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Correspondence table for all sensors
Measured temperatures (°C) - Resistive values of the sensors (Ω).
T (°C)
R (°Ω)
- 20
67739
- 19
64571
- 18
61568
- 17
58719
- 16
56016
- 15
53452
16
- 14
51018
- 13
48707
- 12
46513
- 11
44429
- 10
42449
- 9
40568
- 8
38780
- 7
37079
- 6
35463
- 5
33925
- 4
32461
- 3
31069
- 2
29743
6 .2 .6 Frost protection
The heating unit electronic control includes a frost
protection function. When the flow temperature sinks
to below a minimum value, the burners start working at
minimum power according to the procedure used to set
the functional parameters.
The frost protection mode is activated even if the external
probe (supplied with the appliance) is not connected to the
boiler: parameters 14 (related to the Ch1 high temperature
system) and 22 (Ch2 low temperature system) are in fact in
default and set in weather function.
Should one not want to connect the probe, the boiler must
be made to work at a fixed point to avoid problems. The
parameter 14 and 22 settings may only be altered by a
Technical Assistance Centre authorized by
T (°C)
T (°C)
R (°Ω)
R (°Ω)
- 1
28481
18
13062
0
27279
19
12565
1
26135
20
12090
2
25044
21
11634
3
24004
22
11199
4
23014
23
10781
5
22069
24
10382
6
21168
25
9999
7
20309
26
9633
8
19489
27
9281
9
18706
28
8945
10
17959
29
8622
11
17245
30
8313
12
16563
31
8016
13
15912
32
7731
14
15289
33
7458
15
14694
34
7196
16
14126
35
6944
17
13582
36
6702
B
Initials
S1
SB
S2
SE
T2
T2
AI
CR
AL
VM
P4
P1
P2
Figure 15
T (°C)
T (°C)
R (°Ω)
37
6470
56
38
6247
57
39
6033
58
40
5828
59
41
5630
60
42
5440
61
43
5258
62
44
5082
63
45
4913
64
46
4751
65
47
4595
66
48
4444
67
49
4300
68
50
4161
69
51
4026
70
52
3897
71
53
3773
72
54
3653
73
55
3538
74
b
Power and fuel gas supply must be activated and
the water system at a correct pressure for the frost
protection system to function.
Glycol can be used as an additive for the system (up to a
maximum of 50%) there where considered necessary by
the person responsible for the project, keeping in mind that
this substantially reduces efficiency as it alters the specific
heat of the fluid.
Furthermore several parts of the system could be damaged
by altering the pH.
.
Jumper N.
Description
Flow temp. probe
J11 (1-2)
Water tank temp.
J11 (3-4)
Probe
Flow temp. probe
J11 (5-6)
J11 (7-8)
External temp. Probe
Room thermostat
J12 (9-10)
Room thermostat
J12 (11-12)
0-10V analogic
J12 (13-14)
device
J12 (15-17)
Remote control
J8 (18-19)
Alarm signal
J9 (20-22)
Mixer valve
J10 (23-24)
LT system circulator
J10 (25-26)
HT system circulator
J10 (27-28)
Hot water circulator
T (°C)
T (°C)
R (°Ω)
R (°Ω)
3426
75
1925
3319
76
1870
3216
77
1817
3116
78
1766
3021
79
1717
2928
80
1669
2839
81
1622
2753
82
1577
2669
83
1534
2589
84
1491
2512
85
1451
2437
86
1411
2365
87
1373
2296
88
1336
2229
89
1300
2164
90
1266
2101
91
1232
2040
92
1199
1982
93
1168
(HT)
(LT)
(HT)
(LT)
R (°Ω)
94
1137
95
1108
96
1079
97
1051
98
1024
99
998
100
973
101
948
102
925
103
901
104
879
105
857
106
836
107
815
108
796
109
776
110
757
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