ROOM
THERMOSTATS
KNX
BASIC DOCUMENTATION
Contents
2
2
2
2
ABOUT THIS DOCUMENT
Document use / request to the reader
Target audience, prerequisites
Glossary
3
3
3
4
SUMMARY
Types
Functions
Integration via KNX bus
5
5
6
13
17
19
22
35
36
40
42
42
45
51
FUNCTIONS
Temperature control
Operating modes
Room temperature setpoints
Applications overview
Additional functions
Control sequences
Control outputs
Fan control
Multifunctional input, digital input
Handling faults
KNX communications
Communication objects (S-mode)
Control parameters
59
59
60
62
63
HANDLING
Mounting and installation
Commissioning
Operation
Disposal
64 SUPPORTED KNX TOOLS
64 ETS Professional
65 CONNECTION
65 Connection terminals
65 Connection diagrams
66 MECHANICAL DESIGN
66 General
66 Dimensions
67 TECHNICAL DATA
69 INDEX
Contents
About this document
DOCUMENT USE /
REQUEST TO THE READER
GLOSSARY
The inputs, outputs and parameters of an application
can be influenced in various ways. These are identified
by the following symbols in this document:
Parameters identified by this symbol are set using
ETS Professional.
Before using our products, it is important that you read
the documents supplied with or ordered at the same
time as the products (equipment, applications, tools,
etc.) carefully and in full.
We assume that persons using our products and
documents are authorized and trained appropriately
and have the technical knowledge required to use our
products as intended.
NOTE!
Setting KNX parameters is only supported by the
following tool versions:
- ETS3f or higher
TARGET AUDIENCE, PREREQUISITES
This document assumes that users of the thermostats
are familiar with the ETS Professional and able to use
them.
It also presupposes that these users are aware of the
specific conditions associated with KNX.
In most countries, specific KNX know-how is conveyed
through training centers certified by the KNX
Association.
Inputs and outputs identified by this symbol
communicate with other KNX devices.
They are called communication objects (CO).
The communication objects of the thermostats work in
S-mode, These objects are described accordingly.
A list of the parameters is shown in page 51.
2
Summary
TYPES
Operating
voltage
AC 230 V
(1)
Control outputs
3-pos
1(1)
ON/OFF
2 (1)
DC 0..10 V
KNX switching groups
Housing color
White
Selectable: ON/OFF or 3-position
FUNCTIONS
Use
Features
Fan coil units via ON/OFF or modulating control outputs:
• 2-pipe system
• 2-pipe system with electric heater
• 4-pipe system
• Operating modes: Comfort, Economy (Energy
Saving) and Protection
• ON/OFF or 3-position control outputs (relay)
• Output for 3-speed or 1-speed fan
• Automatic or manual heating / cooling changeover
• Backlit display
• C 230 V operating voltage
Chilled / heated ceilings (or radiators) via ON/OFF or
modulating control outputs:
• Chilled / heated ceiling
• Chilled / heated ceiling with electric heater
• Chilled / heated ceiling and radiator / floor heating
Functions
• Room temperature control via built-in temperature
sensor or external room temperature / return air
temperature sensor
• Changeover between heating and cooling mode
(automatic via local sensor or bus, or manually)
• Selection of applications via DIP switches
• Select operating mode via operating mode button
on the thermostat
• Temporary Comfort mode extension
• 1- or 3-speed fan control (automatically or manually)
Compressors: Via ON/OFF control
• 1-stage compressors in DX type equipment
• 1-stage compressors in DX type equipment with
electric heater
The room thermostats are delivered with a fixed set of
applications.
The relevant application is selected and activated during
commissioning using one of the following tools:
• ETS Professional
• Local DIP switch and HMI
3
Contents
Summary (continued)
INTEGRATION VIA KNX BUS
• Display of current room temperature or setpoint in
°C and/or °F
• Minimum and maximum limitation of room
temperature setpoint
• Button lock (automatically or manually)
• 2 multifunctional inputs, freely selectable for:
-
Operating mode switchover contact (keycard,
window contact, etc.)
-
Sensor for automatic heating / cooling
changeover
- External room temperature or return air temperature
sensor
- Dew point sensor
- Electric heater enable
- Fault input
-
Monitor input for temperature sensor or switch
state
• Advanced fan control function, e.g. fan kick, fan
start, selectable fan operation (enable, disable or
depending on heating or cooling mode)
• "Purge" function together with 2-port valve in a
2-pipe changeover system
• Reminder to clean fan filters
• Floor heating temperature limitation
• Reload factory settings for commissioning and
control parameters
• Integration into third-party systems via group
addressing (ETS).
The following KNX functions are available:
• Central time program and setpoints
• Outside temperature or time of day via bus displayed
on thermostat
• Remote operation and monitoring,
• Maximum energy efficiency due to exchange of
relevant energy information,)
• Alarming, e.g. external fault contact, condensation,
clean filter, etc.
• Monitoring input for temperature sensor or switch
Engineering and commissioning can be done using…
- local DIP switches / HMI
- ETS Professional
4
Functions
TEMPERATURE CONTROL
Room temperature
The acquired room temperature (internal or
external sensor) is also available as information on the
bus.
• With automatic changeover or continuous heating
/ cooling, symbols
indicate that the system
currently heats or cools (heating or cooling output is
activated).
• With manual changeover (P01 = 2), symbols
indicate that the system currently operates in heating
or cooling mode. Thus, the symbols are displayed even
when the thermostat operates in the neutral zone.
Symbols
indicate that the system currently
heats or cools (heating or cooling output is activated).
General note:
Parameters
Setting of the control parameters (P01, etc., mentioned
throughout the document) is described in page 51.
Temperature control
The thermostat acquires the room temperature via
built-in sensor, external room temperature sensor , or
external return air temperature sensor , and maintains
the setpoint by delivering actuator control commands to
heating and/or cooling equipment. The following control
outputs are available:
• ON/OFF control (2-position)
• Modulating PI/P control with 3-position control
output (only for 2-pipe applications)
The switching differential or proportional band is 2 K for
heating mode and 1 K for cooling mode (adjustable via
parameters P30 and P31).
The integral action time for modulating PI control is 5
minutes (adjustable via parameter P35).
Concurrent display of °C and °F
Concurrent display of the current temperature or
setpoint in °C and °F (parameter P07 = 1) is possible on
the thermostats.
Outside temperature via bus
The outside temperature can be displayed on
the room thermostat by setting parameter P07 = 2. This
temperature value has only information character.
In S-mode, the corresponding communication object
needs to be bound with a KNX sensor device.
Display
The display shows the acquired room temperature or
the Comfort setpoint, selectable via parameter P06. The
factory setting displays the current room temperature.
Use parameter P04 to display the room temperature or
setpoint in °F rather than °C as needed.
5
Contents
Functions (continued)
Time of day via bus
Time of day via bus can be displayed on the room
thermostat by setting parameter P07 = 3 or 4. The
display format is either in 12- or in 24-hour format. The
information can be received from a KNX device if the
corresponding communication object is bound.
Economy
The setpoints (less heating and cooling than in
Comfort mode) can be defined via parameters P11
and P12.
The thermostat switches to Economy mode when...
- the operating mode button is pressed (only possible
if parameter P02 is set to 2)
- Economy is sent via bus
OPERATING MODES
The thermostat's operating mode can be influenced in
different ways (see below). Specific heating and cooling
setpoints are assigned to each operating mode.
Room operating mode:
Window state
- an operating mode switchover contact (e.g. keycard
contact presence detector, window contact) is active.
The contact can be connected to multifunctional input
X1, X2. Set parameter P38 / P40 to 3 (P02 is irrelevant)*
- "Window state" is sent via bus, e.g. from a KNX switch
or a KNX presence detector (P02 is irrelevant)*
Room operating mode: State
The thermostat sends the effective room operating
mode on the bus.
The following operating modes are available:
Auto Timer
In Auto Timer mode the room operating mode is
commanded via bus.
Auto Timer is replaced by Comfort when no time
schedule via bus is present.
NOTE:
( )
* Operating mode switchover: Only one input source
must be used, either local input X1/X2or KNX bus.
User operations are ineffective and "OFF" is displayed
if the operating mode switchover contact is active, or
if "Window state" is sent via bus.
Comfort
In Comfort mode, the thermostat maintains the
Comfort setpoint. This setpoint can be defined via
parameters P8, P9 and P10.
It can be locally adjusted via the +/- buttons or via
bus.
In Comfort mode, the fan can be set to automatic or
manual fan speed: Low, medium or high.
6
Functions (continued)
Protection
In Protection mode, the system is...
- protected against frost (factory setting 8 °C, can
be disabled or changed via P65)
- protected against overheating (factory setting OFF,
can be enabled or changed via P66)
No other operating mode can be selected locally if
Protection mode is commanded via bus
and
are displayed.
DIFFERENT WAYS TO INFLUENCE THE OPERATING MODE
Source for change of operating mode
The operating mode can be influenced by different interventions.
Source
Description
Value of DP "Cause"
Local operation
via operating mode
button
- Operating mode is not Auto Timer
- No time schedule via bus
- Temporary Comfort extension is active
- Operating mode switchover contact
"Window state" sent via bus
- Time schedule available via bus
local operating mode is set to Auto
Timer
- Time schedule sends Protection mode
via bus
operating mode cannot be changed
locally
Room operating mode selector
(preselection)
Bus command
Room op. mode
7
"Timer" function
Room operating mode contact
Room operating mode contact
Time switch
Contents
Functions (continued)
Priority of operating mode interventions
The following table shows the priorities of different interventions. A lower number means a higher priority.
Priority
Description
Remark
1
Commissioning
In parameter setting mode (highest priority), you can always
command an operating mode independent of all other settings
or intervention via bus and local input.
2
Protection mode via bus from time
schedule
Protection mode, sent by a time schedule, has priority 2.
It cannot be overridden by the user nor by an operating mode
switchover contact.
3
Operating mode switchover
contact
If the contact is closed, the operating mode changes to Economy.
This overrides the operating mode on the thermostat.
3
"Window state" via bus
"Window state" sent via bus has the same effect as the
operating mode switchover contact.
NOTE:
Only one input source must be used, either local input X1/X2
or KNX bus.
4
Operating mode button
The user can switch the operating mode using the operating
mode button.
4
Operating mode via bus
The operating mode can be changed via bus
4
Temporary extended Comfort
mode via operating mode button
The operating mode can be temporarily set from Economy to
Comfort by pressing the operating mode button, if...
- Economy was sent via bus
- extended Comfort period >0 (parameter P68)
The last intervention wins, either locally or via bus
4
Time schedule via bus
The operating mode sent via bus can be overridden by all other
interventions.
Exception: Protection mode has priority 2.
8
Functions (continued)
Auto Timer mode with time schedule via bus
If a time schedule via bus is present, e.g. from
central control unit, then the Auto Timer mode
is active. The thermostat automatically changes
between Comfort and Economy according to the
time schedule via bus.
Precomfort via bus
If the time schedule sends Precomfort mode, then this
mode will be transformed either into Economy (factory
setting) or Comfort (selectable via parameter P88).
Behavior when bus sends Protection
No intervention is possible neither by the user nor by an
operating mode switch-over contact, if Protection mode
is set by the time schedule. OFF flashes on the display
when the user presses a button.
The display shows the Auto Timer mode symbol
along with the symbol for the effective room operating
mode (Comfort
or Economy
).
By pressing the operating mode button, you can
change to another operating mode.
Automatic fan is the default fan speed in Auto Timer
mode.
Availability of Economy mode
The operating mode can be selected locally via the
operating mode button. The behavior of the operating
mode button (user profile) can be defined via parameter
P02, factory setting is P02 = 1.
Behavior when bus sends new operating mode
Each time the time schedule sends a new operating mode
(switching event), the operating mode of the thermostat
is set back to Auto Timer mode. This is to assure that
the room temperature is maintained according to the
time schedule.
