baltur BTG 3, Instruction Manual For Use, Page: 40 / 92

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0006080742_201306
ENGLISH
The gas valve unit DUNGS MB - DLE... is made up of:
• A safety valve which closes opens rapidly.
• A principle valve which opens in two stage (5). The first opening
stage occurs rapidly (release) and is adjustable by unscrewing
the knob (2) and inserting the back part of the regulating pin
underneath. The + and symbol can be seen on the head of the
valve and these indicate the direction in which the pin should
be turned in order to increase or the ignition output (the first
stage of the valve opening). By rotating in a clockwise direction,
the initial delivery (ignition flame) can be reduced; in an anti-
clockwise direction, the initial delivery is increased. The complete
run from zero to maximum, and viceversa, is slightly more than
three turns (40% of the total opening). When the first opening
stage 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.
• 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 manometer to the rubber tube
holder installed on the tap (8) in correspondence with the
exit of the stabilizer.
• The small entry filter (12) can be reached for cleaning by
removing one of the two side closing plates.
• The minimum pressure switch (14). To regulate it remove the
transparent cover and operate the black knob. The reference
mark is the small rectangle to be found on the yellow disk which
the regulating knob rotates around.
VALVE MODEL INLET MAX PRESSURE (PE)
mbar
ADJUSTTABLE OUTLET PRESSURE
FROM THE STABILIZER (PA) mbar
TYPE OF GAS
MB ...403 B01 S 20 200 from 4 to 20 Natural gas / L.P.G.
MB ... .... B01 S 20 360 from 4 to 20 Natural gas / L.P.G.
• 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.
• The side pressure taps (9), indicated as Pe, are in communication
with the entry pressure.
• 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,
connct a water manometer to the rubben tube holder
installed on tap (8) in correspondence to the stabilizer
exit (pa).
• 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
• Connect a water manometer to the pressure tap Pa (indicated
as n° 8) to measure the pressure coming out of he stabilizer.
• 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.
• Turn on the burner.
• 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
necessary 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.
• Put the ignition output regulator (2) in the position considered
necessary to obtain ignition with the minimum delivery possible.