Carel thTx Manual Del Usuario página 23

1: The fan operates in cooling mode but is not visible in heating
mode
Mode Icon shown
2: The fan operates in heating mode but is not visible in cooling
mode
Mode Icon shown
3: The fan is not visible in either heating or cooling mode, but the
fan mode is selectable
Mode Icon shown
4: Heating and cooling modes only available (fan mode not visible)
Mode Icon shown
Furthermore, by changing the value of variable COIL 59, MODE setting
managed via Modbus RS485, icon 3 will be shown in the top left of the
screen:
1 3
2 4
Cool On Heat On
SET
Now set HR140 (S_MODE) to completely overwrite the MODE; setting the
register to specifi c values will display the corresponding icon:
0x03: Cool ( );
0x04: Heat ( );
0x05: Ventilation ( );
Ventilation ramp
YES NO
YES YES
YES YES
Ventilation ramp
YES YES
YES NO
YES YES
Ventilation ramp
YES NO
YES NO
YES YES
Ventilation ramp
YES NO
YES NO
NO NO
°F °C
%
Fig. 2.c
0x255: NO ACTIONS (all icons cleared); this setting allows the thTx to be
used as a room probe only.
1 3
2 4
SET
Setting variable COIL 60, "Fan - button selection" managed via Modbus
RS485, icon 4 will be shown in the top left of the screen:
Now set HR141 (S_FAN) to completely overwrite the fan speed; setting
the register to specifi c values will display the corresponding icon:
0: all OFF ( );
1: Fan_Speed1 ( );
2: Fan_Speed1 + Speed2 (
3: Fan_Speed1 + Speed2 + Speed3 (
255: Fan_Speed1 + Speed2 + Speed3 + Auto (
Notice: when the fan logic is managed independently by the thTx
and the fan is set to AUTO, the device has two diff erentiated functions,
depending on whether it is in cooling or heating mode.
Cooling mode
1. When the room temperature is ≥
the set temperature +1°C, the fan
operates at low speed;
2. When the room temperature is
≥ the set temperature +2°C, the fan
operates at medium speed;
3. When the room temperature is ≥
the set temperature +3°C, the fan
operates at high speed;
4. When the room temperature ≤ the
set temperature, the relay opens and
the fan stops.
Notice: in ventilation mode, the fan speed has no relation to the set
temperature.
Relay management
By setting variable COIL 51 , "Relay management confi guration" via
Modbus RS485, icon 2 will be shown in the top left of the screen:
Depending on the confi guration set via coil 70 (or menu parameter E28)
Management of relay outputs (0: Temperature = Temperature control 1:
Humidity = Humidity control) and the MODE activated (HR140), the status
of the relay can be controlled via COIL 52.
11
Cool On Heat On
°F °C
%
Fig. 2.d
);
);
Heating mode
1. When the room temperature is
≤ the set temperature -1°C, the fan
operates at low speed;
2. When the room temperature ≤ the
set temperature -2°C, the fan operates
at medium speed;
3. When the room temperature is
≤ the set temperature -3°C, the fan
operates at high speed;
4. When the room temperature is ≥
the set temperature, the relay opens
and the fan stops.
"manuale thTx" +0300141IE rel. 1.0 - 16.01.2024
ENG
).
Tab. 2.b