P02
Without
time schedule
With
time schedule via bus
Description
1
- Switching manually between 2 modes, Economy is not
available (factory setting)
- Suited for hotel guest rooms or commercial buildings.
- If a time schedule via bus is available, then the Comfort
mode can be temporarily extended (see below)
2
- Switching manually between 3 modes
- Suited for homes and rooms where manual switching to
Economy mode is desired
9
Contents
Functions (continued)
Operating mode switchover contact (window
contact)
The thermostat can be forced into Economy mode (e.g.
when a window is opened, when a presence detector
signals "no one present", when the keycard of a hotel
room is withdrawn, etc). The contact can be connected
to multifunctional input X1, X2. Set parameter P38, P40
to 3.
Temporary timer to extend the Comfort mode
Comfort mode can be temporarily extended (e.g.
working after business hour or on weekends) when the
thermostat is in Economy mode. The operating mode
button switches the operating mode back to Comfort for
the period preset in P68.
Press the operating mode button again to stop the
timer.
The following conditions must be fulfilled:
• mode selection via operating mode button is set to
"Protection-Auto" (P02 = 1) and the time schedule
via bus is Economy.
• Parameter P68 (extend Comfort period) is greater
than 0.
During the temporary Comfort mode extension, symbol
appears.
If parameter P68 (extend Comfort period) = 0, extended
Comfort cannot be activated; pressing the operating
mode button will switch the thermostat to Protection.
If the operating mode switchover contact is active,
pressing the operating mode button will show "OFF"
(blinking).
oom operating mode:
R
Window state
The function is also available via the KNX signal "Window
state", e.g. from a KNX switch or a KNX presence
detector.
Note: Only one input source must be used, either local
input X1/X2or KNX bus.
User operations are ineffective and "OFF" is displayed
if the operating mode switchover contact is active, or if
"Window state" is sent via bus.
10
Functions (continued)
COMMUNICATION EXAMPLES
The following examples show two typical applications of
a central time schedule in conjunction with local control
of the room operating mode.
The room operating mode in rooms 1…2 of a building is
determined by the time schedule. Window contacts are
fitted in all rooms.
The following conditions are specified:
The rooms are used and controlled by the time
schedule as follows:
- Night setback from 17:00 to 08:00 (Economy)
- Protection from 20:00 to 06:00
- Lunch break from 12:00 to 13:00 (Precomfort)
Time schedule
The substitution (parameter P88) for Precomfort via
bus is set on the thermostats as follows:
- Room 1: Comfort (1)
- Room 2: Economy (0)
Example 1 : Operating mode switchover
In room 1, the window is opened briefly, once in the
morning, once in late afternoon and once at night (1).
Only the opening in the morning has a direct impact on
the effective room operating mode.
During lunch break, the time schedule changes to
Precomfort. The mode remains in Comfort as set by
parameter "Transformation Precomfort" (P88 = 1).
06:00 08:00
Comfort
12:00 13:00
17:00
20:00
Precomfort
Economy
Protection
Window contact
Room 1
Window open
(1)
(1)
Window closed
(2)
Comfort
Effective room operating
mode Room 1
Economy
Protection
11
(1)
Contents
Functions (continued)
Example 2 : Interaction of user operation (operating
mode button) and central time
schedule
In room 2, the window is opened briefly, once in the
morning and once at night (1). Only the opening in
the morning has a direct impact on the effective room
operating mode.
With the operating mode button, the operating mode
can be changed between OFF and Auto or temporary
Comfort extension respectively.
• During lunch break, the time schedule changes to
Precomfort. The mode of the thermostat changes
to Economy as set by parameter "Transformation
Precomfort" (P88 = 0) (6)
Time schedule
• During lunch break, the user changes the operating
mode to Comfort (temporary Comfort extension) by
pressing the operating mode button (2). At 13:00, the
timer is reset due to mode change of the central time
schedule
• In the afternoon, the user switches the thermostat off
by pressing the operating mode button (3). At 17:00
the user setting is reset to Economy by the time
schedule
• At 19:30, the user again extends the Comfort mode (4).
At 20:00, the timer is reset by the time schedule
• After 20:00, pressing the operating mode button has
no effect, as the central time switch sets the thermostat
to Protection (5).
06:00 08:00
Comfort
12:00 13:00
17:00
20:00
Precomfort
Economy
Protection
Operating mode button
on the thermostat
Window contact
Room 1
(2)
Pressed
Window open
(1)
Comfort
Effective room operating
mode Room 1
(6)
Protection
12
(4)
(1)
Window closed
Economy
(3)
(5)
Functions (continued)
ROOM TEMPERATURE SETPOINTS
P09 < P10
• If the minimum limit P09 is set lower than the
maximum limit P10, both heating and cooling are
adjustable between these 2 limits
• The customer adjusts the desired setpoint and
the thermostat controls the room temperature
accordingly.
• For 4-pipe applications, the selected comfort
setpoint is in the middle of the dead zone (P33).
The unit stops to energize the heating / cooling
outputs as soon as the room temperature reaches
the dead zone.
DESCRIPTION
Comfort mode
The factory setting for the Comfort basic setpoint
is 21 °C and can be changed in the thermostat’s
EEPROM via parameter P08 or via bus with
communication object "Comfort basic setpoint". The
last intervention always wins.
The Comfort setpoint can be adjusted via the
+/- buttons, or via bus from a remote device like a
touchpanel, operating unit, etc. The last intervention
always wins.
Example
Temporary setpoint
If the "Temporary setpoint" function is enabled via
parameter P69, the Comfort setpoint adjusted via
the +/- buttons or via bus is set back to the Comfort
basic setpoint stored in P08 when the operating mode
changes.
5°C
18°C
25°C
P09
P10
40°C
Cooling setpoint adjustable 18…25 °C
Heating setpoint adjustable 18…25 °C
Setpoint limitation
For energy saving purposes, the setpoint setting range
can be limited to minimum (P09) and maximum (P10).
13
Contents
Functions (continued)
P09  P10
• If the minimum limit P09 is set higher than the limit
P10, then
-
The setting range of cooling setpoint is from
P09…40 °C in place of 5…40 °C
- The setting range of heating setpoint is from 5…
P10 °C in place of 5…40 °C.
This allows the user to limit the maximum heating
setpoint and the minimum cooling setpoint. This
concept helps to save energy costs.
• For 4-pipe applications
- The thermostat runs with the setpoint of the active
sequence:
In heating mode, the heating setpoint is active and
adjustable via "+" / "-" buttons. In cooling mode,
the cooling setpoint is active and adjustable via "+"
/ "-" buttons.
- Switching from the heating setpoint to the cooling
setpoint and vice-versa occurs when the room
temperature reaches the adjusted limitation
(P09 or P10) of the inactive sequence. E.g. the
thermostat is in heating sequence and runs with
the heating setpoint. When the room temperature
reaches P09, the thermostat switches to cooling
mode and runs with the cooling setpoint, as long
as the room temperature does not drop below
P10.
Economy mode
Use control parameters P11 and P12 to adjust the
Economy mode setpoints.
The heating setpoint is factory-set to 15 °C, and the
cooling setpoint to 30 °C.
Protection mode
Use control parameters P65 and P66 to adjust the
Protection mode setpoints.
The heating setpoint is factory-set to 8 °C (frost
protection) and to OFF for cooling.
CAUTION:
If a setpoint (Economy or Protection) is set to OFF,
the thermostat does not control the room temperature
in the corresponding mode (heating or cooling).
This means no protective heating or cooling function
and thus risk of frost in heating mode or risk of
overtemperature in cooling mode!
The Economy setpoints are accessible at the service
level (P11, P12); the Protection setpoints at the
expert level (P65, P66).
Example
5°C
21°C
25°C
P10
P09
40°C
Cooling setpoint adjustable 25…40 °C
Heating setpoint adjustable 5…21 °C
14
Functions (continued)
SETTING AND ADJUSTING SETPOINTS
Current runtime setpoints in thermostat
Comfort setpoint
Economy Heating
Economy Cooling
Protection Heating
Protection Cooling
Room temperature setpoints can be:
- set during commissioning
- adjusted during runtime
Comfort basic setpoint
Comfort setpoint
The source can be: - the local HMI
- a tool
- a central control unit
The thermostat stores the setpoints
- in EEPROM in the form of parameters
- in the runtime memory
Input S-mode (3)
Comfort setpoint
Comfort setpoint
Economy Heating
Economy Cooling
Protection Heating
Protection Cooling
Setpoint setting
- HMI
+ / - buttons
New current runtime setpoints in thermostat
The table below shows the interrelations:
Commissioning
Setpoint adjustment
Local operation
Input
S-mode
- Tool download
Comfort basic setpoint
Dead zone Comfort (1)
Setpoint Economy Heating
Setpoint Economy Cooling
Comfort
basic
setpoint
Effective room
operating mode
Current setpoint
(used by the thermostat for
temperature control)
Setpoint Protection Heating
Setpoint Protection Cooling
Stored in EEPROM of thermostat
P08 Comfort basic setpoint
P33 Dead zone Comfort (1)
P11 Economy Heating
P12 Economy Cooling
P65 Protection Heating
P66 Protection Cooling
nly required for heating AND cooling applications
O
(see page 33)
(3)
S-Mode: the last intervention wins, either S-Mode
input or local operation
(1)
15
Contents
Functions (continued)
Current setpoint
The current setpoint (used by the thermostat for
temperature control) is available on the bus for use in
the central control unit.
•4
-pipewith P09<P10
The comfort setpoint w (value selectable via e.g.
+/_ buttons) is in the middle of the dead zone (P33).
The current setpoints w2.. (used by the thermostat
for temperature control) are at the boundaries of
the dead zone.
w2h = Comfort setpoint (w) – ½ dead zone (Xdz)
w2c = Comfort setpoint (w) + ½ dead zone (Xdz)
Clarification concerning current setpoint in Comfort
mode
The comfort setpoint w (e.g. customer setting on
the display) and the current setpoint w2 (used by the
thermostat for temperature control, but not visible on
the unit) is handled differently depending of the selected
application and setting:
• 2-pipe or 4-pipe with P09>P10
The comfort setpoint w and current setpoint w2
have the same value.
100
Heating mode
Cooling mode
Y[%]
Y[%]
Y1
XpH
w
T[°C]
0
w
XpC
Y2
1/2 Xdz 1/2 Xdz
100
0
w
XpH
w2h
XpC
T[°C]
w2c
General notes:
• Changes via the local HMI or via tool have the same
priority (last always wins).
• Setting the Comfort basic setpoint will reset the
runtime Comfort setpoint to the basic setpoint.
Y1
100
0
Y[%] Y1
T[°C]
16
Functions (continued)
APPLICATIONS OVERVIEW
The tool offers the applications printed in bold text (basic
applications).
For universal applications (chilled ceiling, etc.), refer to
page 32.
For compressor applications, refer to page 32.
The thermostats support the following applications,
which can be configured using the DIP switches inside
the front panel of the unit or a commissioning tool.
All DIP switches need to be set to OFF (remote
configuration, factory setting) to select an application
via commissioning tool.
Application and output signal
DIP switches
Remote configuration
via commissioning tool (factory setting)
• ETS Professional
Heating or cooling
•2
-pipe fan coil unit
(heating or cooling)
• Chilled / heated ceiling
(heating or cooling)
• 1-stage compressor
(heating or cooling)
• 2-pipe fan coil unit
(heating or cooling)
• Chilled / heated ceiling
(heating or cooling)
Diagram
ON
1
ON/OFF
ON/OFF
2
3
2
3
ON
1
B2
T
T
(B1)
ON/OFF
3-position
Y1
M1
ON
T
3-position
17
(B1)
1
2
3
Contents
Functions (continued)
Application and output signal
Heating or cooling with electric heater
•2
-pipe fan coil unit with electric heater
(heating or cooling)
• Chilled / heated ceiling with electric heater,
(heating or cooling)
• 1-stage compressor with electric heater,
(heating or cooling)
DIP switches
Diagram
ON
ON/OFF
YE
B2
ON/OFF
1
2
3
T
+
T
(B1)
Y1
ON/OFF
M1
T
(B1)
(B1)
Heating and cooling
•4
-pipe fan coil unit
(heating and cooling)
• Chilled ceiling and radiator,
(heating and cooling)
• 1-stage compressor,
(heating and cooling)
ON
ON/OFF
ON/OFF
1
2
3
Y2
T
(B1)
ON/OFF
Y1
M1
T
(B1)
(B1)
Key
Y1 Heating or heating / cooling valve actuator
Y2 Cooling valve actuator
E1 Electric heater
M1 3- or 1-speed fan
B1 Return air temperature sensor or external room
temperature sensor (optional))
B2 Changeover sensor (optional)
18
Functions (continued)
ADDITIONAL FUNCTIONS
M
Heating / cooling changeover via bus
The heating / cooling changeover information can
be received via bus. This is only possible if the
control sequence is set to automatic heating / cooling
changeover (parameter P01 = 3) and no local input X1,
X2 is assigned with this function.
