02/2011 - Art. Nr. 4200 1027 9501B16
Commissioning
Setting the MB-ZRDLE gas train
General adjustment procedure
The 2
nd
stage can only be adjusted via
the pressure regulator Set the 2
nd
stage
valve (button C) to fully open.
The incremental advance setting on
ignition and on switching stages is
performed using button B.
The 1
st
stage setting is performed using
ring D.
Adjusting the regulator:
The pressure in the regulator is
measured at pBr.
The set pressure supplies the required
flow rate.
Incremental advance setting on
ignition
This hydraulic function affects the gas
valve opening characteristics during
ignition and when switching stages.
• Unscrew plastic cap B.
• Turn it around and use it as a key.
• Turn in the direction of:
arrow to -: the incremental advance
increases
arrow to +: the incremental advance
decreases
Setting the 2
nd
stage using the
adjusting knob C.
This operation is only required when the
burner power is too high with a pressure
of 5 mbar between the valves, or when
the burner is tending to pulse.
Proceed as follows:
• Unscrew the locking screw without
touching the painted screw on the
other side. The cap C is turned 4.5
times.
• Rotate clockwise arrow to -: the flow
is reduced, and vice-versa.
The pressure may need to be corrected.
Adjusting the flow of the 1
st
stage
By hand (not tool).
• Reduce gas throughput by turning ring
D clockwise (located on the lower
section of the solenoid coil). Turn anti-
clockwise to increase gas throughput.
(there is a difference of 3 whole turns
between the minimum and the
maximum).
Note
Adjusting the gas throughput for the 2
nd
stage may also alter the throughput for
the 1st stage. If this is the case, the 1
st
stage must be readjusted.
• Afterwards, retighten the locking
screw.
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