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5.12.5 Hydraulic circuit diagram
15
P
V
1
M
3
4
2
Key (Fig. 21)
1
Pump suction line
2
Pump return line and nozzle return line
3
Pump by-pass screw
4
Pump pressure regulator
5
Safety valve
6
Safety valve
7
Nozzle delivery line
8
Nozzle without interception rod
9
Nozzle return line
10 Pressure adjuster on nozzle return line
11 Servomotor
12 Pressure switch on nozzle return line
13 Safety valve on nozzle return line
14 Safety valve on nozzle return line
15 Pressure switch on pump delivery line
B
Oil valve unit and pressure variator
M
Pressure gauges
V
Vacuometer connection
OPERATION
Pre-purging phase:
valves 5), 6), 13) and 14) closed.
Ignition and operation phase:
valves 5), 6), 13) and 14) open.
Stop: all valves closed.
20148124
SM
M
M
6
5
10
12
14
13
P
Installation
5.12.6 Priming pump
7
8
ATTENTION
9
In order for the pump (Fig. 22) to self-prime, it is vital that the
screw 4) of the pump be loosened to vent the air contained
in the suction line.
Start the burner by closing the remote controls.
As soon as the burner starts, check the direction of rotation
B
of the fan blade.
The pump can be considered to be primed when the light oil
starts coming out of the screw 4). Close the burner and undo
11
the screws 4).
SM
D8362
Fig. 21
D9249
Key (Fig. 22)
1
Suction line
2
Return line
3
Pressure switch connection G 1/4"
4
Vacuometer connection
5
Pressure adjuster
6
By-pass screw
7
Pressure gauge connection G 1/4"
SUNTEC TA5 PUMP
Min. delivery rate at 16.5 bar pressure
Delivery pressure range
Max. suction depression
Viscosity range
Max. light oil temperature
Max. suction and return pressure
Pressure calibration in the factory
The time required for this operation depends upon the diameter
and length of the suction tubing. If the pump fails to prime at first
start-up and the burner locks out, wait approx. 15 seconds, reset
the burner, and then repeat the start-up operation.
And so on. After 5 or 6 starting operations allow 2 or 3 minutes
for the transformer to cool.
Do not light the sensor in order to prevent the burner lockout; the
burner locks out in any case about ten seconds after its start.
ATTENTION
22
GB
Before starting the burner, make sure that the tank
return line is not clogged.
Obstructions in the line could cause the sealing
organ located on the pump shaft to break.
G 1/2"
G 1/2"
G 1/4"
The above-mentioned 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
4)(Fig. 22) prior to starting; otherwise, the pump
will seize.
Whenever the length of the suction piping
exceeds 20-30 meters, the supply line must be
filled using a separate pump.
Fig. 22
560 kg/h
6 - 30 bar
0.45 bar
4 - 800 cSt
140 °C
5 bar
22-20 bar
the
vacuometer
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