System air TControl Touch 3s Configuration guide

Systemair GmbH Germany [e-mail] oder http://www.systemair.de/
Operation Manuel
Subject to technical alteration
Issue date: 13.02.2018 A002
A
pplication
Modern design flush mounting fan coil room thermostat, used for individual control of temperature in commercial, industrial and
residential buildings. It is tailored for two-pipe and four-pipe fan coil units with two-wire electric valves. The device combines digital
technology with a large LCD touch screen display, which enables the single room controller to be used intuitively. Integrated 7 day
time clock with 4 time programs.
S
ecurity Advice – Caution
The installation and assembly of electrical equipment should only be performed by authorized personnel.
The product should only be used for the intended application. Unauthorised modifications are prohibited! The product
must not be used in relation with any equipment that in case of a failure may threaten, directly or indirectly, human
health or life or result in danger to human beings, animals or assets. Ensure all power is disconnected before
installing. Do not connect to live/operating equipment.
CAUTION! Risk of electric shock due to live components within the enclosure, especially devices with mains
voltage supply (usually between 90..265 V).
Please comply with
 Local laws, health & safety regulations, technical standards and regulations
 Condition of the device at the time of installation, to ensure safe installation
 This data sheet and installation manual
N
otes on Disposal
As a component of a large-scale fixed installation, Systemair products are intended to be used permanently as part
of a building or a structure at a pre-defined and dedicated location, hence the Waste Electrical and Electronic Act
(WEEE) is not applicable. However, most of the products may contain valuable materials that should be recycled
and not disposed of as domestic waste. Please note the relevant regulations for local disposal.

Page 2 / 22 Issue date: 13.02.2018
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General remarks concerning sensors
Especially with regard to passive sensors in 2-wire conductor versions, the wire resistance of the supply wire has to be considered.
If necessary the wire resistance has to be compensated by the follow-up electronics. Due to self-heating, the wire current affects
the measurement accuracy, so it should not exceed 1 mA.
When using lengthy connection wires (depending on the cross section used) the measuring result might be falsified due to a
voltage drop at the common GND-wire (caused by the voltage current and the line resistance). In this case, 2 GND-wires must be
wired to the sensor - one for supply voltage and one for the measuring current.
Sensing devices with a transducer should always be operated in the middle of the measuring range to avoid deviations at the
measuring end points. The ambient temperature of the transducer electronics should be kept constant. The transducers must be
operated at a constant supply voltage (±0,2 V). When switching the supply voltage on/off, onsite power surges must be avoided.
Remarks to Room Sensors
Location and Accuracy of Room Sensors
The room sensor should be mounted in a suitable location for measuring accurate room temperature. The accuracy of the
temperature measurement also depends directly on the temperature dynamics of the wall. It is important, that the back plate is
completely flush to the wall so that the circulation of air occurs through the vents in the cover. Otherwise, deviations in temperature
measurement will occur due to uncontrolled air circulation. Also the temperature sensor should not be covered by furniture or
similar devices. Mounting next to doors (due to draught) or windows (due to colder outside wall) should be avoided.
The temperature dynamics of the wall will influence the temperature measurement. Various wall types (brick, concrete, dividing
and hollow brickwork) all have different behaviours with regards to thermal variations.
Surface and Flush Mounting
The temperature dynamics of the wall influence the measurement result of the sensor. Various wall types (brick, concrete, dividing
and hollow brickwork) have different behaviours with regard to thermal variations. A solid concrete wall responds to thermal
fluctuations within a room in a much slower way than a light-weight structure wall. Room temperature sensors installed in flush
boxes have a longer response time to thermal variations. In extreme cases they detect the radiant heat of the wall even if the air
temperature in the room is lower for example. The quicker the dynamics of the wall (temperature acceptance of the wall) or the
longer the selected inquiry interval of the temperature sensor is the smaller the deviations limited in time are.
Technical Data
Measuring values
temperature
Output switch contact
Terminal 1..3
3 normally open contacts FanCoil
240 V max. load 3 A
fan stages switchover pause 0,5 s
Terminal 4 | 5
2 normally open contacts heating/cooling
240 V max. load 3 A
Network technology
RS485 Modbus, RTU, half-duplex, baud rate 4.800, 9.600, 19.200 or 38.400, parity: non (2 stopbits), even
or odd (1 stopbit)
Power supply
90..265 V ~
Power consumption
0,9 VA (265 V ~)
Measuring
range temp
+1..+50 °C
Accuracy temperature
±0,5 K (typ. at 21 °C)
Sensor
NTC10k
Inputs
Terminal 7 | 8
input for change-over sensor (NTC 10 K)
Control functions
setpoint adjustment +1..+50 °C, (Default +16..+30 °C)
Display
LCD-module with Touch and LED-illumination
Enclosure
ABS, scratch-resistant acrylic glass
Protection
IP20 according to EN 60529
Connection electrical
terminal block max. 1,5 mm²
Ambient condition
-10..+50 °C, max. 85% rH non-condensing
Weight
160 g
Mounting
flush mounted with standard EU box (Ø=55 mm)

