With Synco)

    Functions KNX communications (RDG2..KN) 4.12.4 Zone addressing in LTE-Mode (with Synco) Zone addresses must be allocated where RDG2..KN KNX room thermostats are used in LTE-Mode (e.g. in conjunction with Synco). The following zone addresses must be defined together with the Synco devices at the planning stage based on application.

  • Page 123: M/S, Manager/Subordinate Configuration In Lte-Mode

    Functions KNX communications (RDG2..KN) Heat distribution zone heating coil Information related specifically to the hot water system in heating coils is Zone = ---, 1...31 exchanged within this zone. The zone also includes a Synco device to process the information (e.g., RMH7xx or RMU7xx with changeover). Heat distribution zone heating Information related specifically to the hot water system of a radiator is surface (radiator)
  • Page 124 Functions KNX communications (RDG2..KN) If the device is set as Subordinate, parameter P259 value needs to be set accordingly. Select Applications ➙ Plant operation ➙ Settings ➙ Communication, then set parameters P901 and P902. 124 | 186 A6V11545892_en--_e...
  • Page 125 Functions KNX communications (RDG2..KN) A6V11545892_en--_e 125 | 186...

  • Page 126: Example Of Heating And Cooling Demand Zones

    Functions KNX communications (RDG2..KN) 4.12.6 Example of heating and cooling demand zones The building is equipped with Synco controls on the generation side and RDF../RDU../RDG.. room thermostats on the room side. Explanation relating to In the case of a typical application, the individual RDF../RDG.. room thermostats the illustration send their heat demand to the primary controller (in the above example to the RMH760).

  • Page 127: Startup

    Functions KNX communications (RDG2..KN) LTE-Mode/S-Mode Fixed times are specified as follows: ● Receive timeout: 31 minutes ● Send heartbeat: 15 minutes Object [KNX obj. no.] Minutes Default value Room operating mode: Receive Comfort Time switch [13] * Application mode [48] Receive Auto Heating/Cooling mode status...

  • Page 128: Fault And Alarms Function On Knx

    Functions KNX communications (RDG2..KN) 4.12.10 Fault and alarms function on KNX A fault is sent on the bus in the event of a fault occur (for example, digital fault input, Dewpoint, communication configuration, etc.). An RDG2..KN room thermostat monitors the bus and sends its fault, if the fault has the highest alarm priority.

  • Page 129: Communication Objects (Rdg2

    Functions Communication objects (RDG2..KN) Thermostat Fault information on Priorities Fault Default Text Display Error code fault text adjustable ✓ Clean filter 3911 Dirty filter reminder ✓ Room sensor Room error sensor error ✓ Internal Internal error 1800 error Sensor error [N.X1] ✓...
  • Page 130 Functions Communication objects (RDG2..KN) Object No. and name Thermostat Object No. and name 1 System time 4 Fault information 2 Date 5 Fault status (0 = No alarm / 1 = Alarm) 3 Time of day 8 Room operating mode: Preselection 6 Fault transmission (0 = Disable / 1 = Enable) 94 Room operating mode: Status (receive) 17 Room operating mode: Status...

