ABB 2CSYK1201C Product Manual Download | Manualshive

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72 Planning and use

| MYLOS

®

Building Automation

MYLOS

®

Building Automation

Planning and use

Xp=Proportionalbereich

Xp = 8 K
Xp = 6 K

Xp = 4 K

Xp=2 K

100%

0%

T

15°C

25°C

21°C

T

21 °C

Sollwert
Istwert

Wendepunkt

t

Tu

Tn = 3 * Tu

Tu = Verzugszeit
Tn = Nachstellzeit

7.3.5 Control parameters with PWM and continuous controller (fan coil)

With continuous control behaviour and switching PWM controllers the preset control parameters can be used via the
installation type of the heating or air-conditioning system. If different parameters are required, they are set by free
parametrisation. Free parametrisation should only be used if the user has sufficient experience in control technology.

The setting “free parametrisation” can be used to set the “proportional range (Xp)” and the “readjust time (Tn)”. The
proportional range is above and below the specified setpoint and determines the speed of the control.
The readjust time is three times the delay time (the delay time is determined by the inflectional tangent of the heating
curve of the room. With both settings the slower the overall system the greater the values required.

7.3.6 Two-stage heating and cooling

In specific instances such as when using underfloor heating, it may be necessary to install a quick additional stage
for the heat control in order to warm up the room rapidly. When the room thermostat is pre-set to “supplementary-
stage heating enabled”, it has a second heating system with switching control (1-bit) or a “quasi-continuous” control,
which is controlled with the 1-byte values 0% and 100%.
The parameters “gap of additional stage” and “Hysteresis (one-sided)” enable you to specify when the additional
stage switches on and off.
For example, if the setpoint is 18 °C and the hysteresis 0.5 K (one-sided) for the additional stage, the controller
switches on at 18 °C and off at 18.5 °C.
The same settings as for the additional stage heating also apply for the additional stage cooling, except that for
cooling an additional cooling stage is activated if an adjustable temperature is exceeded to cool the room faster.

Because some actuators close (open without power) at a 1-bit value of “1” or a 1-byte value of “255” and open at

“0”, the direction of the control value can be changed with “invert control value”.

7.4

Setpoints

The ambient temperature controller can be operated with dependent or individual setpoints. The two options are
explained in more detail below.

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Summary of Contents for 2CSYK1201C

Page 1: ...Mylos KNX Programmable Thermostat 2CSYK1201C S Product manual ...

Page 2: ...mote thermostat management 17 5 Event management 18 5 1 Activating an event 18 5 2 Time function management 18 6 Commissioning 20 6 1 Parameters 20 6 1 1 Parameter window General 20 6 1 2 Parameter window Temperature measurement 22 6 1 3 Parameter window Controller general 24 6 1 4 Parameter window Heating control 26 6 1 5 Parameter window Controller PWM heating 28 6 1 14 Remote Thermostat Paramet...

Page 3: ...tions 62 6 4 Special operating states 63 7 Planning and use 64 7 1 Operating mode 64 7 1 1 Operating mode switching 1 bit 64 7 1 2 Operating mode switching 1 byte 64 7 2 Temperature measurement 65 7 2 1 Internal temperature recording 65 7 3 Controller 66 7 3 1 2 point controller 67 7 3 2 Continuous controller 68 7 3 3 PWM controller 69 7 3 4 Fan Coil 71 7 3 5 Control parameters with PWM and contin...

Page 4: ...ws you to set a temperature and for how long it must be kept Upon expiration the system goes back to the automatic operating mode HOLIDAY It allows you to set a date hour and the temperature that must be kept during holiday Upon expiration the system goes back to automatic operation CHRONO It allows you to set different temperature levels throughout the day EVENTS It allows you to set a c o m m a ...

Page 5: ...trol and display elements LCD display The LCD can be lighted if required Use the Lighting Display parameter This allows the LCD lighting to be always on or always off or to be lighted after pushing a switch and remain on for 5 seconds fan stage adjustment When the switch is pressed the device runs through the sequence 1 2 3 Auto 0 1 starting from the current fan stage If the fan is set to automati...

