Gewiss Chorus GW 10 795H Owner's manual

GW 10 795H GW 12 795H GW 14 795H
Termostato T+H NX - da incasso
KNX T+H thermostat - flush-mounting
Thermostat T+H NX - à encastrer
Termostato T+H KNX - de empotrar
Thermostat T+H NX - für den Unterputz
MANUALE DI PROGRAMMAZIONE
PROGRAMMING MANUAL - MANUEL DE PROGRAMMATION
MANUAL DE PROGRAMACIÓN - PROGRAMMIERHANDBUCH

CONTENTS
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page
GENERAL DESCRIPTION
Briefly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Position of the commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Description of the commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Control modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
USER INSTRUCTIONS
Thermostat operation statuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Normal operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Setting the parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Pre-set parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
F.A.Q. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

This manual explains the steps for setting the thermostat parameters. All the information
concerning the technical data of the product, the connection diagrams, the descriptions
of the commands, and the instructions for correct assembly are contained in the
installation manual supplied with the product and which can also be downloaded from
the website www.gewiss.com.
4
Briefly
GENERAL DESCRIPTION

GENERAL DESCRIPTION
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The thermostat is equipped with a backlit LCD display and four command push-buttons
that can always be accessed.
ATTENTION!
If the display backlighting is enabled, only the screen will light up when any one of the
4 front button keys is pressed for the first time; press the keys again to implement the
required command.
910
8
7
2
1
3
4
6
18
5
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17
11
15
12
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Position of the commands

GENERAL DESCRIPTION
6
Description of the commands
INFOR ATION ON THE DISPLAY
Clock / NX temperature adjustment probe visualised / Value shown on the humidity page
(Hr = relative humidity; HA = specific humidity; tr = dew point temperature)
Settings menu / Set the values to send to the NX temperature adjustment probe
Heating activation - 1st stage (flame) or 2nd stage (flame+asterisk)
if the flame flashes: no/incorrect reception of heating solenoid valve (1st stage) alert
if the asterisk flashes: no/incorrect reception of heating solenoid valve (2nd stage) alert
Cooling activation - 1st stage (snowflake) or 2nd stage (snowflake+asterisk).
On the humidity page, the asterisk indicates a comfortable environment
if the snowflake flashes: no/incorrect reception of cooling solenoid valve (1st stage) alert
if the asterisk flashes: no/incorrect reception of cooling solenoid valve (2nd stage) alert
Type of operation: heating (winter)
if it flashes: floor temperature alarm in progress
Type of operation: cooling (summer)
Remote command enabling
if it flashes: operation on asis of a remote command
Fan coil operating mode
- speed OFF
- speed 1 (automatic / manual)
- speed 2 (automatic / manual)
- speed 3 (automatic / manual
if the fan flashes: no/incorrect reception of fan coil speed alert
if the segments flash: the speed set (manually or y algorithm) is waiting to e activated
Thermostat in Slave operation
Temperature measured / Temperature, relative humidity, specific humidity, dew point
temperature measured by the NX temperature adjustment probe / Setpoint on NX
temperature adjustment probe input
if it flashes: manual forcing of the setpoint, or end of humidity pro e monitoring time
Temperature measurement unit
Indication of auxiliary input status (I = contact closed, O = contact open)
Thermal residual current device
Visualisation of temperature measured by NX temperature adjustment probe
Thermostat mode
- Economy (in heating mode) - Comfort (in cooling mode)
- Pre-comfort (in heating mode and cooling mode)
- Comfort (in heating mode) - Economy (in cooling mode)
- Anti-freeze/High temperature protection
if the segments flash: the setpoint is temporarily forced
if OFF flashes: manual device switch-off (anti-freeze/high temperature protection)
CO AND PUSH-BUTTONS Symbol
Select operating mode / Confirm
Adjust temperature (+) / Visualise pages
Adjust temperature (-) / Visualise pages
Parameter setting
햲
햳
햴
햵
햶
햷
햸
햹
햺
햻
햽
햾
햿
헀
헁
헂
헃
헄
헅

