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INSTRUCTIONS FOR SETTING DUNGS GAS VALVES
mod. MVD ... and MVDLE ...
Mod. MVD....
D = Identification plate
E = Flow direction indicator
Mod. MVDLE....
H = Identification plate
I
= Flow direction indicator
The MVD gas valves open and
close rapidly.
To regulate the gas flow, unscrew
and remove cap "A" and loosen
nut "B".
Then, using a screwdriver turn
screw "C". Unscrewing it increases
the gas flow, tightening it decreases
the flow.
After regulating, lock nut "B" in place
and reposition cap "A".
HOW THE VALVE FUNCTIONS
mod. MVDLE
The gas valve has a rapid initial trip
(opening can be adjusted from 0 to
40% using pin "G"). Full opening
from that point on takes place slowly
over approximately 10 seconds.
N.B. There will not be sufficient
supply for ignition if the flow
feed device "E" is set at its
minimum position. Therefo-
re, it is essential to open the
maximum flow rate control
device "E" sufficiently to en-
sure ignition.
52 / 112
0006081054_200810
N° 8875-GB
Rev. 06/11/90
Setting the initial rapid release
trip
To set the initial rapid release, un-
screw the protection cap "F" and
use the back of this cap as a tool to
turn pin "G".
Turning clockwise decreases the
gas flow, turning counter-clockwise
increases it.
This done, return cap "F" to its ori-
ginal position.
Setting maximum gas flow
To adjust the gas flow rate, loosen
screw "D" and turn knob "E". Tur-
ning clockwise decreases the gas
flow, turning counter-clockwise
increases it.
This done, tighten screw "D".
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