  • Page 131: Description Of Communication Objects

    Functions Communication objects (RDG2..KN) 4.13.2 Description of communication objects Type/ Object name Function Flags Type/ Object name Function Flags length length System time Time and date 19.001 Room operating 1.017 Trigger 8 bytes mode: 1 bit Preselection System time for display on the room thermostat. See P009 (3 or 4) - Auto - Comfort Date...
  • Page 132 Functions Communication objects (RDG2..KN) Object name Function Type/ Flags Object name Function Type/ Flags length length Room temp: [P19] Temperature 9.001 Room temp: Temperature 9.001 Economy heating 2 bytes Comfort setpoint 2 bytes setpoint abs (receive) Communication object adjusts the Economy heating setpoint used Communication object shifts the setpoint (absolute) used by the by the thermostat (Manager) (see Setting and adjusting setpoints [ thermostat (Manager) received via bus (see Setting and adjusting...
  • Page 133 Functions Communication objects (RDG2..KN) Object name Function Type/ Flags Object name Function Type/ Flags length length Extended comfort 1.011 Application mode HVAC control 20.105 mode status 1 bit mode 1 byte Indicates the status of Comfort mode extension of manager. Auto (default) Heating and/or cooling External room...
  • Page 134 Functions Communication objects (RDG2..KN) Object name Function Type/ Flags Object name Function Type/ Flags length length 0…100 % Fan output 5.001 Heating, control Inactive 1.011 1 byte value status Active 1 bit Indicates the current fan speed as a value 0...100 %. Indicates the control status of heating actuator of the first stage Speed DC fan output (physical...
  • Page 135 Functions Communication objects (RDG2..KN) Object name Function Type/ Flags Object name Function Type/ Flags length length Hum. Control Inactive 20.115 Enable or disable Disable 1.003 mode Humidification 1 byte Leaf indication Enable 1 bit Dehumidification Enables or disables the leaf (green or red) indication. Indicates the mode of the humidity control function: Keypad: Lock fan Lock...
  • Page 136 Functions Communication objects (RDG2..KN) Object name Function Type/ Flags Object name Function Type/ Flags length length Room temp: 9.001 Temperature DC fan speed: 5.001 0...100 % Current cooling 2 bytes Maximum speed 1 byte setpoint (receive) cooling Communication object adjusts the current cooling setpoint DC fan speed for maximum cooling output received via bus.

  • Page 137: Communication Objects (Lte-Mode) (Rdg2

    Functions Communication objects (LTE-Mode) (RDG2..KN) 4.14 Communication objects (LTE-Mode) (RDG2..KN) Geographical zone A.R.S (Time switch zone) Room operating mode: Time switch X.1.1/X.Y.1 Application mode Geographical zone Room operating mode: Preselection A.R.S X.Y.1 Room temperature Comfort setpoint Room humidity [% r.h.] Setpoint heating Setpoint cooling Fan speed...

  • Page 138: Control Parameters

    4.15 Control parameters To optimize control performance, a number of control parameters can be readjusted on the thermostat via HMI, commissioning/operating tool, or Siemens smartphone application PCT Go. These parameters can also be set during operation without opening the unit.

  • Page 139: Setting/Downloading Parameter Via Tool (Rdg2

    Functions Control parameters 4.15.2 Setting/downloading parameter via tool (RDG2..KN) The 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… ●...

  • Page 140: Service Level Parameters

    Functions Control parameters 4.15.3 Service level parameters Parameter display depends on selected application and function. Appl means application. Parameter values are only visible when the device is set as Manager (M), Subordinate (S) or both identification (✓). Name Service level ✓...
  • Page 141 Functions Control parameters Name Service level ✓ ✓ P023 Indoor air quality setpoint 1000 ppm 10...2000 ppm P450 (RDG2..KN) --- (0), P026 or 20…90 % P024 Humidity setpoint high (RDG2..KN) P450, P258 --- (0), P026…90 %, or 20…90 % P025 Humidity setpoint high ECO P258 (RDG2..KN)