GENERAL DESCRIPTION
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The thermostat can be set with 2 different control modes:
•Slave: operation depends on the device configured as the Master (e.g. the NX flush-
mounting timed thermostat GW1x794H), that sets the type, operating mode or setpoint
of the thermostat on the basis of the ETS parameterisation. In the first case (modes),
the thermostat uses the set-points configured via ETS. These can be modified locally
and via the BUS if these options are enabled in the ETS configuration. The fixed
temperature setpoint can be temporarily forced, but the operating mode cannot be
altered. The forced setpoint will remain valid until the master device sends a new
operating mode. In the second case (set-points), the thermostat uses the setpoint
received from the master device (but which can always be altered locally).
•Autonomous: the thermostat type and operating mode can be set locally. Operation
is not dependent on any other device. In the autonomous control mode, you can alter
the setpoint as you wish, and enable the thermostat to receive remote mode-setting
commands (OFF/Economy/Pre-comfort/Comfort) and type-setting commands
(Heating/Cooling) from other devices such as a push-button or the GSM NX remote
control.
The thermostat has 4 different operating modes:
• ECONOMY
• PRE-COMFORT
• COMFORT
• OFF - ANTIFREEZE/HIGH TEMPERATURE PROTECTION
In the autonomous control mode, to switch from one HVAC mode (economy, pre-comfort,
comfort, off) to another, use the key: each time it is pressed, the corresponding
setpoint is shown (flashing) for a moment.
In the slave control mode, no local modification of the HVAC mode is allowed; only the
manual switch-off (if enabled) of the device is possible (HVAC OFF).
In the economy, pre-comfort and comfort operating
modes, the thermostat always uses the corresponding
temperature set-points.
The display shows the detected room temperature and the
, or symbol.
Control modes
Operating modes

GENERAL DESCRIPTION
8
MEANING OF
The anti-freeze function is only active in heating mode,
when the temperature adjustment system is switched OFF.
In this case, the thermostat uses the fixed high temperature
temperature setpoint, only reactivating the heating system
if the room temperature falls below TANTIGELO (Tanti-freeze).
The display shows the word OFF, along with the detected
room temperature.
The high temperature protection function is only active
in cooling mode, when the temperature adjustment system
is switched OFF.
In this case, the thermostat uses the fixed high temperature
protection setpoint, only reactivating the cooling system if
the room temperature exceeds TPROTEZIONE ALTE TEMPERATURE
(Thigh temperature protection).
The display shows the word OFF, along with the detected
room temperature.
In the Slave control mode, the display shows the
temperature and the symbol. The thermostat uses the
operating mode or the setpoint value received from the
master device via the BUS.
Symbol
Heating Cooling
Setpoint Operating
mode Setpoint Operating mode
TECONOMY Economy TCOMFORT Comfort
TPRE-COMFORT Pre-comfort TPRE-COMFORT Pre-comfort
TCOMFORT Comfort TECONOMY Economy

GENERAL DESCRIPTION
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During operation, the activation of the heating or cooling mode is indicated in the
following way:
Heating
The symbol indicates that the activation command has
been sent to the command actuator of the boiler or area
solenoid valve (1st stage of the heating system(1)). If the load
notifications have been activated via ETS, and the thermostat
does not receive confirmation of effective implementation
from the actuator, the symbol will begin to flash.
Subsequently, the thermostat sends the activation command
every 60 seconds until it receives confirmation. The
symbol indicates that the 2nd stage of the heating system(1)
has been activated.
Cooling
The symbol indicates that the activation command has
been sent to the command actuator of the conditioner or
area solenoid valve (1st stage of the cooling system(1)). If the
load notifications have been activated via ETS, and the
thermostat does not receive confirmation of effective
implementation from the actuator, the symbol will begin
to flash. Subsequently, the thermostat sends the activation
command every 60 seconds until it receives confirmation.
The symbol indicates that the 2nd stage of the cooling
system(1) has been activated.
Operation with active fan coil control
If the fan coil control function has been activated in the
setting of the parameters via ETS, the display will show the
symbol.
In addition, you will be offered the page on which you can
manually alter the fan coil speed or set the AUTO mode
(whereby the fan coil speed is automatically adjusted on the
basis of the difference between the setpoint fixed on the
device and the detected temperature).
(1) Some temperature adjustment systems (e.g. floor-mounting ones) have a very high thermal inertia level, so
it takes considerable time to bring the room temperature into line with the required setpoint; in order to reduce
this inertia, another system with less inertia is often installed to help the main system to heat/cool the room
when the difference between the setpoint and the detected temperature is particularly marked. This system,
known as 2nd stage, helps to heat/cool the room during the initial phase, then it stops working when the
difference between the setpoint and the temperature can be managed in a faster way.

