Hospitality Thermostat
Contents
1. Zennio Hospitality Thermostat 3 1 5 E SCENES TAB After enabling Scenes in the Configuration screen a new tab will be included into the menu on the left As shown in Figure 19 from this tab it is possible to independently enable up to five scenes and to configure what actions should be taken over the different attributes of the thermostat when each of the scenes is triggered GENERAL Scene 1 uf 4 Hospitality Thermostat 1 E A CONFIGURATION Scene Number 1 B Setpoints l E E E Allow Scene Recording d D Additional Settings On Off Do not change E Scenes m S Cooling H C Mode Do not change Heating a S special Mode Do not change Scene 2 Scene 3 Scene 4 Scene 5 Figure 19 Scenes For each of the five scenes the parameters are e Scene Number number of the scene between 1 and 64 the arrival of which through HTx A Scene Input decremented by one according to the standard will trigger the execution of the actions defined below e Allow Scene Recording if enabled the reception of scene save commands values between 128 and 191 will also be possible being therefore possible to overwrite the configuration initially parameterised for the scene See section 2 7 for details 9 On Off sets the on off state On Off or Don t Change the thermostat will adopt upon the2. COWS 13Dusesesneuidtuididstanidibeiusterenidttodma ted ueniet crit im edu Ebesip UE 44 ANNEX Pre set Values for the PI Control ccccccccccssssssseeececccsseeessecececesssaeesseeececesseugaaseeeseess 45 http www zennio com Technical Support http zennioenglish zendesk com 3 Zennio Hospitality Thermostat 1 INTRODUCTION 1 1 HOSPITALITY THERMOSTAT A variety of Zennio devices feature a module for performing a thermostatic control of the room by monitoring a set of indicators Depending on the configuration and the setpoint or target temperature different commands addressed to the interfaces that interact with the climate system will be transmitted over the KNX bus so that the temperature setpoint can be achieved The thermostatic control function does not require connecting inputs or outputs to the device as all the communication takes place through the KNX bus The Zennio devices may incorporate one of the following thermostat types 9 Zennio Thermostat aiming at performing a general thermostatic control with multiple customisable functions Hospitality Thermostat aiming at performing a thermostatic control at hotels hospitals or other environments with guest rooms 9 Building Thermostat and Home Thermostat progressively replaced by the Zennio Thermostat but still available on some devices To confirm whether a particular device or application program incorporates the thermostat fu
3. will switch to Cooling while 1 will switch to Heating Enabled or not the current mode can always be consulted by reading the value of object HTx A Mode Status 0 will mean Cooling and 1 Heating http www zennio com Technical Support http zennioenglish zendesk com 26 Zennio Hospitality Thermostat In case of enabling the automatic changeover an upper and lower hysteresis band around the setpoint must be defined see section 2 4 2 from 0 to 255 tenths of a degree H C Automatic changeover Enabled Lower Band 30 x O 1 C E r m E ri HH c Upper Band 30 4 Mode after exiting comfort Stay in the same H C mode Figure 8 H C Automatic Changeover In addition Mode After Exiting Comfort can be configured as Stay in the same H C mode or Change to the system H C mode to set whether the active operation mode after leaving the Comfort special mode should remain as is until a mode switch order arrives or automatically switch to the current mode of the room managing system gt Send Both H C Control Signals Periodically sets whether to send periodically the control variables of both the Heating and the Cooling modes and if enabled the Additional Heat and Additional Cool objects see sections 3 1 7 and 3 1 7 or whether to send only the variable of the currently active mode Note that the control variable of the currently inacti
4. 2 4 2 AUTOMATIC MODE SWITCHOVER Under the automatic mode selection the Hospitality thermostat assumes the decision of which of the two operation modes is the proper one each time as long as the current special mode is Comfort section 2 3 Mode changeovers are notified to the bus through the corresponding status objects http www zennio com Technical Support http zennioenglish zendesk com 13 Zennio Hospitality Thermostat Under a special mode other than Comfort the operation mode will entirely depend on the mode selection object as in section 2 4 1 The automatic mode selection algorithm is as follows 9 f the real setpoint is greater than the effective room temperature the Heating mode will be triggered 9 f the real setpoint is lower than the effective room temperature the Cooling mode will be triggered In order to prevent continuous mode changes in the vicinity of the temperature setpoint itis possible to configure a certain clearance or margin band around it so that 9 The Heating mode gets triggered when the effective room temperature is a little colder than the setpoint 9 The Cooling mode gets triggered when the effective room temperature is a little hotter than the setpoint Upper Band Effective temperature Real Setpoint Lower Band i Cooling Mode Pi Heating Mode Figure 2 Automatic H C Mode changeover Being the automatic mode switch enabled the integrator will be given
5. Zennio Passion for KNX innovation Hospitality Thermostat Thermostatic Control Module for Guest Rooms c t zZ t oc LLI N gt User Manual Version 0 2 a WWW zennio com Zennio Hospitality Thermostat CONTENTS Soi 2 E ANNE OCC TION Nm 4 Jui Hospitality TCI OS Gat a sotns cet cscetece as ate eevee E TEE 4 COPAY SUN umm 5 NES SEIT T E 5 2 2 ao Ei ERN UT 5 2 3 Special Modes Comfort Standby Economy Protection ccccccceeeessseeeeseseeeeeseseeeeess 6 2 3 1 Guest Control vs Managing System Control esssesessesessressrreesrrrrssrreresrrresrreresrrresene 8 PM EE CONO ON e EEE 8 23L Paden ODISBE eee E EA AE A 8 2 3 1 3 User Comfort Setpoint Constraints 9 2 3 2 Switching the Special MOdeC cccccccssseccccsseccccesecceceesececeesececeeeceeeeeseeesausecessuneees 9 2 3 2 1 Through the Special Mode Switch Objects eessssessesessensesreresrressrreresrrrseseeee 9 2 3 2 2 According to the Room OCCUPANCY ccccesseccceseccceesececeeesecesaeseceesenceeeeees 10 2 3 2 3 Due to Window Lock Events eesseeeeeeeeene nennen nennen nnns 12 2 4 Operation Modes Heating Cooling eeeeeeeeeeennnnnnn 13 2 4 1 Manual Mode SWItCH ccccccccccssssssseeecccceseeeesseecccceessaeeeseeececeessauauseeeceeeesuaggaesss 13 2 4 2 Automat
6. a one byte or a one bit object depending on the configuration of the Control Type http www zennio com Technical Support http zennioenglish zendesk com 41 Zennio Hospitality Thermostat Control Type sets whether the climate system valve should be controlled through precise positioning Continuous 1 byte or through on off orders PWM 1 bit In the first case the control variable will be a one byte object and will reflect as a percentage the degree of openness required in the valve 100 entirely open 0 entirely closed In the second case this one byte object will be available together with two new one bit objects gt One with the same name as the above one byte variable will alternatively adopt the values 1 and 0 depending on the cycle time PI Cycle so that the time proportion between the two states equals the aforementioned degree of openness gt Another one named Tx Heating PI State will have the value 1 as long as the value of the PI signal is greater than 0 and the value 0 while it is exactly 0 e Moreover when the control type is set to PWM 1 bit the following specific parameters need to be configured Control Type PWM 1 bit PWM Minimum Time 10 B xis lf the switching time is lower Switch the control signal using the minimunt than the minimum Figure 24 PWM Control 1 bit gt Minimum PWM Time minimum time bet
