Unigas PBY90, Руководство по установке, использованию и обслуживанию

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C.I.B. UNIGAS
- M03993CH
32
far from the shaft the air damper closes and the air flow rate decreases.
Note: once the procedure is perfomed, be sure that the blocking nut RA is fasten. Do not change the position of the air damper rods.
16 If necessary, change the combusiton head position (see page 29).
Attention! if it is necessary to change the head position, repeat the air and gas adjustments described above.
17 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.
18 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;
19 act on the V screw that mathces the bearings referring to the adjusting cam position;
20 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.
21 Once the cam foil shape is defined, reconnect the TAB thermostat by 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).
22 Turn the burner off then start it up again.
23 Once the pre-purge time comes to end and the burner is on, drive the burner to the high flame stage by the TAB thermostat: check
the combustion values;
24 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.
25 The low flame position must never match the ignition position that is why cam BF must be set 20°- 30° more than the ignition posi-
tion.
26 Turn the burner off; then start it up again. If the adjustment is not correct, repeat the previous steps.
Calibration of air pressure switch
To calibrate the air pressure switch, proceed as follows:
z
Remove the transparent plastic cap.
z
Once air and heavy oil 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.
Fully-modulating burners
To adjust the fully-modulating burners, use the CMF switch on the burner control panel (see next picture), instead of the TAB thermo-
stat as described on the previous paragraphs about the progressive burners. Go on adjusting the burner as described before, paying
attention to use the CMF switch intead of
TAB .
The CMF position sets the oprating stages: to drive the burner to the high-flame stage, set CMF=1; to drive it to the low-flame stage, set
CMF=2.
To move the adjusting cam set CMF=1 or 2 and then CMF=0.
VRA
RA
TR
BF
F
VR