Gewiss Chorus GW 10 763 User manual

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Easy thermostat
GW 10 763
GW 14 763
Technical Manual

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Summary
1Introduction ................................................................................................................................................ 3
2Application ................................................................................................................................................. 4
2.1Limits to the associations................................................................................................................... 4
3“Settings” menu ......................................................................................................................................... 5
3.1Parameters ........................................................................................................................................ 5
3.2Communication objects ..................................................................................................................... 5
4“Main” menu............................................................................................................................................... 6
4.1Parameters ........................................................................................................................................ 6
4.2Communication objects ..................................................................................................................... 8
5“Temperature setpoint” menu.................................................................................................................... 9
5.1Parameters ........................................................................................................................................ 9
5.2Communication objects ................................................................................................................... 10
6“Control algorithm” menu......................................................................................................................... 11
6.1Parameters ...................................................................................................................................... 11
6.2Communication objects ................................................................................................................... 19
7“Reports” menu........................................................................................................................................ 21
7.1Parameters ...................................................................................................................................... 21
7.2Communication objects ................................................................................................................... 23

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1 Introduction
This manual describes the functions of the devices named GW1x763 “Easy thermostat” and how to use the
ETS configuration software to change the settings and configurations.

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2 Application
The Easy thermostat allows you to manage the temperature in the area it is installed in. The temperature is
regulated by the KNX/EIB actuators which are managed by the Home Automation KNX/EIB bus and control
the heating or air conditioning elements, including the fan coils. When combined with the wall Easy Timer
Thermostat (GW 10 761 - GW 14 761), from which it receives the operation type and mode via the bus, it is
possible to create multi-zone thermal regulation systems. The set-point values used by the thermostat are
set locally.
The device manages two operating modes, HEATING and AIR CONDITIONING, and controls both systems
whilst providing 4 different operating modes for each operating mode
(ECONOMY/PRECOMFORT/COMFORT/OFF), each with its own customisable setpoint.
The device is always able to autonomously manage the temperature in the environment it is installed in,
using control algorithms (two points or PI) or the use of fan coils, depending on the type of system built.
The thermostat is only able to manage the heating and air conditioning system if it is a 4-pipe configuration
as it is designed to manage one actuator for the heating system and another for the air-conditioning system;
This manual refers solely to the configuration using the ETS software.
Please refer to the INSTALLATION AND USER MANUAL supplied with the product for instructions on how to
use the internal menu and the various local key functions.
2.1 Limits to the associations
Maximum number of group addresses: 110
Maximum number of logical associations: 110
This means that it could be possible to define maximum 110 group addresses and realize maximum 110
associations between group addresses and communication objects.

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3 “Settings” menu
Here it is possible to configure the programming mode between ETS mode (S-Mode) and Easy mode by the
Easy controller software (Kit GW90837, Kit GW90838, GW90840) see Diag 3.1.
Diag. 3.1
3.1 Parameters
¾3.1.1 Programming mode
This parameter determines the programming mode of the device:
•ETS mode
Select this value if you want to configure the device with ETS (S-Mode); all the configuration parameters
are now visible.
•Easy mode
Select this value if you want to configure the device with the Easy controller software.
Remember to download the application program with this value selected before using the device by the
Easy controller software if you have already used the device in an ETS project.
3.2 Communication objects
There are no communication objects enabled by the Settings menu.

