Low pressure regulator Type NDR 0515 and Type NDR 0516
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Fault cause
Action
No gas flow
Gas feed is closed:
open the gas cylinder valve or the shut-off fittings
Safety overpressure shut-off valve (OPSO / UPSO) is closed:
carry out the steps described in "Restarting the safety
overpressure shut-off valve (OPSO / UPSO)"
Filter sieve in the input connection is dirty:
send the pressure regulator to the manufacturer to be
checked
The thermal cut-out device has responded.
Replace the pressure regulator.
OPSO cannot be unlocked
Regulator membrane is damaged:
Pressure regulator is defective, replace.
Restarting the safety overpressure shut-off valve OPSO with visual indicator
If the safety overpressure shut-off valve OPSO has responded, which is shown in
RED
on
the visual indicator - take the following steps.
1. Close the gas withdrawal valve.
2. Vent the pressure regulator
loosen the screw connection on the outlet side .
3. Ventilate the inlet pressure
Loosen the connection on the inlet side .
4. Tighten all connections again.
5. After elimination of defects, open the gas cylinder valve or the shut-off fittings.
6. Unscrew the protective cap by hand.
7. Turn the protective cap around and pull out the spindle with the release device
until the spindle clicks into place and remains open.
8. Screw the protective cap on again by hand.
9.
OPSO
is ready to operate
and the display is
GREEN
.
10. Check for leaks.