Page 6: ...ameters during commissioning However the complete application program can be reloaded if required A longer downtime may result if the application program is changed or after a discharge Assignment of the physical address The assignment and programming of the physical address is carried out in the ETS The device features a Programming button for assignment of the physical device address The red Pro...

Page 7: ...Technical features 7 MYLOS Building Automation Technical features 44 43 30 20 44 2 2 Connection diagram Connection diagram of the programmable thermostat 2 3 Dimensional drawing Dimensional drawing of the programmable thermostat ...

Page 8: ...ssential for good temperature detection The ambient temperature controller should be installed approximately 150 cm above the floor and 50 cm from the door frame The ambient temperature controller should be installed on a wall opposite the radiator The radiator and the ambient temperature controller must not be separated by corners in the room An ambient temperature controller should not be instal...

Page 9: ...tion of electrical systems must be observed The device must be protected from moisture dirt and damage during transport storage and operation The device must be operated in accordance with the specified technical data only Supplied state The device is supplied with the physical address 1 0 1 Application program group addresses and parameters must be loaded during commissioning Assignment of the ph...

Page 10: ... 1 Navigation among the menus The navigation among menus occurs pressing the 4 push buttons on the front side of the programming Programmable Thermostat Each button operation which is displayed in the lower part of the display changes depending on the current menu The remaining part of the display shows the information relating to the currently active menu 1 Display area 2 Indication of key functi...

Page 11: ...ure can be restored quickly when necessary Standby mode cooling the ambient temperature is increased e g during temporary absence to save heating costs The comfort temperature can be restored quickly when necessary SYSTEM OFF all temperature regulation functions are disabled MANUAL OPERATION the setpoint temperature that has been set manually is kept Once the desired function has been selected wai...

Page 12: ...rature for the indicated period In this menu the display shows the following functions Exit To go back to the previous menu 1 0 To modify the selected value 2 3 To move between duration and setpoint temperature OK To confirm the settings The display shows PARTY OPERATION as a confirmation of program execution After the set time the system goes back to automatic operation With the active PARTY menu...

Page 13: ...oes back to automatic operation With the HOLIDAY menu active it is possible to carry out the following functions pressing one of the front push buttons Exit to cancel party operation 1 0 to modify setpoint temperature without having to access the menu again 3 3 3 Chrono Menu It allows you to set system language date and hour as well as a number of functions that are described in detail in chapter ...

Page 14: ... move among the fields and confirm using OK 3 3 4 Events menu The Events function allows you to logically combine the input channels with a temporal programming to control groups or to recall a SCENE This menu shows the following functions Exit To go back to the previous menu 1 To scroll the menu down and select the program to be customised 0 OK To confirm the selected item You can customise up to...

Page 15: ... 1 CUSTOMISE Menu It allows you to customise the temporal programs 1 select CUSTOMISE and press OK 2 select for example USER 1 and press OK 3 with the arrows 0 1 select the day that you wish to customise ex MONDAY and press OK 4 select MODIFY and press OK The display shows the graph representing the temporal course of setpoint temperature levels during the day In the upper part the day and hour in...

Page 16: ...al program it should be associated with 1 select SELECT and press OK 2 select LOCAL to use the thermostat you are adjusting or REMOTE A B C to adjust possible thermostats located in other rooms then press OK The following description applies to both LOCAL and REMOTE sub menus 3 choose among the possible temporal programs displayed and press OK FIXED 1 2 3 they are preset temporal courses that cann...

Page 17: ...asurement for temperature 4 2 Remote thermostat management The Programmable Thermostat can manage up to 3 groups of remote thermostats in as many zones The thermostat which is remoted for example in the bedroom receives switching on off commands and the temperature level it should reach from the Programmable Thermostat SUMMER WINTER CELSIUS FAHRENHEIT HYSTERESIS ADJUSTMENT MODE Exit 0 1 OK CELSIUS...

