2/3.5.3 Hot Water Boiler Safety Valve T2-14 - WMF 800 Manual

Engineering
2/3.5.2 Thermostat
Technical data: thermostat
Shut-off temperature
Technician instructions
After cooling down, the contact can be closed again by pressing the reset button.
The temperature limiter may be screwed in with a maximum of 100 Ncm (proper
hand-tightening).
If you tighten the temperature limiter more, you will strip the threads. The sensor
would then not make contact correctly and as a consequence it no longer trips due
to an overtemperature condition!
If there is mechanical damage or evidence of corrosion, the temperature sensor must
be replaced for safety reasons.
Possible errors
• Tripping of the temperature limiter can be traced to faults listed in the hot water
boiler chapter
2/3.5.3 Hot water boiler safety valve
Technical data: safety valve
Opening pressure 16 bar (1.6 MPa)
Service life: safety valve
2 years
T2-14
The temperature limiters prevent the
boiler temperature from increasing too
much in the case of a malfunction. If
the cut-off temperature is exceeded,
the contacts open and are locked.
If there is a leak, the protective covers
prevent short-circuits.
The service technician is protected
from accidental contact and possible
electrocution.
+130 °C ± 6.5 K corresponds to about
3 - 3 .5 bar
The safety valve prevents an
unallowed increase in pressure in the
boiler due to faults.
After 2 years, the safety valve must be replaced for
safety reasons
See hot water boiler in chapter 2/3.5.4.2
© WMF 800 / 900 / 1000 S / 1000 pro S Edition 07/2014 - KMT