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4 “Main” menu
The Main menu lists all the parameters needed to configure the behaviour of the device in HVAC system
(see Diag. 4.1); the structure and the options displayed in the Main menu change according to the settings
for the various options.
Diag. 4.1
4.1 Parameters
¾4.1.1 Operating mode:
This allows you to configure how the device is used; the settings are:
•slave
The device is configured to manage the HVAC system using the master device as a timer-thermostat.
With this configuration the device does not control the entire system, but only a part of it, called a zone,
whilst a master device is installed which controls the operating types and HVAC modes; in this case the
thermostat controls the ambient temperature where it is installed, whilst the master device manages the
operating functions according to the settings configured by the operator. In this function mode the
thermostat uses the set-point values that are set locally. It is possible to change the set temperature set-
point (max variation ± 3 °C), whilst it is not possible to change the operation mode. The modified set-
point will remain valid until the Master device sends a new operation mode.
With this setting, the HVAC mode input and Operating type input communication objects are now
visible.
•stand alone
The device is configured to autonomously manage the HVAC system, without the use of timer-
thermostats that control the device functions; with this configuration you create a single ambient
temperature control centre. The thermostat operation type and mode are set locally. The operation
status does not depend on any other device. In Stand-alone mode it is possible to vary the set-point at
will and enable the thermostat to receive remote commands from other devices, such as for instance a
button or the EIB Easy GSM remote control module GW 90 861.

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With this setting, the Operating type and mode command execution parameter appears, which will be
analysed in paragraph 4.1.2.
¾4.1.2 Operating type and mode command execution:
This enables the device to receive the HVAC mode and operating type setting commands from the bus;
the settings are:
•deactivated
It is not possible to modify the HVAC mode or operating type on the device by bus command; both
parameters can only be set using the local keyboard.
•active
It is also possible to modify the HVAC mode or operating type on the device by bus command; both
parameters can however be set using the local keyboard.
With this setting, the HVAC mode input and Operating type input communication objects are now
visible.
¾4.1.3 Scenes function:
This is to enable the scene function and make the relative Scene communication object visible. The
scene function sends two possible commands to the device:
−execute scene, that is a command to create a specific condition
−store scene, that is a command to memorise the current status (at the moment the command is
received) of the HVAC mode, operating type and any indicated setpoint temporary forced
positioning.
This function foresees 8 different scenes, so the device can memorise /reproduce 8 different operating
modes and types. The settings are:
•deactivated
The scene function is not enabled and consequently the communication object is not visible.
•active
The scene function is enabled and is managed by the Scene communication object.

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4.2 Communication objects
The Main menu makes the following communication objects visible (see Diag. 4.2.):
Diag. 4.2
¾4.2.1 HVAC mode input
Here you can configure the remote control of the device operating mode (HVAC mode) by bus
command. When this communication object receives a telegram with the operating mode information
that is to be set, the device sets the operating mode according to the command received, indicated by a
pilot light on the display.
If the device has been configured in stand alone mode, it is still possible to modify the operating mode
using the local navigation menu on the device, which does nothing more than replicate the command
reception event on the communication object in question to modify, with each pressing, the operating
mode.
The enabled flags are C (communication), W (written by bus), R (read by bus), T (transmission) and U
(actualize the value).
The standard format of the object is 20.102 DPT_HVACMode, the size of the object is 1 byte and the
commands it receives are operating mode commands: Economy/Precomfort/Comfort/Off.
¾4.2.2 Window status
Here you can enable the remote control of the device OFF operating mode (or HVAC mode) by bus
command, when a windows is open. When this object receives a telegram with a "1" logic value (window
open), the device instantly switches to OFF mode, indicated by a pilot light on the display, given the
enabling of this object has a higher priority than any other HVAC setting; vice versa, when this object
receives a "0" logic value (windows closed), the device instantly disables the OFF operating mode and
the new operating mode is enabled automatically by the device according to the last command received
(HVAC mode or scene) or the HVAC mode installed before windows status activation.
The enabled flags are C (communication), W (written by bus).
The standard format of the object is 1.019 DPT_Window_Door, the size of the object is 1 bit and the
commands it receives are windows status open/close.
¾4.2.3 Scene
Using this communication object, the device is able to receive the execute and store scene commands
from the bus.
On receiving a store scene command, through a bus telegram to the communication object in question,
please remember that the device memorises the HVAC mode, operating type and any temporary forced
setpoint.
The enabled flags are C (communication), W (written by bus).
The standard format of the object is 18.001 DPT_SceneControl, the size of the object is 1 byte and the
commands it receives are execute/store scene.
¾4.2.4 Operating type input
Here you can configure the remote control of the device function type by bus command. When this
object receives a telegram with a "1" logic value, the device sets the operating type to HEATING,
indicated by a pilot light on the display, maintaining the same operating mode as before; vice versa,
when this object receives a telegram with a "0" logic value, the device sets the operating type to AIR
CONDITIONING, indicated by a pilot light on the display, maintaining the same operating mode as
before. In any case, it is however possible to modify the operating type using the local navigation menu
on the device.
The enabled flags are C (communication), W (written by bus).
The standard format of the object is 1.100 DPT_Heat/Cool, the size of the object is 1 bit and the
commands it receives are operating type commands: Heating/Air conditioning.

