Temperature Probe; Function; Checks; Removal Of The C.h. Temperature Probe - Biasi Riva Plus HE M296.24SR/C Service Manual

12

temperature prObe

12 .1 function

The Temperature probe has the function of converting the tem-
perature of the water in the hydraulic circuit where it is installed
into an electrical signal (resistance).
The relation between temperature and electrical resistance is
stated in Figure 12.1.
12500
12000
11500
11000
10500
10000
9500
9000
8500
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
figure 12 .1
On the boiler there is one Temperature probe on the output of
the primary heat exchanger (c.h. temperature probe) A in Figure
12.2 and Figure 12.3.
figure 12 .2
- 28 -
TemperaTure probe
a
c.h. c.h.
return flow

12 .2 checks

Sensor operation
warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
Disconnect the cable from the Temperature probe.
Measure the temperature of the pipe B where the Temper-
ature probe is located and check the electrical resistance
according to the graph in Figure 12.1.
12 .3 removal of the c .h . temperature probe
warning: isolate the boiler from the mains electrici-
ty supply before removing any covering or compo-
nent .
1 Remove all the case panels and the sealed chamber lid.
°C
figure 12 .3
2 Remove the electric connector C and remove the c.h. tem-
perature probe A (Figure 12.3).
3 Reassemble the c.h. temperature probe carrying out the re-
moval operations in reverse order.
a
c
b