M Operating mode
Tw Water temperature
Cooling mode
P36
Heating mode
P37 Tw[°C]
Changeover switch
The QAH11.1 cable temperature sensor for automatic
heating / cooling changeover can be replaced by an
external switch for manual, remote changeover:
Heating/cooling changeover
In the absence of the required information (e.g. due to
problems with data communication, power failure, etc.),
the thermostat operates in the last valid room operating
mode (heating or cooling).
X2
M
Automatic heating / cooling changeover via
changeover sensor
If a cable temperature sensor (QAH11.1 + ARG86.3)
is connected to X1 / X2, and parameter P38 / P40 is
=2, the water temperature acquired by the changeover
sensor is used to change over from heating to cooling
mode, or vice versa. When the water temperature is
above 28 °C (parameter P37), the thermostat changes
over to heating mode, and to cooling mode when below
16 °C (parameter P36).
If the water temperature is between the 2 changeover
points immediately after power-up, the thermostat starts
in heating mode.
The water temperature is acquired at 30-second intervals
and the operating state is updated accordingly.
T
X2
QAH11.1 M
T°C
Contact open
Contact closed
heating mode
cooling mode
The sensor or switch can be connected to input terminal
X2 or X1, depending on the commissioning of the inputs
(P38, P40).
See also page 40 "Multifunctional input".
19
Contents
Functions (continued)
Manual heating / cooling changeover
If manual heating / cooling changeover is commissioned
(P01 = 2), then heating / cooling mode cannot be changed
via bus / changover sensor / switch; it will remain in the
last mode as selected locally via button.
Avoid damage from moisture
In very warm and humid climates, the fan can be run
periodically or continuously at a low fan speed (e.g.
in empty apartments or shops) in Economy mode by
setting parameter P61, in order to avoid damage from
moisture due to lack of air circulation. See also page 36
"Fan control", under "Fan kick function".
External / return air temperature sensor
The thermostat acquires the room temperature via builtin sensor, external room temperature sensor (QAA32),
or external return air temperature sensor (QAH11.1)
connected to multifunctional input X1 or X2.
Inputs X1 or X2 must be commissioned accordingly. See
page 40 "Multifunctional input".
Minimum output ON-time / OFF-time
Limit the ON/OFF switching cycle to protect the HVAC
equipment, e.g. compressor and reduce wear and tear.
The minimum output on-time and off-time for 2-position
control output can be adjusted from 1 to 20 minutes
via parameters P48 and P49. The factory setting is 1
minute.
Readjusting the setpoint or heating / cooling mode
changeover immediately results in calculation of the
output state; the outputs may not hold the minimum
1-minute ON/OFF time.
If parameter P48 or P49 is set to above 1 minute,
the minimum ON/OFF time for the control output is
maintained as set, even if the setpoint or changeover
mode is readjusted.
Purge function
The changeover sensor ensures changeover from
heating to cooling mode based on the acquired water
temperature. We recommend activating the "Purge"
function (parameter P50) with 2-port valves. This function
ensures correct acquisition of the medium temperature
even if the 2-port valve is closed for an extended period
of time. The valve is then opened for 1 to 5 minutes
(adjustable) at 2-hour intervals during off hours.
Floor heating / Floor cooling
All heating sequences can also be used for floor
heating.
You can use fan coil unit heating / cooling sequences for
floor heating or cooling by disabling the fan via parameter
P52.
CAUTION:
The "Purge" function (parameter P50) must be
disabled if the thermostat is used in compressorbased applications.
20
Functions (continued)
Floor temperature limitation function
The floor temperature should be limited for 2 reasons:
Comfort and protection of the floor.
The floor temperature sensor, connected to multifunctional
input X1 or X2, acquires the floor temperature.
If the temperature exceeds the parameterized limit
(parameter P51), the heating valve is fully closed until
the floor temperature drops to a level 2 K below the
parameterized limit.
This function is factory-set to OFF (disabled).
Parameter P51
External temp.
sensor available
OFF
OFF
10...50 °C
10...50 °C
No
Yes
No
Yes
Input X1 or X2 must be commissioned accordingly (P38
or P40 = 1).
See page 40 "Multifunctional input".
Recommended values for P51:
• Living rooms: U
p to 26 °C for long-time presence,
up to 28 °C for short-time presence.
• Bath rooms: Up to 28 °C for long-time presence, up
to 30 °C for short-time presence.
The table below shows the relation between parameter,
temperature source and temperature display:
Source for display
of room temperature
Built-in sensor
External temp. sensor
Built-in sensor
Built-in sensor
Output control
according to
Floor temp. limit
function
Built-in sensor
External temp. sensor
Built-in sensor
Built-in sensor +
limit by external sensor
Not active
Not active
Not active
Active
The "Floor temperature limitation" function influences the outputs listed in the table below:
"Floor temp. limit" function has impact on output
Application
Output Y11
Output Y21
2-pipe
2-pipe &
el heater
4-pipe
H/C valve
H/C valve
El heater
Heating
valve
Cooling
valve
* If P13 = ON
( )
Heating
(P01 = 0/2/3)
Y11
Y21
Cooling
(P01 = 1/2/3)
N/A
Y21 (*)
Y11
Heat. and cool.
(P01 = 4)
Only
el heater
Y11
electric heater in cooling mode
NOTE:
Either floor temperature sensor or external room temperature sensor can be used.
21
Remark
Contents
Functions (continued)
CONTROL SEQUENCES
Dew point monitoring
Dew point monitoring is essential to prevent condensation
on the chilled ceiling (cooling with fan disabled, parameter
P52). It helps avoid associated damage to the building.
A dew point sensor with a potential-free contact is
connected to multifunctional input X1 or X2. If there is
condensation, the cooling valve is fully closed until no
more condensation is detected, and the cooling output
is disabled temporarily.
SEQUENCES OVERVIEW
(SETTING VIA PARAMETER P01)
The main control sequence (i.e. the water coil sequence
of the fan coil unit) can be set via parameter P01.
The following sequences can be activated in the
thermostats (each without or with auxiliary heating).
The available sequences depend on the application
(selected via DIP switch, see page 17).
État de défaut / Informations de défaut
The condensation symbol
is displayed during
temporary override and the fault "Condensation in room"
will be sent via bus.
The input must be commissioned accordingly (P38,
P40). See page 40 "Multifunctional input".
Button lock
If the "Button lock" function is enabled by parameter
P14, the buttons will be locked or unlocked by pressing
the right button for 3 seconds.
If "Auto lock" is configured, the thermostat will
automatically lock the buttons 10 seconds after the last
adjustment.
22
Functions (continued)
T
Parameter
P01 = 0
P01 = 1
P01 = 2
P01 = 3
P01 = 4
T
Sequence
T°C
Available
for basic
application (1):
Heating
T°C
Cooling
= heating
sequence for
el. heater /
radiator
T
2-pipe,
2-pipe & el heater
4 arrivées
T°C
Manually
select heating
or cooling
sequence
(using the
button on the
thermostat)
T
T°C
Automatic
heating / cooling
changeover via
external water
temperature
sensor or remote
switch
T°C
Heating
and cooling
sequence,
i.e. 4-pipe
T
-
-
(2)
(2)
NOTES:
(1)
For chilled / heated ceiling and radiator applications, see page 32; for compressor applications, see page 32.
(2)
For manual and automatic changeover with 4-pipe applications, see page 30:
- 4-pipe manual changeover (P01 = 2) means activating either cooling or heating outputs
- 4-pipe automatic changeover (P01 = 3) means swapping the control outputs according to a heating / cooling
sensor or remote switch ("main and secondary" application), see page 30.
For the relation between setpoints and sequences, see page 33.
23
Contents
Functions (continued)
APPLICATION MODE
Application mode
The behavior of the thermostat can be influenced by a building automation and control system (BACS) via bus with
the command "Application mode".
With this signal, cooling and/or heating activity can be enabled or disabled.
The thermostats support the following commands:
# Application mode
0 Auto
Description
Thermostat automatically changes between heating
and cooling
Control sequence enabled
Heating and/or cooling
1 Heat
Thermostat is only allowed to heat
Heating only
2 Morning warm-up
If "Morning warm-up" is received, the room should
be heated up as fast as possible (if necessary).
The thermostat will only allow heating
Thermostat is only allowed to provide cooling
Not supported by fan coil applications
If "Pre-cool" is received, the room should be cooled
down as fast as possible (if necessary). The
thermostat will only allow cooling
Thermostat is not controlling the outputs, which
means all outputs go to off or 0%
The thermostat should heat as much as possible.
The thermostat will only allow heating
All control outputs are set to 0% and only the fan is
set to high speed.
Function will be terminated by any operation on the
thermostat.
Heating only
3 Cool
4 Night purge
5 Pre-cool
6 Off
8 Emergency heat
9 Fan only
Cooling only
N/A (= Auto)
Cooling only
Neither heating nor cooling
Heating only
Run fan in high speed
With all other commands, the thermostat behaves like in Auto mode, i.e. heating or cooling according to demand.
24
Functions (continued)
Heating OR cooling
With a 2 pipe application, the control sequence state is determined by the application mode (see page 24) and by
the state of the heating / cooling changeover signal (via local sensor or bus), or fixed according to the selected
control sequence (P01 = heating (0) / cooling (1)).
Application mode
(via bus)
Auto (0)
Heat (1), (2), (8)
Cool (3), (5)
Night purge (4),
Fan only (9)
State changeover / continuous heating
or cooling
Control sequence
on thermostat
Heating
Heating
Cooling
Cooling
Heating
Heating
Cooling
Cooling
Heating
Heating
Cooling
Cooling
Heating
Heating
Cooling
Cooling
25
Contents
Functions (continued)
Heating AND cooling
With a 4-pipe, 2-pipe with electric heater, and 2-pipe with radiator application, the control sequence state depends
on the application mode and on the heating / cooling demand.
Application Mode
(via bus)
Auto (0)
Heat (1), (2), (8)
Cool (3), (5)
Night purge (4),
Fan only (9)
Heating / cooling demand
Control sequence
on thermostat
Heating
Heating
No demand
Heating / cooling depending
on last active sequence
Cooling
Cooling
Heating
Heating
No demand
Heating
Cooling
Heating
Heating
Cooling
No demand
Cooling
Cooling
Cooling
No temperature control active
Heating / cooling depending
on last active sequence
The value of the output as a function of the room
temperature is shown in the following diagram in case
of a heating and cooling system:
Wheat = current heating
setpoint
1 = Heat
Wcool = current cooling
setpoint
0 = Cool
100%
0
Wheat Wcool
26
TR
Functions (continued)
2-PIPE FAN COIL UNIT
Modulating control: 3-position
• Control sequence modulating output
The diagrams below show the control sequence for
modulating PI control.
On 2-pipe applications, the thermostat controls a valve
in heating / cooling mode with changeover (automatically
or manually), heating only, or cooling only. Cooling only
is factory-set (P01 = 1).
Heating mode
Y[%]
ON/OFF control
100
• Control sequence ON/OFF output
The diagrams below show the control sequence for
2-position control.