USER INSTRUCTIONS
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Thermostat operation statuses
The thermostat has two distinct operation statuses:
- Normal operation
- Parameter setting
When it is switched on, the thermostat goes into “normal operation” status. Using the
button key, you can switch from one status to the other (the switchover from
“parameter setting” status to “normal operation” status also comes about automatically,
30 seconds after the last pressure on the button keys).
Normal operation
In normal operation conditions, the pages containing information about the thermostat
are shown, along with the pages relating to any remote elements (e.g. NX temperature
adjustment probes) that may be present.
Choosing the page you want to see
To access the screen listing the pages that can be viewed
(relating to the thermostat, humidity and remote elements),
keep the button key pressed.
Use the or button key to scroll through the sequence
(if there are no remote elements - P01, P02, P03, P04 - and
no humidity section, the main thermostat page will be
displayed). To confirm a page, press the button key or
wait for the 30-second time-out period to elapse.
Pages relating to the thermostat (control type: HVAC)
Choosing the HVAC mode (pre-comfort, comfort,
economy or OFF)
If the visible page relates to the thermostat, and the control
type has been set by ETS in HVAC mode, press the button
key to select the required HVAC mode ( , ,
or ).
Each time the button key is pressed, the setpoint of the
selected HVAC mode is shown for a moment.
If the device is configured as a Slave, no local modification
of the HVAC mode is allowed; manual HVAC switch-off (OFF)
is permitted if this function is enabled via ETS.

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Forcing the setpoint manually
If the displayed page relates to the thermostat and any
HVAC mode other than OFF is active, press the or
button key to temporarily modify the setpoint of the active
HVAC mode (within the adjustment limits set via ETS), then
confirm with the button key or wait for the 5-second
time-out period to elapse. The use of forcing is indicated by
the flashing of the , , symbols. It remains active until
the active HVAC mode is modified
Pages relating to the thermostat (control type: setpoint)
Forcing the setpoint manually
If the visible page relates to the thermostat, and the control
type has been set by ETS in setpoint mode, press the or
button key to temporarily force the setpoint itself (within
the adjustment limits set via ETS).
The forcing remains active until the operating setpoint is
modified, or until the thermostat is manually switched off.
anual switch-off
If the visible page relates to the thermostat, and the control
type has been set by ETS in setpoint mode, press the
button key to switch the device off manually ( ).
Press the button key again to reactivate the device; when
the button key is pressed, the active setpoint will be shown
for a few moments. This operation is only possible if the
function is enabled via ETS.
Pages relating to the thermostat (control type: HVAC or setpoint)
Choosing the fan coil speed
If the displayed page relates to the thermostat, and the
control type is setpoint or any HVAC mode other than OFF,
press the or button key simultaneously to access
the selection page (the control algorithm of heating/cooling
operation must be set on “fan coil” from ETS).
Use the or button key to select the required fan coil
setting ( , , or ), then confirm with the button
key or wait for the 30-second time-out period to elapse.

USER INSTRUCTIONS
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Pages relating to the remote elements
Viewing the remote elements
If the visible page relates to a remote element, press the
button key to alternate the visualisation of the detected
temperature and the setpoint; if one of these two figures is
not available, nothing will happen when the button key is
pressed.
Pages rela ing o he humidi y sec ion
View he humidi y parame ers
If the page displayed relates to the humidity section, press
the or button key to view the relative humidity value
Hr, specific humidity HA and dew point temperature tr.
To return to the screen listing the pages that can be viewed, keep the button key
pressed.
Use the or button key to scroll through the sequence. To confirm a page, press the
button key or wait for the 30-second time-out period to elapse.

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Parameter setting
To set the operating parameters of the thermostat, humidity, and any remote elements
(e.g. NX temperature adjustment probes), press the button key.
To quit the parameter setting procedure without saving the modifications made on the
current page, just press the button key again or wait 30 seconds from the last pressure
on the button keys. The parameters that can be modified will depend on the page you
are viewing in normal operation status: if the visible page relates to the thermostat, the
Set menu concerning the thermostat will be shown; if the visible page is that of a general
remote element, the Set menu concerning the selected element will be shown; if the
visible page relates to the humidity section, the Set menu concerning the selected
humidity threshold will be shown.
The parameters relating to the thermostat and humidity are collected into three functional
groups: general parameters, operating parameters, and control parameters. Each group
can be enabled or disabled for visualisation and/or local modification, by setting the ETS
parameter “Local parameter modification” of the “General” menu.
General parameters
Setting the hour
When the hour figures are flashing, set the hour using the
button keys.
To confirm the set value and move on to the next parameter,
press the button key within 30 seconds.
Setting the minutes
When the minute figures are flashing, set the minutes using
the button keys.
To confirm the set value and move on to the next parameter,
press the button key within 30 seconds.
Setting G T / daylight-saving time
Use the or button key to choose either GMT or
daylight-saving time (OFF = GMT; ON = daylight-saving
time). This screen is only visible if the parameter has been
enabled from ETS. To confirm your choice and move on to
the next parameter, press the button key within 30
seconds.