Issue date: 13.02.2018 Page 3 / 22
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M
ounting Advices
For installing or repairing, please make sure the power for the thermostat has been turned off.
1. Insert the screw driver in the plastic teeth of the thermostat to open the enclosure.
2. Please follow the wiring diagram to connect the wires.
3. Fix the thermostat base plate to the wall by using the four screw holes with a distance between the axes of 60mm.
4. Fasten base plate and front cover. Do not press the panel in order to protect LCD.
C
onnection Plan
TContol Touch 3s black – Auto mode wiring diagram for 2-pipe fan coil
TContol Touch 3s black – Manual mode wiring diagram for 2-pipe fan coil
TContol Touch 3s black – wiring diagram for 4-pipe fan coil

Page 4 / 22 Issue date: 13.02.2018
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C
ommissioning
Setting parameter No. 13, the selection of the fan coil system has to be done. 2-pipe or 4-pipe systems can be selected.
Hysteresis: 1 K + 1 minute delay
Operation in 2-pipe system (parameter No. 13 set to 2):
When using a change-over sensor, the thermostat can detect whether the fluid is convenient for cooling or for heating:
 Operation without a change-over sensor:
In the 2-pipe system, a fluid can be used only for cooling or only for heating depending on the temperature of the fluid.
When no change-over sensor is used, heating, cooling and ventilating mode have to be selected manually using MODE
settings (depending on the desired action of the heating/cooling system).
 Operation with a change-over sensor (Auto change-over mode):
By using an change-over sensor, the system recognizes, whether the fluid has the necessary temperature for cooling or
for heating. The heating or cooling control sequence will be automatically selected. When temperature is ≤+19 °C,
cooling mode is activated; when the temperature is ≥+30 °C, the heating mode is active. Configurable via Holding
Register 40010|40011. MODE key has no function in this case.
Operation in 4-pipe system (parameter No. 13 set to 4):
The thermostat switches automatically between cooling and heating. A time delay of approx.. 1 min between cooling/heating mode
changes is implemented to ensure safe and eco-friendly operation. Parameter No.14 has to be set to 1 to enable the device for
operating in auto mode.
Mode selection:
Manual Mode: 2-pipe-System: Cooling  Ventilating  Heating
4-pipe-System: Cooling  Ventilating  Heating  Auto change-over mode (only when parameter No.
14 is set to 1!)
AUTO-Mode: The mode will be selected automatically.
Fan Stage selection:
In Cooling, Heating or Auto mode, following fan stages can be selected: Low  Med  Hi  Auto
In Ventilation mode, following fan stages can be selected: Low  Med  Hi
Ventilation mode can be deactivated by setting parameter No. 15 to “0”.
Auto mode:
Display °C or °F
Display of the units °C or °F can be selected using parameter No. 12. Fahrenheit temperature display range is 32..99 °F, °C
temperature display range is 0..50 °C. Factory default is °C.

