The grey
side of the
ECL Card
Extended service
31  Return temperature limitation - upper limit (X-axis) 
Circuit Setting range Factory setting
(I) / (II) -60 ... 20 °C (15) / (15) °C
Set the outdoor temperature value (see drawing).
Set the outdoor temperature value (X coordinate) 
for the upper limit.
(The corresponding Y coordinate is set in line 32).
32  Return temperature limitation - upper limit (Y-axis) 
Circuit Setting range Factory setting
(I) / (II) 10 ... 110 °C (40) / (40) °C
Set the return temperature limitation referring to the outdoor 
temperature value set in line 31 (see drawing).
Set the return temperature (Y coordinate) for the 
upper limit.
(The corresponding X coordinate is set in line 31).
33  Return temperature limitation - lower limit (X-axis) 
Circuit Setting range Factory setting
(I) / (II) -60 ... 20 °C (15) / (15) °C
Set the outdoor temperature value (see drawing).
Set the outdoor temperature value (X coordinate) 
for the lower limit.
(The corresponding Y coordinate is set in line 34).
34  Return temperature limitation - lower limit (Y-axis) 
Circuit Setting range Factory setting
(I) / (II) 10 ... 110 °C (60) / (60) °C
Set the return temperature limitation (see drawing).
Set the return temperature (Y coordinate) for the 
lower limit.
(The corresponding X coordinate is set in line 33).  
Service parameter(s) 31-34
32h