Service manual First stage Legend
Service Manual 1st stage Legend
Rev. 12/2011
15
g. Screw a DIN to Yoke Adapter on the DIN handwheel
to compress the assembly.
h. Tighten the DIN Shutter Valve (129202 / 129714 /
129207) up to 0,3 m.Kg (4mm Hex).
i.
Remove the DIN2Yoke Adapter from the Handwheel
a.
Remove the regulator from the clamp,
remove the tool and fit a HP plug with its new lubricated
O-ring.
ADJUSTING THE FIRST STAGE
Note : Please refer to Table 5. Checking
Specifications for the adjustment values and the
tolerances.
1. Screw an MP gauge (0-16 bar) into one of the MP ports.
If the gauge is not fitted with an over-pressure valve,
then it is vital that the second stage is fitted so that it can
act as an over-pressure valve in the event of an HP leak.
2. Connect the first stage to a cylinder charged to 200bar.
Slowly open the cylinder valve to put the regulator under
pressure.
Attention
: if the MP indicated rapidly
exceeds 9.5bar then this indicates a HP
leak. Close the cylinder valve immediately
and purge the regulator. Refer to
Table 1
.
Troubleshooting Guide.
3. After
checking
that
there is no leak,
adjust the MP by
turning the
adjusting screw:
Screwing in
increases the MP,
unscrewing
reduces the MP.
Turn the screw by increments of 1/8 of a turn and purge
the regulator several times, using the second stage, after
each increment. Adjust the MP as follows :
IP at 8.5 bar: ALL LEGEND VERSIONS
Once the MP has been adjusted, purge the second stage
about ten times. When this is finished check the pressure
gauge. The MP should be stable at the desired value
(8.5b). Make any further adjustments that may be
necessary. Leave the regulator under pressure for
several minutes and check that the MP remains stable.
If the MP rises more than 0.3 bar this indicates that there
is a leak. Refer to
Table 1
.
Troubleshooting Guide.
4. Close the cylinder valve and completely purge the
regulator. Put the regulator under pressure once more
and check that the MP is at
8.5 bar.
If the MP is different, repeat steps 3 and 4 until a stable
pressure is obtained.