USER INSTRUCTIONS
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Setting the temperature measurement unit
When the °C or °F temperature symbol begins flashing,
select the temperature measurement unit by means of the
button keys. To confirm your choice and move on to
the next parameter, press the button key within 30
seconds.
Returning to the main page
Use the or button key to set the main page that the
device must automatically visualise at the end of a period
of inactivity by the user (OFF = function disabled; THER =
main thermostat page; P01, P02, P03, P04 = pages relating
to the remote elements, if these are enabled; Hr = pages
relating to humidity, if enabled).
If this function is enabled, press the button key to access
the page for setting the duration of the inactivity period. Use
the or button key to set the gap (5 - 120 seconds). To
confirm your choice and move on to the next parameter,
press the button key within 30 seconds.
Back-lighting colour
Use the or button key to modify the colour of the
display back-lighting. To confirm your choice and move on
to the next parameter, press the button key within 30
seconds.
NB: if red/blue is chosen, the thermostat background will be
white during the idle phase (heating and cooling valves
deactivated) of normal operation, turning red when the
heating system is activated or blue when the cooling system
is activated.
Icons theme
Use the or button key to modify the colour themes for
representing the various icons shown on the display (MONO
= single-colour theme; TH1, TH2, TH3, TH4, TH5 = colour
themes) when the backlighting is active. The screen is only
visible if the back-lighting colour is white. To confirm your
choice and move on to the next parameter, press the
button key within 30 seconds.

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Single-colour theme for icon colour
Use the or button key to modify the colour of the icons
within a single-colour theme. This parameter is only visible
if the icon theme is single-colour and the back-lighting is
active. To confirm your choice and move on to the next
parameter, press the button key within 30 seconds.
Back-lighting timing
Use the or button key to set the minimum duration of
the inactivity time of the user before the back-lighting is
automatically deactivated (the gap can be set from 10 to
180 seconds). This parameter is only visible if the back-
lighting is active. To confirm your choice and move on to
the next parameter, press the button key within 30
seconds.
Back-lighting intensity
Use the or button key to choose how to manage the
back-lighting intensity (MAN = fixed value; SENS = light
sensitive sensor). This parameter is only visible if the back-
lighting is active. If the type of management is MAN, use
the or button key to choose the required percentage
of light intensity (the gap can be set from 30 to 100%).
If the type of management is SENS, use the or button
key to increase (+10%), decrease (-10%) or leave unaltered
(0%) the intensity value detected by the built-in light-
sensitive sensor.
To confirm your choice and move on to the next parameter,
press the button key within 30 seconds.
If the local modification function has been enabled from the ETS menu for the General
Parameters group only, press the button key to return to the start of the parameter
configuration menu. Otherwise, continue with the configuration of the next group of
parameters.

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USER INSTRUCTIONS
Operating parameters
White balancing
Use the button keys or to set the weight of the red
(RED), green (GRE) and blue (BLU) component in the
backlighting of the display (value can be set between 1 and
63). The regulation only applies to the white colour of the
screen. To confirm your choice and move on to the next
parameter, press the button key within 30 seconds.
Heating / cooling selection
Use the or button key to select the operating type
( = heating; = cooling; = auto). The auto
function is visible if the interdiction area(1) has been enabled
via the relative ETS parameter, or if the device is operating
as a Slave. To confirm your choice and move on to the next
parameter, press the button key within 30 seconds.
(1) The operating mode of the device (heating or cooling) can be managed manually or autonomously (by the
device itself). The manual method is via the local navigation menu or BUS commands that allow you to switch
from one type to another, modifying the specific parameter. The automatic mode is based on the principle of
an interdiction area - i.e. the temperature gap between the setpoints of the HVAC heating and cooling modes,
allowing the automatic switchover from one type of operation to the other.
The figure shows that as long as the detected temperature
is below the heating setpoint, the operating mode is
“heating”; if the detected value is higher than the cooling
setpoint, then the operating mode is “cooling”. If the
detected value is within the interdiction area, the operating
mode remains as before. The heating -> cooling switchover
point corresponds to the setpoint of the HVAC mode relating
to cooling; the cooling -> heating switchover point
corresponds to the setpoint of the HVAC mode relating to
heating.
Air-conditioning
Interdiction area
Heating