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5 “Temperature setpoint” menu
The Temperature setpoint menu lists all the parameters needed to configure the setpoint values for the
various HVAC modes and the two different operating types (see diag. 5.1).
Please remember that among the various setpoints belonging to the same function type, there is a setting
value threshold determined from what seen below:
-T
antifreeze
≤Teconomy ≤Tprecomfort ≤Tcomfort in heating (“T” indicates the standard mode setpoint value)
-T
comfort
≤Tprecomfort ≤Teconomy ≤Thigh temp. protect. in air conditioning (“T” indicates the standard mode setpoint
value)
Whilst a control is made over the modifications to setpoints from the local menu to make sure the threshold is
not exceeded, the operator is requested to avoid setting setpoints for ETS parameters that do not comply
with the above threshold as this could cause the device to malfunction.
Diag. 5.1
5.1 Parameters
¾5.1.1 Setpoint modification via keyboard
This allows you to enable the viewing of the device operating setpoints in the local navigation menu; the
settings are:
•deactivated
When you access the local navigation menu the parameters that allow you to modify the operating
setpoints on the device are not visible (for further information on these parameters, please consult the
INSTALLATION AND USER MANUAL).
•active
When you access the local navigation menu the parameters that allow you to modify the operating
setpoints on the device are visible (for further information on these parameters, please consult the
INSTALLATION AND USER MANUAL).

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¾5.1.2 Heating antifreeze setpoint: (tenth of °C)
Here you can set the setpoint value for the OFF mode when it is HEATING operating mode; the values
range from 20 (2 degrees centigrade) to 70 (7 degrees centigrade).
The restrictions listed before must be complied with when setting this value.
This value can in any case be modified by the operator using the setting in the local navigation menu on
the device (if setpoint modification via keyboard is enabled).
¾5.1.3 Heating economy setpoint: (tenth of °C)
Here you can set the setpoint value for the ECONOMY mode when it is HEATING operating mode; the
values range from 50 (5 degrees centigrade) to 400 (40 degrees centigrade).
The restrictions listed before must be complied with when setting this value.
This value can in any case be modified by the operator using the setting in the local navigation menu on
the device (if setpoint modification via keyboard is enabled).
The features, functions and restrictions listed above also apply to the Heating precomfort setpoint:
(tenth of °C), Heating comfort setpoint: (tenth of °C) parameters for the HEATING operating type.
¾5.1.4 Air cooling high temperature protection setpoint: (tenth of °C)
Here you can set the setpoint value for the OFF mode when it is AIR CONDITIONING operating mode;
the values range from 300 (30 degrees centigrade) to 400 (40 degrees centigrade).
The restrictions listed before must be complied with when setting this value.
This value can in any case be modified by the operator using the setting in the local navigation menu on
the device (if setpoint modification via keyboard is enabled).
¾5.1.5 Air cooling economy setpoint: (tenth of °C)
Here you can set the setpoint value for the ECONOMY mode when it is AIR CONDITIONING operating
mode; the values range from 50 (5 degrees centigrade) to 400 (40 degrees centigrade).
The restrictions listed before must be complied with when setting this value.
This value can in any case be modified by the operator using the setting in the local navigation menu on
the device (if setpoint modification via keyboard is enabled).
The features, functions and restrictions listed above also apply to the Air cooling precomfort setpoint:
(tenth of °C), Air cooling comfort setpoint: (tenth of °C) parameters for the AIR CONDITIONING
operating type.
5.2 Communication objects
There are no communication objects enabled by the Temperature setpoint menu.