0
Heating mode
Y
1
0
1/2 SDH
Cooling mode
Y
Y1
W
T[°C]
1/2 SDH
W
0
1/2 SDC
Y1
XpH
Y1
100
W
T[°C]
0
W
T[°C]
XpC
T[°C] R
oom temperature
W Room temperature setpoint
Y1 Control command "Valve" or "Compressor"
XpH Proportional band "Heating" (P30)
XpC Proportional band "Cooling" (P31)
Y1
1
Cooling mode
Y[%]
T[°C]
1/2 SDC
T[°C] R
oom temperature
W Room temperature setpoint
Y1 Control command "Valve" or "Compressor"
SDH Switching differential "Heating" (P30)
SDC S
witching differential "Cooling" (P31)
NOTE:
The diagrams only show the PI thermostat’s
proportional part.
Setting the sequence and the control outputs
Refer to page 17 "Applications", page 22 "Sequences",
and page 35 "Outputs".
27
Contents
Functions (continued)
2-PIPE FAN COIL UNIT WITH ELECTRIC HEATER
Electric heating in heating mode
In heating mode, the valve receives an OPEN command
if the acquired temperature is below the setpoint. The
electric heater is used as an additional heating source
when the heating energy controlled by the valve is
insufficient.
The electric heater receives an ON command, if
the temperature is below "setpoint" minus "setpoint
differential" (= setpoint for electric heater).
Heating or cooling with auxiliary heater
On 2-pipe applications with electric heater, the
thermostat controls a valve in heating / cooling mode
with changeover, heating only, or cooling only plus an
auxiliary electric heater.
Cooling only is factory-set (P01 = 1) with enabled electric
heater (P13).
Electric heating, active in cooling mode
In cooling mode, the valve receives an OPEN command
if the acquired temperature is above the setpoint.
The electric heater receives an ON command if the
acquired room temperature drops below "setpoint"
minus "dead zone" (= setpoint for electric heater) while
the electric heater is enabled (parameter P13 = ON).
Electric heating and manual changeover
The electric heater is active in heating mode only and
the control output for the valve is permanently disabled
when manual changeover is selected (P01 = 2).
Digital input "Enable electric heater"
Remote enabling / disabling of the electric heater is
possible via input X1 or X2 for tariff regulations, energy
savings, etc.
Input X1 or X2 must be commissioned accordingly
(parameters P38, P40). See page 40 "Multifunctional
input".
NOTE:
"Setpoint for electric heater" is limited by parameter
"Maximum setpoint for Comfort mode" (P10).
28
Functions (continued)
Enable electric heater
The electric heater can also be enabled / disabled via
bus.
Cooling mode
(man. / auto. changeover = cooling or cooling only)
Y
NOTE:
If "Enable electric heater" input is used via bus, then
the function must not be assigned to a local input X1
or X2.
YE
Y1
XDZ
1
W
0
1/2 SDH
CAUTION:
An electric heater must always be protected by a
safety limit thermostat!
1/2 SDH
1/2 SDC
T[°C]
1/2 SDC
Heating mode with manual changeover (P01 = 2)
(manual changeover = heating)
Y
ON/OFF control
• Control sequence - ON/OFF output
The diagrams below show the control sequence for
2-position.
YE
1
W
0
Heating mode
1/2 SDH
T[°C]
1/2 SDH
(automatic changeover = heating or heating only)
Y
YE
Y1
WD
T[°C] R
oom temperature
W Room temperature setpoint
Y1 Control command "Valve" or "Compressor"
YE Control command "Electric heater"
SDH Switching differential "Heating" (P30)
SDC S
witching differential "Cooling" (P31)
XDZ Dead zone (P33)
WD Setpoint differential (P34)
1
W
0
1/2 SDH
1/2 SDH
1/2 SDH
T[°C]
1/2 SDH
NOTE:
The diagrams only show the PI thermostat’s
proportional part.
29
Contents
Functions (continued)
Setting the sequence and the control outputs
Refer to page 17 "Applications", page 22 "Sequences",
and page 35 "Outputs".
• Winter: Large coil (V1) for heating,
small coil (V2) for cooling
• Summer: Large coil (V1) for cooling,
small coil (V2) for heating
+
4-PIPE FAN COIL UNIT
T B2
V2
+
+
Heating and cooling
On 4-pipe applications, the thermostat controls 2 valves
in heating and cooling mode, heating / cooling mode
by manual selection, or heating and cooling mode with
changeover. Heating and cooling mode (P01 = 4) is
factory-set.
T B2
V1
V2
+
M1
V1
T
(B1)
M1
(B1)
T
(B1)
4-pipe application with manual changeover
The heating or cooling output can be released via
operating mode button if parameter P01 is set to Manual
(P01 = 2).
(B1)
Y
1
"Main and secondary" application
(4-pipe with changeover)
If parameter P01 is set to changeover (P01 = 3), the
heating and cooling output is swapped according to the
input state of the changeover sensor / switch / bus input
(see automatic heating and cooling changeover sensor
in page 19). This mode is used for the so-called "Main
and secondary" application. This is a 4-pipe fan coil unit
system with different capacities of the 2 coils. The water
circuit is changed to optimize the energy exchange
depending on the season (summer / winter):
Changeover
YC
YH
W
0
T[°C]
WDZ
YH
V1
Changeover
YC
V2
NOTE:
This example shows ON/OFF control; for modulating
control, connect the appropriate output terminals.
30
Functions (continued)
T[°C] R
oom temperature
W Room temperature setpoint
Y1 Control command "Valve" or "Comp." (H)
Y2 Control command "Valve" or "Comp." (C)
SDH Switching differential "Heating" (P30)
SDC S
witching differential "Cooling" (P31)
XDZ Dead zone (P33)
NOTES:
•T
he parameter for the heating and cooling changeover
sensor (B2 in the above diagram) must be set to 2 (X1
or X2, P38 or P40)
•T
he thermostat assumes winter operation when
B2 > P37 (factory setting 28 °C)
•T
he thermostat assumes summer operation when
B2 < P36 (factory setting 16 °C)
NOTE:
The diagrams only show the PI thermostat’s
proportional part.
ON/OFF control
The diagrams below show the control sequence for
2-position control.
Heating mode
with manual
selection
(P01 = 2)
Cooling mode
with manual
selection
(P01 = 2)
Y
Y
Y1
1
1/2 SDH
Y2v
1
W
0
Setting the sequence and the control outputs
Refer to page 17 "Applications", page 22 "Sequences",
and page 35 "Outputs".
T[°C]
1/2 SDH
W
0
1/2 SDC
T[°C]
1/2 SDC
Heating and cooling mode (P01 = 04)
Y
Y1
1/2 XDZ
1/2 XDZ
Y2
1
W
0
1/2 SDH
1/2 SDH
1/2 SDC
T[°C]
1/2 SDC
31
Contents
Functions (continued)
CHILLED / HEATED CEILING AND RADIATOR
APPLICATIONS
COMPRESSOR APPLICATIONS
For compressor applications,
• set the corresponding basic application
• disable the fan (P52) or set the fan speed (P53)
The following applications are available:
For chilled / heated ceiling and radiator,
• set the corresponding basic application
• disable the fan (P52)
The following applications are available:
Application for
chilled / heated
ceiling, radiator
Chilled / heated
ceiling with
changeover
Chilled / heated
ceiling
& el heater
(cooling only:
disable el heater
via P13)
Chilled ceiling
and radiator
Set basic
application
See
page
2-pipe
27
H
C
2-pipe and
electric
heater
28
El H + H ( \ \)
El H + C ( \ /)
C(/)
4-pipe
30
Application for
compressor
1-stage
compressor
for heating or
cooling
1-stage
compressor and
electric heater
(for cooling only:
disable electric
heater via P13)
1-stage
compressor
for heating and
cooling
Sequences
H + C ( \ /)
Set basic
application
2-pipe
See
page
27
Sequences
2-pipe and
electric
heater
28
El H + H ( \ \)
El H + C ( \ /)
C(/)
4-pipe
30
H + C ( \ /)
H
C
NOTES:
• Minimum ON/OFF time: P48 / P49
• Fan operation: P52 (0 = disabled, 1 = enabled)
• Fan speed: P53 (1 = 1-speed, 2 = 3-speed)
32
Functions (continued)
SETPOINTS AND SEQUENCES
The setpoints for Economy and Protection mode are
below the Comfort setpoints (heating) and above the
Comfort setpoints (cooling).
They can be set via parameters P11, P12 (Economy
mode) and P65, P66 (Protection mode)
2-pipe applications
On changeover applications, the Comfort setpoints for
heating and cooling sequence are the same (w).
On 2-pipe applications with electric heater, the Comfort
setpoint is either at the first heating sequence (in heating
mode) or at the cooling sequence (in cooling mode).
T[°C]
WHeatProt
WHeatEco
Application
Y
Comfort mode
Heating
Cooling
Y
2-pipe
T
Y
2-pipe and
electric heater
Y
Y
YE(1)
T
T
WHeatEco/Prot
Y
W
T
W
YE (2)
WCoolEco
Economy / Protection mode
Heating
Cooling
Y
T
W
WCoolProt
W
WCoolEco/
Prot
Y
YE (2)
YE(1)
T
T
WHeatEco/Prot
W
T
WHeatEco/
Prot
WCoolEco/
Prot
WHeatEco/Prot s etpoint heating in Economy or
Protection mode
WCoolEco/Prot setpoint cooling in Economy or
Protection mode
YR radiator sequence
YE electric heater sequence
If P13 = ON
In case of manual changeover (P01 = 2), the first
heating sequence is disabled to prevent heating
(electric heater) and cooling (coil) at he same time.
W setpoint in Comfort mode
(1)
(2)
33
Contents
Functions (continued)
4-pipe applications
On 4-pipe applications, the Comfort setpoint (w) is in
the middle of the dead zone, between the heating and
cooling sequence.
The dead zone can be adjusted via parameter P33.
Application
Comfort mode
Heating only (1)
Heating and
cooling
Y
Y
4-pipe
Cooling only
Economy / Protection mode
Heating and/or cooling
(1)
Y
T
W
If manual changeover is selected, then either the cooling
sequence or the heating sequence is released. In this
case, the Comfort setpoint is at the selected heating or
cooling sequence.
Y
T
T
W
WHeatEco/Prot
Manual changeover, P01 = 2
W setpoint in Comfort mode
WHeatEco/Prot setpoint heating in Economy or
Protection mode
T
WHeatEco/
Prot
WCoolEco/
Prot
WCoolEco/Prot s etpoint cooling in Economy or
Protection mode
YE electric heater sequence
(1)
34
Functions (continued)
CONTROL OUTPUTS
Electric heater control signal (2-position)
The electric heater receives an ON command via the
auxiliary heating control output (Y…, see Mounting
Instructions) when…
1. the acquired room temperature is below the
"Setpoint for electric heater"
2. the electric heater has been switched off for at
least 1 minute
The OFF command for the electric heater is output
when…
1. the acquired room temperature is above the
setpoint (electric heater)
2. the electric heater has been switched on for at
least 1 minute
OVERVIEW
Overview of control outputs
Different control output signals are available. They need
to be defined during commissioning (see below).
2-position 2-position PWM 3-position DC 0…10 V
Y11, Y21
Y11, Y21
—
—
( )
(2 x SPST)
* (1 x / )
* Only on 2-pipe application
( )
ON/OFF control signal (2-position)
The valve or compressor receives the OPEN/ON
command via control output Y11 or Y21 when…
1. the acquired room temperature is below the
setpoint (heating mode) or above the setpoint
(cooling mode).
2. the control outputs have been inactive for more
than the "Minimum output OFF-time" (factory
setting 1 minute, adjustable via parameter P48).
OFF command when…
1. the acquired room temperature is above the
setpoint (heating mode) or below the setpoint
(cooling mode).
2. the valve has been active for more than the
"Minimum output on-time" (factory setting 1
minute, adjustable via parameter P49).
