Biasi RIVA ADVANCE HE M110.24SM/C Service Manual page 45

22 External temperature probe
(optional)
22.1
Function
The External temperature probe if fitted, allows to ad-
just automatically the temperature of the c.h. flow with
reference to the external temperature.
The relationship between the external temperature and
the c.h. flow temperature is represented by the coeffi-
cient K (Fig. 22.1) that can be set between 0 and 6.
More details concerning the coefficient K and the set-
ting procedure are given in the Commissioning section
of the installation manual.
The coefficient K is factory set to 0 that is the setting
for the operation with no external temperature
probe fitted.
C.h. flow temperature ûC
K=6
K=4 K=3
80
70
60
50
40
30
20
20 15 10 5
Fig. 22.1
K=2
K=1,5
K=1
K=0,5
0 ---5 ---10 ---15 ---20 ---25
External temperature ûC
22.2
Checks
Warning: isolate the boiler from the mains
electricity supply before removing any
covering or component.
Disconnect the cable from the External temperature
probe.
Measure the external temperature where the External
temperature probe is located and check the electrical
resistance according to the graph in Fig. 22.2.
Ω
12500
12000
11500
11000
10500
10000
9500
9000
8500
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Fig. 22.2
ûC
43