Page 18: ...ivating an event The first operation to be performed is enabling a program or not 1 Select a program ex PROGRAM 1 and press OK 2 Select ENABLED and press OK 3 Select ON to enable it the symbol indicates that the function is active 4 Press EXIT to go back to the previous menu 5 2 Time function management Through the TIME function in logic AND with the inputs if enabled it is possible to enable a te...

Page 19: ...in which the event can be activated or deactivated ex 02 00 02 00 3 4 it allows you to select the ON or OFF status 8 use the arrows to move forward on the temporal axes and set the status course for the whole day 9 exit and save the display shows the window for temporal course of PROGRAM 1 MONDAY It is now possible to manually set another day or to copy it from an existing day 1 with the arrows 0 ...

Page 20: ...age can be monitored by an external device The following parameters are shown transmission period in s 1 65 535 Options 1 60 65 535 The period at which the In operation object sends a message periodically is set here Enable switchover of temperature display via button C F Options Celsius Fahrenheit This parameter enables the C F push switch The user can then switch the temperature display from C t...

Page 21: ...1 bit switching operating mode the Comfort operating mode is activated If an OFF message is received Standby mode is activated If an ON message is received by the Night Mode object night operating mode is activated An OFF message deactivates Night Mode Freezing Heat Protection mode is also activated with an ON message and deactivated with an OFF message If an ON message is received by multiple obj...

Page 22: ...ecorded internally it may be falsified by an additional internal heat source e g bus or network coupler The falsified value can be adjusted with the setting calibration value for ambient temperature measurement Setpoint larger when sending change Options Inactive 0 1 K 0 2 K 0 3 K 0 4 K 0 5 K 0 6 K 0 7 K 0 8 K 0 9 K 1 0 K If this parameter is set to a difference the associated 2 byte communication...

Page 23: ... be sent cyclically independent of a change the parameter Send setpoint cyclic must be set to a time This may be necessary for instance with a higher level boiler that expects to receive setpoints and current values within a certain time period If values are not received a predefined supply line temperature is set that is no longer oriented on actual demand ...

Page 24: ...nction are shown This setting is only shown if the operating mode of the device is set to normal mode with control function Switchover between heating and cooling Options Automatic Automatic and send Exterior You can switch between heating and cooling automatically in the room thermostat To do so select the Automatic option This ensures that the room thermostat checks the configured setpoints for ...

Page 25: ... cool If the Thermostat functions parameter has been selected it can be used to specify whether a separate communication object or a common communication object for heating or cooling is provided for the control value The setting 1 channel dual pipe system for heat cool is required for dual pipe systems and the setting 2 channels four pipe system for heat cool is required for four pipe systems ...

Page 26: ...e if the Heating or Heat and cool control functions are set Cycle time heating control value sending 0 inactive min Options 0 1 60 The room thermostat can send the control value even if the value remains unchanged This is often required since the connected actuator otherwise assumes that the room thermostat is no longer available This enables the actuator to activate its force position control whi...

Page 27: ...steresis is 1 K the room thermostat only sends an on signal at 21 5 C and an off signal at 20 5 C This parameter is only available if 2 step control is set as the control type Invert heating Options Yes No Invert heating is used to adjust the direction of control action of the control value to de energised open or de energised closed valves This parameter is only available if 2 step control is set...

Page 28: ...alue min Options 1 2 10 60 With PWM control the actuator switches the valve drive depending on the control value The control thereby checks the Cyclic time of the PWM control value Example for a cyclic time of 10 min and a control value of 60 the valve gear is switched on for 6 min and off for 4 min Basically the following applies for cyclic time the more inactive the entire system the higher the ...

Page 29: ...authorisation This parameter is only available if the Heating or Heat and cool control functions are used and the heating control type is set to PWM Percentuale massima per il disinserimento della tensione alla valvola termoelettrica Options 70 75 90 100 If the control value is very large for PWM control the switch off period for the actuator might not be sufficient to put in motion the connected ...

