15
Correct positioning of the temperature sensors is essential to proper indoor climate control.
b
To ensure correct functioning, use separate cable ducts for the power cables (230 Vac) and for the non-polarised
terminals.
SM
(flow temperature sensor)
Insert in the socket above the flow pipe outlet from
the boiler.
SB
(storage cylinder temperature sensor)
Insert in the top socket on the storage cylinder.
SR
(return temperature sensor)
Insert in the socket to be provided on the boiler return
pipe.
To measure effective water return temperature and to
control the temperature stabilisation function, the socket
for the return temperature sensor must be positioned
at a distance of 3 to 5 times the diameter of the water
return pipe upstream from any water fittings (condensate
prevention pump or recirculation pump). If the boiler
provides no socket for an immersion type sensor, use
the accessory external pipe sensor, to be ordered sepa-
rately.
D
3
÷
5 D
Correspondence table
FLOW TEMP. SENSOR – STORAGE CYLINDER TEMP. SENSOR – RETURN TEMP. SENSOR
(Available as accessories, to be ordered separately.)
Measured temperature (°C) – Resistance of temperature sensor (
Ω
).
T (°C)
R (
Ω
)
T (°C)
R (
Ω
)
T (°C)
R (
Ω
)
T (°C)
R (
Ω
)
-30
175203
30
8059
90
915
150
183
-25
129289
35
6535
95
786
155
163
-20
96360
40
5330
100
677
160
145
-15
72502
45
4372
105
586
165
130
-10
55047
50
3605
110
508
170
117
-5
42158
55
2989
115
443
175
105
0
32555
60
2490
120
387
180
95
5
25339
65
2084
125
339
185
85
10
19873
70
1753
130
298
190
77
15
15699
75
1481
135
262
195
70
20
12488
80
1256
140
232
200
64
25
10000
85
1070
145
206
Maximum permitted sensor cable lengths (copper)
Cable size
0,25 0,50 0,75
1,0
1,5
mm
2
Max. length
20
40
60
80
120
m
POSITIONING THE SENSORS