Issue date: 13.02.2018 Page 5 / 22
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Note: Under parameter No.1 the temperature offset can be adjusted. This feature should be used if the temperature at the
mounting place of the Room Thermostat is not accurate to the average room temperature.
Temperature Room Temperature set point selection:
By pressing “▲” or “▼” button, the room temperature set point can be adjusted. °C Range is 16..30 °C, Fahrenheit temperature
range is 60..86 °F.
By using parameter No. 4 and No. 5, the set point ranges can be adjusted.
Fan stage/Valve control selection:
Under Fan operation “INDEPENDENT”, the fan will always operate according to the selected or automatically assigned fan stage;
under Fan operation “DEPENDENT”, the fan will be tuned off in case the valve is closed. If the valve is open, the fan will operate
according to the selected or automatically assigned fan stage.
By using parameter No. 16, the “INDEPENDENT” or “DEPENDENT” mode can be selected.
Key lock selection (No. 2), power failure selection (No. 3), screen save mode (No. 7) can be set by Parameters.
Also in parameter No. 7 you are able to read the LCD display status.
Sensor failure alarm:
If the temperature sensor is out of range, the thermostat will switch off the fan and close the valve, error code “E01” will be shown.
Language selection
You can change the display language with parameter No. 11.
Set time format
With parameter No. 8 the time format to 12h or 24h can be defined.
Time setting
Press the “ ” button, to set the time. The changing parameter is blinking, press “▲”or“▼”-button to set:
Order: Year→month→day date→day name→hour→minute→Timer ON hour minute→Timer OFF hour minute →year→…
In case of power loss, the time is backed up for max 2 years.
Set timer
Press the “ ”-button, the parameter to be changed is flashing, the timer will be set on or off.
Finish: Timer on, LCD display ;
Finish: Timer off, LCD display ;
Leave menu:
To delete timer on/off, press the “ ” button, the parameter to be changed is flashing. Then select “ ” or“ , set the time
like the following image to leave the timer mode: “ ” .
The system saves the user settings to set the timer on / off automatically.

Page 6 / 22 Issue date: 13.02.2018
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Selection timer on / off
The timer on/off has 2 options to be selected: single action or rule.
To set, please look up parameter No. 9 in the parameter table.
7 days 4 periods programmable timer
One day is split into 4 periods. The user can set temperature for every period individually.
To set the time zones, please look up parameter No. 10 in the parameter table.
If the user has set a set temperature during operation, the current period runs with the last set temperature. The next period will
adopt the changed settings.
Please follow the instructions below:
Press the “ ” button for more than 5 seconds, the parameter to be changed is flashing. Press the “ ” button
again, the value needs to be changed, appears. (hour, minute, period). Changes in value by pressing ▲” or“▼”. The
following 4 programmable periods can be set.
→ hour → minute →temperature 1 → hour→ minute→ temperature 2
→ hour→ minute→ temperature 3 → hour → minute → temperature 4
Individual passwords setting
Factory default :260

Issue date: 13.02.2018 Page 7 / 22
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C
onfiguration
Parameters
= MODE button
In order to change the parameters, please press the MODE button for more than 5 seconds. Please follow figure below. If you are
asked to enter the password, use “▲”or “▼” key to enter each digit of the password. Press MODE button to switch to the next
digit.
The standard password is 260
.
If the password has been entered correctly, you will see the parameter settings screen as below shown:
Press the MODE button to select the parameter you would like to change. Then use “▲” or “▼” to change the parameter. Please
refer to the parameter table on the following page:
C
ommunication Modbus
For configuration of the Modbus communication, please look up parameter No. 18 in the parameter table.
Communication-section 1..247
Factory default:
1
Address 0:
broadcast address
Communication-Interface: RS485
Communication-Protocol: Modbus-RTU
Baud Rate: 4800 bps / 9600 bps / 19200 bps / 38400 bps (optional)
Factory default: 9600 bps
Parity: no parity / odd parity / straight parity (optional)
Factory default: no parity
Data: 8 bit
Stop: 2 bit