Page 30: ...the additional stage carries out a continuous control 1 bit via a 1 bit communication object e g an electric drive or an actuator with integrated pulse width modulation This parameter is only available if the Heating or Heat and cool control functions are used Invert control value Options Yes No Invert heating is used to adjust the direction of control action of the control value to de energised o...

Page 31: ... activate position check Cycle time for the automatic sending can be set Cyclic sending can also be disabled This parameter is only available if the Heating or Heat and cool control functions are used Additional control value interval 0 127 x0 1 C Options 0 30 127 Temperature range 0 127 corresponds to 0C 12 7C The parameter allows you to specify the additional heating stage setpoint The setpoint ...

Page 32: ... the additional stage carries out a continuous control 1 bit via a 1 bit communication object e g an electric drive or an actuator with integrated pulse width modulation This parameter is only available if the Cooling or Heat and cool control functions are used Invert control value Options Yes No The control value is adjusted to de energised open or de energised closed valves via the direction of ...

Page 33: ... enables the actuator to activate its force position control which is only deactivated when a new control value is received The cycle time for automatic sending of the control value is adjustable Cyclic sending can also be disabled This parameter is only available if the Cooling or Heat and cool control functions are used Additional control value interval 0 127 x0 1 C Options 0 30 127 Temperature ...

Page 34: ...sends its current temperature whenever this parameter changes more than the specified difference Cyclic sending of setpoint 0 inactive min Options 0 1 2 60 If the setpoint is to be sent cyclically independent of a change the parameter Cyclic sending of setpoint must be set to a time This may be necessary for instance with a higher level boiler that expects to receive setpoints and current values w...

Page 35: ...ase setpoint Options Setpoint heating Setpoint cooling Mid zone of the dead zone If Dependent setpoints were selected with Heat and cool controller function and selection of base setpoint this parameter can be used to define whether the base setpoint refers to comfort temperature for heating cooling or the average temperature between Heat and cool see also page 71 Section 7 4 3 Minimum interval Se...

Page 36: ...setpoint Example with a comfort temperature of 21 C and a manual setpoint adjustment of 3 K users can select any temperature from 18 C to 24 C Maximum manual setpoint increase Options 0 K 1 K 2 K 3 K 4 K 5 K 6 K 7 K 8 K 9 K 10 K If you wish to prevent an excessive temperature increase by the manual setpoint setting the upper range of the manual setpoint preset can be limited with the parameter Max...

Page 37: ...pt of an ON telegram can be used manually reset the setpoint adjustment This is required for instance if a central function is triggered that is intended to reset all the room thermostats to their default settings All manual setpoint adjustments are rest for both dependent setpoints and individual setpoints When receiving base setpoint Options Retain manual setpoint adjustment Reset manual setpoin...

Page 38: ...nd cool control functions are used in which the setpoints Dependent setpoints tab Setpoints general have been selected and the reference of the base setpoint has been set to Base setpoint heating Heating setpoint reduction standby Options 0 5 K 1 0 K 2 K 8 0 K The setting Heating setpoint reduction standby allows you to specify the number of degrees Kelvin that the comfort temperature is lowered d...

Page 39: ...le if the Cooling or Heat and cool control functions are used in which the setpoints dependent setpoints tab Setpoints general have been selected Cooling setpoint increase standby Options 0 5 K 1 0 K 2 K 8 0 K The setting Cooling setpoint increase standby allows you to specify the number of degrees Kelvin that the comfort temperature is increased during standby operation This parameter is only ava...

Page 40: ...ring the frost protection mode If the current temperature undershoots the configured value the ambient temperature controller triggers a control value telegram that causes the relevant heating actuator to heat up the room to prevent damage to the heating system from frost related cooling This parameter is only available if the Heating or Heat and cool control functions are used Setpoint heat prote...

