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Ekinex 71 Series Applications Manual

Knx room temperature controller
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KNX Room Temperature controller
71 series EK-E72-TP

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  • Page 1 Application manual KNX Room Temperature controller 71 series EK-E72-TP...

  • Page 2: Table Of Contents

    Application manual KNX Room Temperature controller 71 series EK-E72-TP Index Foreword ................................6 1 General information ............................6 Function ..............................6 Main functional features ......................... 6 Technical data ............................7 Design ..............................7 Delivery ..............................8 Accessories ............................8 Marks and certification ........................... 8 2 Installation ..............................
  • Page 3 Application manual KNX Room Temperature controller 71 series EK-E72-TP Temperature control ..........................34 7.8.1 Settings ............................34 7.8.1.1 Parameter and communication object tables ............34 7.8.1.2 Heating/cooling switchover ..................37 7.8.1.3 Valve protection function ................... 38 7.8.1.4 Remote Setpoint modification ................... 38 7.8.1.5...
  • Page 4 Application manual KNX Room Temperature controller 71 series EK-E72-TP Two-point control with hysteresis ......................74 Continuous Proportional-Integral control ..................... 76 PWM Proportional-Integral controll ...................... 77 Fan-coils with On / Off fan speed control ..................... 79 Fan coil with fan speed continuous control ..................81 2-point control with hysteresis for auxiliary heating / cooling system ..........
  • Page 5 Heating/cooling status out and Heating/cooling status in communication objects (more enhanced management) 1.00 Emission 10/03/2016 The latest revision of the application manual is available at www.ekinex.com. For previous revisions, contact the technical support at support@ekinex.com. Release 3.00 - Updating: 20/03/2017 Application Manual © SBS S.p.A. - All rights reserved...

  • Page 6: Foreword

    KNX Room Temperature controller 71 series EK-E72-TP Foreword ® The present document describes the ekinex KNX room temperature controller with LCD display 71 series version EK-E72-TP. 1 General information The device described in the present document works as an electronic digital temperature controller for a room or a zone (consisting e.g.

  • Page 7: Technical Data

    Application manual KNX Room Temperature controller 71 series EK-E72-TP • anticondensation protection for floor and ceiling cooling radiant panels; • antistratification function; • delayed fan start (“hot-start” function) time-scheduled or depending on the conveying fluid temperature measured at the coil battery;...

  • Page 8: Delivery

    Accessories of the device: set of rockers and frames 1.7 Marks and certification The KNX mark on the ekinex device ensures interoperability with the KNX devices of SBS and other manufacturers installed on the same system bus system. The compliance with the applicable European directives is indicated by the presence of the CE mark.

  • Page 9: Installation

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 2 Installation The device has degree of protection IP20, and is therefore suitable for use in dry interior rooms. The installation of the device requires the following steps: a) fix the metallic support with the screws supplied on a wall box with suitable fixing holes. It is recommended to install the device at a height of 150 cm;...

  • Page 10: Connection

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 2.1 Connection For the operation the device has to be connected to the bus line and addressed, configured and commissioned with ETS (Engineering Tool Software). Connection of the bus line The connection of the KNX bus line is made with the terminal block (red/black) included in delivery and inserted into the slot of the housing.

  • Page 11: Configuration And Commissioning

    ETS4 (or later releases) and the ekinex APEKE72TP##.knxprod (## = release) application program that can be downloaded from the website www.ekinex.com. The application program allows the configuration of all working parameters for the device. The device-specific application program has to be loaded into ETS or, as ®...

  • Page 12: Tree Structure Of The Application Program

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 3.1.1 Tree structure of the application program At its opening, the tree structure of the program includes the following main items: About EK-E72-TP General Temperature sensor External sensors (from bus) LCD Display...

  • Page 13: Commissioning

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 3.2 Commissioning For the commissioning the device is provided on the front side (in the area usually occupied by the rockers) • a red LED (1) for indication of the active operating mode (LED on = programming, LED off = normal operation);...
  • Page 14 Application manual KNX Room Temperature controller 71 series EK-E72-TP the firmware release (F). To scroll through the three elements of the physical address press + or –. For example: Example of displaying the physical address 10.5.43 (device nr. 43, installed on the line 5 of the area 10) and the firmware release 001 To exit from the physical address displaying press shortly (<...

