Danfoss ECL Comfort 210 Installation Manual page 116

Installation Guide
Protection
Circuit
1
Choose whether the circulation pump for the boiler circuit (P1) should be
stopped to prevent condensation in the boiler during the heating-up period.
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.
Band limit (A375 applications)
Circuit
1
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.
5 ... 80 K: Set the band limit.
116 DEN-SMT/DK
ECL Comfort 210 / 310, application A275 / A375
11047
Setting range Factory setting
OFF / ON OFF
11048
Setting range Factory setting
5 ... 80 K 20 K
Flow (boiler) temp.
Temp.
VI.GU.L1.02
0.5 x 'Difference'
Boiler temperature
Time
Band limit
Desired boiler / flow
temp.
Band limit
Time
Danfoss District Energy