7. comfort setpoint see section 2 3 1 1 and the eco counter see section 2 8 is set to zero e When the room state changes from Sold to Unsold the thermostat will switch to Comfort Standby or Economy depending on the parameterisation which will also happen whenever a no occupation state object is received while the room is unsold Occupation notifications however will be ignored during the unsold state Note that the sold unsold object can be hidden in parameters In the absence of such object the room will be always considered as Sold Occupied Unoccupied Transitions e Whenever a sold room changes from Occupied to Unoccupied the special mode will change to Standby gt The thermostat can also switch to Economy after a certain time in Standby and without occupation This Standby to Economy time is configurable in ETS or via bus object 9 Depending on the parameterisation when a sold room changes from Unoccupied to Occupied the thermostat will switch to Comfort Standby Economy or to the last active mode prior to leaving the room Opting for the last active mode requires configuring a default mode either Standby or Economy gt Incase the last active mode was not Comfort the thermostat will trigger such default mode gt Incase the last active mode was Comfort it is possible to parameterise whether the thermostat can return to Comfort in any case or only if the room remained unoccupied for less t
8. execution of the scene In case the option Thermostat always ON section 3 1 1 has been activated this parameter will not be available Note this is set to Don t Change the on off state of the thermostat will be ignored when saving the scene See section 2 7 http www zennio com Technical Support http zennioenglish zendesk com 38 Zennio Hospitality Thermostat H C Mode sets the general operation mode Cooling Heating Don t Change the thermostat will adopt upon the execution of the scene In case the option H C Automatic changeover see section 3 1 1 has been activated this parameter will not be available Note if this is set to Don t Change the general operation mode of the thermostat will be ignored when saving the scene See section 2 7 Special Mode sets the specific special mode Don t Change Comfort Standby Economy Protection the thermostat will adopt upon the execution of the scene Note if this is set to Don t Change the current special mode or setpoint of the thermostat will be ignored when saving the scene See section 2 7 http www zennio com Technical Support http zennioenglish zendesk com 39 Zennio Hospitality Thermostat 3 1 6 HEATING TAB The Heating tab lets the integrator set the algorithm and all the parameters involved in the Heating working mode of the thermostat For a proper configuration
9. other words when the User Comfort Setpoint is set to an out of range value the corresponding status object will or will not depending on the parameterisation respond with the actual value considered by the thermostat Note these constraints are applied over the User Comfort Setpoint which may have been applied a hidden offset as already explained 2 3 2 SWITCHING THE SPECIAL MODE The thermostat may switch from one special mode to another upon request by object or automatically after certain events related to the room occupanoy or to the window state objects 2 3 2 1 THROUGH THE SPECIAL MODE SWITCH OBJECTS owitching between the special modes is possible through either four binary objects one per special mode or a one byte object The former four and the latter work independently a mode switch order through the one byte object will be executed http www zennio com Technical Support http zennioenglish zendesk com 9 Zennio Hospitality Thermostat unconditionally no matter which the state of the one bit objects is and vice versa On their part these binary objects can behave in two ways 9 Trigger activating a special mode will require sending one 1 through the object corresponding to that mode Sending one 0 will have no effect 9 Switch activating a special mode will require sending one 1 through the object corresponding to that mode provided that there are no other mode
10. the Protection special mode can be modified through specific bus objects gt HTx B Protection Setpoint Cooling and HTx B Protection Setpoint Heating http www zennio com Technical Support http zennioenglish zendesk com 30 Zennio Hospitality Thermostat 3 1 3 C ROOM OCCUPANCY SETTINGS TAB The parameters included in this screen are related to the occupancy states of the room and the special mode transitions derived from them GENERAL 4 Hospitality Thermostat 1 A CONFIGURATION B Setpoints C Room Occupancy Settings D Additional Settings Cooling Heating Setpoint after Returning to Comfort Mode Time to Reset the User Comfort a Setpoint 0 Disabled m Standby to Economy Time D Disabled 0 m Figure 12 Occupancy settings This screen contains the following parameters System Comfort Delayed Scenes Occupied 0 Disabled 0 Not Occupied 0 Disabled 0 False Non Occupied Detection 0 0 Disabled S 1 bit Occupancy Object Sold Unsold Room Object Mode to Activate when the Room Economy is not Sold Mode to Activate after Switching to Last Mode Occupied Default Mode Standby Comfort to Default Mode Time a 0 Disabled m fi x WE 4 4 e Scenes enables the room occupancy management through scenes When the box is checked the HTx A Scene Input object is added to the project topology and the
11. the possibility of parameterising whether the thermostat should maintain the operation mode Heating Cooling unchanged after leaving the Comfort special mode see section 2 3 or switch to the operation mode imposed by the system i e by the room manager Note that in both cases after leaving the Comfort special mode the thermostat will take into account any external orders that may be received through the mode switch object as the automatic switch only applies under the Comfort special mode http www zennio com Technical Support http zennioenglish zendesk com 14 Zennio Hospitality Thermostat 2 5 CONTROL METHODS The room thermostatic control consists in sending the proper orders to the climate system so the room ambient temperature reaches a certain real setpoint and then remains stable around that value The Hospitality thermostat offers two algorithms to perform such temperature control Two Point Hysteresis Control 9 Proportional Integral PI Control 2 5 1 TWO POINT HYSTERESIS CONTROL oimilar to the climate control performed by conventional thermostats the basis of this algorithm consists in commuting the control signal between on and off depending on whether the room temperature has reached the setpoint or not Indeed apart from the setpoint temperature two values of hysteresis lower and upper are required in order to define a clearance or margin around the setpoint therefo
12. 0 Zennio Hospitality Thermostat 3 1 6 1 2 POINT CONTROL After selecting the two point hysteresis control method see section 2 5 1 the following parameters must be configured Control Method 2 point Control Lower Hysteresis 10 x 0 1 Upper Hysteresis 10 x 0 19C Figure 22 Two Point Hysteresis Control Method 9 Lower Hysteresis defines the value of the lower hysteresis between 1 and 200 tenths of a degree i e the margin below the setpoint temperature 9 Upper Hysteresis sets the value of the upper hysteresis between 1 and 200 tenths of a degree i e the margin over the setpoint temperature The control variable is the HTx Heating Control Variable one bit object which will throw the value 1 when the thermostat considers that the room needs to be heated and the value 0 when the heating system can remain off This variable will be sent periodically according to the aforementioned parameter Resending Period 3 1 6 2 PI CONTROL After selecting the PI control method see section 2 5 2 the following parameters must be configured Control Method P Control 7 Control Type Continuous 1 byte PI Cycle 15 m Control Parameters Advanced Proportional Band 4 x 1K Integral Time 150 x 1min Restart accumulated Yes error on saturation Figure 23 PI Control The control variable HTx Heating Control Variable in this case may be either
13. CONTROL vs MANAGING SYSTEM CONTROL 2 3 1 1 COMFORT SETPOINTS It is important to note that only under the Comfort mode the guest can take control over the setpoint depending on their needs Under any other special mode the setpoint is the one defined in parameters or by the room manager Example Special Modes Suppose the following setpoint configuration e Comfort Setpoint 23 C e Comfort Setpoint 21 C 9 Standby Setpoint 26 C amp Standby Setpoint 18 C 9 Economy Setpoint 28 C Economy Setpoint 14 C 8 Protection Setpoint 35 C 8 Protection Setpoint 7 C Being in Heating mode and under the Comfort special mode the guest may set a setooint of 18 C manually which depending on the configuration and the reference temperature will probably trigger the Cooling mode see section 2 4 2 If the special mode is then switched to Standby Economy Protection then the setpoint will automatically change to 26 28 35 Therefore under Comfort two different setpoint temperatures must be considered 9 Comfort Setpoint set in parameters or by object this is the temperature preferred by the room managing system for Comfort 9 User Comfort Setpoint this is the temperature preferred by the guest who may modify it by means of an interface such as the Z41 touch panel 2 3 1 2 HIDDEN OFFSET On the other hand under the Comfort special mode the Hospitality thermostat brings the room manager the opt