Page 41: ...ntly the number selected must match the actual number of fan stages An actuator is therefore actuated either by the 1 byte communication object or the 1 bit communication object Manual operation of the fan stage is signalled to the actuator via Options Object Automatic ON OFF Object Manual ON OFF This specifies which object sends the information to the actuator or whether the fan stage is being ma...

Page 42: ...ed and connected to the corresponding communication object of the fan coil actuator the ambient temperature controller expects a cyclic transmission of the operating status of the linked fan coil actuator If a message from the actuator is not sent within the monitoring time Send cycle time of actuator in s at least once the ambient temperature controller automatically shows the fault display The c...

Page 43: ...use more that the first stage when night mode is enabled This will apply even if the transmitted control value requests a higher fan stage Automatic return from manual adjustment 0 inactive min Options 0 1 2 60 If Manual stage switching was performed by the user this action can be reset via onsite operation of the ambient temperature controller However a time can also be input after which the ambi...

Page 44: ...e used the heating control type is set to FanCoil and the number of fan stages is min 1 stage Threshold value stage 2 Options 0 10 40 100 Threshold value stage 2 specifies the magnitude of the control value required to switch the ambient temperature controller from fan stage 1 to fan stage 2 The threshold can be defined in percentages Make sure that the threshold for stage 1 is not set higher than...

Page 45: ...use more that the first stage when night mode is enabled This will apply even if the transmitted control value requests a higher fan stage Automatic return from manual adjustment 0 inactive min Options 0 1 2 60 If Manual stage switching was performed by the user this action can be reset via onsite operation of the ambient temperature controller However a time can also be input after which the ambi...

Page 46: ...e used the heating control type is set to FanCoil and the number of fan stages is min 1 stage Threshold value stage 2 Options 0 10 40 100 Threshold value stage 2 specifies the magnitude of the control value required to switch the ambient temperature controller from fan stage 1 to fan stage 2 The threshold can be defined in percentages Make sure that the threshold for stage 2 is not set higher than...

Page 47: ...les the control of the three possible thermostats The Zone x control mode parameter allows you to select the mode in which the Programmable Thermostat can send control telegrams to the thermostat The Mode parameter indicates the sending only for messages indicating the current operating mode of the Programmable Thermostat auto comfort standby Setpoint only sends only the setpoint value currently s...

Page 48: ...set up to eight possible events controlled depending of the status of the corresponding communication objects Input A and Input B In the Automation 1 8 control window it is possible to make the Programmable Thermostat implement different function types that it will carry out automatically communicating with one or more associated remote devices ...

Page 49: ... type is configured as On Off the Programmable Thermostat can send a value that can be set from the parameter to a specific output switching status via the corresponding communication objects Upon switching off Options no reaction send telegram It allows you to send or not to send the control telegram Upon switching on Options no reaction send telegram It allows you to send or not to send the cont...

Page 50: ...YLOS Building Automation Commissioning 6 2 2 Recall Scene configuration If Output type is configured as Recall Scene the Programmable Thermostat has the possibility to send the scene value to be recalled Recall scene Options values from 0 to 255 ...

Page 51: ...e is configured as Shutter the Programmable Thermostat has the possibility to control a shutter actuator Upon switching off Options no reaction send telegram It allows you to send or not to send the control telegram Upon switching on Options no reaction send telegram It allows you to send or not to send the control telegram ...

Page 52: ...is configured as Percentage value the Programmable Thermostat has the possibility to send the value that can be set by the parameter Upon switching off Options no reaction send telegram It allows you to send or not to send the telegram Upon switching on Options no reaction send telegram It allows you to send or not to send the telegram ...

Page 53: ...t 2 objects The parameter allows you to select the number of logic inputs that are estimated by the logic function If 1 object the values remains unchanged on logic function output 6 2 6 Enable Time function The Programmable Thermostat has the possibility of managing the daily temporal programs These programs allow you to enable the logic output of the Programmable Thermostat based on the temporal...