  • Page 142: Expert Level Parameters With Diagnostics And Test

    Functions Control parameters 4.15.4 Expert level parameters with diagnostics and test Parameter display depends on selected application and function. Parameter values are only visible when the device is set as Manager (M), Subordinate (S) or both identification (✓). Name Expert level Control settings ✓...
  • Page 143 Functions Control parameters Name Expert level Inputs ✓ ✓ P150 Input X1 P150:1 0 = --- (no function) P153: ✓ ✓ RDG2..KN: 0...14 P153: 1 = Room / return temperature P150, RDG2..T: 0...6 & 9...14 RDG2..KN: 0 2 = H/C changeover P155 ✓...
  • Page 144 Functions Control parameters Name Expert level ✓ 20…300 s ‒ P214 RDG20..: Actuator running time Y1 150 s P214: and Y3 for 3-pos P201 P215: P215 RDG20..: Actuator running time Y2 P203 and Y4 for 3-pos ✓ ✓ 0.0…1.2 kW P217 RDG26..: Power of electric heater on 0 kW...
  • Page 145 Functions Control parameters Name Expert level ✓ ✓ 1…89 min, --- (0) P363 Periodic fan kick Comfort P350 ✓ ✓ 0…359 min, --- P364 Periodic fan kick Economy P350 ✓ ✓ P365 Fan start delay 0...360 s P350 ✓ ✓ --- (0),5…60 °C P366 Fan start, minimum water temperature...
  • Page 146 Functions Control parameters Note: Appl means application. When P201/P203 = 1/3/5, P204/P205 = 3/5, P057 & P058 are visible. When P150, P153 or P155 = 2 and P001 = 2, P059 & P060 are visible. For KNX version: When P002 ≠ 2 and P005 ≠ ON, P102 is visible. For standalone version: When P002 = 4, P102 is visible.
  • Page 147 Functions Control parameters Diagnostics and test Parameter Name Range Dependencies Diagnostics and test ‒ Application number 0 = (No application) 1 = 2-pipe 2 = 2-pipe with electric heater 3 = 2-pipe with radiator 4 = 4-pipe 5 = 2-pipe / 2-stage 6 = 4-pipe with electric heater 7 = 4-pipe / 2-stage (RDG2..KN) 8 = 4-pipe:6-port H/C...

  • Page 148: Supported Tools

    Supported tools 5 Supported tools Valid set of versions Product no. Supported tools PCT Go PCT Go Android Apple ≥13.0 ≥V1.11.5 ≥V1.11.5 Z, A ≥14.1 ≥V3.1.7 ≥V3.1.7 ≥14.1 ≥V3.1.7 ≥V3.1.7 Z, A ≥14.1 ≥V3.1.7 ≥V3.1.7 Z, A ≥14.1 ≥V7.1.0 ≥V7.1.0 ≥V7.1.0 ≥V7.1.0 Z, A...

  • Page 149: Setting Parameters In Ets

    Supported tools 5.1.1 Setting parameters in ETS 1 Open the project in ETS and select a device. 2 Click the Parameter tab, and adjust the control parameters as follows: A6V11545892_en--_e 149 | 186...
  • Page 150 Supported tools 3 Plant type (application), Control Sequence and other control parameters ([Pxx] description) can be downloaded. For more details on control parameters, see Control parameters [➙ 138]. ● Notes ETS version 4 or higher is used to assign communication objects to group addresses (S-Mode) ●...

  • Page 151: Acs Tool

    Supported tools ACS tool 5.2 ACS tool The ACS tool is used to commission the RDG2..KN KNX room thermostats (physical address, application, parameters). They can be operated or monitored by bus during normal operation. This section does not describe how to define the physical address and only provides a brief overview of ACS main function.

  • Page 152: Operation And Monitoring With Acs

    Supported tools ACS tool Some parameters in ACS have a range different from that on the room thermostats. The thermostat does not accept changes outside its range. This can be seen online in that a changed value returns to the original value. Note! Use the ranges described in the parameter tables in Control parameters [➙...
  • Page 153 Supported tools ACS tool Parameter settings in The ACS tool supports parameter settings even during normal operation. To change a control parameter, double-click the parameter in Standard popcard for the settings. ● Notes Make sure you are logged in with sufficient access right. ●...
  • Page 154 Supported tools ACS tool To start the application, select Applications ➙ Plant operation ➙ Standard diagram. The ACS tool provides standard plant diagrams for RDG2..KN room thermostats, depending on the following configuration: Plant type Application Application configuration configuration 2-pipe 2-pipe fan coil unit Radiator –...
  • Page 155 Supported tools ACS tool Plant type Application Application configuration configuration 2-pipe with electric 2-pipe fan coil unit with electric heater Single-stage with electric heater heater – Control sequence: No impact – Control sequence: No impact (P001 = any) (P001 = any) –...
  • Page 156 Supported tools ACS tool Plant type Application Application configuration configuration 2-pipe/2-stage 2-pipe/2-stage fan coil unit 2-pipe/2-stage heating or cooling – Control sequence: No impact (P001 = any) – Control sequence: No impact (P001 = any) – Fan operation: Enabled (P350 <> 0) –...

