5.2 Flow temperature
The ECL Comfort controller determines and controls the flow
temperature related to the outdoor temperature. This relationship
is called the heat curve.
The heat curve is set by means of 6 coordinate points. The desired
flow temperature is set at 6 pre-defined outdoor temperature
values.
The shown value for the heat curve is an average value (slope),
based on the actual settings.
Outdoor
temp.
Desired flow temp.
Your
settings
A
B
C
-30 °C
45 °C
75 °C
95 °C
-15 °C
40 °C
60 °C
90 °C
-5 °C
35 °C
50 °C
80 °C
0 °C
32 °C
45 °C
70 °C
5 °C
30 °C
40 °C
60 °C
15 °C
25 °C
28 °C
35 °C
A:
Example for floor heating
B: Factory settings
C:
Example for radiator heating (high demand)
MENU > Settings > Flow temperature
Heat curve
1
0.1 ... 4.0
1.0
The heat curve can be changed in two ways:
1.
The value of the slope is changed (see heat curve examples
on next page)
2.
The coordinates of the heat curve are changed
Change the value of the slope:
Push the dial to enter / change the slope value of the heat curve
(example: 1.0).
When the slope of the heat curve is changed by means of the slope
value, the common point for all heat curves will be a desired flow
temperature = 24.6 °C at an outdoor temperature = 20 °C and a
desired room temperature = 20.0 °C.
Change the coordinates:
Push the dial to enter / change the coordinates of the heat curve
(example: -30,75).
The heat curve represents the desired flow temperatures at
different outdoor temperatures and at a desired room temperature
of 20 °C.
If the desired room temperature is changed, the desired flow
temperature also changes:
(Desired room T - 20) × HC × 2.5
where "HC" is the Heat Curve slope and "2.5" is a constant.
Desired flow temperature
Slope changes
Coordinate changes
The calculated flow temperature can be influenced by the ‘Boost’ and
‘Ramp’ functions etc.
Example:
Heat curve:
Desired flow temp.:
Desired room temp.:
Calculation (22–20) × 1.0 × 2.5 =
1.0
50 °C
22 °C
5
Result:
The desired flow temperature will be corrected from 50 °C to 55 °C.
74 | © Danfoss | 2017.09
VI.GU.T2.02
Operating Guide ECL Comfort 310, application A333
