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Verfügbare Sprachen
INsTALLATIoN
Maintenance
7.
Maintenance
For later maintenance work on the installation, you can shut off
the supply line to the safety assembly.
Depending on the position of the safety valve, you may need to
drain the floor mounted cylinder before any maintenance work.
Seat and gasket of the diaphragm safety valve can be cleaned
without changing the response pressure.
7.1.1 Checking, cleaning and replacing the safety valve
f Check the safety valve every six months.
f Ensure that a suitable collection container is available, as
water will escape when the safety valve is vented. Turn the
vent cap two or three times anti-clockwise.
During heat-up, expansion water must drip into the tundish.
f Check the function of the non-return valve if no water
emerges.
Water should no longer drip out once heat-up is complete.
f If water continues to escape after heat-up, check the safety
valve for dirt. Once you have unscrewed the upper section,
you can clean the seat and gasket of the safety valve without
changing the response pressure. A damp cloth is sufficient
for this. Never use abrasive or corrosive cleaning agents.
f Check the supply pressure. If 0.5 MPa is exceeded, insert a
pressure reducing valve.
f If necessary, check the function of the pressure reducing
valve.
If a repair is required, you can replace the complete safety valve.
7.1.2 Cleaning the pressure reducing valve
f Slacken off the union nut on the spring cap.
f Remove the pressure reducing valve with the spring cap from
the casing.
f Clean the pressure reducing valve with clear, cold water.
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7.1.3 Checking the non-return valve
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1 Service valve for non-return valve (2nd shut-off valve)
2 Shut-off valve
3 Pressure gauge connection
4 Service plug for non-return valve
5 Non-return valve
f Check the non-return valve annually.
f Close the shut-off valve using the handwheel.
f Unscrew and remove the service plug for the non-return
valve.
If water continues to be discharged, the non-return valve is leak-
ing:
f Close the second shut-off valve.
f Replace the non-return valve.
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