CAUTION:
safety limit thermostat (to prevent overtemperatures)
must be provided externally.
35
Contents
Functions (continued)
FAN CONTROL
3-position control signal
Output Y11 provides the OPEN command, and Y21 the
CLOSE command to the 3-position actuator.
The factory setting for the actuator's running time is 150
seconds. It can be adjusted via parameter P44.
The parameter is only visible if 3-position is selected via
DIP switches.
Synchronization
1. When the thermostat is powered up, a closing
command for the actuator running time + 150% is
provided to ensure that the actuator fully closes and
synchronizes to the control algorithm.
2. W
hen the thermostat calculates the positions "fully
close" or "fully open", the actuator's running time
is extended + 150% to ensure the right actuator
position is synchronized to the control algorithm.
3. After the actuator reaches the position calculated
by the thermostat, a waiting time of 30 seconds is
applied to stabilize the outputs.
The fan operates in automatic mode or at the selected
speed with manual mode.
In automatic mode, the fan speed depends on the
setpoint and the current room temperature. When the
room temperature reaches the setpoint, the control
valve closes and the fan switches off or stays at fan
speed 1 (parameter P60; factory setting: 0 = fan speed
1 in dead zone).
an command value
F
Enable fan command value
The fan speed and mode can be changed via bus.
For this purpose, the fan command value needs to be
enabled
onctionnement de la ventilation
F
Étage de ventilation 1-2-3
Sortie de ventilation
The fan speed and mode can be monitored via bus.
•3
-speed fan control
with modulating heating / cooling control
The individual switching points for ON of each fan stage
can be adjusted via control parameters P55…P57. The
fan speed switch off point is 20% below the switch on
point. The diagrams below show fan speed control for
modulating PI control.
Control outputs configuration
(setting via DIP switches or tool)
The type of the control outputs on 2-pipe applications
(2- or 3-position) is set via DIP switches (see page 17).
The DIP switches have no impact if the application is
commissioned via tool.
36
Functions (continued)
Q
2. The maximum switching range of the fan (XpHFan
/ XpCFan) is defined by the switching differential
(SDH/SDC) via a look-up table.
Q3
Y
Q2
1
Q1
YH[%]
YC[%]
100
XDZ
W
0
XpC
W Room temperature setpoint
Q Fan speed
YH Control demand "Heating"
YC Control demand "Cooling"
XpH Proportional band "Heating"
XpC Proportional band "Cooling"
XDZ Dead zone
T[°C]
Q
100
W
XpH
XDZ
SDH
SDC
Q3
Q2
Q1
XpHfan
W
XpCfan
T[°C] Room temperature
W Room temperature setpoint
Q Fan speed
Y Control command "Valve"
SDH Switching differential "Heating"
SDC S
witching differential "Cooling"
XDZ Dead zone
XpHfan Switching range for fan "Heating"
XpCfan Switching range for fan "Cooling"
NOTE:
The diagram only shows the PI thermostat’s
proportional part.
• 3-speed fan control
with ON/OFF heating / cooling control
On applications with 2-position control:
1. The switching point for low fan speed (Q1) is
synchronized to the heating / cooling output.
Parameter "Switching point fan speed low" P57 is
not relevant.
37
T[°C]
Contents
Functions (continued)
Look-up table with ON/OFF control
In automatic fan mode and with the room temperature in
the dead zone, the control valve is normally closed and
SDH/SDC
[K] 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 >4.5 the fan disabled. With the "Fan kick" function, the fan can
XpHfan/XpHfan [K] 2 3 4 5 6 7 8 9 10 be released from time to time at low speed for minimum
on-time (see above) even if the valve is closed.
This function can be used to avoid damage from
moisture due to a lack of air circulation, or to allow a
1-speed / 3-speed fan
return air temperature sensor to acquire the correct
The thermostat can control a 1- or 3-speed fan (selected
room temperature.
via control parameter P53). A 1-speed fan is connected
to terminal Q1, a 3-speed fan to terminals Q1, Q2 and
Q3.
Fan operation in dead zone (fan kick)
Y
Fan operation as per heating / cooling mode,
or disabled
Fan operation can be limited to be active with cooling
only or heating only, or even be totally disabled via
control parameter "Fan operation" P52.
When fan operation is disabled, the fan symbol on the
display disappears and pressing the fan button has no
impact.
This function allows you to use the thermostat on
universal applications such as chilled / heated ceilings
and radiator, etc. (see page 32).
Q1
0
Periodic fan kick
Periodic fan kick
Minimum
on-time
t[h:mm]
Minimum
on-time
The periodic fan kick time can be selected individually
for Comfort mode via parameter P60, and for Economy
mode via parameter P61.
NOTE:
Fan kick value "0" means the fan runs continuously
in the dead zone.
Fan kick value "OFF" means the fan does not run in
the dead zone.
Fan minimum on- time
In automatic mode, a dwelling time of 2 minutes (factory
setting) is active. The fan maintains each speed for at
least 2 minutes before it changes to the next speed.
This minimum on-time can be adjusted from 1…6
minutes via parameter P59.
38
Functions (continued)
Fan start
When the fan starts from standstill, it starts at speed 3 for
1 second to ensure safe fan motor start by overcoming
inertia and friction (selected via parameter P58).
Q
Clean fan filter reminder
The "Clean fan filter reminder" function counts the fan
operating hours and displays message "FIL " to remind
the user to clean the fan filter as soon as the threshold
is reached. This does not impact the thermostat's
operation, which continues to run normally.
1 sec
Q3
Fault information
The "Clean filter reminder" is reset when the operating
mode is manually set to Protection and back.
Q2
Q1
0
Fan in Auto Timer mode
T
In Auto Timer mode , the default fan mode is automatic.
The fan mode can be changed to Manual by pressing
the FAN button. The fan returns to the automatic default
mode after each switchover from Comfort to Economy
mode, and vice versa.
Fan overrun for electric heater
When the electric heater is switched off, the fan overruns
for 60 seconds (parameter P54) to avoid overtemperature
of the electric heater or prevent the thermal cutout from
responding.
FAN FAILURE:
In case of fan failure, the thermostat cannot protect
the electric heater against overtemperature. For this
reason, the electric heater must feature a separate
safety device (thermal cutout).
39
Contents
Functions (continued)
MULTIFUNCTIONAL INPUT, DIGITAL INPUT
configured via parameters P38 + P39 for X1 and P40 +
P41 for X2.
The current temperature or state of the inputs X1/X2 is
available on bus for monitoring purposes.
The parameters can be set to the following values:
The thermostat has 2 multifunctional inputs X1 and X2.
An NTC type sensor like the QAH11.1 (AI, analog input)
or a switch (DI, digital input) can be connected to the
input terminals. The functionality of the inputs can be
Heating/ cooling changeover
# Function of input
0 Not used
1 External / return air
temperature
2
Window state
3
Heating /
cooling changeover
Operating
mode switchover
4 Dew point monitor
Description
Type X1/X2
No function.
—
Sensor input for external room temperature sensor or return air
AI
temperature sensor to acquire the current room temperature, or floor
heating temperature sensor to limit the heating output.
NOTE: The room temperature is acquired by the built-in sensor if the
floor temperature limitation function is enabled via parameter P51.
Sensor input for "Automatic heating / cooling changeover" function.
AI / DI
A switch can also be connected rather than a sensor (switch closed =
cooling, see page 19).
Heating / cooling changeover is also possible via bus. In this case, the
function must not be assigned to any local input X1, X2.
Digital input to switch over the operating mode to Economy.
If the operating mode switchover contact is active, user operations are
ineffective and "OFF" is displayed.
Operating mode switchover is also possible via bus. In this case, the
function must not be assigned to any local input X1, X2. See also page
6.
Digital input for a dew point sensor to detect condensation. Cooling is
stopped if condensation occurs.
40
DI
DI
X1, X2 (Temp.) X1, X2 (Digital) Fault information
Enable electric heater
Functions (continued)
# Function of input
Description
Type X1/X2
5
Digital input to enable / disable the electric heater via remote control.
DI
Enable electric
Enable
electric
heater
is
also
possible
via
bus.
In
this
case,
the
function
heater
must not be assigned to any local input X1, X2. See also page 22.
6
7
8
Fault
Monitor input
(Digital)
Monitor input
(Temperature)
Digital input to signal an external fault (example: dirty air filter).
If the input is active, "ALx" is displayed and a fault is sent on the bus.
See also page 43. (Alarm x, with x = 1 for X1, x = 2 for X2).
NOTE: Fault displays have no impact on the thermostat's operation.
They merely represent a visual signal.
Digital input to monitor the state of an external switch via bus.
DI
Sensor input to monitor the state of an external sensor (e.g. QAH11.1)
via bus.
AI
• Operational action can be changed between normally
open (NO) and normally closed (NC) via parameter
P39, P41.
• Each input X1 or X2 must be configured with a different
function (1…5). Exception: 1 or 2 inputs can be
configured as fault (6) or monitor input (7,8).
DI
• X1 is factory-set to "Operating mode switchover" (3),
X2 to "External sensor" (1).
For more detailed information, refer to page 17
"Applications".
41
Contents
Functions (continued)
HANDLING FAULTS
KNX COMMUNICATIONS
Temperature out of range
When the room temperature is outside the measuring
range, i.e. above 49 °C or below 0 °C, the limiting
temperatures blink, e.g. "0 °C" or "49 °C".
In addition, the heating output is activated if the current
setpoint is not set to "OFF", the thermostat is in heating
mode and the temperature is below 0 °C.
For all other cases, no output is activated.
The thermostat resumes Comfort mode after the
temperature returns to within the measuring range.
The thermostats support communications as per the
KNX specification.
S-mode
Standard mode: engineering via group
addresses.
S-mode
This mode corresponds to KNX communications.
Connections are established via ETS Professional by
assigning communication objects to group addresses.
Send heartbeat and receive timeout
In a KNX network, S-mode communication objects can
be exchanged between individual devices. The Receive
timeout defines the period of time within which all the
communication objects requested from a device must
have been received at least once. If a communication
object is not received within this period, a predefined
value is used.
Similarly, the Send heartbeat defines the period of time
within which all the communication objects requested
must be transmitted at least once.
Fixed times are specified as follows:
- Receive timeout: 31 minutes
- Send heartbeat: 15 minutes
For fault status messages on the bus, see page
43.
42
Functions (continued)
Reducing the bus load
Individual zones can also be disabled (out of service) via
control parameter if they are not being used. In disabled
zones, the signal will no longer be periodically sent, and
will therefore reduce bus load.
Heating and cooling demand
Heating output primary
Heating output secondary
Cooling output primary
In S-mode, the current state signals of the control
outputs are available.
Startup
• Startup response
The application is restarted after every reset, so
that all the connected motorized valve actuators are
synchronized (see "Control outputs", 3.7).
• Startup delay
After a reset, it takes up to 5 minutes for all the connected
room thermostats to restart. This is designed to avoid
overloading the mains power supply when restarting.
At the same time, it reduces the load on the KNX
network, as not all thermostats transmit data at the
same time. The delay (TWaitDevice) is determined by
the thermostat's device address. After the delay, the
device starts to send.
Prio.
1
2
3
4
5
6
(
Fault
No fault
Bus power supply (**)
Device address error
Condensation
External fault input X1
External fault input X2
Clean filter reminder
Thermostat
Display
—
BUS
Addr
AL1
AL2
FIL
Fault function on KNX
If a fault occurs (e.g. digital fault input, dew point,
communication configuration, etc.) then a fault will be
sent on the bus.
An thermostat listens on the bus and sends its fault when
the fault has the highest alarm priority. This ensures that
the management station does not miss any alarms.
If alarms occur at the same time, the alarm with the
highest priority will be first displayed and sent on the
bus.
The table below shows the error code and default alarm
texts.