  • Page 157: Operation And Monitoring With Ozw772

    Supported tools ACS tool 5.2.3 Operation and monitoring with OZW772 HomeControl app for plant control The OZW772 web server allows users to operate a Synco HVAC system from a remote location – via a PC or from a smart phone using the HomeControl app. The start page displays the most important data points.

  • Page 158: Pct Go - Smartphone App

    PCT Go – Smartphone app 5.3 PCT Go – Smartphone app The Siemens smartphone app, Product Commissioning Tool (PCT Go) is a commissioning and service tool for RDG2.. thermostats. It supports all communicative and standalone models of the RDG200 series.

  • Page 159: Commissioning Parameter Via Pct Go

    Supported tools PCT Go – Smartphone app 5.3.1 Commissioning parameter via PCT Go Selecting "Commissioning" in the menu, PCT Go can: ● Read and write thermostat parameters ● Set the application (e.g. 2-pipe) ● Change settings (e.g. setpoints) ● Set KNX addressing (device address) (RDG2..KN) ●...

  • Page 160: Read Live Data Via Pct Go

    Supported tools PCT Go – Smartphone app 5.3.2 Read live data via PCT Go After installation, commissioning and power-on, installers can load the working data for the thermostat to the PCT Go via NFC, by selecting "Read live data". The information allows the installer to verify if the device operates in expected conditions and correctly wired.

  • Page 161: Connection

    Connection Connection terminals 6 Connection 6.1 Connection terminals RDG20.. RDG20..KN (AC 230 V / AC 24 V) RDG20..T (AC 230 V) L, N Operating voltage AC 230 V / AC 24 V Multifunctional input for temperature sensor (NTC 3k or LG- X1, X2, X3 Ni1000) or potential-free switch (function can be selected via parameter)
  • Page 162 Connection Connection terminals RDG26.. RDG26..KN RDG26..T G, G0 Operating voltage AC 24 V / DC 24 V Feed for relays AC 24…230 V X1, X2, X3 Multifunctional input for temperature sensor (NTC 3k or LG- Ni1000) or potential-free switch (function can be selected via parameter) Selectable input/output function: ●...

  • Page 163: Connection Diagrams

    Connection Connection diagrams 6.2 Connection diagrams Connection workflow: ● Select fan control type: DC, 1-speed or 3-speed fan ● Select application type, e.g. 4-pipe ● Columns V1, V2, V3, V4 show the output types (e.g. for 4-pipe: YH for heating and YC for cooling) as well the available control signals ●...
  • Page 164 Connection Connection diagrams DC 0…10 V fan RDG20..KN 1-speed/3-speed fan Application Equipment Terminals Terminals Q1, Q2, Q3 2-pipe 3-speed Control outputs: 2-pos ✓ ✓ 3-pos Application Equipment Terminals Terminals Q1, Q2, Q3 2-pipe + RAD 4-pipe 3-speed 2-pipe/2-stage YHC1 YHC2 Control outputs: 2-pos 2-pos...
  • Page 165 Connection Connection diagrams DC 0…10 V fan RDG26..KN 1-speed/3-speed fan Application Equipment Terminals Terminals Q1, Q2, Q3 2-pipe 3-speed Control outputs: ✓ ✓ On/Off Application Equipment Terminals Terminals Q1, Q2, Q3 2-pipe + RAD 4-pipe 2-pipe/2-stage 3-speed YHC1 YHC2 Control outputs: On/Off ✓...
  • Page 166 Connection Connection diagrams RDG26..KN Application 4-pipe with 6-port PICV DC 0…10 V fan 1-speed/3-speed fan Application 4-pipe with 6-port ball valve as changeover and PICV Room thermostat RDG26..KN 6-port modulating control actuator S1, S2, S3 Switch (keycard, window contact, presence PICV control valve 1-speed or 3-speed fan, DC 0…10 V fan detector etc.)

