baltur TBG 55ME Mode D'emploi page 17

minimum pressure must make use of the contact, which is
closed, when it measures a pressure which exceeds that
at which it has been set. The maximum pressure switch
must make use of the contact, which is closed, when it me-
asures 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
be in function with the pressure found each time. Theinterven-
tion (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.
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".
15) Check the efficiency of the boiler thermostats and pressure
switches (this should result in the burner coming to a stan-
dstill).
N.B. Check that that ignition takes place correctly because if the
mixer is forward it may happen that the speed of the delivery
air is so high that ignition becomes difficult. If this happens the
mixer must be moved back by degrees until it is in a position at
which ignition takes place normally, at which point this can be
taken as the final position.
We remind you that it is advisable, as regards the ignition flame,
to restrict the quantity of air to the minimum necessary for safe
ignition, even in the most difficult cases.
MANUAL MODE BURNER INSTRUCTIONS
Combustion control can be carried out over the whole modulation
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 + button to
increase the gas and air supply or - to reduce it.
After the check, put the 4-pole plug (A) back in so as to reset auto-
matic mode modulation.
should
IONISATION CURRENT MEASUREMENT
The current minimum for the working equipment is 1.4 µA. The
burner gives a clearly greater current which will not normally re-
quire any controls. If, however, you wish to measure the ionisation
current, you have to connect a milliammeter in series with the ioni-
sation electrode cable as shown in the diagram
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