14. GURATION H C Mode after programming Heating B Setpoints LILGLLLZIGkiGCAGILLLLLA C Room Occupancy Settings H C Automatic changeover Disabled D Additional Settings Cooling send both H C control signals No Heating periodically Reference Temperature Temperature Source 1 Thermostat always ON Yes Sending Statuses on Bus Voltage Recovery No Scenes Figure 7 Configuration 9 Thermostat Function defines the main working modes that will be available Heating Cooling or Heating and Cooling Depending on the selection tabs Heating and Cooling will be shown in the tab list on the left Please refer to sections 3 1 6 and 3 1 7 for details on their parameterisation If the two modes have been enabled additional parameters will be displayed H C Mode After Programming sets whether the thermostat should start up in the Heating mode or in the Cooling mode right after an ETS download H C Automatic Changeover grants or not the thermostat the responsibility of automatically switching from one operation mode to the other one Heating Cooling depending on the effective reference temperature and the setpoint This only applies to the Comfort special mode see section 2 4 2 While not in the Comfort mode or if the automatic changeover has not been enabled the communication object named HTx A Mode will be in charge of receiving external mode switch orders 0
15. I thermostat control system determine a control variable of 25 which will be interpreted by intermediate positioning valves as an order to open at 25 The equivalent PWM variable for that would be a binary signal that remains at high level value 1 for 25 the configured PI cycle time and at low level value O during the remaining 75 of the cycle time Therefore an on off valve will stay entirely open 25 of the time and entirely closed 75 of the time Average Value 2596 On the other hand under situations of control signal saturation during which the variable becomes 100 due to drastic differences between the setpoint and the reference temperature a significant integral error will accumulate as the time passes so once the setpoint is reached the system will still send a positive signal because of the influence of the system history in the PI algorithm This will cause an excessive heat cool supply which will take some time to be compensated To prevent these situations the advanced configuration of the Hospitality thermostat offers an option to reset the accumulated error as soon as the setpoint is reached after a saturation of the signal The following figures show the effect on the ambient temperature MEN Figure 5 Effect of Resetting the Accumulated Integral Error after Signal Saturation http www zennio com Technical Support http zennioenglish zendesk com 18 Zennio Hospitality Thermo
16. Setpoint 239C 23 C http www zennio com Technical Support http zennioenglish zendesk com 20 Zennio Hospitality Thermostat 9 Heating Mode as soon as the reference temperature is found to be lower or equal than T being T the setpoint temperature minus the Additional Heat band the auxiliary heat system will come into operation to provide a more effective heating Then it will switch off once the reference temperature is greater or equal than T 0 5 C Example Additional Heating Suppose a setpoint of 23 C and an Additional Heat band of 2 C In such case the additional heating will interrupt at 21 5 C See figure in the next page 239C 21 59C TEL 19 J Additional Heat band 239C 29C 189C Additional Additional Heating OFF Heating ON http www zennio com Technical Support http zennioenglish zendesk com 21 Zennio Hospitality Thermostat 2 7 SCENE MANAGEMENT The Hospitality thermostat offers the possibility of managing up to five different scenes each of which can trigger a particular thermostat action whenever its particular scene number is received from the bus Optionally the integrator can enable the possibility of recording saving scenes The available actions which are not mutually exclusive and which can be enabled or not and configured for each scene are e Switch on Switch off If the thermostat has been configured not to be always on the execution of the sce
17. Settings E Scenes Economy Setpoint 30 00 x IPC Cooling Heating Overheating Protection Setpoint 35 00 x 71 C Heating Comfort Setpoint 22 00 x TC Standby Setpoint 19 00 x TC Economy Setpoint 16 00 x I Freezing Protection Setpoint 7 00 x 17 C Figure 11 Setpoints Note the figures shown next contain parameters related to both the Heating and the Cooling modes If only one of the two modes has been enabled ETS will hide the parameters of the other mode The parameters shown in screen tab are 9 Comfort Setpoint defines the Comfort setpoints that will be applied after downloading The range of the values is from 20 C to 100 C Default values are 24 C for Cooling and 22 C for Heating mode Note that both the user and the system Comfort setpoints see section 2 3 1 will initially match and be equal to the value of this parameter although both can be modified independily through specific bus objects HTx B User Setpoint Control Cooling and Heating gt HTx B Comfort Setpoint Cooling and HTx B Comfort Setpoint Heating It is possible to obtain the current user setpoint by reading the object HTx B User Setpoint Status Note that the value of this object may be http www zennio com Technical Support http zennioenglish zendesk com 29 Zennio Hospitality Thermostat conditioned by the hidden offset or the setpoint constraints if any see section 3 1 4 To obtain the effective
18. be reached in the room he initial value of the temperature setpoint is set in parameters although the final user may modify the value according to their requirements at any time As explained in later sections the Hospitality thermostat distinguishes between the user setpoint and the real setpoint being the room manager able to introduce a hidden offset between the two values which will be imperceptible for the final user 9 Reference temperature this is the actual ambient temperature registered in the room at a certain time and is typically provided by an external KNX device with temperature measurement capabilities It is also possible to combine two different reference temperatures obtained from separate sources one of which would be for example the internal temperature probe of some Zennio devices according to different proportions http www zennio com Technical Support http zennioenglish zendesk com 5 Zennio Hospitality Thermostat Proportion Source 1 Source 2 1 7596 2596 2 5096 5096 3 2596 7596 Table 1 Combining Reference Temperatures Of course it is necessary to group under the same addresses the objects intended for the reception of the reference temperatures and those through which the values are sent from the devices that measure them or the internal temperature probe object of the same itself when required As with the temperature setpoint in case the room manager defines a hidden
19. byte object http www zennio com Technical Support http zennioenglish zendesk com 33 Zennio Hospitality Thermostat 3 1 4 D ADDITIONAL SETTINGS TAB Initial Mode after programming Economy 1 byte Special Mode Control 1 bit objects working mode see user Switch manual Default made Economy Window Status User Comfort Setpoint Constraints Eco Mode Notification Hidden Offset Thermostat Locking Object Figure 13 Additional Settings The parameters shown in this tab are 9 Initial Mode after programming defines the special mode to be activated after a download Comfort Standby and Economy 9 1 byte Special Mode Control enables or disables the HTx D Special Mode one byte object which permits activating the different special modes by writing the appropriate values on it Value Mode 1 Comfort 2 Standby 3 Economy 4 Protection Table 2 Special Modes The currently active special mode can be obtained by reading the one byte object IHTx D Special Mode Status It is also possible to read the HTx D Comfort Mode Status one bit object to know whether the current mode is Comfort 1 or not 0 49 1 bit Objects Working Mode enables or disables the special mode selection one bit objects gt HTx D Special Mode Comfort gt HTx D Special Mode Standby http www zennio com Technical Support http zennio