  • Page 15: User Interface

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 4 User interface The user interface of the room temperature controller includes a LCD display and 4 capacitive touch pushbuttons located near the angles of the plastic case. User interface: LCD display (1), toch buttons (2) The symbols on the rockers recall the function carried out: temperature or fan speed increase;...
  • Page 16 Application manual KNX Room Temperature controller 71 series EK-E72-TP  operating mode (comfort / standby / economy / building protection);  seasonal mode (heating / cooling);  device status calling / not calling (or setpoint reached / not reached); ...

  • Page 17: Segment Test

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 4.1.2 Segment test The segment test allows you to check at any time the proper functionality of the display. In order to do the test, press simultaneously + (plus) on the upper-right side and the symbol  on the lower-left side for more than 3 seconds.

  • Page 18: Temperature Sensor

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 5 Temperature sensor The integrated temperature sensor allows the measureming of the room temperature in the range from 0 °C to +40 °C with a resolution of 0.1 °C. To keep into account significant environmental interferences such as...

  • Page 19: Input Variables

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 6 Input variables The data that the device usesin its control algorithms and /or to be displayed may come from: • the internal sensors; • the KNX bus through standard Communication Objects.

  • Page 20: Application Program For Ets

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7 Application program for ETS In the following chapters there is the list of folder, parameters and communication objects of the application program. Some specific functions of the thermostat are described in more detail in the dedicated paragraphs.

  • Page 21: About Ek-E72-Tp

    The information given © Copyright SBS S.p.A. 2016 Application software for ETS4 Version 2.00 (or later) KNX room temperature controller with LCD display 71 series SBS S.p.A. Via Circonvallazione s/n I-28010 Miasino (NO) Italy www.ekinex.com info@ekinex.com...
  • Page 22 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values recalled using the rockers. Time to exit change without saving [other values in the range 2 s … 12 s] Time interval without further pressing of the rockers at the end of which the device exits the procedure without saving the current changes.

  • Page 23: Operating Mode Management

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.2.2 Operating mode management In EK-E72-TP room thermostat, operating modes and corresponding comfort attenuations can be customized according to the intended use of the building where the device is installed. 3 different operating modes are available;...

  • Page 24: Parameter And Communication Objects Tables

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.3 Temperature sensor The Temperature sensor folder includes the following parameters:  Sensor enabling  Filter type  Temperature offset  Minimum change of value to send [K]  Cyclic sending interval ...
  • Page 25 Application manual KNX Room Temperature controller 71 series EK-E72-TP Comm. Object name Conditions Dim. Flags Obj. No. [9.001] Temperature value Temperature sensor = enabled 2 Bytes CR-T-- temperature (°C) Temperature sensor = enabled, Temperature threshold1 - Switch 1 Bit CR-T-- [1.001] switch...

  • Page 26: External Sensors (From Bus)

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.4 External sensors (from bus) As “external sensors” are intended KNX-devices (or conventional sensors interfaced to the bus through KNX devices) which send states or values to the room temperature controller via the bus. Enabling an external sensor, without connecting the corresponding communication object, generates a permanent alarm on the display and suspends the thermoregulation function.
  • Page 27 Application manual KNX Room Temperature controller 71 series EK-E72-TP disabled / enabled Outdoor temperature It enables an outdoor temperature bus sensor to display the measured value on the display. This is alternative to an outdoor temperature sensor connected to a device input: the parameter appears only if the external temperature sensor is disabled in the Inputs folder.
  • Page 28 Application manual KNX Room Temperature controller 71 series EK-E72-TP no reading [other values in the range 30 s … 120 Cyclic reading interval Window contact 1= enabled min] Window contact 2 disabled / enabled It enables a bus sensor for detecting the state of opening / closing of a window or a door.
  • Page 29 Application manual KNX Room Temperature controller 71 series EK-E72-TP Comm. Obj. Object name Conditions Dim. Flags Humidity comm. obj. size = 2 byte Relative humidity sensor = [5.001] enabled, Humidity (1 byte, from bus) 1 Byte percentage C-W--- Humidity comm. obj. size = (0..100%)

  • Page 30: Weighted Temperature Value

    The device allows the acquisition of the room temperature in two ways: 1) from the temperature sensor integrated in the device; 2) via bus from another KNX device, e.g. from an ekinex pushbutton (External sensors (from bus)  Room temperature = enabled);...

