MENU > Settings > Boiler
Reaction, in band (A375 applications)
1x075
The set time (in seconds) determines the burner cut-in / cut-out when the
boiler / flow temperature is inside the ‘Band limit’ ID no. 11048.
Three conditions must be met in order to cut-in / cut-out the next burner step:
•
the set time has elapsed after the latest burner cut-in / cut-out
•
the boiler / flow temperature is inside the band limit
•
the change in boiler / flow temperature has been less than 1 K / minute
(the temperature gradient is less than 1 K / minute)
See Appendix “Parameter ID overview”
5 ... 6000:
Set the desired time.
The illustration shows a typical situation where the actual boiler
/ flow temperature is relatively close to the desired boiler / flow
temperature, i.e. inside the band limit.
Temp.
Difference
Desired boiler / flow
temp.
Band limit
Actual boiler / flow
temp.
Time
Temp.
Actual boiler / flow
temp.
Band limit
Desired boiler / flow
temp.
Difference
Time
MENU > Settings > Boiler
Xp (proportional band)
1x184
See Appendix “Parameter ID overview”
Set the proportional band. A higher value will result in a stable but
slow control of the flow / duct temperature.
MENU > Settings > Boiler
Tn (integration time constant)
1x185
See Appendix “Parameter ID overview”
Set a high integration time constant (in seconds) to obtain a slow
but stable reaction to deviations.
A low integration time constant will make the controller react fast
but with less stability.
132 | © Danfoss | 2017.09
VI.GU.L2.02
Operating Guide ECL Comfort 210/296/310, application A275/A375