20. ce is restarted 2 5 2 PROPORTIONAL INTEGRAL PI CONTROL 27 26 25 24 23 Figure 4 Proportional Integral Control It is a lineal control algorithm based not only on the difference between the setpoint and the reference but also on the history of the system In addition the control signals sent http www zennio com Technical Support http zennioenglish zendesk com 16 Zennio Hospitality Thermostat are not strict open close orders but intermediate orders This reduces the temperature oscillation and the non comfort sections of the previous algorithm making the ambient temperature become progressively stable around the setpoint This algorithm requires configuring three main parameters 9 Proportional Constant K expressed in terms of degrees estimates an error value proportional to the difference between the real setpoint and the reference temperature 9 Integral Time T expressed in minutes this constant depends on the thermal inertia of the climate system and makes it possible to adjust the approximation error depending on the elapsed time 9 PI Cycle Time expressed in minutes or seconds this cycle time is taken into account for setting the temperature sampling frequency and therefore the update frequency of the control signal being sent Although the Zennio devices let expert users manually set custom values for the above parameters it is advisable to make use of one of the pre set options
21. chosen in parameters The arrival of this value will trigger the Protection special mode which will remain active until all the window status objects return to the inverse value which will recover the mode that was active prior to the window opening event taking then into account any mode change orders that may have been received while in Protection The windows status function can be disabled or re enabled through object One thermostat lock object is also provided with similar purpose as the window status objects but easier to use when the lock object receives the lock value 1 or O selectable in parameters the thermostat will enter the Protection special mode and will leave it afterwards when the unlock value 0 or 1 also selectable is received Notes 9 When the Protection mode has been triggered by means of the usual mode change objects and not through the window or lock objects the thermostat does execute further mode change order as soon as they arrive thus leaving the Protection mode Ifthe window or lock objects get activated when the current mode is already Protection deactivating the window or lock objects will not make the thermostat leave such mode unless other mode switch orders had been http www zennio com Technical Support http zennioenglish zendesk com 12 Zennio Hospitality Thermostat received in the meanwhile 9 Changing to Protection due to an open window or a lock event does not a
22. d room thermostat in Comfort mode and user setpoint within the ecological range Eco performance 9 Occupied room thermostat not in Comfort mode gt Eco performance 9 Occupied room thermostat in Comfort mode but user setpoint outside the ecological range Non Eco performance To use this function it is necessary to define in parameters or via bus objects the eco range for the setpoints under Cooling and under Heating i e a lower setpoint limit for the Cooling mode and an upper setpoint limit for the Heating mode A binary object will be sent whenever the room switches from Eco to Non Eco value 0 or from Non Eco to Eco value 1 Note when the room is unoccupied or occupied but not in the Comfort special mode reading the value of this object may throw a meaningless value In addition to the binary object the thermostat provides the room manager a one byte object which returns the percentage of the eco performance time in relation to the total occupation time of the room since it was sold This object is transmitted to the bus whenever its value changes with a minimum time space of ten minutes between two consecutive transmissions http www zennio com Technical Support http zennioenglish zendesk com 24 Zennio Hospitality Thermostat 3 ETS PARAMETERISATION 3 1 DEFAULT CONFIGURATION Depending on the Zennio device several Hospitality thermostats may be available for paramet
23. english zendesk com 34 Zennio Hospitality Thermostat gt HTx D Special Mode Economy gt HTx D Special Mode Protection The response type can be Trigger or Switch see section 2 3 2 1 In case of opting for Switch an additional parameter will show up Default Mode for the selection of the special mode to be adopted by the thermostat when all the binary objects have the value 0 This option should not be confused with the selection of an initial mode for the thermostat which is determined by the value of Initial Mode after programming In case of selecting Disabled switching the special mode will only be possible through the one byte IHTx D Special Mode object if enabled 9 Window Status enables or disables the HTx D Window Status n input one bit objects which will make the thermostat switch to the Protection mode see section 2 3 2 3 as soon as the open window value 0 or 1 according to the parameterisation is received through one of them Up to four window objects are available depending on Number of Objects Window Status Fi Number of Objects 1 Ls Configuration o Closed 1 Open Figure 14 Windows status On the other hand the one bit object HTx D Enable Window Status permits interrupting 0 and resuming 1 the window status function While interrupted the incoming values will be ignored User Comfort Setpoint Constraints
24. erisation as the figure shows System Configuration Only one device Operating Notification Period 4 x 15 ad Hospitality Thermostat 1 Hospitality Thermostat 2 Hospitality Thermostat 3 Hospitality Thermostat 4 Hospitality Thermostat 5 Hospitality Thermostat 6 Hospitality Thermostat 7 Hospitality Thermostat 8 Hospitality Thermostat 9 Hospitality Thermostat 10 Hospitality Thermostat 11 Hospitality Thermostat 12 Fx mp qe mp qu pm py pep my pm m 0 0 Hospitality Thermostat 13 3 Hospitality Thermostat 14 Figure 6 Enabling the Hospitality Thermostat For details on how to enable the available thermostats please consult the specific user manual of the device Once the thermostat is enabled the tab tree on the left will include a set of tabs for the configuration of the related parameters Note or the convenience of the integrator and due to the large amount of communication objects the name of most of the parameter screens has been labelled with a capital letter A B C and so have been the names of the communication objects depending on the parameter screen their functionality refers to http www zennio com Technical Support http zennioenglish zendesk com 25 Zennio Hospitality Thermostat 3 1 1 A CONFIGURATION TAB indi Th Functi Heating and Cooli ostat t teating and Coolin 4 Hospitality Thermostat 1 IS E Mud 9 A CONFI
25. ffect the special mode status objects as it is an indirect triggering 2 4 OPERATION MODES HEATING COOLING The concepts explained so far already introduce the fact that there are up to two operation modes available in the climate system heating and cooling and that consequently one setpoint temperature for heating and one for cooling are required per special mode The integrator should set in parameters whether heating cooling or both modes are available so that the thermostat can manage by sending the corresponding orders to the bus situations of cold weather and or hot weather If both modes are made available it will be possible to parameterise a periodical sending of the two control variables to the KNX bus and not only of that of the current mode In such case the variable of the non active mode will be zero Moreover provided that both modes have been enabled switching between them can be done automatically or by writing to a specific binary communication object 2 4 1 MANUAL MODE SWITCH The manual mode switch takes place upon the reception of a specific binary object so that the value 0 will trigger the Cooling operation mode while one 1 will trigger the Heating operation mode Whenever the operation mode switches the thermostat will confirm it by sending the proper status objects and will adopt the setpoint that under such operation mode corresponds to the special mode that may be active