  • Page 31: Lcd Display

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.6 LCD display The folder LCD display includes the following parameters:  Backlight intensity  Automatic backlight dimming  Visualisation type  Time before energy saving mode  Backlight when in energy saving mode ...
  • Page 32 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values 10 s / 15 s / 30 s Energy saving = enabled Time before energy saving mode 45 s / 1 min off / 2% / 5% / 10% /...

  • Page 33: Leds Intensity

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.7 Leds intensity The capacitive touch buttons used to interact with the thermostat functions are arranged in 4 areas corresponding to the LCD angles. Each touch button has its own backlight led to make the identification of each associated function easier.

  • Page 34: Temperature Control

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.8 Temperature control The Temperature control folder includes the following secondary folders:  Settings  Heating  Cooling  Ventilation  Scenes The Cooling and Ventilation secondary folders appear only if in the Settings folder the parameter Thermostat function is set to the value both heating and cooling or cooling.
  • Page 35 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values no sending [other values in the range 30 s … 120 Setpoint cyclic sending interval min] The setpoint value that can be sent cyclically is the actual one, depending on the operating mode set manually by the user or automatically by another KNX supervising device with the possibility of time scheduling.
  • Page 36 Application manual KNX Room Temperature controller 71 series EK-E72-TP Comm. Object name Conditions Dim. Flags Obj. Heating/cooling status out Always visible 1 Bit CR-T-- [1.100] heating/cooling The communication object is updated on the bus on event of change internally elaborated by the controller.

  • Page 37: Heating/Cooling Switchover

    Application manual KNX Room Temperature controller 71 series EK-E72-TP • radiant panels + fancoils (as auxiliary system); • radiant panels + dehumidification units. 7.8.1.2 Heating/cooling switchover The switchover between the two seasonal modes (heating / cooling) may happens as follows: 1) manually on the device by the end user;...

  • Page 38: Valve Protection Function

    Application manual KNX Room Temperature controller 71 series EK-E72-TP Switch-over via KNX bus (mode 3) The switch-over from the bus requires that the command is received from another KNX device, e.g. another room temperature controller or a Touch&See unit configured to this purpose. The other device works in this way as a “supervisor”...

  • Page 39: Remote Operative Mode Modification

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 28 – Manual setpoint [9.001 temperature] 27 – Actual setpoint [9.001 temperature] 50 – Manual/forced setpoint active status [1.011 state] Those objects are about the Setpoint forced modification (symbol M on the LCD display): alternatively, the supervisor can act directly on the operating mode setpoints (C.O.

  • Page 40: Heating

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.8.2 Heating The Heating folder includes the following parameters:  Comfort temp. setpoint [°C]  Standby temperature setpoint [°C]  Economy temp. setpoint [°C]  Building protection temp. setpoint [°C] ...
  • Page 41 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values radiators electric Heating type fan-coils floor radiant panels ceiling radiant panels It defines the terminal used for the thermal exchange in the room. The choice affects the parameters of the PWM control algorithm (Proportional band and Integral time) and the control options.
  • Page 42 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values 85 [range 70 … 100] Max control value [%] Control type = continuous or PWM Heating type = floor radiant panels, External sensors  Floor surface Floor temperature limitation...
  • Page 43 Application manual KNX Room Temperature controller 71 series EK-E72-TP Comm. Object name Conditions Dim. Flags Obj. Economy setpoint (heating) 2 Byte CRWTU- [9.001] temperature (°C) Building protection setpoint 2 Byte CRWTU- [9.001] temperature (°C) (heating) Control type = 2 points...
  • Page 44 Application manual KNX Room Temperature controller 71 series EK-E72-TP The floor heating system (electrically powered version) involves the laying under the floor coating of an electric cable powered by the mains voltage (230 V) or low voltage (for example 12 or 45 V), possibly already prepared in the form of rolls with constant distance between sections of cable.

