Potterton eurocondense four 125 kw Installation, Operation And Maintanance Manual page 87

Fig.29 Heating curve diagram
°C
100
90
80
70
60
50
40
30
20
AT Outdoor temperature
7636047 - 02 - 24082015
4
10 0
Determination of the heating curve gradient
Enter the lowest calculated outside temperature according to climate zone
(e.g. -12°C in Frankfurt) into the diagram (see Figure 1, page 87) (e.g. ver­
tical line at -12°C). Enter the maximum flow temperature of the heating cir­
cuit, at which a room temperature of 20 °C is still calculated to be reached
at -12 °C outside temperature (e.g. horizontal line at 60 °C).
The intersection of both lines provides the value for the heating curve
slope.
Heating curve displacement (721, 1021, 1321)
Heating curve correction by parallel offset if the room temperature is gen­
erally too high or too low.
Heating curve adaption (726, 1026, 1326)
Automatic adaptation of the heating curve to the actual conditions, as a re­
sult of which no correction of the heating curve slope is required.
Note
Automatic adaptation of the heating curve requires the connection
of a room sensor. The value for room influence (see prog. no. 750,
1050, 1350) must be set between 1% and 99%. Should there be
radiator valves in the lead room (where the room sensor is instal­
led), these must be fully opened.
Summer/winter heating limit (730, 1030, 1330)
3,5 3 2,75 2,5
-10 -20
AT
VT Flow temperature
9 Settings
2,25
2
1,75
1,5
1,25
1
0,76
0,5
0,25
-30 °C
RA-sRE036B
87