  • Page 167: Iaq - Co2 Connection Diagrams (Rdg2

    Connection IAQ - CO2 connection diagrams (RDG2..KN) 6.3 IAQ - CO2 connection diagrams (RDG2..KN) For all applications and equipment combination supporting the IAQ -CO function (see IAQ - CO2 monitoring and control (RDG2..KN) [➙ 69]), the fresh air damper (DC or On/Off) can be controlled via KNX S-Mode objects or directly connected to the thermostat as follows: ●...
  • Page 168 Connection Application examples Example 2: 2-pipe fan coil application for dehumidification, with DC 0...10 V fan and DC valve Dehumidifier, (without temperature setpoint shifting): DC 0...10 V fan + valve, No shifting setpoint Commissioning Outputs used ● ● P351 = 3 DC 0...10 V fan (or DIP6 = OFF) ●...
  • Page 169 Connection Application examples Example 4: 2-pipe fan coil application for dehumidification, with temperature setpoint shifting, Dehumidifier + dehumidifier contact, DC 0...10 V fan and DC valve, humidification is controlled by humidifier/DC 0...10 V release contact: Commissioning Outputs used ● ● P351 = 3 DC 0...10 V fan (or DIP6 = OFF)

  • Page 170: Relay Functions

    Connection Application examples 6.4.2 Relay functions Example 1: 2-pipe fan coil application, fan coil unit off during Protection mode. Switching off the fan coil Commissioning Outputs used unit ● ● P351 = 3 DC 0...10 V fan (or DIP6 = OFF) ●...
  • Page 171 Connection Application examples Example 3: Compressor application, with reversing valve (heating/cooling) and DC 0...10 V Compressor and fan: reversing valve Commissioning Outputs used ● ● Application 4-pipe DC 0...10 V fan ● ● Control output P201 = 4 (On/Off) Reversing valve ●...

  • Page 172: Swap Function And/Or Fan In The 2Nd Stage

    Connection Application examples 6.4.3 Swap function and/or fan in the 2nd stage Example 1: 2-pipe fan coil application for floor heating/cooling (2-stage heating/cooling), fan Fan in the 2 stage runs only in the 2 stage: Commissioning Outputs used ● ● P350 = 4 (2 stage) DC 0...10 V fan...
  • Page 173 Connection Application examples Example 2: 2-pipe and 2-stage application with radiant heating/cooling panels, the fan only Swap and fan in the 2 operates with the fan coil unit: stage ● Heating sequence: 1 panel and 2 fan coil unit ● Cooling sequence: 1 fan coil unit and 2 panel...
  • Page 174 Connection Application examples Example 3: 2-pipe fan coil and 2-stage application with different types of equipment (On/Off Swap and fan in the 2 control outputs), the fan only operates if output V1 is energized. stage Commissioning Outputs used ● ● P350 = 5 (Heating and DC 0...10 V fan (2 stage cooling)

  • Page 175: Iaq -Co2 Control (Rdg2

    Connection Application examples 6.4.4 IAQ -CO2 control (RDG2..KN) Example 1: 4-pipe heating and cooling fan coil system, for DC valves and fan, with IAQ IAQ monitoring indication (text) on the display: Commissioning Outputs used ● ● Application 4-pipe DC 0...10 V fan ●...
  • Page 176 Connection Application examples Example 3: 4-pipe heating and cooling fan coil system, power supply 230 V, for PWM valves IAQ control with On/Off and DC fan, CO indication (ppm) on the display, IAQ control via On/Off damper: damper Commissioning Outputs used ●...