  • Page 45: Cooling

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.8.3 Cooling The Cooling folder includes the following parameters:  Comfort temp. setpoint [°C]  Standby temperature setpoint [°C]  Economy temp. setpoint [°C]  Building protection temp. setpoint [°C] ...
  • Page 46 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values 0,3 K Hysteresis Control type = 2 point hysteresis [other values in the range 0,2 K … 3 K] Heating type = floor radiant panels, Hysteresis position...
  • Page 47 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values Cooling type = floor radiant panels or ceiling radiant panels, disabled External sensors (from bus)  Flow enabled (project temperature) temperature sensor = enabled Active anticondensation Cooling type = floor radiant panels or...
  • Page 48 Application manual KNX Room Temperature controller 71 series EK-E72-TP Comm. Object name Conditions Dim. Flags Obj. Control type = Cooling out command 1 Byte CR-T-- [5.001] percentage (0..100%) continuous Auxiliary cooling = Auxiliary cooling output 1 Bit CR-T-- [1.001] switch...
  • Page 49 Application manual KNX Room Temperature controller 71 series EK-E72-TP Active Anticondensation protection Software protection that foresees the sending on the bus of the dew-point with dew-point temperature temperature calculated by the room thermostat using temperature and relative sending over the bus and...

  • Page 50: Main And Auxiliary Ventilation

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.8.4 Main and auxiliary ventilation The Ventilation folder includes the following parameters:  Ventilation function  Control type  Threshold first speed [0,1 K]  Threshold second speed [0,1 K] ...
  • Page 51 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values Threshold third speed [0,1 K] Control type = 3 speeds [range 0 … 255] The value is represented in tenths of Kelvin degrees. If the parameter Thermostat function = both heating and cooling, the threshold value is valid for both seasonal modes.
  • Page 52 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values not inverted Disable ventilation from bus = Signal from bus inverted [other values in the range 10 s … Fan start delay 12 min] It appears also if the hot-start function is active (through measuring of the conveying fluid temperature at the battery for the thermal exchange).

  • Page 53: Delayed Fan Start ("Hot-Start")

    Application manual KNX Room Temperature controller 71 series EK-E72-TP Delayed fan start (“hot-start”) 7.8.4.2 This function is used in case the fan forces in the room air passing through a heat exchange coil (as in the case of the terminals to the fan-coil). In the heating mode of operation, to avoid possible discomfort caused by the dispatch of cold air in the room, the room temperature controller does not start the fan until the fluid has not reached a sufficiently high temperature.

  • Page 54: Remote Fan Speed Modification

    Application manual KNX Room Temperature controller 71 series EK-E72-TP  a radiator system that has a fan-coil as auxiliary stage for heating; the same fan coil unit functions as main stage for cooling. In these cases with the configuration adopted, the following steps are necessary: 1.
  • Page 55 Application manual KNX Room Temperature controller 71 series EK-E72-TP  = 0: OFF  = 1: speed 1  = 2: speed 2 (if Control Type > 1 speed)  = 3: speed 3 (if Control Type > 2 speed) If Control Type parameter in Ventilation folder is = continuous regulation, the values of the C.O.s with DPT...

  • Page 56: Scenes

    The folder allows the scenes configuration (up to 8), assigning to each one an identification number and the operating mode to be activated when recalled (e.g. with an ekinex pushbutton or another KNX device with this function). If Learning mode = enabled, receiving a telegram of scene storage determines the association of the scene to the operating mode currently set on the Touch&See unit.
  • Page 57 Application manual KNX Room Temperature controller 71 series EK-E72-TP Nome oggetto Condizioni Dim. Flags N° Ogg. Com. [17.001] scene number HVAC scene number 1 Byte C-W--- [18.001] scene control It stores or recalls a scenario. The six least significant bits (0 to 5) in the byte of the code represent the number of the scene, while the most significant bit (7) is the operation code (1 = stores, 0 = recalls).

  • Page 58: Relative Humidity Control

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.9 Relative humidity control The Relative humidity control folder includes the following secondary folders:  Dehumidification  Humidification The secondary folders Dehumidification and Humidification appear if at a humidity sensor is enabled.
  • Page 59 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values Thermostat function = both heating and cooling, Temperature control  cooling  cooling type = floor radiant panels or ceiling radiant panels, Relative humidity  dehumidification  dehumidification function = cooling...
  • Page 60 Application manual KNX Room Temperature controller 71 series EK-E72-TP Comm. Obj. Object name Conditions Dim. Flags function = both heating and cooling, Temperature control  cooling  cooling type = floor radiant panels or ceiling radiant panels, Relative humidity  dehumidification ...

