baltur BTG 15 Instructions For Use Manual page 49

COMBINED DUNGS VALVE (monobloc) mod.MB-DLE...B01
The gas valve unit DUNGS MB - DLE... is made up of:
1) A safety valve which closes opens rapidly.
2) A principle valve which opens in two stage (5). The fi rst opening stage occurs rapidly (release) and is adjustable by un-
screwing 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 fi rst stage of the valve opening). By rotating in a clockwise direction, the initial delivery (ignition fl ame) 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 fi rst 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.
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 her-
metically closes "upstream" and "downstream" when there is no fl ow 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.
4) The small entry fi lter (12) can be reached for cleaning by removing one of the two side closing plates.
5) 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.
6) At entry, a tap (13) has been fi tted to the connction fl ange to measure the entry pressure. At the exit of the connection
fl ange, there is also a tap (7) to measure the pressure in exit.
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 regu-
lated 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).
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 stabilizer.
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 necessary to obtain the output desired, when the maxi-
mum 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.
VALVE INLET MAX PRESSURE
MODEL
MB ...403 B01 S 20
MB ... .... B01 S 20
ONE STAGE NATURAL GAS BURNERS
(PE) mbar
200
360
0006080876 ed 2007/02
ADJUSTTABLE OUTLET PRESSURE
FROM THE STABILIZER (PA) mbar
from 4 to 20
from 4 to 20
47 / 87
N° 0002910301
Rev.16/02/2004
TYPE OF GAS
Natural gas / L.P.G.
Natural gas / L.P.G.