26. following parameters are shown gt Occupied 0 Disabled defines the scene number 1 to 64 that is expected to arrive from the presence detector when the room changes from Unoccupied to Occupied see section 2 3 2 2 Entering the value 0 disables the activation of the Occupied state through the scene object http www zennio com Technical Support http zennioenglish zendesk com 31 Zennio Hospitality Thermostat Not Occupied 0 z Disabled analogous to the above parameter but related to the transition from Occupied to Unoccupied gt False Non occupied Detection 0 Disabled defines the scene number 1 to 64 that is expected to arrive from the presence detector when a false transition from Occupied to Unoccupied takes place Such option is available in some Zennio devices with motion detection capabilities please refer to their specific user manual Entering the value 0 disables the recognition of false Unoccupied detections through the scene object Note the THTx A Scene Input will show as long as scenes have been enabled from this parameter or from the A Configuration 3 1 1 as the same object serves to both purposes 9 1 bit Occupancy Object enables the room occupancy management through the one bit object HTx C Presence Detector x which should receive the value 1 from the presence detector when the room changes to occupied and the value 0 when
27. g The one bit and one byte notifications see section 2 8 will be sent to the bus through objects IHTx D Eco Mode Notification and HTx D Eco Mode Ratio respectively 9 Hidden Offset enables or disables the implementation of a hidden offset over the user Comfort setpoint resulting in a less energy demanding effective setpoint see section 2 3 1 2 Object IHTx A Room Temperature will also be applied the same offset to preserve consistence from the guest s point of view http www zennio com Technical Support http zennioenglish zendesk com 36 Zennio Hospitality Thermostat The offset needs to be configured in parameters although it can be modified through object HTx D Hidden Offset Value while its application can be interrupted or resumed through object HTx D Hidden Offset On Off Hidden Offset v Offset Value e 00 x TC Figure 17 Hidden offset setting 9 Thermostat Locking Object enables or disables the HTx D Thermostat Lock binary object see section 2 3 2 3 The lock and unlock trigger values must be set through the Configuration parameter which offers the following options gt 0 Locked 1 Unlocked gt Q Unlocked 1 Locked default option Thermostat Locking Object Ed Configuration o Unlocked 1 Locked Figure 18 Thermostat Locking Object http www zennio com Technical Support http zennioenglish zendesk com 3
28. han a certain time otherwise it will return to the default mode Such comfort to default mode time is configurable in ETS or via bus object Whenever the thermostat returns to Comfort after the room becomes occupied either because the last mode was Comfort or by having selected Comfort explicitly It can restore the previous user Comfort setpoint or make the current system Comfort http www zennio com Technical Support http zennioenglish zendesk com 11 Zennio Hospitality Thermostat setpoint prevail over it This is configurable in parameters An intermediate approach for the above is also possible applying the system Comfort with a delay In such case the thermostat will recover the user setpoint whenever Comfort is triggered after the occupancy of the room unless the thermostat has remained out of Comfort for some time configurable in ETS after which the user setpoint will be discarded It is also possible at any time to reset the user setpoint to the system comfort setpoint through a specific object 2 3 2 3 DUE TO WINDOW LOCK EVENTS The Hospitality Thermostat provides four window status binary objects which can be linked to external sensors reporting anomalous situations an open window repair works etc that suggest relaxing the thermostatic control temporarily and thus switching to the Protection special mode see section 2 3 The value 0 or 1 associated to the open window status can be
29. hermostat will apply whenever it triggers the Comfort mode due to the room being occupied again gt User Comfort i e the user Comfort setpoint gt System Comfort i e the system Comfort setpoint gt System Comfort Delayed i e the user Comfort setpoint unless the room remains unoccupied for a significant amount of time in such case the system Comfort setpoint will be applied See section 2 3 2 2 In case of choosing the latter a new parameter will allow defining such delay e Time to Reset the User Comfort 0 to 255 seconds minutes or hours the value 0 disables the function Note this value can be overwritten through the HTx C Time to Reset the User Comfort two byte object These parameters only apply in case of returning to Comfort as a consequence of an Unoccupied to Occupied transition Special mode switches while occupied do not involve a reset of the user setpoint On the other hand if such transition triggers a special mode other than Comfort and afterwards the guest switches to Comfort the user setpoint will still remain as it was before the room became unoccupied 9 Standby to Economy Time defines a timeout after the room became Unoccupied 0 to 255 seconds minutes or hours to switch the special mode from Standby to Economy A value of 0 disables this function Note this value can be overwritten through the HTx C Transition Time Standby to Economy two
30. ic Mode Switchover sssesseseeeeeeeeeeen nennen ener nennen sns nnns 13 ME Cii te 15 2 5 1 Two Point Hysteresis Control nennen nnns 15 2 5 2 Proportional Integral Pl Control aeo rbd raro n rk tera ERE rk EOS X Dr2N POE FP REPaDERiePS 16 2 5 3 Control Under the Protection Special Mode eee 19 2 6 Addittonal Cooling 7 Heating ssim esatta desi eeu ra rud diera ena esti da ice sire e ai 20 2 7 Scene MANABEMENL ccsccssccsccescesccesccsccscesecescesecesetsecesctsecesstseceesesecesetsecesseseceesesees 22 2o EO MOO Q P 24 EISParaeterisdtlol sessa eE RU xe a sepe Rd dosuntE R eia 25 AL Be rp3ult ConbbPuldtiofiouu es secs E du pile DEM e te idR EI MIS 25 3 1 1 A Configuration Tab scsessusixenicsteiisnadisiiumdutestidetuu loas ppt diiharnuad ae ries mE 26 3052 IBLSOerpolntS PADuicsssisrssdiatesesdkuears odeur Cbbasdu EEEE 29 http www zennio com Technical Support http zennioenglish zendesk com 2 Zennio Hospitality Thermostat 3 1 3 C Room Occupancy Settings Tab ccccccccccsssecccessececeeececeeseeeseeseceseenecesseees 31 3 1 4 D Additional Settings D ussssesestetsishtezeiwsnesta eontocxpuno SS bhUc iube e Dukan dvo Dead ste aed EXE optas 34 SALS AEL MEETS 38 ALD Aeae Ta eE ree eee 40 sTo ZPO OTO a e a E E A E E 41 SMS PICON RR m UU TT 41 SEF
31. ion to introduce a hidden offset over the user setpoint and to activate or deactivate it by object This offset which is imperceptible for the guest can be useful for power saving but makes it necessary to distinguish between 9 The User Comfort Setpoint i e the value shown to the guest http www zennio com Technical Support http zennioenglish zendesk com Zennio Hospitality Thermostat 9 The Real Comfort Setpoint i e the value that is actually considered by the thermostat It is calculated as the User Comfort Setpoint plus or minus depending on whether cooling or heating the configured offset The reference temperature shown to the guest is also affected by the above offset hence making it necessary to distinguish between 9 The Room Temperature shown to the user 9 The Effective Temperature i e the real reference temperature 2 3 1 3 USER COMFORT SETPOINT CONSTRAINTS The integrator can impose in parameters upper and lower limits to the User Comfort Setpoint with the aim of preventing the guest from setting temperatures too far away from the System Comfort Setpoint Such restrictions are defined in absolute terms a minimum temperature e g 15 C and a maximum temperature e g 30 C that should never be exceeded no matter which the system setpoint is Note that the latter needs to be greater than the former to avoid malfunction The restrictions may be hidden to the room guest or not In
32. it changes to unoccupied See section 2 3 2 2 Sold Unsold Room Object enables or disables the HTx C Sold Unsold Room input binary object which should receive the value 1 from the room managing system when the room becomes sold and the value O0 when it becomes unsold See section 2 3 2 2 Mode to Activate after Switching to Occupied selects the special mode that will be triggered by the thermostat when the room state switches to occupied see section 2 3 2 2 It can be Comfort Standby Economy or Last Mode In case of choosing the latter two new parameters will be shown gt Default Mode sets the default special mode either Standby of Economy that will be triggered in case the last mode was other than Comfort see section 2 3 2 2 gt Comfort to Default Mode 0 Disabled sets a timeout 0 to 255 seconds minutes or hours so in case the room remains unoccupied for more than such time the special mode that will be triggered once occupied again will be the default mode even if the last mode was Comfort see section 2 3 2 2 The value 0 disables the function http www zennio com Technical Support http zennioenglish zendesk com 32 Zennio Hospitality Thermostat Note this value can be overwritten through the HTx C Transition Time Comfort to Default Mode two byte object 9 Setpoint after Returning to Comfort Mode defines the setpoint the t
