baltur Minicomist 7, Instructions Manual

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24
NATURAL GAS / LIGHT OIL DUAL FUEL BURNERS
BT 8502 HYDRAULIC DIAGRAM FOR MINICOMIST 7 – MINICOMIST 11
8502cmt18.tif
Light oil electrovalve
Nozzle
Light oil pump
(12 bar pressure)
Return
Suction
Foot valve
ELECTRICAL CONNECTIONS
Electric lines should be at an adequate distance from hot parts.
Make sure that all electrical connections are made with flex electric wire, with suitable size for the voltage and
absorbed power.
Maximum current absorbed = 600 VA
Minimum section of the feed line = 1mm
2
with 230V.
CONTROL BOX model LGB 22 CHARACTERISTICS
Waiting time = 9”
Prewashing time = min. 30”
Safety time = 3”
For the LGB “” control box, the intensity of the cell current should be between 200 microamperes and 500
microamperes.
DUAL FUEL BURNER’S FIRING INDICATION
We suggest to start the burner with the liquid fuel, as in this case the delivery is bound to the nozzle size whilst the
gas delivery can be easily changed by acting on the relative capacity adjuster.
If the burner is in the automatic version, the selector for the fuel change connects a cyclic relay which inserts,
tanks to an auxiliary relay, components for the use of both fuels (valves, pressure switches, pump etc.).
After having changed the position of the selector from gas to light oil and voiceovers, it occurs to leave it stopped
for at least 10 seconds which is the time the cyclic relay needs to carry out its program.
ATTENTION
If the selector is moved from a position to another before the period of 10 seconds, the cyclic relay stops in the
middle of its program not allowing to use the burner both with gas and with light oil.