10 English
SYMBOLS FOR THE DISPLAY OF TEMPERATURES AND OTHER DATA
Symbol Description
The measured temperature value
Room temperature
Outdoor temperature
Temperature of the boiler or heat source
Temperature of the supply line
The temperature of the return line
T1, T2, T3, T4
TR
TA
TQ
Temperature value measured with sensors T1, T2, T3 and T4
Temperature value measured with a room sensor or room unit
Outdoor temperature, obtained through the BUS connection
Temperature of the heat source, obtained through the BUS connec-
tion
SYMBOLS OF PROTECTION FUNCTIONS
Symbol Description
Protection of the heat source against overheating
Protection against freezing due to low room temperature
Protection against freezing due to low outdoor temperature
SYMBOLS FOR THE DISPLAY OF COMMUNICATION BETWEEN
INTERCONNECTED DEVICES
Symbol Description
Devices, connected to the COM communication line
Room unit is connected. The number of the room unit indicates
whether it is the rst or the second room unit.
Controller status of the BUS connection
First controller of the BUS connection
Interim controller of the BUS connection
Last controller of the BUS connection
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