Danfoss ECL Comfort 296 Operating Manual page 75

Operating Guide ECL Comfort 210/296/310, application A230
MENU > Settings > Return limit
Low T out X2 (return temp. limitation, low limit, X-axis)
Set the outdoor temperature value for the high return temperature
limitation.
See Appendix "Parameter ID overview"
The corresponding Y coordinate is set in 'High limit Y2' .
MENU > Settings > Return limit
High limit Y2 (return temp. limitation, high limit, Y-axis)
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)
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.
MENU > Settings > Return limit
Infl. - min. (return temp. limitation - min. influence)
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.
VI.LG.H4.02
1x033
1x034
Example
The return limit is active above 50 °C.
1x035
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.
Example
The return limit is active below 50 °C.
1x036
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.').
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