  • Page 177: Technical Data

    Technical data 7 Technical data Power supply (RDG20..KN) AC 24 V ±20 % or Operating voltage (L-N) AC 230 V +10/-15 % (selectable via slider) Frequency 50/60 Hz Power consumption 4 VA @ AC 24 V, 7 VA @ AC 230 V ●...
  • Page 178 Technical data Outputs (RDG20..) Damper control (RDG204KN): DC (U1) SELV DC 0...10 V, ±1 mA On/Off (Q3/Y4) See Qx and Y4 Control outputs Solid state (triacs) Y1, Y2, Y3, Y4-N RDG20..KN AC 24 V or AC 230 V (linked to power supply) RDG20..T AC 230 V Yx power limitation...
  • Page 179 Technical data Outputs (RDG26..) Damper control (RDG264KN): DC (U1) SELV DC 0...10 V, ±1 mA On/Off (Q3) See Qx Multifunctional inputs X1-M/X2-M/U1-M (RDG20..KN)/X3-M (RDG20..T) Temperature sensor input Type NTC 3k Temperature range -20…70 °C Temperature sensor input Type LG-Ni1000 Temperature range -40…70 °C Digital input Operating action...
  • Page 180 Technical data Operational data 0…49 °C Measuring range Accuracy at 25 °C < ±0.5 K Temperature calibration range ±3 K Built-in humidity sensor 10…90 % Measuring range Accuracy (after calibration via P007) < 5 % Humidity calibration range ±10 % Built-in CO sensor (RDG2..KN) Measuring range...
  • Page 181 Technical data Standards and directives RCM conformity A5W00120121A Protection class II as per EN 60730 Pollution class Normal Degree of protection of housing IP30 as per EN 60529 Eco design and labeling directives Based on EU directive 813/2013 (Eco design directive) and 811/2013 (Labelling directive) concerning space heaters, combination heaters, the following classes apply:...
  • Page 182 700, 900 and RXB/RXL Basic documentation CM1Y9775 Desigo RXB integration – S-Mode Desigo (RDG2..KN) CM1Y9776 Desigo RXB/RXL integration – individual addressing CM1Y9777 Third-party integration CM1Y9778 Synco integration CM1Y9779 Working with ETS *) The documents can be downloaded from https://hit.sbt.siemens.com. 182 | 186 A6V11545892_en--_e...

  • Page 183: Dimensions

    Dimensions 8 Dimensions Dimensions in mm RDG2.. ARG200 A6V11545892_en--_e 183 | 186...

  • Page 184: Index

    Index Index Expert level parameters........137 External/return air temperature ......114 1-speed ..............109 External/return air temperature sensor .....49 3-position control signal........100 Fan in Auto mode ..........113 3-speed ..............109 Fan kick ............. 112 Fan minimum on- time ........112 Fan operation as per heating/cooling mode, or Absolute setpoint ..........
  • Page 185 Index KNX S-Mode ............. 117 KNX tools ............147 Scheduler ............5, 63 Sensor input............114 Setpoint Comfort mode ........98 Local time of day..........63 Setpoint Economy mode ........98 LTE-Mode ............120 Setpoint high ............60 Setpoint low ............60 Setpoint priority ..........
  • Page 186 Issued by Siemens Switzerland Ltd Smart Infrastructure Global Headquarters Theilerstrasse 1a CH-6300 Zug +41 58 724 2424 www.siemens.com/buildingtechnologies © Siemens 2020 Technical specifications and availability subject to change without notice. A6V11545892_en--_e...

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