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6 “Control algorithm” menu
The Control algorithm menu lists all the parameters used to set the control algorithms for the heating and
air conditioning system; the structure and the options displayed in the Control algorithm menu change
according to the settings for the Control type parameter.
6.1 Parameters
If the control type selected is two points control (On/Off),the menu is shown in diag. 6.1.
¾6.1.1 Control type: two points control (On/Off)
Diag. 6.1
•two points control (On/Off)
The algorithm used to control the heating system is the classic algorithm defined as a two points control.
This control type turns the heating system ON and OFF according to a hysteresis cycle, that is there is
no single threshold that discriminates the ON and OFF command but two are identified (see Diag. 6.2).

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Diag. 6.2
You can see in this diagram that there are two thresholds which control the ON and OFF commands for
the heating system and two for air conditioning system; for heating system, the first threshold consists in
the “setpoint-∆TH“ (where ∆TH identifies the heating regulation differential value) value, below which the
device switches the system ON, the second consists in the indicated setpoint value, over which the
device switches the system OFF.
For air conditioning system, the first threshold consists in the “setpoint+∆TAC“ (where ∆TAC identifies the
air conditioning regulation differential value) value, over which the device switches the system ON, the
second consists in the indicated setpoint value, below which the device switches the system OFF.
With this setting, the Heating regulation differential (tenth of °C) and Air conditioning regulation
differential (tenth of °C) parameters are visible.
In order to avoid continuous switchings that can damage the valves, the thermostat will wait for up to 2
minutes before sending the activation command to the actuator that controls the thermal regulation
system.
¾6.1.2 Heating regulation differential (tenth of °C)
Here you can set the heating regulation differential value which, subtracted from the indicated setpoint
value, determines the threshold value below which the heating system is switched ON upon two points
control.
The settings range from 2 (tenths of degrees centigrade) to 20 (tenths of degrees centigrade).
¾6.1.3 Air conditioning regulation differential (tenth of °C)
Here you can set the air conditioning regulation differential value which, added from the indicated
setpoint value, determines the threshold value over which the air conditioning system is switched ON
upon two points control.
The settings range from 2 (tenths of degrees centigrade) to 20 (tenths of degrees centigrade).
¾6.1.4 Controlled actuators feedback:
This allows you to enable the device so it can receive feedbacks from the actuators (loads) it controls;
the settings are:
•deactivated
The device is not able to receive feedback from the actuators (loads) that the command sent has actually
been performed.
•active
The device is able to receive feedback from the actuators (loads) that the command sent has actually
been performed; if within one minute from sending a command to a load, the latter does not send
confirmation of execution of the command to the thermostat, it will send the command again every
Δ
TH
Δ
TAC
HEATING
AIR CONDITIONING

