Pump Pressure Adjustment - Sime 25-35 BF TS Manual Del Usaurio

passed through the aperture on the
right or left hand side of the shell for
connection to the pump (fig. 7 - 7/a).
Important
– Make sure, before turning on the
boiler, that the return tube is free.
An excessive counter -pressure
would break the pump seal.
– Make sur e t hat t he tubes ar e
sealed.
– The maximum depression of 0.4 bar
(300 mmHg) (see Table 1 ) must not
be exceeded. Gas is freed from the
fuel above that value and can cause
cavitation of the pump.
– It's advisable to bring the return
tube in the depression systems up
to the same height of the intake
tube. In this case the foot valve is
unnecessary.
If instead the return tube arrives
above the fuel level, the foot valve is
indispensable.
Starting the pump
Turn on the burner to start the pump
and check the flame ignition.
If a "lock out" occur s before fuel
arrival, wait for at least 20 seconds
then press the burner release button
"RESET" and wait for the whole start-
up operation to repeat until the flame
lights up.
2.5 BURNER ADJUSTMENTS
Each unit is shipped with a burner unit
equipped with a nozzle and calibrated
at the factory; it is recommended,
however, that the settings listed under
point 1.3 be checked, with reference
to atmospheric pressure at sea level.
If it is necessary to adjust the burner
differently from the factory settings,
this should be done by authorised per-
sonnel following the instructions pro-
vided below.
The burner adjustments allow opera-
tion up to an altitude of 1300 m above
sea level.
2.5. 1 Air lock adjustment
To adjust the air lock, loosen the screw
(1 fig. 8) and slide the graduated scale
(2 fig. 8) indicating the position air lock
position.
The values for adjustment of each unit
are given in point 1.3.
9 10 9
C ONNECTIONS
1 Vacuometer attachment
2 Pressure regulator
3 Manometer attachment
4 By-pass screw
5 Back-flow flexible pipe
(included in supply)
ATTENTION:
- loosen the pump joints (5-6) before pointing the flexible pipes for bringing
them out from the prefixed opening on the right/left hand side of the shell.
Afterwards tighten the joints to the pump.
- The pump is prearranged for the double-tube function. Remove the by-pass
screw (4) for single tube function.

2.5.2 Pump pressure adjustment

To adjust gas-oil pressure, turn the
screw (3 fig. 8/a) and check pressure
TABLE 1
H L (meters)
meters øi tube
8 mm
0 35
0,5 30
1 25
1,5 20
2 15
3 8
3,5 6
H = Difference in level
L = Maximum length
of the intake tube
8
7
6
6 Suction flexible pipe
(included in supply)
7 Auxiliary pressure intake
8 Valve
9 Racor 3/8" (included in supply)
10 Fuel feed line filter
(included in supply)
with a pressure gauche connected to
the intake (2 fig. 8/a), making sure
pressure corresponds to the value
given under point 1.3.
øi tube
10 mm
100
100
100
90
70
30
20
Fig. 7
1
2
3
4
5
Fig. 7/a
67