20140894
24
GB
Installation
5.11.1
Technical data
Tab. K
1 Min. delivery rate at 12 bar pressure
2 Delivery pressure range
3 Max. suction depression
4 Viscosity range
5 Light oil max. temperature
6 Max. suction and return pressure
7 Pressure calibration in the factory
8 Filter mesh width
G = cylindrical thread
The connector to be screwed into the cylindrical thread G must
be equipped with a sealing washer.
Do not screw a connector with a conical thread (NPTF) into the
cylindrical thread G.
NOTE
•
The pump is equipped with a bypass that connects return line
and the suction line.
The pump is installed on the burner with the bypass closed
by screw 6) (Fig. 37 on page 35).
When single-pipe fuel supply systems without degaussing
units (Fig. 19 on page 22) are used, this screw, accessible
from the connector 2), must be removed. In this way, the ex-
cess in the delivery discharged by the pressure regulator into
the return line passes into the suction line.
The pump will break immediately if it is run with the return line
closed and the bypass screw inserted.
•
The vacuum meter attachment is located upstream from the
pump filter and consequently it is not able to detect a clogged
filter.
•
The pump is delivered from the factory already full of fuel and
with its return and suction connections plugged. This stops
the gear unit rusting and permits the pump to prime upon first
starting.
•
Water must be prevented from accumulating on the bottom of
the tank, due to infiltration or condensation, and subsequent-
ly reaching the pump. Water in the pump will lead to rusting
and eventually the pump will have to be renewed.
5.11.2
Pump priming
–
Also check to make sure that the valves located on the suc-
tion line are open and that there is sufficient fuel in the tank.
–
In order for self-priming to take place, the pressure gauge at-
tachment plug located on the pump (or the gauge itself, if ap-
plied) ( ‘Pump” on page 23) must be loosened in order to
bleed off the air contained in the suction line and bring the
pump delivery pressure to zero.
–
Do not illuminate the sensor; otherwise, the burner will fail to
start.
–
Start the burner by closing the control device and the electri-
cal line main switch. The pump must rotate in the direction in-
dicated by the arrow marked on the cover or the pump body.
–
When the gas oil begins to flow out of the gauge attachment,
the pump is primed. At this point, stop the burner immediate-
ly.
The time required for this operation depends upon the diameter
and length of the suction tubing. If the pump fails to prime at the
first starting of the burner and the burner locks out, wait approx.
40 seconds, reset the burner, and then repeat the starting oper-
ation as often as required.
AN 67
AN 77
J 6
1
2
3
4
5
6
7
8
kg/h
bar
bar
cSt
°C
bar
bar
mm
65
10 - 18
0,45
2 - 75
60
2
12
0,150
90
10 - 18
0,45
2 - 75
60
2
12
0,150
164
10 - 21
0,45
2,8 - 200
70
1,5
12
0,170
WARNING
Before starting the burner, make sure that the
tank return line is not clogged.
Obstructions in the line could cause the seal-
ing organ located on the pump shaft to break.
(The pump leaves the factory with the by-pass
closed).
WARNING
The a.m. operation is possible because the pump
is already full of fuel when it leaves the factory. If
the pump has been drained, fill it with fuel through
the opening on the vacuum meter prior to starting;
otherwise, the pump will seize. Whenever the
length of the suction piping exceeds 20-30 me-
ters, the supply line must be filled by hand using a
separate pump.
Once the pump has been primed, screw in the
plug or the gauge on the pump's delivery line tight-
ly and close the control devices.
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