Error code
0
5000
6001
4930
9001
9002
3911
**) This error will not be sent on bus (because there is no bus!)
43
Fault information on bus
Default fault text
No fault
No BUS power supply
>1 id device address
Condensation in the room
Fault input 1
Fault input 2
Dirty filter
Contents
Functions (continued)
Priority of alarms
• Priority order is #1…6
• External faults #4…5: If faults are active, the display
will show AL1, AL2, alternating. On the bus, only the
fault with the highest priority will be sent.
Fault transmission
A supervisor alarm system may command the thermostat
to stop sending faults to the bus via the communication
object "Fault transmission" (disable / enable).
This has no impact on the local display of faults.
After a timeout of 48 hours, the sending of faults will
automatically be enabled again.
44
Functions (continued)
COMMUNICATION OBJECTS (S-MODE)
Overview
Page Object # and name
5
5
5
1 System time
3 Time of day
44 Outside temperature
7
12Room operating mode:
Time switch (1)
7Room operating mode:
Preselection (1)
20Room operating mode:
Window state
7
6,
8,
40
15
15
24
37
37
Thermostat
22Room temperature:
Comfort basic setpoint
23Room temperature:
Comfort setpoint
Object # and name
Page
21 Room temperature
16Room operating mode:
State (1)
24Room temperature:
Current setpoint
5
6
33Fan operation
(0 = Auto / 1 = Manual)
37
35 Fan output
36 Fan stage 1
37
37
37 Fan stage 2
37
38 Fan stage 3
37
25 Heating output primary (2)
26 Heating output secondary (2)
27 Cooling output primary (2)
43
43
43
16
31 Application mode
32Enable fan command value
34Fan command value
45
Contents
Functions (continued)
Page Object # and name
28,
43
Thermostat
Object # and name
Page
41
41
21,
43
21,
39,
42,
44
29Enable electric heater
19,
43
30 Heating/cooling changeover
39/40
X1 (temperature / digital)
41/42
X2 (temperature / digital)
44
6 Fault transmission
5 Fault state
4 Fault information
Input communication object
Output communication object
Input & output communication object
(1) 8-bit and 1-bit object available, selectable via
parameter in ETS
(2)
Availability depending on selected application /
function
46
Functions (continued)
Description of communication objects
Type/
Flags
length
1 System time
Time and
19.001 CWU
date
8 Byte
System time for display on the room thermostat. See
parameter P07 (3 or 4)
Obj. Object name
Function
3
Time of day
4
Fault information Alarm Info
Obj. Object name
7
219.001 CT
6 Byte
Common alarm output. If an alarm occurs, the alarm
number is transmitted
5
Type/
Flags
length
20.102 CWTU
1 Byte
Auto
Comfort
PreComf.
Economy
Protection
Controls the room operating mode selection of the
thermostat via bus.
The command can also be submitted as four 1-bit
communication objects (8...11). The last interaction wins –
either from local operating mode button or via bus.
NOTE: The thermostat will transform Precomfort either into
Economy or Comfort (selectable via P88).
Time and
10.001 CWU
date
3 Byte
Another object for receiving the time of day for display
on the room thermostat. See parameter P07 (3 or 4)
Room operating
mode:
Preselection
Function
8 Operating mode: Trigger
1.017
CW
9 Preselection
1 bit
10 Auto Comf
11 Eco Prot
Switch room operating mode to either Auto, Comfort,
Economy or Protection.
The last interaction wins – either from the local operating
mode button or via bus.
Fault state
Faulty /
1.005
CT
normal
1 bit
Common alarm output. If an alarm occurs, the alarm
flag is set
6
Fault transmission Enable /
1.003
CWU
disable
1 bit
A supervisor alarm system can disable the broadcasting
of alarms by the devices. This has no impact on the
local display of alarms. After a timeout of 48 hours, the
sending of faults will automatically be enabled again.
47
Contents
Functions (continued)
Obj. Object name
12 Room operating
mode: Time
switch
Function
Type/
length
20.102
1 Byte
Obj. Object name
Flags
Function
Type/
length
1.002
1 bit
Flags
17 Room operating ON
CT
18 mode:
OFF
19 State Comfort
State Economy
State Protection
Corresponding communication object sends "True".
Comfort
CWU
Economy
PreComf.
Protection
This information is provided by a central time switch or
a supervisor and defines the actual HVAC operating
mode. The command can also be submitted via three
1-bit communication objects (13...15).
Protection has the highest priority and cannot be
overridden.
NOTE: The thermostat will transform Precomfort either
into Economy or Comfort (selectable P88).
20 Window state
Open
1.019
CWU
Closed
1 bit
The thermostat is set to Economy mode if value "1"
(open) is received. It switches back to the previous
mode when the value is "0" (closed).
"Window state" is sent e.g by a KNX switch or a KNX
presence detector. It has the same effect as the local
operating mode switchover contact X1, X2 (parameter
P38, P40).
Only one input source must be used, either local input
X1/X2 or KNX bus. .
13 Time switch
Trigger
1.017
CW
14 Comfort Economy
1 bit
15 Protection
Switch the HVAC mode to either Comfort, Economy or
Protection mode.
16 Room operating
mode: State
Comfort
20.102 CRT
Economy
1 Byte
Protection
Effective room operating mode used by the thermostat
(considering time switch, user selection, window
contact, etc.) This state information is available via one
8-bit enumeration or three 1-bit communication objects
(17...19). Note: The thermostat does not support
Precomfort.
21 Room
Temp. value 9.001
CRT
temperature
2 Bytes
The value of the room temperature measured via builtin or external sensor is available via this communication
object.
48
Functions (continued)
Obj. Object name
Type/
Flags
length
24 Current setpoint Temp. value 9.001
CRT
2 Bytes
Current setpoint, including shift, compensation, etc.,
used by the thermostat for temperature control.
Type/
Flags
length
Temp. value 9.001
CWU
2 Bytes
Obj. Object name
Function
22 Room
temperature:
Comfort basic
setpoint
If function "Temporary setpoint" is enabled via parameter
P69, then after an operating mode change, the setpoint
adjustments made by the user and via communication
object 23 will be dismissed and the thermostat will be
reset to the Comfort basic setpoint.
NOTE: Setpoints that have been changed via the local
HMI may be overwritten during a system startup from a
central master controller.
The Comfort basic setpoint is stored in EEPROM
(see page 15)
The service life of the EEPROM
depends on the number of write cycles. Never write this
communication object cyclically!
Function
25 Heating output
0…100 %
5.001
CRT
primary
8 bit
Indicates the position of the heating actuator of first
stage.
E.g. 2-pipe with electric heater application: Output of
heating coil.
26 Heating output
0…100 %
5.001
CRT
secondary
8 bit
Indicates the position of the heating actuator of
the second stage. E.g. 2-pipe with electric heater
application: Output of the electric heater.
23 Room
Temp. value 9.001
CWTU
temperature:
2 Bytes
Comfort setpoint
Communication object used to shift the setpoint used
by the thermostat (voir page 15). Same priority as local
setpoint shift on the thermostat. The last intervention
wins.
NOTE: The Comfort basic setpoint (object 22) will not
be changed.
27 Cooling output
0…100 %
5.001
CRT
primary
8 bit
Indicates the position of the cooling actuator of the
first stage. E.g. 2-pipe with electric heater application:
Output of the cooling coil.
49
Contents
Functions (continued)
Obj. Object name
29 Enable electric
heating
Function
Type/
length
1.003
1 bit
Obj. Object name
Flags
32 Enable fan
command value
Function
Type/
length
1.003
1 bit
Flags
Enable
CWU
Disable
Set fan mode to Auto (disable) or Manual (enable) by a
KNX control unit. If Manual, the value received on Fan
command value (34) will be used to command the fan
speed.
Default: Enable
The last interaction wins – either from the local fan
mode button or via bus.
Enable /
CWU
disable
An electric heater can be disabled with this
communication object (e.g. to meet tariff regulations).
The same function is also available via local
multifunctional input X1/X2 (parameter P38, P40).
Only one input source must be used, either local input
X1/X2 or KNX bus.
30 Heating / cooling Heat / Cool 1.100
CWU
changeover
1 bit
Changeover information transmitted via bus. Default:
Current mode before power down.
The same function is also available via local
multifunctional input X1/X2 (parameter P38, P40).
Only one input source must be used, either local input
X1/X2 or KNX bus.
33 Fan operation
Auto
1.001
CRT
Manual
1 bit
Indicates the status of the fan mode: Auto (0) or Manual (1).
34 Fan command
0…100 %
5.001
CWU
value
8 bit
The fan can be set to a specified speed by a KNX control
unit when manual fan operation is enabled.
Speed
1
2
3
31 Application
mode
HVAC
20.105 CWU
control
8 bit
mode
0 Auto (default)
Heating and/or cooling
1 Heat
Heating only
2 Morning warmup* Heating only
3 Cool
Cooling only
5 Precool*
Cooling only
6 OFF
Neither heating nor cooling
8 Emergency heat* Heating only
9 Fan only
Fan runs at high speed
* Function handled like Heat (1) or Cool (3)
Fan command value (physical KNX value)
1...33% (1...85)
34...67% (86...170)
68...100% (171...255)
Fan speed "0" is not supported by the thermostat and
the fan speed will remain unchanged.
50
Functions (continued)
CONTROL PARAMETERS
Type/
Flags
length
35 Fan output
0…100%
5.001
CRT
8 bit
Indicates the current fan speed as a value 0...100%.
Obj. Object name
Speed
OFF
1
2
3
Function
A number of control parameters can be readjusted to
optimize control performance. This can be done on the
thermostat via HMI or via commissioning / operating
tool. These parameters can also be set during operation
without opening the unit.
In the event of a power failure, all control parameter
settings are retained.
The control parameters are assigned to 2 levels:
• "Service level", and
• "Expert level" including communications, diagnostics
and test.
The "Service level" contains a small set of parameters to
set up the thermostat for the HVAC system and to adjust
the user interface. These parameters can be adjusted
any time.
Change parameters at the "Expert level" carefully, as
they impact the thermostat’s control performance and
functionality.
Fan output (physical KNX value)
0% (0)
33% (84)
66% (186)
100% (255)
36 Fan speed 1
ON
37 Fan speed 2
OFF
38 Fan speed 3
Indicate the state of the relay outputs.
1.001
1 bit
CRT
39 X1: Temperature Temp. value 9.001
CRT
40 X2: Temperature
2 Byte
Indicate the values of the temperature sensors connected
to the local inputs X1 / X2
Parameter setting via local HMI
• Enter only "Service" level
1. Press buttons + and – simultaneously for 3 seconds.
Release and press button + again for 3 seconds
within 2 seconds. The display shows "P01". Continue
with step 2.
• Enter "Service" and "Expert" level
1. Press buttons + and – simultaneously for 3 seconds.
Release and press button – again for 3 seconds
within 2 seconds. The display shows "P01" and
service.
41 X1: Digital
ON
1.001
CRT
42 X2: Digital
OFF
1 bit
Indicate the status of the digital inputs (adjusted by
parameters P39/P41) including considering of operating
action.
44 Outside
Temp. value 9.001
CWU
temperature
2 Byte
The outside temperature measured by a KNX sensor can be
displayed on the thermostat, if parameter P07 "Additional
user information" is set = 2 (outside temperature).
51
Contents
Functions (continued)
• Adjust parameters
2. Repeatedly press the + or – button to select the
required parameter.
+ P01 - + P02 -
+ P08 -
NOTE:
The KNX thermostats require version ETSf or higher.
+ P13 - + P14 - + End -
Connecting a KNX tool
Connecting a KNX commissioning / operating tool to the
is described in page 60.
3. Press + and – simultaneously. The current value of
the selected parameter begins to flash, allowing you
to change the value by repeatedly pressing + or –.
4. The next parameter is displayed when you press +
and – again simultaneously.
5. Repeat steps 2 to 4 to display and change additional
parameters.
6. Press + or – until "End" is displayed, and then press
+ and – simultaneously to save the change and exit
parameter entry mode.
• Reset parameters
The factory setting for the control parameters can be
reloaded via parameter P71, by changing the value
to "ON", and confirming by pressing buttons + and
– simultaneously. The display shows "8888" during
reload.
