MENU > Settings > Return limit
High limit Y2 (return temp. limitation, high limit, Y-axis)
1x034
Set the return temperature limitation referring to the outdoor temperature
value set in 'Low T out X2'.
See Appendix “Parameter ID overview”
The corresponding X coordinate is set in 'Low T out X2'.
MENU > Settings > Return limit
Infl. - max. (return temp. limitation - max. influence)
1x035
Determines how much the desired flow temperature will be influenced if the
return temperature is higher than the set limit.
See Appendix “Parameter ID overview”
Influence higher than 0:
The desired flow temperature is increased, when the return
temperature gets higher than the set limit.
Influence lower than 0:
The desired flow temperature is decreased, when the return
temperature gets higher than the set limit.
Example
The return limit is active above 50 °C.
The influence is set to 0.5.
The actual return temperature is 2 degrees too high.
Result:
The desired flow temperature is changed by 0.5 x 2 = 1.0 degree.
MENU > Settings > Return limit
Infl. - min. (return temp. limitation - min. influence)
1x036
Determines how much the desired flow temperature will be influenced if the
return temperature is lower than the calculated limit.
See Appendix “Parameter ID overview”
Influence higher than 0:
The desired flow temperature is increased, when the return
temperature gets below the calculated limit.
Influence lower than 0:
The desired flow temperature is decreased, when the return
temperature gets below the calculated limit.
Example
The return limit is active below 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 = -6.0 degrees.
Normally, this setting is 0 in district heating systems because a lower
return temperature is acceptable.
Typically, this setting is higher than 0 in boiler systems to avoid a too
low return temperature (see also 'Infl. - max.').
MENU > Settings > Return limit
Adapt. time (adaptation time)
1x037
Controls how fast the return temperature adapts to the desired return
temperature limit (Integration control).
See Appendix “Parameter ID overview”
OFF:
The control function is not influenced by the ‘Adapt.
time’.
Minor
value:
The desired temperature is adapted quickly.
Major
value:
The desired temperature is adapted slowly.
The adaptation function can correct the desired flow temperature
with max. 8 K.
VI.GU.L2.02
© Danfoss | 2017.09 | 119
Operating Guide ECL Comfort 210/296/310, application A275/A375
