C.I.B. UNIGAS - M039134CD
20
Adjusting the actuator cams
Refer to the next table for cams functions.
z
Berger STA12: this actuator is not provided with the manual control of the air damper. The adjustment of the cams is carried out by
means of a screwdriver, by twisting the
VS
screw located inside the cam.
z
Siemens SQN72: a key is provided to move cams I and IV, the other cams can be moved by means of screws. On the Siemens
actuator the AUTO/MAN mode is provided (see picture).
During the first setting, set the cam III (Berger) / IV (Siemens) between the cams I and II. Then, passing from the low to high flame
stage, or viceversa, change the setting according to the flame composition: if cam III is too near to the low flame position (cam II), flue
gas can take place, because there is more fuel than air; if cam III is too near to the high flame (cam I), the flame could fade because of
too much air.
mod.
LO280
Pumps
Berger STA4.5
Siemens SQN72
BERGER STA
Siemens SQN72
”Air adjustment in high flame” cam
I
I (red)
Air adjustment in low flame - Stand-by - Ignition cam
II
II (blue)
EVG2 opening (2nd nozzle)
III
IV (black)
Pump Suntec AS47 A
Viscosity
2 ÷ 12 mm²/s (cSt)
Fuel temperature
0 ÷ 60 °C
Maximum inlet pressure
2 bar
Minimum inlet pressure
- 0.45 bar to avoid gasing
Maximum Return pressure
2 bar
Maximum speed
3600 rpm
Pump Suntec AT2 45A
Viscosity range
2 ÷ 12 (cSt) mm
2
/s
Oil temperature max
60 °C
Inlet pressure
2 bar
- 0.35 barto avoid gasing
Maximum return pressure
2 bar
Maximum speed
3600 rpm
Keys for Suntec AS47 A pump
1 Pressure governor
2 Manometer
3 Vacuum gauge
4 Solenoid valve
5 Nozzle outlet
7 Suction
8 Return
Keys for Suntec A T2 45A pump
1 Low pressure regulation (first stage)
2 Manometer
3 Vacuum gauge
4 Light oil solenoid valve
4a High-low pressure solenoid valve
5 Nozzle outlet
6 High pressure regulation (second stage)
7 Suction
8 Return (with internal by-pass plug)
I
II
III
VS
IV
II
I
AUTO/MAN