Parameter setting / download via tool
ETS Professional
Control parameters can be adjusted via local HMI
or bus via ETS by parameter download during
commissioning.
52
Functions (continued)
Parameter
Parameters of the "Service level"
Service level
Factory setting
P01 Control sequence
2-pipe:
1 = Cooling only
4-pipe:
4 = Heating and Cooling
P02 Operation via room op
selector
1
P04 Unit
C (0)
P05 Measured value correction
P06 Standard display
0K
0
P07 Additional display information
0
P08
P09
P10
P11
21 °C
5 °C
35 °C
15 °C
Comfort basic setpoint
Comfort setpoint minimum
Comfort setpoint maximum
Economy heating setpoint
P12 Economy cooling setpoint
30 °C
53
Range
0 = Heating only
1 = Cooling only
2 = H/C changeover manual
3 = H/C changeover auto
4 = Heating and Cooling
1 = Auto – Protection
2 = Auto - Comfort - Economy - Protection
C = ° Celsius
F = ° Fahrenheit
– 3 ... 3 K
0 = Room temperature
1 = Setpoint
0 = --- (No display)
1 = °C and °F
2 = Outside temperature (via bus)
3 = Time of day (12h) (via bus)
4 = Time of day (24h) (via bus)
5 ... 40 °C
5 ... 40 °C
5 ... 40 °C
OFF, 5 ... WCoolEco;
WCoolEco = 40 °C max
OFF, WHeatEco ... 40 °C;
WHeatEco = 5C min
Contents
Parameter
Functions (continued)
Service level
Factory setting
P13 Electric heater when cooling
ON
P14 Button lock
0
Range
ON: Enabled
OFF: Disabled
0 = Unlocked
1 = Auto lock
2 = Manual lock
NOTE:
Parameter display depends on selected application and function.
Parameter
Parameters of the "Expert level with diagnostics and test"
P30
P31
P33
P34
P35
P36
P37
Expert level
Heat P-band Xp / switching diff
Cool P-band Xp / switching diff
Dead zone Comfort mode
Setpoint differential
Integral action time Tn
H/C ch'over swi point cooling
H/C ch'over swi point heating
Factory setting
2K
1K
2K
2K
5 min
16 °C
28 °C
Range
0.5 … 6 K
0.5 … 6 K
0.5 … 5 K
0.5 … 5 K
0…10 min
10…25 °C
27…40 °C
54
Parameter
Functions (continued)
Expert level
Factory setting
P38 Input X1
3 = Op mode c/o
P39 Normal position input X1
0 (N.O.)
P40 Input X2
1 = Ext. sensor
P41 Normal position input X2
0 (N.O.)
Range
P48 On time minimum 2-pos
output
P49 Off time minimum 2-pos
output
P50 Purge time
1 min.
0 = --- (no function)
1 = Room temp ext. sensor /
Return air temp (AI)
2 = H/C changeover (AI/DI)
3 = Operating mode contact (DI)
4 = Dew point sensor (DI)
5 = Enable electric heater (DI)
6 = Fault input (DI)
7 = Monitor input (Digital)
8 = Monitor input (Temp)
0 = Normally open / Open
1 = Normally closed / Close
0 = --- (no function)
1 = Room temp ext. sensor /
Return temp (AI)
2 = H/C changeover (AI/DI)
3 = Operating mode contact (DI)
4 = Dew point sensor (DI)
5 = Enable electric heater (DI)
0 = Normally open / Open
1 = Normally closed / Close
20…300 sec
0 = 3-position
1 = 2-position
1...20 min
1 min.
1...20 min
OFF
P51 Flow temp limit floor heating
OFF
OFF:
Not active
1…5 min: Active with selected duration
OFF, 10...50 °C
P44 Actuator running time Y11/Y21 150 s
P46 Output Y11/Y21
ON/OFF (1)
55
Contents
Parameter
Functions (continued)
Expert level
Factory setting
Range
P52 Fan control
1
P53 Fan speeds
3-speed
P54 Fan overrun time
P55 Fan speed switching point
high
P56 Fan speed switching point
med
P57 Fan speed switching point low
P58 Fan start kick
60 sec
100%
0 = Disabled
1 = Enabled
2 = Heating only
3 = Cooling only
1 = 1-speed
2 = 3-speed
0...360 sec
80...100%
65%
30..75%
10%
ON
P59
P60
P61
P62
P65
2 min
0
OFF
Off (0)
8 °C
1...15%
ON: Enabled
OFF: Disabled
1...6 min
0…89 min, OFF(90)
0…359 min, OFF(360)
Off, 100…9900 h
OFF, 5…WCoolProt;
WCoolProt = 40 °C max
OFF, WHeatProt… 40;
WHeatProt = 5 °C min
0...360 min
OFF = Disabled
ON = Enabled
OFF = Disabled
ON = Reload start
"8888" is displayed for 3s during
reload process
On time minimum fan
Periodic fan kick Comfort
Periodic fan kick Eco
Service filter
Protection heating setpoint
P66 Protection cooling setpoint
OFF
P68 Temporary Comfort mode
P69 Temporary Comfort setpoint
0 (= OFF)
OFF
P71 Restore factory setting
OFF
56
Parameter
Functions (continued)
P81
P83
P84
P85
P88
Communications
Device address (1)
Geographical zone (room)
Heat distr zone heating coil
Refrig distr zone cooling coil
Transformation Precomfort
Factory setting
255
1
----0
Range
1…255
---, 1...63
---, 1...31
---, 1...31
0 = Economy
1 = Comfort
Physical address = Area.Line.DeviceAddress. Factory setting for Area = 0, Line = 2s.
Can be changed by special management service e.g. from line coupler or via ACS commissioning tool.
(2)
Type = geographical zone A.R.S. In sub zone = fixed value 1
(1)
57
Contents
Parameter
Functions (continued)
Diagnostics & test
Range
d01 Application number
d02 X1 state
d03 X2 state
d05 Test mode for checking the Y11/Y21 actuator's running
direction (3)
(3)
NONE = (No application)
2P = 2-pipe
2P3P = 2-pipe 3-position
2PEH = 2-pipe with electric heater
4P = 4-pipe
0
= Not activated (for DI)
1
= Activated (DI)
0…49 °C = Current temp. value (for AI)
00
= H/C Input shorted
100 = H/C Input open
0
= Not activated (for DI)
1
= Activated (DI)
0…49 °C = Current temp. value (for AI)
00 = H/C Input shorted
100 = H/C Input open
"---" = no signal on outputs Y11 and Y21
OPE = output Y11 forced opening
his parameter can only be quit when the setting is back at "---".
T
Press buttons + and – simultaneously to escape.
58
Handling
MOUNTING AND INSTALLATION
• Isolate the cables of SELV inputs X1-M/X2-M for 230 V
if the conduit box carries AC 230 V mains voltage.
• Inputs X1-M or X2-M: Several switches (e.g. summer /
winter switch) may be connected in parallel. Consider
overall maximum contact sensing current for switch
rating.
• Isolate the cables of KNX communication input CE+ /
CE- for AC 230 V if the conduit box carries AC 230 V
mains voltage.
• No metal conduits.
• No cables provided with a metal sheath.
• Disconnect from supply before opening the cover.
Mount the room thermostat on a recessed rectangular
conduit box with 60.3 mm fixing centers. Do not mount
on a wall in niches or bookshelves, behind curtains,
above or near heat sources, or exposed to direct solar
radiation. Mount about 1.5 m above the floor.
in
1.5 m
0.2 m m
Mounting
• Mount the room thermostat in a clean, dry indoor place
without direct airflow from a heating / cooling device,
and not exposed to dripping or splash water.
Wiring
• Comply with local regulations to wire, fuse and earth
the thermostat.
• Properly size the cables to the thermostat, fan and
valve actuators for AC 230 V mains voltage.
• Use only valve actuators rated for AC 230 V.
• The AC 230 V mains supply line must have an external
fuse or circuit breaker with a rated current of no more
than 10 A.
59
Contents
Handling (continued)
COMMISSIONING
Applications
The room thermostats are delivered with a fixed set of
applications.
Select and activate the relevant application during
commissioning using one of the following tools:
- Local DIP switch and HMI
- ETS Professional
Connect tool
Connect the ETS Professional tools to the KNX bus
cable at any point for commissioning:
KNX
KNX
X2
KNX
Legrand
0 035 47
CE+ CEY11
DIP switches
Set the DIP switches before snapping the front panel to
the mounting plate, if you want to select an application
via DIP switches.
All DIP switches need to be set to "OFF" (remote
configuration), if you want to select an application via
commissioning tool.
After power is applied, the thermostat resets and all
LCD segments flash, indicating that the reset was
correct. After the reset, which takes about 3 seconds,
the thermostat is ready for commissioning by qualified
HVAC staff.
If all DIP switches are OFF, the display reads "NONE"
to indicate that application commissioning via a tool is
required.
Legrand
0 035 43
Y21 N1
IP
ETS
USB
ETS
ETS require an interface:
- RS232 KNX interface
NOTE:
An external KNX bus power supply is required if a
thermostat is connected directly to a tool (ETS) via
KNX interface.
Control parameters
The thermostat's control parameters can be set to
ensure optimum performance of the entire system.
The parameters can be adjusted using
- Local HMI
- ETS Professional
The control parameters of the thermostat can be set to
ensure optimum performance of the entire system (see
page 51, control parameters).
NOTE:
Each time the application is changed, the thermostat
reloads the factory setting for all control parameters,
except for KNX device and zone addresses!
60
Handling (continued)
Control sequence
• The control sequence may need to be set via
parameter P01 depending on the application.
The factory setting is as follows:
Application
2-pipe and chilled /
heated ceiling
4-pipe, chilled ceiling
and radiator
Programming mode
The programming mode helps identify the thermostat in
the KNX network during commissioning.
Press buttons "operating mode" and "+" simultaneously
for 6 sec to activate programming mode, which is
indicated on the display with "PrOg".
Programming mode remains active until thermostat
identification is complete.
Factory setting P01
1 = cooling only
4 = heating and cooling
Compressor-based applications
• When the thermostat is used with a compressor,
adjust the minimum output on-time (parameter
P48) and OFF-time (parameter P49) for Y11/Y21
to avoid damaging the compressor or shortening
its life due to frequent switching.
Assign KNX group addresses
Use ETS Professional to assign the KNX group
addresses of the thermostat's communication objects.
KNX serial number
Each device has a unique KNX serial number inside
the front panel. An additional sticker with the same
KNX serial number is enclosed in the packaging box.
This sticker is intended for installers for documentation
purposes.
Calibrate sensor
• Recalibrate the temperature sensor if the room
temperature displayed on the thermostat does not
match the room temperature measured (after min.
1 hour of operation). To do this, change parameter
P05.
Assign KNX device address
Assign device address (P81) via HMI or ETS.
With device address set to 255, the communication is
deactivated (no exchange of process data).
Setpoint and range limitation
• We recommend to review the setpoints and
setpoint ranges (parameters P08…P12) and
change them as needed to achieve maximum
comfort and save energy.
61
Contents
Handling (continued)
OPERATION
User action
Press left button
LAYOUT
1
Press left button (P01 = 2) Toggle between heating and
cooling
Press left button while
Activate "Extend Comfort
"Operating mode
mode"
switchover" via bus is
(for details, see page 16)
activated
Press left button
Activate / deactivate button lock
>5 seconds
Press right button
Change fan mode
2
Press + or –
3
1 Operating mode selector
2 Button to change fan operation
3 Buttons to adjust setpoints and control
Press + and –
>3 seconds, release,
then press + again
>3 seconds
Press + and –
>3 seconds, release,
then press – again
>3 seconds
Press operating
mode button and "+"
simultaneously
for 6 seconds
BUTTON OPERATION
User action
Normal operation
Press any button
(thermostat in normal
operation)
Effect, description
Change operating mode
Effect, description
Actual operating mode and
state are indicated by symbols
Backlit LCD turns on and…
(see below for further action).
