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Pressure controller
D2001
1 - Pressure switch plug
2 - Manometer for pressure in delivery line
3 - Manometer for pressure in return line
4 - Eccentric adjusting screw
5 - Ring for piston stop
6 - Nut and lock-nut for piston rating
7 - Eccentric locking screws
8 - Variable eccentric
9 - Cover
The eccentric (8) setting should be carried out as follows:
remove the cover (9), loosen the screws (7), and act on the screw
(4) to obtain the desired eccentricity. Turn clockwise (+) the
screw (4) to increase the eccentricity, increasing the difference
between the min. and max. capacity of the nozzle; turn anticlock-
wise (-) to decrease the eccentricity and, consequently the differ-
ence between the min. and max. capacity of the nozzle.
•
The proper setting of the eccentric (8) is possible when its op-
eration
field
follows the
(20°÷130°): so, that any variation of the servomotor position
corresponds to a pressure variation.
•
Never let the piston batter: the stop ring (5) determines the
max. stroke.
•
When the setting is carried out, verify manually that no slow-
down occurs between 20° and 130° and further the maximum
and minimum pressures correspond to those chosen as per
diagram of page 15.
•
If you wish to check the delivery capacity of the nozzle, pro-
ceed as follows:
Open the burner according to instructions at page 13, place
the nozzle, simulate the start-up and then proceed with the
weighing at the maximum and minimum pressures.
•
If at maximum capacity of the nozzle (maximum pressure in
the return line) pressure fluctuations are detected on the ma-
nometer (3), slightly decrease the pressure till their complete
elimination.
20036074
2
3
servomotor
operation
Installation
1
5
field
GB
16
6
9
7
8
4
Fig. 10
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