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minute until it receives due confirmation from the load; the heating/air conditioning system pilot light will
blink to signal this anomaly.
The Heating status feedback and the Air cooling status feedback communication objects are visible.
If the control type selected is PI control (PWM),the menu is shown in Diag. 6.3.
¾6.1.5 Control type: PI control (PWM)
Diag. 6.3
•PI control (PWM)
The algorithm used to control the heating system is the algorithm which allows you to reduce heat inertia
times caused by a two points control, called a PMW control. This control type foresees the modulation of
the pulse duty-cycle, represented by the heating (or air conditioning) system activation time, according to
the difference between the indicated setpoint and the detected temperature (see Diag. 6.4 and Diag.
6.5).
The device keeps the heating (or air cooling) system ON for a percentage of time that depends on the
difference between the measured temperature and the indicated setpoint; the setpoint and “setpoint-∆TH“
values (for heating system) and “setpoint+∆TAC“ and setpoint values (for air conditioning system) are
indicated on the ordinate axis, that determines the proportional band limits within which the device
constantly regulates the heating (or air conditioning) system, modulating the system’s ON and OFF
times. With this type of algorithm there is no hysteresis cycle on the heating element and therefore the
inertia time (system heating and cooling time) introduced by the two points control is eliminated. This
also leads to energy savings as the system does not stay ON for no reason and, once the desired
temperature has been reached, it continues to supply amounts of heat just to compensate any
dispersion of heat in the environment.

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Diag. 6.4
Diag. 6.5
With this setting, the Cycle time for heating control, Cycle time for air conditioning control, Heating
regulation proportional differential (tenth of °C) and Air conditioning regulation proportional
differential (tenth of °C) parameters are visible.
¾6.1.6 Cycle time for heating control
Here it is possible to set the time within which the device must perform PWM modulation. The settings
are provided in the drop-down menu (an interval of from 5 to 60 minutes).
The settings are all multiples of 5 because, as you can see in Diag. 6.4, the duration of the heating
system activation time is expressed as a percentage compared to the cycle time with a step of 20%. This
means that, should the result of the control algorithm lead to a system activation time equal to 40% of
the cycle time, if the value of the latter is 20 minutes, the device will activate the system for 8 minutes
and then deactivate it until the end of the cycle time; at this point the PMW control algorithm is applied
again and the activation time will be duly modified.
cycle time
set point
set point+ΔTAC
AIR CONDITIONING
set point
set point-ΔTH
cycle time
HEATING

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¾6.1.7 Cycle time for air conditioning control
As the air conditioning parameter has the same characteristics and functions, with the only difference
being that it refers to the AIR CONDITIONING operating mode, please refer to the paragraph 6.1.6 for
further information.
¾6.1.8 Heating regulation proportional differential (tenth of °C)
Here you can set the heating PMW regulation differential value which, subtracted from the indicated
setpoint value, determines the lowest limit of the proportional band limits used to modulate the time when
the heating system is switched ON upon PWM proportional control. The settings are provided in the
drop-down menu (an interval of from 0.4°C to 3.2°C).
The settings are all multiples of 0.4 because, as you can see in Diag. 6.4, the proportional band is
divided into four zones and the minimum resolution for the device is 0.1 °C. This value set for this option,
divided by 4, determines the width of the proportional sub-band within which the device determines the
system ON and OFF times.
¾6.1.9 Air conditioning regulation proportional differential (tenth of °C)
As the air conditioning parameter has the same characteristics and functions, with the only difference
being that it refers to the AIR CONDITIONING operating mode, please refer to the paragraph 6.1.8 for
further information.
¾6.1.10 Controlled actuators feedback:
See chapter 6.1.4.
If the control type selected is fan coil,the menu is shown in Diag. 6.6.
¾6.1.11 Control type: fan coil
Diag. 6.6

