baltur BGN 200 DSPGN-ME Mode D'emploi page 38

the places of two cables of the
motor's supply line in order to
invert its sense of rotation.
8) Now insert the switch on the
command panel. The control
box receives voltage in this way
and the programmer turns on
the burner as described in Chap-
ter "Description of Operations".
To adjust the burner see the To adjust the burner see the
"MPA 22" electronic cam instruc-
tions in the attached manual
code 0006080902.
9) After adjusting the "minimum",
(P1) bring the burner towards
maximum via the controls on
the MPA 22 keypad. (see MPA
22 electronic cam instructions
in the attached manual code
0006080902).
10) We recommend that you carry
the out combustion tests with
the appropriate instrument at all
intermediate points in the mo-
dulation range (from P1 to P9);
also check the gas fl ow delivery
rate via the meter.
11) New check correct working of
automatic mode modulation
(see electronic cam "MPA 22"
instructions in the enclosed
manual code 0006080902).
In this mode the equipment
receives the signal from the
electronic modulation adjuster
RWF40, if the burner is in its
modulating version, or from the
thermostat or pressure switch of
the second stage if the burner
is the two-stage progressive
version.
12) The air pressure switch The air pressure switch has the
job of bringing the control box
to a safety shut down if the air
pressure is not at the correct
value. Therefore, the air pres-
sure switch must be regulated
in such a way as to intervene
by closing the contact (foreseen
to by closed while working)
when the air pressure in the
burner has reached a suffi cient
level. The pressure switch is
self-controlled and therefore
it must close the contact (fan
stops and consequently there
DETAIL OF GAS FEED REGULATOR THROTTLE VALVE WITH DUNGS
SERVOMOTOR
A Gas throttle valve
position reference index
B Gas modulation
servomotor
is an absence of air pressure
in the burner) if it does not, the
control box will be inserted (the
burner remains at a stadstill).
It must be specifi ed that if the
contact is not closed during
working (insuffi cient air pressu-
re), the control box will carry out
its cycle, but the ignition tran-
sformer will not be inserted and
the gas pilot valves will not open.
Consequently, the burner will go
to "shut down". Check that the
air pressure switch functions
properly with burner at minimum
delivery, increase the regulating delivery
value until it reaches interven-
tion point and the burner should
go to shut down. To unblock the
burner, press the special push-
button and return the pressure
switch regulator to a suffi cient
value in order to measure the
air pressure existing during the
pre-ventilation phase.
13) The pressure switches which The pressure switches which
control the gas pressure control the gas pressure (mini-
mum and maximum) have the
job of stopping the burner func-
tioning when the gas pressure is
not within the values specifi ed.
From the specifi c functions of
the pressure switches, it is evi-
dent that the pressure switch
controls the minimum pressure
must make use of the contact,
which is closed, when it measu-
res a pressure which exceeds
that at which it has been set.
The maximum pressure switch
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0006081117_2006/09
must make use of the con-
tact, which is closed, when it
measures a pressure below
that at which it has been set.
The minimum and maximum
gas pressure switches should
be regulated during the bur-
ner's general inspection and
should be in function with the
pressure found each time.
Theintervention (by this we
mean the opening of the cir-
cuit) of any one of the gas
pressure switches, will prevent
the control box and thus the
burner from starting up. When
the burner is operating (fl ame
lit), the intervention of the gas
pressure switches (opening
of the circuit) determines the
immediate arrest of the burner.
During the burner's general ins-
pection, check the correct func-
tioning of the pressure switches.
By operating the respective
regulating device, it is possible
to control the pressure switch's
intervention (opening of cir-
cuit) which causes the burner's
arrest. (see also the MPA 22
instructions on the following
pages).
14) Check the effi ciency of the fl ame
detector (ionisation electrode)
by detaching the wire coming
from the electrode and by tur-
ning on the burner. The control
box should carry out comple-
tely its cycle and two seconds
after the ignition fl ame (pilot)
is formed, it should go to "shut