Danfoss ECL Comfort 310 Operating Manual page 77

Operating Guide ECL Comfort 310, application A377
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.
MENU > Settings > Return limit
Adapt. time (adaptation time)
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 The desired temperature is adapted quickly.
value:
Major
The desired temperature is adapted slowly.
value:
MENU > Settings > Return limit
Priority (priority for return temp. limitation)
Choose whether the return temperature limitation should overrule the set
min. flow temperature 'Temp. min.' .
See Appendix "Parameter ID overview"
OFF: The min. flow temperature limit is not overruled.
ON:
The min. flow temperature limit is overruled.
VI.GU.F6.02
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.').
1x037
The adaptation function can correct the desired flow temperature
with max. 8 K.
1x085
If you have a DHW application:
Please also see 'Parallel operation' (ID 11043).
If you have a DHW application:
When dependent parallel operation is in function:
• Desired flow temperature for the heating circuit will be minimum
limited, when "Priority for return temperature" (ID 1x085) is set
to OFF.
• Desired flow temperature for the heating circuit will not be
minimum limited, when "Priority for return temperature"
(ID 1x085) is set to ON.
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