baltur 17170010, Instruction Manual For Installation, Use And Maintenance

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The DUNGS MB-DLE... gas valve unit is made up of:
• A safety valve which closes opens rapidly (6).
• A main valve which opens in two stages (5). The first opening stage
occurs rapidly (release) and can be adjusted unscrewing the knob
(2) and inserting it overturned on the underlying adjusting pin. The
+ and - symbols on the valve head indicate the direction in which
the knob should be turned to change gas ignition flow rate (first
valve opening stage). Rotating in a clockwise direction, the ignition
delivery diminishes; rotating in an anti-clockwise direction, the de-
livery increases. The complete stroke from zero to the maximum is
slightly more than three turns (40% of the total opening), and vice
versa. When the first opening stage has taken place, the valve con -
tinues to open slowly and takes 15 seconds to reach the maximum
open position. To adjust the desired maximum delivery, loosen the
screw with locking protruding head (4) and turn the knob (3). Do
not tamper with the painted screw. Turn 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; there-
fore, when the knob has been turned until it reaches the - sign, the
valve will not open and the burner will not ignite. To get ignition, it
is necessary to turn the knob in an anti-clockwise direction towards
the + sign. The complete run from zero to maximum and vice versa
is nearly six turns of the knob. This adjusting operation (for maxi -
mum and ignition output) must be carried out without forcing the
corresponding end of stroke.
• The pressure stabiliser (10) can be adjusted (see table) using the
screw which can be accessed sliding the cover (1) to one side. The
complete run from the maximum to the position and vice versa is
about 80 turns. Do not force against the end-of-the-run positions.
Around the access opening there are arrows with symbols indica -
ting the rotation direction for pressure increase (clockwise) or de-
crease (anti-clockwise). This stabilizer creates a hermetic closure
between the "upstream" and "downstream" sections when there is
no flow. Different 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 sta -
bilizer (Pa). |bb|
• The inlet filter (12) can be accessed for cleaning removing one of
the two side closing plates.
• Minimum pressure switch (14). For adjusting remove the transpa-
rent cover and operate the black knob. The reference mark is a
small rectangle on the yellow disk around which the adjusting knob
rotates.
• At the inlet, a fitting (13) has been installed on the connection flan -
ge to measure the inlet pressure. At the connection flange outlet,
there is also a fitting (7) to measure the outlet pressure.
• The side pressure fittings (9), indicated as Pe, are in communica -
tion with the inlet pressure.
• The side pressure taps (8) indicated as Pa, are used to measu-
re the pressure coming out of the stabilizer. It is useful to know,
that the pressure coming out of the valve unit (7) corresponds to
the pressure regulated by the stabilizer and is reduced in order to
overcome the crossing resistance of the principle valve (5). The
valve crossing resistances depend on the opening of the valve re-
gulated by the knob (3) through which the end-of-stroke position
is adjusted. |b|To regulate the pressure stabilizer, connect a water
manometer to the rubber tube holder installed on tap (8) in corre -
spondence to the stabilizer exit (Pa).|b|
• The holes of the pressure stabilizer bleed (11) should be free and
to ensure a proper operation.
SUGGESTIONS FOR ADJUSTING THE GAS VALVE
• Connect a water manometer to the pressure tap Pa (8) to measure
the pressure coming out of the 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 the combustion air regulator.
• Turn on the burner.
• With the burner on, operate under the cover (1) on the adjusting
screw of the gas and pressure stabiliser and adjust pressure to the
value considered necessary to obtain the desired output, approx.
40-70 mm. W.C. when the maximum output regulator (3) is in the
maximum opening position.
• Put the ignition flow regulator (2) in the position considered neces -
sary to obtain ignition with the minimum possible delivery.
CAUTION / WARNINGS
With irregular ignitions, adjust the pressure to the stabiliser (8)
at 20 mbar.
ENGLISH
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