Unigas IDEA LG280, Manual Of Installation - Use - Maintenance

Page: 36 / 89

C.I.B. UNIGAS - M039132CD
36
When wishing to monitor the test, install a pressure gauge ranged to that of the pressure supply point PA (Fig. 47). If the test cycle is
satisfactory, after a few seconds the consent light LC (yellow) comes on. In the opposite case the lockout light LB (red) comes on. To
restart it is necessary to reset the appliance by pressing the illuminated pushbutton LB .
Calibration of air and gas pressure switches
The air pressure switch locks the control box if the air pressure is not the one requested. If it happens, unlock the burner by means of
the control box unlock pushbutton, placed on the burner control panel.
The
gas pressure switches check the pressure to avoid the burner operate when the pressure value is not in the requested pressure
range.
Calibration of air pressure switch (only for single stage burners)
Calibration is carried out as follows:
z
Remove the transparent plastic cap.
z
Once air and gas setting have been accomplished, startup the burner.
z
While the burner is operating, rotate slowly and clockwise the adjusting ring nut VR , until the burner locks; read the pressure value
on the scale of the pressure switch and set it again to a value reduced by the 15%.
z
Repeat the start-up cycle and check the burner runs properly.
z
Refit the transparent plastic cover on the pressure switch.
Calibration of air pressure switch (double-stage, progressive and fully-modulating)
To calibrate the air pressure switch, proceed as follows:
z
Remove the transparent plastic cap.
z
Once air and gas setting have been accomplished, startup the burner.
z
During the pre-purge phase o the operation, turn slowly the adjusting ring nut VR in the clockwise direction until the burner lockout,
then read the value on the pressure switch scale and set it to a value reduced by 15%.
z
Repeat the ignition cycle of the burner and check it runs properly.
z
Refit the transparent plastic cover on the pressure switch.
Fig. 46 Fig. 47
A
B
LC
LB
PA
C