  • Page 61: Humidification

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.9.2 Humidification The secondary folder Humidification includes the following parameters:  Operating modes where humidification is active  Relative humidity setpoint for humidification control [%]  Dehumidification control hysteresis [%] ...

  • Page 62: Comfort

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.10 Comfort The Comfort folder includes the following secondary folders:  Comfort area  Calculated psychrometric values The secondary folders Comfort area and Calculated psychrometric values appear if the relative humidity sensor is enabled.

  • Page 63: Calculated Psychrometric Values

    Application manual KNX Room Temperature controller 71 series EK-E72-TP Comm. Object name Conditions Dim. Flags Obj. No. comfort area. Note about comfort area It is possible to verify if the measured temperature and relative humidity values are inside or ouside a comfort area defined by the corresponding parameters, and then send the relative signal on the bus.
  • Page 64 Application manual KNX Room Temperature controller 71 series EK-E72-TP Parameter name Conditions Values Perceived temperature [°C] disabled / enabled Calculation of this value is based on Humidex index. The correlation is significative for temperature values between 20 and 55°C. no sending [other values in the range 30 s …...

  • Page 65: Energy Saving

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.11 Energy saving In order to realize energy-saving functions, window contacts (to detect the opening of windows or doors), presence and movement sensors and card holders can be used. The Energy saving folder includes the following secondary folders: ...

  • Page 66: Presence Sensors

    Absence time to switch HVAC mode For this function only use external sensors (from bus) can be used, such as the ekinex EK-SM2-TP movement sensor or the ekinex EK-DX2-TP (X = B, C, D, E) presence sensor. The following condition has to be true: External sensors (from bus) ...

  • Page 67: Card Holder

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 7.11.3 Card holder The Card holder secondary folder appears only if the corresponding sensor is enabled i.e. if the following condition is true: External sensors (from bus)  Card holder contact = enabled The Card holder folder includes the following parameters: ...
  • Page 68 Application manual KNX Room Temperature controller 71 series EK-E72-TP to be defined with the hotel responsible in accordance with the target of energy saving and level of service to be offered to the guests. Conventional (not KNX) card holder With a conventional card holder the status (card present or absent) of a signal contact is detected through an input of the device configured as [DI] card holder contact sensor.

  • Page 69: Logic Functions

    KNX Room Temperature controller 71 series EK-E72-TP 7.12 Logic functions The EK-E72-TP KNX room thermostat (71 series) allows to use some useful logic functions (AND, OR, NOT and exclusive OR) in order to implement complex functions in the building automation system.
  • Page 70 Application manual KNX Room Temperature controller 71 series EK-E72-TP Object name Conditions Dim. Flags Comm. Obj. No. Logic function X = enabled 77, 82, 87, 92, Logic function X – Input 1 1 Bit C-W-- [1.001] switch 97, 102, 107, 112...

  • Page 71: List Of Communication Objects

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 8 List of communication objects Name Size Flags Datapoint type Technical alarm 1 Bit -WC--- [1.5] DPT_Alarm Temperature value 2 Byte R-CT-- [9.1] DPT_Value_Temp Temperature threshold 1 - Switch 1 Bit R-CT-- [1.1] DPT_Switch...
  • Page 72 Application manual KNX Room Temperature controller 71 series EK-E72-TP Name Size Flags Datapoint type Heating and cooling out command 1 Byte R-CT-- [5.1] DPT_Scaling Cooling out command 1 Bit R-CT-- [1.1] DPT_Switch Cooling out command 1 Byte R-CT-- [5.1] DPT_Scaling...
  • Page 73 Application manual KNX Room Temperature controller 71 series EK-E72-TP Name Size Flags Datapoint type 77, 82, 87, 92, Logic function X – Input 1 1 Bit -WC--- [1.1] DPT_Switch 97, 102, 107, 112 78, 83, 88, 93, Logic function X – Input 2...