33. it is important to first read the initial sections of this user manual GENERAL tS UD NT Control Methad 2 point Control 4 Hospitality Thermostat 1 1 IEEE TCI uale Lower Hysteresis 10 x Q 1 C B Setpoints konm E cuperet Upper Hysteresis 10 x O 1 C D Additional Settings E Scenes Resending Period B Cooling 0 Disabled m um Additianal Heating No Figure 20 Heating Control Method selects the control algorithm to be applied The options are 2 Point Control section 3 1 6 1 and PI Control section 3 1 6 2 9 Resending Period sets every how much time between 1 and 255 seconds minutes or hours the control variable i e object HTx Heating Control Variable will be sent to the bus The value 0 disables the sending 9 Additional Heating enables or disables the Additional Heating function see section 2 6 When enabled the HTx Heating Additional Heat one bit object will become available as well as the parameters Additional Heating Band which takes values between 100 and 5 tenths of a degree and Resending Period which takes values between 1 and 255 seconds minutes or hours the value 0 disables the sending Additional Heating Yes Additional Heating Band 25 Ms x 0 19C Resending Period 0 Disabled m E Figure 21 Additional Heating http www zennio com Technical Support http zennioenglish zendesk com 4
34. lish zendesk com 6 Zennio Hospitality Thermostat circumstances a setpoint relaxed enough would be appropriate to significantly reduce the power consumption 9 Protection Mode this mode is typically reserved for abnormal situations where external factors are conditioning the room climate control such as repair works or windows being opened In that case a considerably low Heating mode or considerably high Cooling mode setpoint is appropriate so that the climate system can remain off unless extreme temperatures are actually reached The thermostat will necessarily stay at one of the above special modes every time When switching from one mode to another the setpoint temperature will be automatically set to that of the selected mode Although the integrator is free to configure any desired setpoint for each special mode assuring an efficient configuration is encouraged To begin with it is important to ensure the Standby setpoints fall down between the Comfort and Economy or Protection setpoints 35 C 30 C Cooling 27 C 24 C 22 C 19 C 16 C Heating 7 C Figure 1 Setpoints and Special Modes Nevertheless the room manager will be able to modify at any time the setpoints defined in parameters by making use of the communication objects provided for that purpose http www zennio com Technical Support http zennioenglish zendesk com 7 Zennio Hospitality Thermostat 2 3 1 GUEST
35. nction and whether it is one type or another please refer to its specific user manual This user manual is exclusively referred to the Hospitality Thermostat Important depending on the device and the thermostat type the behaviour and the available functions may differ The user manual of the thermostat module has been particularised for every Zennio device To access the proper user manual it is always recommended to make use of the specific download links provided at the Zennio website www zennio com within the section of the specific device being parametrised http www zennio com Technical Support http zennioenglish zendesk com 4 Zennio Hospitality Thermostat 2 CONFIGURATION 2 1 ON OFF SWITCH The Hospitality Thermostat is designed to typically remain switched on performing the room control both when the guest is present who will only need to care about defining a comfort temperature setpoint and the desired working mode comfort or a more relaxed mode and also in their absence being in such case the Building Management System responsible for determining the control parameters However if desired it is possible to switch on and off the module by means of a dedicated object and to define the initial state in parameters 2 2 TEMPERATURE Prior to describing the thermostatic control process some basic concepts must be mentioned 9 Temperature setpoint this is the target temperature to
36. ne can be parameterised to cause a switch on On or a switch off Off of the thermostat In case an order is received to save the scene the parameterised value will be overwritten with the current on off state of the thermostat unless No change has been parameterised Mode Cooling Heating On the execution of the scene the thermostat will switch to the desired operation mode Cooling Heating No change which should be set in parameters In case of saving the scene the value parameterised will be overwritten with the current value of the status object unless No change has been parameterised Note if the thermostat has been configured for only heating or only cooling this option will not be available 9 Special Mode he execution of the scene can also trigger a certain special mode Comfort Standby Economy Protection or No change In case of saving the scene the above value will be overwritten with that of the current special mode unless No change has been parameterised http www zennio com Technical Support http zennioenglish zendesk com 22 Zennio Hospitality Thermostat Example Executing and Running Thermostat Scenes Suppose the first scene is assigned number 32 and an action consisting in a switch on of the thermostat and the activation of the Comfort special mode leaving the H C mode as Is The option of saving scenes is also enabled 9 Case 1 being the thermostat on and
37. ng devices heat pumps etc in case they are available This way it is possible to perform an even more effective thermostatic control by combining multiple climate systems for the same purpose which will report a higher comfort level As an example of this function think of a room where the primary climate system is a radiant floor system which is known to have a high thermal inertia and a moderately slow response after setpoint changes and a split air conditioner working as a support system being the latter capable of a faster response upon significant setpoint changes To configure the Additional Cooling Heating function it is necessary to define a certain temperature range or band that will determine when the auxiliary system should come into operation Once defined the behaviour is as follows 9 Cooling Mode as soon as the reference temperature is found to be greater or equal than T being T equal to the setpoint temperature plus the Additional Cool band the auxiliary cool system will come into operation to provide a more effective cooling Then it will switch off once the reference temperature is lower or equal than T 0 5 C Example Additional Cooling Suppose a setpoint temperature of 23 C and an Additional Cool band of 2 C In such case the additional cooling will interrupt at 24 5 C Additional Cooling ON Additional Cooling OFF gt Additional Cool 252 24 52 band 239C 29C
38. objects with a higher priority and with that value at the same time therefore the value 0 necessarily deactivates a mode The priority is set according to the following order Protection Comfort Standby Economy Additionally the integrator can make use of a specific parameter to set the default special mode that should remain active in case all the aforementioned one bit objects are found to have the value 0 A parameter is also provided to define whether leaving from the Comfort special mode should maintain the current operation mode Heating Cooling see section 2 4 as long as no mode switches are received or immediately change to the mode that may be active in the room managing system 2 3 2 2 ACCORDING TO THE ROOM OCCUPANCY opecial mode transitions can take place depending on the following room states Sold Room 9 Sold Unsold depending on whether the room has been assigned to a guest or not according to the room managing system Occupied Unoccupied depending on whether the guest is actually inside according to the presence detectors in the room Sold Unsold Transitions 9 When the room state changes from Unsold to Sold the thermostat assumes http www zennio com Technical Support http zennioenglish zendesk com 10 Zennio Hospitality Thermostat it is initially Unoccupied and triggers the Standby special mode The User Comfort Setpoint is reset to the system