After the last operation and
a timeout of 20 seconds, the
LCD backlight turns off
62
Adjusts the Comfort room
temperature setpoint .
Thermostat changes to
Comfort mode.
Go to parameter setting mode
"Service level"
Go to parameter setting mode
"Expert level", diagnostics and
test
Accès au mode de
programmation (KNX)
Handling (continued)
°C
°F
DISPLAY
4
5
2
7
°C
°F
6
10
°C
°F
°C
°F
8
6
3
9
°C
°F
°C
°C
°F in room
°F Condensation
°C °C
°F °F
°C
(dew point sensor
active)
°F
°C
°F
°C
°F
Indicates fault or reminder
°C
°F
7
Temporary Comfort mode extension active
°C
°F
°C
°F
1 Operating
mode
°C
°F
Protection
°C
°C
Comfort °F °F
Economy
8 Additional user information, like outside temperature
°C from KNX bus. Selectable via
or time of day
°F
°C
parameters
°F
°C
°F
9
Auto Timer according to schedule (via bus)
°C
°F
room
°C
°F
°C
4 Heating
/ cooling mode
°F
Cooling
Heating
°C
°F Electric heater active
5
1
°C
°F
°C
°F
°C
°F
°C
°F
Button lock active
10 Weekday 1…7 from KNX bus
(1 = Monday / 7 = Sunday)
2 Displays°C
temperature, setpoints and control
°F
parameters.
°C
°F
Symbol indicates
current room temperature
DISPOSAL
°C
°F
3 Fan mode °C
°F °C
°F
Auto fan active
Fan speed: low, medium, high
The device is classified as waste electronic
equipment in terms of the European Directive
2002/96/EC (WEEE) and should not be disposed
of as unsorted municipal waste.
The relevant national legal rules must be adhered
to. Regarding disposal, use the systems setup for
collecting electronic waste.
Observe all local and applicable laws.
63
Contents
Supported KNX tools
ETS PROFESSIONAL
Parameter settings in ETS Professional
For setting the parameters, open the project and select
a device. To start the parameter settings, select Edit,
then Edit parameters.
ETS PROFESSIONAL
ETS Professional is an engineering tool. It is used
to set up the communication of the thermostat and
assigns the communication object to group addresses
(S-mode).
All other parameters are only used for choosing (making
visible / hiding) the communication objects!
This Manual does not describe how to operate ETS
Professional and commission a device. Refer to the
KNX Manual for more details.
NOTE:
Setting RDF KNX parameters is only supported by
ETSf or higher.
NOTE:
The tool required is ETS Professional version 3f or
higher!
64
Connection
CONNECTION TERMINALS
CONNECTION DIAGRAMS
L
N
SELV
Application
X1 M X2
Q1 Q2 Q3
Y11
CE+ CE-
L
KNX
N Y21
S1
F
10 A
L, N Operating voltage AC 230 V
Q1 Control output "Fan speed 1 AC 230 V"
Q2 Control output "Fan speed 2 AC 230 V"
Q3 Control output "Fan speed 3 AC 230 V"
Y11,Y21 Control output "Valve" AC 230 V (NO,
for normally closed valves), output for
compressor or output for electric heater
X1, X2 Multifunctional inputs for temperature sensor
(e.g. QAH11.1) or potential-free switch
Factory setting:
- X1 = Operating mode switchover contact
- X2 = External sensor
(function can be selected via parameters P38
/ P40).
M Measuring neutral for sensor and switch
CE+ KNX data +
CE- KNX data -
S2
B1 T
L
T
B2
X1 M X2
N Q1 Q2 Q3
I
Y11
II III
M1
5(2)A
max.
N
CE+ CE-
2-pipe,
2-position
Y1
5(2)A
max.
2-pipe,
3-position
Y21 N1
Y1
5(2)A
max.
2-pipe and
electric
heater
Y1
E1
5(2)A
max.
5(2)A
max.
4-pipe
1-stage
compressor
(heating
and/or
cooling)
1-stage
compressor
and electric
heater
65
Y1
Y2
5(2)A
max.
5(2)A
max.
C1
C2
5(2)A
max.
5(2)A
max.
C1
5(2)A
max.
E1
5(2)A
max.
N1 Room thermostat
M1 1- or 3-speed fan
Y1 Valve actuator, 2- or
3-position
Y1, Y2 Valve actuator,
2-position
E1 Electric heater
C1 1-stage compressor
F External fuse
S1, S2 Switch (keycard,
window contact,
presence
detector, etc.)
B1, B2 Temperature
sensor (return
air temperature,
external room
temperature,
changeover
sensor, etc.)
CE+ KNX data +
CE- KNX data –
Contents
Mechanical design
GENERAL
DIMENSIONS
The thermostats consist of 2 parts:
• Front panel with electronics, operating elements and
built-in room temperature sensor.
• Mounting base with power electronics. The rear of the
mounting base carries the screw terminals.
The base fits on a rectangular conduit box with 60.3 mm
fixing centers.
Slide the front panel in the mounting base and snap on.
Dimensions in mm
55
93
54
93
22
13
2
1
41.5
4.5
67
52.5
3
1 Operating mode selector
2 Button for fan operation
3 Buttons to adjust setpoints and control parameters.
For operation, refer to page 62
60
66
Technical data
POWER SUPPLY
KNX BUS
Operating voltage: AC 230 V +10/-15%
Rated voltage: AC 230 V
Frequency: 50/60 Hz
Power consumption: Max. 4 VA / 3.4 W
Interface type: KNX, TP1-64
(electrically isolated)
Bus current: 20 mA
OPERATIONAL DATA
OUTPUTS
Switching differential (adjustable)
Heating mode (P30): 2 K (0.5...6 K)
Cooling mode (P31): 1 K (0.5...6 K)
Fan control Q1, Q2, Q3-N: AC 230 V
Rating: Max. 5(2) A
Control output Y11-N / Y21-N (NO) : AC 230 V
Rating: Max. 5(2) A
Setpoint setting and range
Comfort (P08): 21 °C (5...40 °C)
Economy (P11-P12): 15 °C/30 °C (OFF, 5...40 °C)
Protection (P65-P66): 8 °C/OFF (OFF, 5...40 °C)
INPUTS
Multifunctional input X1-M/X2-M
Temperature sensor input:
Type : QAH11.1 (NTC)
Temperature range: 0...49 °C
Cable length: Max. 80 m
Multifunctional input X1/X2 (Selectable 0...8)
Input X1 default value (P38): 3 (operating mode
switchover)
Input X2 default value (P40): 1 (external temperature
sensor)
Digital input:
Operating action
Contact sensing: Selectable (NO/NC)
Insulation against mains voltage (SELV):
SELV 0...5 V/max. 5 mA
4 kV, reinforced insulation
Parallel connection of several thermostats for one
switch: max. 20 thermostats par commutateur
Built-in room temperature sensor
Measuring range: 0 …49 °C
Accuracy at 25 °C (after calibration via P05): < ± 0.5 K
Temperature calibration range: ± 3.0 K
Settings and display resolution
Setpoints: 0.5 °C
Current temperature value displayed: 0.5 °C
Function of inputs (Selectable)
External temperature sensor, heating / cooling
changeover sensor, operating mode switchover
contact, dew point monitor contact, enable electric
heater contact, fault contact, monitoring input:
X1 : P38
X2 : P40
67
Contents
Technical data (continued)
ENVIRONMENTAL CONDITIONS
Electromagnetic compatibility
Emissions: IEC/EN 61000-6-3
Immunity: IEC/EN 61000-6-2
Operation: IEC 721-3-3
Climatic conditions: Class 3K5
Temperature: 0...50 °C
Humidity: <95 % r.h.
Safety class: II as per EN 60730
Pollution class: Normal
Transport: IEC 721-3-2
Climatic conditions: Class 2K3
Temperature: -25...60 °C
Humidity: <95 % r.h.
Mechanical conditions: Class 2M2
Degree of protection of housing: IP30 as per
EN 60529
GENERAL
Stockage
Climatic conditions: Class 1K3
Temperature: -25...60 °C
Humidity: <95 % r.h.
Connection terminals
Solid wires or prepared stranded wires
1 x 0.4…2.5 mm²
or 2 x 0.4…1.5 mm²
STANDARDS AND DIRECTIVES
Housing front color
0 490 29 = RAL 9003 white
0 490 30 = RAL 9005 black
conformity
EMC directive: 2004/108/CE
Low-voltage directive: 2006/95/CE
Weight
0.274 kg
C
-tick conformity to EMC emission standard
AS/NZS 61000.6.3: 2007
RoHS Reduction of hazardous substances
2002/95/EC
2002/95/CE
Product standards
Automatic electric controls for household and similar
use: EN 60730–1
Special requirements for temperature-dependent
controls: EN 60730–2-9
Electronic control type: 2.B (micro-disconnection on
operation)
Home and Building Electronic Systems:
EN 50090-2-2
68
Index
1
1-speed fan..................................................................35
D
Dew point monitoring.............................................22, 40
Disposal.......................................................................63
3
3-position control signal...............................................32
3-speed fan..................................................................35
E
Effect of Protection via time schedule.........................12
Electric heater.............................................................28
Enable / disable electric heater.............................29, 35
Expert level parameters..............................................54
Extension of Comfort mode........................................13
External / return air temperature.................................35
External / return air temperature sensor.....................19
A
Applications overview..................................................18
Auto Timer mode.........................................................12
Automatic heating / cooling changeover................19, 21
Automatic heating / cooling changeover via bus.........19
B
Basic application.........................................................29
Button lock...................................................................22
F
Fan in Auto Timer mode..............................................36
Fan kick function..........................................................36
Fan minimum on-time..................................................36
Fan operation as per heating / cooling mode, or
disabled.......................................................................38
Fan operation in dead zone.........................................38
Fan overrun.................................................................36
Fan start......................................................................39
Fault.............................................................................42
Fault on KNX...............................................................42
Fault, handling.............................................................42
Floor cooling................................................................20
Floor heating................................................................20
Floor temperature limitation function...........................21
C
Changeover switch......................................................19
Chilled / heated ceiling applications............................29
Clean fan filter reminder..............................................36
Compressor applications.......................................18, 29
Control outputs configuration......................................33
Control outputs overview.............................................32
Control parameters......................................................45
Control sequences.......................................................21
Cooling demand..........................................................43
Cooling sequence........................................................21
69
Contents
Index (continued)
H
Heating / cooling changeover................................19, 40
Heating and cooling sequence....................................21
Heating demand..........................................................43
Heating sequence.......................................................21
P
PWM............................................................................32
R
Radiator applications...................................................29
Remote heating / cooling changeover.........................54
Reset parameters........................................................52
I
Integral action time......................................................54
M
Main and secondary....................................................30
Manual heating / cooling changeover..........................20
Manually select heating or cooling sequence..............21
Minimum output...........................................................20
Moisture.......................................................................20
Mounting and installation.............................................59
Multifunctional inputs...................................................40
S
Sensor input................................................................40
Setpoint Comfort mode...............................................33
Setpoint Economy mode.............................................33
Setpoint limitation........................................................15
Setpoint Protection mode............................................34
Setpoints and sequences............................................34
Standby / Protection mode............................................9
Switching differential...................................................10
Synchronization...........................................................32
O
ON/OFF control signal.................................................32
Operating mode
Priority intervention........................................................8
Operating mode button................................................62
Operating mode switchover...........................................8
T
Temperature out of range............................................42
Temporary setpoint......................................................15
Time schedule change mode......................................62
P
Parameter setting........................................................51
Precomfort...................................................................13
Proportional band..................................................27, 37
Protection mode / Standby............................................9
Purge function.............................................................20
U
Universal applications..................................................18
W
Window contact..........................................................11
Window state...................................................10, 11, 40
70
LE06946AA-EN
Siège social :
128, av. du Maréchal-de-Lattre-de-Tassigny
87045 Limoges Cedex - France
tél : 05 55 06 87 87
fax : 05 55 06 88 88
www.legrand.com