Page 54: ...nitoring block 19 Device On Off General 1 bit EIS1 DPT 1 001 C R W T The controller is activated via this 1 bit communication object when an ON telegram is received and deactivated when an OFF telegram is received It can receive and send Switching the controller on and off is the same as actuating the ON OFF switch on the device When the device is switched off OFF is shown on the display but the c...

Page 55: ...munication object can be used e g by time switches to send information This data item forms the 1 bit object of KNX for switching operating modes night mode It can be received only because a manual switch to night mode on site is not possible In night mode the parametrisable setpoint night mode is enabled and the fan stage is limited to a parametrisable value 0 night mode Off 1 night mode On 3 Com...

Page 56: ...nt The selection of whether switching is via three 1 bit objects or two 1 byte objects OMN OMO is defined by application parameters see above This 1 byte communication object can be used to switch between comfort standby night and frost heat protection modes The object evaluates received telegrams as normal This means for example if a comfort telegram is received the room thermostat switches to co...

Page 57: ... value for the additional heating stage switching or quasi continuous 12 Cooling status Adjustment 1 bit EIS1 DPT 1 001 C R T This data item acts as an output and provides information on whether the cooling output is currently enabled including in the switched off phases of a PWM cycle This information can be useful for visualisation 13 High heat adj switching Adjustment 1 bit EIS1 DPT 1 001 1 byt...

Page 58: ... then be defined as SPB heating SPB cooling or centre of dead zone If only heating or only cooling is enabled the SPB corresponds to the operating mode mode 19 High additional heat adj Adjustment 1 byte 1 bit C R T This data item forms the 1 byte or 1 bit KNX object and can be sent only This object represents the control value for the additional cooling stage switching or quasi continuous 27 Comfo...

Page 59: ...PT 9 001 C R W Object is visible if the individual setpoint preset has been set in the parameters This data item forms the 2 byte KNX object and can be received It is relevant for absolute setpoint management When a setpoint for an operating mode is received setpoint is automatically enabled 34 Heat setpoint cooling Adjustment 2 byte EIS1 DPT 9 001 C R W Object is always visible if the individual ...

Page 60: ...acturers may make it necessary to use the alternative object manual switching on off 0 the user must set the fan stage 0 3 manually 1 the fan stage is set to auto 20 Manual on off Fan auto man 1 bit EIS1 DPT 1 001 C R W T See description of Automatic switching on off The object is visible if it is enabled in the parameters 0 the fan stage is set to auto 1 the user must set the fan stage 0 3 manual...

Page 61: ...t can be used by the ambient temperature controller to receive information about the status of the fan coil actuator It can evaluate whether stage 1 or no stage was activated 38 Speed 3 automatic control Automatic fan 1 bit EIS1 DPT 1 003 C R W T U This 1 bit communication object can be used by the ambient temperature controller to receive information about the status of the fan coil actuator It c...

Page 62: ...This object is repeated for each automation from 1 to 8 77 Scene Automation 1 1 byte EIS1 DPT 18 001 C R T This communication object indicates the scene to be recalled This object is repeated for each automation from 1 to 8 85 Output on up down movement Automation 1 1 bit EIS1 DPT 1 008 C R T This communication object enables the movement of a shutter actuator This object is repeated for each auto...

Page 63: ...ng can be selected for the operating mode When it is set to depending on object switching heating cooling the object state is queried via the bus when switching on or after a reset Comfort mode is default after reset however Standby Night mode or Frost Heat Protection can also be selected The active fan stage after reset can be stage 1 2 or 3 If no stage is to be active after reset select the sett...

Page 64: ...closing an open window Night mode has the next higher priority followed by comfort mode If none of the above three operating modes are enabled the ambient temperature controller is in standby mode 7 1 2 Operating mode switching 1 byte When switching operating mode via 1 byte an object is available When for example a comfort telegram is received the room thermostat switches to comfort mode If a nig...

