Nominal Resistances Of The Temperature Sensors - oventrop Regumaq X-45 Operating Instructions Manual

Regumaq X-45
Troubleshooting
MALFUNCTION
Water leakage or leaks at the heat
exchanger (external).
Pressure increase in the storage
cylinder circuit (potable water en-
ters the storage cylinder circuit).
The safety valve in the storage cyl-
inder circuit may be triggered.
The discharge capacity at the
draw-off points is too low.
9.2

Nominal resistances of the temperature sensors

°C
-10
-5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
110
115
48
CAUSE
Leakage at the heat exchanger due to
corrosion. This can be the result of a
heat exchanger that is unsuitable for
the potable water quality.
The heat exchanger is heavily calci-
fied.
The cold water pressure is too low
(the pressure reducer is set incorrect-
ly).
Ω
PT 1000
961
980
1000
1019
1039
1058
1078
1097
1117
1136
1155
1175
1194
1213
1232
1252
1271
1290
1309
1328
1347
1366
1385
1404
1423
1442
REMEDY
Replace the heat exchanger. Match the new
heat exchanger to the potable water quality
(see Oventrop information sheet on corro-
sion protection in the appendix).
Decalcify the potable water side of the heat
exchanger.
Check the setting of the pressure reducer.
Increase the pressure if necessary.
138114082-V04.04.2022