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•fan coil
The control type applied if the fan coil control is enabled, is similar to the two points control analysed in
the previous chapters; that is it activates/deactivates the fan coil speeds according to the difference in
the configured setpoint and the measured temperature.
The actual difference between the 2 points algorithm is that, in this case, there is not one stage when the
hysteresis cycle is performed to set the ON and OFF speed thresholds, but there are three; this means
that each stage corresponds to a speed and when the difference between the measured temperature
and the configured setpoint determines the activation of a specific speed, the other two must be
deactivated before the new speed can be activated. There are two diagrams below which illustrate how
the speeds to be activated are determined, according to the measured temperature for both the heating
(Diag. 6.7), and air conditioning systems (Diag. 6.8).
Diag. 6.7
The diagram refers to the speed control of the fan coil with three function stages for the heating system.
Looking at the graph, you can see that there is a hysteresis cycle for each stage, and two thresholds are
associated to each speed that determine activation and deactivation. The thresholds are calculated by
the values set for the heating regulation differential, and can be summarised as follows:
-Speed V1 (stage 1): the speed is activated when the value of the temperature is less than the
“setpoint-∆TH” value and deactivated when the temperature reaches the configured setpoint value
(remember that speed 1 is deactivated also when a higher speed is activated)
-Speed V2 (stage 2): the speed is activated when the value of the temperature is less than the
“setpoint-2∆TH” value and deactivated when the temperature reaches the “setpoint-∆TH” value
(remember that speed 2 is deactivated also when a speed V3 is activated)
-Speed V3 (stage 3): the speed is activated when the value of the temperature is less than the
“setpoint-3∆TH” value and deactivated when the temperature reaches the “setpoint-2∆TH“ value
You can see that, once the measured temperature is lower than the “setpoint-∆TH”, value, further to
activate the fan coil speed according to the algorithm analysed before, the thermostat also sends an
open command to the solenoid value that controls the heating system; the solenoid valve is however
closed when the measured temperature reaches the configured setpoint value.
The diagram concerning the air conditioning system can be seen in the diagram below.

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Diag. 6.8
The diagram refers to the speed control of the fan coil with three function stages for the air conditioning
system. Looking at the graph, you can see that there is a hysteresis cycle for each stage, and two
thresholds are associated to each speed that determine activation and deactivation. The thresholds are
calculated by the value set for the air conditioning regulation differential, and can be summarised as
follows:
-Speed V1 (stage 1): the speed is activated when the value of the temperature is greater than the
“setpoint+∆TAC” value and deactivated when the temperature reaches the configured setpoint value
(remember that speed 1 is deactivated also when a higher speed is activated)
-Speed V2 (stage 2): the speed is activated when the value of the temperature is greater than the
“setpoint+2∆TAC” value and deactivated when the temperature reaches the “setpoint+∆TAC” value
(remember that speed 2 is deactivated also when a speed V3 is activated)
-Speed V3 (stage 3): the speed is activated when the value of the temperature is greater than the
“setpoint+3∆TAC” value and deactivated when the temperature reaches the “setpoint+2∆TAC”value
You can see that, once the measured temperature is higher than the “setpoint+∆TAC” value, further to
activate the fan coil speed according to the algorithm analysed before, the thermostat also sends an
open command to the solenoid value that controls the air conditioning system; the solenoid valve is
however closed when the measured temperature reaches the configured setpoint value.
The functions described are applied when the fan coil operating mode is set to AUTO, whilst if it is in
MANUAL mode and the operator sets a specific speed, the speed activation command is set when the
measured temperature is lower than the “setpoint-∆TH” value in heating mode, and lower that the
“setpoint+∆TAC” value in air conditioning mode.
In order to avoid continuous switchings that can damage the valves, the thermostat will wait for up to 2
minutes before sending the activation command to the actuator that controls the thermal regulation
system.
¾6.1.12 Heating regulation differential (tenth of °C):
Here you can set the heating fan coil speed regulation differential (∆TH), used to calculate the correct
speed of the fan coil. The settings range from 2 (tenths of degrees centigrade) to 20 (tenths of degrees
centigrade).
¾6.1.13 Air conditioning regulation differential (tenth of °C):
Here you can set the air conditioning fan coil speed regulation differential (∆TAC), used to calculate the
correct speed of the fan coil. The settings range from 2 (tenths of degrees centigrade) to 20 (tenths of
degrees centigrade).

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¾6.1.14 Controlled actuators feedback:
See chapter 6.1.4. In this case, the communication objects visible are V1 fan status feedback,V2 fan
status feedback, V3 fan status feedback,Heating status feedback and Air cooling status feedback
It is recommended to use the actuators feedback.
The device software has a logic interlock function that allows you to activate a different fan coil speed
from that currently activated only if the correct feedback has been received by the latter that the speed
has been deactivated; until the thermostat receives feedback that the enabled speed has been
deactivated, it will not send activation commands for the new speed, to prevent a series of fan coil
windings being powered at the same time which would break the fan coil.

