Cuenod NC12 GX107/8, Operating Instructions Manual

Page: 12 / 60

10/2007 - Art. Nr. 13 017 700B 12
Start-up
Description and settings
2-stage gas valve
2-stage gas valve
MB ZRDLE...B01S..
Compact assembly consisting of a filter,
an adjustable air pressure switch, a non
adjustable, quick acting safety valve, an
adjustable pressure controller, two
valves 1
st
and 2
d
stage of which the flow
stage is incrementally adjustable on
opening.
Upon delivery:
- The valve is preset for the power
values shown in the table
- The progressive rate is set to a
two-turn opening
- The stage two valve is open to its
maximum extent.
- The pressure switch is set to minimum.
General setting procedure
The setting for stage two is only carried
out by actuating the pressure controller:
the stage two valve (button
C ) is open to
its maximum extent.
The progressive rate upon ignition and
changing from one stage to another is
set by actuating button
B .
The setting for stage one is carried out
by actuating crown
D .
Controller setting:
Controller pressure measurements are
carried out at
pBr .
The pressure setting provides the
desired flow rate.
Setting the progressive rate:
This hydraulic brake function acts on the
ignition flow rate and the shift between
stages.
• Unscrew plastic stopper
B .
• Turn it around and use it as a spanner.
The setting has a 3-turn stroke.
• Rotate it in the direction of the:
- arrow : the progressive rate will
increase
+ arrow : the progressive rate will
decrease.
Particular case
Nominal flow stage setting
This is necessary only if the flow stage
read under a pressure of 4 mbar on the
controller is too high.
Do as follows:
• loosen the locking screw avoiding to
touch the opposite painted screw.
Plug
C has a 4.5-turn travel length.
• Make the screw rotate in a cw direction
arrow - . The flow stage decreases
and vice versa.
It might be necessary to adjust the
pressure.
• Tighten the locking screw.
Incremental advance setting
Main flow stage
setting
Setting 1
st
stage
Pressure switch
Coil
Access to filter
Connecting
flange
pBr
Pressure
controller
setting
S 20 = 4 to 20 mbar
S 50 = 4 to 50 mbar
Locking
screw
Painted
screw
Setting the stage one flow rate
• Unscrew the locking screw without
touching the painted screw opposite.
• Rotate crown D clockwise by hand
(without using a tool): the flow rate will
decrease and vice versa.
• Tighten the locking screw back up.