Danfoss ECL Comfort C25, User Manual

Page: 47 / 69

The grey
side of the
ECL Card
Ex
tended ser
vic
e
Service parameter(s) 36
32i
36 Return temperature influence - min. limitation
Circuit Setting range Factory setting
I -9.9 ... 0 ... 9.9 2.0
Set the influence from the return temperature on the desired flow
temperature.
Set the influence of the min. return temperature
limitation (set in line 30 or lines 31-34).
Influence higher than 0:
The desired flow temperature is increased, when
the return temperature gets below the set limit.
Influence lower than 0:
The desired flow temperature is decreased, when
the return temperature gets below the set limit.
0
Influence
Min. limitation > 0
Return limit Return temp.
Min. limitation < 0
Example
The return limit is active up to 50 °C.
The influence is set to -3.0.
The actual return temperature is 2 degrees too low.
Result:
The desired flow temperature is changed by -3.0 x 2 = -6 degrees.
Normally, the setting in line 36 is 0 in district heating systems
because a lower return temperature is acceptable.
Typically, the setting in line 36 is higher than 0 in boiler systems to
avoid a too low return temperature (see also line 35).