Danfoss ECL Comfort C25, User Manual

Page: 29 / 69

The grey
side of the
ECL Card
Basic set-up
8
4
1 2
ON ON
2
ON
3
ON
4 Boiler temperature difference
Circuit Setting range Factory setting
I OFF / 1 ... 50 K 8 K
OFF:
The boiler temperature difference is set
automatically according to the momentary
load of the boiler and the temperature
conditions in the heating system.
1 ... 50:
The boiler temperature difference is set
manually to a fixed value according to the
boiler manufacturer specification.
The burner is switched ON and OFF to maintain
the desired boiler temperature. The difference is
between the cut-in and cut-out temperature.
The boiler temperature difference is symmetrical around the
desired boiler temperature, i.e. half the value is above and half the
value is below this temperature.
Boiler control -
line 4
24