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Operations:
a –Pressure switch miscalibrated
b – Pressure switch faulty (with contacts closed)
Operation a:
Adjusting the pressure switch through the top hole of the dividing plate of the
steam boiler (see fig.43).
fig.43
Operation b:
– Replace the pressure switch (see fig.44)
fig.44
Operation:
- Calibrating the safety valve.
To calibrate the safety valve, proceed as follows:
- Loosen the lock nut (5) fig.45 up to the hexagon base of
the valve.
- Screw to lock the top part (4) of the valve by a few turns.
- Screw the valve of the pressure switch (see fig.43) to
increase pressure in the boiler up to 2 Bar while checking it
on the pressure gauge.
- Again loosen the top part (4) of the valve until you hear the
characteristic noise of the beginning of the steam release
phase.
- Close the lock nut (5) again without turning the top part.
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