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6.2 Communication objects
The Control algorithm menu makes the following communication objects visible (see Diag. 6.9.):
Diag. 6.9
¾6.2.1 Heating status feedback
This allows the device to be informed on the status of the actuator that manages the heating system
controlled by the thermostat; once the command has been sent to this actuator, if the device does not
receive confirmation within one minute that the load has executed the command by bus telegram to the
communication object in question, it will instantly send the command again every minute until it receives
due confirmation from the load. The heating/air conditioning system pilot light will blink to signal this
anomaly (according to which is displayed on the screen). If a feedback is received by the actuator that
does not copy the command sent, the device will instantly send another command and trigger the above
described control.
The enabled flags are C (communication), W (written by bus) .
The standard format of the object is 1.001 DPT_Switch, the size of the object is 1 bit and the commands
it receives are the heating system actuator status On/Off.
¾6.2.2 Air cooling status feedback
The same applies as indicated in the previous paragraph, but in relation to the air conditioning system
actuator (please refer to 6.2.1 for further details).
¾6.2.3 Heating switching
This allows the device to send ON/OFF commands to the actuator that manages the heating system
controlled by the thermostat; according to the control algorithm set, the device calculates when it has to
intervene on the heating system to regulate the ambient temperature and therefore sends a telegram
with a “1” logic value to activate the system, and “0” logic value to deactivate the same system.
The enabled flags are C (communication), R (read by bus) and T (transmission) .
The standard format of the object is 1.001 DPT_Switch, the size of the object is 1 bit and the commands
it sends are heating system On/Off.
¾6.2.4 Cooling switching
The same applies as indicated in the previous paragraph, but in relation to the air conditioning system
actuator (please refer to 6.2.3 for further details).
¾6.2.5 Fan V1 switch
This allows the device to send ON/OFF commands to the actuator that manages speed one on the fan
coil. The device calculates the speed to activate on the fan coil to regulate the ambient temperature and
sends a telegram with a “1” logic value to activate speed one and a “0” logic value to deactivate the
same speed.
The enabled flags are C (communication), R (read by bus) and T (transmission) .
The standard format of the object is 1.001 DPT_Switch, the size of the object is 1 bit and the commands
it sends are fan coil speed one ON/OFF.

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¾6.2.6 V1 fan status feedback
This allows the device to be informed on the status of the actuator that manages the speed 1 on the fan
coil; once the command has been sent to this actuator, if the device does not receive confirmation within
one minute that the speed has been activated by bus telegram to the communication object in question,
it will instantly send the command again every minute until it receives due confirmation. The fan coil
control pilot light will blink to signal this anomaly. If a feedback is received by the actuator that does not
copy the command sent, the device will instantly send another command and trigger the above
described control.
The enabled flags are C (communication), W (written by bus) .
The standard format of the object is 1.001 DPT_Switch, the size of the object is 1 bit and the commands
it receives are fan coil speed 1 status: On/Off.
¾6.2.7 Fan V2 switch
The same applies as indicated in the previous paragraph, but in relation to fan coil speed two.
For further details see 6.2.5.
¾6.2.8 V2 fan status feedback
The same characteristics and function apply as indicated in the previous paragraph, the different being
that it refers to the actuator that controls speed 2 on the fan coil (see 6.2.6).
¾6.2.9 Fan V3 switch
The same applies as indicated in the previous paragraph, but in relation to fan coil speed three.
For further details see 6.2.5.
¾6.2.10 V3 fan status feedback
The same characteristics and function apply as indicated in the previous paragraph, the different being
that it refers to the actuator that controls speed 3 on the fan coil (see 6.2.6).