Unigas PG70, Manual Of Installation - Use - Maintenance

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CIB UNIGAS - M039191CA
24
PG60:
To let the burner operate at a lower output, turn clockwise the
VRT
screw and move progressively the combustion head back towards
the MIN position.
PG70-PG81:
To let the burner operate at a lower output, loose the
VB
screw and move progressively the combustion head back towards the MIN
position, by turning clockwise the
VRT
ring nut. Fasten
VB
screw when the adjustment is accomplished.
Attention!
if it is necessary to change the head position, repeat the air and gas adjustments described above.
14 once the air and oil flow rate have been adjusted at the maximum output, go on with the point to point adjustment on the
SV
adju-
sting cam as to reach the minimum output point: gradually move the adjusting cam in order to adjust each of the
V
screws as to
describe the cam foil shape.
15 to change the
SV
position set the actuator on the manual mode (MAN), turn the adjusting cam
SV
and set again the actuator to the
AUTO mode to lock the adjusting cam;
16 act on the
V
screw that mathces the bearings referring to the adjusting cam position;
17 to adjust the next screw, set again the actuator mode to
MAN
, turn the adjusting cam and set the actuator to
AUTO
mode to lock
the adjusting cam on the next screw; adjust it and go on this way to adjust all the screws in order to set the cam foil shape, accor-
ding to the combustion values read.
18 Once the cam foil shape is defined, reconnect the
TAB
thermostat reconnecting the wire to the terminal no.6 or setting the RWF40
burner modulator to AUTO or the CMF switch to 3 (only for fully-modulating burner).
19 Turn the burner off then start it up again.
20 Once the pre-pu rge time comes to end, drive the burner to the high flame sta ge by the
TAB
thermostat: check the combustion
values;
21 drive the burner to low flame, if necessary adjust the low flame size (output) by inserting a screwdriver on the slot
F
to move the
BF
cam.
PG60 PG70-PG81
VB
VB
VRT
”MIN” position ”MAX” position
SC
ID
RP
V
SV