Page 8 / 22 Issue date: 13.02.2018
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No.
Name of parameter
Parameter definition
Factory default
1
Temperature offset: Range -20..+20 K 0
2
Key-lock: 00 = no lock
01 = on/off locked
02 = lock "mode"
03 = lock "on/off" and "mode"
04 = lock " clock "
05 = lock on/off and clock
06 = lock mode & clock
07 = lock on/off & mode & clock
08 = lock fan
09 = lock fan & on/off
10 = lock fan & mode
11 = lock fan & on/off & mode
12 = lock fan & clock
13 = lock fan & clock & on/off
14 = lock fan & clock & mode
15 = lock fan & clock & on/off & mode
16 = lock Temp
17 = lock Temp & on/off
18 = lock temp & Mode
19 = lock temp & on/off &mode
20 = lock Temp & clock
21 = lock temp & clock & on/off
22 = lock temp & clock &mode
23 = lock temp & clock &mode & on/off
24 = lock Temp & fan
25 = lock Temp & fan & on/off
26 = lock temp & fan & Mode
27 = lock temp & fan & on/off &mode
28 = lock Temp & fan & clock
29 = lock temp & fan & clock & on/off
30 = lock temp & fan & clock &mode
31 = lock temp & fan & clock &mode & on/off = lock all keys
0
3
Power failure: 0- stay power off
1- restore last status before power failure
2- turn power on after power failure
1
4
Upper temperature limit: Range: +1..+50 °C / +34..99 °F 30 °C / 86 °F
5
Lower temperature limit: Range: +1..+50 °C / +34..99 °F 16 °C / 60 °F
6
LCD backlight delay: 10..150 seconds 20 seconds
7
Screensaver mode: 0- display off
1- room temperature
2- display clock, room temperature
3- display on
0
8
Time format: 12- 12 hours
24- 24 hours
12
9
Timer on / off: 0- once
1- loop
0
10
7 days, 4 periods programmable: 0- deactivated
1- activated
0
11
Display language: 1- English 1
12
Temperature format: 0- °C
1- °F
0
13
Selection Fan Coil: 2- 2-pipe Fan Coil, heating/cooling
4- 4-pipe Fan Coil, heating/cooling
6- 2-pipe Fan Coil cooling+electric-heater
2
14
Auto cooling & heating modus: 0- deactivated
1- activated
0
15
Fan modus: 0- deactivated
1- activated
1
16
Fan on/off selective 0-valve stop does chain fan，1-Valve stop chain fan 0
17
Temporarily not defined 0
18
Communication: ID.1.. ID.247 1
19
Baud rate: 1- 4800 bps; 2- 9600 bps; 3- 19200 bps; 4- 38400 bps 2
20
Parity 0-no parity 1-odd parity 2-even parity 0
21
Summer/winter time 0-fordibben 1-allow 1
22
Individual password setting 001-999 260
23
Stopbit 1=1bit, 2=2bit 2
24
Infrared receiver (remote) 0 – deactivated, 1 - activated 0
All parameters are stored within an EEPROM (electrically erasable programmable ROM), ensuring no data loss if the Thermostat
is powered off.

Issue date: 13.02.2018 Page 9 / 22
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Modbus functions and registers
The device supports the following functions and registers
Coil Register
Variable
Description
Read
/ Write
Unit
Options
Register
Function code
10001 working status Read -only NC 0=stop，1=run 0x0000 0x01
10002 failure status Read -only NC 0:Non，1:failure 0x0001 0x01
10003 VA1 status Read -only NC 0=stop，1=run 0x0002 0x01
10004 VA2 status Read -only NC 0=stop，1=run 0x0003 0x01
10005 electrical heating status Read -only NC 0=stop，1=run(this function under
cooling+electr-heater is available 0x0004 0x01
10006 low speed status Read -only NC 0=stop，1=run 0x0005 0x01
10007 Medium speed status Read -only NC 0=stop，1=run 0x0006 0x01
10008 high speed status Read -only NC 0=stop，1=run 0x0007 0x01
Input Register
Variable
Description
Read
/ Write
Unit
Options
Register
Function code
30001
return air temperature Read -only 0.1
℃
0-500(0x01F4), for example:245 and 24.5
℃
0x0000 0x04
30002
fan status Read -only NC 0=stop,2=low,4=medium,8=High 0x0001 0x04
30003
VA1 status Read -only NC 0=stop，1=run 0x0002 0x04
30004
VA2 status Read -only NC 0=stop，1=run 0x0003 0x04
30005
electrical heating status Read -only NC 0=stop，1=runThis function under
cooling+electr-heater is available
0x0004 0x04
30006
working status Read -only NC 0=stop，1=run 0x0005 0x04
30007
failure status Read -only NC 0:failure-free，
1:room temperature sensor alarm
0x0006 0x04
30008
fan coil type Read -only NC 2:cool&heat 2pipe,
4:cool&heat 4pipe,
6:cooling+electr-heater
0x0007 0x04
30009
version Read -only NC 1010(0x03F2)-9999(0x270F),for
example:1110(0x0456) and
communciation protocol version V1.3,
software version V1.7
0x0008 0x04
30010
External temp sensor Read-only NC 0-00-500(0x01F4),e,g:245=24.5
℃
0x0009 0x04

