Instructions for the installer
59
The fictitious ambient temperature is set
using +/- CH buttons that, with external
probe installed, no longer work to set the
heating water temperature (see Ope-
ration with external probe (optional) on
page
24
).
Through boiler parameter P30 it is pos-
sible to display the value of the outside
temperature detected by the external
probe.
With installed external probe, press +/-
CH buttons to set calculated ambient
temperature. As soon as the button is
released, icon
will continue flashing
for approx. 3 seconds, and the calcula-
ted ambient temperature value will flash
as well.
After this time, value is stored and display standard operation will be restored.
The figure shows the curves for a fictitious ambient temperature of 20°C.Parameter
P10 allows selecting the curve value shown (see
Fig. 24 Thermoregulation curves).
If fictitious ambient temperature value is edited on boiler display, the curves shift up or down, respectively, by the same amount.
With a fictitious ambient temperature setting of 20°C, for example, if you select the curve corresponding to parameter 1 and the outdo
-
or temperature is - 4°C, the CH flow temperature will be 50°C.
100
90
80
70
60
50
40
30
20
10
0
20
16
12
-12
-20
-28
-36
-40
3.0
2.0
1.5
1.0
0.8
0.6
0.4
0.2
2.5
8
4
0
-4
-8
-16
-24
-32
Te [°C]
Tm [°C]
Fig. 24 Thermoregulation curves
Tm
indicates flow water temperature in °C
Te
indicates external temperature in °C