39. offset two values need to be distinguished the real room temperature and the effective room temperature 2 3 SPECIAL MODES Comfort Standby Economy Protection The Hospitality thermostat must always remain at a certain special mode Comfort Standby Economy or Protection also known as Building Protection Each of them defines its own pair of setpoint temperatures one for the Cooling function and one for the Heating function see section 2 4 pre set in parameters by the integrator although modifiable in runtime by the room manager Whenever the situation changes e g the room occupancy status the system will switch to the special mode that best fits the new circumstances Comfort Mode this mode is intended to perform usual climate control i e while there are guests present in the room Therefore the setpoint values under this special mode should guarantee their comfort e Standby Mode this mode is intended for short periods during which the room remains empty for example when the guest leaves the room with the intention of getting back afterwards or for guests who want to disconnect the climate system In such case it is possible to slightly relax the setpoint values to reduce the power consumption e Economy Mode this mode is intended for longer periods of no presence in the room For example when the room has not been hired yet Under these http www zennio com Technical Support http zennioeng
40. ontrol Profiles for the Cooling Mode These values have been obtained empirically and are therefore optimised for the most common climate control contexts Making use of them is highly encouraged leaving the manual configuration of these values for very specific situations and for specialists with experience in advanced climate control http www zennio com Technical Support http zennioenglish zendesk com 45 Zennio Passion for KMX innovation Join and send us your inquiries about the Zennio devices http zennioenglish zendesk com Zennio Avance y Tecnolog a S L C R o Jarama 132 Nave P 8 11 45007 Toledo Spain Tel 34 925 232 002 Fax 34 925 337 310 uper KNX C RoHS
41. r deactivates this function during the algorithm application see section 2 5 2 In case of selecting any of the pre set values for the control parameters this option will be implicitly activated http www zennio com Technical Support http zennioenglish zendesk com 43 Zennio Hospitality Thermostat 3 1 7 COOLING TAB The Cooling tab lets the integrator set the algorithm and all the parameters involved in the Cooling working mode of the thermostat For a proper configuration it is important to first read the initial sections of this user manual GENERAL M Control Methad 2 point Control 4 Hospitality Thermostat 1 M M A CONFIGURATION Tepa Mace cles Independent objects for heating and cooling B Setpoints ea E C Room Occupancy Settings Lower Hysteresis 10 x 19C D Additional Settings E Scenes Upper Hysteresis 10 x D 19C Cooling m T Heating Resending Period G 0 Disabled EE Additional Cooling Ma Figure 25 Cooling The configuration is analogous to that of the Heating tab see section 3 1 6 although some minor differences apply 9 The pre set options for the Control Parameters are in this case Cooling Ceiling Blow Convector and A C Split see ANNEX Pre set Values for the PI Control apart from the Advanced option which lets the integrator enter custom values for K and T e n the particular case of having the t
42. re preventing a continuous commutation between Heating and Cooling Example Two Point Hysteresis Suppose an initial real setpoint of 25 C with upper and lower hysteresis of 1 C for the Heating mode and an ambient temperature of 19 C The system heats the room until it reaches 25 C It will continue heating until it becomes 26 C which is the upper limit of the hysteresis band The climate system will then shut down and will remain off until the ambient temperature is lower than 24 C not 25 C after which it will turn on again This algorithm throws a very particular graph http www zennio com Technical Support http zennioenglish zendesk com 15 Zennio Hospitality Thermostat The main disadvantage of this algorithm when compared to other advanced systems is the permanent fluctuation around the setpoint temperature which has a direct impact on the power consumption and on the comfort The red colour sections correspond to periods of unnecessary power consumption and of lack of comfort due to excessive heat On the contrary the blue colour sections indicate a lack of comfort due to insufficient heating Figure 3 Lack of Comfort The two point hysteresis control will be restarted when any of the following occurs 9 The current operation mode Cooling Heating changes 9 The current special mode changes 9 The real setpoint temperature changes 49 The thermostat is switched on 49 The devi
43. rt up after a download 9 Sending Statuses on Bus Voltage Recovery sets whether the device should send the KNX bus the thermostat state objects after the start up Sending their updated value is also possible after a certain delay after the start up defined through Sending Delay 0 255 seconds Sending Statuses on Bus Voltage Recovery Yes sending Delay Figure 10 Sending the Status on Bus Voltage Recovery 9 Scenes enables disables the Scenes function of the thermostat and therefore the corresponding specific tab in the menu on the left see section 3 1 5 and the HTx A Scene Input object intended for the reception of scene commands from the KNX bus Note the THTx A Scene Input object will show as long as the Scenes function has been enabled either from this parameter or from the C Room Occupancy Settings tab see section 3 1 1 as the same object serves to both purposes http www zennio com Technical Support http zennioenglish zendesk com 28 Zennio Hospitality Thermostat 3 1 2 B SETPOINTS TAB Depending on the thermostat function set in the A Configuration tab the view of the following window may change showing the Heating and or Cooling setpoints GENERAL Cooling 4 Hospitality Thermostat 1 A CONFIGURATION Comfort Setpoint 24 00 x 1 C B Setpoints C Room Occupancy Settings Stand by Setpoint 27 00 x 1 C D Additional
44. setpoint value it is possible to read the object IHTx B Real Setpoint Status Observe that both objects are automatically sent to the KNX bus when their value changes Finally the user setpoint can be reset i e it will be assigned the value of the system Comfort setpoint at any time by sending one 1 to object IHTx B User Comfort Setpoint Reset 49 Standby Setpoint defines the initial values of the Standby setpoints that will be applied after downloading The range of the values is from 20 C to 100 C The default values are 27 C for Cooling and 19 C for Heating mode The setpoint of the Standby special mode can be modified through specific bus objects gt I HTx B Standby Setpoint Cooling and HTx B Standby Setpoint Heating 9 Economy Setpoint defines the initial values of the Economy setpoints that will be applied after downloading The range of the values is from 20 C to 100 C Default values are 16 C for Cooling and 27 C for Heating mode The setpoint of the Economy special mode can be modified through specific bus objects gt HTx B Economy Setpoint Cooling and HTx B Economy Setpoint Heating Overheating Protection Setpoint or Freezing Protection Setpoint defines the Protection setpoints that will be applied after programming The range of the values is from 20 C to 100 C Default values are 35 C for Cooling and 7 C for Heating mode The setpoint of
45. sets upper and lower limits to the user Comfort setpoint so the thermostat ensures that the effective setpoint does never exceed the desired range User Comfort Setpoint Constraints El Lower Limit 15 00 x 1 C Upper Limit 30 00 x TC Restrict the State Object to the Setpoint Limit Figure 15 User Setpoint Constraints http www zennio com Technical Support http zennioenglish zendesk com 35 Zennio Hospitality Thermostat Enabling the Restrict the State Object to the Setpoint Limit parameter will make this restriction invisible for the room guest as the status object will not be truncated see section 2 3 1 3 These constraints can be overwritten through objects HTx D Comfort Lower Limit and HTx D Comfort Upper Limit 9 Eco Mode Notification enables or disables the Eco Mode function see section 2 8 and the involved notifications If enabled the following parameters will be shown gt Cooling Lower Limit sets the lowest setpoint temperature that will be admitted as eco while in the Cooling mode Heating Upper Limit sets the highest setpoint temperature that will be admitted as eco while in the Heating mode Eco Mode Notification w Cooling Lower Limit 23 00 x 1 C Heating Upper Limit 23 00 x PC Figure 16 Eco Mode settings The above limits can be modified through objects gt HTx D Eco Mode Lower Limit Cooling gt HTx D Eco Mode Upper Limit Heatin
