Carel thTx Mode D'emploi page 19

2.1 Display and touch buttons
3 4
1
1 3
2 4
Cool On Heat On
5
10
SET
13
14
1 Humidify logic activated
3 Manual logic via RS485 active (mode)
4 Manual logic via RS485 active (fan)
5 Indoor temperature
8 Display lock activated
10 Temperature
11 Temperature unit of measure
12 Relative humidity
13 Temperature setting
14 Fan speed in manual/automatic mode
15 Operating mode: Ventilation
16 Operating mode: Heating
17 Operating mode: Cooling
Functions of the buttons
Button Description Function
Flashing Press and hold for a few seconds to switch the
ON/OFF terminal on or off. When off, all the outputs will be
open.
Fan/Confirm When the terminal is on, press this button to set the
fan speed to Low
speed Off
Inside the menus or when changing the SET point,
this becomes the "confirm" button
Arrow When the terminal is on, touch the Up or Down
Up/Down button to increase or decrease the set temperature,
with 0.5 degree increments.
After setting, press Fan/Confirm to save the new
temperature or wait 8 seconds without touching any
button to save the value automatically.
When the terminal is in normal operation, pressing
the two buttons together for 3 seconds locks the
display, with the padlock icon shown.
Pressing the two buttons together again unlocks the
display and the padlock icon is cleared.
MODE Select the operating mode: press until reaching the
desired operating mode, between Cooling/Heating/
Fan-only
The parameters can be set on the terminal in two possible ways: either
directly on the display (using the buttons and parameters shown in Table
3.b) or via Modbus, setting the parameters shown in Table 3.c.
2. USING THE TERMINAL
11 8
°F °C
%
15
Fig. 2.a
Medium High Automatic fan
Tab. 2.a
2.2 RS485 address setting
Select parameter E5 (communication address) to set and confirm the
thermostat's RS485 serial address.
Up to 32 terminals can be connected. The serial address must be in the
range 1 to 207 (default address = 1).
This parameter can be set via Modbus variable HR 249.
Notice: the settings via Modbus do not require a reboot and take
effect immediately.
12
Communication modes
16
Protocol type: RTU
17
Data bits: 8
Stop bits: 2
Parity: None
Settable via menu E25 (stop bits) E26 (parity) or via Modbus variables
HR340 and HR 341 respectively.
Notice: the settings via Modbus do not require a reboot and take
effect immediately.
BMS data transmission speed
Access menu parameter E24 (baud rate) and confirm the value:
• 0= 19200 (default)
• 1= 9600
• 2= 4800
This parameter can be set via Modbus variable HR 250.
Notice: the settings via Modbus do not require a reboot and take
effect immediately.
2.3 Using the terminal
Setting the parameters
To access the
the terminal off using the ON/OFF button, press and hold
" + " for 5 seconds, then enter the password (0022).
Subsequently, the password can be changed using menu parameter E23.
The complete list of parameters is shown in Table 3.b
Setting the mode
To set the operating mode, press the Mode button, the icon at the bottom
left will change to Heating (sun) / Cooling (snowflake) / Ventilation (fan).
The mode can also be viewed via Modbus parameter HR140
SET/FAN button
The button is used to change the fan speed of the three-speed fan.
It is also used to confirm the settings (set point and in the settings menu).
Pressing also selects the desired speed (low, med, high) or automatic
(Auto), with the same setting sent via Modbus (register 141)
9
menu for setting the parameters,
"thTx" +030220865 rel. 1.0 - 11.03.2024
ENG
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