MINI ULTRA ELECTRIC BOILERS Installation and operating manual (Revision: May 2015)
21
Boiler safety valve is
leaking
-Pressure reading at the indicator
shows a pressure above 28 psi.
-Pressure is below 28 psi
-The pressure regulator on the distribution
system is defective or the expansion tank is
too small or defective.
-Replace the safety valve
Table 4: Sensors resistance value vs real temperature.
Température Résistance Température Résistance Température Résistance Température Résistance
°F
°C
Ω
°F
°C
Ω
°F
°C
Ω
°F
°C
Ω
-50
-46
490,813
20
-7
46,218
90
32
7,334
160
71
1,689
-45
-43
405,71
25
-4
39,913
95
35
6,532
165
74
1,538
-40
-40
336,606
30
-1
34,558
100
38
5,826
170
77
1,403
-35
-37
280,279
35
2
29,996
105
41
5,21
175
79
1,281
-30
-34
234,196
40
4
26,099
110
43
4,665
180
82
1,172
-25
-32
196,358
45
7
22,763
115
46
4,184
185
85
1,073
-20
-29
165,18
50
10
19,9
120
49
3,76
190
88
983
-15
-26
139,402
55
13
17,436
125
52
3,383
195
91
903
-10
-23
118,018
60
16
15,311
130
54
3,05
200
93
829
-5
-21
100,221
65
18
13,474
135
57
2,754
205
96
763
0
-18
85,362
70
21
11,883
140
60
2,49
210
99
703
5
-15
72,918
75
24
10,501
145
63
2,255
215
102
648
10
-12
62,465
80
27
9,299
150
66
2,045
220
104
598
15
-9
53,658
85
29
8,25
155
68
1,857
225
107
553
