Riello GI/EMME 1400 Manual page 37

6.11.4 Minimum oil pressure switch
The minimum oil pressure switch is calibrated in the factory at 16-
18 bar. If the oil pressure falls below this value in the delivery line,
the pressure switch stops the burner.
The burner restarts automatically if the pressure goes above bar
value set after the burner starts.
6.11.5 Maximum oil pressure switch
The maximum oil pressure switch is calibrated in the factory at 4-
5 bar. If the oil pressure in the return line goes above this value,
the pressure switch stops the burner in a lockout.
To adjust the pressure switches, use a tool to operate the
adjustment screw (Fig. 37).
6.11.6 Air bleeding
It is carried out by opening the relevant screw placed on the
minimum gas pressure switch fitted on the gas train.
6.11.7 Gas butterfly valve
The gas butterfly valve is equipped with an external adjustment,
see Fig. 39, that can facilitate the following calibration of the cam
in case of low pressure values available in the network. By means
of ring nut B it is possible to modify the passage section to the
minimum setting.
– 0 minimum opening
– 2 maximum opening
At the end of the adjustment lock with dowel A.
AIR / GAS ratio adjustment
The adjustment of the gas delivery to that of the air must be
carried out after defining the light oil operation conditions, and
can be obtained by varying the cam profile.
Start-up, calibration and operation of the burner
20079898
Key (Fig. 38)
1 - Screw
2 - Connection for pressure measurement
3 - Pressure switch
35 GB
Fig. 37
D1391
Fig. 38
D1395
Fig. 39
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