4499
9
GB
*
flow not allowed for a correct combustion.
5.2.2 PRESSURE REGULATOR ADJUSTMENT
Pressure variation (pressure gauge 1, fig. 10) modifies oil output flowing out the nozzle.
To calibrate the oil range within which the nozzle should operate, adequately adjust the fuel maximum and minimum pressure ac-
cording to the nozzle chart.
-
Once the nozzle is installed, remove the servomotor protection cover (12, fig. 1), and start up the burner.
-
As soon as it is started, cut off voltage to the servomotor by opening the connector located on the switchboard (19, fig. 1). In this
way the burner operates at minimum flow.
-
Release the variable profile cam of the servomotor by pressing the reset button (5, fig. 8).
-
Manually make the variable profile cam firmly connected to the eccentric (7, fig. 10) rotate slowly and check the pressure variation
on the pressure gauge (1, fig. 10). Pressure and nozzle delivery are minimum when the servomotor is at 20°. Pressure and nozzle
delivery are maximum when the servomotor is at 130°.
Correct pressure on the return line by varying the eccentric (7, fig. 10) and the nut with the lock nut (5, fig. 10).
5.2.3 PRESSURE REGULATOR
To calibrate the eccentric (7):
remove the casing (8), undo the screws (6), operate on the screw (3) until the desired eccentricity is obtained. Turn the screw (3) to
the right () to increase eccentricity and also the difference between the nozzle maximum and minimum flow. Turn the
screw (3) to the left () to reduce eccentricity and also the difference between the nozzle maximum and minimum flow.
CODE
Nozzle
15 AG 45°
Viscosity
at nozzle
Oil density
Oil flow
kg/h
Air/steam
consumption in kg/h
Recommended
air/steam
pressure
cSt
kg/hm
3
6 bar
5 bar
4 bar
3 bar
2 bar
High
flame
Low
flame
bar
3
045
008
250
5
850
468
410
340
250
120
10.4
35.2
2
10
875
396
340
270
180
80
24.5
57.1
3
20
900
315
252
175
110
N/A*
42.4
81.9
4
30
925
285
228
150
85
N/A*
46.8
90.5
4
30
450
09
275
5
850
514
430
360
270
130
11.5
38.6
2
10
875
436
365
300
190
85
27
62.8
3
20
900
346
277
193
120
N/A*
46.7
90
4
30
925
313
250
175
95
N/A*
51.6
99.5
4
304
5010
300
5
850
560
470
400
300
150
11.5
38.6
2
10
875
476
410
340
200
90
29.3
68.5
3
20
900
378
302
210
130
N/A*
51
98.2
4
30
925
342
273
190
100
N/A*
56.3
108.6
4
3
4
5
6
7
8
1
2
1
- Delivery pressure gauge
2
- Air/steam pressure gauge
3
- Eccentric adjusting screw
4
- Piston snap ring
5
- Piston calibration nut and lock nut
6
- Eccentric locking screws
7
- Variable eccentric
8
- Casing
Fig. 10
D3699
Summary of Contents for P 140 P/NA
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