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P100015830 B
TRA 410, 421
Description of operation
8.2 Description of parameters for TRA 421
Symbol
Procedure
Changing parameters:
Select the “Parameters” menu by pressing and turning twice to the
right.
The “Code” symbol flashes.
Press to confirm the selection.
Enter the four-digit service code by turning and pressing.
Factory setting: 1234
Press to confirm the entry.
The
symbol is displayed.
Press to confirm the entry.
The individual digits of the parameter number are entered by turn-
ing and pressing.
Press to confirm the entry.
Preset control algorithms for the following applications:
Factory setting: 0
0 = standard underfloor heating
1 = low-energy underfloor heating
2 = radiator
3 = passive convector (slow warm-up period)
4 = fan convector (fast warm-up period)
Activating/deactivating cooling lock
Factory setting: 0
0 = deactivated
1 = activated
Note: When the cooling lock is activated and the operating mode is
set to cooling, the heating mode is also inactive.
Protects the locking of the operation with a code:
Factory setting: 0
0 = deactivated
1 = activated
Note: The locking must be activated in the “Operating modes”
menu.
Change the code for locking operation.
Factory setting: 0000
Activating an external sensor.
Factory setting: 0
0 = internal sensor is operating
1 = external sensor is operating; internal sensor is deactivated
2 = input for external floor sensor is activated
Note: This is a comfort temperature. As soon as the floor temper-
ature has been reached, the internal sensor takes over controlling
the room. Set the setpoint temperature of the external sensor in
the “Settings” menu
Setting/correcting the floor temperature.
Factory setting: 0 °C
A difference in the actual floor temperature can be corrected.
Setting range -2 °C to +2 °C.
Set the duration of the backlight of the display.
Factory setting: 15 seconds
Determines the time period for which the display is illuminated after
operation.
Setting range: 0 to 30 seconds (in 5-second steps).
