baltur Minicomist 7 Manual page 18

The gas valve unit DUNGS MB - DLE... is made up of:
E
1) A safety valve which closes opens rapidly.
2) A principle valve which opens in two stage (5). The first opening
N
stage occurs rapidly (release) and is adjustable by unscrewing
the knob (2) and inserting the back part of the regulating pin
G
underneath. The + and symbol can be seen on the head of the
valve and these indicate the direction in which the pin should be
L
turned in order to increase or the ignition output (the first stage of
the valve opening). By rotating in a clockwise direction, the initial
I
delivery (ignition flame) can be reduced; in an anti-clockwise
direction, the initial delivery is increased. The complete run from
S
zero to maximum, and viceversa, is slightly more than three
turns (40% of the total opening). When the first opening stage
H
has taken place, the valve comtinues to open slowly and takes
15 seconds to reach the maximumopen position. To regulate
maximum delivery desired, loosen the locking screw (4) (the one
with the protruding head and not the one locked and sealed with
paint) and turn knob (3). Rotate in a clockwise direction to reduce
delivery and in anti-clockwise direction to increase it.
It should be pointed out that when the regulating knob is turned, the
end - of - the - run which limits the operating of the valve moves;
therefore, when the knob has been turned untilit reaches the - sign,
the valve will not open and the burner will not ignite. To get ignition,
it's necessary to turn the knob in an anti-clockwise direction towards
the + sign. The complete run from zero to maximum and viceversa is
neary six turns of the knob. This regulating operation (for maximum
and ignition output) must be carried out without forcing against the
end - of - the - run - positions.
3) The pressure stabilizer (10) can be regulated (see table) by
manoeuvring the screw which can be reached by sliding the
cover (1) to one side. The complete run from the maximum to
the position and viceversais about 80 turns. Do not force against
the end - of - the - run positions. Around the screw are arrows
with symbols which indicate the sense of rotation: to increase
pressure, rotate in a clockwise direction, to reduce it, rotate in
an anti-clockwise direction. This stabilizer hermetically closes
"upstream" and "downstream" when there is no flow of gas.
Dfferent springs to obtain different pressure value from those
described above are not foreseen.
To regulate the pressure stabilizer, connect a water mano-
meter to the rubber tube holder installed on the tap (8) in
correspondence with the exit of the stabilizer.
4) The small entry filter (12) can be reached for cleaning by removing
one of the two side closing plates.
5) The minimum pressure switch (14) and the maximum pressure
switch (15). To regulate it remove the transparent cover and
operate the black knob. The reference mark is the small rec-
tangle to be found on the yellow disk which the regulating knob
rotates around.
6) At entry, a tap (13) has been fitted to the connction flange to
measure the entry pressure. At the exit of the connection flange,
there is also a tap (7) to measure the pressure in exit.
VALVE
MODEL
MB ...B01 S 20
INLET MAX PRESSURE
(PE) mbar
200
7) The side pressure taps (9), indicated as Pe, are in communication
with the entry pressure.
8) The side pressure taps (8) indicated as Pa, are used to measure
the pressure coming out of the stabilizer. It might be useful to
know, that the pressure coming out of the valve unit (to be
measured at tap 7), corrisponds to the pressure regulated by
the stabilizer and is reduced in order to overcome the crossing
resistance of the principle valve (5). It should be pointed out,
that the valve crossing resistances depend on the opening of the
valve regulated by knob 3 through wjich the end - of - the - run
position is adjusted. To regulate the pressure stabilizer, conn-
ct a water manometer to the rubben tube holder installed on
tap (8) in correspondence to the stabilizer exit (Pa).
9) The holes of the pressure stabilizer bleed (11) should be free and
unblocked if it's to function properly.
SUGGESTIONS FOR REGULATING THE GAS VALVE
1) Connect a water manometer to the pressure tap Pa (indicated
as n° 8) to measure the pressure coming out of he stabili-
zer.
2) Put the gas delivery regulators for ignition (2) and for maximum
delivery (3) in the positions presumed necessary for the delivery
desired. Also open adequately the combustion air regulator.
3) Turn on the burner.
4) With the burner on, manoeuvre the regulating screw (1) of the
stabilizer regulator of the gas pressure and regulator of the gas
pressure and regulate the pressure at the value considered ne-
cessary to obtain the output desired, when the maximum output
regulator (3) is in the maximum opening position. It should be
pointed out that, normally, the above conditions require about
40 ÷ 70 mm.W.C.
5) Put the ignition output regulator (2) in the position considered
necessary to obtain ignition with the minimum delivery possible.
ADJUSTTABLE OUTLET PRESSURE
FROM THE STABILIZER (PA) mbar
from 4 to 20
18 / 18
0006081159_201102
TYPE OF GAS
Natural Gas / L.P.G.