baltur GI Series Instruction page 28

considerably reduced when the fuel delivery is reduced; on the
other hand, when the fuel delivery is fairly high, the air passage
between the disk and the head should be relatively open). See
Chapter "Air Regulation on the Combustion Head".
6) Apply a manometer with an adequate scale (if the entity of
pressure forecast allows it is preferable to use a column of
water instrument, do not use a pointer instrument for moderate
pressure) to the pressure plug on the gas pressure switch.
7) With the switch "1" on the control panel in the "o" position
and the main switch inserted check, by manually closing the
relay, that the motor rotates in the right direction. If it does not,
exchange 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 con-
E
trol box receives voltage in this way and the programmer
turns on the burner as described in Chapter "Descrip-
N
tion of Operations".
G "MPA 22" electronic cam instructions in the attached manual
code 0006080902.
L
9) After adjusting the "minimum", (P1) bring the burner towards
I
maximum via the controls on the MPA 22 keypad. (see MPA
22 electronic cam instructions in the attached manual code
S
0006080902).
H
10) We recommend that you carry the out combustion tests with
the appropriate instrument at all intermediate points in the
modulation range (from P1 to P9); also check the gas flow
delivery rate via the meter.
11) New check correct working of automatic mode mo-
dulation (see electronic cam "MPA 22" instruc-
tions in the enclosed manual code 0006080902).
In this mode the equipment receives the signal from the electro-
nic 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 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 pressure 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 sufficient level. The pressure switch is self-controlled and
therefore it must close the contact (fan stops and consequently
there 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 specified that if the contact is not closed during
working (insufficient air pressure), the control box will carry
out its cycle, but the ignition transformer will not be inserted
and the gas pilot valves will not open. Consequently, the bur-
ner will go to "shut down". Check that the air pressure switch
functions properly with burner at minimum delivery, increase
the regulating value until it reaches intervention 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 sufficient value in order to measure the air pressure existing
during the pre-ventilation phase.
To adjust the burner see the
0006081361_200805
13) The pressure switches which control the gas pressure (mi-
nimum and maximum) have the job of stopping the burner
functioning when the gas pressure is not within the values spe-
cified. From the specific functions of the pressure switches, it is
evident that the pressure switch controls the minimum pressure
must make use of the contact, which is closed, when it mea-
sures a pressure which exceeds that at which it has been set.
T h e m a x i m u m p r e s s u r e s w i t c h m u s t m a k e
use of the contact, which is closed, when it measu-
res a pressure below that at which it has been set.
The minimum and maximum gas pressure switches should
be regulated during the burner's general inspection and
should be in function with the pressure found each time.
Theintervention (by this we mean the opening of the circuit) 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 (flame lit), the intervention of the gas pressure
switches (opening of the circuit) determines the immediate
arrest of the burner. During the burner's general inspection,
check the correct functioning of the pressure switches.
By operating the respective regulating device, it is possible to
control the pressure switch's intervention (opening of circuit)
which causes the burner's arrest. (see also the MPA 22 instruc-
tions on the following pages).
14) Check the efficiency of the flame detector (ionisation electrode)
by detaching the wire coming from the electrode and by turning
on the burner. The control box should carry out completely its
cycle and two seconds after the ignition flame (pilot) is formed,
it should go to "shut down". This control should also be carried
out when the burner is already operating. By detaching the
wire that comes from the ionisation electrode, the control box
should go immediately to "shut down". In the case of the UV
photoelectric cell, slide the wire out of its seat on the burner
and verify the "shut down".
15) C h e c k t h e
boiler thermostats and pressure switches (this should result in
the burner coming to a standstill).
N.B.
Check that the ignition occurs in a regular manner, if the pas-
sage between the head and the disk is closed, it may occur
that the speed of the mixture (combustible air) is so high that
ignition is made difficult. If this occurs, then the regulator must
be opened gradually until it is in a position where the ignition
occurs in a regular manner, and this position must be accepted
as the act position. Remember that, for the ignition flame, it is
preferable to limit the quantity of air to the bare minimum neces-
sary for a safe ignition, even in the most demanding cases.
16) Instructions for manual mode working of the burner
Combustion control can be carried out over the whole modu-
lation range while manually controlling the MPA 22 equipment.
For this use modulation connector (B) in the diagram, which is
provided with the burner as standard. After disconnecting the
4-pole plug (A) which takes the signals from the thermostat or
the RWF 40 adjustor, insert the connector in position (B). Use
the +/- buttons to increase or reduce the gas and air supply.
After this control, put the 4-pole plug (A) back in so as to reset
automatic mode modulation.
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e f f i c i e n c y o f t h e