Page 65: ...sation The transmission is done depending on the parameter send current value on change up and send current value cyclically Both parameters are disabled by default This means that if the current temperature is to be sent at least one setting must be enabled The setting send current value on change up has the advantage that even the smallest changes of the measured temperature adjustable from 0 1 ...

Page 66: ... separate communication objects control value heating or control value cooling If a common object is used it may be necessary to inform the actuator whether the control value refers to heating or cooling The parameter switchover between heating and cooling can be enabled with the setting automatic and send a 1 bit communication object switchover heating cooling If heating operating mode is enabled...

Page 67: ...n integrated hysteresis which varies around the setpoint to prevent fast oscillations of the output states The hysteresis can be parametrised in different magnitudes For example if the setpoint in heating mode is 21 C and the hysteresis is 1 0 K the controller switches on if the temperature falls below 20 5 C and off if it exceeds 21 5 C The hysteresis parameter depends on how fast the heating can...

Page 68: ...yte control value of a continuous controller can also be sent to KNX heating actuators which convert the 1 byte signal to a PWM value This can be used to control electrothermal valves It may be useful to restrict the dynamic range because electrothermal valves required a certain time to open and close see also page 69 Section 7 3 3 PWM controller This is done with the parameters minimum control va...

Page 69: ... if a control value of 70 is output the make time will be 7 minutes and the break time 3 minutes at a default cycle time of 10 minutes This transfers the advantages of continuous control control to the desired setpoint no oscillations to drives that are designed for on off signals only such as electrothermal drives T 21 ûC Sollwert Istwert t 1 30 30 40 50 70 0 t 10 min Continuous room heating or c...

Page 70: ...be used a electrothermal actuator It takes 2 3 minutes to open an electrothermal valve fully A cycle time shorter than 15 minutes is therefore not reasonable b underfloor heating The time of constant of underfloor heating is very large A cycle time of 20 minutes is therefore sufficient c hot water heating Electrothermal drives are commonly used A cycle time of 15 minutes gives very good control re...

Page 71: ...ontrolling fan stages using a 1 byte or three 1 bit communication objects with a fan coil actuator Switching fan stages will heat or cool a room faster The fan stage that is to be enabled at which control value is defined on a separate tab fan coil heating or fan coil cooling Note that the threshold values must not overlap i e the stage 1 threshold value must always be less that the stage 2 thresh...

Page 72: ...quired 7 3 6 Two stage heating and cooling In specific instances such as when using underfloor heating it may be necessary to install a quick additional stage for the heat control in order to warm up the room rapidly When the room thermostat is pre set to supplementary stage heating enabled it has a second heating system with switching control 1 bit or a quasi continuous control which is controlle...

Page 73: ...cooling setpoint comfort mode depending on whether heating or cooling is currently enabled The received values are written to the device memory and are retained even after a bus power failure and restoration New base setpoints can also be sent to the device in the event of changes in room usage such as by visualisation A new parametrisation is not required The base setpoint reference is taken into...

Page 74: ...lue must be sent to the corresponding communication object setpoint heating comfort setpoint heating standby setpoint heating night mode setpoint frost protection setpoint cooling comfort setpoint cooling standby setpoint cooling night mode or setpoint heat protection The received values are written to the device memory and are retained even after a bus power failure and restoration New setpoints ...

Page 75: ... automatically The fan levels can be actuated in three ways with 1 bit values i e a separate 1 bit communication object fan coil stage switch is available This is required for normal switching actuators if KNX switching actuators and fan coil units are used note the connection instructions of the fan coil unit with a 1 byte object as count value 0 3 i e there is a 1 byte communication object fan s...

Page 76: ...ne MI Italy Tel 39 02 9034 1 Telefax 39 02 9034 7609 www abb it mylos www abb com The data and illustrations are not binding We reserve the right to modify the contents of this document on the basis of technical development of the products without prior notice Copyright 2012 ABB All rights reserved from Monday to Saturday from 9 00 to 19 00 ...

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