  • Page 74: Control Algorithms

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 9 Control algorithms In figura sono rappresentati i componenti di un generico sistema di controllo per la temperatura ambiente. Il termostato rileva il valore attuale di temperatura della massa d’aria ambiente (T...
  • Page 75 Application manual KNX Room Temperature controller 71 series EK-E72-TP – ΔT Heating mode: when the measured temperature is lower than the value of the difference (T hysteresis whereby ΔT identifies the differential adjustment of the boilers, the device activates the heating system hysteresis by sending a message or KNX telegram to the actuator that handles the heating system;...

  • Page 76: Continuous Proportional-Integral Control

    Application manual KNX Room Temperature controller 71 series EK-E72-TP In the ETS application program, two different parameters are available for the hysteresis value for heating and cooling: the values usually differ depending on the system type and its inertia. In the ETS application program, the default 2-point hysteresis control algorithm foresees inferior hysteresis for heating and superior for cooling.

  • Page 77: Pwm Proportional-Integral Controll

    Application manual KNX Room Temperature controller 71 series EK-E72-TP Wide Proportional Band 100% Narrow Proportional Band T ambient [°C] T Setpoint Wide Proportional Band 100% Narrow Proportional Band T ambiente [°C] T Setpoint Integral Time is the amount of time necessary to repeat the vaue of the control variable of a purely proportional controller, when error is constant.
  • Page 78 Application manual KNX Room Temperature controller 71 series EK-E72-TP Cycle period T ON T OFF Time [min] T ON = T OFF Mean ON time = 50% Time [min] T ON = ½ T OFF Mean ON time = 25%...

  • Page 79: Fan-Coils With On / Off Fan Speed Control

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 9.4 Fan-coils with On / Off fan speed control The multi-stage fan control is similar to the 2-point control with hysteresis described in the previous section. The speed of the fan is chosen basing on the difference between the set point (T...
  • Page 80 Application manual KNX Room Temperature controller 71 series EK-E72-TP The parameter Speed control hysteresis in ETS application program represents the hysteresis value which is common to all speed stages and unified for heating and cooling. As for the intercept valve of the water exchange coil (2-pipe system) or the intercept valve of the water heating coil (4-pipe system), a 2-point hysteresis algorithm can be used in the application program, operating –...

  • Page 81: Fan Coil With Fan Speed Continuous Control

    Application manual KNX Room Temperature controller 71 series EK-E72-TP The communication between the controller and the actuator can be realized both with communication objects [1.1] DPT_Switch (168-169-170, Fan speed 1-2-3) or with a single object [5.1] DPT_Scaling (167, continuous fan speed). The object (167, continuous fan speed), with ON/OFF fan coil speed control, does not change continuously but gets discrete values according to the hysteresis of the ON/OFF windows, as shown in the following table.
  • Page 82 Application manual KNX Room Temperature controller 71 series EK-E72-TP The 1-byte communication object Continuous fan speed (167) changes continuously according to the curve shown in figure. Please refer to the previous paragraph to evaluate differences with the 1-2-3-speed control, where the same communication object has discrete values.

  • Page 83: Point Control With Hysteresis For Auxiliary Heating / Cooling System

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 9.6 2-point control with hysteresis for auxiliary heating / cooling system Some heating / cooling systems show a very large response inertia; this is mostly due to the fact that a relevant part of building mass is involved in the thermal exchange.

  • Page 84: Auxiliaty Stage With Fan Coil

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 9.7 Auxiliaty stage with fan coil In some heating / cooling system, an auxiliary fan coil system which operates on air volumes is paired with an high inertial system (such as floor radiant panels): EK-E72-TP thermostats can be easily configured for this kind of application.

  • Page 85: Diagnostics

    Application manual KNX Room Temperature controller 71 series EK-E72-TP 10 Diagnostics Alarm code Cause Surface temperature limit is exceeded Formation of condensation Thermal generator lock Alarm 1 (from bus) Alarm 2 (from bus) Alarm 3 (from bus) Alarm 4 (from bus)

  • Page 86: Warnings

    12 Other information • The instruction sheet must be delivered to the end customer with the project documentation ® • For further information on the product, please contactthe ekinex technical support at the e-mail address: support@ekinex.com or visit the website www.ekinex.com ®...

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