MENU > Settings > Boiler
Protection
1x047
Choose whether the circulation pump for the boiler circuit (P1) should be
stopped to prevent condensation in the boiler during the heating-up period.
See Appendix “Parameter ID overview”
OFF
:
The circulation pump is controlled according to
demand.
The circulation pump is switched ON when:
·
the desired flow (boiler) temperature is higher
than the set value in ID no. 11078 ‘P heat T’ or
·
the outdoor temperature is lower than the set
value in ID no. 11077 ‘P frost T’.
ON:
The circulation pump is switched OFF until the desired
min. flow (boiler) temperature is reached.
The min. flow (boiler) temperature is set in ID no.
11177 ‘Temp. min.’.
Typically, the heating-up period of an oil fired boiler must be as short
as possible. This will reduce condensation in the furnace.
To obtain the best conditions for the boiler, the circulation pump (P1)
can be switched OFF during the heating-up period.
The circulation pump will be switched ON when the actual flow
(boiler) temperature is higher than the min. desired flow (boiler)
temperature set in ID no. 11177 ‘Temp. min.’ + half the boiler
temperature difference in ID no. 11046 ‘Difference’.
The circulation pump will be switched OFF again if the actual flow
(boiler) temperature is lower than the min. desired flow (boiler)
temperature set in ID no. 11177 ‘Temp. min.’.
Example:
‘Temp. min.’= 45 °C and ‘Difference’ = 8 K
The circulation pump will be switched ON when the actual flow
(boiler) temperature is higher than 45 + 0.5 x 8 = 49 °C.
The circulation pump will be switched OFF when the flow (boiler)
temperature gets lower than 45 °C.
Flow (boiler) temp.
0.5 x ‘Difference’
Boiler temperature
Time
MENU > Settings > Boiler
Band limit (A375 applications)
1x048
The band limit determines when burners are cut-in and cut-out if there is
a temperature difference between the desired and the actual flow (boiler)
temperature.
If the difference is more than the set value, the setting in ID 11074 ‘Reaction,
o. band’ determines the control of burner steps. If the difference is less than
the set value, the setting in ID no. 11075 ‘Reaction in band’ determines the
control of burner steps.
See Appendix “Parameter ID overview”
5 ... 80 K:
Set the band limit.
Temp.
Band limit
Desired boiler / flow
temp.
Band limit
Time
128 | © Danfoss | 2017.09
VI.GU.L2.02
Operating Guide ECL Comfort 210/296/310, application A275/A375