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USER INSTRUCTIONS
If the displayed page relates to the thermostat
(type of operation: heating)
Setpoint setting
When the symbol appears, the temperature value
begins flashing. Adjust the value of (Teconomy) / with
the aid of the button keys. To
confirm the set value, press the button key within 30
seconds.
Setpoint setting
When the symbol appears, the temperature value
begins flashing. Adjust the value of (TPRE-COMFORT)
with the aid of the button keys. To confirm the set
value, press the button key within 30 seconds.
Setpoint setting
When the symbol appears, the temperature value
begins flashing. Adjust the value of (TCOMFORT) with
the aid of the button keys.
To confirm the set value, press the button key within 30
seconds.
Setting the anti-freeze temperature value
When the symbol appears, the temperature value
begins flashing. Adjust the value of the anti-freeze
temperature using the button keys.
To confirm the set value, press the button key within 30
seconds.

If the displayed page relates to the thermostat
(type of operation: cooling)
Setpoint setting
When the symbol appears, the temperature value
begins flashing. Adjust the value of (TCOMFORT) with
the aid of the button keys. To confirm the set value,
press the button key within 30 seconds.
Setpoint setting
When the symbol appears, the temperature value
begins flashing. Adjust the value of (TPRE-COMFORT)
with the aid of the button keys. To confirm the set
value, press the button key within 30 seconds.
Setpoint setting
When the symbol appears, the temperature value
begins flashing. Adjust the value of (Teconomy) with
the aid of the button keys. To confirm the set value,
press the button key within 30 seconds.
Setting the high temperature protection value
When the symbol appears, the temperature value
begins flashing. Adjust the value of the high temperature
protection using the button keys.
To confirm the set value, press the button key within 30
seconds.
If the operating type is “auto”, the setpoint setting pages visualised are those relating to
the operating type active in that moment (heating or cooling).
ATTENTION!
The setpoint values are subject to the following limitations:
- HEATING
TANTIGELO (Tanti-freeze) ≤ ≤ ≤
- COOLING
≤ ≤ ≤ TPROTEZIONE ALTE TEMPERATURE
(Thigh temperature protection)
USER INSTRUCTIONS
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If he displayed page rela es o humidi y
Enabling he humidi y hresholds (from 1..5)
Use the button keys to enable (ON) or disable (OFF)
the relative humidity thresholds (up to 5, if enabled in ETS).
To confirm your choice and move on to the next parameter,
press the button key within 30 seconds.
Enabling he dew poin alarm hreshold
Use the button keys to enable (ON) or disable (OFF)
the dew point alarm threshold (if enabled in ETS).
To confirm your choice and move on to the next parameter,
press the button key within 30 seconds.
Humidi y hresholds (from 1..5)
Use the button keys to modify the value of the relative
humidity thresholds (up to 5, if enabled in ETS). The gap
that can be set varies from 1% to 100%. To confirm the set
value and move on to the next parameter, press the
button key within 30 seconds.
Signalling limi of he dew poin alarm
Use the button keys to modify the value associated
with the signalling limit of the dew point alarm threshold (if
enabled in ETS). The gap that can be set varies from 1% to
100%.
To confirm your choice and move on to the next parameter,
press the button key within 30 seconds.
If the local modification function has been enabled from the ETS menu for the General
Parameters and Operating Parameters groups only, press the button key to return to
the start of the parameter configuration menu. Otherwise, continue with the configuration
of the next group of parameters.
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USER INSTRUCTIONS
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Control parameters
The screens that can be visualised will depend on the type of control logic of the
temperature adjustment system that was set via ETS (with the “Heating control
algorithm” and the “Cooling control algorithm” parameters of the “Load control” menu):
• two points ON-OFF
• two points 0%-100%
• PWM proportional-integral
• continuous proportional-integral
• fan coil with ON-OFF speed control
• fan coil with continuous speed control
TWO POINTS ON-OFF
The operating principle manages the temperature adjustment system with two thresholds
(hysteresis cycle), used to distinguish the ON or OFF status of the system.
In heating mode, when the detected temperature is lower than the “setpoint - heat” value, the
device activates the heating system by sending the relative command to the actuator that manages
it; when the detected temperature reaches the fixed setpoint value, the device deactivates the
heating system.
HEATING
In cooling mode, when the measured temperature is higher than the “setpoint + cond” value,
the device activates the cooling system by sending the relative command to the actuator that
manages it; when the measured temperature reaches the fixed setpoint value, the device
deactivates the cooling system.
COOLING
To avoid continuous solenoid valve switchovers, after an OFF-ON-OFF sequence the next ON
command can only be sent after at least 2 minutes have elapsed.
T
T
setpoint
setpoint
heat
cond