30
High limit safety cut-out
■ Factory-set to 100 °C
■ Electromechanical temperature
switch according to the liquid expan-
sion principle with lockout
■ Intrinsically safe; also lockout in case
of capillary tube leaks or ambient tem-
peratures below
−
10 ºC
■ Limits the boiler water temperature to
the maximum permissible value by
shutdown and lockout
■ Central fixing M10, capillary 1000 mm
long; sensor
7
6.5 mm, 65 mm long
■ Electrical test in accordance with VDE
0701 [or local regulations]
Boiler, buffer, cylinder sensor
Connection
See chapter "Connection and wiring dia-
gram", page 42.
Checking sensors
Temperature in °C
0
100
200
300
400
500
0.75
1.25
1.75
2.25
2.75
3.25
Resistance in k
Ω
1.
Pull corresponding plug.
2.
Check the sensor resistance at the
plug.
3.
Compare the result with the actual
temperature (for scanning, see chap-
ter "Diagnosis").
In the case of severe deviation, check
the installation and replace the sen-
sor if required.
Troubleshooting
Repair
(cont.)
5604 447 GB