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Holding Register:
Variable
Description
Read
/ Write
Unit
Options
Register
Function code
40001
mode Read / Write NC 1=cool,4=fan,8=heat,16=auto 0x0000 0x000F
40002
fan speed Read / Write NC 2=low,4=medium,8=high,128=auto 0x0001 0x03,00x06,0x10
40003
set point temperature Read / Write 0.1
℃
1-500(0x01F4),for example:265 and 26.5
℃
0x0002 0x03,00x06,0x10
40004
on/off Read / Write NC 0=stop，1=run 0x0003 0x03,00x06,0x10
40005
temperature lower limit Read / Write 1
℃
1-50(0x0032)
default=16
℃
0x0004 0x03,00x06,0x10
40006
temperature upper limit Read / Write 1
℃
1-50(0x0032) default=30
℃
0x0005 0x03,00x06,0x10
40007
Power failure Read / Write NC 0-keep off power on，1-Memo while the
power failure, 2-switch on while power on
Default=0
0x0006 0x03,00x06,0x10
40008
Key-lock Read / Write NC see parameter table: binary notation
Temp=16=0x10
Fan=8=0x08
Clock=4=0x04
Mode=2=0x02
ON/OFF=1=0x01
0x0007 0x03,00x06,0x10
40009
Backlight delay Read/Write s 10-150s，default=15s 0x0008 0x03,00x06,0x10
40010
change over temperature
cooling (2-pipe + external
temp. sensor)
Read /Write 1
℃
12-24，default=19
℃
0x0009 0x03,00x06,0x10
40011
change over temperature
heating (2-pipe + external
temp. sensor)
Read /Write 1
℃
25-45，default=30
℃
0x000A 0x03,00x06,0x10
40012
Fan coil type Read /Write NC 2=cooling&heating 2-pipe 4=cooling&heating
4-pipe ,6=cooling+elec-heater,default=2
0x000B 0x03,00x06,0x10
40013
7day 4periods
programmable
Read /Write NC 0=forbidden,1=allowed ,default=0 0x000C 0x03,00x06,0x10
40014
time of the first
temperature zone
Read /Write NC hour:min,BCD code data format
e,g:08:30=0x0830
0x000D 0x03,00x06,0x10
40015
temperature setting of the
first temperature zone
Read /Write 1
℃
16-30，default=25
℃
0x000E 0x03,00x06,0x10
40016
time of the second
temperature zone
Read /Write NC hour:min, BCD code data format
e,g:14:00=0x1400
0x000F 0x03,00x06,0x10
40017
temperature setting of the
second temperature zone
Read /Write 1
℃
16-30，default=26
℃
0x0010 0x03,00x06,0x10
40018
time of the third
temperature zone
Read /Write NC hour:min,e,g:20:00=0x2000 0x0011 0x03,00x06,0x10
40019
temperature setting of the
third temperature zone
Read /Write 1
℃
16-30，default=27
℃
0x0012 0x03,00x06,0x10
40020
time of the fourth
temperature zone
Read /Write NC hour:min, BCD code data format
e,g:02:00=0x0200
0x0013 0x03,00x06,0x10
40021
temperature setting of the
fourth temperature zone
Read /Write 1
℃
16-30，default=28
℃
0x0014 0x03,00x06,0x10
40022
Individual passwords
setting
Read /Write NC 001-999，defaul=260 0x0015 0x03,00x06,0x10
40023
Summer/winter time Read /Write NC 0=forbidden,1=allowed ,default=1 0x0016 0x03,00x06,0x10
40024
system time-- year Read /Write NC 2000-2099，default=2015 0x0017 0x03,00x06,0x10
40025
system time--month Read /Write NC 01-12 0x0018 0x03,00x06,0x10
40026
system time--day Read /Write NC 01-31 0x0019 0x03,00x06,0x10
40027
system time-hour Read /Write NC 00-23 0x001A 0x03,00x06,0x10
40028
system time-minutes Read /Write NC 00-59 0x001B 0x03,00x06,0x10
40029
system time--seconds Read /Write NC 00-59 0x001C 0x03,00x06,0x10
40030
system week Read /Write NC 1=Sun ,2=Mon ,3=Tue ,4=Wed 5=Thu
6=Fri 7=Sat
0x001D 0x03,00x06,0x10
40031
IR receiver Read /Write NC 0=OFF, 1=ON 0x001E 0x03,00x06,0x11