46. stat 2 5 3 CONTROL UNDER THE PROTECTION SPECIAL MODE With independence of the parameterised control type two point hysteresis or Pl under the Protection special mode a variant of the two point control algorithm will be applied with the following hysteresis values 9 For the Heating mode lower hysteresis of 0 C and upper hysteresis of 1 C 49 For the Cooling mode lower hysteresis of 19C and upper hysteresis of 0 C The outputs will behave as on off if a two point control was configured the output variable will take the values 0 and 1 while in the PI control it will still consist in Os 096 and 1s 100 but sent periodically Example Control under the Protection mode Suppose a setpoint for the Building Protection special mode of 7 C and 35 C for Heating and Cooling respectively and a PI control with a percentage type signal Case 1 while in the Heating mode a control signal of 100 will be sent as soon as the reference temperature reaches 7 C and of 0 as soon as it is 8 C or more Case 2 while in the Cooling mode a control signal of 10096 will be sent as soon as the reference temperature reaches 35 C and of 0 as soon as it is 34 C or less http www zennio com Technical Support http zennioenglish zendesk com 19 Zennio Hospitality Thermostat 2 6 ADDITIONAL COOLING HEATING The Hospitality thermostat is capable of controlling secondary heat cool sources air conditioni
47. under the Cooling and Standby modes when the order to execute the scene arrives bus value 31 it will switch to Comfort 9 Case 2 being the thermostat off when the order to execute the scene arrives it will switch on and change to Comfort remaining in the Heating Cooling mode it already had before having been switched off 9 Case 3 being the thermostat off and being Heating and Economy the last active modes an order to save the scene bus value 159 arrives Scene with number 32 gets therefore updated with the current state of the thermostat it will now consist in switching the thermostat off and triggering the Economy special mode note that the Cooling Heating operation mode is not saved due to the original parameterisation Afterwards being the thermostat on and under the Cooling and Comfort modes if the scene execution order is received bus value 31 it will switch off and activate the Economy special mode leaving the operation mode in Cooling according to what was saved http www zennio com Technical Support http zennioenglish zendesk com 23 Zennio Hospitality Thermostat 2 8 ECO MODE This functionality allows the room manager monitoring the ratio of the room occupation time during which the User Comfort Setpoint fell within the ecological limits according to the criterion of the room manager This can be useful for example to reward or encourage eco friendly guests 9 Occupie
48. ve mode will be zero The sending period should be configured for each mode Heating Cooling from its specific parameter tab 9 Reference Temperature determines the source of the reference temperature This may be the value of a sole two byte communication object HTx A Temperature Source 1 or a combination of two two byte objects HTx A Temperature Source 1 and HTx A Temperature Source 2 with a configurable proportion These objects should be themselves linked to those that report the temperature measurement e g the object of the internal temperature probe See section O 9 Thermostat Always On sets whether the thermostat should remain always on Yes or on the contrary whether it should be possible to turn it on off externally No http www zennio com Technical Support http zennioenglish zendesk com 2 Zennio Hospitality Thermostat Thermostat always ON No Startup Setting on Bus voltage Last before Bus failure ki recovery Do ee Figure 9 Thermostat Always On In the second case two new binary communication objects HTx On Off and HTx On Off status will show in ETS as well as the following parameters gt Start up Setting On Bus Voltage Recovery sets the start up state of the thermostat after a power failure or an ETS download Off On or Last Last will be considered as Off on the very first sta
49. ween 1 and 30 seconds the control signal should stay unchanged in order to prevent rapid relay commutations gt If the switching time is lower than the minimum sets what to do when the control signal needs to switch its state faster than what the above parameter allows Switch the control signal using the minimum time i e delay the commutation or Keep the control signal with its value do not perform the state switch 9 PI Cycle sets every how much time 1 to 255 minutes or seconds the required degree of openness of the valve or in the case of the PWM http www zennio com Technical Support http zennioenglish zendesk com 42 Zennio Hospitality Thermostat modulation the proportion between the intervals the signal is 1 and 0 will be re calculated 9 Control Parameters defines the desired values for the K and T parameters of the PI algorithm It is highly encouraged to make use of the pre set values Warm Water Floor Heating Electric Heating Blow Convector or A C Split see ANNEX Pre set Values for the PI Control however it is possible to specify custom values Advanced Selecting the latter brings the following parameters gt Proportional Band defines the value for K the proportional constant between 1 C and 15 C gt Integral Time sets a value for T between 5 and 255 minutes gt Restart Accumulated Error on Saturation activates o
50. which should fit the most common climate situations see ANNEX Pre set Values for the PI Control Regarding the control signals of the PI mode they can be expressed in two forms Continuous PI the control variable will throw percentage values thus indicating how much the valve or grille that regulates the climate system should open For instance a value of 50 will indicate that valve must remain half open Of course this method only applies to advanced systems where the valves accept intermediate positions 9 PWM Pulse Width Modulation the control variable will be binary being this way possible to control on off valves with no intermediate positions Partial opening of the valve for example at 50 is therefore emulated by successively opening closing it entirely for similar time portions 9 To prevent repeatedly opening and closing the valves it is possible to define a minimum PWM signal commutation time In addition it is possible to specify what to do in case a PWM time lower than the minimum time is required commuting the control signal applying the minimum time or ignoring the commutation http www zennio com Technical Support http zennioenglish zendesk com 17 Zennio Hospitality Thermostat Note for a proper behaviour of this kind of control it is necessary that the PI cycle time is at least twice the minimum PWM commutation time Example PI control with PWM Let a continuous P
51. wo operating modes of the thermostat enabled Heating and Cooling see section 3 1 1 this window will include the following parameter gt Control Variables sets whether to send the control orders through the same communication object both under the Cooling and the Heating modes One Object for both Heating and Cooling or whether to send the Heating orders and the Cooling orders through separate objects Independent Objects for Heating and Cooling which is the option selected by default Note if One Object for both Heating and Cooling is combined with Send Both H C Control Signals Periodically see section 3 1 1 the latter will be ignored the thermostat will only send the value of the control variable of the current mode http www zennio com Technical Support http zennioenglish zendesk com 44 Zennio Hospitality Thermostat ANNEX PRE SET VALUES FOR THE PI CONTROL The tables below show the different profiles for the PI Control that have been pre set in the Hospitality thermostat together with the corresponding values of K and T Profile K T minutes Restart Accumulated Error Warm Water 5 150 Yes Floor Heating 5 240 Yes Electric Heating 4 100 Yes Blow Convector 4 90 Yes A C Split 4 90 Yes Table 3 PI Control Profiles for the Heating Mode Profile K T minutes Restart Accumulated Error Cooling Ceiling 5 240 Yes Blow Convector 4 90 Yes A C Split 4 90 Yes Table 4 PI C
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